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<RECORD 1>

Accession number:20152600969169
Title:Characterization of far field of diode laser by three dimensional measurement
Authors:Liu, Hui (1, 2); Yuan, Zhiyuan (1); Cui, Long (1); Wu, Di (1); Liu, Xingsheng (1, 2)
Author affiliation:(1) Focuslight Technologies Co. LTD, 56 Zhangba 6th Road, Xi'an, Shaanxi, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, 17 Xinxi Road, Xi'an, Shaanxi, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9346
Volume title:Components and Packaging for Laser Systems
Part number:1 of 1
Issue date:2015
Publication year:2015
Article number:93461A
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628414363
Document type:Conference article (CA)
Conference name:Components and Packaging for Laser Systems
Conference date:February 9, 2015  -  February 12, 2015
Conference location:San Francisco, CA, United states
Conference code:112114
Sponsor:The Society of Photo-Optical Instrumentation Engineers (SPIE)
Publisher:SPIE
Abstract:In this paper three dimensional characterization of the far field of diode laser beam is proposed. Both the divergence angle and intensity distribution can be extracted and analyzed from the measurement results with obliquity factor correction and power transmission correction. The instrument provides high resolution and fast measurement. &copy; 2015 SPIE.
Number of references:12
Main heading:Semiconductor lasers
Controlled terms:Laser beams
Uncontrolled terms:Dimensional characterization - Divergence angle - Far field - Fast measurement - High resolution - Intensity distribution - Three-dimensional measurements
Classification code:744.4.1  Semiconductor Lasers - 744.8  Laser Beam Interactions
DOI:10.1117/12.2076548

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 2>

Accession number:20153901310774
Title:Polarization modulation of parallel circular polarization recorded grating in bacteriorhodopsin induced by polarized violet light
Authors:Huang, Hai-Kun (1); Yang, Chen-Xiao (1); Li, Ruo-Ping (1); Huang, Ming-Ju (1); Yao, Bao-Li (2); Han, Jun-He (1)
Author affiliation:(1) Lab of Optoelectronic Information Materials and devices in Henan Province, College of Physics and Electronics, Henan University, Kaifeng; Henan, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
Corresponding author:Han, Jun-He
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:44
Issue:8
Issue date:August 1, 2015
Publication year:2015
Article number:0805002
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:A theoretical model for calculating the diffraction efficiency kinetics of the grating recorded by two parallel circular polarized recording beams was proposed, based on Jones-matrix and photochromic two-state theory. The diffraction efficiency of bacteriorhodopsin grating was measured by system of four-wave coupled light path. The theoreical analysis and the experimental results show that, in the condition of adding linearly polarized auxiliary violet light, when linearly polarized reconstruction light parallel with linearly polarized auxiliary violet light, the diffraction efficiency of bacteriorhodopsin grating is maximum; when linearly polarized reconstruction light perpendicular to linearly polarized auxiliary violet light, the diffraction efficiency of bacteriorhodopsin grating is minimum. The angle between linearly polarized reconstruction light and linearly polarized auxiliary violet light produces a cosine modulation on the kinetics of the diffraction efficiency. It indicates that parallel circular polarization recorded grating in bacteriorhodopsin induced by polarized violet light became polarizing grating. &copy;, 2015, Chinese Optical Society. All right reserved.
Number of references:23
Page count:6
Main heading:Diffraction gratings
Controlled terms:Circular polarization - Diffraction - Diffraction efficiency - Efficiency - Modulation - Polarization
Uncontrolled terms:Bacteriorhodopsin - Circular polarized - Cosine modulation - Grating - Linearly polarized - Photo-induced anisotropy - Polarization modulation - Theoretical modeling
Classification code:711  Electromagnetic Waves - 711.1  Electromagnetic Waves in Different Media - 716  Telecommunication; Radar, Radio and Television - 717  Optical Communication - 718  Telephone Systems and Related Technologies; Line Communications - 741  Light, Optics and Optical Devices - 743  Holography - 913.1  Production Engineering
DOI:10.3788/gzxb20154408.0805002

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 3>

Accession number:20160701924924
Title:Integrated frequency comb source based Hilbert transformer for wideband microwave photonic phase analysis
Authors:Nguyen, Thach G. (1); Shoeiby, Mehrdad (1); Chu, Sai T. (2); Little, Brent E. (3); Morandotti, Roberto (4); Mitchell, Arnan (1, 5); Moss, David J. (1)
Author affiliation:(1) School of Electrical and Computer Engineering, RMIT University, Melbourne; VIC, Australia; (2) Department of Physics and Materials Science, City University of Hong Kong, Hong Kong; (3) Xi'an Institute of Optics and Precision Mechanics, CAS, Xi'an, China; (4) INSR, &Eacute;nergie, Mat&eacute;riaux et T&eacute;l&eacute;communications, 1650 Blvd Lionel Boulet, Varennes; QC, Canada; (5) ARC Centre of Excellence for Ultrahigh Bandwidth Devices for Optical Systems (CUDOS), Australia
Source title:Optics Express
Abbreviated source title:Opt. Express
Volume:23
Issue:17
Issue date:August 24, 2015
Publication year:2015
Pages:22087-22097
Language:English
E-ISSN:10944087
Document type:Journal article (JA)
Publisher:OSA - The Optical Society
Abstract:We demonstrate a photonic RF Hilbert transformer for broadband microwave in-phase and quadrature-phase generation based on an integrated frequency optical comb, generated using a nonlinear microring resonator based on a CMOS compatible, high-index contrast, doped-silica glass platform. The high quality and large frequency spacing of the comb enables filters with up to 20 taps, allowing us to demonstrate a quadrature filter with more than a 5-octave (3 dB) bandwidth and an almost uniform phase response. &copy; 2015 Optical Society of America.
Number of references:35
Main heading:Microwave resonators
Controlled terms:Bandwidth
Uncontrolled terms:Frequency combs - Frequency spacing - High index contrast - Hilbert transformers - In-phase and quadrature-phase - Microring resonator - Quadrature filters - Wideband microwaves
Classification code:714  Electronic Components and Tubes - 716.1  Information Theory and Signal Processing
DOI:10.1364/OE.23.022087

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 4>

Accession number:20153701265618
Title:High-energy pulse generation using Yb-doped Q-switched fiber laser based on single-walled carbon nanotubes
Authors:Wang, Jun-Li (1); Wang, Xue-Ling (1); He, Bo-Rong (1); Zhu, Jiang-Feng (1); Wei, Zhi-Yi (2); Wang, Yong-Gang (3)
Author affiliation:(1) School of Physics and Optoelectronic Engineering, Xidian University, Xi'an, China; (2) Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, China; (3) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
Corresponding author:Wang, Jun-Li
Source title:Chinese Physics B
Abbreviated source title:Chin. Phys.
Volume:24
Issue:9
Issue date:September 1, 2015
Publication year:2015
Article number:097601
Language:English
ISSN:16741056
Document type:Journal article (JA)
Publisher:Institute of Physics Publishing
Abstract:An all-fiber laser using a single-walled carbon nanotube (SWCNT) as the saturable absorber (SA) for Q-switched operation in the 1031 nm region is demonstrated in this work. A lasing threshold as low as 17 mW was realized for continuous wave operation. By further increasing the pump power, stable Q-switched pulse trains are obtained when the pump power ranges from 38 mW to 125 mW, corresponding to repetition rate varying from 40.84 kHz to 66.24 kHz, the pulse width from 2.0 &mu;s to 1.0 &mu;s and the highest single pulse energy of 40.6 nJ respectively. &copy; 2015 Chinese Physical Society and IOP Publishing Ltd.
Number of references:36
Main heading:Single-walled carbon nanotubes (SWCN)
Controlled terms:Fiber lasers - Optical pumping - Pulse generators - Pulse repetition rate - Q switched lasers - Q switching - Saturable absorbers - Yarn - Ytterbium
Uncontrolled terms:All-fiber lasers - Continuous wave operation - High energy pulse - Q-switched fiber lasers - Q-switched operation - Q-switched pulse - Single pulse energy - Singlewalled carbon nanotube (SWCNT)
Classification code:547.2  Rare Earth Metals - 713.4  Pulse Circuits - 741.1  Light/Optics - 741.1.2  Fiber Optics - 744  Lasers - 761  Nanotechnology - 819.4  Fiber Products
DOI:10.1088/1674-1056/24/9/097601

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 5>

Accession number:20161702279092
Title:Athermalization design of collimating lens system for space solar telescope
Authors:Tao, Shuaiyang (1, 2); Yang, Jianfeng (1); Ma, Xiaolong (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an, China; (2) Graduate School of the Chinese Academy of Sciences, Beijing, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9795
Monograph title:Selected Papers of the Photoelectronic Technology Committee Conferences held June-July 2015
Issue date:2015
Publication year:2015
Article number:979504
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628418804
Document type:Conference article (CA)
Conference name:International Conference on Frontiers in International Conference on Frontiers in Terahertz Technology and Applications, and the International Symposium on Surface Topography and Optical Microscopy
Conference date:July 23, 2015  -  July 25, 2015
Conference location:Harbin, China
Conference code:117486
Sponsor:Chinese Academy of Engineering; Chinese Society for Optical Engineering; Harbin Institute of Technology; National Natural Science Foundation of China
Publisher:SPIE
Abstract:The Solar Magnetic Field Telescope (MFT) , which imaged directly towards the sun , received about 1000W heat load irradiating into the telescope system, resulting in changes of ambient temperature. According to the principles of athermal design, a collimating lens system was designed, allowing MFT to work properly between a wider temperature range . The collimating lens system with F number of 3.55, worked in the visible spectrum, had the effective focal length of 156.4mm and the full field of view of 2.8 arc min &times;2.8 arc min. Through the passive optical athermal method , the optimized lens works at ambient temperature ranging from -40&deg; to 60&deg;.The radii of RMS are all smaller than the pixel pitch. The image quality approaches to diffraction limit and the MTF value is over 0.75, which satisfies the system specifications. &copy; 2015 SPIE.
Number of references:5
Main heading:Lenses
Controlled terms:Diffraction - Focusing - Optical design - Optical systems - Specifications - Surface topography - Telescopes - Temperature
Uncontrolled terms:Athermalization - Collimating lens - Diffraction limits - Effective focal lengths - Solar magnetic fields - Space solar telescope - System specification - Temperature range
Classification code:641.1  Thermodynamics - 741.1  Light/Optics - 741.3  Optical Devices and Systems - 902.2  Codes and Standards - 931.2  Physical Properties of Gases, Liquids and Solids
DOI:10.1117/12.2207993

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 6>

Accession number:20161602266775
Title:A modified star map identification method suitable for astronomical camera
Authors:Liu, Meiying (1); Wang, Hu (1); Wen, Desheng (1); Liu, Jie (1); Xue, Yaoke (1); Liu, Yang (1); Zhao, Hui (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, No. 17 Xinxi Road, Xi'an, China
Corresponding author:Liu, Meiying(liumeiying@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9675
Monograph title:AOPC 2015: Image Processing and Analysis
Issue date:2015
Publication year:2015
Article number:96751R
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628419009
Document type:Conference article (CA)
Conference name:Applied Optics and Photonics, China: Image Processing and Analysis, AOPC 2015
Conference date:May 5, 2015  -  May 7, 2015
Conference location:Beijing, China
Conference code:117481
Sponsor:Chinese Society for Optical Engineering
Publisher:SPIE
Abstract:High accuracy star map identification results are the basis of astronomical positioning. The traditional triangle star identification algorithm has a higher redundancy and a poor robustness to noise. Considering the specific requirements of the star map identification of the astronomical camera, in allusion to this default, proceeding with selection of guide stars, construction of guide star catalogue and realization of matching algorithm, a modified triangle algorithm based on traditional one is presented. With the proposed algorithm, the guide star is selected from astronomical durchmusterung. In order to speed up guide star indexing, the guide star catalogue is founded after dividing the sky using the overlapping rectangle method. The guide star sub-catalogue is constructed by the radius of guide triangle circumcircle and the two sides of guide triangle. The characteristic radius is used for indexing and sorted in an ascending order to improve the searching efficiency in the processing of star map identification. The matching scope of the angular distance is narrowed and the matching rate of angular distance is improved by the matching of the characteristics radius. If there exists redundancy, a normalized magnitude is used to eliminate it. Within the observing area of the real sky, the 1050 star maps continuously are calculated. The simulation results show that, the identification rate of this algorithm is greater than 97. 83% when the noise of position error is two pixels, and the average identification time is about 25. 07ms. Compared with the traditional triangle algorithm, this modified algorithm has a couple of advantages, including the smaller storage capacity of guide star catalogue, better robustness to position and magnitude error, higher rate of correcting star map identification and lower redundancy. &copy; 2015 SPIE.
Number of references:9
Main heading:Image matching
Controlled terms:Algorithms - Cameras - Image analysis - Image processing - Indexing (materials working) - Indexing (of information) - Optical data processing - Redundancy - Stars
Uncontrolled terms:Astronomical cameras - Characteristic radius - Guide star catalogues - Identification rates - Redundant match - Robustness to noise - Searching efficiency - Star map identification
Classification code:657.2  Extraterrestrial Physics and Stellar Phenomena - 723.2  Data Processing and Image Processing - 742.2  Photographic Equipment - 903.1  Information Sources and Analysis
DOI:10.1117/12.2199618

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 7>

Accession number:20150600487599
Title:A real-time axial activeanti-drift device with high-precision
Authors:Huo, Ying-Dong (1, 2); Cao, Bo (2); Yu, Bin (2); Chen, Dan-Ni (2, 3); Niu, Han-Ben (2)
Author affiliation:(1) CAS Key Laboratory of Ultrafast Diagnostics, Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an, China; (2) Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen, China; (3) State Key Laboratory of Precision Measurement Technology and Instruments, Tsinghua University, Beijing, China
Corresponding author:Niu, Han-Ben
Source title:Wuli Xuebao/Acta Physica Sinica
Abbreviated source title:Wuli Xuebao
Volume:64
Issue:2
Issue date:January 20, 2015
Publication year:2015
Article number:028701
Language:Chinese
ISSN:10003290
CODEN:WLHPAR
Document type:Journal article (JA)
Publisher:Institute of Physics, Chinese Academy of Sciences
Abstract:In a fluorescent nano-resolution microscope based on single molecular localization, drift of focal plane will bring an additional deviation to the accuracy of single molecular localization. Consequently, this will reduce the final resolution of the reconstructed image and cause image degradation. Therefore, it is vital to control the system drift to a minimum level as much as possible. In recent years, the anti-drift ways emerged in endlessly. In this paper we made a systematic study aiming at the method in which optical measurement and negative feedback control are used. The basic principle and its implementation of the system are analyzed, and possible error is also evaluated. Finally, the precision of the system is tested experimentally. With this device, axial drift can be detected and corrected automatically in time, and the axial anti-drift accuracy as high as 9.93 nm can be achieved, which is one order higher than that of the existing commercial microscopies. &copy; 2015 Chinese Physical Society.
Number of references:19
Page count:6
Main heading:Feedback
Controlled terms:Optical data processing
Uncontrolled terms:Axial anti-drift - Basic principles - Image degradation - Molecular localization - Nano resolution - Optical measurement - Quadrant detectors - Reconstructed image
Classification code:731.1  Control Systems - 741.3  Optical Devices and Systems
DOI:10.7498/aps.64.028701

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 8>

Accession number:20155101706438
Title:Detecting small moving targets based on probability hypothesis density smoother
Authors:Li, Feipeng (1, 2); Song, Zongxi (1); Li, Bin (1, 2)
Author affiliation:(1) Space Optics Laboratory, Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China
Corresponding author:Song, Zongxi(songxi@opt.ac.cn)
Source title:Journal of Information and Computational Science
Abbreviated source title:J. Inf. Comput. Sci.
Volume:12
Issue:14
Issue date:September 20, 2015
Publication year:2015
Pages:5259-5267
Language:English
ISSN:15487741
Document type:Journal article (JA)
Publisher:Binary Information Press
Abstract:In order to detect and track multiple small targets in low SNR environment, Probability Hypothesis Density (PHD) filter is proposed to solve the problem. When using the PHD filter to track small moving targets in space, the influence of measurement noise may be catastrophic. Measurement noise affects the calculation of particle weights, which results in the estimation error of targets number. This article brings in the concept of smoothing and combines it with PHD filter. When update particle weights, forward recursion and backward smoothing are both used. And at some extent, the influence of measurement noise is weakened. Finally through experiments, compared with standard PHD filter, the algorithm proposed in this article is found to be more accurate in targets number and state estimation. Copyright &copy; 2015 Binary Information Press.
Number of references:12
Main heading:Signal to noise ratio
Controlled terms:Probability - Spurious signal noise - Target tracking
Uncontrolled terms:Backward smoothing - Low-SNR environment - Particle filter - Probability hypothesis density - Probability hypothesis density filter - Small moving target - Smoother - Track before detect
Classification code:716.1  Information Theory and Signal Processing - 922.1  Probability Theory
DOI:10.12733/jics20106698

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 9>

Accession number:20152100864459
Title:Bezier interpolation for 3-D freehand ultrasound
Authors:Huang, Qinghua (1); Huang, Yanping (2); Hu, Wei (1); Li, Xuelong (3)
Author affiliation:(1) School of Electronic and Information Engineering, South China University of Technology, Guangzhou, China; (2) Department of Bioengineering, University of Washington, Seattle; WA, United States; (3) Center for Optical Imagery Analysis and Learning (OPTIMAL), Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
Source title:IEEE Transactions on Human-Machine Systems
Abbreviated source title:IEEE Trans. Human Mach. Syst.
Volume:45
Issue:3
Issue date:June 1, 2015
Publication year:2015
Pages:385-392
Article number:6982202
Language:English
ISSN:21682291
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:Freehand 3-D ultrasound (US) produces 3-D volume data of anatomical objects from a sequence of irregularly located 2-D B-mode US images (B-scans). In 3-D US, the voxel intensities are calculated by interpolating those pixels from raw B-scans. Current interpolation algorithms do not consider sparsity of the raw data and are time consuming in computation. In this paper, we aim to perform the 3-D reconstruction of freehand US with sparse raw data in a more efficient manner. A novel interpolation algorithm takes advantage of Bezier curves. A single sweep of raw B-scans is collected, and the third-order Bezier curves are employed for approximating the voxels located in a control window. In in vitro and in vivo experiments, a fetus phantom and a subject's forearm were scanned using the freehand 3-D US system and reconstructed using the proposed Bezier interpolation algorithm and three popular interpolation algorithms, respectively. The results showed that the proposed algorithm significantly outperformed the other three algorithms when the raw B-scans were relatively sparse and the interpolation error in gray level can be reduced by 0.515.07. The speed for 3-D reconstruction can be improved by 90.697.2 because a single third-order Bezier curve using four control points (i.e., the pixel points) is able to estimate more than four voxels, whereas the estimation of a voxel value often requires a number of pixels in conventional techniques. &copy; 2015 IEEE.
Number of references:18
Main heading:Interpolation
Controlled terms:Algorithms - Computer graphics - Geometry - Image processing - Pixels - Ultrasonics
Uncontrolled terms:3D reconstruction - Bezier curve - Freehand ultrasound - Realtime imaging - Signal interpolation - Sparse data
Classification code:723.5  Computer Applications - 741  Light, Optics and Optical Devices - 753.1  Ultrasonic Waves - 921  Mathematics
DOI:10.1109/THMS.2014.2374551

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 10>

Accession number:20161702279073
Title:Topology optimization design of a space mirror
Authors:Liu, Jiazhen (1, 2); Jiang, Bo (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an, China; (2) Graduate School of the Chinese Academy of Sciences, Beijing, China
Corresponding author:Liu, Jiazhen
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9795
Monograph title:Selected Papers of the Photoelectronic Technology Committee Conferences held June-July 2015
Issue date:2015
Publication year:2015
Article number:97952Y
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628418804
Document type:Conference article (CA)
Conference name:International Conference on Frontiers in International Conference on Frontiers in Terahertz Technology and Applications, and the International Symposium on Surface Topography and Optical Microscopy
Conference date:July 23, 2015  -  July 25, 2015
Conference location:Harbin, China
Conference code:117486
Sponsor:Chinese Academy of Engineering; Chinese Society for Optical Engineering; Harbin Institute of Technology; National Natural Science Foundation of China
Publisher:SPIE
Abstract:As key components of the optical system of the space optical remote sensor, Space mirrors' surface accuracy had a direct impact that could't be ignored of the imaging quality of the remote sensor. In the future, large-diameter mirror would become an important trend in the development of space optical technology. However, a sharp increase in the mirror diameter would cause the deformation of the mirror and increase the thermal deformation caused by temperature variations. A reasonable lightweight structure designed to ensure the optical performance of the system to meet the requirements was required. As a new type of lightweight approach, topology optimization technology was an important direction of the current space optical remote sensing technology research. The lightweight design of rectangular mirror was studied. the variable density method of topology optimization was used. The mirror type precision of the mirror assemblies was obtained in different conditions. PV value was less than &lambda;/10 and RMS value was less than &lambda;/50(&lambda; = 632.8nm). The results show that the entire The mirror assemblies can achieve a sufficiently high static rigidity, dynamic stiffness and thermal stability and has the capability of sufficient resistance to external environmental interference . &copy; 2015 SPIE.
Number of references:7
Main heading:Mirrors
Controlled terms:Deformation - Motion compensation - Optical systems - Remote sensing - Shape optimization - Surface topography - Topology
Uncontrolled terms:Environmental interference - Lightweight - Optical remote sensing - Optimization technology - Space optical remote sensor - Temperature variation - Thermal deformation - Variable density methods
Classification code:741.3  Optical Devices and Systems - 921.4  Combinatorial Mathematics, Includes Graph Theory, Set Theory - 921.5  Optimization Techniques - 931.2  Physical Properties of Gases, Liquids and Solids
DOI:10.1117/12.2209031

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 11>

Accession number:20161602265261
Title:Color enhancement algorithm for low-quality image based on gamma mapping
Authors:Guo, Huinan (1); Zhang, Gaopeng (1); Mei, Chao (1); Zhang, Derui (1); Song, Xiaodong (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, No.17, Xinxi Road, Gaoxin District, Xi'an, Shaanxi, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9794
Monograph title:Sixth International Conference on Electronics and Information Engineering
Issue date:2015
Publication year:2015
Article number:97941X
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510600294
Document type:Conference article (CA)
Conference name:6th International Conference on Electronics and Information Engineering, ICEIE 2015
Conference date:September 26, 2015  -  September 27, 2015
Conference location:Dalian, China
Conference code:117485
Sponsor:Dalian University, Key Laboratory of Advanced Design and Intelligent Computing; Ministry of Education
Publisher:SPIE
Abstract:Color quality plays an important role in imaging and displaying. For the Low-quality image, we propose a new method in this paper that is based on gamma mapping to improve color contrast and restore color expression of real world scene. The main idea of the proposed approach is that according to human vision characteristics uses logarithm transformation to extend luminance response of image so; meanwhile, adopts the gamma mapping to enhance the contrast of highlight and dark regions. To approve the proposed method, two well-known algorithms are selected and their contrast results are also presented. The results show that the proposed approach performs better than other traditional methods for color restoration which is of good robustness. &copy; 2015 SPIE.
Number of references:10
Main heading:Color
Controlled terms:Algorithms - Computer vision - Image processing - Mapping - Restoration
Uncontrolled terms:Color contrast - Color enhancement - Color quality - Color restoration - Dark region - Human vision - Low qualities - Real-world
Classification code:405.3  Surveying - 741.1  Light/Optics - 741.2  Vision
DOI:10.1117/12.2202930

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 12>

Accession number:20150900579166
Title:Image classification with densely sampled image windows and generalized adaptive multiple kernel learning
Authors:Yan, Shengye (1); Xu, Xinxing (2); Xu, Dong (2); Lin, Stephen (3); Li, Xuelong (4)
Author affiliation:(1) Nanjing University of Information Science and Technology, Nanjing, China; (2) School of Computer Engineering, Nanyang Technological University, Singapore; (3) Microsoft Research, Beijing, China; (4) Center for Optical Imagery Analysis and Learning, State Key Laboratory of Transient Optics and Photonics, Xian Institute of Optics and Precision Mechanics, Xian, China
Source title:IEEE Transactions on Cybernetics
Abbreviated source title:IEEE Trans. Cybern.
Volume:45
Issue:3
Issue date:March 1, 2015
Publication year:2015
Pages:395-404
Article number:6842648
Language:English
ISSN:21682267
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:We present a framework for image classification that extends beyond the window sampling of fixed spatial pyramids and is supported by a new learning algorithm. Based on the observation that fixed spatial pyramids sample a rather limited subset of the possible image windows, we propose a method that accounts for a comprehensive set of windows densely sampled over location, size, and aspect ratio. A concise high-level image feature is derived to effectively deal with this large set of windows, and this higher level of abstraction offers both efficient handling of the dense samples and reduced sensitivity to misalignment. In addition to dense window sampling, we introduce generalized adaptive &ell; <inf>p</inf>-norm multiple kernel learning (GA-MKL) to learn a robust classifier based on multiple base kernels constructed from the new image features and multiple sets of prelearned classifiers from other classes. With GA-MKL, multiple levels of image features are effectively fused, and information is shared among different classifiers. Extensive evaluation on benchmark datasets for object recognition (Caltech256 and Caltech101) and scene recognition (15Scenes) demonstrate that the proposed method outperforms the state-of-the-art under a broad range of settings. &copy; 2013 IEEE.
Number of references:50
Main heading:Image classification
Controlled terms:Aspect ratio - Classification (of information) - Genetic algorithms - Object recognition
Uncontrolled terms:Adapted classifiers - Benchmark datasets - Level of abstraction - Multiple Kernel Learning - Reduced sensitivity - Scene recognition - Spatial pyramids - State of the art
Classification code:716  Telecommunication; Radar, Radio and Television - 716.1  Information Theory and Signal Processing - 723  Computer Software, Data Handling and Applications - 921  Mathematics - 943  Mechanical and Miscellaneous Measuring Instruments
DOI:10.1109/TCYB.2014.2326596

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 13>

Accession number:20155201715844
Title:Demonstration of 20Gb/s polarization-insensitive wavelength switching system for high-speed free-space optical network
Authors:Qian, Feng-Chen (1, 2, 3); Ye, Ya-Lin (3); Wen, Yu (3); Duan, Tao (1); Feng, Huan (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) Graduate University, Chinese Academy of Sciences, Beijing, China; (3) Xi'an Communication Institute, Xi'an, China
Corresponding author:Qian, Feng-Chen
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9679
Monograph title:AOPC 2015: Optical Fiber Sensors and Applications
Issue date:2015
Publication year:2015
Article number:967908
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628419047
Document type:Conference article (CA)
Conference name:Applied Optics and Photonics, China: Optical Fiber Sensors and Applications, AOPC 2015
Conference date:May 5, 2015  -  May 7, 2015
Conference location:Beijing, China
Conference code:117016
Sponsor:Chinese Society for Optical Engineering
Publisher:SPIE
Abstract:A 20Gb/s polarization-insensitive all-optical wavelength switching system for high-speed free-space optical communication (FSO) network is experimentally demonstrated All-optical wavelength conversion (AOWC) is implemented using four-wave mixing (FWM) by highly-nonlinear fiber (HNLF). In the experimental setup, a simple actively mode-locked fiber ring laser (AML-FRL) with repetition frequency from 1 to 15 GHz is used to generate eight 2.5Gb/s tributary signals, which are multiplexed into one 20Gb/s optical data stream. At the receiver, the 20 Gb/s OTDM data stream is demultiplexed down to 2.5 Gb/s via a polarization-insensitive FWM scheme. The whole space communication distance is over 10 meters in building hallway. The experimental results show that this system can stably run over 24 hours at 10<sup>-9</sup>BER level, thus the proposed architecture can work at higher rate with wavelength-division multiplexing (WDM) and high order modulation schemes. &copy; 2015 SPIE.
Number of references:11
Main heading:Optical communication
Controlled terms:Data communication systems - Fiber optic sensors - Fibers - Four wave mixing - Multiplexing - Nonlinear optics - Optical design - Optical fiber communication - Optical fibers - Optical frequency conversion  - Optical switches - Optical waveguides - Polarization - Ring lasers - Switching systems - Time division multiplexing - Wavelength division multiplexing
Uncontrolled terms:All-optical switching - All-optical wavelength conversion - Free Space Optical communication - Free space optical networks - Highly nonlinear fiber(HNLF) - Optical time division multiplexing - Polarization-insensitive - Proposed architectures
Classification code:717.1  Optical Communication Systems - 741  Light, Optics and Optical Devices - 744  Lasers
DOI:10.1117/12.2197788

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 14>

Accession number:20154201412981
Title:Transparent and Dense Ladder-Like Alkylene-Bridged Polymethylsiloxane Coating with Enhanced Water Vapor Barrier Property
Authors:Zhang, Ce (1, 4); Zhang, Cong (1, 4); Cui, Xinmin (1, 4); Sun, Jinghua (1, 4); Ding, Ruimin (2); Zhang, Qinghua (3); Xu, Yao (2)
Author affiliation:(1) Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, Shanxi, China; (2) Xian Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xian, Shaanxi, China; (3) Chengdu Fine Optical Engineering Research Center, Chengdu, Sichuan, China; (4) University of Chinese Academy of Sciences, Beijing, China
Corresponding author:Zhang, Qinghua
Source title:ACS Applied Materials and Interfaces
Abbreviated source title:ACS Appl. Mater. Interfaces
Volume:7
Issue:40
Issue date:October 14, 2015
Publication year:2015
Pages:22157-22165
Language:English
ISSN:19448244
E-ISSN:19448252
Document type:Journal article (JA)
Publisher:American Chemical Society
Abstract:Organic-inorganic hybrid composites have been well-studied as water vapor barrier materials for their long diffusion length of water vapor in coatings which can be realized by improving the aspect ratio of inorganic components and regularity of nanostructure in coatings. In this paper, dense organic-inorganic hybrid coating based on ladder-like alkylene-bridged polymethylsiloxane (ABPMS) was successfully fabricated through the hydrosilylation reaction between polymethylhydrosiloxane and diene (1,5-hexadiene or 1,7-octadiene) in toluene under Pt/C catalysis. Its ladder-like structure was verified by<sup>29</sup>Si magic angle spinning (MAS) NMR,<sup>13</sup>C MAS NMR, and in-plane and out-of-plane glance-incident X-ray diffraction (GIXRD) techniques. Its corresponding coating showed excellent water vapor barrier ability for a typical water-soluble crystal, potassium dihydrogen phosphate (KDP). When treated in 50% relative humidity (RH) condition at 25 &deg;C for 8 months, the ABPMS coating with 100 nm thickness displayed a very low transmittance loss of 1.6% compared with the high transmittance loss of 10% for uncoated KDP. Moreover, the ABPMS coating showed good ultraviolet radiation resistance, thermal stability, low mechanical property, and excellent compatibility with hydrophobic antireflective (AR) coatings. &copy; 2015 American Chemical Society.
Number of references:35
Main heading:Diffusion coatings
Controlled terms:Aspect ratio - Building materials - Coatings - Hybrid materials - Hydrosilylation - Inorganic coatings - Ladders - Magic angle spinning - Olefins - Water vapor  - X ray diffraction
Uncontrolled terms:Dense coating - Ladder-like polymers - Magic angle spinning NMR - Organic-inorganic hybrid coatings - Organic-inorganic hybrid composites - Polymethylsiloxanes - Potassium dihydrogen phosphate - Water vapor barriers
Classification code:405.1  Construction Equipment - 804.1  Organic Compounds - 813.2  Coating Materials - 931.2  Physical Properties of Gases, Liquids and Solids
DOI:10.1021/acsami.5b08084

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 15>

Accession number:20151100635511
Title:Research on the error model of airborne celestial/inertial integrated navigation system
Authors:Zheng, Xiaoqiang (1); Deng, Xiaoguo (1); Yang, Xiaoxu (1); Dong, Qiang (2)
Author affiliation:(1) Graduate University of Chinese Academy of Sciences, Beijing, China; (2) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9449
Volume title:International Conference on Photonics and Optical Engineering, icPOE 2014
Part number:1 of 1
Issue date:2015
Publication year:2015
Article number:944928
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628415650
Document type:Conference article (CA)
Conference name:International Conference on Photonics and Optical Engineering, icPOE 2014
Conference date:October 13, 2014  -  October 15, 2014
Conference location:Xi'an, China
Conference code:111356
Sponsor:Optics and Photonics Society of Singapore; Shaanxi Optical Society; Shaanxi Provincial Physical Society
Publisher:SPIE
Abstract:Celestial navigation subsystem of airborne celestial/inertial integrated navigation system periodically correct the positioning error and heading drift of the inertial navigation system, by which the inertial navigation system can greatly improve the accuracy of long-endurance navigation. Thus the navigation accuracy of airborne celestial navigation subsystem directly decides the accuracy of the integrated navigation system if it works for long time. By building the mathematical model of the airborne celestial navigation system based on the inertial navigation system, using the method of linear coordinate transformation, we establish the error transfer equation for the positioning algorithm of airborne celestial system. Based on these we built the positioning error model of the celestial navigation. And then, based on the positioning error model we analyze and simulate the positioning error which are caused by the error of the star tracking platform with the MATLAB software. Finally, the positioning error model is verified by the information of the star obtained from the optical measurement device in range and the device whose location are known. The analysis and simulation results show that the level accuracy and north accuracy of tracking platform are important factors that limit airborne celestial navigation systems to improve the positioning accuracy, and the positioning error have an approximate linear relationship with the level error and north error of tracking platform. The error of the verification results are in 1000m, which shows that the model is correct.. &copy; 2015 SPIE.
Number of references:11
Main heading:Navigation systems
Controlled terms:Inertial navigation systems - Linear transformations - Mathematical transformations - MATLAB - Navigation - Optical data processing - Photonics - Stars
Uncontrolled terms:accuracy of level and north - Accuracy of positioning - accuracy of tracking platform - Celestial Navigation System - Integrated navigation systems - Linear coordinate transformation - Linear relationships - Optical measurement devices
Classification code:431.5  Air Navigation and Traffic Control - 657.2  Extraterrestrial Physics and Stellar Phenomena - 712  Electronic and Thermionic Materials - 717  Optical Communication - 741.3  Optical Devices and Systems - 744  Lasers - 921  Mathematics - 921.3  Mathematical Transformations
DOI:10.1117/12.2075874

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 16>

Accession number:20153501209530
Title:Technology research on image motion compensation of the rotating double optical wedge
Authors:Zhao, Junli (1, 2); Wu, Yiming (1, 3); Gao, Limin (1); Zhang, Heng (3); Yin, Xunlong (3); Yao, Zhen (1, 2)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China; (3) Xi'an CAS Photoelectric Precision Engineering Co., Ltd., Xi'an, China
Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering
Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.
Volume:44
Issue:5
Issue date:May 25, 2015
Publication year:2015
Pages:1506-1511
Language:Chinese
ISSN:10072276
Document type:Journal article (JA)
Publisher:Chinese Society of Astronautics
Abstract:Image blur dues to the relative motion with the target in the camera exposure time, it would be worse while the ratio of speed and height (or speed and distance) increased. At present, the optical image motion compensation method bases mainly on the reflective element. In order to overcome the disadvantages of complicated image rotation corrected mechanism, difficult position location and optical vibration occurred by the swing scanning, a new method based on rotating double optical wedge was proposed, the dynamic working matrix was built, the emergent light vector's trajectory was analyzed and simulated. According to the actual image motion compensation demand, the double optical wedge designing result and controlling method were presented. Through analysis and simulation, the results show that this method has significant advantages such as compact structure, easy controlling method, stable motion state, high compensation capacity, etc. It has very important practical value for the occasions of the greater ratio of speed and height (or speed and distance). &copy;, 2015, Chinese Society of Astronautics. All right reserved.
Number of references:8
Main heading:Motion analysis
Controlled terms:Geometrical optics - Motion compensation - Satellite communication systems - Vibration analysis
Uncontrolled terms:Analysis and simulation - Compact structures - Controlling methods - Image motion compensation - Optical matrix - Optical vibrations - Optical wedges - Technology research
Classification code:716  Telecommunication; Radar, Radio and Television - 717  Optical Communication - 718  Telephone Systems and Related Technologies; Line Communications - 741  Light, Optics and Optical Devices - 741.1  Light/Optics - 943.2  Mechanical Variables Measurements

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 17>

Accession number:20153501207782
Title:Wideband slow light in microfiber double-knot resonator with a parallel structure
Authors:Xu, Yi-Ping (1); Ren, Li-Yong (1); Liang, Jian (1); Ma, Cheng-Ju (1); Wang, Ying-Li (1); Kong, Xu-Dong (1); Lin, Xiao (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
Corresponding author:Ren, Li-Yong
Source title:Journal of Applied Physics
Abbreviated source title:J Appl Phys
Volume:118
Issue:7
Issue date:August 21, 2015
Publication year:2015
Article number:073105
Language:English
ISSN:00218979
E-ISSN:10897550
CODEN:JAPIAU
Document type:Journal article (JA)
Publisher:American Institute of Physics Inc.
Abstract:The characteristics of slow light in the microfiber double-knot resonator with a parallel structure are investigated both theoretically and experimentally. It is predicted that a wide bandwidth of about 20 GHz and flat-top group delay of about 70 ps can be generated in this resonator by changing the coupling coefficient. In the experiment, such a resonator was fabricated and the slow-light effect was demonstrated. As a result, when a pulse with a bandwidth of 3.35 GHz (equivalent to the temporal width of 299 ps) was launched into the resonator, a large group delay, whose average value was about 69.4 ps with a flat-top wavelength bandwidth of about 190 pm, was achieved. &copy; 2015 AIP Publishing LLC.
Number of references:30
Main heading:Group delay
Controlled terms:Bandwidth - Resonators - Slow light
Uncontrolled terms:Average values - Coupling coefficient - Large groups - Light effects - Micro-fiber - Parallel structures - Temporal width - Wide bandwidth
Classification code:703.1  Electric Networks - 714  Electronic Components and Tubes - 716.1  Information Theory and Signal Processing - 741.1  Light/Optics
DOI:10.1063/1.4928967

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 18>

Accession number:20150900572893
Title:Efficient object detection by prediction in 3D space
Authors:Pang, Yanwei (1); Jiang, Xiaoheng (1); Li, Xuelong (2); Pan, Jing (3)
Author affiliation:(1) School of Electronic Information Engineering, Tianjin University, Tianjin 300072, PR China; (2) Center for OPTical IMagery Analysis and Learning (OPTIMAL), State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, Shaanxi, PR China; (3) School of Electronic Engineering, Tianjin University of Technology and Education, Tianjin 300222, PR China
Corresponding author:Pang, Yanwei
Source title:Signal Processing
Abbreviated source title:Signal Process
Issue date:March 11, 2014
Publication year:2015
Language:English
ISSN:01651684
CODEN:SPRODR
Document type:Article in Press
Publisher:Elsevier
Abstract:Because the scale, horizontal and vertical coordinates of an object in an image are arbitrary, so object detection can be viewed as a process of searching the object in the 3D space spanned by the scale, horizontal, and vertical factors. Traditional sliding window based method has to exhaustively search and check the 3D space, resulting in prohibitive computation cost. To deal with this problem, in this paper, we propose to explore both the scaling capacity and translation capacity of object detector to accelerate detection speed, without loss of detection accuracy. In our paradigm, scaling capacity can relieve the use of all possible sizes of templates at the first stage, i.e., only a few number of templates that can cover a large range of target object size are used to coarsely find the targets. Similarly, translation capacity can avoid dense grid sampling at the very beginning. After initial estimation, further evaluations with templates of finer scales are carried out around the candidates to verify the existence of target objects. Moreover, different from traditional uniform grid scanning, we present an interlaced scanning method called diamond grid scanning which can reduce redundant evaluation. Experimental results on face detection demonstrate the advantage of our method. &copy; 2014 Elsevier B.V.
Main heading:Object detection
Controlled terms:Face recognition - Object recognition - Scanning
Uncontrolled terms:Computation costs - Detection accuracy - Efficient object detections - Initial estimation - Interlaced scanning - Scaling capacity - Sliding window-based - Vertical coordinates
Classification code:716  Telecommunication; Radar, Radio and Television - 741.3  Optical Devices and Systems
DOI:10.1016/j.sigpro.2014.08.039

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 19>

Accession number:20160401852755
Title:Method for measuring laser spot center based on multi-dimensional reconstruction in integrated diagnostic system
Authors:Wang, Zhengzhou (1, 2, 3); Hu, Bingliang (3); Yin, Qinye (2); Cao, Shikang (3); Li, Dongjian (3); Li, Hongguang (3)
Author affiliation:(1) School of Electronic &amp; Information Engineering, Xi'an Jiaotong University, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China; (3) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering
Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.
Volume:44
Issue date:December 25, 2015
Publication year:2015
Pages:73-79
Language:Chinese
ISSN:10072276
Document type:Journal article (JA)
Publisher:Chinese Society of Astronautics
Abstract:In order to enhance the weak and asymmetrical image of small laser spot and suppress the noise information, eliminate unstable laser spot effect on the calculation results, a new method was proposed in this paper. Firstly, a multi-dimensional image cube was constructed by many images captured in different time, the primary information was concentrated in the first dimensional image, the correlation of each dimensional image was removed. Secondly, the first dimensional image was divided into laser spot and background by Kmeans method, the classified image was processed by mathematical morphology, the edge of largest spot was searched as edge of small laser spot. Finally, the least square method of circle fitting was used to calculate small laser spot center. The experimental results show that the method can improve the accurate rate on checking the weak and asymmetrical laser spot, the binary laser spot area obtained by new method is 97.15% of ideal spot area, the error of small laser spot center and radius is less than 2 pixels, and realize the accuracy measure of small laser spot in the integrated diagnostic system. &copy; 2015, Editorial Board of Journal of Infrared and Laser Engineering. All right reserved.
Number of references:12
Main heading:Least squares approximations
Controlled terms:Mathematical morphology
Uncontrolled terms:Circle fitting - Integrated diagnostics - K-means - Laser spots - Least square methods - MNF - Mult-dimension reconstruct
Classification code:921.6  Numerical Methods

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 20>

Accession number:20152100876209
Title:Switchable dual-wavelength fiber laser mode-locked by monolayer graphene on D-shaped fiber
Authors:Yang, H.R. (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xian Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xian, China
Corresponding author:Yang, H.R.
Source title:Journal of Modern Optics
Abbreviated source title:J. Mod. Opt.
Volume:62
Issue:17
Issue date:October 7, 2015
Publication year:2015
Pages:1363-1367
Language:English
ISSN:09500340
E-ISSN:13623044
CODEN:JMOPEW
Document type:Journal article (JA)
Publisher:Taylor and Francis Ltd.
Abstract:A switchable mode-locking fiber laser is demonstrated by means of a monolayer graphene saturable absorber (SA) based on a D-shaped fiber. The monolayer graphene, which is grown by chemical vapor deposition, is transferred onto the D-shaped fiber and then the light-graphene interaction via the evanescent field of the fiber is enhanced greatly. Using such a graphene-based SA, the single-wavelength mode locking can be switched from 1531.5 to 1559.1 nm by appropriately adjusting the polarization controller (PC). In addition, the stable dual-wavelength mode-locking operation is also observed at the proper state of PC. &copy; 2015 Taylor & Francis.
Number of references:71
Main heading:Mode-locked fiber lasers
Controlled terms:Chemical vapor deposition - Evanescent fields - Fiber lasers - Fibers - Graphene - Laser mode locking - Locks (fasteners) - Monolayers - Saturable absorbers
Uncontrolled terms:D-shaped fiber - Dual-wavelength mode locking - Graphene saturable absorbers - Mode-locked - Mode-locking fiber laser - Polarization controllers - Single wavelength - Switchable dual wavelengths
DOI:10.1080/09500340.2015.1039616

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 21>

Accession number:20151100635593
Title:Real-fringe DASH interferometer for upper atmospheric wind and temperature observation: Concept and simulation
Authors:Fei, Xiaoyun (1, 2); Feng, Yutao (1); Bai, Qinglan (1)
Author affiliation:(1) Xi'an Institute of Optics Precision Mechanic of Chinese Academy of Sciences, Xi'an, Shaanxi, China; (2) University of Chinese Academy of Sciences, Beijing, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9449
Volume title:International Conference on Photonics and Optical Engineering, icPOE 2014
Part number:1 of 1
Issue date:2015
Publication year:2015
Article number:94492S
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628415650
Document type:Conference article (CA)
Conference name:International Conference on Photonics and Optical Engineering, icPOE 2014
Conference date:October 13, 2014  -  October 15, 2014
Conference location:Xi'an, China
Conference code:111356
Sponsor:Optics and Photonics Society of Singapore; Shaanxi Optical Society; Shaanxi Provincial Physical Society
Publisher:SPIE
Abstract:Doppler asymmetric spatial heterodyne spectroscopy (DASH) is a new technology for measuring upper atmospheric winds by observing the Doppler shift of atmospheric emission lines from a satellite using a limb viewing geometry. The real-fringe DASH interferometer is a modification of conventional DASH interferometer; it keeps the advantages of the conventional one. Moreover, this interferometer will not need exit optics to image the superposed fringes onto the detector; it will be more compact and lightweight, making it suitable for space-based platforms. We describe the concept of the new interferometer and present the exact expression of spatial frequency and phase of the interferogram. We also describe design and simulation of a real-fringe DASH interferometer for observation of the O [<sup>1</sup>D] 630nm emission. The simulation results agree with the theory. &copy; 2015 SPIE.
Number of references:7
Main heading:Interferometers
Controlled terms:Photonics - Space platforms
Uncontrolled terms:Atmospheric Winds - DASH - Design and simulation - Limb-viewing geometry - real-fringe - simulation - Spatial heterodyne spectroscopies - Temperature observations
Classification code:655.1  Spacecraft, General - 712  Electronic and Thermionic Materials - 717  Optical Communication - 744  Lasers - 941.3  Optical Instruments
DOI:10.1117/12.2075814

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 22>

Accession number:20152901047212
Title:Tunable multiple phase-coupled plasmoninduced transparencies in graphene metamaterials
Authors:Zeng, Chao (1); Cui, Yudong (1); Liu, Xueming (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
Source title:Optics Express
Abbreviated source title:Opt. Express
Volume:23
Issue:1
Issue date:January 12, 2015
Publication year:2015
Pages:545-551
Language:English
E-ISSN:10944087
Document type:Journal article (JA)
Publisher:Optical Society of American (OSA)
Abstract:We demonstrate the existence of multiple electromagnetically induced transparencies (EIT)-like spectral responses in graphene metamaterials consisting of a series of self-assembled graphene Fabry-P&eacute;rot (FP) cavities. By exploiting the graphene plasmon resonances and phase-coupling effects, the transfer matrix model is established to theoretically predict the EIT-like responses, and the calculated results coincide well with numerical simulations. It is found that high-contrast (&sim;90%) multiple EIT-like windows are observed over a broad range of mid-infrared. Additionally, these optical responses can be efficiently tuned by altering the Fermi level in graphene and the separations of FP cavities. The proposed scheme paves the way toward control of the multiple EIT-like responses, enabling exploration of the on-chip multifunctional electro-optic devices including multi-channel-selective filters, sensors, and modulators. &copy; 2014 Optical Society of America.
Number of references:27
Main heading:Graphene
Controlled terms:Metamaterials - Transfer matrix method - Transparency
Uncontrolled terms:Electromagnetically-induced transparency - Electrooptic devices - Graphene plasmons - Optical response - Selective filters - Self-assembled - Spectral response - Transfer matrix model
Classification code:741.1  Light/Optics - 761  Nanotechnology - 804  Chemical Products Generally - 921  Mathematics - 951  Materials Science
DOI:10.1364/OE.23.000545

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 23>

Accession number:20151800809966
Title:A forming method for improving surface integrity of film cooling holes
Authors:Zhao, Hua-Long (1); Zhou, Ren-Kui (1); Zhao, Hong-Yan (2); Zhao, Wei (1); Zhu, Wen-Yu (1); Yang, Xiao-Jun (1); Li, Ming (1); Deng, Yue (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) School of Foreign Languages, Xi'an International University, Xi'an, China
Source title:Hangkong Dongli Xuebao/Journal of Aerospace Power
Abbreviated source title:Hangkong Dongli Xuebao
Volume:30
Issue:3
Issue date:March 1, 2015
Publication year:2015
Pages:649-655
Language:Chinese
ISSN:10008055
CODEN:HDOXE5
Document type:Journal article (JA)
Publisher:BUAA Press
Abstract:In order to solve the problems of forming process of turbine blade of aero-engine film cooling holes, such as severe heat effect, a helix drilling and spiral drilling processing method for microholes by ultrafast laser was proposed, and a double power laser system was designed for machining of film cooling holes efficiently and without heat effect; the reason of heat effects was analyzed from two aspects of action mechanism and actual machining process; the main influential factors were pointed out and the optimization of process parameters and experimental verification targeting at these factors were processed using DD6 material. The experimental results show that the composite processing method using 500 fs laser and microseconds laser can increase fine drilling efficiency about 10 times, and can also process the film cooling holes on turbine blades without recast layer and micro-cracks; the process parameters include beam scanning speed of 2400 r/min, overlap rate of 12%, feeding amount of 5 &mu;m, repetition frequency of 20 kHz and coaxial blow with the air pressure of 0.6 Pa. They also show that ultrafast laser with reasonable process parameters and processing methods can process film cooling holes without heat effects, so it is an effective technological method to improve the surface integrity of film cooling holes. &copy;, 2015, BUAA Press. All right reserved.
Number of references:18
Main heading:Laser materials processing
Controlled terms:Aircraft engines - Atmospheric pressure - Cooling - Cracks - Crystallization - Processing - Turbine components - Turbines - Turbomachine blades - Ultrafast lasers
Uncontrolled terms:Macro-cracks - Pulsewidths - Recast layer - Repetition frequency - Surface integrity
Classification code:421  Strength of Building Materials; Mechanical Properties - 443.1  Atmospheric Properties - 617  Turbines and Steam Turbines - 618  Compressors and Pumps - 641.2  Heat Transfer - 653.1  Aircraft Engines, General - 744.1  Lasers, General - 744.9  Laser Applications - 913.4  Manufacturing - 933.1  Crystalline Solids
DOI:10.13224/j.cnki.jasp.2015.03.015

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 24>

Accession number:20152300916639
Title:Optical system design for infrared target simulator
Authors:Song, Yansong (1, 2); Yang, Jianfeng (1); Zhao, Yiyi (1, 2); Yan, Xingtao (1); Ma, Xiaolong (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; Shaanxi, China; (2) University of Chinese Academy of Sciences, Beijing, China
Corresponding author:Song, Yansong
Source title:Guangxue Xuebao/Acta Optica Sinica
Abbreviated source title:Guangxue Xuebao
Volume:35
Issue:4
Issue date:April 10, 2015
Publication year:2015
Article number:0422007
Language:Chinese
ISSN:02532239
CODEN:GUXUDC
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:A new common-path scheme for infrared target simulator is proposed in order to simplify the structure of infrared target simulator. Based on this scheme, a dual-channel infrared projection system with compacted structure is designed. The optical system is characterized by the system field angle of &plusmn;3&deg;, the spectral band of 3~5 &mu;m, the entrance pupil distance of 550 mm, the focal length of 220 mm and the F number of 3.67. After analyzing the reason why the structure of the previous infrared target simulator is complex and the influence of different forms of interference target simulator structure on the design of common-path system, a good solution is given with combination of blackbody source and scanning mirror as interference target source. Through theoretical study of the influence of scanning mirror on the system performance, the feasibility of this scheme is proved. The results show that the modulation transfer function of the main target channel is better than 0.5 at the field of 16lp/mm, the root mean square (RMS) radius of each channel is less than 18 &mu;m, and the distortion is less than 1%. The system can meet the requirements of minus 10  to 40  working environment by focusing. &copy;, 2015, Chinese Optical Society. All right reserved.
Number of references:10
Page count:8
Main heading:Simulators
Controlled terms:Mirrors - Optical design - Optical systems - Scanning
Uncontrolled terms:Blackbody - Blackbody sources - Dual channel - Infrared projection - Infrared target - Scanning mirror - Target simulators - Working environment
Classification code:621  Nuclear Reactors - 671  Naval Architecture - 741.1  Light/Optics - 741.3  Optical Devices and Systems
DOI:10.3788/AOS201535.0422007

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 25>

Accession number:20153601250796
Title:Study on properties of speckle field formed by Laguerre-Gaussian beam illumination
Authors:Li, Xinzhong (1, 2); Tian, Xiaomin (1); Wang, Hui (1); Tang, Jie (2); Wang, Yishan (2); Nie, Zhaogang (3); Li, Hehe (1); Wang, Jingge (1)
Author affiliation:(1) School of Physics &amp; Engineering, Henan University of Science &amp; Technology, Luoyang; Henan, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; Shaanxi, China; (3) School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, Singapore
Source title:Guangxue Xuebao/Acta Optica Sinica
Abbreviated source title:Guangxue Xuebao
Volume:35
Issue:7
Issue date:July 10, 2015
Publication year:2015
Article number:0726001
Language:Chinese
ISSN:02532239
CODEN:GUXUDC
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:The properties of speckle field is studied when Laguerre-Gaussian (LG) beams illuminate a ground glass plate. The LG vortex beams are generated by a spatial light modulator combing with computer-generated hologram. The relation of speckle size and azimuthal and radial indices and the bright region of the LG beams are analyzed experimentally. Experimental results show that the speckle size decreases linearly with the azimuthal index increasing for certain radial index. Similarly, the speckle size also decreases with the radial index increasing for certain azimuthal index. Moreover, the speckle size is proportional to the negative factor of illuminating area of the LG beam. Further, the negative factor is gradual close to the results of Gaussian beam illuminating with the increasing radial index. &copy;, 2015, Chinese Optical Society. All right reserved.
Number of references:22
Page count:7
Main heading:Gaussian beams
Controlled terms:Computer generated holography - Electron holography - Gaussian distribution - Glass - Light modulators - Physical optics - Speckle - Vortex flow
Uncontrolled terms:Azimuthal index - Computer generated holograms - Ground glass - Laguerre Gaussian beams - Laguerre-Gaussian beam - Spatial light modulators - Speckle field - Vortex beams
Classification code:631.1  Fluid Flow, General - 711  Electromagnetic Waves - 723.5  Computer Applications - 741.1  Light/Optics - 741.3  Optical Devices and Systems - 812.3  Glass - 922.1  Probability Theory - 932  High Energy Physics; Nuclear Physics; Plasma Physics
DOI:10.3788/AOS201535.0726001

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 26>

Accession number:20143600019053
Title:Evolutionary compact embedding for large-scale image classification
Authors:Liu, Li (1, 2); Shao, Ling (1, 2); Li, Xuelong (3)
Author affiliation:(1) College of Electronic and Information Engineering, Nanjing University of Information Science and Technology, Nanjing, Jiangsu, China; (2) Department of Electronic and Electrical Engineering, University of Sheffield, Sheffield, United Kingdom; (3) State Key Laboratory of Transient Optics and Photonics, XIOPM, Chinese Academy of Sciences, Xi'an, Shannxi, China
Corresponding author:Shao, Ling
Source title:Information Sciences
Abbreviated source title:Inf Sci
Volume:316
Issue date:September 20, 2015
Publication year:2015
Pages:567-581
Language:English
ISSN:00200255
CODEN:ISIJBC
Document type:Journal article (JA)
Publisher:Elsevier Inc.
Abstract:Effective dimensionality reduction is a classical research area for many large-scale analysis tasks in computer vision. Several recent methods attempt to learn either graph embedding or binary hashing for fast and accurate applications. In this paper, we propose a novel framework to automatically learn the task-specific compact coding, called evolutionary compact embedding (ECE), which can be regarded as an optimization algorithm combining genetic programming (GP) and a boosting trick. As an evolutionary computation methodology, GP can solve problems inspired by natural evolution without any prior knowledge of the solutions. In our evolutionary architecture, each bit of ECE is iteratively computed using a binary classification function, which is generated through GP evolving by jointly minimizing its empirical risk with the AdaBoost strategy on a training set. We address this as greedy optimization leading to small Hamming distances for similar samples and large distances for dissimilar samples. We then evaluate ECE on four image datasets: USPS digital hand-writing, CMU PIE face, CIFAR-10 tiny image and SUN397 scene, showing the accurate and robust performance of our method for large-scale image classification. &copy; 2015 Elsevier Inc. All rights reserved.
Number of references:40
Main heading:Image classification
Controlled terms:Adaptive boosting - Algorithms - Bins - Classification (of information) - Computer vision - Genetic algorithms - Genetic programming - Hamming distance - Iterative methods - Optimization
Uncontrolled terms:Binary classification - Compact embedding - Dimensionality reduction - Evolutionary architectures - Greedy optimization - Large-scale analysis - Optimization algorithms - Robust performance
Classification code:694.4  Storage - 716  Telecommunication; Radar, Radio and Television - 716.1  Information Theory and Signal Processing - 723  Computer Software, Data Handling and Applications - 921.5  Optimization Techniques - 921.6  Numerical Methods
DOI:10.1016/j.ins.2014.06.030

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 27>

Accession number:20152701009082
Title:Graded index porous optical fibers - dispersion management in terahertz range
Authors:Ma, Tian (1, 2); Markov, Andrey (1); Wang, Lili (2); Skorobogatiy, Maksim (1)
Author affiliation:(1) Ecole Polytechnique de Montreal, Montreal; QC, Canada; (2) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an, Shannxi, China
Source title:CLEO: QELS - Fundamental Science, CLEO_QELS 2015
Abbreviated source title:CLEO: QELS - Fundam. Sci., CLEO_QELS 2015
Issue date:May 4, 2015
Publication year:2015
Pages:1551p
Language:English
ISBN-13:9781557529688
Document type:Conference article (CA)
Conference name:CLEO: QELS - Fundamental Science, CLEO_QELS 2015
Conference date:May 10, 2015  -  May 15, 2015
Conference location:San Jose, CA, United states
Publisher:Optical Society of America (OSA)
Abstract:Graded index porous fiber incorporating an air-hole array featuring variable air-hole diameters and inter-hole separations is proposed. We experimentally demonstrate smaller pulse distortion, larger bandwidth and higher excitation efficiency compared to fibers with uniform porosity. &copy; OSA 2015.
Number of references:4
Main heading:Optical fibers
Uncontrolled terms:Air holes - Air-hole arrays - Dispersion management - Excitation efficiency - Graded index - Porous fibers - Pulse distortion - Terahertz range
Classification code:741.1.2  Fiber Optics
DOI:10.1364/CLEO_AT.2015.JW2A.56

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 28>

Accession number:20151200654309
Title:A novel visual codebook model based on fuzzy geometry for large-scale image classification
Authors:Li, Yanshan (1); Huang, Qinghua (2, 3); Xie, Weixin (1); Li, Xuelong (4)
Author affiliation:(1) ATR National Key Laboratory of Defense Technology, Shenzhen University, Shenzhen, China; (2) School of Electronic and Information Engineering, South China University of Technology, Guangzhou, China; (3) National Engineering Research Center for Tissue Restoration and Reconstruction, Guangzhou, China; (4) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, Shaanxi, China
Corresponding author:Huang, Qinghua
Source title:Pattern Recognition
Abbreviated source title:Pattern Recogn.
Volume:48
Issue:10
Issue date:October 1, 2015
Publication year:2015
Pages:3125-3134
Language:English
ISSN:00313203
CODEN:PTNRA8
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:The codebook model has been developed as an effective means for image classification. However, the inherent operation of assigning visual words to image feature vectors in traditional codebook approaches causes serious ambiguities in image classification. In particular, the nearest word may not be the best fit to a feature, and multiple words may be equally appropriate for one specific feature. To resolve these ambiguities, we propose a novel visual codebook model based on the n-dimensional fuzzy geometry (n-D FG) theory, where all visual words and features are modeled as fuzzy points in the n-D FG space, and appropriate uncertainty is introduced to each fuzzy point to enhance the representation capacity. This n-D FG-codebook model not only inherits advantages from the fuzzy set theory, but also facilitates the analysis and determination of the relationship between visual words and features in geometric form. By explicitly taking into account the ambiguities, we propose a novel measure of similarity between the visual words and fuzzy features. Following the proposed codebook model and the novel similarity measure, we develop two useful image classification algorithms by modifying popular image coding algorithms (i.e. SPM and LLC). Finally, experimental results demonstrate that the classification accuracy of the proposed algorithms is dramatically improved for a standard large-scale image database. For example, with a codebook size of 256, the proposed algorithms achieve similar performance as traditional algorithms with a codebook size of 1024, indicating that the proposed algorithms reduce the computational cost by 75% while achieving almost identical classification accuracy to traditional algorithms. Thus, the proposed algorithms represent a more efficient and appropriate scheme for big image data. &copy; 2015 Elsevier Ltd. All rights reserved.
Number of references:47
Main heading:Image classification
Controlled terms:Algorithms - Classification (of information) - Computation theory - Fuzzy set theory - Fuzzy sets - Geometry - Image coding - Set theory
Uncontrolled terms:Classification accuracy - Codebooks - Computational costs - Fuzzy geometries - Image classification algorithms - Image coding algorithms - Measure of similarities - Similarity measure
DOI:10.1016/j.patcog.2015.02.010

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 29>

Accession number:20151800809876
Title:Measurement of azimuth by using new polarizer
Authors:Xiao, Maosen (1); Li, Chunyan (1, 2); Wu, Yiming (1); Lu, Weiguo (1); Wang, Haixia (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China
Corresponding author:Li, Chunyan
Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering
Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.
Volume:44
Issue:2
Issue date:February 25, 2015
Publication year:2015
Pages:611-615
Language:Chinese
ISSN:10072276
Document type:Journal article (JA)
Publisher:Chinese Society of Astronautics
Abstract:In order to achieve azimuth accurate measurement of polarizer axis in the polarization signal generating unit, a device and its working principle were introduced with the use of magneto-optical modulation, right-angled prism and autocollimator to elicit the axis azimuth, and the ordinary polarization prism problems were pointed out. A new type of polarization device was designed based on Glan-Taylor prism to solve this problem, it uses three calcite crystals with identical material composition, each side can form a Glan-Taylor prism respectively with the middle, that it can be a analyzer when it is turned 180&deg; around; the working principle of the device and installation and ways of working were described in detail, that the new component can eliminate the prism manufacture and installation errors in the work process was analyzed, it can complete polarizer axis azimuth determination. Finally, experiment results verify that the angle measurement precision of the device is 0.5&Prime;, and the system has characteristics of high stability, precision and operability, and so on. &copy;, 2015, Chinese Society of Astronautics. All right reserved.
Number of references:10
Main heading:Prisms
Controlled terms:Light modulation - Modulation - Optical instruments - Polarization
Uncontrolled terms:Accurate measurement - Autocollimation - Identical materials - Installation error - Magneto-optical - Measurement precision - Polarization devices - Polarization signals
Classification code:716  Telecommunication; Radar, Radio and Television - 717  Optical Communication - 718  Telephone Systems and Related Technologies; Line Communications - 741.1  Light/Optics - 741.3  Optical Devices and Systems

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 30>

Accession number:20151100635571
Title:The investigation of automatic exposure under extreme light
Authors:Wang, Zefeng (1); Yang, Lei (1); Huang, Jijang (1); Zhang, Zhi (1); Xie, Qingsheng (1); Chen, Yaohong (1); Liao, Jiawen (1); Zhang, Zhaohui (1); Zhang, Haifeng (1); Zhang, Kaisheng (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics Chinese Academy of Sciences, Xi'an, Shaanxi Province, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9449
Volume title:International Conference on Photonics and Optical Engineering, icPOE 2014
Part number:1 of 1
Issue date:2015
Publication year:2015
Article number:94491W
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628415650
Document type:Conference article (CA)
Conference name:International Conference on Photonics and Optical Engineering, icPOE 2014
Conference date:October 13, 2014  -  October 15, 2014
Conference location:Xi'an, China
Conference code:111356
Sponsor:Optics and Photonics Society of Singapore; Shaanxi Optical Society; Shaanxi Provincial Physical Society
Publisher:SPIE
Abstract:For imaging equipments, exposure is one of the crucial factors for evaluating the quality of imaging. The correct method of exposure is the key to obtain high-quality image. Traditional calculation of exposure is slow in adaptation under extreme environment. In addition, the object of imaging under extreme light usually cannot achieve suitable gray level. To obtain accurate and effective control of automatic exposure under back light and front light environment, this article divides shoot scenes into different regions, applying the method of fuzzy logic to give each region a different weight number, and finally allowing it to correctly carry out automatic exposure. This method can manage imaging under special light conditions without being affected by the position of the main object. Experiments show that this method can effectively control automatic exposure under all kinds of environments. &copy; 2015 SPIE.
Number of references:5
Main heading:Fuzzy logic
Controlled terms:Carry logic - Photonics
Uncontrolled terms:Extreme environment - High quality images - Imaging equipment - Intensity histograms - Light conditions - Light environment - Weight functions - Weight numbers
Classification code:712  Electronic and Thermionic Materials - 717  Optical Communication - 721.1  Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory - 744  Lasers
DOI:10.1117/12.2074827

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 31>

Accession number:20155101678612
Title:Yb-doped passively mode-locked fiber laser with Bi<inf>2</inf>Te<inf>3</inf>-deposited
Authors:Li, Lu (1, 3, 4); Yan, Pei-Guang (2); Wang, Yong-Gang (1); Duan, Li-Na (1, 4); Sun, Hang (1); Si, Jin-Hai (3)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) Shenzhen Key Laboratory of Engineering, Shenzhen University, Shenzhen, China; (3) Key Laboratory for Physical Electronics and Devices, Ministry of Education and Shaanxi, Key Laboratory of Information Photonic Technique, School of Electronic and Information Engineering, Xi'An Jiaotong University, Xi'an, China; (4) University of Chinese Academy of Sciences (CAS), Beijing, China
Corresponding author:Wang, Yong-Gang(chinawygxjw@opt.ac.cn)
Source title:Chinese Physics B
Abbreviated source title:Chin. Phys.
Volume:24
Issue:12
Issue date:October 20, 2015
Publication year:2015
Article number:124204
Language:English
ISSN:16741056
Document type:Journal article (JA)
Publisher:Institute of Physics Publishing
Abstract:In this study we present an all-normal-dispersion Yb-doped fiber laser passively mode-locked with topological insulator (Bi<inf>2</inf>Te<inf>3</inf>) saturable absorber. The saturable absorber device is fabricated by depositing Bi<inf>2</inf>Te<inf>3</inf>on a tapered fiber through using pulsed laser deposition (PLD) technology, which can give rise to less non-saturable losses than most of the solution processing methods. Owing to the long interaction length, Bi<inf>2</inf>Te<inf>3</inf>is not exposed to high optical power, which allows the saturable absorber device to work in a high power regime. The modulation depth of this kind of saturable absorber is measured to be 10%. By combining the saturable absorber device with Yb-doped fiber laser, a mode-locked pulse operating at a repetition rate of 19.8 MHz is achieved. The 3-dB spectral width and pulse duration are measured to be 1.245 nm and 317 ps, respectively. &copy; 2015 Chinese Physical Society and IOP Publishing Ltd.
Number of references:30
Main heading:Mode-locked fiber lasers
Controlled terms:Deposition - Electric insulators - Fiber lasers - Fibers - Passive mode locking - Pulse repetition rate - Pulsed laser deposition - Pulsed lasers - Saturable absorbers - Semiconductor quantum wells  - Ytterbium
Uncontrolled terms:All normal dispersions - High optical power - Mode-locked laser - Passively mode-locked - Passively mode-locked fiber lasers - Solution-processing - Topological insulators - Yb doped fiber laser
Classification code:547.2  Rare Earth Metals - 714.2  Semiconductor Devices and Integrated Circuits - 744  Lasers - 802.3  Chemical Operations
DOI:10.1088/1674-1056/24/12/124204

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 32>

Accession number:20154801632082
Title:Digital holographic shape measurement using Fizeau microscopy
Authors:Abdelsalam, D.G. (1, 2); Min, Junwei (1); Kim, Daesuk (3); Yao, Baoli (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) Engineering and Surface Metrology Laboratory, National Institute of Standards, Tersa St., El haram, El Giza, Egypt; (3) Division of Mechanical System Engineering, Chonbuk National University, Jeonju, Korea, Republic of
Corresponding author:Abdelsalam, D.G.(dahi.abdelsalam@nis.sci.eg)
Source title:Chinese Optics Letters
Abbreviated source title:Chin. Opt. Lett.
Volume:13
Issue:10
Issue date:October 10, 2015
Publication year:2015
Article number:100701
Language:English
ISSN:16717694
Document type:Journal article (JA)
Publisher:Science Press
Abstract:We present a Fizeau interferometer using a microscopic objective as a tool for surface contouring without the need for a numerical lens for reconstruction. The interferometer is associated with a telescope system to feature the object with collimated light. The experiment is conducted on two objects possessing different step heights. The phase maps from the captured off-axis holograms are calculated numerically, which allows us to deduce the contours of the objects. The great advantages of the presented technique are that it can be done in real time and there is no need for numerical lenses for micro-objects reconstruction. &copy; 2015 Chinese Optics Letters.
Number of references:21
Page count:5
Main heading:Holograms
Controlled terms:Interferometers - Laser optics
Uncontrolled terms:Collimated light - Fizeau interferometers - Micro-objects - Phase maps - Shape measurements - Step height - Surface contouring - Telescope system
Classification code:741.1  Light/Optics - 743  Holography - 941.3  Optical Instruments
DOI:10.3788/COL201513.100701

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 33>

Accession number:4595196
Title:Substance dependence constrained sparse NMF for hyperspectral unmixing
Authors:Yuan, Yuan (1); Fu, Min (1); Lu, Xiaoqiang (1)
Author affiliation:(1) Center for OPTical IMagery Analysis and Learning, State Key Laboratory of Transient Optics and Photonics, Xian Institute of Optics and Precision Mechanics, Xian, China
Source title:IEEE Transactions on Geoscience and Remote Sensing
Abbreviated source title:IEEE Trans Geosci Remote Sens
Volume:53
Issue:6
Issue date:June 1, 2015
Publication year:2015
Pages:2975-2986
Article number:7008501
Language:English
ISSN:01962892
CODEN:IGRSD2
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:Hyperspectral unmixing is one of the most important problems in analyzing remote sensing images, which aims to decompose a mixed pixel into a collection of constituent materials named endmembers and their corresponding fractional abundances. Recently, various methods have been proposed to incorporate sparse constraints into hyperspectral unmixing and achieve advanced performance. However, most of them ignore the complex distribution of substances in hyperspectral data so that they are only effective in limited cases. In this paper, the concept of substance dependence is introduced to help hyperspectral unmixing. Generally, substance dependence can be considered in a local region by K-nearest neighbors method. However, since substances of hyperspectral images are complicatedly distributed, number K of the most similar substances to each substance is difficult to decide. In this case, substance dependence should be considered in the whole data space, and the number of the K most similar substances to each substance can be adaptively determined by searching from the whole space. Through maintaining the substance dependence during unmixing, the abundances resulted from the proposed method are closer to the real fractions, which lead to better unmixing performance. The following contributions can be summarized. 1) The concept of substance dependence is proposed to describe the complicated relationship between substances in the hyperspectral image. 2) We propose substance dependence constrained sparse nonnegative matrix factorization (SDSNMF) for hyperspectral unmixing. Using SDSNMF, we meet or exceed state-of-the-art unmixing performance. 3) Adequate experiments on both synthetic and real hyperspectral data have been tested. Compared with the state-of-the-art methods, the experimental results prove the superiority of the proposed method. &copy; 2015 IEEE.
Number of references:52
Controlled terms:data set - image analysis - pixel - remote sensing - spectral analysis
Classification code:71.8.5.4  Remote sensing: numerical and image analysis
DOI:10.1109/TGRS.2014.2365953

Database:GEOBASE
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 34>

Accession number:20152200894482
Title:Blind image quality assessment via deep learning
Authors:Hou, Weilong (1); Gao, Xinbo (1); Tao, Dacheng (2); Li, Xuelong (3)
Author affiliation:(1) School of Electronic Engineering, Xidian University, 2 South Taibai Road, Xi'an, Shaanxi, China; (2) Ctr. for Quant. Computation and Intelligent Syst. and the Fac. of Eng. and Information Technology, University of Technology, Sydney, 235 Jones Street, Ultimo; NSW, Australia; (3) Center for OPTical IMagery Analysis and Learning (OPTIMAL), Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, Shaanxi, China
Source title:IEEE Transactions on Neural Networks and Learning Systems
Abbreviated source title:IEEE Trans. Neural Networks Learn. Sys.
Volume:26
Issue:6
Issue date:June 1, 2015
Publication year:2015
Pages:1275-1286
Article number:6872541
Language:English
ISSN:2162237X
E-ISSN:21622388
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:This paper investigates how to blindly evaluate the visual quality of an image by learning rules from linguistic descriptions. Extensive psychological evidence shows that humans prefer to conduct evaluations qualitatively rather than numerically. The qualitative evaluations are then converted into the numerical scores to fairly benchmark objective image quality assessment (IQA) metrics. Recently, lots of learning-based IQA models are proposed by analyzing the mapping from the images to numerical ratings. However, the learnt mapping can hardly be accurate enough because some information has been lost in such an irreversible conversion from the linguistic descriptions to numerical scores. In this paper, we propose a blind IQA model, which learns qualitative evaluations directly and outputs numerical scores for general utilization and fair comparison. Images are represented by natural scene statistics features. A discriminative deep model is trained to classify the features into five grades, corresponding to five explicit mental concepts, i.e., excellent, good, fair, poor, and bad. A newly designed quality pooling is then applied to convert the qualitative labels into scores. The classification framework is not only much more natural than the regression-based models, but also robust to the small sample size problem. Thorough experiments are conducted on popular databases to verify the model's effectiveness, efficiency, and robustness. &copy; 2012 IEEE.
Number of references:43
Main heading:Quality control
Controlled terms:Benchmarking - Classification (of information) - Computational linguistics - Face recognition - Image quality - Linguistics - Mapping
Uncontrolled terms:Classification framework - Deep learning - Image quality assessment - Image quality assessment (IQA) - Natural scene statistics - No references - Objective image quality assessment - Small sample size problems
Classification code:716  Telecommunication; Radar, Radio and Television - 716.1  Information Theory and Signal Processing - 721.1  Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory - 741  Light, Optics and Optical Devices - 902.1  Engineering Graphics - 903.1  Information Sources and Analysis - 903.2  Information Dissemination - 912  Industrial Engineering and Management - 913  Production Planning and Control; Manufacturing - 913.3  Quality Assurance and Control
DOI:10.1109/TNNLS.2014.2336852

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 35>

Accession number:20154201387533
Title:Tunable photonic nanojet formed by generalized Luneburg lens
Authors:Mao, Xiurun (1); Yang, Yang (2); Dai, Haitao (1); Luo, Dan (3); Yao, Baoli (4); Yan, Shaohui (4)
Author affiliation:(1) Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, School of Science, Tianjin University, Tianjin, China; (2) Department of Physics, College of Science, Tianjin University of Technology, Tianjin, China; (3) Department of Electrical and Electronic Engineering, South University of Science and Technology of China, Shenzhen, China; (4) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
Source title:Optics Express
Abbreviated source title:Opt. Express
Volume:23
Issue:20
Issue date:October 5, 2015
Publication year:2015
Pages:26426-26433
Language:English
E-ISSN:10944087
Document type:Journal article (JA)
Publisher:OSA - The Optical Society
Abstract:Nanojet has been emerging as an interesting topic in variety photonics applications. In this paper, inspired by the properties of generalized Luneburg lens (GLLs), a two-dimensional photonic nanojet system has been developed, which focal distance can be tuned by engineering the refractive index profile of GLLs. Simulation and analysis results show that the maximum light intensity, transverse and longitudinal dimensions of the photonic nanojet are dependent on the focal distance of the GLLs, thereby, by simply varying the focal distance, it is possible to obtain localized photon fluxes with different power characteristics and spatial dimensions. This can be of interest for many promising applications, such as high-resolution optical detection, optical manipulation, technology of direct-write nano-patterning and nano-lithography. &copy; 2015 Optical Society of America &copy; 2015 OSA.
Number of references:32
Main heading:Nanophotonics
Controlled terms:Nanolithography - Refractive index
Uncontrolled terms:Longitudinal dimension - Optical detection - Optical manipulation - Photonics applications - Power characteristic - Refractive index profiles - Simulation and analysis - Spatial dimension
Classification code:741.1  Light/Optics - 761  Nanotechnology - 933  Solid State Physics
DOI:10.1364/OE.23.026426

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 36>

Accession number:20151000604993
Title:Accurate normal and reflectance recovery using energy optimization
Authors:Luo, Tao (1); Shen, Jianbing (1); Li, Xuelong (2)
Author affiliation:(1) Beijing Key Laboratory of Intelligent Information Technology, School of Computer Science, Beijing Institute of Technology, Beijing, China; (2) State Key Laboratory of Transient Optics and Photonics, Center for Optical Imagery Analysis and Learning, Chinese Academy of Sciences, Xian, China
Corresponding author:Shen, Jianbing
Source title:IEEE Transactions on Circuits and Systems for Video Technology
Abbreviated source title:IEEE Trans Circuits Syst Video Technol
Volume:25
Issue:2
Issue date:February 1, 2015
Publication year:2015
Pages:212-224
Article number:6846305
Language:English
ISSN:10518215
CODEN:ITCTEM
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:In this paper, we propose a novel energy optimization framework to accurately estimate surface normal and reflectance of an object from an input image sequence. Input images are captured from a fixed viewpoint under varying lighting conditions. In the proposed approach we combine photometric stereo and Retinex constraints into our energy function. To formulate inter-image constraints, shading information is added to the Lambertian model to account for shadows. For intra-image constraints, we moderate the strength of shading smoothness according to shadow mask and normal variations. By minimizing this energy function we are able to recover accurate surface normals and reflectance. Experimental results show that our approach yields more realistic normal map and accurate albedo map than the state-of-the-art uncalibrated photometric stereo algorithms. As for intrinsic image decomposition, results on the real and synthetic scenes show that the proposed approach outperforms previous ones. &copy; 1991-2012 IEEE.
Number of references:54
Main heading:Reflection
Controlled terms:Face recognition - Photometry - Recovery
Uncontrolled terms:Energy functions - Energy optimization - Intrinsic images - Lambertian model - Normal variations - Photometric stereo - Reflectance recovery - State of the art
Classification code:531  Metallurgy and Metallography - 711  Electromagnetic Waves - 716  Telecommunication; Radar, Radio and Television - 941.4  Optical Variables Measurements
DOI:10.1109/TCSVT.2014.2333991

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 37>

Accession number:20151100627711
Title:Four-phase closure algorithm for coherent field imaging
Authors:Cao, Bei (1); Luo, Xiu-Juan (1); Si, Qing-Dan (1); Zeng, Zhi-Hong (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an, China
Corresponding author:Cao, Bei
Source title:Wuli Xuebao/Acta Physica Sinica
Abbreviated source title:Wuli Xuebao
Volume:64
Issue:5
Issue date:March 5, 2015
Publication year:2015
Article number:054204
Language:Chinese
ISSN:10003290
CODEN:WLHPAR
Document type:Journal article (JA)
Publisher:Institute of Physics, Chinese Academy of Sciences
Abstract:According to the realization principle of phase closure in coherent field imaging, a new four-phase closure (FPC) algorithm is proposed for T-array multi-beam transmitter system. A type of four-item measurement radio of closure phase is first defined, and then the validity of FPC is confirmed in cancelling out the random atmospheric phase aberrations as well as eliminating atmospheric scintillation effect on degradation of the reconstructed image. Simulations prove the effectiveness of FPC, providing a new approach in removing atmospheric aberrations for multi-beam coherence field imaging. &copy;, 2015, Institute of Physics, Chinese Academy of Sciences. All right reserved.
Number of references:12
Main heading:Image reconstruction
Controlled terms:Algorithms - Image processing - Scintillation
Uncontrolled terms:Atmospheric aberration - Atmospheric scintillation - Coherent fields - New approaches - Phase aberrations - Phase closure - Realization principle - Reconstructed image
Classification code:723  Computer Software, Data Handling and Applications - 741  Light, Optics and Optical Devices - 741.1  Light/Optics - 921  Mathematics
DOI:10.7498/aps.64.054204

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 38>

Accession number:20160801975745
Title:Detection of angular tracing precision of rotating mirror house in streak camera
Authors:Zhao, Huai-Xue (1); Zhao, Jian-Ke (1); Tian, Liu-De (1, 2); Xue, Xun (1); Pan, Liang (1); Duan, Jiong (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China
Corresponding author:Zhao, Huai-Xue(zhaohuaixue@opt.ac.cn)
Source title:Guangxue Jingmi Gongcheng/Optics and Precision Engineering
Abbreviated source title:Guangxue Jingmi Gongcheng
Volume:23
Issue:12
Issue date:December 1, 2015
Publication year:2015
Pages:3303-3308
Language:Chinese
ISSN:1004924X
CODEN:GJGOF4
Document type:Journal article (JA)
Publisher:Chinese Academy of Sciences
Abstract:On the basis of the theoretic deduction and corresponding reasonable assumption, a mathematic model was built according to the flight model of exterior trajectory to improve the angular tracing precision of rotating mirror house in a streak camera. A test device was designed and developed for the angular tracing precision of rotating mirror house in the streak camera. The measuring principle of the test device was introduced, the angular tracing precision was measured by the developed device and the uncertainty factors of the tested device were analyzed. The tested results show that the angular tracing precision of the high speed rotating mirror in the streak camera is (0.34&plusmn;0.06)&deg;, the relative uncertainty of the tested device is 3.0&Prime; and the main error sources come from interpretation and servo control. It concludes that the tested device designed has higher precision and reliability. &copy; 2015, Science Press. All right reserved.
Number of references:19
Main heading:Mirrors
Controlled terms:High speed photography - Houses - Optical testing - Streak cameras - Uncertainty analysis
Uncontrolled terms:Exterior trajectories - High-speed rotating - Main error sources - Mathematic model - Measurement uncertainty - Precision detections - Relative uncertainty - Uncertainty factors
Classification code:402.3  Residences - 741.3  Optical Devices and Systems - 742.1  Photography - 742.2  Photographic Equipment - 922.1  Probability Theory
DOI:10.3788/OPE.20152312.3303

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 39>

Accession number:20154201387038
Title:Learning to Rank for Blind Image Quality Assessment
Authors:Gao, Fei (1); Tao, Dacheng (2); Gao, Xinbo (3); Li, Xuelong (4)
Author affiliation:(1) Video and Image Processing System Laboratory, School of Electronic Engineering, Xidian University, Xi'an, China; (2) Centre for Quantum Computation and Intelligent Systems, Faculty of Engineering and Information Technology, University of Technology, 235 Jones Street, Sydney, Ultimo; NSW, Australia; (3) State Key Laboratory of Integrated Services Networks, School of Electronic Engineering, Xidian University, Xi'an, China; (4) Center for OPTical IMagery Analysis and Learning (OPTIMAL), State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, Shaanxi, China
Source title:IEEE Transactions on Neural Networks and Learning Systems
Abbreviated source title:IEEE Trans. Neural Networks Learn. Sys.
Volume:26
Issue:10
Issue date:October 1, 2015
Publication year:2015
Pages:2275-2290
Article number:7014257
Language:English
ISSN:2162237X
E-ISSN:21622388
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:Blind image quality assessment (BIQA) aims to predict perceptual image quality scores without access to reference images. State-of-the-art BIQA methods typically require subjects to score a large number of images to train a robust model. However, subjective quality scores are imprecise, biased, and inconsistent, and it is challenging to obtain a large-scale database, or to extend existing databases, because of the inconvenience of collecting images, training the subjects, conducting subjective experiments, and realigning human quality evaluations. To combat these limitations, this paper explores and exploits preference image pairs (PIPs) such as the quality of image I<inf>a</inf>is better than that of image I<inf>b</inf>for training a robust BIQA model. The preference label, representing the relative quality of two images, is generally precise and consistent, and is not sensitive to image content, distortion type, or subject identity; such PIPs can be generated at a very low cost. The proposed BIQA method is one of learning to rank. We first formulate the problem of learning the mapping from the image features to the preference label as one of classification. In particular, we investigate the utilization of a multiple kernel learning algorithm based on group lasso to provide a solution. A simple but effective strategy to estimate perceptual image quality scores is then presented. Experiments show that the proposed BIQA method is highly effective and achieves a performance comparable with that of state-of-the-art BIQA algorithms. Moreover, the proposed method can be easily extended to new distortion categories. &copy; 2012 IEEE.
Number of references:59
Main heading:Image quality
Controlled terms:Learning algorithms - Military photography - Quality control
Uncontrolled terms:Image quality assessment (IQA) - Learning preferences - Learning to rank - Multiple Kernel Learning - universal blind IQA (BIQA)
Classification code:404.1  Military Engineering - 913.3  Quality Assurance and Control
DOI:10.1109/TNNLS.2014.2377181

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 40>

Accession number:20160101753540
Title:Detection ability analysis of ground based imaging polarization detector
Authors:Yao, Dalei (1, 2, 3); Wen, Desheng (1); Xue, Jianru (3); Qiu, Yuehong (1); Xi, Jiangbo (1, 2); Wen, Yan (1); Chen, Zhi (1)
Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics of CAS, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China; (3) Xi'An Jiaotong University, Xi'an, China
Corresponding author:Yao, Dalei(ydl198206@sina.com)
Source title:Optik
Abbreviated source title:Optik
Volume:126
Issue:23
Issue date:2015
Publication year:2015
Pages:4771-4774
Language:English
ISSN:00304026
Document type:Journal article (JA)
Publisher:Elsevier GmbH
Abstract:A ground based imaging polarization detector for astronomical observation is designed, the working principle is analyzed and the mathematical models of degree of polarization and detection ability of the detector are derived. The SNR (signal-to-noise ratio) and number of phoelectrons needed by the detector are analyzed by simulation with the detection demand of 1% or 2% degree of polarization. Then, the integration time of the detector is calculated when detecting stars with different brightness according to the parameters of the detector we designed. The theoretical basis is given through these results. &copy; 2015 Elsevier GmbH. All rights reserved.
Number of references:6
Main heading:Signal to noise ratio
Controlled terms:Polarization - Signal detection - Stars
Uncontrolled terms:Astronomical observation - Degree of polarization - Detection ability - Ground based - Integration time - Polarization detection - Star magnitude
Classification code:657.2  Extraterrestrial Physics and Stellar Phenomena - 716.1  Information Theory and Signal Processing
DOI:10.1016/j.ijleo.2015.08.188

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 41>

Accession number:20152500946861
Title:Thermal design for the optical-structure system of high resolution high-altitude camera
Authors:Shi, Kui (1); Yang, Hong-Tao (1, 2); Chen, Wei-Ning (1); Fan, Zhe-Yuan (1, 2); Zhang, Gao-Peng (1); Wu, Deng-Shan (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) Graduate University of Chinese Academy of Sciences, Beijing, China
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:44
Issue:5
Issue date:May 1, 2015
Publication year:2015
Article number:0522005
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:To guarantee the image quality of a high-altitude camera in extreme low temperatures, thermal design for camera optical system was done by combined passive thermal control with active thermal control. Polyimide insulation material is used for passive thermal control, increasing the camera's thermal resistance between internal structures and external environment, and decreasing the influence of the external cryogenic environment on the temperatures of camera lens. The method of using electric heating film to heat camera lens was adopted as an active thermal control means. The heat transfer model of the lens in the optical system was built in the WorkBench finite element software with heating power loads, thermal convection loads and thermal radiation loads considered, and steady-state thermal analysis was carried out. It turned out that, the temperature of the camera optical system was controlled in the range of 18~22 when the heating power of six heating zones was 12, 17, 22, 17, 10, 13 W, and the thermal control result meted the design requirements. &copy;, 2015, Chinese Optical Society. All right reserved.
Number of references:12
Page count:5
Main heading:Temperature indicating cameras
Controlled terms:Altitude control - Camera lenses - Cameras - Design - Electric heating - Finite element method - Heat convection - Heat radiation - Heat transfer - Heating  - Lenses - Optical systems - Quality control - Thermal insulation - Thermal variables control - Thermoanalysis
Uncontrolled terms:Active thermal control - Cryogenic environment - External environments - Finite element software - Polyimide insulation - Steady-state thermal analysis - Thermal control - Thermal designs
Classification code:408  Structural Design - 413.2  Heat Insulating Materials - 641.2  Heat Transfer - 643.1  Space Heating - 704.2  Electric Equipment - 731.3  Specific Variables Control - 741.3  Optical Devices and Systems - 742.2  Photographic Equipment - 801  Chemistry - 913.3  Quality Assurance and Control - 921.6  Numerical Methods
DOI:10.3788/gzxb20154405.0522005

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 42>

Accession number:20154201387479
Title:Polarimetric dehazing method for dense haze removal based on distribution analysis of angle of polarization
Authors:Liang, Jian (1, 2); Ren, Liyong (1); Ju, Haijuan (1); Zhang, Wenfei (1, 2); Qu, Enshi (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China
Source title:Optics Express
Abbreviated source title:Opt. Express
Volume:23
Issue:20
Issue date:October 5, 2015
Publication year:2015
Pages:26146-26157
Language:English
E-ISSN:10944087
Document type:Journal article (JA)
Publisher:OSA - The Optical Society
Abstract:Many dehazing methods have proven to be effective in removing haze out of the hazy image, but few of them are adaptive in handling the dense haze. In this paper, based on the angle of polarization (AOP) distribution analysis we propose a kind of polarimetric dehazing method, which is verified to be capable of enhancing the contrast and the range of visibility of images taken in dense haze substantially. It is found that the estimating precision of the intensity of airlight is a key factor which determines the dehazing quality, and fortunately our method involves a high precision estimation inherently. In the experiments a good dehazing performance is demonstrated, especially for dense haze removal. We find that the visibility can be enhanced at least 74%. Besides, the method can be used not only in dense haze but also in severe sea fog. &copy; 2015 Optical Society of America.
Number of references:19
Main heading:Demulsification
Controlled terms:Polarimeters - Polarization - Visibility
Uncontrolled terms:Airlight - Angle of polarization - Dehazing - Distribution analysis - Haze removal - High-precision - Key factors - Sea fog
Classification code:741.2  Vision - 802.3  Chemical Operations - 941.3  Optical Instruments
DOI:10.1364/OE.23.026146

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 43>

Accession number:20152600969151
Title:Effects of packaging on the performances of high brightness 9xx nm CW mini-bar diode lasers
Authors:Li, Xiaoning (1, 2, 3); Wang, Jingwei (2); Feng, Feifei (1); Liu, Yalong (2); Yu, Dongshan (2); Zhang, Pu (1); Liu, Xingsheng (1, 2)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, 17 Xinxi Road, Xi'an, Shaanxi, China; (2) Focuslight Technologies Co. LTD, 60 Xibu Road, Xi'an, Shaanxi, China; (3) Key Laboratory for Physical Electronics and Devices, Shaanxi Key Lab of Information Photonic Technique, Xi'An Jiaotong University, Xianning West Road, Xi'an, Shaanxi, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9346
Volume title:Components and Packaging for Laser Systems
Part number:1 of 1
Issue date:2015
Publication year:2015
Article number:93460C
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628414363
Document type:Conference article (CA)
Conference name:Components and Packaging for Laser Systems
Conference date:February 9, 2015  -  February 12, 2015
Conference location:San Francisco, CA, United states
Conference code:112114
Sponsor:The Society of Photo-Optical Instrumentation Engineers (SPIE)
Publisher:SPIE
Abstract:9xx nm CW mini-bar diode lasers and stacks with high brightness and reliability are desired for pumping fiber lasers and direct fiber coupling applications. For the traditional cm-bar with 1mm-2mm cavity, it can provide CW output power up to 80W-100W and high reliability, whereas the brightness is relatively low. In comparison, mini-bar based diode lasers with 4mm cavity offer a superior performance balance between power, brightness, and reliability. However, the long cavity and large footprint of mini-bar diode laser renders its sensitivity towards thermal stress formed in packaging process, which directly affects the performances of high bright mini-bar diode lasers. In this work, the thermal stress correlating with package structure and packaging process are compared and analyzed. Based on the experiment and analysis results, an optimized package structure of CW 60W 976 nm mini-bar diode lasers is designed and developed which relieves thermal stress. &copy; 2015 SPIE.
Number of references:11
Main heading:Semiconductor lasers
Controlled terms:Diodes - Fiber lasers - Luminance - Packaging - Pumping (laser) - Reliability - Thermal stress
Uncontrolled terms:Experiment and analysis - Fiber couplings - High brightness - High reliability - Mini-bar - Package structure - Packaging process - Performance balance
Classification code:421  Strength of Building Materials; Mechanical Properties - 694.1  Packaging, General - 714.2  Semiconductor Devices and Integrated Circuits - 741.1  Light/Optics - 744  Lasers
DOI:10.1117/12.2080480

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 44>

Accession number:20151800807605
Title:Evanescent-field interaction with carbon nanotubes for a multi-wavelength ultrafast all-fiber laser
Authors:Han, X.X. (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
Corresponding author:Han, X.X.
Source title:Laser Physics
Abbreviated source title:Laser Phys.
Volume:25
Issue:5
Issue date:May 1, 2015
Publication year:2015
Article number:055104
Language:English
ISSN:1054660X
E-ISSN:15556611
Document type:Journal article (JA)
Publisher:Institute of Physics Publishing
Abstract:We report on the experimental observation of multi-wavelength operations based on the evanescent-field interaction with carbon nanotubes (CNTs). The saturable absorber (SA) is fabricated by depositing CNTs on a D-shaped fiber (DF). In the experiment, switchable dual-wavelength picosecond solitons with central wavelengths of 1532.2, 1556.6 nm and 1529.4, 1531.0 nm are achieved. Several single wavelength operations are also delivered by the all-fiber laser. Single- and multi-wavelength pulse emissions are effectively controlled by changing the pump power and optimizing the polarization controller. Our experiment demonstrates that the DF-SA can work as a versatile mode locker in ultrafast lasers. The flexible all-fiber laser is convenient and attractive for practical applications such as fiber optic sensing and photonic component characterization. &copy; 2015 Astro Ltd.
Number of references:98
Main heading:Mode-locked fiber lasers
Controlled terms:Carbon - Carbon nanotubes - Evanescent fields - Fiber lasers - Fibers - Locks (fasteners) - Nanotubes - Optical pumping - Saturable absorbers - Solitons  - Ultrafast lasers - Yarn
Uncontrolled terms:D-shape fibers - Mode-locked - Multi-wavelength operation - Multiwavelength pulse - Photonic components - Polarization controllers - Switchable dual wavelengths - Ultrafast fiber lasers
Classification code:601.3  Mechanisms - 701  Electricity and Magnetism - 741.1  Light/Optics - 741.1.2  Fiber Optics - 744.1  Lasers, General - 744.4  Solid State Lasers - 761  Nanotechnology - 804  Chemical Products Generally - 819.4  Fiber Products - 931.3  Atomic and Molecular Physics
DOI:10.1088/1054-660X/25/5/055104

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 45>

Accession number:20155201714912
Title:Prediction trajectory of moving target based on parameter identify in RLS filtering with forget factor
Authors:Yin, Yili (1, 2); Tian, Yan (1); Li, Zhang (1, 2)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) Graduate University of Chinese Academy of Sciences, Beijing, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9677
Monograph title:AOPC 2015: Optical Test, Measurement, and Equipment
Issue date:2015
Publication year:2015
Article number:967725
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628419023
Document type:Conference article (CA)
Conference name:Applied Optics and Photonics, China: Optical Test, Measurement, and Equipment, AOPC 2015
Conference date:May 5, 2015  -  May 7, 2015
Conference location:Beijing, China
Conference code:117015
Sponsor:Chinese Society for Optical Engineering
Publisher:SPIE
Abstract:A moving target should be missing from a photoelectric theodolite tracker, when the clouds and other special conditions encountered in the course of a theodolite tracking a moving object, and this condition should cause the interruption of tracking process. In view of this problem, an algorithm based on the frame of parameter identification and rolling prediction to trajectory was presented to predicting the target trajectory when it missing. Firstly, the article makes a specification of photoelectric theodolite and it operating mechanism detailed. The reasons of flying target imaging disappear from the field of theodolite telescope and the traditional solution to this problem, the least square curve fitting of trajectory quadratic function of time, were narrated secondly. The algorithm based on recursive least square with forget factor, identify the parameters of target motion using the data of position from single theodolite, then the forecasting trajectory of moving targets was presented afterwards,in the filtering approach of past data rolling smooth with the weight of last procedure. By simulation with tracking moving targets synthetic corner from a real tracking routine of photoelectric theodolite, the algorithm was testified, and the simulation of curve fitting a quadratic function of time was compared at the last part. &copy; COPYRIGHT SPIE 2015.
Number of references:7
Main heading:Target tracking
Controlled terms:Algorithms - Curve fitting - Forecasting - Optical testing - Parameter estimation - Photoelectricity - Trajectories
Uncontrolled terms:Forget factor - Least Square Curve Fitting - Operating mechanism - Photoelectric theodolite - Recursive least square (RLS) - Recursive-RLS - Tracking moving targets - Trajectory prediction
Classification code:741.1  Light/Optics - 741.3  Optical Devices and Systems - 921.6  Numerical Methods
DOI:10.1117/12.2202377

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 46>

Accession number:20153901305225
Title:Aliasing inuence reduction method for the estimation of compressive imaging system's modulation transfer function
Authors:Pan, Jinfeng (1, 2, 3); Qiu, Yuehong (2)
Author affiliation:(1) Space Optics Laboratory, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China; (3) School of Electric and Electronic Engineering, Shandong University of Technology, Zibo, China
Corresponding author:Pan, Jinfeng
Source title:Journal of Information and Computational Science
Abbreviated source title:J. Inf. Comput. Sci.
Volume:12
Issue:13
Issue date:September 1, 2015
Publication year:2015
Pages:5013-5020
Language:English
ISSN:15487741
Document type:Journal article (JA)
Publisher:Binary Information Press
Abstract:A method to reduce the signal aliasing influence on the Modulation Transfer Function (MTF) estimation is proposed in this study. The reduction of signal aliasing influence is realized by fitting Fermi function to the edge spread function that is estimated by modified slanted-edge method. The proposed method is suitable to measure the MTF of compressive imaging system, which is an aliased imaging system. The results of experiments show that the accuracy of the estimated MTF is improved when the proposed method is used. The cutoff frequency and the area under MTF of the compressive imaging system are also evaluated based on the proposed MTF estimation method. &copy;, 2015, Journal of Information and Computational Science. All right reserved.
Number of references:13
Main heading:Modulation
Controlled terms:Anti-aliasing - Compressed sensing - Cutoff frequency - Frequency estimation - Imaging systems - Optical transfer function - Transfer functions
Uncontrolled terms:Aliasing - Compressive imaging - Compressive sensing - Edge spread function - Estimation methods - Method - Modified Slanted-edge - Slanted-edge method
Classification code:703.1  Electric Networks - 716  Telecommunication; Radar, Radio and Television - 716.1  Information Theory and Signal Processing - 717  Optical Communication - 718  Telephone Systems and Related Technologies; Line Communications - 723.5  Computer Applications - 741  Light, Optics and Optical Devices - 741.1  Light/Optics - 746  Imaging Techniques
DOI:10.12733/jics20106457

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 47>

Accession number:20160501882733
Title:Metal-dielectric-metal based narrow band absorber for sensing applications
Authors:Lu, Xiaoyuan (1); Wan, Rengang (1); Zhang, Tongyi (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
Source title:Optics Express
Abbreviated source title:Opt. Express
Volume:23
Issue:23
Issue date:November 16, 2015
Publication year:2015
Pages:29842-29847
Language:English
E-ISSN:10944087
Document type:Journal article (JA)
Publisher:OSA - The Optical Society
Abstract:We have investigated numerically the narrowband absorption property of a metal-dielectric-metal based structure which includes a top metallic nanoring arrays, a metal backed plate, and a middle dielectric spacer. Its absorption is up to 90% with linewidth narrower than 10 nm. This can be explained in terms of surface lattice resonance of the periodic structure. The spectrum with the sharp absorption dip, i.e.The lattice resonance, strongly depends on the refractive index of media surrounding the nanorings. This feature can be explored to devise a refractive index sensor, of which the bulk sensitivity factor is one order larger than that based on gap resonance mode, while the surface sensitivity factor can be two times larger. The proposed narrowband absorber has potential in applications of plasmonic biosensors. &copy; 2015 Optical Society of America.
Number of references:35
Main heading:Plate metal
Controlled terms:Absorption spectroscopy - Metals - Nanorings - Nanostructured materials - Refractive index - Refractometers - Resonance
Uncontrolled terms:Absorption property - Dielectric spacers - Lattice resonances - Metal dielectrics - Plasmonic biosensors - Refractive index sensor - Sensing applications - Surface sensitivity
Classification code:741.1  Light/Optics - 761  Nanotechnology - 931.1  Mechanics - 933  Solid State Physics - 941.3  Optical Instruments
DOI:10.1364/OE.23.029842

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 48>

Accession number:20151000613088
Title:Passively harmonic mode-locked fiber laser with a high signal-to-noise ratio via Evanescent-light deposition of Bismuth Telluride (Bi<inf>2</inf>Te<inf>3</inf>) topological insulator based saturable absorber
Authors:Duan, L.N. (1); Wang, Y.G. (1); Xu, C.W. (2); Li, L. (1); Wang, Y.S. (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) College of Optoelectronic Engineering, Shenzhen University, Shenzhen, China
Corresponding author:Wang, Y.G.
Source title:IEEE Photonics Journal
Abbreviated source title:IEEE Photon. J.
Volume:7
Issue:2
Issue date:April 1, 2015
Publication year:2015
Article number:7051323
Language:English
ISSN:19430655
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:Passively harmonic mode locking (HML) operation had been demonstrated in an erbium-doped fiber laser with a microfiber-based topological insulator (TI) Bi<inf>2</inf>Te<inf>3</inf> saturable absorber (SA). It was found that the pulse train possessed different orders of HML (with a tunable repetition rate from 232 to 390 MHz) due to different incident pump powers. The spectra exhibited typical features of conventional solitons (perfect Gaussian profile with Kelly sidebands) with no continuous wave component. The measured signal-to-noise ratio (SNR) reached 60 dB, whereas the pulse duration was kept around 1.32 ps without significant change. The experimental observation revealed that the microfiber-based TI device could indeed be employed as a high-performance SA for further applications in ultrafast photonics. &copy; 2009-2012 IEEE.
Number of references:23
Main heading:Signal to noise ratio
Controlled terms:Electric insulators - Fiber lasers - Laser mode locking - Locks (fasteners) - Mode-locked fiber lasers - Optical pumping - Pulse repetition rate - Q switched lasers - Saturable absorbers - Solitons
Uncontrolled terms:Bismuth telluride - Erbium doped fiber laser - Gaussian profiles - Harmonic mode locking - High signal-to-noise ratio - Micro-fiber - Topological insulators - Ultra-fast photonics
Classification code:601.3  Mechanisms - 704  Electric Components and Equipment - 716.1  Information Theory and Signal Processing - 741.1  Light/Optics - 741.1.2  Fiber Optics - 744.1  Lasers, General - 744.4  Solid State Lasers - 931.3  Atomic and Molecular Physics
DOI:10.1109/JPHOT.2015.2404315

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 49>

Accession number:20153801282983
Title:Relative Orientation Dependent on Dual Quaternions
Authors:Sheng, Qing H. (1); Shao, Sa (1); Xiao, Hui (2); Zhu, Feng (3); Wang, Qing (1); Zhang, Bin (1)
Author affiliation:(1) Nanjing University of Astronautics and Aeronautics, Nanjing, China; (2) Nanjing Xiaozhuang University, Nanjing, China; (3) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an, China
Source title:Photogrammetric Record
Abbreviated source title:Photogrammetric Rec.
Volume:30
Issue:151
Issue date:September 1, 2015
Publication year:2015
Pages:300-317
Language:English
ISSN:0031868X
E-ISSN:14779730
CODEN:PGREAY
Document type:Journal article (JA)
Publisher:Blackwell Publishing Ltd
Abstract:A new approach to relative orientation based on dual quaternions is proposed. Dual quaternions are used to express a unified description of the relative position and orientation of two images in a stereopair. The coplanarity condition equation and its linearised model based on dual quaternions are established. According to the principle of least squares adjustment with constraints, a dual quaternion can be identified and the relative-orientation parameters can then be obtained by a non-linear transformation of the components of the dual quaternion. Experimental results show that the proposed approach is feasible and more reliable and efficient than the conventional approach based on Euler angles. &copy; 2015 The Remote Sensing and Photogrammetry Society and John Wiley & Sons Ltd.
Number of references:22
Main heading:Linear transformations
Controlled terms:Mathematical transformations
Uncontrolled terms:Conventional approach - Digital photogrammetry - Dual quaternion - Euler angles - Least squares adjustments - Non-linear transformations - Relative orientation - Unified description
Classification code:921.3  Mathematical Transformations
DOI:10.1111/phor.12111

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 50>

Accession number:20151100635534
Title:On two heuristic viewpoints concerning the study of light
Authors:Bi, Siwen (1, 2)
Author affiliation:(1) Institute of Remote Sensing and Digital Earth Chinese Academy of Science, State Key Laboratory of Remote Sensing Science, Peking, China; (2) Xi'an Institute of Optics and Precision Mechanics of CAS, State Key Laboratory of Transient Optics and Photonics, Xi'an, China
Corresponding author:Bi, Siwen
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9449
Volume title:International Conference on Photonics and Optical Engineering, icPOE 2014
Part number:1 of 1
Issue date:2015
Publication year:2015
Article number:94490L
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628415650
Document type:Conference article (CA)
Conference name:International Conference on Photonics and Optical Engineering, icPOE 2014
Conference date:October 13, 2014  -  October 15, 2014
Conference location:Xi'an, China
Conference code:111356
Sponsor:Optics and Photonics Society of Singapore; Shaanxi Optical Society; Shaanxi Provincial Physical Society
Publisher:SPIE
Abstract:It has been a debatable problem that what the essence of light is, and how it is produced. Since the modern times, as James Clerk Maxwell setting the theory of electromagnetic up, the mainstream consciousness was occupied gradually by the wave theory of light. But at the end of 19th century, a series experimental phenomenon weren't precisely explained by the wave theory of light such as photoelectric effect experiment. Then Albert Einstein published his famous paper On a Heuristic Viewpoint Concerning the Production and Transformation of Light, which laid the foundation of light quantum hypothesis. While solving these problems perfectly, a new problem was caused that because the wave theory and the quantum theory are both applicable to interpret some of the experiment of light, what is the essence of light. This paper first outlines the history of optical development and current status, and states the difficulties and deficiencies of the study of light. Then we put forward the key concept of the paper called lightstring which consults some points of the theory of modern optics and physics which called the optical frequency comb and the string theory, then presents the essence of light based on the light string concept in order to make the concept of photons specific. And then we put forward the production mechanism of light - - the String-Light effect based on the concept of light string. In this paper, we attempt to put forward a new idea of the study of the essence of light and the production mechanism of it. &copy; 2015 SPIE.
Number of references:10
Main heading:Light
Controlled terms:Algorithms - Natural frequencies - Optical materials - Photoelectricity - Photonics - Photons - Problem solving - Quantum theory - String theory
Uncontrolled terms:Albert Einstein - Current status - Light effects - Lightstring - Modern optics - Optical development - Optical frequency combs - Production mechanisms
Classification code:723  Computer Software, Data Handling and Applications - 741.1  Light/Optics - 741.3  Optical Devices and Systems - 921  Mathematics - 931  Classical Physics; Quantum Theory; Relativity - 931.4  Quantum Theory; Quantum Mechanics - 932  High Energy Physics; Nuclear Physics; Plasma Physics
DOI:10.1117/12.2085041

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 51>

Accession number:20145200358834
Title:Improved non-negative tensor Tucker decomposition algorithm for interference hyper-spectral image compression
Authors:Wen, Jia (1, 2); Zhao, JunSuo (1); Ma, CaiWen (2); Wang, CaiLing (3)
Author affiliation:(1) Science and Technology on Integrated Information System Laboratory, Institute of Software, Chinese Academy of Sciences, Beijing, China; (2) Xi&rsquo;an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi&rsquo;an, China; (3) College of Computer Science, Xi&rsquo;an Shiyou University, Xi&rsquo;an, China
Corresponding author:Wen, Jia
Source title:Science China Information Sciences
Abbreviated source title:Sci. China Inf. Sci.
Volume:58
Issue:5
Issue date:May 1, 2015
Publication year:2015
Language:English
ISSN:1674733X
Document type:Journal article (JA)
Publisher:Science in China Press
Abstract:The compression method, first proposed in 2012, is based on the non-negative tensor decomposition for interference hyper-spectral image data. As a tensor is generated by a huge amount of interference hyper-spectral images, the multiplicative update algorithm is made extremely complicated, and even unfeasible. To reduce the computational cost and speed up the convergence, this paper, based on the characteristics of interference hyper-spectral images, develops a new algorithm using different down-sampling factors for different non-negative wavelet sub-band tensors. The experimental results showed that this algorithm could significantly shorten the running time, while maintaining a good compression performance compared with the conventional methods. &copy; 2014, Science China Press and Springer-Verlag Berlin Heidelberg.
Number of references:17
Page count:9
Main heading:Tensors
Controlled terms:Algorithms - Image compression - Interference suppression - Spectroscopy - Wavelet decomposition
Uncontrolled terms:Compression performance - Conventional methods - Hyper-spectral images - LASIS - Lifting wavelet transforms - Multiplicative updates - Non-negative tensor decompositions - Tucker decompositions
DOI:10.1007/s11432-014-5165-x

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 52>

Accession number:20161202125328
Title:A rotating-mirror scanning camera system for light-sheet microscopy
Authors:Wu, Di (1); Zhou, Xing (1); Li, Runze (1); Yang, Yanlong (1); Yao, Baoli (1); Ye, Tong (2)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) Department of Bioengineering, Clemson University, Center for Optical Materials Science and Engineering Technologies (COMSET), CU-MUSC Bioengineering Program, Charleston; SC, United States
Source title:2015 Opto-Electronics and Communications Conference, OECC 2015
Abbreviated source title:Opto-Electron. Commun. Conf., OECC
Monograph title:2015 Opto-Electronics and Communications Conference, OECC 2015
Issue date:November 30, 2015
Publication year:2015
Article number:7340343
Language:English
ISBN-13:9781467379441
Document type:Conference article (CA)
Conference name:Opto-Electronics and Communications Conference, OECC 2015
Conference date:June 28, 2015  -  July 2, 2015
Conference location:Shanghai, China
Conference code:118434
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:We report a rotating-mirror scanning camera system based on a galvanometer and a CCD camera. This system improves the imaging speed by placing a series of paralleled images on the sensor of the camera so that multiple images are acquired during one single exposure; thus, the frame rate of the CCD camera does not limit the temporal resolution of recorded events. The camera is implemented on a custom designed light-sheet microscopy and aims to improve the imaging speed while the high spatial resolution is still retained on the light-sheet microscope. &copy; 2015 IEEE.
Number of references:7
Main heading:CCD cameras
Controlled terms:Mirrors - Scanning
Uncontrolled terms:Light-sheet microscopies - Rotating mirrors - Scanning mirror - Spatial variations - Temporal resolution
Classification code:714.2  Semiconductor Devices and Integrated Circuits - 741.3  Optical Devices and Systems
DOI:10.1109/OECC.2015.7340343

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 53>

Accession number:20153001072350
Title:Numerical and Experimental Analysis of Sensitivity-Enhanced RI Sensor Based on Ex-TFG in Thin Cladding Fiber
Authors:Yan, Zhijun (1, 2); Sun, Zhongyuan (1); Zhou, Kaiming (1); Luo, Binbin (1, 3); Li, Jianfeng (1, 4); Wang, Hushan (2); Wang, Yishan (2); Zhao, Wei (2); Zhang, Lin (1)
Author affiliation:(1) Aston Institute of Photonic Technologies, Aston University, Birmingham, United Kingdom; (2) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (3) Department of Electronic Engineering, Chongqing University of Technology, Chongqing, China; (4) School of Optoelectronic Information, University of Electronic Science and Technology of China, Chengdu, China
Source title:Journal of Lightwave Technology
Abbreviated source title:J Lightwave Technol
Volume:33
Issue:14
Issue date:July 15, 2015
Publication year:2015
Pages:3023-3027
Article number:7089159
Language:English
ISSN:07338724
CODEN:JLTEDG
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:We report a highly sensitive refractive index (RI) sensor in the aqueous solution, which is based on an 81&deg;-tilted fiber grating structure inscribed into a thin cladding fiber with 40 &mu;m cladding radius. The numerical analysis has indicated that the RI sensitivity of cladding resonance mode of the grating can be significantly enhanced with reducing cladding size. This has been proved by the experimental results as the RI sensitivities of TM and TE resonance peaks in the index region of 1.345 have been increased to 1180 nm/RIU and 1150 nm/RIU, respectively, from only 200 and 170 nm/RIU for the same grating structure inscribed in standard telecom fiber with 62.5-&mu;m cladding radius. Although the temperature sensitivity has also increased, the change in temperature sensitivity is still insignificant in comparison with RI sensitivity enhancement. &copy; 1983-2012 IEEE.
Number of references:24
Main heading:Refractive index
Controlled terms:Cladding (coating) - Diffraction gratings - Fibers - Sensitivity analysis - Solutions - Temperature sensors
Uncontrolled terms:Grating structures - Numerical and experimental analysis - Refractive index sensing - Refractive index sensor - Sensitivity - Sensitivity enhancements - Temperature sensitivity - Tilted fiber gratings
Classification code:535.1  Metal Rolling - 732  Control Devices - 741.1  Light/Optics - 741.3  Optical Devices and Systems - 801  Chemistry - 803  Chemical Agents and Basic Industrial Chemicals - 804  Chemical Products Generally - 812  Ceramics, Refractories and Glass - 817  Plastics and Other Polymers: Products and Applications - 921  Mathematics
DOI:10.1109/JLT.2015.2422076

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 54>

Accession number:20153501209545
Title:Accurate frequency estimator for optical coherent M-PSK system based on FFT and multiple signal classification algorithm
Authors:Zhang, Kewei (1, 2); Wang, Wei (1); Zhao, Wei (1); Xie, Xiaoping (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China
Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering
Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.
Volume:44
Issue:5
Issue date:May 25, 2015
Publication year:2015
Pages:1593-1597
Language:English
ISSN:10072276
Document type:Journal article (JA)
Publisher:Chinese Society of Astronautics
Abstract:For optical coherent M-ary phase-shift-keying (M-PSK) system, the frequency offset algorithm based on differential phase or FFT maximization which was widely used is difficult to achieve MHz estimation error when the data length is short, which is difficult for the following carrier phase estimation to recover the data. To meet the needs of high accuracy and real-time performance for frequency offset estimation in the M-PSK system, a frequency estimator based on fast Fourier transform and multiple signal classification (MUSIC) was proposed and investigated. For the first time, MUSIC algorithm was used in this area. The proposed algorithm is accurate especially when the data length is short. The principle and flowchart were proposed to illustrate the algorithm. Numerical simulations of 20-Gbaud QPSK coherent systems were carried out to demonstrate this algorithm. &copy;, 2015, Chinese Society of Astronautics. All right reserved.
Number of references:14
Main heading:Phase shift keying
Controlled terms:Algorithms - Estimation - Fast Fourier transforms - Frequency allocation - Frequency estimation - Optical communication - Phase shift - Phase shifters - Quadrature phase shift keying - Signal encoding  - Wavelet analysis
Uncontrolled terms:Carrier phase estimation - Coherent detection - Frequency estimators - Frequency offset estimation - M-ary phase shift keying - Multiple signal classification - Multiple signal classification algorithm - Real time performance
Classification code:703.1  Electric Networks - 716  Telecommunication; Radar, Radio and Television - 717.1  Optical Communication Systems - 921  Mathematics - 921.3  Mathematical Transformations - 942.2  Electric Variables Measurements

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 55>

Accession number:20160601889084
Title:Hundred micro-joules level femtosecond fiber laser amplification system
Authors:Li, Feng (1); Yang, Zhi (1); Zhao, Wei (1); Li, Qianglong (1); Hu, Xiaohong (1); Yang, Xiaojun (1); Wang, Yishan (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; Shaanxi, China
Corresponding author:Yang, Zhi(yangzhi@opt.ac.cn)
Source title:Zhongguo Jiguang/Chinese Journal of Lasers
Abbreviated source title:Zhongguo Jiguang
Volume:42
Issue:12
Issue date:December 10, 2015
Publication year:2015
Article number:1202005
Language:Chinese
ISSN:02587025
CODEN:ZHJIDO
Document type:Journal article (JA)
Publisher:Science Press
Abstract:A fiber chirped pulse amplification system based on Yb<sup>3+</sup>doped fibers is demonstrated. The seeder is a mode-locked fiber laser with semiconductor saturable absorber, the chirped pulse amplification technique is applied to stretch the 1030 nm pulse to several hundred picoseconds to be amplified. The single mode picosecond pulses with average power of 50 W and repetition rates of 211 kHz are achieved by using multistage pre-amplifier consisted with Yb<sup>3+</sup>doped single mode fiber amplifier and double cladding fiber amplifier and the main amplifier with a large mode area rod-typed photonic crystal fiber as the laser gain material. Properly controlled the gain and the nonlinearity in every step of the amplification system, the influence of nonlinear effects are effectively suppressed on the pulse of time domain in high energy amplification. Laser pulses with pulse duration of 887 fs are generated by a reflective grating-pair compressor, corresponding to single pulse energy of 124 &mu;J and peak power of 139.8 MW. This experimental result of hundred micro joules level femtosecond laser based on fiber structure is firstly reported in China. &copy; 2015, Science Press. All right reserved.
Number of references:11
Page count:6
Main heading:Fiber amplifiers
Controlled terms:Amplification - Chirp modulation - Cladding (coating) - Crystal whiskers - Fiber lasers - Fibers - Lasers - Nonlinear optics - Photonic crystal fibers - Pulse repetition rate  - Saturable absorbers - Semiconductor lasers - Single mode fibers - Ultrashort pulses - Ytterbium
Uncontrolled terms:Chirped pulse amplification systems - Chirped pulse amplifications - Double cladding fiber - Energy amplification - Femtosecond fiber lasers - Reflective gratings - Semiconductor saturable absorbers - Single pulse energy
Classification code:547.2  Rare Earth Metals - 716  Telecommunication; Radar, Radio and Television - 741.1.1  Nonlinear Optics - 741.1.2  Fiber Optics - 744  Lasers - 933.1.1  Crystal Lattice
DOI:10.3788/CJL201542.1202005

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 56>

Accession number:20155201714936
Title:Videometrics technology of flyers' pose
Authors:Hu, Xiaoli (1, 2, 3); Su, Xiuqin (1); Zhang, Sanxi (3); Liu, Biao (3); Zhou, Zhiqiang (3)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an, Shaanxi, China; (2) University of Chinese Academy of Sciences, Beijing, China; (3) Huayin Ordnance Test Center, Shaanxi, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9677
Monograph title:AOPC 2015: Optical Test, Measurement, and Equipment
Issue date:2015
Publication year:2015
Article number:96770V
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628419023
Document type:Conference article (CA)
Conference name:Applied Optics and Photonics, China: Optical Test, Measurement, and Equipment, AOPC 2015
Conference date:May 5, 2015  -  May 7, 2015
Conference location:Beijing, China
Conference code:117015
Sponsor:Chinese Society for Optical Engineering
Publisher:SPIE
Abstract:In this paper pose measurement refers to flying pose measurement of rigid body including the pitch angle, yaw angel and roll angle. Pose measurement is of vital importance for such items as weapons settings, fault analysis and optimation design. Pose measurement based on optical images has many merits such as intuitive and non-contacted, which is a main method to measure pose currently. According to the parameters used and principle of the algorithms, the existing methods of pose measurement based on optical images are classified systematically and comprehensively for the first time as following: the methods of one station un-using camera's inner parameters are divided into the feature length ratio method and the direct linear transformation(DLT)method, otherwise they are divided into the perspective n points(PNP)problem and the optical and radar integration method, the axes from planes intersection using two stations extensible to multistation, and model matching applied to one or more stations, and then they are comparatively analyzed.At last combined with practical applications such as one or more stations, have or no model and inner parameters used or unused, some selection and improvement of key points are given practically. &copy; 2015 SPIE.
Number of references:19
Main heading:Image matching
Controlled terms:Geometrical optics - Linear transformations - Mathematical transformations - Optical testing - Radar stations
Uncontrolled terms:Direct linear transformation - Fault analysis - Length ratio - Model matching - Optical image - Perspective n points - Pose measurement - Radar integration
Classification code:716.2  Radar Systems and Equipment - 741.1  Light/Optics - 741.3  Optical Devices and Systems - 921.3  Mathematical Transformations
DOI:10.1117/12.2199225

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 57>

Accession number:20160801967183
Title:A new dehazing algorithm based on overlapped sub-block homomorphic filtering
Authors:Yu, Lu (1, 2, 3); Liu, Xuebin (1); Liu, Guizhong (2)
Author affiliation:(1) Laboratory of Spectral Imaging Technique, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) School of Electron. and Info.Eng., Xi'An Jiaotong University, Xi'an, China; (3) University of Chinese Academy of Sciences, Beijing, China
Corresponding author:Yu, Lu(yuluu921@163.com)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9875
Monograph title:Eighth International Conference on Machine Vision, ICMV 2015
Issue date:2015
Publication year:2015
Article number:987502
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510601161
Document type:Conference article (CA)
Conference name:8th International Conference on Machine Vision, ICMV 2015
Conference date:November 19, 2015  -  November 21, 2015
Conference location:Barcelona, Spain
Conference code:118333
Publisher:SPIE
Abstract:Considering the images captured under hazy weather conditions are blurred, a new dehazing algorithm based on overlapped sub-block homomorphic filtering in HSV color space is proposed. Firstly, the hazy image is transformed from RGB to HSV color space. Secondly, the luminance component V is dealt with the overlapped sub-block homomorphic filtering. Finally, the processed image is converted from HSV to RGB color space once again. Then the dehazing images will be obtained. According to the established algorithm model, the dehazing images could be evaluated by six objective evaluation parameters including average value, standard deviation, entropy, average gradient, edge intensity and contrast. The experimental results show that this algorithm has good dehazing effect. It can not only improve degradation of the image, but also amplify the image details and enhance the contrast of the image effectively. &copy; 2015 SPIE.
Number of references:10
Main heading:Edge detection
Controlled terms:Algorithms - Color - Computer vision - Demulsification - Parameter estimation
Uncontrolled terms:Dehazing - Homomorphic filtering - HSV color spaces - Objective evaluation - Sub-blocks
Classification code:741.1  Light/Optics - 741.2  Vision - 802.3  Chemical Operations
DOI:10.1117/12.2228467

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 58>

Accession number:20154401475341
Title:Medical image registration based on salient texture
Authors:Wang, Hong-Yu (1); Feng, Jun (1); Cui, Lei (1); He, Xiao-Wei (1); Qiu, Shi (2)
Author affiliation:(1) College of Information Science and Technology, Northwest University, Xi'an, China; (2) Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Science, Xi'an, China
Corresponding author:Feng, Jun
Source title:Guangxue Jingmi Gongcheng/Optics and Precision Engineering
Abbreviated source title:Guangxue Jingmi Gongcheng
Volume:23
Issue:9
Issue date:September 1, 2015
Publication year:2015
Pages:2656-2665
Language:Chinese
ISSN:1004924X
CODEN:GJGOF4
Document type:Journal article (JA)
Publisher:Chinese Academy of Sciences
Abstract:Traditional registration methods based on geometric measurement can not match the medical image with local deformation. To solve the problem, an improved Iterative Closest Points (ICP) algorithm about human visual cognitive process is proposed base on the salient texture. Firstly, the method establishes the model for the salient texture feature of a medical image based on Active Appearance Model (AAM) algorithm, and it gives the feature point with more salient for a larger weight to complete the image match in the first step. Then, it introduces the salient texture distance to the traditional space distance. By simulating the human visual cognitive process proposed by Gestalt, the linear decreasing weight is used to balance the two kinds of distance measuring methods. With the algorithm, a whole registration is obtained by the geometric distance in the early stage. On the other hand, the feature points of local deformation are accurately registrated with the texture features in the later stage. At last, a series of experiments are performed on real live images. The experiment results show that the algorithm can get a good matching result, and the registration accuracy is 78.82%, increasing by 22.22% as compared with those of other popular algorithms. The experimental results also show that it is not sensitive to the rotation of the images. It concludes that the algorithm solves the registration problems of local deformation in medical organs and achieves higher precision and stronger robustness. &copy;, 2015, Chinese Academy of Sciences. All right reserved.
Number of references:22
Main heading:Image matching
Controlled terms:Algorithms - Cognitive systems - Deformation - Image registration - Image texture - Iterative methods - Medical imaging - Medical problems
Uncontrolled terms:Active appearance models - Geometric distances - Geometric measurements - Iterative closest point algorithm - Iterative closest points algorithms - Registration accuracy - Registration methods - Registration problems
Classification code:723.2  Data Processing and Image Processing - 746  Imaging Techniques - 921.6  Numerical Methods
DOI:10.3788/OPE.20152309.2656

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 59>

Accession number:20154401475219
Title:Small target detection in hyperspectral remote sensing image based on adaptive parameter SVM
Authors:Wu, Yiquan (1, 2); Zhou, Yang (1); Long, Yunlin (1)
Author affiliation:(1) College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing; Jiangsu, China; (2) Key Laboratory of Spectral Imaging Technology Chinese Academy of Science, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an; Shaanxi, China
Source title:Guangxue Xuebao/Acta Optica Sinica
Abbreviated source title:Guangxue Xuebao
Volume:35
Issue:9
Issue date:September 10, 2015
Publication year:2015
Article number:0928001
Language:Chinese
ISSN:02532239
CODEN:GUXUDC
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:As for the problem of small target detection in hyperspectral remote sensing image, a detection method based on adaptiveparameter support vector machine (SVM) is proposed. The low dimensional information of the hyperspectral image is obtained using the method of principal component analysis (PCA) and the redundancy of data is reduced. Then, small targets are positioned fast and roughly by an unsupervised detection method, and the posterior information of SVM is got by the position result. The kernel parameter of SVM is determined adaptively based on the posterior information and the criteria of divergence in the kernel space. The best hyperplane in the kernel space for the segmentation of targets and background is found by the SVM. Pixels are separated to targets and background by the best hyperplane. The accurate and stable target detection result is obtained by iteration. A large number of experimental results show that, compared to the existing methods such as RX method, kernel RX method and support vector data description (SVDD) method, the proposed method is more effective to detect small targets accurately in the hyperspectral remote sensing image. &copy;, 2015, Chinese Optical Society. All right reserved.
Number of references:21
Page count:10
Main heading:Radar target recognition
Controlled terms:Data description - Geometry - Image reconstruction - Iterative methods - Principal component analysis - Remote sensing - Space optics - Spectroscopy - Support vector machines
Uncontrolled terms:Adaptive parameters - Detection methods - Hyper-spectral images - Hyperspectral Remote Sensing Image - Kernel parameter - Small target detection - Support vector data description - Unsupervised detection
Classification code:656.1  Space Flight - 716.2  Radar Systems and Equipment - 723  Computer Software, Data Handling and Applications - 921  Mathematics - 921.6  Numerical Methods - 922.2  Mathematical Statistics
DOI:10.3788/AOS201535.0928001

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 60>

Accession number:20152701002846
Title:A level set method with shape priors by using locality preserving projections
Authors:Wang, Bin (1); Gao, Xinbo (1); Li, Jie (1); Li, Xuelong (2); Tao, Dacheng (3)
Author affiliation:(1) School of Electronic Engineering, Xidian University, Xi'an, Shaanxi, China; (2) Center for OPTical IMagery Analysis and Learning (OPTIMAL), State Key La-boratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, Shaanxi, China; (3) Centre for Quantum Computation and Intelligent Systems, University of Technology, Sydney, Australia
Corresponding author:Wang, Bin
Source title:Neurocomputing
Abbreviated source title:Neurocomputing
Volume:170
Issue date:December 25, 2015
Publication year:2015
Pages:188-200
Language:English
ISSN:09252312
E-ISSN:18728286
CODEN:NRCGEO
Document type:Journal article (JA)
Publisher:Elsevier
Abstract:A novel level set method (LSM) with the constraint of shape priors is proposed to implement a selective image segmentation. Firstly, the shape priors are aligned by using image moment to deprive the spatial related information. Secondly, the aligned shape priors are projected into the subspace expanded by using locality preserving projection to measure the similarity between the shapes. Finally, a new energy functional is built by combing data-driven and shape-driven energy items to implement a selective image segmentation method. We assess the proposed method and some representative LSMs on the synthetic, medical and natural images, the results suggest that the proposed one is superior to the pure data-driven LSMs and the representative LSMs with shape priors. &copy; 2015 Elsevier B.V.
Number of references:48
Main heading:Numerical methods
Controlled terms:Drop breakup - Image segmentation - Level measurement - Medical imaging
Uncontrolled terms:Active contours - Image moments - Level Set method - Locality preserving projections - Natural images - New energies - Segmentation methods - Shape priors
DOI:10.1016/j.neucom.2014.07.086

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 61>

Accession number:20153601232608
Title:Observation and interpretation of energy efficient, diffuse direct current glow discharge at atmospheric pressure
Authors:Tang, Jie (1); Jiang, Weiman (1); Li, Jing (1, 2); Wang, Yishan (1); Zhao, Wei (1); Duan, Yixiang (1, 3)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics of CAS, Xi'an, China; (2) Faculty of Mathematics and Physics, Huaiyin Institute of Technology, Huaian, China; (3) Research Center of Analytical Instrumentation, Sichuan University, Chengdu, China
Corresponding author:Tang, Jie
Source title:Applied Physics Letters
Abbreviated source title:Appl Phys Lett
Volume:107
Issue:8
Issue date:August 24, 2015
Publication year:2015
Article number:083505
Language:English
ISSN:00036951
CODEN:APPLAB
Document type:Journal article (JA)
Publisher:American Institute of Physics Inc.
Abstract:A diffuse direct-current glow discharge was realized with low energy consumption and high energy utilization efficiency at atmospheric pressure. The formation of diffuse discharge was demonstrated by examining and comparing the electrical properties and optical emissions of plasmas. In combination with theoretical derivation and calculation, we draw guidelines that appearance of nitrogen ions at low electron density is crucial to enhance the ambipolar diffusion for the expansion of discharge channel and the increasing ambipolar diffusion near the cathode plays a key role in the onset of diffuse discharge. An individual-discharge-channel expansion model is proposed to explain the diffuse discharge formation. &copy; 2015 AIP Publishing LLC.
Number of references:22
Main heading:Energy efficiency
Controlled terms:Atmospheric pressure - Energy utilization - Glow discharges - Optical properties
Uncontrolled terms:Ambipolar diffusion - Direct current glow discharges - Discharge channel - Energy efficient - Energy utilization efficiency - Low energy consumption - Optical emissions - Theoretical derivations
Classification code:443.1  Atmospheric Properties - 525.2  Energy Conservation - 525.3  Energy Utilization - 701.1  Electricity: Basic Concepts and Phenomena - 741.1  Light/Optics
DOI:10.1063/1.4929606

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 62>

Accession number:20150400447475
Title:Person reidentification by minimum classification error-based KISS metric learning
Authors:Tao, Dapeng (1); Jin, Lianwen (1); Wang, Yongfei (1); Li, Xuelong (2)
Author affiliation:(1) School of Electronic and Information Engineering, South China University of Technology, Guangzhou, China; (2) Center for OPTical IMagery Analysis and Learning, State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xi'an, China
Source title:IEEE Transactions on Cybernetics
Abbreviated source title:IEEE Trans. Cybern.
Volume:45
Issue:2
Issue date:February 1, 2015
Publication year:2015
Pages:242-252
Article number:6824754
Language:English
ISSN:21682267
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:In recent years, person reidentification has received growing attention with the increasing popularity of intelligent video surveillance. This is because person reidentification is critical for human tracking with multiple cameras. Recently, keep it simple and straightforward (KISS) metric learning has been regarded as a top level algorithm for person reidentification. The covariance matrices of KISS are estimated by maximum likelihood (ML) estimation. It is known that discriminative learning based on the minimum classification error (MCE) is more reliable than classical ML estimation with the increasing of the number of training samples. When considering a small sample size problem, direct MCE KISS does not work well, because of the estimate error of small eigenvalues. Therefore, we further introduce the smoothing technique to improve the estimates of the small eigenvalues of a covariance matrix. Our new scheme is termed the minimum classification error-KISS (MCE-KISS). We conduct thorough validation experiments on the VIPeR and ETHZ datasets, which demonstrate the robustness and effectiveness of MCE-KISS for person reidentification. &copy; 2013 IEEE.
Number of references:59
Main heading:Covariance matrix
Controlled terms:Eigenvalues and eigenfunctions - Face recognition - Maximum likelihood - Maximum likelihood estimation - Security systems
Uncontrolled terms:Covariance matrices - Discriminative learning - Intelligent video surveillance - Metric learning - Minimum classification error - Person re identifications - Small sample size problems - Smoothing techniques
Classification code:716  Telecommunication; Radar, Radio and Television - 914.1  Accidents and Accident Prevention - 921.1  Algebra - 922  Statistical Methods - 922.1  Probability Theory
DOI:10.1109/TCYB.2014.2323992

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 63>

Accession number:20160801975734
Title:Study on the mutual alignment technology based on four-quadrant detectors
Authors:Hu, Ya-Bin (1, 2); Wang, Miao (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China
Corresponding author:Wang, Miao(wangmiao@opt.cn)
Source title:Guangdianzi Jiguang/Journal of Optoelectronics Laser
Abbreviated source title:Guangdianzi Jiguang
Volume:26
Issue:11
Issue date:November 15, 2015
Publication year:2015
Pages:2193-2199
Language:Chinese
ISSN:10050086
CODEN:GUJIE9
Document type:Journal article (JA)
Publisher:Board of Optronics Lasers
Abstract:Mutual alignment accuracy is a main factor which affects the joint calibration of panoramic stereo cameras and laser radars in the dynamic spatial sensing area. To improve the result of joint calibration, we analyze the traditional technology of mutual alignment with telescope cross wires. As it is tedious and difficult, a new method of mutual alignment based on four-quadrant detectors is provided. The laser transmitter, four-quadrant detector and coarse aiming device are respectively arranged on two instruments. And the laser beam irradiates the active area of four-quadrant detector through coarse aiming. Then the center of light spot offset relative to the center of the active area is obtained according to the output voltage of four quadrants. Thus the positions and the poses of two instruments can be adjusted properly to realize mutual alignment. The simulation analysis and experimental results indicate that the four-quadrant detector alignment accuracy can meet the requirement of mutual alignment. This method provides a new idea for joint calibration, which operates more easily than the mutual alignment technology based on the telescope cross wire. &copy; 2015, Board of Optronics Lasers. All right reserved.
Number of references:20
Main heading:Calibration
Controlled terms:Alignment - Laser beams - Lasers - Stereo image processing - Telescopes
Uncontrolled terms:Alignment accuracy - Four quadrant detectors - Joint calibration - Laser transmitters - Positioning error - Simulation analysis - Spot offset - Technology-based
Classification code:601.1  Mechanical Devices - 723.2  Data Processing and Image Processing - 744.1  Lasers, General - 744.8  Laser Beam Interactions
DOI:10.16136/j.joel.2015.11.0520

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 64>

Accession number:20160101753646
Title:Two types of cavities for side-pumped Nd:YAG laser mode locked by semiconductor saturable absorber mirror
Authors:Wang, J.L. (1); Jiang, Z.J. (1, 2); Zhu, J.F. (1); Wang, Y.G. (2)
Author affiliation:(1) School of Physics and Optoelectonic Engineering, Xidian University, Xi'an, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
Corresponding author:Wang, J.L.(dispersion@126.com)
Source title:Optik
Abbreviated source title:Optik
Volume:126
Issue:23
Issue date:2015
Publication year:2015
Pages:3752-3754
Language:English
ISSN:00304026
Document type:Journal article (JA)
Publisher:Elsevier GmbH
Abstract:Two types of laser cavities for mode locked solid-state laser are designed based on transmission matrix ABCD of line-style resonator and z-style resonator. By adopting these two types of cavities, mode-locked Nd:YAG laser side-pumped by diode laser was realized with semiconductor saturable absorber mirror. The highest output power is 1.5 W with the repetition rate of 250 MHz in the line-style cavity. In the z-style cavity, the highest output power is 1 W, and the repetition rate is about 100 MHz with the pulse duration of 200 ps. &copy; 2015 Elsevier GmbH. All rights reserved.
Number of references:7
Main heading:Semiconductor saturable absorber mirrors
Controlled terms:Laser mirrors - Locks (fasteners) - Mirrors - Mode-locked fiber lasers - Neodymium lasers - Pulse repetition rate - Pumping (laser) - Resonators - Saturable absorbers - Semiconductor lasers  - Solid state lasers
Uncontrolled terms:Mode lock - ND : YAG lasers - Nd: YAG - Output power - Pulse durations - Repetition rate - Side-pumped - Transmission matrix
Classification code:741.3  Optical Devices and Systems - 744  Lasers
DOI:10.1016/j.ijleo.2015.08.251

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 65>

Accession number:20150900578988
Title:Structured-patch optimization for dense correspondence
Authors:Qin, Xiameng (1); Shen, Jianbing (1); Mao, Xiaoyang (2); Li, Xuelong (3); Jia, Yunde (1)
Author affiliation:(1) Beijing Laboratory of Intelligent Information Technology, School of Computer Science, Beijing Institute of Technology, Beijing, China; (2) Interdisciplinary Graduate School of Medical and Engineering, University of Yamanashi, Kofu, Japan; (3) Center for Optical Imagery Analysis and Learning, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
Corresponding author:Shen, Jianbing
Source title:IEEE Transactions on Multimedia
Abbreviated source title:IEEE Trans Multimedia
Volume:17
Issue:3
Issue date:March 1, 2015
Publication year:2015
Pages:295-306
Article number:7017582
Language:English
ISSN:15209210
CODEN:ITMUF8
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:This paper presents a new method to compute the dense correspondences between two images by using the energy optimization and the structured patches. In terms of the property of the sparse feature and the principle that nearest sub-scenes and neighbors are much more similar, we design a new energy optimization to guide the dense matching process and find the reliable correspondences. The sparse features are also employed to design a new structure to describe the patches. Both transformation and deformation with the structured patches are considered and incorporated into an energy optimization framework. Thus, our algorithm can match the objects robustly in complicated scenes. Finally, a local refinement technique is proposed to solve the perturbation of the matched patches. Experimental results demonstrate that our method outperforms the state-of-the-art matching algorithms. &copy; 2015 IEEE.
Number of references:53
Main heading:Image matching
Controlled terms:Algorithms - Optimization
Uncontrolled terms:Dense correspondences - Energy optimization - features - Local refinement - match - Matching algorithm - State of the art - structured patch
Classification code:723  Computer Software, Data Handling and Applications - 741  Light, Optics and Optical Devices - 921  Mathematics - 921.5  Optimization Techniques
DOI:10.1109/TMM.2015.2395078

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 66>

Accession number:20152300916613
Title:Adaptive nonuniformity correction for infrared images based on temporal moment matching
Authors:Leng, Hanbing (1); Yi, Bo (1); Xie, Qingsheng (1); Tang, Li'nao (1); Gong, Zhendong (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; Shaanxi, China
Corresponding author:Leng, Hanbing
Source title:Guangxue Xuebao/Acta Optica Sinica
Abbreviated source title:Guangxue Xuebao
Volume:35
Issue:4
Issue date:April 10, 2015
Publication year:2015
Article number:0410003
Language:Chinese
ISSN:02532239
CODEN:GUXUDC
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:The response nonuniformity of uncooled infrared focal plane arrays is very similar to the stripe noise. Scene-based nonuniformity correction algorithm is an effective way to enhance the image quality and compensate the response drift. Based on the study of moment matching theory, a novel temporal moment matching nonuniformity correction algorithm is proposed. In the proposed algorithm, changing column is identified by the adjacent frames after moment matching, the correction coefficients are updated adaptively in temporal domain. The experimental results with the real infrared video sequences have shown that the proposed algorithm can significantly increase the convergence speed and reduce the ghosting artifacts. &copy;, 2015, Chinese Optical Society. All right reserved.
Number of references:15
Page count:6
Main heading:Image matching
Controlled terms:Algorithms - Focusing - Image processing - Infrared detectors - Infrared imaging
Uncontrolled terms:Convergence speed - Correction coefficients - Ghosting artifacts - Infrared focal plane arrays - Nonuniformity correction - Nonuniformity correction algorithm - Temporal moments - Uncooled infrared focal plane arrays
Classification code:723  Computer Software, Data Handling and Applications - 741  Light, Optics and Optical Devices - 746  Imaging Techniques - 921  Mathematics
DOI:10.3788/AOS201535.0410003

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 67>

Accession number:20150700509008
Title:Research on the high indium content InGaAs multiple quantum wells wafers for &lambda; &gt; 1.55 &mu;m laser diodes
Authors:Lin, Tao (1); Sun, Hang (1); Zhang, Haoqing (1); Wang, Yonggang (2); Lin, Nan (3); Ma, Xiaoyu (3)
Author affiliation:(1) Department of Electronic Engineering, Xi'An University of Technology, Xi'an, China; (2) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (3) Institute of Semiconductors, Chinese Academy of Sciences, Beijing, China
Corresponding author:Lin, Tao
Source title:Journal of Alloys and Compounds
Abbreviated source title:J Alloys Compd
Volume:631
Issue date:May 15, 2015
Publication year:2015
Pages:283-297
Language:English
ISSN:09258388
CODEN:JALCEU
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:The effects of TMIn flow rate and AsH<inf>3</inf>flow rate on the photoluminescence spectra of the high indium content InGaAs multiple quantum wells for &lambda; &gt; 1.55 &mu;m laser diodes have been investigated both experimentally and theoretically. The wavelength peak red-shifted about 4.8 nm for increasing 1 sccm H<inf>2</inf>flow rate through TMIn under a AsH<inf>3</inf>flow rate of 150 sccm, while the wavelength shift increases to 6.5 nm at a higher AsH<inf>3</inf>flow rate of 300 sccm. Results show that more AsH<inf>3</inf>flow rate will promote much TMGa pyrolysis than TMIn in the high indium content InGaAs growth. Considering the influence of growth parameters, the longest wavelength of 1.889 &mu;m among the InGaAs/InGaAsP strained MQWs samples was obtained with high crystal quality. &copy;2015 Elsevier B.V. All rights reserved.
Number of references:16
Main heading:Semiconductor quantum wells
Controlled terms:Diodes - Flow rate - Indium - Metallorganic chemical vapor deposition - Photoluminescence - Quantum well lasers - Semiconducting indium - Semiconducting indium compounds - Semiconductor lasers
Uncontrolled terms:Crystal qualities - GaAs - Growth parameters - High indium contents - InGaAs/InGaAsP - InP - Photoluminescence spectrum - Wavelength shift
Classification code:549.3  Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 631  Fluid Flow - 712  Electronic and Thermionic Materials - 714.2  Semiconductor Devices and Integrated Circuits - 741.1  Light/Optics - 744.1  Lasers, General - 802.2  Chemical Reactions
DOI:10.1016/j.jallcom.2015.01.120

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 68>

Accession number:20153001069180
Title:Degradation of high power single emitter laser modules using nanosilver paste in continuous pulse conditions
Authors:Yan, Haidong (1, 2); Mei, Yunhui (1, 2); Li, Xin (2); Zhang, Pu (3); Lu, Guo-Quan (4)
Author affiliation:(1) Key Laboratory of Advanced Ceramics and Machining Technology, Ministry of Education, Tianjin University, Tianjin, China; (2) Tianjin Key Laboratory of Advanced Joining Technology, School of Materials Science and Engineering, Tianjin University, Tianjin, China; (3) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, China; (4) Department of Materials Science and Engineering, Virginia Tech, Blacksburg; VA, United States
Corresponding author:Mei, Yunhui(yunhui@tju.edu.cn)
Source title:Microelectronics Reliability
Abbreviated source title:Microelectron. Reliab.
Volume:55
Issue:12
Issue date:December 1, 2015
Publication year:2015
Pages:2532-2541
Language:English
ISSN:00262714
CODEN:MCRLAS
Document type:Conference article (CA)
Publisher:Elsevier Ltd
Abstract:This paper is mainly reported to a pulse reliability investigation of high power single emitter laser modules with nanosilver paste. Comparative experiments in continuous pulse conditions for the laser modules packaged with nanosilver paste, indium and AuSn solders were conducted. The results indicate that the laser modules attached by nanosilver paste have a longer-term lifetime than those with indium and AuSn solders in continuous pulse conditions. Transient thermal behavior and coupled thermo-mechanical behavior in continuous pulse conditions are simulated by finite element method (FEM). A semi-empirical model based on Arrhenius relationship is established to provide relative reliability assessments for laser modules by combining with the simulating results. &copy; 2015 Elsevier Ltd. All rights reserved.
Number of references:36
Main heading:Finite element method
Controlled terms:Indium - Reliability - Tin alloys
Uncontrolled terms:Comparative experiments - Coupled thermo-mechanical behaviors - Die-attach - Laser modules - Nano-silver pastes - Pulse modes - Reliability assessments - Reliability investigations
DOI:10.1016/j.microrel.2015.07.037

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 69>

Accession number:20152300916622
Title:Er&lt;sup&gt;3+&lt;/sup&gt;: 'water-free' fluorotellurite glass waveguides written by femtosecond laser
Authors:Liu, Shuang (1, 2); Tang, Wenlong (1, 2); Cheng, Guanghua (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; Shaanxi, China; (2) University of Chinese Academy of Sciences, Beijing, China
Corresponding author:Cheng, Guanghua
Source title:Guangxue Xuebao/Acta Optica Sinica
Abbreviated source title:Guangxue Xuebao
Volume:35
Issue:4
Issue date:April 10, 2015
Publication year:2015
Article number:0413001
Language:Chinese
ISSN:02532239
CODEN:GUXUDC
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:By femtosecond laser with repetition rate of 1 kHz, central wavelength of 800 nm and pulse width of 120 fs, Type I (single line) and depressed circular cladding waveguides in Er&lt;sup&gt;3+&lt;/sup&gt; doped 'water-free' fluorotellurite glass are transversely written with slit shaping technology, respectively. The impact of the processing conditions on the waveguides' formation is systematically studied, and the waveguides with better guiding mode are obtained. Refractive index profile is reconstructed by intensity distribution of the near-field mode, and the largest positive refractive index change for Type I waveguide is about 1&times;10&lt;sup&gt;-4&lt;/sup&gt;, slightly smaller than that (1.9&times;10&lt;sup&gt;-4&lt;/sup&gt;) of depressed cladding waveguide. By using the scattering technique, the propagation loss of Type I waveguide is about 1.04 dB/cm. The loss of depressed cladding waveguide is less than 1.88 dB/cm by measuring insertion loss. Therefore, Er&lt;sup&gt;3+&lt;/sup&gt; doped 'water-free' fluorotellurite glass waveguides inscribed by femtosecond laser are promising candidates for the development of integrated laser resources. &copy;, 2015, Chinese Optical Society. All right reserved.
Number of references:26
Page count:7
Main heading:Waveguides
Controlled terms:Erbium - Glass - Integrated optics - Optical waveguides - Pulse repetition rate - Pulse shaping - Refractive index - Ultrashort pulses
Uncontrolled terms:Femtosecond laser writing - Fluoro-tellurite glass - Intensity distribution - Processing condition - Refractive index changes - Refractive index profiles - Scattering techniques - Shaping technologies
Classification code:547.2  Rare Earth Metals - 713.4  Pulse Circuits - 714.3  Waveguides - 741.1  Light/Optics - 741.3  Optical Devices and Systems - 744.1  Lasers, General - 812.3  Glass
DOI:10.3788/AOS201535.0413001

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 70>

Accession number:20160701912145
Title:Representative and diverse video summarization
Authors:Chen, Xiao (1, 2); Li, Xuelong (1); Lu, Xiaoqiang (1)
Author affiliation:(1) Center for OPTical IMagery Analysis and Learning (OPTIMAL), State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xi'an, Shaanxi, China; (2) University of the Chinese Academy of Sciences, 19A Yuquanlu, Beijing, China
Corresponding author:Lu, Xiaoqiang
Source title:2015 IEEE China Summit and International Conference on Signal and Information Processing, ChinaSIP 2015 - Proceedings
Abbreviated source title:IEEE China Summit Int. Conf. Signal Inf. Process., ChinaSIP - Proc.
Monograph title:2015 IEEE China Summit and International Conference on Signal and Information Processing, ChinaSIP 2015 - Proceedings
Issue date:August 31, 2015
Publication year:2015
Pages:142-146
Article number:7230379
Language:English
ISBN-13:9781479919482
Document type:Conference article (CA)
Conference name:IEEE China Summit and International Conference on Signal and Information Processing, ChinaSIP 2015
Conference date:July 12, 2015  -  July 15, 2015
Conference location:Chengdu, China
Conference code:117267
Sponsor:Institute of Electrical and Electronics Engineers Signal Processing Society (SPS)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:Video summarization usually refers to produce a summary preserving essential content of the original video. Many existing methods have been developed to select representative frames by a dictionary learning model, which have led to a state-of-The-Art performance. However, learning dictionary without considering relationship between samples of the original data space would lead to imprecise representation. To address this problem, in this paper, geometrical distribution information of samples is incorporated into the dictionary learning process. A graph based learning strategy is employed to draw the geometrical distribution information. Meanwhile, the diversity criteria is considered as important as representativeness, which can reduce redundant frames to be selected in final summary. Thus similarity measuring is imported to guarantee that a final summary contains diversity contents within the original video. The proposed method is validated on a challenging and widely used dataset, and state-of-The-Art performance is achieved in contrast to other methods. &copy; 2015 IEEE.
Number of references:23
Main heading:Video recording
Controlled terms:Graphic methods - Information science - Learning systems - Video signal processing
Uncontrolled terms:Consumer videos - Dictionary learning - Sparse representation - Structural information - Video summarization
Classification code:716.4  Television Systems and Equipment
DOI:10.1109/ChinaSIP.2015.7230379

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 71>

Accession number:20150300435841
Title:A non-uniformity correction algorithm based on single infrared image
Authors:Wang, Jihong (1, 2); Zhou, Zuofeng (1); Leng, Hanbing (1); Wu, Qingquan (1, 2)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an, China; (2) The University of Chinese Academy of Sciences, Beijing, China
Corresponding author:Wang, Jihong
Source title:Journal of Information and Computational Science
Abbreviated source title:J. Inf. Comput. Sci.
Volume:12
Issue:1
Issue date:January 1, 2015
Publication year:2015
Pages:101-110
Language:English
ISSN:15487741
Document type:Journal article (JA)
Publisher:Binary Information Press
Abstract:To overcome the shortcoming that most of the recent Non-uniformity Correction (NUC) algorithms which need a large number of underlying images, a non-uniformity correction method based on single infrared image is proposed. In the proposed method, the moment matching algorithm is used to correct the non-uniformity image to get the pilot image. Then, the banding occurring in the pilot image is removed by the local weighted-histogram specification algorithm to get the final result. Experiment results show the effectiveness of the proposed non-uniformity correction algorithm.
Number of references:19
Main heading:Image matching
Controlled terms:Algorithms - Graphic methods - Infrared imaging - Specifications
Uncontrolled terms:Histogram specifications - Moment-matching - Non-uniformities - Nonuniformity correction - NUC - Weighted histogram
Classification code:723  Computer Software, Data Handling and Applications - 723.5  Computer Applications - 741  Light, Optics and Optical Devices - 746  Imaging Techniques - 902.1  Engineering Graphics - 902.2  Codes and Standards - 921  Mathematics
DOI:10.12733/jics20105118

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 72>

Accession number:20160401852689
Title:Optical tracking platform based on umbrella multi-tier distributed structure
Authors:Qiao, Yongming (1, 2); Ma, Caiwen (2); Jin, Humin (2); Hao, Wei (2); Lv, Tao (2)
Author affiliation:(1) University of Chinese Academy of Sciences, Beijing, China; (2) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering
Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.
Volume:44
Issue:12
Issue date:December 25, 2015
Publication year:2015
Pages:3673-3677
Language:Chinese
ISSN:10072276
Document type:Journal article (JA)
Publisher:Chinese Society of Astronautics
Abstract:The basic features that should be possessed are detecting long-distance target, capturing rapid target and tracking multiple target for a high-performance optical warning system. It is the basic condition to achieve the whole airspace closure detection. Due to inherent structural defects, there are some problems in the application of early warning for traditional optical tracking platform. A new concept of structure called umbrella multi-tier distributed load structure was proposed that was fitted in photoelectric tracking platform applied in optical warning. Through the structural feature of the new type of tracking platform, combining with measurement-mode plan of multi-detector, optimizing control and information processing system, it aims to solve the problems effectively that restricts the performance for optical warning system, such as the small searching field-goal; single target tracking; the top blind of tracking. It will break the bottleneck of optical tracking device application in optical warning system. &copy; 2015, Editorial Board of Journal of Infrared and Laser Engineering. All right reserved.
Number of references:8
Main heading:Target tracking
Controlled terms:Clutter (information theory) - Feature extraction - Search engines - Tracking (position)
Uncontrolled terms:Distributed structures - Information processing systems - Multi-target tracking - Optical field - Optical warning - Optimizing control - Single target tracking - Structural feature
Classification code:716.1  Information Theory and Signal Processing - 723  Computer Software, Data Handling and Applications

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 73>

Accession number:20154601546828
Title:Angle measurement error correction of vehicle-borne theodolite based on the rotation of plane equation
Authors:Jiang, Bo (1); Mei, Chao (1); Liang, Yuanqing (1, 2); Jiang, Kai (1); Zhou, Sizhong (1)
Author affiliation:(1) The Photoelectric Measurement and Control Technology Research Department, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; Shaanxi, China; (2) University of Chinese Academy of Sciences, Beijing, China
Source title:Guangxue Xuebao/Acta Optica Sinica
Abbreviated source title:Guangxue Xuebao
Volume:35
Issue date:July 10, 2015
Publication year:2015
Article number:s112002
Language:Chinese
ISSN:02532239
CODEN:GUXUDC
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:The base-platform deformation and uneven of vehicle-borne photoelectric theodolite can lead to the theodolite angle measurement error larger than before. In order to improve the precision, the error should be corrected. With the level measurement meter, the angle of the platform and the horizontal plane can be measured. Based on the measurement results, an analytic geometry method of plane rotation changes is put forward for converting the results to the vertical axis tilt angle and azimuth tilt angle, and then the alignment error is analyzed, which is caused by the calculation method during measurement. At last, the relationships of composition error, alignment error, and the tilt of the platform are analyzed. The simulation and experimental results show that, within the vehicle leveling accuracy of 300&Prime;, the vehicle-borne theodolite comprehensive angle error is less than 16&Prime;, and the high precision measurement can be realized. &copy;, 2015, Chinese Optical Society. All right reserved.
Number of references:12
Page count:6
Main heading:Errors
Controlled terms:Angle measurement - Error correction - Measurement errors - Optical data processing - Photoelectricity - Vehicles
Uncontrolled terms:Analytic geometries - High-precision measurement - Method of planes - Optical measurement - Photoelectric theodolite - Tilt angle measurement - Vehicle-borne - Vertical axis
Classification code:701.1  Electricity: Basic Concepts and Phenomena - 723.2  Data Processing and Image Processing - 943.2  Mechanical Variables Measurements
DOI:10.3788/AOS201535.s112002

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 74>

Accession number:20154801602889
Title:Interval-Valued intuitionistic fuzzy prioritized ordered weighted averaging operator and its application in threat assessment
Authors:Wu, Hua (1, 2); Su, Xiuqin (1)
Author affiliation:(1) Key Laboratory of Ultrafast Photoelectric Diagnostics Technology, Xi&rsquo;an Institute of Optics and Precision Mechanics of Chinese, Academy of Sciences, Xi&rsquo;an, China; (2) University of Chinese Academy of Sciences, Beijing, China
Corresponding author:Wu, Hua(sunshinesmilewh@gmail.com)
Source title:Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Abbreviated source title:Lect. Notes Comput. Sci.
Volume:9141
Monograph title:Advances in Swarm and Computational Intelligence - 6th International Conference, ICSI 2015 held in conjunction with the 2nd BRICS Congress, CCI 2015, Proceedings
Issue date:2015
Publication year:2015
Pages:16-24
Language:English
ISSN:03029743
E-ISSN:16113349
ISBN-13:9783319204710
Document type:Conference article (CA)
Conference name:6th International Conference on Swarm Intelligence, ICSI 2015 held in conjunction with the 2nd BRICS Congress on Computational Intelligence, CCI 2015
Conference date:June 25, 2015  -  June 28, 2015
Conference location:Beijing, China
Conference code:157109
Sponsor:Peking University; Xian Jiaotong-Liverpool University
Publisher:Springer Verlag
Abstract:The threat assessment of aerial targets is the basic method for improving the ability of air defense system to deal with multiple objects in complex environment. Considering both the uncertain and imprecise information and prioritization relationship of attributes, we propose an interval-valued intuitionistic fuzzy prioritized ordered weighted averaging (IVIF-POWA) operator-based threat assessment model. The contribution of this paper is twofold: 1) An IVIF-POWA operator is proposed, which expresses the imprecise and uncertain information with more suitable interval-valued intuitionistic fuzzy sets. 2) This work proposes a simple yet effective threat assessment model based on IVIF-POWA operator. Its efficiency and effectiveness are validated by comparing it with some popular operators in a numerical example. &copy; Springer International Publishing Switzerland 2015.
Number of references:21
Main heading:Fuzzy sets
Controlled terms:Artificial intelligence - Statistical methods
Uncontrolled terms:Complex environments - Imprecise information - Interval-valued intuitionistic fuzzy sets - Ordered weighted averaging - Ordered weighted averaging operator - Prioritization relationships - Threat assessment models - Uncertain informations
Classification code:723.4  Artificial Intelligence - 922.2  Mathematical Statistics
DOI:10.1007/978-3-319-20472-7_2

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 75>

Accession number:4757345
Title:In situ optical measurements of Chang'E-3 landing site in Mare Imbrium: 1. Mineral abundances inferred from spectral reflectance
Authors:Zhang, Hao (1); Yang, Yazhou (1); Yuan, Ye (1); Jin, Weidong (1); Lucey, Paul G. (2); Zhu, Meng-Hua (3); Kaydash, Vadim G. (4); Shkuratov, Yuriy G. (4); Di, Kaichang (5); Wan, Wenhui (5); Xu, Bin (5); Xiao, Long (1); Wang, Ziwei (1); Xue, Bin (6)
Author affiliation:(1) Planetary Science Institute, School of Earth Sciences, China University of Geosciences, Wuhan, China; (2) Hawaii Institute of Geophysics and Planetology, University of Hawaii, Honolulu; HI, United States; (3) Space Science Institute, Macau University of Science and Technology, Taipa, China; (4) Astronomical Institute, Kharkov V.N. Karazin National University, Kharkov, Ukraine; (5) State Key Laboratory of Remote Sensing Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing, China; (6) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
Corresponding author:Zhang, Hao
Source title:Geophysical Research Letters
Abbreviated source title:Geophys. Res. Lett.
Volume:42
Issue:17
Issue date:September 16, 2015
Publication year:2015
Pages:6945-6950
Language:English
ISSN:00948276
E-ISSN:19448007
CODEN:GPRLAJ
Document type:Journal article (JA)
Publisher:Blackwell Publishing Ltd
Abstract:The visible and near-infrared imaging spectrometer on board the Yutu Rover of Chinese Chang'E-3 mission measured the lunar surface reflectance at a close distance (&sim;1 m) and collected four spectra at four different sites. These in situ lunar spectra have revealed less mature features than that measured remotely by spaceborne sensors such as the Moon Mineralogy Mapper instrument on board the Chandrayaan-1 mission and the Spectral Profiler on board the Kaguya over the same region. Mineral composition analysis using a spectral lookup table populated with a radiative transfer mixing model has shown that the regolith at the landing site contains high abundance of olivine. The mineral abundance results are consistent with that inferred from the compound measurement made by the on board alpha-particle X-ray spectrometer. &copy;2015. American Geophysical Union. All Rights Reserved.
Number of references:26
Controlled terms:in situ measurement - lunar phase - mineral alteration - olivine - radiative transfer - reflectance - remote sensing - spectral analysis - visible spectrum
Classification code:72.17.2  Other planets
DOI:10.1002/2015GL065273

Database:GEOBASE
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 76>

Accession number:20160401852703
Title:Thermal design and analysis for fiber optic gyroscope combination
Authors:Liu, Ying (1); Fan, Yongqing (1); Xu, Jintao (2)
Author affiliation:(1) School of Automation, Xi'an University of Posts and Telecommunications, Xi'an, China; (2) Center of Fiber Optic Inertial Measure and Sensor Engineering, Xi'an Institute of Optics and Precision Mechanics of Chinese Academy Science, Xi'an, China
Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering
Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.
Volume:44
Issue:12
Issue date:December 25, 2015
Publication year:2015
Pages:3750-3754
Language:Chinese
ISSN:10072276
Document type:Journal article (JA)
Publisher:Chinese Society of Astronautics
Abstract:In order to meet the requirements of environmental temperature, complete quickly and reliably the design scheme of FOG combination, the thermal design and analysis of FOG combination were carried out. The combination model and finite element model were established, the boundary conditions and constraints conditions were set, the temperature and the reliability of the key components and assemblies of the combination FOG were analyzed in entire temperature cycles. Finally, the maximum temperature of DSP was reduced by 10, the maximum temperature of DC/DC power modules was from the original 90 down to 70, the all critical components and assemblies were working within their rated temperature range through the way of thermal design, the uniformity of fiber optic gyroscope combination of internal temperature field was improved, from the original 30 down to 10, a basis was provided to determine the design of scheme. &copy; 2015, Editorial Board of Journal of Infrared and Laser Engineering. All right reserved.
Number of references:11
Main heading:Gyroscopes
Controlled terms:DC-DC converters - Design - Fiber optics - Finite element method - Thermoanalysis
Uncontrolled terms:Constraints conditions - Critical component - Environmental temperature - Fiber optic gyro - Fiber optic gyroscopes - Internal temperature - Maximum temperature - Thermal designs
Classification code:704.1  Electric Components - 741.1.2  Fiber Optics - 801  Chemistry - 921.6  Numerical Methods

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 77>

Accession number:20154201394493
Title:Linkage of Dual Frequency Combs Based on All Polarization-Maintaining Femtosecond Fiber Lasers
Authors:Xu, Xin (1); Feng, Ye (1); Liu, Yuanshan (1); Hu, Xiaohong (1); Li, Feitao (1); Zhang, Ting (1); Zhang, Wei (1); Yang, Zhi (1); Cheng, Zhao (2); Zhao, Wei (1); Wang, Yishan (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) FEMTOLASERS Produktions Gmbh, Vienna, Austria
Corresponding author:Liu, Yuanshan
Source title:IEEE Photonics Technology Letters
Abbreviated source title:IEEE Photonics Technol Lett
Volume:27
Issue:23
Issue date:December 1, 2015
Publication year:2015
Pages:2421-2424
Article number:7181670
Language:English
ISSN:10411135
CODEN:IPTLEL
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:Perfect linkage of dual frequency combs based on all polarization-maintaining femtosecond fiber lasers is demonstrated. By employing two independent tracking feedback controlling circuits, the repetition frequency (f<inf>r</inf>) and the carrier-envelope offset frequency (f<inf>ceo</inf>) of the slave frequency comb track the master's f<inf>r</inf>and f<inf>ceo</inf>, respectively. The correlation coefficients of the dual f<inf>r</inf>'s and the dual f<inf>ceo</inf>'s are up to 0.99 and 0.98, which indicate an ideal linkage between the dual frequency combs. To the best of our knowledge, this is the first report about linkage of dual frequency combs. &copy; 2015 IEEE.
Number of references:12
Main heading:Polarization-maintaining fiber
Controlled terms:Fiber lasers - Polarization - Supercontinuum generation
Uncontrolled terms:Carrier envelope offset frequencies - Correlation coefficient - Dual frequency - Femtosecond fiber lasers - Frequency combs - Polarization maintaining - Repetition frequency - Ultrafast optics
Classification code:741.1.1  Nonlinear Optics - 741.1.2  Fiber Optics - 744.4  Solid State Lasers
DOI:10.1109/LPT.2015.2462080

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 78>

Accession number:20155201719070
Title:Experiments of ghost imaging with pseudo-thermal light for remote sensing applications
Authors:Kang, Zhihua (2); Ma, Lin (2); Kang, Yan (1); Yao, Yinping (1); Zhang, Tongyi (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) School of Physics and Optoelectronic Engineering, Xidian University, Xi'an, China
Corresponding author:Zhang, Tongyi(tyzhang@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9674
Monograph title:AOPC 2015: Optical and Optoelectronic Sensing and Imaging Technology
Issue date:2015
Publication year:2015
Article number:96742U
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628418996
Document type:Conference article (CA)
Conference name:Applied Optics and Photonics, China: Optical and Optoelectronic Sensing and Imaging Technology, AOPC 2015
Conference date:May 5, 2015  -  May 7, 2015
Conference location:Beijing, China
Conference code:117013
Sponsor:Chinese Society for Optical Engineering
Publisher:SPIE
Abstract:Based on previous researches, we construct a pseudo-thermal light ghost imaging system suited for remote imaging applications. By using pulsed pseudo-thermal light, the transmitted power is improved to ghost imaging long distant targets. By using imaging lens system, the path lengths of reference and signal light need not keep equal, as in lensless ghost imaging system, thus the transmitter, receiver, and correlator circuit can be integrated and keep compact. Furthermore, the revolution is improved by reducing the sizes of speckles. And the number of imaging frames is decreased (thus reduced the image-reconstruct time) and the signal-noise-ratio of ghost image is improved by compressed sensing. Based on the constructed experimental system, we implemented ghost imaging of a target at about 30m range. &copy; 2015 SPIE.
Number of references:20
Main heading:Imaging techniques
Controlled terms:Compressed sensing - Image processing - Imaging systems - Light - Optical resolving power - Remote sensing - Signal receivers - Signal reconstruction
Uncontrolled terms:Experimental system - Ghost imaging - Remote imaging - Remote sensing applications - Signal light - Signal-noise ratio - Thermal light - Transmitted power
Classification code:716.1  Information Theory and Signal Processing - 741.1  Light/Optics - 746  Imaging Techniques
DOI:10.1117/12.2202795

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 79>

Accession number:20151400703810
Title:Coexistence of conventional solitons and stretched pulses in a fiber laser mode-locked by carbon nanotubes
Authors:Li, W.L. (1); Kong, Y.C. (1); Chen, G.W. (1); Yang, H.R. (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
Source title:Laser Physics
Abbreviated source title:Laser Phys.
Volume:25
Issue:4
Issue date:April 1, 2015
Publication year:2015
Pages:1-5
Article number:045103
Language:English
ISSN:1054660X
E-ISSN:15556611
Document type:Journal article (JA)
Publisher:Institute of Physics Publishing
Abstract:We have proposed a nanotube-mode-locking fiber laser that can generate conventional solitons and stretched pulses in the same cavity. The net cavity dispersion of laser is slightly negative. The central wavelength and bandwidth of the conventional solitons are 1584.7 and 9.2 nm, respectively. The stretched pulse locates at 1572 nm with a bandwidth of 18.8 nm. The switchable mode-locking operation is mainly attributable to the bandwidth-dependent stretching factor that is tunable due to the spectral filtering effect induced by nonlinear polarization rotation. &copy; 2015 Astro Ltd.
Number of references:86
Main heading:Mode-locked fiber lasers
Controlled terms:Bandwidth - Carbon - Carbon nanotubes - Fiber lasers - Laser mode locking - Locks (fasteners) - Solitons - Yarn
Uncontrolled terms:Central wavelength - Filter - Mode-locking fiber laser - Nonlinear polarization rotation - Spectral filtering - Switchable
Classification code:601.3  Mechanisms - 716.1  Information Theory and Signal Processing - 744.1  Lasers, General - 744.4  Solid State Lasers - 761  Nanotechnology - 804  Chemical Products Generally - 819.4  Fiber Products - 931.3  Atomic and Molecular Physics
DOI:10.1088/1054-660X/25/4/045103

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 80>

Accession number:20154701590934
Title:Device-free mobile target tracking using passive tags
Authors:Ding, Han (1); Xi, Min (1); Li, Zhe (2); Zhao, Jizhong (3)
Author affiliation:(1) School of Electronic and Information Engineering, Xi'An Jiaotong University, Xi'an, China; (2) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an, China; (3) School of Software Engineering, Xi'An Jiaotong University, Xi'an, China
Corresponding author:Xi, Min(ximin.xjtu@gmail.com)
Source title:International Journal of Distributed Sensor Networks
Abbreviated source title:Int. J. Distrib. Sens. Netw.
Volume:2015
Issue date:2015
Publication year:2015
Article number:870204
Language:English
ISSN:15501329
E-ISSN:15501477
Document type:Journal article (JA)
Publisher:Hindawi Publishing Corporation, 410 Park Avenue, 15th Floor, 287 pmb, New York, NY 10022, United States
Abstract:We propose a low-cost device-free mobile target tracking system using passive tags, namely, DTrack, to detect and track a human object in a certain surveillance area. The idea is that when a human object moves, he may block or reflect the RF signals between the reader and tags. Based on the estimation of Doppler Shift and Tag Read Rate variations, DTrack can detect whether a human object enters in the system and further track the moving direction of the object. DTrack uses commercial readers and off-the-shelf passive tags and is scalable and easy for large-scale deployments. Experimental results show that our system is effective in detecting the direction of moving human objects with high accuracy. &copy; 2015 Han Ding et al.
Number of references:25
Main heading:Target tracking
Controlled terms:Clutter (information theory) - Object detection - Tracking (position)
Uncontrolled terms:Device-free - High-accuracy - Large-scale deployment - Low-cost devices - Mobile targets - Moving direction - Passive tags - Rate variation
Classification code:716.1  Information Theory and Signal Processing - 723.2  Data Processing and Image Processing
DOI:10.1155/2015/870204

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 81>

Accession number:20152801025622
Title:Graded index porous optical fibers-dispersion management in terahertz range
Authors:Ma, Tian (1, 2); Markov, Andrey (1); Wang, Lili (1, 2); Skorobogatiy, Maksim (1)
Author affiliation:(1) &Eacute;cole Polytechnique de Montr&eacute;al, Montreal; QC, Canada; (2) Xi'An Institute of Optics and Precision Mechanics of CAS, Xi'an, Shannxi, China
Source title:Optics Express
Abbreviated source title:Opt. Express
Volume:23
Issue:6
Issue date:March 23, 2015
Publication year:2015
Pages:7856-7869
Language:English
E-ISSN:10944087
Document type:Journal article (JA)
Publisher:Optical Society of American (OSA)
Abstract:A graded index porous optical fiber incorporating an air-hole array featuring variable air-hole diameters and inter-hole separations is proposed, fabricated, and characterized in a view of the fiber potential applications in low-loss, low-dispersion terahertz guidance. The proposed fiber features simultaneously low modal and intermodal dispersions, as well as low loss in the terahertz spectral range. We experimentally demonstrate that graded index porous fibers exhibit smaller pulse distortion, larger bandwidth, and higher excitation efficiency when compared to fibers with uniform porosity. &copy; 2015 OSA.
Number of references:44
Main heading:Fibers
Controlled terms:Air navigation - Optical fiber fabrication - Optical fibers
Uncontrolled terms:Air-hole arrays - Dispersion management - Excitation efficiency - Inter-modal dispersions - Low dispersions - Pulse distortion - Terahertz range - Terahertz spectral range
Classification code:431.5  Air Navigation and Traffic Control - 741.1.2  Fiber Optics - 812  Ceramics, Refractories and Glass - 817  Plastics and Other Polymers: Products and Applications
DOI:10.1364/OE.23.007856

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 82>

Accession number:20151600747553
Title:Enhanced slow light in microfiber double-knot resonator with a Sagnac loop reflector
Authors:Xu, Yiping (1, 2); Ren, Liyong (1); Wang, Yingli (1); Kong, Xudong (1, 2); Liang, Jian (1); Ren, Kaili (1, 2); Lin, Xiao (1, 2)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China
Corresponding author:Ren, Liyong
Source title:Optics Communications
Abbreviated source title:Opt Commun
Volume:350
Issue date:September 1, 2015
Publication year:2015
Pages:148-153
Language:English
ISSN:00304018
CODEN:OPCOB8
Document type:Journal article (JA)
Publisher:Elsevier
Abstract:We propose a theoretical model to describe the light-propagation property of the microfiber double-knot resonator with a Sagnac loop reflector. The mathematical relationships between the reflection light field and the input one of this structure are deduced. Numerical simulations indicate that, comparing with the group time delay in the microfiber double-knot resonator, the one in the same resonator but with a Sagnac loop reflector can be enhanced considerably. For comparison, microfiber double-knot resonators with and without a Sagnac loop reflector are both fabricated. Corresponding comparison experiments are performed, which indeed demonstrates the theoretical prediction. A group time delay of about 61 ps is achieved experimentally in the resonator with a Sagnac loop reflector, while in the same resonator but without a Sagnac loop reflector it is only about 30 ps. &copy; 2015 Elsevier B.V. All rights reserved.
Number of references:34
Main heading:Slow light
Controlled terms:Group delay - Reflection - Resonators - Time delay
Uncontrolled terms:Light fields - Mathematical relationship - Micro-fiber - Propagation properties - Sagnac loop - Theoretical modeling
Classification code:703.1  Electric Networks - 713  Electronic Circuits - 714  Electronic Components and Tubes - 731  Automatic Control Principles and Applications - 741.1  Light/Optics
DOI:10.1016/j.optcom.2015.04.027

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 83>

Accession number:20154401462148
Title:Demarcation of 8-inch micro-channel plate photo-multiplier tube
Authors:Chen, Yaling (1, 2); Tian, Jinshou (1); Xin, Liwei (1); Liu, Hulin (1); Wei, Yonglin (1); Wang, Xing (1); Chen, Lin (1, 2); Chen, Ping (1, 2)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) Graduate University of Chinese Academy of Sciences, Beijing, China
Corresponding author:Chen, Yaling
Source title:Zhenkong Kexue yu Jishu Xuebao/Journal of Vacuum Science and Technology
Abbreviated source title:Zhenkong Kexue yu Jishu Xuebao
Volume:35
Issue:10
Issue date:October 1, 2015
Publication year:2015
Pages:1163-1168
Language:Chinese
ISSN:16727126
CODEN:CKKSDV
Document type:Journal article (JA)
Publisher:Science Press
Abstract:A dedicated single photoelectron spectrometer was developed to evaluate and demarcate the characteristics of the 8-inch micro-channel plate photo-multiplier tube (MCP-PMT), including but not limited to the gain and peak-to-valley voltage ratio (P/V) of a single photoelectron spectrum and uniformity of the photocathode. The analogue signal of charges was digitized with high precision charge-to-digital converter (QDC); the single photoelectron spectrum was obtained by integrating the digitized charge spectrum with VME data-acquisition software; and the photoelectron I-V flat curve at a specific point of the photocathode were evaluated with the current-sampling module of software LABVIEW. The results show that the gain and P/V ratio of the 8-inch MCP-PMT single photoelectron spectrum were 2.5233&times;10<sup>7</sup>and above 2.78, respectively, under the operation conditions: a voltage of 2000 V, a pulse-width of 10 ns, a sampling-frequency of 1 kHz, and with LED light-source powered at 1.735 V. Moreover, the photocathode uniformity was estimated to be lower than 10%, satisfying the requirement for neutrino detection. &copy;, YYYY, Science Press. All right reserved.
Number of references:4
Main heading:Image storage tubes
Controlled terms:Computer programming languages - Data acquisition - Light emitting diodes - Light sources - Photocathodes - Photoelectron spectroscopy - Photoelectrons - Photomultipliers - Photons - Positron emission tomography  - Spectrometers
Uncontrolled terms:Data acquisition softwares - MCP-PMT - Operation conditions - Photo multiplier tube - QDC - Sampling frequencies - Single photoelectrons - Uniformity
Classification code:714.1  Electron Tubes - 714.2  Semiconductor Devices and Integrated Circuits - 723.1.1  Computer Programming Languages - 723.2  Data Processing and Image Processing - 741.3  Optical Devices and Systems - 931.3  Atomic and Molecular Physics
DOI:10.13922/j.cnki.cjovst.2015.10.01

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 84>

Accession number:20151700778586
Title:Carbon-nanotube-based passively mode-locked fiber lasers modulated with sub-loop
Authors:Cui, Yudong (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
Corresponding author:Cui, Yudong
Source title:Optik
Abbreviated source title:Optik
Volume:126
Issue:6
Issue date:March 1, 2015
Publication year:2015
Pages:618-621
Language:English
ISSN:00304026
Document type:Journal article (JA)
Publisher:Urban und Fischer Verlag Jena
Abstract:We have proposed a carbon-nanotube-based passively mode-locked fiber laser, which consists of two fiber ring resonators, for the first time to author's best knowledge. The proposed laser in the main cavity is coupled with a fiber sub-loop, which is connected with a 2 &times; 2 optical coupler. Without the sub-loop, uniform-spaced conventional solitons are achieved in the fiber ring laser. With the sub-loop, the fiber laser generates a train of pulses modulated with a periodic envelop. The modulation period and pulse-pulse separation are &sim;160 and &sim;4.3 ns, which are determined by the lengths of the main cavity and the sub-loop, respectively. &copy; 2015 Elsevier GmbH. All rights reserved.
Number of references:43
Main heading:Mode-locked fiber lasers
Controlled terms:Carbon - Fiber lasers - Fibers - Laser mode locking - Locks (fasteners) - Modulation - Passive mode locking - Pulse generators - Ring lasers - Single-walled carbon nanotubes (SWCN)  - Solitons - Yarn
Uncontrolled terms:A-train - Fiber ring resonators - Fiber-ring lasers - Modulation period - Optical coupler - Passively mode-locked fiber lasers - Pulse separations
Classification code:601.3  Mechanisms - 713.4  Pulse Circuits - 716  Telecommunication; Radar, Radio and Television - 717  Optical Communication - 718  Telephone Systems and Related Technologies; Line Communications - 744  Lasers - 761  Nanotechnology - 804  Chemical Products Generally - 819.4  Fiber Products - 931.3  Atomic and Molecular Physics
DOI:10.1016/j.ijleo.2015.02.002

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 85>

Accession number:20155201714903
Title:A new design of filter system in streak camera
Authors:Zhou, Pengyu (1, 2); Bai, Yonglin (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9677
Monograph title:AOPC 2015: Optical Test, Measurement, and Equipment
Issue date:2015
Publication year:2015
Article number:967716
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628419023
Document type:Conference article (CA)
Conference name:Applied Optics and Photonics, China: Optical Test, Measurement, and Equipment, AOPC 2015
Conference date:May 5, 2015  -  May 7, 2015
Conference location:Beijing, China
Conference code:117015
Sponsor:Chinese Society for Optical Engineering
Publisher:SPIE
Abstract:In order to reduce the frequency of researchers routing in and out of the testing site and ensure the fluency of the testing we design a new filter system applied to the streak cameras. This system promotes streak cameras' abilities on spatial discrimination and time resolution. This paper focuses on the instruction of the piezoelectric motor's principle based on field-effect tubes. Filter wheel is driven by piezoelectric motor. It can effectively avoid the influences of high field produced by streak tube. Finally we achieve auto regulation at different gears and promote the efficiency of operations and guarantee the safety of researchers. CD4046 introduces the driven clock of this system and we use an inverter to get two synchronous inverted signals. These signals are amplified by field-effect tubes to more than 300V. The amplified ones are integrated at the output terminals to generate sinusoidal signal. The test shows that in this filter system piezoelectric motor operates at its resonance frequency under a control signal of 62.5 KHz. Its working current is 1.9A and driving power is almost 10W. By adjusting the gears, the filter wheel costs less than 2 seconds to calibrate. We accomplish the test in respected results. &copy; COPYRIGHT SPIE 2015.
Number of references:6
Main heading:Piezoelectric motors
Controlled terms:Optical testing - Piezoelectricity - Streak cameras - Wheels
Uncontrolled terms:Automatic filters - Autoregulations - Control signal - Resonance frequencies - Sinusoidal signals - Spatial discrimination - Time resolution - Working current
Classification code:601.2  Machine Components - 701.1  Electricity: Basic Concepts and Phenomena - 705.3  Electric Motors - 741.3  Optical Devices and Systems - 742.2  Photographic Equipment
DOI:10.1117/12.2199534

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 86>

Accession number:20153001051133
Title:Bit error rate analysis of X-ray communication system
Authors:Wang, L&uuml;-Qiang (1, 2); Su, Tong (1); Zhao, Bao-Sheng (1); Sheng, Li-Zhi (1); Liu, Yong-An (1); Liu, Duo (1, 2)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China
Corresponding author:Wang, L&uuml;-Qiang
Source title:Wuli Xuebao/Acta Physica Sinica
Abbreviated source title:Wuli Xuebao
Volume:64
Issue:12
Issue date:June 20, 2015
Publication year:2015
Article number:120701
Language:Chinese
ISSN:10003290
CODEN:WLHPAR
Document type:Journal article (JA)
Publisher:Institute of Physics, Chinese Academy of Sciences
Abstract:X-ray communication, which was firstly introduced by Keithe Gendreau in 2007, is potential to compete with conventional communication methods, such as microwave and laser communication, against space surroundings. As a result, a great deal of time and effort has been devoted to making the initial idea into reality in recent years. Eventually, the X-ray communication demonstration system based on the grid-controlled X-ray source and microchannel plate detector can deliver both audio and video information in a 6-meter vacuum tunnel. The point is how to evaluate this space X-ray demonstration system in a typical experimental way. The method is to design a specific board to measure the relationship between bit-error-rate and emitting power against various communicating distances. In addition, the data should be compared with the calculation and simulation results to estimate the referred theoretical model. The concept of using X-ray as signal carriers is confirmed by our first generation X-ray communication demonstration system. Specifically, the method is to use grid-controlled emission source as a transceiver while implementing the photon counting detector which can be regarded as an important orientation of future deep-space X-ray communication applications. As the key specification of any given communication system, bit-error-rate level should be informed first. In addition, the theoretical analysis by using Poisson noise model also has been implemented to support this novel communication concept. Previous experimental results indicated that the X-ray audio demonstration system requires a 10&lt;sup&gt;-4&lt;/sup&gt; bit-error-rate level with 25 kbps communication rate. The system bit-error-rate based on on-off keying (OOK) modulation is calculated and measured, which corresponds to the theoretical calculation commendably. Another point that should be taken into consideration is the emitting energy, which is the main restriction of current X-ray communication system. The designed experiment shows that the detected X-ray energy is 7 &times; 10&lt;sup&gt;-5&lt;/sup&gt; mW/m&lt;sup&gt;2&lt;/sup&gt;. This relatively low power level not only restricts the bit rate of transceiver, but also increases the error fraction to some extent. Obviously, OOK modulation can meet the high communication rate and relatively low bit-error-rate requirement of current audio demo system. Current restriction has been pointed out and the potential improvement is also presented. &copy;, 2015, Chinese Physical Society. All right reserved.
Number of references:9
Page count:5
Main heading:Bit error rate
Controlled terms:Acoustic noise - Demonstrations - Electric power transmission networks - Errors - Modulation - Optical communication - Photons - Transceivers
Uncontrolled terms:Bit error rate analysis - Communication application - Designed experiments - Microchannel plate detector - On-off keying modulations - Photon counting detectors - Poisson noise models - Theoretical calculations
Classification code:703.1  Electric Networks - 716  Telecommunication; Radar, Radio and Television - 716.3  Radio Systems and Equipment - 717  Optical Communication - 717.1  Optical Communication Systems - 718  Telephone Systems and Related Technologies; Line Communications - 723.1  Computer Programming - 731  Automatic Control Principles and Applications - 741.1  Light/Optics - 751.4  Acoustic Noise - 901.2  Education - 921  Mathematics
DOI:10.7498/aps.64.120701

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 87>

Accession number:20150800536297
Title:A 1.7-ps pulse mode-locked Yb<sup>3+</sup>:Sc<inf>2</inf>SiO<inf>5</inf> laser with a reflective graphene oxide saturable absorber
Authors:Ge, Ping-Guang (1); Su, Li-Ming (1); Liu, Jie (1); Zheng, Li-He (2); Su, Liang-Bi (2); Xu, Jun (2); Wang, Yong-Gang (3)
Author affiliation:(1) Shandong Provincial Key Laboratory of Optics and Photonic Devices, College of Physics and Electronics, Shandong Normal University, Jinan, China; (2) Key Laboratory of Transparent and Opto-functional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, China; (3) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
Corresponding author:Liu, Jie
Source title:Chinese Physics B
Abbreviated source title:Chin. Phys.
Volume:24
Issue:1
Issue date:January 1, 2015
Publication year:2015
Article number:014207
Language:English
ISSN:16741056
Document type:Journal article (JA)
Publisher:Institute of Physics Publishing
Abstract:By using a reflective graphene oxide as saturable absorber, a diode-pumped passively mode-locked Yb<sup>3+</sup>:Sc<inf>2</inf>SiO<inf>5</inf> (Yb:SSO) laser has been demonstrated for the first time. Without extra negative dispersion compensation, the minimum pulse duration of 1.7 ps with a repetition rate of 94 MHz was obtained at the central wavelength of 1062.6 nm. The average output power amounts to 355 mW under the absorbed pump power of 15 W. The maximum peak power of the mode-locking laser is up to 2.2 kW, and the single pulse energy is 3.8 nJ. &copy; 2015 Chinese Physical Society and IOP Publishing Ltd.
Number of references:33
Main heading:Laser mode locking
Controlled terms:Graphene - Locks (fasteners) - Mode-locked fiber lasers - Optical pumping - Passive mode locking - Pulse repetition rate - Pumping (laser) - Q switched lasers - Saturable absorbers - Ultrashort pulses  - Ytterbium
Uncontrolled terms:Absorbed pump power - Average output power - Central wavelength - Diode pumps - Graphene oxides - Passively mode-locked - Repetition rate - Single pulse energy
Classification code:547.2  Rare Earth Metals - 601.3  Mechanisms - 741.1  Light/Optics - 744.1  Lasers, General - 761  Nanotechnology - 804  Chemical Products Generally
DOI:10.1088/1674-1056/24/1/014207

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 88>

Accession number:20151800797189
Title:Selection of MCP for array X-ray pulsar navigation detector
Authors:Song, Juan (1, 2); Zhao, Bao-Sheng (1); Sheng, Li-Zhi (1); Liu, Zhe (1); Liu, Yong-An (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China
Corresponding author:Song, Juan
Source title:Guangxue Jingmi Gongcheng/Optics and Precision Engineering
Abbreviated source title:Guangxue Jingmi Gongcheng
Volume:23
Issue:2
Issue date:February 1, 2015
Publication year:2015
Pages:402-407
Language:Chinese
ISSN:1004924X
CODEN:GJGOF4
Document type:Journal article (JA)
Publisher:Chinese Academy of Sciences
Abstract:According to the demands of an array detector in the X-ray pulsar navigation system for Micro-channel Plate (MCP), a selection method for the MCP was explored. Four key parameters for the selection of MCPs, the uniformity of gain, impedance matching, dark count rate and the gain coefficient were determined. Based on the four key parameters, corresponding experiments were designed and the selection process of MCPs was set out. The amplitudes and counting rates of MCPs selected by proposed method were tested. The tested results show that the relative error of each detection unit is not identical. When a single channel anode is used, the ranges of the maximum relative error &Delta;&lt;inf&gt;1i&lt;/inf&gt; and minimum relative error &Delta;&lt;inf&gt;2i&lt;/inf&gt; of the amplitudes for output signals from the ith anode are 7%-13.5% and 3%-6.7%, respectively, and when a four-channel anode is used, &Delta;&lt;inf&gt;1i&lt;/inf&gt; and &Delta;&lt;inf&gt;2i&lt;/inf&gt; are 7.8% and 3.1%, respectively. Moreover, the relative error between the anode count rate n&lt;inf&gt;1&lt;/inf&gt;+n&lt;inf&gt;2&lt;/inf&gt;+n&lt;inf&gt;3&lt;/inf&gt;+n&lt;inf&gt;4&lt;/inf&gt; from the single channel and N from the four-channel shared anode is 4.38%, less than 10%. Obtained results indicate that the MCPs with good performance have been effectively chosen by the proposed selection method. &copy;, 2015, Chinese Academy of Sciences. All right reserved.
Number of references:15
Main heading:Image storage tubes
Controlled terms:Electrodes - Electromagnetic wave emission - Navigation systems - Particle beams - Pulsars
Uncontrolled terms:Count rates - MCP selection - Micro channel plate - Pulsar navigations - Pulse amplitude - Single photon detection - X-ray detector
Classification code:434.4  Waterway Navigation - 711  Electromagnetic Waves - 714.1  Electron Tubes - 932.1  High Energy Physics
DOI:10.3788/OPE.20152302.0402

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 89>

Accession number:20151000610330
Title:Machining parameter optimization of C/SiC composites using high power picosecond laser
Authors:Zhang, Ruoheng (1); Li, Weinan (1); Liu, Yongsheng (2); Wang, Chunhui (2); Wang, Jing (2); Yang, Xiaojun (1); Cheng, Laifei (2)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, Shaanxi, China; (2) Science and Technology on Thermostructure Composite Materials Laboratory, Northwestern Polytechnical University, Xi'an, Shaannxi, China
Corresponding author:Liu, Yongsheng
Source title:Applied Surface Science
Abbreviated source title:Appl Surf Sci
Volume:330
Issue date:March 1, 2015
Publication year:2015
Pages:321-331
Language:English
ISSN:01694332
CODEN:ASUSEE
Document type:Journal article (JA)
Publisher:Elsevier
Abstract:Picosecond laser is an important machining technology for high hardness materials. In this paper, high power picosecond laser was utilized to drill micro-holes in C/SiC composites, and the effects of different processing parameters including the helical line width and spacing, machining time and scanning speed were discussed. To characterize the qualities of machined holes, scanning electron microscope (SEM) was used to analyze the surface morphology, energy dispersive spectroscopy (EDS) and X-ray photoelectric spectroscopy (XPS) were employed to describe the element composition change between the untreated and laser-treated area. The experimental results indicated that all parameters mentioned above had remarkable effects on the qualities of micro-holes such as shape and depth. Additionally, the debris consisted of C, Si and O was observed on the machined surface. The SiC bonds of the SiC matrix transformed into SiO bonds after machined. Furthermore, the physical process responsible for the mechanism of debris formation was discussed as well. &copy; 2015 Elsevier B.V.
Number of references:28
Main heading:X ray photoelectron spectroscopy
Controlled terms:Ceramic matrix composites - Debris - Energy dispersive spectroscopy - Photoelectricity - Scanning electron microscopy - Silicon carbide
Uncontrolled terms:Element compositions - Energy dispersive spectroscopies (EDS) - High hardness materials - Laser process - Machining parameter optimization - Machining technology - Processing parameters - X-ray photoelectric spectroscopy
Classification code:452.3  Industrial Wastes - 741.1  Light/Optics - 801  Chemistry - 804.2  Inorganic Compounds - 812.1  Ceramics
DOI:10.1016/j.apsusc.2015.01.010

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 90>

Accession number:20143518100087
Title:Fast hyperspectral anomaly detection via high-order 2-d crossing filter
Authors:Yuan, Yuan (1); Wang, Qi (2); Zhu, Guokang (1)
Author affiliation:(1) Center for OPTical IMagery Analysis and Learning (OPTIMAL), State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics of Sciences, Xi'an 710119, China; (2) Center for OPTical IMagery Analysis and Learning (OPTIMAL), Northwestern Polytechnical University, Xi'an 710072, China
Source title:IEEE Transactions on Geoscience and Remote Sensing
Abbreviated source title:IEEE Trans Geosci Remote Sens
Volume:53
Issue:2
Issue date:February 2015
Publication year:2015
Pages:620-630
Article number:6846340
Language:English
ISSN:01962892
CODEN:IGRSD2
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:Anomaly detection has been an important topic in hyperspectral image analysis. This technique is sometimes more preferable than the supervised target detection because it requires no a priori information for the interested materials. Many efforts have been made in this topic; however, they usually suffer from excessive time cost and a high false-positive rate. There are two major problems that lead to such a predicament. First, the construction of the background model and affinity estimation are often overcomplicated. Second, most of these methods have to impose a stringent assumption on the spectrum distribution of background; however, these assumptions cannot hold for all practical situations. Based on this consideration, this paper proposes a novel method allowing for fast yet accurate pixel-level hyperspectral anomaly detection. We claim the following main contributions: 1) construct a high-order 2-D crossing approach to find the regions of rapid change in the spectrum, which runs without any a priori assumption; and 2) design a low-complexity discrimination framework for fast hyperspectral anomaly detection, which can be implemented by a series of filtering operators with linear time cost. Experiments on three different hyperspectral images containing several pixel-level anomalies demonstrate the superiority of the proposed detector compared with the benchmark methods. &copy; 2014 IEEE.
Number of references:36
Main heading:Spectroscopy
Controlled terms:Independent component analysis - Pixels - Remote sensing - Target tracking
Uncontrolled terms:Anomaly detection - Background model - high order - Hyper-spectral images - Hyperspectral anomaly detection - Hyperspectral image analysis - Priori information - Spectrum distribution
Classification code:716.2  Radar Systems and Equipment - 723.4  Artificial Intelligence - 723.5  Computer Applications - 731.1  Control Systems - 801  Chemistry
DOI:10.1109/TGRS.2014.2326654

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 91>

Accession number:20154501514863
Title:Color constancy technology based on detail description
Authors:Guo, Huinan (1); Cao, Jianzhong (1); Zhang, Hui (1); Zhou, Zuofeng (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, No.17, Xinxi Road, Gaoxin District, Xi'an, Shaanxi, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9631
Monograph title:Seventh International Conference on Digital Image Processing, ICDIP 2015
Issue date:2015
Publication year:2015
Article number:96310U
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628418293
Document type:Conference article (CA)
Conference name:7th International Conference on Digital Image Processing, ICDIP 2015
Conference date:April 9, 2015  -  April 10, 2015
Conference location:Los Angeles, CA, United states
Conference code:115652
Publisher:SPIE
Abstract:Color constancy is an important problem in machine vision and image processing fields. We propose a new method in this paper that is based on detail information description to estimate the chromaticity of the light source and restore the real color property of captured images. The main idea of the proposed approach is that according to human vision characteristics use the interest information in an image to estimate the lighting condition of real scene. To approve the proposed method, two well-known algorithms are selected and their contrast results are also presented. It is shown in this paper that the proposed approach performs better than other traditional methods for color constancy most of the time. &copy; 2015 SPIE.
Number of references:10
Main heading:Image processing
Controlled terms:Color - Color computer graphics - Computer vision - Light sources - Optical data processing
Uncontrolled terms:Color balance - Color constancy - Color properties - Color temperatures - Information descriptions - Lighting conditions - Optical imaging - Technology-based
Classification code:723.2  Data Processing and Image Processing - 723.5  Computer Applications - 741.1  Light/Optics - 741.2  Vision
DOI:10.1117/12.2197007

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 92>

Accession number:20143600016981
Title:Semi-supervised change detection method for multi-temporal hyperspectral images
Authors:Yuan, Yuan (1); Lv, Haobo (1); Lu, Xiaoqiang (1)
Author affiliation:(1) Center for OPTical IMagery Analysis and Learning (OPTIMAL), State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, Shaanxi, China
Corresponding author:Lu, Xiaoqiang
Source title:Neurocomputing
Abbreviated source title:Neurocomputing
Volume:148
Issue date:January 19, 2015
Publication year:2015
Pages:363-375
Language:English
ISSN:09252312
E-ISSN:18728286
CODEN:NRCGEO
Document type:Journal article (JA)
Publisher:Elsevier
Abstract:Change detection is one of the most important open topics for multi-temporal remote sensing technology to observe the earth. Recently, many methods are proposed to detect the land-cover change information by multi-temporal hyperspectral images. However, many existing traditional change detection methods failed to utilize the spectral information effectively. Hence the models are not robust enough for more widely applications with "noise" bands. In this case, a semi-supervised distance metric learning method is proposed to detect the change areas by abundant spectral information of hyperspectral image under the "noisy" condition. This paper focuses on semi-supervised change detection method, and proposes a new distance metric learning framework for change detection in "noisy" condition with three mainly contributions: (1) Distance metric learning is demonstrated to be an effective method for revealing the change information by high spectral features. (2) An evolution regular framework is utilized to handle change detection under a "noisy" condition without removing any noise bands, which is impacted by atmosphere (or water) and always removed manually in other literatures. (3) A semi-supervised Laplacian Regularized Metric Learning method is exploited to tackle the ill-posed sample problem, and large unlabeled data is exploited in our method. The proposed method is performed on two multi-temporal hyperspectral datasets. Experimental results show that the proposed method outperforms the state-of-the-art change detection methods under both "ideal" and "noisy" conditions. &copy; 2014 Elsevier B.V.
Number of references:44
Main heading:Signal detection
Controlled terms:Independent component analysis - Learning systems - Remote sensing - Spectroscopy
Uncontrolled terms:Change detection - Distance Metric Learning - Distance metrics - Hyper-spectral images - HyperSpectral - Multi-temporal remote sensing - Noise bands - Regularized metric learning
Classification code:716.1  Information Theory and Signal Processing - 723.4  Artificial Intelligence - 731.1  Control Systems - 801  Chemistry
DOI:10.1016/j.neucom.2014.06.024

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 93>

Accession number:20160701938434
Title:Low Repetition Rate Subnanosecond Pulse Characteristics of Nd:Lu<inf>0.5</inf>Y<inf>0.5</inf>VO<inf>4</inf>/KTP Green Laser With EO and MWCNT
Authors:Zhang, Haijuan (1); Zhao, Jia (1); Yang, Kejian (1); Zhao, Shengzhi (1); Li, Tao (1); Li, Guiqiu (1); Li, Dechun (1); Qiao, Wenchao (1); Wang, Yonggang (2); Zhao, Bin (3)
Author affiliation:(1) School of Information Science and Engineering, Shandong University, Jinan, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (3) College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou, China
Source title:IEEE Journal on Selected Topics in Quantum Electronics
Abbreviated source title:IEEE J Sel Top Quantum Electron
Volume:21
Issue:1
Issue date:January 1, 2015
Publication year:2015
Article number:6872539
Language:English
ISSN:1077260X
CODEN:IJSQEN
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:By simultaneously employing electro-optic (EO) modulator and multiwalled carbon nanotube (MWCNT) in a doubly Q-switched mode-locked (QML) Nd:Lu<inf>0.5</inf>Y<inf>0.5</inf>VO<inf>4</inf>/KTP laser, a low repetition rate subnanosecond Nd:Lu<inf>0.5</inf>Y<inf>0.5</inf>VO<inf>4</inf>/KTP green laser with high peak power is presented. Since the repetition rate of this pulsed green laser is controlled by the EO modulator, highly stable laser pulses with low repetition rates of 1-5 kHz are obtained. As the pulse duration of this laser depends on the mode-locked pulse width underneath the Q-switched envelope, subnanosecond green laser pulses with high peak power can be generated. The average output powers, pulse widths as well as peak powers versus incident pump power under different repetition rates are measured. The shortest pulse duration of 415 ps and the highest pulse energy of 424 &mu;J are obtained at the repetition rate of 1 kHz, corresponding to a peak power of as high as 1022 kW. The experimental results show that the dual-loss modulation technology with EO and MWCNT in QML laser is an efficient method in generating low repetition rate subnanosecond pulse green laser. &copy; 1995-2012 IEEE.
Number of references:37
Main heading:Pulse repetition rate
Controlled terms:Carbon - Carbon nanotubes - Laser pulses - Locks (fasteners) - Mode-locked fiber lasers - Multiwalled carbon nanotubes (MWCN) - Optical pumping - Pulsed lasers - Q switching - Yarn
Uncontrolled terms:Doubly qml lasers - Dual loss modulations - Electro-optic modulators - EO and MWCNT - Incident pump power - Low repetition rate - Q-switched envelopes - Sub-nanosecond pulse
Classification code:744.1  Lasers, General - 744.8  Laser Beam Interactions - 761  Nanotechnology - 804  Chemical Products Generally - 819.4  Fiber Products
DOI:10.1109/JSTQE.2014.2345758

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 94>

Accession number:20150900579295
Title:Online anomaly detection in crowd scenes via structure analysis
Authors:Yuan, Yuan (1); Fang, Jianwu (1, 2); Wang, Qi (3)
Author affiliation:(1) Center for Optical Imagery Analysis and Learning, State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Xi'an, Shaanxi, China; (2) University of the Chinese Academy of Science, Beijing, China; (3) Center for Optical Imagery Analysis and Learning, Northwestern Polytechnical University, Xi'an, China
Source title:IEEE Transactions on Cybernetics
Abbreviated source title:IEEE Trans. Cybern.
Volume:45
Issue:3
Issue date:March 1, 2015
Publication year:2015
Pages:562-575
Article number:06844850
Language:English
ISSN:21682267
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:Abnormal behavior detection in crowd scenes is continuously a challenge in the field of computer vision. For tackling this problem, this paper starts from a novel structure modeling of crowd behavior. We first propose an informative structural context descriptor (SCD) for describing the crowd individual, which originally introduces the potential energy function of particle's interforce in solid-state physics to intuitively conduct vision contextual cueing. For computing the crowd SCD variation effectively, we then design a robust multi-object tracker to associate the targets in different frames, which employs the incremental analytical ability of the 3-D discrete cosine transform (DCT). By online spatial-temporal analyzing the SCD variation of the crowd, the abnormality is finally localized. Our contribution mainly lies on three aspects: 1) the new exploration of abnormal detection from structure modeling where the motion difference between individuals is computed by a novel selective histogram of optical flow that makes the proposed method can deal with more kinds of anomalies; 2) the SCD description that can effectively represent the relationship among the individuals; and 3) the 3-D DCT multi-object tracker that can robustly associate the limited number of (instead of all) targets which makes the tracking analysis in high density crowd situation feasible. Experimental results on several publicly available crowd video datasets verify the effectiveness of the proposed method. &copy; 2014 IEEE.
Number of references:58
Main heading:Behavioral research
Controlled terms:Artificial intelligence - Computer vision - Discrete cosine transforms - Image processing - Learning systems - Motion analysis - Object detection - Potential energy - Potential energy functions - Social networking (online)
Uncontrolled terms:Abnormal behavior detections - Anomaly detection - Discrete Cosine Transform(DCT) - Object Tracking - Online anomaly detection - Structure analysis - Structure modeling - Video analysis
Classification code:723  Computer Software, Data Handling and Applications - 741  Light, Optics and Optical Devices - 741.2  Vision - 921.3  Mathematical Transformations - 931.1  Mechanics - 971  Social Sciences
DOI:10.1109/TCYB.2014.2330853

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 95>

Accession number:20155201715854
Title:All-optical signal processing technique for secure optical communication
Authors:Qian, Feng-Chen (1, 2, 3); Su, Bing (1); Ye, Ya-Lin (1); Zhang, Qian (1); Lin, Shao-Feng (1); Duan, Tao (2); Duan, Jie (1)
Author affiliation:(1) Xi'an Communication Institute, Xi'an, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (3) Graduate University, Chinese Academy of Sciences, Beijing, China
Corresponding author:Qian, Feng-Chen
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9679
Monograph title:AOPC 2015: Optical Fiber Sensors and Applications
Issue date:2015
Publication year:2015
Article number:96790P
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628419047
Document type:Conference article (CA)
Conference name:Applied Optics and Photonics, China: Optical Fiber Sensors and Applications, AOPC 2015
Conference date:May 5, 2015  -  May 7, 2015
Conference location:Beijing, China
Conference code:117016
Sponsor:Chinese Society for Optical Engineering
Publisher:SPIE
Abstract:Secure optical communication technologies are important means to solve the physical layer security for optical network. We present a scheme of secure optical communication system by all-optical signal processing technique. The scheme consists of three parts, as all-optical signal processing unit, optical key sequence generator, and synchronous control unit. In the paper, all-optical signal processing method is key technology using all-optical exclusive disjunction (XOR) gate based on optical cross-gain modulation effect, has advantages of wide dynamic range of input optical signal, simple structure and so on. All-optical XOR gate composed of two semiconductor optical amplifiers (SOA) is a symmetrical structure. By controlling injection current, input signal power, delay and filter bandwidth, the extinction ratio of XOR can be greater than 8dB. Finally, some performance parameters are calculated and the results are analyzed. The simulation and experimental results show that the proposed method can be achieved over 10Gbps optical signal encryption and decryption, which is simple, easy to implement, and error-free diffusion. &copy; 2015 SPIE.
Number of references:15
Main heading:Optical communication
Controlled terms:Cryptography - Fiber optic sensors - Light amplifiers - Logic gates - Modulation - Network layers - Optical fiber communication - Optical fibers - Optical signal processing - Processing  - Semiconductor junctions - Semiconductor optical amplifiers - Signal processing
Uncontrolled terms:All-optical signal processing - All-optical XOR gate - Optical cross-gain modulation - Performance parameters - Physical layer security - Secure optical communication - Symmetrical structure - Synchronous control
Classification code:714.2  Semiconductor Devices and Integrated Circuits - 716.1  Information Theory and Signal Processing - 717.1  Optical Communication Systems - 721.2  Logic Elements - 723  Computer Software, Data Handling and Applications - 741.1.2  Fiber Optics - 913.4  Manufacturing
DOI:10.1117/12.2199635

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 96>

Accession number:20154701593574
Title:Ultrafast pump-probe detection of X-ray induced transient optical reflectivity changes in GaAs
Authors:Wang, Bo (1, 2, 3); Bai, Yonglin (1, 2); Xu, Peng (2); Gou, Yongsheng (2, 3); Zhu, Bingli (2); Bai, Xiaohong (1); Liu, Baiyu (2); Qin, Junjun (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) Key Laboratory of Ultra-fast Photoelectric Diagnostics Technology, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (3) University of Chinese Academy of Sciences, Beijing, China
Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering
Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.
Volume:44
Issue:10
Issue date:October 25, 2015
Publication year:2015
Pages:3130-3133
Language:English
ISSN:10072276
Document type:Journal article (JA)
Publisher:Chinese Society of Astronautics
Abstract:The optical index modulation was theoretically estimated and demonstrated under short X-ray excitation in low-temperature-grown GaAs (LT_GaAs). Hot-electron thermalization time &lt;1 ps, carrier recombination time &lt;2 ps and the duration of the index perturbation was determined by the carrier recombination time which was of orde r-2 ps in LT_GaAs with a high density of recombination defects. Predictions of radiation-induced changed in the optical refractive index were in reasonably good agreement with the limited experimental data available, suggesting that LT_GaAs was a highly promising material for high speed single transient ionizing radiation detector. &copy;, 2015, Editorial Board of Journal of Infrared and Laser Engineering. All right reserved.
Number of references:12
Main heading:Gallium arsenide
Controlled terms:Ionizing radiation - Refractive index - Semiconducting gallium - Temperature
Uncontrolled terms:Carrier recombination time - Electron thermalization - Index perturbation - Low-temperature-grown GaAs - Optical reflectivity - Recombination defects - Temporal resolution - X-ray detector
Classification code:641.1  Thermodynamics - 712.1.1  Single Element Semiconducting Materials - 741.1  Light/Optics - 804  Chemical Products Generally

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 97>

Accession number:20160501858776
Title:Calibration and compensation of angular error in laser tracker
Authors:She, Wenji (1, 2); Gao, Limin (1); Yang, Yongqing (1); Zhou, Liang (2)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China
Source title:Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument
Abbreviated source title:Yi Qi Yi Biao Xue Bao
Volume:36
Issue date:December 1, 2015
Publication year:2015
Pages:52-56
Language:Chinese
ISSN:02543087
CODEN:YYXUDY
Document type:Journal article (JA)
Publisher:Science Press
Abstract:Following polar cordinate mesuring method with single apparatus, and combining precise laser ranging technology and high-accuracy angular measure technology, Laser tracker have excellent ability in large-scale metrology. Angular mesure system adopt with rotory grating, which is a non-contacat digital measure system integral with optical, mechanical and electronic technology. Accompanied with simple structure, high precision and fast measure speed, rotory grating have widespread used in epuipment of precision angular measurement. According to analysis all type error of rotary grating such as dividing error in manufacture, subdivision error in electroncis, wobbling of shaft and eccentricity of grating in mounting, a error compensation model were established through Fourier analysis method, adopted this compensation, the angular error reduced form 10 arc-second to 0.8 arc-second measured by one grating readhead, this measuring accuracy correspondent to diametrical measurement by two grating readhead, which characteristic ultra-high accuracy of 0.3 arc-second. &copy; 2015, Editorial Office of Chinese Journal of Scientific Instrument. All right reserved.
Number of references:12
Main heading:Error compensation
Controlled terms:Angle measurement - Errors - Fourier analysis
Uncontrolled terms:Angular accuracy - Electronic technologies - Fourier analysis methods - Large scale metrology - Laser tracker - Rotary grating - Subdivision errors - Ultra-high accuracy
Classification code:921  Mathematics - 943.2  Mechanical Variables Measurements

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 98>

Accession number:20153501209554
Title:Calibration method for large aperture static imaging spectrometer's detector registration error
Authors:Zhang, Zhoufeng (1, 2, 3); Xie, Yongjun (1); Hu, Bingliang (1); Yin, Qinye (2); Yu, Tao (1, 3)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an, China; (3) University of Chinese Academy of Sciences, Beijing, China
Corresponding author:Yu, Tao
Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering
Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.
Volume:44
Issue:5
Issue date:May 25, 2015
Publication year:2015
Pages:1643-1646
Language:Chinese
ISSN:10072276
Document type:Journal article (JA)
Publisher:Chinese Society of Astronautics
Abstract:As a novel type Fourier transform imaging spectrometry, large aperture static imaging spectrometry has come forth in recent years, which has many advantages such as high throughput, multichanneland so on. However, if there are certain registration error on the detector array and interferogram, it will have a greater impact on the restoring spectrum, and even affect the final application of the instrument. To solve this problem, according to the imaging prinple analysis of LASIS, a detector registration error calibration method was given, after verification, this method can well solve the problem of the detector registration error, and the accuracy of recovered spectrum was evidently improved. This study has important guiding significance for the development of large aperture static imaging spectrometer. &copy;, 2015, Chinese Society of Astronautics. All right reserved.
Number of references:10
Main heading:Least squares approximations
Controlled terms:Calibration - Errors - Spectrometers - Spectrometry
Uncontrolled terms:Calibration method - Detector arrays - Fourier-transform imaging - Guiding significances - Imaging spectrometers - Large aperture - Least square methods - Registration error
Classification code:731  Automatic Control Principles and Applications - 801  Chemistry - 921  Mathematics - 921.6  Numerical Methods - 941  Acoustical and Optical Measuring Instruments - 942  Electric and Electronic Measuring Instruments - 943  Mechanical and Miscellaneous Measuring Instruments - 944  Moisture, Pressure and Temperature, and Radiation Measuring Instruments

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 99>

Accession number:20151800813118
Title:Magneto-optical modulation measurement method of glass internal stress
Authors:Li, Chunyan (1, 2); Wu, Yiming (1); Gao, Limin (1); Lu, Weiguo (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China
Corresponding author:Li, Chunyan
Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering
Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.
Volume:44
Issue:3
Issue date:March 25, 2015
Publication year:2015
Pages:911-916
Language:English
ISSN:10072276
Document type:Journal article (JA)
Publisher:Chinese Society of Astronautics
Abstract:In order to achieve the high-precision measurement of glass internal stress, a new method of magneto-optical modulation was proposed, and the system of internal stress measurement based on the magneto-optical modulation was established. First, measurement model of the system was derived according to the Mueller matrix description method of polarized light, by using separation of the direct current, fundamental frequency and the second harmonic component of detected signals, and "normalized" approach, the impact of the light source intensity fluctuation on the measurement result was eliminated. The direction of glass internal stress and the size of stress birefringence values were received by processing the respective signal components. By measuring the glass at different positions, the validity of the method is verified, and the measurement accuracy of internal stress direction is 5&Prime;, the measurement accuracy of stress birefringence value is below 0.5 nm/cm. This system has high stability and high accuracy. &copy;, 2015, Chinese Society of Astronautics. All right reserved.
Number of references:10
Main heading:Stress measurement
Controlled terms:Birefringence - Light modulation - Light polarization - Light sources - Matrix algebra - Modulation - Optical glass - Source separation
Uncontrolled terms:Fundamental frequencies - High-precision measurement - Light source intensity - Magneto-optical - Measurement accuracy - Measurement methods - Second harmonic component - Stress birefringence
Classification code:421  Strength of Building Materials; Mechanical Properties - 422  Strength of Building Materials; Test Equipment and Methods - 716  Telecommunication; Radar, Radio and Television - 716.1  Information Theory and Signal Processing - 717  Optical Communication - 718  Telephone Systems and Related Technologies; Line Communications - 741.1  Light/Optics - 741.3  Optical Devices and Systems - 921.1  Algebra

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 100>

Accession number:20151400711780
Title:Learning a tracking and estimation integrated graphical model for human pose tracking
Authors:Zhao, Lin (1); Gao, Xinbo (1); Tao, Dacheng (2); Li, Xuelong (3)
Author affiliation:(1) Video and Image Processing System (VIPS) Laboratory, School of Electronic Engineering, Xidian University, Xi'an, China; (2) Centre for Quantum Computation and Intelligent Systems, Faculty of Engineering and Information Technology, University of Technology, Sydney, 81 Broadway Street, Ultimo; NSW, Australia; (3) Center for OPTical IMagery Analysis and Learning (OPTIMAL), State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, Shaanxi, China
Source title:IEEE Transactions on Neural Networks and Learning Systems
Abbreviated source title:IEEE Trans. Neural Networks Learn. Sys.
Volume:26
Issue:12
Issue date:December 1, 2015
Publication year:2015
Pages:3176-3186
Article number:7070741
Language:English
ISSN:2162237X
E-ISSN:21622388
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:We investigate the tracking of 2-D human poses in a video stream to determine the spatial configuration of body parts in each frame, but this is not a trivial task because people may wear different kinds of clothing and may move very quickly and unpredictably. The technology of pose estimation is typically applied, but it ignores the temporal context and cannot provide smooth, reliable tracking results. Therefore, we develop a tracking and estimation integrated model (TEIM) to fully exploit temporal information by integrating pose estimation with visual tracking. However, joint parsing of multiple articulated parts over time is difficult, because a full model with edges capturing all pairwise relationships within and between frames is loopy and intractable. In previous models, approximate inference was usually resorted to, but it cannot promise good results and the computational cost is large. We overcome these problems by exploring the idea of divide and conquer, which decomposes the full model into two much simpler tractable submodels. In addition, a novel two-step iteration strategy is proposed to efficiently conquer the joint parsing problem. Algorithmically, we design TEIM very carefully so that: 1) it enables pose estimation and visual tracking to compensate for each other to achieve desirable tracking results; 2) it is able to deal with the problem of tracking loss; and 3) it only needs past information and is capable of tracking online. Experiments are conducted on two public data sets in the wild with ground truth layout annotations, and the experimental results indicate the effectiveness of the proposed TEIM framework. &copy; 2015 IEEE.
Number of references:56
Main heading:Gesture recognition
Controlled terms:Iterative methods - Motion estimation - Target tracking - Tracking (position) - Video streaming
Uncontrolled terms:Approximate inference - Computational costs - Divide and conquer - Human pose tracking - Integrated modeling - Parsing problems - Spatial configuration - Temporal information
DOI:10.1109/TNNLS.2015.2411287

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 101>

Accession number:20153201156264
Title:Autofocusing and resolution enhancement in digital holographic microscopy by using speckle-illumination
Authors:Zheng, Juanjuan (2); Pedrini, Giancarlo (1); Gao, Peng (1, 2); Yao, Baoli (2); Osten, Wolfgang (1)
Author affiliation:(1) Institut f&uuml;r Technische Optik, Universit&auml;t Stuttgart, Pfaffenwaldring 9, Stuttgart, Germany; (2) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
Source title:Journal of Optics (United Kingdom)
Abbreviated source title:J. Opt.
Volume:17
Issue:8
Issue date:August 1, 2015
Publication year:2015
Article number:085301
Language:English
ISSN:20408978
E-ISSN:20408986
Document type:Journal article (JA)
Publisher:Institute of Physics Publishing
Abstract:Sequential speckle illumination has been incorporated into digital holographic microscopy (DHM) for autofocusing and resolution enhancement. For autofocusing, the image plane is numerically determined by searching for the minimal deviation among the reconstructed images obtained by different speckle illuminations and propagating the object wave to the image plane accordingly. Furthermore, an iterative method is used to synthesize the numerical aperture from the reconstructed object waves obtained by different speckle illuminations, in order to achieve resolution enhancement. The feasibility of the proposed method is demonstrated by both simulation and experiment. &copy; 2015 IOP Publishing Ltd.
Number of references:34
Main heading:Speckle
Controlled terms:Holography - Iterative methods - Microscopic examination - Numerical methods - Phase measurement
Uncontrolled terms:Auto-focusing - Digital holographic microscopy - Numerical aperture - Object waves - Phase imaging - Reconstructed image - Reconstructed objects - Resolution enhancement
Classification code:741.1  Light/Optics - 743  Holography - 746  Imaging Techniques - 921.6  Numerical Methods - 942.2  Electric Variables Measurements
DOI:10.1088/2040-8978/17/8/085301

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 102>

Accession number:20155201717481
Title:Thermal/structural/optical integrated design for optical window of a high-speed aerial optical camera
Authors:Zhang, Gaopeng (1); Yang, Hongtao (1, 2); Mei, Chao (1); Shi, Kui (1); Wu, Dengshan (1); Qiao, Mingrui (1, 2)
Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics of CAS, Xi'an, China; (2) Graduate School of Chinese Academy of Sciences, Beijing, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9676
Monograph title:AOPC 2015: Optical Design and Manufacturing Technologies
Issue date:2015
Publication year:2015
Article number:96760W
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628419016
Document type:Conference article (CA)
Conference name:Applied Optics and Photonics, China: Optical Design and Manufacturing Technologies, AOPC 2015
Conference date:May 5, 2015  -  May 7, 2015
Conference location:Beijing, China
Conference code:117014
Sponsor:Chinese Society for Optical Engineering
Publisher:SPIE
Abstract:In order to obtain high quality image of the aero optical remote sensor, it is important to analysis its thermal-optical performance on the condition of high speed and high altitude. Especially for the key imaging assembly, such as optical window, the temperature variation and temperature gradient can result in defocus and aberrations in optical system, which will lead to the poor quality image. In order to improve the optical performance of a high speed aerial camera optical window, the thermal/structural/optical integrated design method is developed. Firstly, the flight environment of optical window is analyzed. Based on the theory of aerodynamics and heat transfer, the convection heat transfer coefficient is calculated. The temperature distributing of optical window is simulated by the finite element analysis software. The maximum difference in temperature of the inside and outside of optical window is obtained. Then the deformation of optical window under the boundary condition of the maximum difference in temperature is calculated. The optical window surface deformation is fitted in Zernike polynomial as the interface, the calculated Zernike fitting coefficients is brought in and analyzed by CodeV Optical Software. At last, the transfer function diagrams of the optical system on temperature field are comparatively analyzed. By comparing and analyzing the result, it can be obtained that the optical path difference caused by thermal deformation of the optical window is 149.6 nm, which is under PV &le;1 4&lambda;.The simulation result meets the requirements of optical design very well. The above study can be used as an important reference for other optical window designs. &copy; 2015 SPIE.
Number of references:10
Main heading:Finite element method
Controlled terms:Aerodynamic heating - Aerodynamics - Cameras - Deformation - Design - Heat convection - Heat transfer - Manufacture - Optical design - Optical systems  - Quality control - Temperature
Uncontrolled terms:Finite element analysis software - Optical path difference - Optical remote sensors - Optical window - Optical window design - Temperature distributing - Temperature variation - Thermal/structural/optical integrated
Classification code:641.1  Thermodynamics - 641.2  Heat Transfer - 651.1  Aerodynamics, General - 741.1  Light/Optics - 741.3  Optical Devices and Systems - 742.2  Photographic Equipment - 913.3  Quality Assurance and Control - 913.4  Manufacturing - 921.6  Numerical Methods
DOI:10.1117/12.2199812

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 103>

Accession number:20151100635608
Title:Performances of a solid streak camera based on conventional CCD with nanosecond time resolution
Authors:Wang, Bo (1); Bai, Yonglin (1); Zhu, Bingli (1); Gou, Yongsheng (1); Xu, Peng (2); Bai, Xiaohong (3); Liu, Baiyu (1); Qin, Junjun (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) Key Laboratory of Ultra-fast Photoelectric Diagnostics Technology, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (3) Graduate School of the Chinese Academy of Sciences, Beijing, China
Corresponding author:Wang, Bo
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9449
Volume title:International Conference on Photonics and Optical Engineering, icPOE 2014
Part number:1 of 1
Issue date:2015
Publication year:2015
Article number:94493H
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628415650
Document type:Conference article (CA)
Conference name:International Conference on Photonics and Optical Engineering, icPOE 2014
Conference date:October 13, 2014  -  October 15, 2014
Conference location:Xi'an, China
Conference code:111356
Sponsor:Optics and Photonics Society of Singapore; Shaanxi Optical Society; Shaanxi Provincial Physical Society
Publisher:SPIE
Abstract:Imaging systems with high temporal resolution are needed to study rapid physical phenomena ranging from shock waves, including extracorporeal shock waves used for surgery, to diagnostics of laser fusion and fuel injection in internal combustion engines. However, conventional streak cameras use a vacuum tube making thus fragile, cumbersome and expensive. Here we report an CMOS streak camera project consists in reproducing completely this streak camera functionality with a single CMOS chip. By changing the mode of charge transfer of CMOS image sensor, fast photoelectric diagnostics of single point with linear CMOS and high-speed line scanning with array CMOS sensor can be achieved respectively. A fast photoelectric diagnostics system has been designed and fabricated to investigate the feasibility of this method. Finally, the dynamic operation of the sensors is exposed. Measurements show a sample time of 500 ps and a time resolution better than 2 ns.. &copy; 2015 SPIE.
Number of references:8
Main heading:Streak cameras
Controlled terms:Charge transfer - CMOS integrated circuits - Digital cameras - Electron tubes - Image resolution - Image sensors - Internal combustion engines - Laser diagnostics - Laser surgery - Photoelectricity  - Photonics - Shock waves
Uncontrolled terms:CMOS image sensor - CMOS sensors - Dynamic operations - High speed lines - High temporal resolution - Physical phenomena - Single point - Time resolution
Classification code:612.1  Internal Combustion Engines, General - 714.1  Electron Tubes - 714.2  Semiconductor Devices and Integrated Circuits - 741  Light, Optics and Optical Devices - 742  Cameras and Photography - 742.2  Photographic Equipment - 744.9  Laser Applications - 802.2  Chemical Reactions - 931  Classical Physics; Quantum Theory; Relativity
DOI:10.1117/12.2085044

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 104>

Accession number:20155201729066
Title:ASO-S: Advanced Space-based Solar Observatory
Authors:Gan, Weiqun (1); Deng, Yuanyong (2); Li, Hui (1); Wu, Jian (1); Zhang, Haiying (3); Chang, Jin (1); Chen, Changya (4); Zhang, Zhiqiang (5); Chen, Bo (6); Feng, Li (1); Guo, Jianhua (1); Hu, Yiming (1); Huang, Yu (1); Li, Zhaohui (6); Peng, Yuming (4); Wang, Dongguang (2); Wang, Hong (7); Wang, Jianing (3); Wen, Desheng (7); Wu, Zhen (3); Zhang, Zhe (1); Zhao, Erxin (5)
Author affiliation:(1) Purple Mountain Observatory, Chinese Academy of Sciences, 2 West Beijing Road, Nanjing, China; (2) National Astronomical Observatories, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing, China; (3) Nanjing Institute of Astronomical Optics and Technology, National Astronomical Observatories, Chinese Academy of Sciences, 188 Bancang Street, Nanjing, China; (4) Shanghai Institute of Satellite Engineering (SISE), 251 Huaning Road, Minghang district, Shanghai, China; (5) Beijing Institute of Spacecraft System Engineering, Beijing, China; (6) Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, 3888 Dong Nanhu Road, Changchun, China; (7) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, 17 Xinxi Road, Xi'an Hi-Tech Industrial Development Zone, Xi'an, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9604
Monograph title:Solar Physics and Space Weather Instrumentation VI
Issue date:2015
Publication year:2015
Article number:96040T
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628417708
Document type:Conference article (CA)
Conference name:Solar Physics and Space Weather Instrumentation VI
Conference date:August 9, 2015  -  August 10, 2015
Conference location:San Diego, CA, United states
Conference code:117344
Sponsor:The Society of Photo-Optical Instrumentation Engineers (SPIE)
Publisher:SPIE
Abstract:ASO-S is a mission proposed for the 25th solar maximum by the Chinese solar community. The scientific objectives are to study the relationships among solar magnetic field, solar flares, and coronal mass ejections (CMEs). ASO-S consists of three payloads: Full-disk Magnetograph (FMG), Lyman-alpha Solar Telescope (LST), and Hard X-ray Imager (HXI), to measure solar magnetic field, to observe CMEs and solar flares, respectively. ASO-S is now under the phase-B studies. This paper makes a brief introduction to the mission. &copy; 2015 SPIE.
Number of references:17
Main heading:Magnetism
Controlled terms:Magnetic fields - Magnetometers
Uncontrolled terms:Coronal mass ejection - Hard X-ray Imager - Scientific objectives - Solar flare - Solar magnetic fields - Solar maxima - Solar spaces - Solar telescope
Classification code:701.2  Magnetism: Basic Concepts and Phenomena - 942.3  Magnetic Instruments
DOI:10.1117/12.2189062

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 105>

Accession number:20161602271470
Title:Annular force based variable curvature mirror aiming to realize non-moving element optical zooming
Authors:Zhao, Hui (1); Xie, Xiaopeng (1, 2); Wei, Jingxuan (3); Ren, Guorui (1); Pang, Zhihai (1); Xu, Liang (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, No. 17 Xinxi Road, Xi'an, China; (2) School of Physical Science and Technology, Inner Mongolia University, No.235 West College Road, Hohhot Inner-Mongolia, China; (3) School of Computer Science and Technology, Xidian University, No.2, South Taibai Road, Xi'an, China
Corresponding author:Zhao, Hui(zhaohui@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9678
Monograph title:AOPC 2015: Telescope and Space Optical Instrumentation
Issue date:2015
Publication year:2015
Article number:967807
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628419030
Document type:Conference article (CA)
Conference name:Applied Optics and Photonics, China: Telescope and Space Optical Instrumentation, AOPC 2015
Conference date:May 5, 2015  -  May 7, 2015
Conference location:Beijing, China
Conference code:117482
Sponsor:Chinese Society for Optical Engineering
Publisher:SPIE
Abstract:Recently, a new kind of optical zooming technique in which no moving elements are involved has been paid much attention. The elimination of moving elements makes optical zooming suitable for applications which has exacting requirements in space, power cost and system stability. The mobile phone and the space-borne camera are two typical examples. The key to realize non-moving elements optical zooming lies in the introduction of variable curvature mirror (VCM) whose radius of curvature could be changed dynamically. When VCM is about to be used to implement optical zoom imaging, two characteristics should be ensured. First, VCM has to provide large enough saggitus variation in order to obtain a big magnification ratio. Second, after the radius of curvature has been changed, the corresponding surface figure accuracy should still be maintained superior to a threshold level to make the high quality imaging possible. In this manuscript, based on the elasticity theory, the physical model of the annular force based variable curvature mirror is established and numerically analyzed. The results demonstrate that when the annular force is applied at the half-the-aperture position, the actuation force is reduced and a smaller actuation force is required to generate the saggitus variation and thus the maintenance of surface figure accuracy becomes easier during the variation of radius of curvature. Besides that, a prototype VCM, whose diameter and thickness are 100mm and 3mm respectively, have been fabricated and the maximum saggitus variation that could be obtained approaches more than 30 wavelengths. At the same time, the degradation of surface figure accuracy is weakly correlated to the curvature radius variation. &copy; 2015 SPIE.
Number of references:16
Main heading:Mirrors
Controlled terms:Boundary integral equations - System stability - Telescopes
Uncontrolled terms:Elasticity theory - High-quality imaging - Optical zooming - Radius of curvature - Saggitus - Surface figure accuracies - Threshold levels - Variable curvature mirror
Classification code:741.3  Optical Devices and Systems - 921.2  Calculus - 961  Systems Science
DOI:10.1117/12.2197408

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 106>

Accession number:20152400928307
Title:Study on writing double line waveguide in Yb&lt;sup&gt;3+&lt;/sup&gt;: phosphate glass by femtosecond laser
Authors:Tang, Wenlong (1, 2); Liu, Shuang (1, 2); Cheng, Guanghua (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; Shaanxi, China; (2) University of Chinese Academy of Sciences, Beijing, China
Corresponding author:Cheng, Guanghua
Source title:Zhongguo Jiguang/Chinese Journal of Lasers
Abbreviated source title:Zhongguo Jiguang
Volume:42
Issue:4
Issue date:April 10, 2015
Publication year:2015
Article number:0406005
Language:Chinese
ISSN:02587025
CODEN:ZHJIDO
Document type:Journal article (JA)
Publisher:Science Press
Abstract:By using femtosecond laser with repetition frequency of 50 kHz, center wavelength of 790 nm, and pulse width of 140 fs, double line waveguides are inscribed in Yb&lt;sup&gt;3+&lt;/sup&gt; doped phosphate glass. The influences of double-line separation, laser pulse energy and writing speed on the waveguide formation are investigated and the near-field modes of waveguides written by different laser parameters are measured. The experimental results show that the waveguide has good property of guiding under the writing conditions of double-line separation of 35 mm, pulse energy of 1.0 mJ and scanning speed of 600 mm/s. By using near-field mode, bivariate distribution of the waveguide refractive index is reconstructed with the maximum refractive index change of 1.5&times;10&lt;sup&gt;-4&lt;/sup&gt;. The propagation loss of the waveguide is 1.56 dB/cm by testing with the scattering technique. The phenomenon of polarization guiding is discovered from the waveguide. The waveguide can guide the laser with polarization parallel to the direction of double line and the laser with polarization perpendicular to the direction of double line cannot be guided. &copy;, 2015, Science Press. All right reserved.
Number of references:25
Page count:7
Main heading:Waveguides
Controlled terms:Glass - Integrated optics - Optical waveguides - Polarization - Refractive index - Ultrashort pulses - Ytterbium
Uncontrolled terms:Bivariate distribution - Center wavelength - Laser-pulse energy - Phosphate glass - Refractive index changes - Repetition frequency - Scattering techniques - Waveguide formation
Classification code:547.2  Rare Earth Metals - 714.3  Waveguides - 741.1  Light/Optics - 741.3  Optical Devices and Systems - 744.1  Lasers, General - 812.3  Glass
DOI:10.3788/CJL201542.0406005

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 107>

Accession number:20155201717500
Title:Optical system design for lens with large relative aperture
Authors:Zhang, Kaisheng (1); Zhang, Zhi (1); Zhang, Zhaohui (1); Wang, Zefeng (1); Yan, Aqi (1); Fei, Jiaqi (1); Mei, Chao (1); Zhang, Gaopeng (1)
Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9676
Monograph title:AOPC 2015: Optical Design and Manufacturing Technologies
Issue date:2015
Publication year:2015
Article number:967615
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628419016
Document type:Conference article (CA)
Conference name:Applied Optics and Photonics, China: Optical Design and Manufacturing Technologies, AOPC 2015
Conference date:May 5, 2015  -  May 7, 2015
Conference location:Beijing, China
Conference code:117014
Sponsor:Chinese Society for Optical Engineering
Publisher:SPIE
Abstract:As the space remote sensing technology progresses, the developing trend of telescope is larger and larger aperture, higher and higher resolution. An Optical system with the relative aperture of 1:2 is introduced. The primary optical properties are: focal length of 120mm, F number of 2, field angle of 7.4&deg;. It has the advantages of large high resolution, small size and excellent image quality. Several kinds of aberration curves and the MTF curve are given. Its imaging quality is nearly diffraction limited so that the spatial frequency is greater than 70lp/mm when its modulated transfer function (MTF) value of the optical system is equal to 0.8,and the optical system distortion is less than 1%. At last, the stray light is analyzed and the baffle of the telescope is designed. The solid model of the Optical system was constructed in Tracepro software, the point sources transmittance (PST) cure was given at different off-axis angle between 7.4&deg;&sim;80&deg;&iuml;1/4&OElig;the analysis result indicates that the PST values are less than 10-6 when off-axis angle are larger than soar critical angle. So the system is suitable for observation or photography of deep sky objects. &copy; 2015 SPIE.
Number of references:10
Main heading:Optical systems
Controlled terms:Curing - Design - Image quality - Lenses - Light - Manufacture - Optical design - Optical properties - Optical transfer function - Remote sensing  - Stray light - Telescopes - Transfer functions
Uncontrolled terms:Diffraction limited - High resolution - Higher resolution - Modulated transfer functions - Point sources - relative aperture - Space remote sensing technology - Spatial frequency
Classification code:537.1  Heat Treatment Processes - 741.1  Light/Optics - 741.3  Optical Devices and Systems - 802.2  Chemical Reactions - 921  Mathematics
DOI:10.1117/12.2203099

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 108>

Accession number:20152100877439
Title:Detector noise quantitative ratio modelling in coherent field imaging
Authors:Cheng, Zhi-Yuan (1, 2); Luo, Xiu-Juan (1); Ma, Cai-Wen (1); Zhang, Yu (1, 2); Liu, Hui (1); Zhu, Xiang-Ping (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China
Corresponding author:Luo, Xiu-Juan
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:44
Issue:4
Issue date:April 1, 2015
Publication year:2015
Article number:0407002
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:In order to settle the problem of quantitativly estimating ratio of detector noise and analyse whether detecoror noise is the main noise in laser coherent field imaging system, a novel method of quantitative analysis detector noise ratio was proposed. The Signalt-to-Noise (SNR) of the system was given by photoelectron statistics method, and estimating equation of SNR intermediate parameter was derived. A quantitative ratio model of detector noise to total noise was established by SNR equation and estimating equation of SNR intermediate parameter. The ratio model was tested and verified by theory analysis and experiment. The results show that in the specific experiment table, detector noise is about 52% of the total noise. Because the experiment was accomplished at night, turbulence noise and background noise had the least influence on the system, detector noise was the main noise source. The conclusion was acquired that the proposed metod can accurately and effectively estimate detector noise ratio to total noise and has the advantage of simplicity and effectiveness. It can be widely applied in quantitative analysing and measuring of detector noise in laser coherent imaging system. &copy;, 2015, Chinese Optical Society. All right reserved.
Number of references:15
Page count:5
Main heading:Signal to noise ratio
Controlled terms:Detectors - Imaging systems - Laser beams - Parameter estimation
Uncontrolled terms:Analytical studies - Background noise - Coherent imaging systems - Estimating equations - Experiment table - Noise analysis - SNR - Statistics method
Classification code:716.1  Information Theory and Signal Processing - 731.1  Control Systems - 741  Light, Optics and Optical Devices - 744.8  Laser Beam Interactions - 746  Imaging Techniques - 914  Safety Engineering
DOI:10.3788/gzxb20154404.0407002

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 109>

Accession number:20151800813119
Title:Stray light suppression of different ground-based photoelectric detection systems
Authors:Yan, Peipei (1); Li, Gang (1); Liu, Kai (1); Jiang, Kai (1); Duan, Jing (1); Shan, Qiusha (1)
Author affiliation:(1) The Photoelectric Measurement and Control Technology Research Department, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
Corresponding author:Yan, Peipei
Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering
Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.
Volume:44
Issue:3
Issue date:March 25, 2015
Publication year:2015
Pages:917-922
Language:Chinese
ISSN:10072276
Document type:Journal article (JA)
Publisher:Chinese Society of Astronautics
Abstract:The stray light characteristics of different catadioptric ground-based photoelectric detection system were analyzed. The relevant stray light suppression ways were discussed. Based on structure with middle image surface and the other one without middle image surface, two different suppression schemes for the stray light were provided respectively. Besides, the thermal radiation for the long wave infrared system was analyzed. The results show that adding out baffle to the catadioptric system without middle image surface can do well obviously in reducing stray light with large off-axis angles. However, adding stops and the inner baffle of primary mirror to the catadioptric system with middle image surface can reduce the outer stray light obviously. This can reduce the length and weight greatly. If the thermal radiation demand can be satisfied, the miniaturization and lightweight design had been realized. &copy;, 2015, Chinese Society of Astronautics. All right reserved.
Number of references:10
Main heading:Stray light
Controlled terms:Heat radiation - Imaging systems - Infrared devices - Infrared radiation - Photoelectricity - Telescopes
Uncontrolled terms:Catadioptric system - Lightweight design - Long wave infrared - Off-axis angles - Photoelectric detection - Photoelectric detection systems - Primary mirrors - Stray light suppression
Classification code:641.2  Heat Transfer - 741  Light, Optics and Optical Devices - 746  Imaging Techniques

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 110>

Accession number:20152801019519
Title:Three types of pulses delivered from a nanotube-mode-locked fiber laser
Authors:Yao, X.K. (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
Corresponding author:Yao, X.K.
Source title:Laser Physics
Abbreviated source title:Laser Phys.
Volume:25
Issue:7
Issue date:July 1, 2015
Publication year:2015
Article number:075101
Language:English
ISSN:1054660X
E-ISSN:15556611
Document type:Journal article (JA)
Publisher:Institute of Physics Publishing
Abstract:Three types of pulses are experimentally investigated in a switchable normal-dispersion nanotube-mode-locked fiber laser by adjusting polarizer controller and pump power. They are a standard dissipative-soliton (DS), conventional soliton (CS)-like pulse, and noiselike pulse, which correspond to three mode-locking states. The standard DS with a rectangular spectrum possesses a Gaussian-shape pulse. The CS-like operation has a Lorenz shape, and the spectrum involves several sidebands similar to the CS case. For the noiselike pulse with a bell-shaped spectrum, a 317 fs peak rides upon the 132.5 ps pedestal in the autocorrelation trace. The spectra of these three pulse operations are centered at three close wavelengths. The generation of three such different types of pulses in one identical normal- dispersion laser cavity may find an important application for the future of mode-locked laser research. &copy; 2015 Astro Ltd.
Number of references:80
Main heading:Mode-locked fiber lasers
Controlled terms:Dispersion (waves) - Fiber lasers - Lasers - Locks (fasteners) - Nanotubes - Optical pumping - Pumping (laser) - Solitons - Yarn
Uncontrolled terms:Dissipative solitons - Gaussian shape - Mode-locked laser - Normal dispersion - Polarizer controller - Pulse operation - Pump power - Switchable
Classification code:601.3  Mechanisms - 711.1  Electromagnetic Waves in Different Media - 741.1  Light/Optics - 741.1.2  Fiber Optics - 744.1  Lasers, General - 744.4  Solid State Lasers - 761  Nanotechnology - 819.4  Fiber Products - 931.3  Atomic and Molecular Physics
DOI:10.1088/1054-660X/25/7/075101

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 111>

Accession number:20151100635592
Title:High-precision positioning system of four-quadrant detector based on the database query
Authors:Zhang, Xin (1); Deng, Xiao-Guo (1); Su, Xiu-Qin (1); Zheng, Xiao-Qiang (1, 2)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an, China; (2) Graduate University of Chinese Academy of Sciences, Beijing, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9449
Volume title:International Conference on Photonics and Optical Engineering, icPOE 2014
Part number:1 of 1
Issue date:2015
Publication year:2015
Article number:94492R
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628415650
Document type:Conference article (CA)
Conference name:International Conference on Photonics and Optical Engineering, icPOE 2014
Conference date:October 13, 2014  -  October 15, 2014
Conference location:Xi'an, China
Conference code:111356
Sponsor:Optics and Photonics Society of Singapore; Shaanxi Optical Society; Shaanxi Provincial Physical Society
Publisher:SPIE
Abstract:The fine pointing mechanism of the Acquisition, Pointing and Tracking (APT) system in free space laser communication usually use four-quadrant detector (QD) to point and track the laser beam accurately. The positioning precision of QD is one of the key factors of the pointing accuracy to APT system. A positioning system is designed based on FPGA and DSP in this paper, which can realize the sampling of AD, the positioning algorithm and the control of the fast swing mirror. We analyze the positioning error of facular center calculated by universal algorithm when the facular energy obeys Gauss distribution from the working principle of QD. A database is built by calculation and simulation with MatLab software, in which the facular center calculated by universal algorithm is corresponded with the facular center of Gaussian beam, and the database is stored in two pieces of E<sup>2</sup>PROM as the external memory of DSP. The facular center of Gaussian beam is inquiry in the database on the basis of the facular center calculated by universal algorithm in DSP. The experiment results show that the positioning accuracy of the high-precision positioning system is much better than the positioning accuracy calculated by universal algorithm. &copy; 2015 SPIE.
Number of references:7
Main heading:Database systems
Controlled terms:Algorithms - Computer software - Digital signal processing - Field programmable gate arrays (FPGA) - Gaussian beams - Gaussian distribution - Laser beams - MATLAB - Photonics - Query processing
Uncontrolled terms:Acquisition , pointing and tracking - Database queries - DSP - Four quadrant detectors - Free space laser communications - High precision positioning - Positioning algorithms - Positioning precision
Classification code:711  Electromagnetic Waves - 712  Electronic and Thermionic Materials - 717  Optical Communication - 721.3  Computer Circuits - 723  Computer Software, Data Handling and Applications - 744  Lasers - 744.8  Laser Beam Interactions - 921  Mathematics - 922.1  Probability Theory
DOI:10.1117/12.2075695

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 112>

Accession number:20155301741635
Title:High speed random number generator based on digitizing bandwidth-enhanced chaotic laser signal
Authors:Yan, Qiurong (1); Cao, Qingshan (1); Zhao, Baosheng (2); Zhang, Hua (1); Liao, Qinghong (1)
Author affiliation:(1) Information Engineering School, Nanchang University, Nanchang; Jiangxi, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; Shaanxi, China
Source title:Zhongguo Jiguang/Chinese Journal of Lasers
Abbreviated source title:Zhongguo Jiguang
Volume:42
Issue:11
Issue date:November 10, 2015
Publication year:2015
Article number:1102004
Language:Chinese
ISSN:02587025
CODEN:ZHJIDO
Document type:Journal article (JA)
Publisher:Science Press
Abstract:A high speed random number generator based on digitizing bandwidth-enhanced chaotic laser signal is proposed and demonstrated. In order to remove the weak periodicity in optical feedback chaotic semiconductor laser signal, the optical feedback chaotic semiconductor laser is injected into another semiconductor laser to obtain a bandwidth-enhanced chaotic laser signal. The bandwidth-enhanced chaotic laser signal is converted using an 8-bit high speed analog-to-digital convertor to achieve generating multi bits by each sampling point. In order to remove the bias existing in original extracted random bits and improve the efficiency of random bit generation, fieldprogrammable gate array based secure hash algorithm 256 is proposed to extract random bit. Due to the use of 4-channel parallel processing technology, online random number generation rate of 2.94 Gbit/s is obtained and each sample could produce average 4.65 random bits. The obtained random numbers pass all the tests in random testing program of ENT and STS. &copy; 2015, Chinese Laser Press. All right reserved.
Number of references:26
Page count:7
Main heading:Random number generation
Controlled terms:Analog to digital conversion - Bandwidth - Feedback - Hash functions - Laser optics - Number theory - Secure communication - Semiconductor lasers - Software testing - Testing
Uncontrolled terms:Bandwidth enhanced - Chaotic lasers - Chaotic semiconductor lasers - High-speed analog - Parallel-processing technology - Random bit generations - Random number generators - Secure hash algorithm
Classification code:716.1  Information Theory and Signal Processing - 723.5  Computer Applications - 731.1  Control Systems - 744.1  Lasers, General - 744.4.1  Semiconductor Lasers - 922.2  Mathematical Statistics
DOI:10.3788/CJL201542.1102004

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 113>

Accession number:20143600030687
Title:Passively Q-switched Nd:GGG laser with a SWCNT as saturable absorber
Authors:Chu, Hongwei (1); Zhao, Shengzhi (1); Yang, Kejian (1); Li, Yufei (1); Li, Dechun (1); Li, Guiqiu (1); Zhao, Jia (1); Qiao, Wenchao (1); Li, Tao (1); Wang, Yonggang (2); Wang, Yishan (2)
Author affiliation:(1) School of Information and Science Engineering, Shandong University, Jinan, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi&rsquo;an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi&rsquo;an, China
Corresponding author:Zhao, Shengzhi
Source title:Optical and Quantum Electronics
Abbreviated source title:Opt Quantum Electron
Volume:47
Issue:3
Issue date:2015
Publication year:2015
Pages:697-703
Language:English
ISSN:03068919
E-ISSN:1572817X
CODEN:OQELDI
Document type:Journal article (JA)
Publisher:Springer New York LLC
Abstract:A diode-pumped passively Q-switched Nd:GGG laser with a single-walled carbon nanotube as saturable absorber has been realized. A maximum average output power of 1.24&nbsp;W and a minimum pulse duration of 49.8&nbsp;ns were obtained at the incident pump power of 7.69&nbsp;W. Corresponding to a maximum single pulse energy and a highest peak power were 4.3&nbsp;&mu;J and 85&nbsp;W, respectively. The pulse repetition rates varied from 62 to 292&nbsp;kHz versus the increase of the incident pump power. &copy; 2014, Springer Science+Business Media New York.
Number of references:26
Main heading:Saturable absorbers
Controlled terms:Optical pumping - Pulse repetition rate - Pumping (laser) - Q switched lasers - Q switching - Single-walled carbon nanotubes (SWCN) - Yarn
Uncontrolled terms:Average output power - Diode-pumped - Incident pump power - Passive Q switches - Passively Q-switched - Peak power - Pulse durations - Single pulse energy
Classification code:741.1  Light/Optics - 744.1  Lasers, General - 744.8  Laser Beam Interactions - 761  Nanotechnology - 819.4  Fiber Products
DOI:10.1007/s11082-014-9945-8

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 114>

Accession number:20161602266803
Title:Maximum projection and velocity estimation algorithm for small moving target detection in space surveillance
Authors:Yao, Dalei (1, 2, 3); Wen, Desheng (2); Xue, Jianru (1); Chen, Zhi (2); Wen, Yan (2); Jiang, Baotan (2); Ma, Junyong (2)
Author affiliation:(1) Xi'an Jiaotong University, Xi'an, China; (2) Xi'An Institute of Optics and Precision Mechanics of CAS, Xi'an, China; (3) University of Chinese Academy of Sciences, Beijing, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9675
Monograph title:AOPC 2015: Image Processing and Analysis
Issue date:2015
Publication year:2015
Article number:96752H
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628419009
Document type:Conference article (CA)
Conference name:Applied Optics and Photonics, China: Image Processing and Analysis, AOPC 2015
Conference date:May 5, 2015  -  May 7, 2015
Conference location:Beijing, China
Conference code:117481
Sponsor:Chinese Society for Optical Engineering
Publisher:SPIE
Abstract:The article presents a new method to detect small moving targets in space surveillance. Image sequences are processed to detect and track targets under the assumption that the data samples are spatially registered. Maximum value projection and normalization are performed to reduce the data samples and eliminate the background clutter. Targets are then detected through connected component analysis. The velocities of the targets are estimated by centroid localization and least squares regression. The estimated velocities are utilized to track the targets. A sliding neighborhood operation is performed prior to target detection to significantly reduce the computation while preserving as much target information as possible. Actual data samples are acquired to test the proposed method. Experimental results show that the method can efficiently detect small moving targets and track their traces accurately. The centroid locating precision and tracking accuracy of the method are within a pixel. &copy; 2015 SPIE.
Number of references:11
Main heading:Image processing
Controlled terms:Algorithms - Clutter (information theory) - Computer vision - Error detection - Image analysis - Optical data processing - Space surveillance - Target tracking - Velocity
Uncontrolled terms:Clutter rejection - Connected component analysis - Image sequence - Least squares regression - Maximum value projections - Small moving target - Small moving target detections - Velocity estimation
Classification code:656.2  Space Research - 716.1  Information Theory and Signal Processing - 723.2  Data Processing and Image Processing - 723.5  Computer Applications
DOI:10.1117/12.2202360

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 115>

Accession number:20161602271437
Title:Optical technologies for space sensor
Authors:Wang, Hu (1, 2); Liu, Jie (2); Xue, Yaoke (2); Liu, Yang (2); Liu, Meiying (2); Wang, Lingguang (2); Yang, Shaodong (2); Lin, Shangmin (2); Chen, Su (2); Luo, Jianjun (1)
Author affiliation:(1) School of Astronautics, Northwestern Polytechnical University, Xi'an, Shaanxi, China; (2) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, Shaanxi, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9678
Monograph title:AOPC 2015: Telescope and Space Optical Instrumentation
Issue date:2015
Publication year:2015
Article number:96780B
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628419030
Document type:Conference article (CA)
Conference name:Applied Optics and Photonics, China: Telescope and Space Optical Instrumentation, AOPC 2015
Conference date:May 5, 2015  -  May 7, 2015
Conference location:Beijing, China
Conference code:117482
Sponsor:Chinese Society for Optical Engineering
Publisher:SPIE
Abstract:Space sensors are used in navigation sensor fields. The sun, the earth, the moon and other planets are used as frame of reference to obtain stellar position coordinates, and then to control the attitude of an aircraft. Being the"eyes"of the space sensors, Optical sensor system makes images of the infinite far stars and other celestial bodies. It directly affects measurement accuracy of the space sensor, indirectly affecting the data updating rate. Star sensor technology is the pilot for Space sensors. At present more and more attention is paid on all-day star sensor technology. By day and night measurements of the stars, the aircraft's attitude in the inertial coordinate system can be provided. Facing the requirements of ultra-high-precision, large field of view, wide spectral range, long life and high reliability, multi-functional optical system, we integration, integration optical sensors will be future space technology trends. In the meantime, optical technologies for space-sensitive research leads to the development of ultra-precision optical processing, optical and precision test machine alignment technology. It also promotes the development of long-life optical materials and applications. We have achieved such absolute distortion better than &plusmn;1um, Space life of at least 15years of space-sensitive optical system. &copy; 2015 SPIE.
Number of references:28
Main heading:Fighter aircraft
Controlled terms:Moon - Optical instruments - Optical sensors - Optical systems - Stars - Telescopes - Tracking (position)
Uncontrolled terms:All-day - Long-time - Space sensors - Star sensors - Ultra precision
Classification code:652.1.2  Military Aircraft - 657.2  Extraterrestrial Physics and Stellar Phenomena - 741.3  Optical Devices and Systems - 941.3  Optical Instruments
DOI:10.1117/12.2197608

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 116>

Accession number:20161502216517
Title:Emif: Towards a scalable and effective indexing framework for large scale music retrieval
Authors:Shen, Jialie (1); Mei, Tao (2); Tao, Dacheng (3); Li, Xuelong (4); Rui, Yong (2)
Author affiliation:(1) Singapore Management University, Singapore, Singapore; (2) Microsoft Research Asia, Beijing, China; (3) University of Technology, Sydney, Australia; (4) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
Source title:ICMR 2015 - Proceedings of the 2015 ACM International Conference on Multimedia Retrieval
Abbreviated source title:ICMR - Proc. ACM Int. Conf. Multimed. Retr.
Monograph title:ICMR 2015 - Proceedings of the 2015 ACM International Conference on Multimedia Retrieval
Issue date:June 22, 2015
Publication year:2015
Pages:543-546
Language:English
ISBN-13:9781450332743
Document type:Conference article (CA)
Conference name:5th ACM International Conference on Multimedia Retrieval, ICMR 2015
Conference date:June 23, 2015  -  June 26, 2015
Conference location:Shanghai, China
Conference code:116836
Sponsor:ACM SIGMM; Google; Samsung; Tencent; ViSENZE
Publisher:Association for Computing Machinery, Inc
Abstract:This article presents a novel indexing framework called EMIF (Effective Music Indexing Framework) to facilitate scalable and accurate content based music retrieval. EMIF system architecture is designed based on a "classification-and-indexing" principle and consists of two main functionality layers: 1) a novel semantic-sensitive classification to identify input music's category and 2) multiple indexing structures - one local indexing structure corresponds to one semantic category. EMIF's layered architecture not only enables superior search accuracy but also reduces query response time significantly. To evaluate the system, a set of comprehensive experimental studies have been carried out using large test collection and EMIF demonstrates promising performance over state-of-theart approaches. &copy; Copyright 2015 ACM.
Number of references:17
DOI:10.1145/2671188.2749346

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 117>

Accession number:20153501209514
Title:Development of 60 km mobile Rayleigh wind lidar
Authors:Han, Yan (1, 2, 3); Sun, Dongsong (1); Weng, Ningquan (2); Dou, Xiankang (1); Wang, Jianguo (3); Zhang, Yanhong (3)
Author affiliation:(1) School of Earth and Space Sciencesa, University of Science and Technology of China, Hefei, China; (2) Key Laboratory of Atmospheric Composition and Optical Radiation, Anhui Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Hefei, China; (3) Northwest Institute of Nuclear Technology of China, Xi'an, China
Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering
Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.
Volume:44
Issue:5
Issue date:May 25, 2015
Publication year:2015
Pages:1414-1419
Language:Chinese
ISSN:10072276
Document type:Journal article (JA)
Publisher:Chinese Society of Astronautics
Abstract:Recently, the wind field in the altitude range 25-60 km is still poorly monitored in real time, therefore the 60 km mobile Rayleigh wind lidar based on a Fabry-Perot etalon was developed for wind measurement. The overall structure of this lidar system was described in detail. The design of the subsystems of this lidar was indroduced elaborately. In order to improve the accuracy of wind measurement, experiment was designed to calibrate the transmission curves of FPI, and the calibration method was presented. The transmission curves of FPI were calibrated experimentally, and the standard deviations for parameters of FPI are less than 0.06 in the calibrated experiments. The developed lidar has observed the wind of 15-60 km altitudes over Delingha, and wind velocity and direction profiles were obtained. Observations of lidar were compared with the rawinsondes', and the compared result show good agreement between both measurements. Measure error was calculated, wind velocity and direction errors of the measurements are less than 4 m/s and 6&deg; respectively when it is lower than 40 km. They are less than 8 m/s and 18&deg; when it is higher than 40 km. Wind observations demonstrate that the lidar has the expected good performances. &copy;, 2015, Chinese Society of Astronautics. All right reserved.
Number of references:8
Main heading:Flow visualization
Controlled terms:Calibration - Etalons - Fabry-Perot interferometers - Optical radar - Wind
Uncontrolled terms:Calibration method - Direct detection - F-P etalon - Fabry-Perot etalons - Standard deviation - Transmission curve - Transmission function - Wind velocity and direction
Classification code:443.1  Atmospheric Properties - 631.1  Fluid Flow, General - 716.2  Radar Systems and Equipment - 941  Acoustical and Optical Measuring Instruments - 941.3  Optical Instruments - 942  Electric and Electronic Measuring Instruments - 943  Mechanical and Miscellaneous Measuring Instruments - 944  Moisture, Pressure and Temperature, and Radiation Measuring Instruments

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 118>

Accession number:20151100635528
Title:MTF online compensation in space optical remote sensing camera
Authors:Qu, Youshan (1); Zhai, Bo (1); Han, Yameng (1); Zhou, Jiang (1, 2)
Author affiliation:(1) Xi'an Institute of Optics and Precise Mechanics of CAS, Xi'an, China; (2) Graduate University of Chinese Academy Sciences, Beijing, China
Corresponding author:Qu, Youshan
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9449
Volume title:International Conference on Photonics and Optical Engineering, icPOE 2014
Part number:1 of 1
Issue date:2015
Publication year:2015
Article number:94490F
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628415650
Document type:Conference article (CA)
Conference name:International Conference on Photonics and Optical Engineering, icPOE 2014
Conference date:October 13, 2014  -  October 15, 2014
Conference location:Xi'an, China
Conference code:111356
Sponsor:Optics and Photonics Society of Singapore; Shaanxi Optical Society; Shaanxi Provincial Physical Society
Publisher:SPIE
Abstract:An ordinary space optical remote sensing camera is an optical diffraction-limited system and a low-pass filter from the theory of Fourier Optics, and all the digital imaging sensors, whether the CCD or CMOS, are low-pass filters as well. Therefore, when the optical image with abundant high-frequency components passes through an optical imaging system, the profuse middle-frequency information is attenuated and the rich high-frequency information is lost, which will blur the remote sensing image. In order to overcome this shortcoming of the space optical remote sensing camera, an online compensating approach of the Modulation Transfer Function in the space cameras is designed. The designed method was realized by a hardware analog circuit placed before the A/D converter, which was composed of adjustable low-pass filters with a calculated value of quality factor Q. Through the adjustment of the quality factor Q of the filters, the MTF of the processed image is compensated. The experiment results display that the realized compensating circuit in a space optical camera is capable of improving the MTF of an optical remote sensing imaging system 30% higher than that of no compensation. This quantized principle can efficiently instruct the MTF compensating circuit design in practice. &copy; 2015 SPIE.
Number of references:15
Main heading:Optical transfer function
Controlled terms:Analog circuits - Analog to digital conversion - Biped locomotion - Cameras - Fourier optics - Geometrical optics - Image enhancement - Image processing - Image reconstruction - Imaging systems  - Integrated circuit manufacture - Low pass filters - Modulation - Optical data processing - Photonics - Power inductors - Remote sensing - Signal filtering and prediction - Social networking (online) - Space optics  - Transfer functions
Uncontrolled terms:Compensating circuits - Digital imaging sensors - High frequency components - High-frequency informations - Online compensation - Optical imaging system - Optical remote sensing - Space cameras
Classification code:703.2  Electric Filters - 713  Electronic Circuits - 714  Electronic Components and Tubes - 714.2  Semiconductor Devices and Integrated Circuits - 716  Telecommunication; Radar, Radio and Television - 717  Optical Communication - 718  Telephone Systems and Related Technologies; Line Communications - 722.4  Digital Computers and Systems - 723  Computer Software, Data Handling and Applications - 723.2  Data Processing and Image Processing - 731.1  Control Systems - 741  Light, Optics and Optical Devices - 742.2  Photographic Equipment - 746  Imaging Techniques - 931.1  Mechanics
DOI:10.1117/12.2076000

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 119>

Accession number:20154501522426
Title:Preparation andproperty of HKT800 carbon fiber/AG80 epoxy resin composite
Authors:Gu, Hongxing (1, 2); Wang, Haojing (1); Fan, Lidong (1); Zhang, Shubin (1); Pang, Peidong (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China
Corresponding author:Wang, Haojing
Source title:Gongneng Cailiao/Journal of Functional Materials
Abbreviated source title:Gongneng Cailiao
Volume:46
Issue:15
Issue date:August 15, 2015
Publication year:2015
Pages:15007-15010
Language:Chinese
ISSN:10019731
CODEN:GOCAEA
Document type:Journal article (JA)
Publisher:Journal of Functional Materials
Abstract:The surface topography, elements, functional groups of HKT800 carbon fiber were characterized, the recipe of AG80 epoxy resin was optimized, then the mechanical and interface performance of HKT800 carbon fiber/AG80 epoxy resin composite were analyzed. The results showed that: the ratio of O/C and N/C in surface elements reached 25.2% and 4.5%, the ratio of active carbon atoms was 0.91, so the surface activity of HKT800 carbon fiber was higher. The epoxy resin could be cured at 150 when the mass ratio of AG80, DDS, BF<inf>3</inf>&middot;MEA was 100:30:3. The tensile, flexural and compression strength of HKT800 carbon fiber/AG80 epoxy resin composite were 2 682, 1 874 and 1 639 MPa, interlayer shear strength was 110 MPa. &copy;, 2015, Journal of Functional Materials. All right reserved.
Number of references:11
Main heading:Epoxy resins
Controlled terms:Carbon fibers - Composite materials - Fibers - Surface topography
Uncontrolled terms:AG80 - Compression strength - Epoxy resin composites - HKT800 - Interface performance - Interlayer shear strength - Properties - Surface activities
Classification code:804  Chemical Products Generally - 815.1.1  Organic Polymers - 931.2  Physical Properties of Gases, Liquids and Solids - 951  Materials Science
DOI:10.3969/j.issn.1001-9731.2015.15.002

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 120>

Accession number:20152901038826
Title:Simultaneous bidirectional link selection in full duplex MIMO systems
Authors:Zhou, Mingxin (1); Song, Lingyang (1); Li, Yonghui (2); Li, Xuelong (3)
Author affiliation:(1) State Key Laboratory of Advanced Optical Communication Systems and Networks, School of Electronics Engineering and Computer Science, Peking University, Beijing, China; (2) School of Electrical and Information Engineering, University of Sydney, Sydney; N.S.W., Australia; (3) Center for OPTical IMagery Analysis and Learning (OPTIMAL), State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Xi'an, China
Source title:IEEE Transactions on Wireless Communications
Abbreviated source title:IEEE Trans. Wireless Commun.
Volume:14
Issue:7
Issue date:July 1, 2015
Publication year:2015
Pages:4052-4062
Article number:7066969
Language:English
ISSN:15361276
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:In this paper, we consider a point to point full duplex (FD) MIMO communication system. We assume that each node is equipped with an arbitrary number of antennas which can be used for transmission or reception. With FD radios, bidirectional information exchange between two nodes can be achieved at the same time. In this paper, we design bidirectional link selection schemes by selecting a pair of transmit and receive antenna at both ends for communications in each direction to maximize the weighted sum rate or minimize the weighted sum symbol error rate (SER). The optimal selection schemes require exhaustive search, so they are highly complex. To tackle this problem, we propose a Serial-Max selection algorithm, which approaches the exhaustive search methods with much lower complexity. In the Serial-Max method, the antenna pairs with maximum 'obtainable SINR' at both ends are selected in a two-step serial way. The performance of the proposed Serial-Max method is analyzed, and the closed-form expressions of the average weighted sum rate and the weighted sum SER are derived. The analysis is validated by simulations. Both analytical and simulation results show that as the number of antennas increases, the Serial-Max method approaches the performance of the exhaustive-search schemes in terms of sum rate and sum SER. &copy; 2015 IEEE.
Number of references:28
Main heading:Antennas
Controlled terms:Finite difference method - MIMO systems - Receiving antennas
Uncontrolled terms:Bi-directional links - Closed-form expression - Full-duplex - Information exchanges - MIMO communication system - Selection algorithm - Selection methods - Symbol error rate (SER)
Classification code:716  Telecommunication; Radar, Radio and Television - 921.6  Numerical Methods - 961  Systems Science
DOI:10.1109/TWC.2015.2416187

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 121>

Accession number:20151100636405
Title:Image quality assessment: A sparse learning way
Authors:Yuan, Yuan (1); Guo, Qun (1); Lu, Xiaoqiang (1)
Author affiliation:(1) Center for OPTical IMagery Analysis and Learning (OPTIMAL), State Key Laboratory of Transient Optics and Photonics, Xian Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xian, Shaanxi, China
Corresponding author:Lu, Xiaoqiang
Source title:Neurocomputing
Abbreviated source title:Neurocomputing
Volume:159
Issue:1
Issue date:2015
Publication year:2015
Pages:227-241
Language:English
ISSN:09252312
E-ISSN:18728286
CODEN:NRCGEO
Document type:Journal article (JA)
Publisher:Elsevier
Abstract:Full reference image quality assessment is very important for many image processing applications. The challenge of image quality assessment lies in two aspects: (1) formulating perceptual meaningful features and (2) finding a way to pool them into a single quality score. A novel two-step approach is proposed to address these problems. In the first step, sparse representations of local image patches are computed to simulate the low level characteristic of the human vision system (HVS) and represent the meaningful image structures. The differences between the representations of distorted and undistorted patches are utilized to measure the local distortion. In the second step, these local distortion measurements are fused into a single image quality score by using kernel ridge regression (KRR). Kernel ridge regression can mimic the complex high level behaviors of human vision system and is shown to be an effective way to learn the relationship between local quality measurements and quality score. The contributions of this paper would be summarized as follows: (1) extracting approximate perceptual meaningful features in image quality assessment is transformed as a sparse representation problem. In this case, the sparse representation coefficients can reflect the salient local structures and give local quality assessments. (2) The KRR is utilized to pool the local quality assessments into a single image quality score. Thus, the nonlinear relationship between the objective model outputs and the subjective quality ratings can be learned by exploiting the KRR. (3) Extensive experiments are conducted on six public databases. Compared with other approaches, the proposed approach has achieved the best performance, which demonstrates the effectiveness and robustness of the proposed approach. &copy; 2015 Elsevier B.V.
Number of references:50
Main heading:Image quality
Controlled terms:Artificial intelligence - Behavioral research - Computer vision - Face recognition - Image processing - Lakes - Learning systems - Quality control - Regression analysis
Uncontrolled terms:Full references - Image processing applications - Image quality assessment (IQA) - Kernel ridge regression (KRR) - Kernel ridge regressions - Non-linear relationships - Sparse learning - Subjective quality ratings
DOI:10.1016/j.neucom.2015.01.066

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 122>

Accession number:20152500946859
Title:The research of the light source for star simulator with automatic calibration and adjustable spectrum
Authors:Li, Xiao-Ni (1, 2); Wu, Cui-Gang (1); Zhao, Xin (3); Lu, Zhen-Hua (1); Xie, Lai-Yun (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China; (3) Military Representative Office Positioned in 699 Factory of PLA, Beijing, China
Corresponding author:Wu, Cui-Gang
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:44
Issue:5
Issue date:May 1, 2015
Publication year:2015
Article number:0522003
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:In order to obtain the star simulator sources system of the adjustable spectrum with more color temperatures and more magnitudes and it can be calibrated automatically in a wide range of spectral bands. Embarking from the amplitude and colorimetry, This paper realize the automatic calibrating multispectral light star simulator system which the color temperature is continuous adjustable from 3900 K to 6500 K and the magnitudes is 1 MV adjustable in -1 MV~+6 MV with double integrating spheres in 400 nm~900 nm spectral range, The light system is based on the least squares method and the white LED are treated as the main body, a variety of different peak wavelength and narrow-band spectrum LEDs to compensate the objective spectrum. Finally, the source system and star simulator are completed and debugged in the laboratory, and the results are compared with the theoretical simulation values and standard visual magnitudes. The results show that the star simulator spectrum simulation error and magnitude error are within the range of &plusmn;10% and &plusmn;10% respectively and meet the stage star sensor needs, At the same time, In ensuring the stability of the control circuit, magnitude error can be within the range of &plusmn;5%. &copy;, 2015, Chinese Optical Society. All right reserved.
Number of references:14
Page count:6
Main heading:Stars
Controlled terms:Calibration - Color - Colorimetry - Errors - Least squares approximations - Light emitting diodes - Light sources - Program debugging - Simulators
Uncontrolled terms:Alterable spectrum - Calibrate automatically - Integrating spheres - Multi-colors - Multi-magnitudes
Classification code:621  Nuclear Reactors - 657.2  Extraterrestrial Physics and Stellar Phenomena - 671  Naval Architecture - 723.1  Computer Programming - 731  Automatic Control Principles and Applications - 741.1  Light/Optics - 921  Mathematics - 921.6  Numerical Methods - 941  Acoustical and Optical Measuring Instruments - 941.4  Optical Variables Measurements - 942  Electric and Electronic Measuring Instruments - 943  Mechanical and Miscellaneous Measuring Instruments - 944  Moisture, Pressure and Temperature, and Radiation Measuring Instruments
DOI:10.3788/gzxb20154405.0522003

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 123>

Accession number:20151600765014
Title:Super resolution ISAR imaging in receiver centered region area in bistatic radar
Authors:Zhang, Long (1, 2); Su, Tao (1); Liu, Zheng (1); He, Xiao-Hui (1, 2); Duan, Yong-Qiang (3)
Author affiliation:(1) National Key Lab. of Radar Signal Processing, Xidian University, Xi'an, China; (2) College of Electronics and Information, Xi'an Polytechnic University, Xi'an, China; (3) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy Sciences, Xi'an, China
Corresponding author:Zhang, Long
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:44
Issue:3
Issue date:March 1, 2015
Publication year:2015
Article number:0328002
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:For the time-variant property of bistatic angles in Receiver Centered Region Area in bistatic radar system, it's difficult to obtain high resolution ISAR image of target in by using the conventional imaging methods. The signal model for bistatic ISAR was presented, then the time-variant property of the bistatic angles and its influence on range envelope and azimuth was analyzed. A Radon-TCDS-Relax super-resolution imaging method was brought up for eliminate the effect from high-order azimuth terms of target motion model in receiver centered areas. The chirp rate and its changing rate corresponding to high-order phase terms in cross range was estimated by the proposed method. Scatterers extracting and imaging were achieved by Radon-TCDS-RELAX and TCD-RID respectively. Accuracy analysis and the experimental results with real data both demonstrate the effectiveness of the proposed method. &copy;, 2015, Chinese Optical Society. All right reserved.
Number of references:16
Page count:8
Main heading:Radar imaging
Controlled terms:Image reconstruction - Motion analysis - Optical resolving power - Radar - Radar systems - Radon
Uncontrolled terms:Bistatic radars - ISAR Imaging - Radon Transform - Super resolution - Time chirp distribution search
Classification code:716.2  Radar Systems and Equipment - 741  Light, Optics and Optical Devices - 741.1  Light/Optics - 804  Chemical Products Generally
DOI:10.3788/gzxb20154403.0328002

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 124>

Accession number:20154701578992
Title:A novel design of high-throughout hard ware implementation for video decoding based on H.264
Authors:Wang, Yi (1, 2); Su, Xiuqin (1)
Author affiliation:(1) Key Laboratory of Ultrafast Photoelectric Diagnostics Technology, Xi an Institute of Optics and Precision Mechanics of CAS, Xi'an, China; (2) University of CAS, Beijing, China
Corresponding author:Wang, Yi
Source title:Metallurgical and Mining Industry
Abbreviated source title:Metall. Min. Ind.
Volume:7
Issue:9
Issue date:2015
Publication year:2015
Pages:696-704
Language:English
ISSN:20760507
E-ISSN:20788312
Document type:Journal article (JA)
Publisher:Ukrmetallurginform Scientific and Technical Agency Ltd
Abstract:In this paper, a novel high-throughput implementation for video decoding based on H.264 is proposed to improve the decoding efficiency. H.264 provides many new functions than previous video coding algorithm that bring more complex computations, Therefore, How t implementation of the decoder efficiency becomes a challenging. Research shows in the decoding flow there are many data dependency among different symbols. Especially in the entropy decoding this dependence is most obvious. Thence the CAVLC decoder requires large computation time, which administrates the overall decoder system performance. In order to improve performance of CAVLC decoder, the CAVLC decoder procedure is first analyzed. This paper presents a one decoding procedure double level resolve design for H.264 CAVLC decoding. In the proposed design, we exploit a predict method to achieve double level decoding. Besides the implementation of heading one detector is based on statistical results to improve efficiency of the decoder. Emulation results show that the calculation operation period of the implementation architecture can be reduced about 28% compare with the tradition CAVLC architecture. The maximum frequency can be larger than 216 MHz.
Number of references:21
Main heading:Decoding
Controlled terms:Efficiency - Entropy
Uncontrolled terms:Decoding efficiency - Double level - Entropy decoding - H.264 - High throughput implementation - Implementation architecture - Prediction mechanisms - Video coding algorithm
Classification code:641.1  Thermodynamics - 723.2  Data Processing and Image Processing - 913.1  Production Engineering

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 125>

Accession number:20160701924885
Title:Nanoslit-microcavity-based narrow band absorber for sensing applications
Authors:Lu, Xiaoyuan (1); Zhang, Lingxuan (1); Zhang, Tongyi (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
Source title:Optics Express
Abbreviated source title:Opt. Express
Volume:23
Issue:16
Issue date:August 10, 2015
Publication year:2015
Pages:20715-20720
Language:English
E-ISSN:10944087
Document type:Journal article (JA)
Publisher:OSA - The Optical Society
Abstract:We propose an ultranarrow bandwidth perfect infrared absorber consisting of a metal periodic structured surface with nanoslits, a spacer dielectric, and a metal back plate. Its bandwidth and aborption are respectively about 8 nm and 95%. The thickness of the nanobars and the spacer, and the width of the nanoslits are primary factors determining the absorption performance. This structure not only has narrow bandwidth but also can obtain the giant electric field enhancement in the tiny volume of the nanoslits. Operated as a refractive index sensor, this structure has figure of merit as high as 25. It has potential in biomedical and sensing applications. &copy; 2015 Optical Society of America.
Number of references:33
Main heading:Nanostructures
Controlled terms:Bandwidth - Electric fields - Plate metal - Refractive index - Refractometers
Uncontrolled terms:Absorption performance - Electric field enhancement - Figure of merits - Narrow bandwidth - Refractive index sensor - Sensing applications - Structured surfaces - Ultra-narrow bandwidth
Classification code:701.1  Electricity: Basic Concepts and Phenomena - 716.1  Information Theory and Signal Processing - 741.1  Light/Optics - 761  Nanotechnology - 933  Solid State Physics - 941.3  Optical Instruments
DOI:10.1364/OE.23.020715

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 126>

Accession number:20152500957390
Title:Picosecond laser machining of deep holes in silicon infiltrated silicon carbide ceramics
Authors:Zhang, Qing (1); Wang, Chunhui (1); Liu, Yongsheng (1); Zhang, Litong (1); Cheng, Guanghua (2)
Author affiliation:(1) Science and Technology on Thermostructure Composite Materials Laboratory, Northwestern Polytechnical University, Xi&rsquo;an, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi&rsquo;an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi&rsquo;an, China
Corresponding author:Zhang, Qing
Source title:Journal Wuhan University of Technology, Materials Science Edition
Abbreviated source title:J Wuhan Univ Technol Mater Sci Ed
Volume:30
Issue:3
Issue date:June 22, 2015
Publication year:2015
Pages:437-441
Language:English
ISSN:10002413
CODEN:JWUTE8
Document type:Journal article (JA)
Publisher:Wuhan Ligong Daxue
Abstract:Silicon infiltrated silicon carbide (Si-SiC) ceramics, as high hardness materials, are difficult to machine, especially drilling micro-holes. In this study, the interaction of picosecond laser pulses (1 ps at 1 030 nm) with Si-SiC ceramics was investigated. Variations of the diameter and depth of circular holes with the growth of the laser energy density were obtained. The results indicate that the increase of machining depth follows a nonlinear relation with the increasing of laser energy density, while the diameter has little change with that. Moreover, it is found that some debris and particles are deposited around and inside the holes and waviness is in the entrance and at walls of the holes after laser processing. &copy; 2015, Wuhan University of Technology and Springer-Verlag Berlin Heidelberg.
Number of references:22
Main heading:Ceramic materials
Controlled terms:Silicon - Silicon carbide - Structural ceramics
Uncontrolled terms:Circular holes - Deep holes - High hardness materials - Laser energy density - Nonlinear relations - Picosecond laser - Picosecond laser pulse - Silicon carbide ceramic
Classification code:712.1.1  Single Element Semiconducting Materials - 812.1  Ceramics - 812.2  Refractories
DOI:10.1007/s11595-015-1167-9

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 127>

Accession number:20152100871875
Title:Research on large dynamic range streak camera based on electron-bombarded CCD
Authors:Zhu, Min (1, 2); Tian, Jin-Shou (1); Wen, Wen-Long (1); Wang, Jun-Feng (1); Cao, Xi-Bin (1); Lu, Yu (1); Xu, Xiang-Yan (1); Sai, Xiao-Feng (1); Liu, Hu-Lin (1); Wang, Xing (1); Li, Wei-Hua (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China
Corresponding author:Zhu, Min
Source title:Wuli Xuebao/Acta Physica Sinica
Abbreviated source title:Wuli Xuebao
Volume:64
Issue:9
Issue date:May 5, 2015
Publication year:2015
Article number:098501
Language:Chinese
ISSN:10003290
CODEN:WLHPAR
Document type:Journal article (JA)
Publisher:Institute of Physics, Chinese Academy of Sciences
Abstract:In order to detect the weaker on greater span of light signals, the dynamic range, spatial resolution, and the signal to noise ratio of the streak camera need to be improved to meet further diagnostic requirements in scientific area of materials, biology, information, semiconductor physics and energy, etc. Therefore, we design a streak camera with a larger dynamic range based on electron-bombarded CCD. Using the rectangle-framed electrode and electric quadruple lens in the streak camera can reduce its space charge effect and shorten the space charge interaction time by improving electron accelerating voltage to minimize the electron transit time. Using a back-illuminated CCD, which is based on the electron bombardment readout technology as image device to replace the traditional intensified CCD can shorten the chain of image conversion and greatly reduce the image degradation in the conversion of ultrafast diagnostic equipment. The signal to noise ratio, spatial resolution and dynamic range of the streak camera may gain improvement. Experimental results show that the static spatial resolution is better than 35 lp/mm and the dynamic spatial resolution is up to 20 lp/mm. Deflection sensitivity is 60.76 mm/kV and dynamic range reaches 2094: 1. Nonlinear scanning speed is 5.04%. EBS gain of the streak camera can be over 3000. &copy;2015 Chinese Physical Society
Number of references:13
Page count:8
Main heading:CCD cameras
Controlled terms:Electrons - Image resolution - Signal to noise ratio - Streak cameras
Uncontrolled terms:Accelerating voltages - Deflection sensitivities - Dynamic range - Electron bombardments - Electron transit time - Semiconductor physics - Spatial resolution - Ultrafast diagnostics
Classification code:701.1  Electricity: Basic Concepts and Phenomena - 716.1  Information Theory and Signal Processing - 741  Light, Optics and Optical Devices - 742  Cameras and Photography - 742.2  Photographic Equipment
DOI:10.7498/aps.64.098501

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 128>

Accession number:20155201713582
Title:Precision conveyance of microwave photon transmit electricity
Authors:Chen, Ding-Yue (1); Zhang, Yong-Hui (2); Zhou, Ren-Kui (3); Yang, Li (1); Gong, Yong-Yu (1); Yin, Lian-Jie (1); Zhao, Chen-Chuang (1)
Author affiliation:(1) Chang'an University, Xi'an, China; (2) Xi'an Avigation College, Xi'an, China; (3) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
Corresponding author:Chen, Ding-Yue(cdy868@163.com)
Source title:Guangxue Jingmi Gongcheng/Optics and Precision Engineering
Abbreviated source title:Guangxue Jingmi Gongcheng
Volume:23
Issue date:October 1, 2015
Publication year:2015
Pages:209-214
Language:Chinese
ISSN:1004924X
CODEN:GJGOF4
Document type:Journal article (JA)
Publisher:Chinese Academy of Sciences
Abstract:A precision conveyance of microwave photon transmit electricity was researched. The principle of microwave photo transmit electricity and its advantages were introduced. Then, a element configuration and mathematical algorithm models of energy conversion based on the system of remote microwave photon transmit electricity were established. The energy conversion relationships between the blast-off carry and the take-over carry in microwave photon transmit electricity were analyzed. The power SOC (State of Charge) of precision conveyance was researched under ADVISOR software, and power capability was tested on the system of microwave photon transmit electricity. Experimental results show that the system of microwave photon transmit electricity designed and parameter matching are relatively rational, thus the efficient operation of precision conveyance of the purely dynamoelectric type has been achieved. The research helps to enrich and develop the science of microwave photon transmit electricity, and plays an important role in the research and development for new energy precision conveyances. &copy; 2015, Chinese Academy of Sciences. All right reserved.
Number of references:15
Main heading:Microwaves
Controlled terms:Energy conversion - Image matching - Photons - Software testing
Uncontrolled terms:ADVISOR software - Mathematical algorithms - Microwave photon - Parameter matching - Power capability - Precision conveyance - Research and development - State of charge
Classification code:525.5  Energy Conversion Issues - 711  Electromagnetic Waves - 723.5  Computer Applications - 931.3  Atomic and Molecular Physics
DOI:10.3788/OPE.20152313.0209

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 129>

Accession number:20153501209604
Title:Optical design for a kind of simply processed and installed off-axis three-reflection
Authors:Gao, Duorui (1); Hu, Hui (1); Wang, Wei (1); Xie, Xiaoping (1); Han, Biao (1); Su, Yulong (1); Fu, Qiang (2)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; Shannxi, China; (2) Key Laboratory of Fundamental Science for National Defense of Space-Ground Laser Communication Technology, Changchun University of Science and Technology, Changchun; Jilin, China
Source title:Zhongguo Jiguang/Chinese Journal of Lasers
Abbreviated source title:Zhongguo Jiguang
Volume:42
Issue:6
Issue date:June 10, 2015
Publication year:2015
Article number:0616001
Language:Chinese
ISSN:02587025
CODEN:ZHJIDO
Document type:Journal article (JA)
Publisher:Science Press
Abstract:An unobscured reflective optical system with two- mirrors three- reflective is described to reduce off- axis difficulty processing. A piece of aspherical mirrors instead of the primary mirror and third mirror in the traditional off-axis three-reflective system, that is one mirror achieve two mirrors' responsibility, the complexity of the optical processing is reduced, as well as the difficulty of the alignment. Based on the aberration theory of three reflective system, formula of the coaxial structural is deduced, the equation for the system is obtained as well. The parameters of the unobscured off-axial two-mirrors system are that focal length of 1000 mm, F number is 10, field of view is 2&deg; &times; 0.4&deg;, and the surface type of the two mirrors are all quadric surface. From the figure of spot digram, modulation transfer function, point spread function and encircled energy, it is observed that image quality is good and energy is more concentrated. The optical system is designed with small volume, simple structure, and light weight. &copy;, 2015, Science Press. All right reserved.
Number of references:14
Page count:6
Main heading:Mirrors
Controlled terms:Optical design - Optical systems - Optical transfer function
Uncontrolled terms:Aberration theory - Aspheric surfaces - Aspherical mirrors - Off-axis - Optical processing - Reflective optical system - Reflective systems - Simple structures
Classification code:741.1  Light/Optics - 741.3  Optical Devices and Systems
DOI:10.3788/CJL201542.0616001

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 130>

Accession number:20151100646880
Title:Research on remote fluorescent temperature measurement system
Authors:Song, Wei (1); Li, Dong-Jian (2); Xie, Wei (1); Zhang, Wen-Song (2); Kou, Xiao-Kuo (1)
Author affiliation:(1) Henan Electric Power Company, Zhengzhou, China; (2) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an, China
Corresponding author:Song, Wei
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:44
Issue:1
Issue date:January 1, 2015
Publication year:2015
Article number:0112003
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:To realize the non-contact temperature monitoring of high voltage electrical equipment, a non-contact (0~1.5 m) fluorescence fiber temperature measurement system was designed. Using the relation between fluorescence and temperature of rare earth materials, temperature measurement was achieved by measuring the excited fluorescence lifetime of the fluorescent material which was attached on the object. The analysis indicates that the received light energy can be increased through adding a converging lens and a converging cone. In the experiment, the fluorescence intensity curve was obtained, and the temperature was aquired according to the relation of fluorescence lifetime and the temperature of the measured object. The measurement error is less than 1 , ensuring its application in high-voltage environment. &copy;, 2015, Chinese Optical Society. All right reserved.
Number of references:13
Page count:5
Main heading:Temperature measurement
Controlled terms:Fibers - Fluorescence
Uncontrolled terms:Electric power equipments - Fluorescence intensities - Fluorescence lifetimes - High voltage electrical equipment - High voltage environments - Non contact temperatures - Remote - Temperature measurement systems
Classification code:741.1  Light/Optics - 812  Ceramics, Refractories and Glass - 817  Plastics and Other Polymers: Products and Applications - 944.6  Temperature Measurements
DOI:10.3788/gzxb20154401.0112003

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 131>

Accession number:20153901314710
Title:A fiber-optic temperature sensor based on dual fluorescence by using FIR method
Authors:Du, Xinchao (1, 2); Zhou, Libin (3); He, Zhengquan (1); Liu, Feng (1); Lin, Xiao (1, 2); Hu, Baowen (1); Guo, Xiaoyi (1); Luo, Baoke (1); Ren, Liyong (1); Li, Yulin (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; Shaanxi, China; (2) University of Chinese Academy of Sciences, Beijing, China; (3) Department of Physics, Northwest University, Xi'an; Shaanxi, China
Corresponding author:He, Zhengquan
Source title:Zhongguo Jiguang/Chinese Journal of Lasers
Abbreviated source title:Zhongguo Jiguang
Volume:42
Issue:8
Issue date:August 10, 2015
Publication year:2015
Article number:0805002
Language:English
ISSN:02587025
CODEN:ZHJIDO
Document type:Journal article (JA)
Publisher:Science Press
Abstract:A fiber-optic temperature sensor based on fluorescence intensity ratiometric (FIR) method is proposed and investigated experimentally. Plastic optical fibers are employed for transmitting the excitation light and collecting the Rhodamine B (RHB) and Rhodamine110 (RH110) fluorescence signals. Given that the fluorescence intensity of RHB is temperature-dependent while that of RH110 is temperature-independent, the temperature can be measured by calculating the fluorescence intensity ratio of these two dyes. To achieve a desired performance, the optimal integration ranges of fluorescence intensities of the two dyes are identified via considerable experimental tests. Indeed, a precise measurement is achieved in experiments. The feasible range of temperatures is from 25 to 60; a minimum rms temperature error of 0.38 and a sensitivity of 0.0134/ are achieved. Further, the proposed sensor is proved to be insensitive to fiber bending for bend radii exceeding 9 mm. Thus, the sensor can be used for in situ temperature monitoring. &copy;, 2015, Science Press. All right reserved.
Number of references:22
Page count:9
Main heading:Plastic optical fibers
Controlled terms:Fiber optic sensors - Fiber optics - Fibers - Fluorescence - Optical fibers - Temperature sensors
Uncontrolled terms:Fiber optic temperature sensor - Fluorescence intensities - Fluorescence intensity ratio - Precise measurements - Ratiometric - Spectral interval - Temperature dependent - Temperature independents
Classification code:732  Control Devices - 741.1  Light/Optics - 741.1.2  Fiber Optics - 812  Ceramics, Refractories and Glass - 817  Plastics and Other Polymers: Products and Applications
DOI:10.3788/CJL201542.0805002

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 132>

Accession number:20154601536936
Title:In situ optical measurements of Chang'E-3 landing site in Mare Imbrium: 2. Photometric properties of the regolith
Authors:Jin, Weidong (1); Zhang, Hao (1); Yuan, Ye (1); Yang, Yazhou (1); Shkuratov, Yuriy G. (2); Lucey, Paul G. (3); Kaydash, Vadim G. (2); Zhu, Meng-Hua (4); Xue, Bin (5); Di, Kaichang (6); Xu, Bin (6); Wan, Wenhui (6); Xiao, Long (1); Wang, Ziwei (1)
Author affiliation:(1) Planetary Science Institute, School of Earth Sciences, China University of Geosciences, Wuhan, China; (2) Astronomical Institute, Kharkov V.N. Karazin National University, Kharkov, Ukraine; (3) Hawaii Institute of Geophysics and Planetology, University of Hawaii, Honolulu; HI, United States; (4) Space Science Institute, Macau University of Science and Technology, Taipa, China; (5) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (6) State Key Laboratory of Remote Sensing Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing, China
Corresponding author:Zhang, Hao
Source title:Geophysical Research Letters
Abbreviated source title:Geophys. Res. Lett.
Volume:42
Issue:20
Issue date:October 28, 2015
Publication year:2015
Pages:8312-8319
Language:English
ISSN:00948276
E-ISSN:19448007
CODEN:GPRLAJ
Document type:Journal article (JA)
Publisher:Blackwell Publishing Ltd
Abstract:The panorama cameras onboard the Yutu Rover of the Chang'E-3 lunar mission acquired hundreds of high-resolution color images of the lunar surface and captured the first in situ lunar opposition effect (OE) since the Apollo era. We extracted the phase curve and the color ratio in three bands with the phase angle range from 2&deg; to 141&deg;. Photometric inversions using the Hapke model reveal that submicroscopic dusts are present in the landing area and both the coherent backscattering and the shadow hiding are responsible for the strong OE. Compared with spaceborne measurements, the grains in the landing site are brighter, more transparent, and appear to be better crystallized than the average maria basaltic grains. The results show that the phase-reddening effect appears to be present in the in situ phase curves. The current phase curve can be used as the ground-truth validations of any future spaceborne phase curve measurement over the landing site region. Key Points The first in situ lunar phase curve since the Apollo era covers phase angle range of 2-141&deg; Both shadow hiding and coherent backscattering contribute to the opposition surge Single-particle scattering has backward and forward scattering lobes and regolith porosity is obtained &copy; 2015. American Geophysical Union. All Rights Reserved.
Number of references:33
Main heading:Lunar missions
Controlled terms:Backscattering - Coherent scattering - Forward scattering - Landing - Lunar surface analysis - Moon - Optical data processing - Photometry - Remote sensing
Uncontrolled terms:Hapke model - Lunar regolith - Opposition effects - phase curve - Planetary remote sensing
Classification code:657.2  Extraterrestrial Physics and Stellar Phenomena - 711  Electromagnetic Waves - 723.2  Data Processing and Image Processing - 941.4  Optical Variables Measurements
DOI:10.1002/2015GL065789

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 133>

Accession number:20152801011031
Title:Research of vehicle detection algorithm in infrared thermal imaging videos
Authors:Li, Bin (1, 2); Wen, Desheng (1); Song, Zongxi (1); Shen, Chao (1, 2); Wu, Mengjie (1, 2); Li, Feipeng (1, 2)
Author affiliation:(1) Space Optics Laboratory, Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China
Corresponding author:Wen, Desheng
Source title:Journal of Information and Computational Science
Abbreviated source title:J. Inf. Comput. Sci.
Volume:12
Issue:9
Issue date:June 10, 2015
Publication year:2015
Pages:3357-3363
Language:English
ISSN:15487741
Document type:Journal article (JA)
Publisher:Binary Information Press
Abstract:This paper proposes a new algorithm for counting vehicle information in the infrared thermal imaging video sequences. First, the characteristics of the adjacent frames in video sequences has been analyzed, together with the modeling for the background information and updating background model according to the inter-frame variation. Second, the information of the moving target in the current frame is preliminarily extracted adopting the background subtraction algorithm, it achieves image segmentation and the division of the best detection area according to the imaging features of vehicles in different lanes by using morphological filtering and setting up the detection window. Then, model classification is done using the connected domain tags and template matching for vehicles in detection region. Finally, vehicle information each frame detects is counted by lanes. The experimental results present that the algorithm for dividing the best detection region segmentation image can reduce the miss rate and the false detection rate to the maximum extent. Meanwhile, the algorithm also has good detection accuracy for statistics of the traffic flow and classification of vehicles in video sequences. &copy;, 2015, Journal of Information and Computational Science. All right reserved.
Number of references:8
Main heading:Signal detection
Controlled terms:Algorithms - Automobile frames - Image matching - Image segmentation - Information filtering - Infrared imaging - Object detection - Template matching - Vehicles - Video recording
Uncontrolled terms:Background information - Background subtraction algorithms - Infrared thermal imaging - Model classification - Morphological filtering - Region segmentation - Vehicle detection - Vehicle recognition
Classification code:662.4  Automobile and Smaller Vehicle Components - 716.1  Information Theory and Signal Processing - 716.4  Television Systems and Equipment - 723  Computer Software, Data Handling and Applications - 723.2  Data Processing and Image Processing - 746  Imaging Techniques - 903.1  Information Sources and Analysis
DOI:10.12733/jics20105946

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 134>

Accession number:20155201719010
Title:The design of nanosecond high-voltage ultra wide band bipolar pulse generator
Authors:Shi, Jincheng (1, 2); Liu, Baiyu (1); Gou, Yongsheng (1)
Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9674
Monograph title:AOPC 2015: Optical and Optoelectronic Sensing and Imaging Technology
Issue date:2015
Publication year:2015
Article number:967427
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628418996
Document type:Conference article (CA)
Conference name:Applied Optics and Photonics, China: Optical and Optoelectronic Sensing and Imaging Technology, AOPC 2015
Conference date:May 5, 2015  -  May 7, 2015
Conference location:Beijing, China
Conference code:117013
Sponsor:Chinese Society for Optical Engineering
Publisher:SPIE
Abstract:The design of nanosecond high-voltage ultra wide band bipolar pulse generator is shown in this paper. By analyzing the principle of the avalanche diode and doing the research of the related circuit acting on the pulse, this generator can generate a nanosecond high-voltage ultra wide band bipolar pulse, which its peak-to-peak voltage is about 400V and the pulse time width is 2ns. The experimental results showed a good agreement with the simulation results. A negative unipolar high-voltage pulse, having a fast falling-edge and a slowly exponential rising-edge, was firstly generated by the MARX circuit consist of the avalanche diodes. Then the use of the high speed avalanche diode could generate a negative unipolar high-voltage narrow Gaussian pulse, having a fast falling-edge and a fast rising-edge. In an attempt to cancel the reflection of the pulse made by the impedance mismatch, the circuit introduced the capacitor(C) and inductor(L) by calculating. Eventually a nanosecond high-voltage ultra wide band bipolar pulse could be got after going through the differentiator consist of introducing the right resistance, capacitance and inductance by calculation and experiment, and a filter with 2GHz bandwidth makes the bipolar smooth and perfect. &copy; 2015 SPIE.
Number of references:5
Main heading:Pulse generators
Controlled terms:Avalanche diodes - Capacitance - Imaging techniques - Ultra-wideband (UWB)
Uncontrolled terms:Bipolar pulse - Differentiators - Gaussian pulse - High voltage pulse - Impedance mismatch - Marx circuits - Nanosecond pulse - Peak-to-peak voltages
Classification code:701.1  Electricity: Basic Concepts and Phenomena - 713.4  Pulse Circuits - 714.1  Electron Tubes - 716.3  Radio Systems and Equipment - 746  Imaging Techniques
DOI:10.1117/12.2199899

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 135>

Accession number:20154701591517
Title:Simultaneous pose and correspondence estimation based on genetic algorithm
Authors:Yang, Haiwei (1); Wang, Fei (1); Li, Zhe (2); Dong, Hang (1)
Author affiliation:(1) Xi'An Jiaotong University, No. 28 Xianning West Road, Xi'an; Shaanxi, China; (2) Xi'An Institute of Optics and Precision Mechanics, CAS, Xi'an; Shaanxi, China
Corresponding author:Wang, Fei(wfx@mail.xjtu.edu.cn)
Source title:International Journal of Distributed Sensor Networks
Abbreviated source title:Int. J. Distrib. Sens. Netw.
Volume:2015
Issue date:2015
Publication year:2015
Article number:828241
Language:English
ISSN:15501329
E-ISSN:15501477
Document type:Journal article (JA)
Publisher:Hindawi Publishing Corporation, 410 Park Avenue, 15th Floor, 287 pmb, New York, NY 10022, United States
Abstract:Although several algorithms have been presented to solve the simultaneous pose and correspondence estimation problem, the correct solution may not be reached to with the traditional random-start initialization method. In this paper, we derive a novel method which estimates the initial value based on genetic algorithm, considering the influences of different initial guesses comprehensively. First, a set of random initial guesses is generated as candidate solutions. Second, the assignment matrix and the perspective projection error are computed for each candidate solution. And then each individual is modified (selection, crossover, and mutation) in current iterative process. Finally, the fittest individual is stochastically selected from the final population. With the presented initialization method, the proper initial guess could be first calculated and then the simultaneous pose and correspondence estimation problem could be solved easily. Simulation results with synthetic data and experiments on real images prove the effectiveness and robustness of our proposed method. &copy; 2015 Haiwei Yang et al.
Number of references:27
Main heading:Iterative methods
Controlled terms:Algorithms - Genetic algorithms
Uncontrolled terms:Correct solution - Correspondence estimations - Initial guess - Initialization methods - Iterative process - Perspective projections - Real images - Synthetic data
Classification code:921.6  Numerical Methods
DOI:10.1155/2015/828241

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 136>

Accession number:20152600969173
Title:High power diode laser stack development using gold-tin bonding technology
Authors:Hou, Dong (1); Wang, Jingwei (1); Zhang, Pu (2); Cai, Lei (1); Dai, Ye (1); Li, Yingjie (1); Liu, Xingsheng (1)
Author affiliation:(1) Focuslight Technologies Co. LTD, Xi'an, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, 17 Xinxi Road, Xi'an, Shaanxi, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9346
Volume title:Components and Packaging for Laser Systems
Part number:1 of 1
Issue date:2015
Publication year:2015
Article number:934604
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628414363
Document type:Conference article (CA)
Conference name:Components and Packaging for Laser Systems
Conference date:February 9, 2015  -  February 12, 2015
Conference location:San Francisco, CA, United states
Conference code:112114
Sponsor:The Society of Photo-Optical Instrumentation Engineers (SPIE)
Publisher:SPIE
Abstract:High power diode lasers have increased application in many fields. In this work, a sophisticated high power and high performance conduction cooled diode laser stack has been developed for long pulse duration and high duty cycle using gold-tin (AuSn) bonding technology. The transient thermal behavior and optical simulation of the laser diode stack module are investigated to optimize the laser device structure. CTE-matched submount and AuSn hard solder are used for bonding the laser diode bar to achieve higher reliability and longer lifetime. Guided by the numerical simulation and analytical results, conduction cooled diode laser stack with high power, long pulse duration and high duty cycle is fabricated and characterized. Compared with the conventional indium bonding technology, the new design is a promising approach to obtain improved performance with high reliability and long lifetime. &copy; 2015 SPIE.
Number of references:10
Main heading:Semiconductor lasers
Controlled terms:Diodes - Gold - Gold alloys - Laser beam welding - Tin - Tin alloys
Uncontrolled terms:Analytical results - Bonding technology - Diode laser stack - Hard Solde - High power diode laser - High-performance conduction - Long pulse durations - Optical simulation
Classification code:546.2  Tin and Alloys - 547.1  Precious Metals - 714.2  Semiconductor Devices and Integrated Circuits - 744.9  Laser Applications
DOI:10.1117/12.2079610

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 137>

Accession number:20154701600843
Title:Tubular depressed cladding waveguide laser realized in Yb: YAG by direct inscription of femtosecond laser
Authors:Tang, Wenlong (1, 2); Zhang, Wenfu (1); Liu, Xin (1, 2); Liu, Shuang (1, 2); Stoian, Razvan (3); Cheng, Guanghua (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China; (3) Laboratoire Hubert Curien, UMR 5516 CNRS, Universit&eacute; de Lyon, Universit&eacute; Jean Monnet, Saint Etienne, France
Source title:Journal of Optics (United Kingdom)
Abbreviated source title:J. Opt.
Volume:17
Issue:10
Issue date:September 4, 2015
Publication year:2015
Article number:105803
Language:English
ISSN:20408978
E-ISSN:20408986
Document type:Journal article (JA)
Publisher:Institute of Physics Publishing
Abstract:We report on the fabrication of tubular depressed cladding waveguides in single crystalline Yb:YAG by the direct femtosecond laser writing technique. Full control over the confined light spatial distribution is demonstrated by the photoinscription of high index contrast waveguides with tubular configuration. Under optical pumping, highly efficient laser oscillation in depressed cladding waveguide at 1030 nm is demonstrated. The maximum output power obtained is 68 mW with a slope efficiency of 35% for an outcoupling transmission of 50%. A slope efficiency as high as 44% is realized when the coupling output ratio is 91% and a low lasing threshold of 70 mW is achieved with the output coupling mirror of 10%. &copy; 2015 IOP Publishing Ltd.
Number of references:36
Main heading:Laser materials processing
Controlled terms:Efficiency - Laser mirrors - Optical pumping - Optical waveguides - Pumping (laser) - Ultrashort pulses - Waveguides - Ytterbium
Uncontrolled terms:Depressed cladding - Femtosecond laser writing - High-index contrast waveguides - Integrated optics devices - Laser oscillations - Maximum output power - Single-crystalline - Slope efficiencies
Classification code:547.2  Rare Earth Metals - 714.3  Waveguides - 744  Lasers - 913.1  Production Engineering
DOI:10.1088/2040-8978/17/10/105803

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 138>

Accession number:20160701940298
Title:WS<inf>2</inf>/fluorine mica (FM) saturable absorbers for all-normal-dispersion mode-locked fiber laser
Authors:Li, Lu (1, 3); Jiang, Shouzhen (2); Wang, Yonggang (1); Wang, Xi (1); Duan, Lina (1); Mao, Dong (4); Li, Zhen (2); Man, Baoyuan (2); Si, Jinhai (3)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences (CAS), Xi'an, China; (2) School of Physics and Electronics, Shandong Normal University, Jinan, China; (3) Key Laboratory for Physical Electronics and Devices, Ministry of Education, Shaanxi Key Lab. of Information Photonic Technique, School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an, China; (4) Key Laboratory of Space Applied Physics and Chemistry, Ministry of Education, Shaanxi Key Laboratory of Optical Information Technology, School of Science, Northwestern Polytechnical University, Xi'an, China
Source title:Optics Express
Abbreviated source title:Opt. Express
Volume:23
Issue:22
Issue date:November 2, 2015
Publication year:2015
Pages:28698-28706
Language:English
E-ISSN:10944087
Document type:Journal article (JA)
Publisher:OSA - The Optical Society
Abstract:The report firstly propose a new WS<inf>2</inf>absorber based on fluorine mica (FM) substrate. The WS<inf>2</inf>material was fabricated by thermal decomposition method. The FM was stripped into one single layer as thin as 20 &mu;m and deposited WS<inf>2</inf>on it, which can be attached to the fiber flank without causing the laser deviation. Similar to quartz, the transmission rate of FM is as high as 90% at near infrared wavelength from one to two micrometers. Furthermore, FM is a highly elastic material so that it is not easy to break off even its thickness was only 20 &mu;m. On the contrary, quartz is hard to be processed and easy to break off when its thickness is less than 100 &mu;m. Compared to organic matrix such as polyvinyl alcohol (PVA), FM has higher softening temperature, heat dissipation and laser damage threshold than those of organic composites. In our work, the modulation depth (MD) and non-saturable losses (NLs) of this kind of saturable absorber were measured to be 5.8% and 14.8%, respectively. The WS<inf>2</inf>/FM absorber has a high damage threshold of 406 MW/cm<sup>2</sup>, two times higher than that of WS<inf>2</inf>/PVA. By incorporating the saturable absorber into Yb-doped fiber laser cavity, a mode-locked fiber laser was achieved with central wavelength of 1052.45 nm. The repetition rate was 23.26 MHz and the maximum average output power was 30 mW. The long term stability of working was proved to be good too. The results indicate that WS<inf>2</inf>/FM film is a practical nonlinear optical material for photonic applications. &copy;2015 Optical Society of America.
Number of references:37
Main heading:Mode-locked fiber lasers
Controlled terms:Decomposition - Dispersions - Fiber lasers - Fibers - Infrared devices - Laser damage - Locks (fasteners) - Mica - Optical materials - Organic lasers  - Quartz - Saturable absorbers - Semiconductor quantum wells - Silicate minerals
Uncontrolled terms:All normal dispersions - Laser damage threshold - Near-infrared wavelength - Non-linear optical material - Photonic application - Poly (vinyl alcohol) (PVA) - Softening temperature - Thermal decomposition methods
Classification code:482.2  Minerals - 714.2  Semiconductor Devices and Integrated Circuits - 741.3  Optical Devices and Systems - 744  Lasers - 802.2  Chemical Reactions - 951  Materials Science
DOI:10.1364/OE.23.028698

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 139>

Accession number:20153601247445
Title:Hydrothermal synthesis of TiO<inf>2</inf>nanostructure films and their photoelectrochemical properties
Authors:Miao, Hui (1, 2); Hu, Xiaoyun (1, 2); Fan, Jun (3); Li, Chaoben (1); Sun, Qian (1); Hao, Yuanyuan (1); Zhang, Guowei (1); Bai, Jintao (1, 2); Hou, Xun (1, 2, 4)
Author affiliation:(1) School of Physics, Northwest University, Xi'an, China; (2) National Photoelectric Technology and Functional Materials, Application of Science and Technology International Cooperation Base, Northwest University, Xi'an, China; (3) Xi'an, China; (4) State Key Laboratory of Transient Optics and Technology, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
Corresponding author:Miao, Hui
Source title:Applied Surface Science
Abbreviated source title:Appl Surf Sci
Volume:358
Issue date:December 15, 2015
Publication year:2015
Pages:418-424
Language:English
ISSN:01694332
CODEN:ASUSEE
Document type:Conference article (CA)
Publisher:Elsevier
Abstract:In this study, anatase TiO<inf>2</inf>nanostructured films were successfully prepared via Ti foil-assisted hydrothermal synthesis method without any surfactants. With the increase of hydrothermal time from 3 to 12 h, the surface morphologies of the films changed from nanotubes to nanoflowers and the thickness of the films increased from 2.5 to 4.2 &mu;m. The nanoflowers were seated on a layer of oriented nanotubes and consisted of nanosheets. Both nanotubes and nanosheets were multi-walled, comprising interconnected [TiO<inf>6</inf>] octahedra. Ti foil and acid-treated Ti foil both formed pieces of thin films on the surface with nanotubes and nanoflowers, respectively. Photoelectrochemistry tests showed that the photocurrent response of the nanotube film was nearly 13.8 &mu;A/cm<sup>2</sup>, which was approximately three times higher than that of nanoflowers film. This indicates that the nanotubes more successfully transferred electrons to the surface of the film as a result of nanotubes providing direct pathways for electrons from the point of injection to the Ti foil electrode. The ultraviolet (UV)-visible-near infrared (NIR) absorption spectra indicated that the nanotube film had a narrower band gap as compared to the nanoflower film. In other words, a relatively low hydrothermal treatment temperature or relatively short hydrothermal treatment time is better for preparing excellent photocurrent response films. &copy; 2015 Elsevier B.V. All rights reserved.
Number of references:32
Main heading:Hydrothermal synthesis
Controlled terms:Electrochemistry - Energy gap - Films - Infrared devices - Nanoflowers - Nanosheets - Nanostructures - Nanotubes - Thin films - Yarn
Uncontrolled terms:Hydrothermal treatments - Nanostructured Films - Photo-electrochemistry - Photocurrent response - Photoelectrochemical properties - Thickness of the film - TiO - Visible near-infrared
DOI:10.1016/j.apsusc.2015.08.212

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 140>

Accession number:20154301432902
Title:Effect of energy density and feeding speed on micro-holes drilling in SiC/SiC composites by picosecond laser
Authors:Liu, Yongsheng (1); Wang, Jing (1); Li, Weinan (2); Wang, Chunhui (1); Zhang, Qing (1); Yang, Xiaojun (2); Cheng, Laifei (1)
Author affiliation:(1) Science and Technology on Thermostructure Composite Materials Laboratory, Northwestern Polytechnical University, Xi&rsquo;an; Shaanxi, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi&rsquo;an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi&rsquo;an; Shaanxi, China
Corresponding author:Liu, Yongsheng
Source title:International Journal of Advanced Manufacturing Technology
Abbreviated source title:Int J Adv Manuf Technol
Issue date:September 23, 2015
Publication year:2015
Language:English
ISSN:02683768
E-ISSN:14333015
CODEN:IJATEA
Document type:Article in Press
Publisher:Springer-Verlag London Ltd
Abstract:Picosecond laser machining is an important modern technology for materials with high hardness. In this paper, micro-holes with several hundred micrometer diameter were drilled in SiC/SiC composite using picosecond laser, and the quality of the micro-holes under different machining parameters was investigated in detail. The results indicated that energy density and feeding speed had remarkable effect on the micro-hole quality. The roundness of the micro-holes on the laser entry side was rarely affected by energy density and feeding speed. However, the roundness of the micro-holes on the laser exit side and micro-hole diameters along processing direction were quite sensitive to the energy density and feeding speed. Feeding speed had little influence on the quality of drilling holes, except for more debris on the entry side with 11.2 &mu;m/s feeding speed. &copy; 2015 Springer-Verlag London
Page count:9
Main heading:Feeding
Controlled terms:Silicon carbide - Speed
Uncontrolled terms:Drilling holes - Energy density - Feeding speed - High hardness - Machining parameters - Modern technologies - Picosecond laser - SiC/SiC composites
Classification code:691.2  Materials Handling Methods - 804.2  Inorganic Compounds
DOI:10.1007/s00170-015-7844-1

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 141>

Accession number:20151100635589
Title:A circuit used for peak power detecting of the laser pulse
Authors:Gou, Yongsheng (1); Liu, Baiyu (1); Bai, Yonglin (1); Wang, Bo (1); Zhu, Bingli (1); Bai, Xiaohong (1); Qin, Junjun (1); Xu, Peng (2)
Author affiliation:(1) Defense Key Laboratory of Ultra-fast Diagnostics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an, China; (2) China Graduate School of the Chinese Academy of Sciences, Beijing, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9449
Volume title:International Conference on Photonics and Optical Engineering, icPOE 2014
Part number:1 of 1
Issue date:2015
Publication year:2015
Article number:94492O
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628415650
Document type:Conference article (CA)
Conference name:International Conference on Photonics and Optical Engineering, icPOE 2014
Conference date:October 13, 2014  -  October 15, 2014
Conference location:Xi'an, China
Conference code:111356
Sponsor:Optics and Photonics Society of Singapore; Shaanxi Optical Society; Shaanxi Provincial Physical Society
Publisher:SPIE
Abstract:Based on the principle of capacitor pre-charging, an analog pulse stretch circuit is designed for detecting peak power of narrow laser impulse. Experimental test were carried out. And it could achieve regulation accuracy of 5ps, jitter&lt;600ps. Due to the need of different delay ranges during the practical applications, the analog pulse stretch circuit is optimized. It doesn&trade;t only meet the different adjustment ranges, but also maintains high regulation accuracy. &copy; 2015 SPIE.
Number of references:9
Main heading:Analog circuits
Controlled terms:Capacitors - Photonics
Uncontrolled terms:Experimental test - Laser impulse - Peak power
Classification code:704.1  Electric Components - 712  Electronic and Thermionic Materials - 713  Electronic Circuits - 717  Optical Communication - 744  Lasers
DOI:10.1117/12.2075496

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 142>

Accession number:20160902035861
Title:Aircraft sensor failure diagnosis using self-organizing fuzzy systems
Authors:Rong, Hai-Jun (1); Bai, Jian-Ming (2); Yang, Jing (3)
Author affiliation:(1) State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace, Xi'An Jiaotong University, Xi'an, Shaanxi, China; (2) Optical Direction and Pointing, Technique Research Department, Xi'An Institute of Optics and Precision Mechanics of CAS, Xi'an, Shaanxi, China; (3) Institute of Control Engineering, School of Electronic and Information Engineering, Xi'An Jiaotong University, Xi'an, Shaanxi, China
Source title:IEEE International Conference on Fuzzy Systems
Abbreviated source title:IEEE Int Conf Fuzzy Syst
Volume:2015-November
Monograph title:FUZZ-IEEE 2015 - IEEE International Conference on Fuzzy Systems
Issue date:November 25, 2015
Publication year:2015
Article number:7338106
Language:English
ISSN:10987584
CODEN:PIFSFZ
ISBN-13:9781467374286
Document type:Conference article (CA)
Conference name:IEEE International Conference on Fuzzy Systems, FUZZ-IEEE 2015
Conference date:August 2, 2015  -  August 5, 2015
Conference location:Istanbul, Turkey
Conference code:118450
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:A novel scheme for diagnosing sensor failures in a flight control system is presented. In the proposed scheme, a set of self-organizing fuzzy systems named as SAFISs are applied as the online approximators for recognizing the sensor outputs in order to determine the failure detection, identification and accommodation (FDIA). SAFIS is an online learning fuzzy system with concurrent structure and parameter learning. The rules of the SAFIS are added or deleted based on the input data without predefining them by trial and error. The efficiency of the proposed scheme is demonstrated by simulation examples where soft failures in the angular rate gyros are successfully diagnosed. &copy; 2015 IEEE.
Number of references:13
Main heading:Online systems
Controlled terms:Failure analysis - Flight control systems - Fuzzy systems
Uncontrolled terms:Aircraft sensors - Failure Diagnosis - Identification and accommodation - Parameter learning - SAFIS - Self-Organizing - Self-organizing fuzzy - Simulation example
Classification code:652.3  Aircraft Instruments and Equipment - 722.4  Digital Computers and Systems - 961  Systems Science
DOI:10.1109/FUZZ-IEEE.2015.7338106

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 143>

Accession number:20154701561388
Title:A Robust Gradient-Based Algorithm to Correct Bias Fields of Brain MR Images
Authors:Ling, Qiang (1); Li, Zhaohui (1); Huang, Qinghua (2); Li, Xuelong (3)
Author affiliation:(1) Department of Automation, University of Science and Technology of China, Hefei; Anhui, China; (2) School of Electronic and Information Engineering, South China University of Technology, Guangzhou, China; (3) Center for OPTical IMagery Analysis and Learning (OPTIMAL), State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; Shaanxi, China
Corresponding author:Ling, Qiang(qling@ustc.edu.cn)
Source title:IEEE Transactions on Autonomous Mental Development
Abbreviated source title:IEEE Trans. Auton. Mental Dev.
Volume:7
Issue:3
Issue date:September 2015
Publication year:2015
Pages:256-264
Article number:7070761
Language:English
ISSN:19430604
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:We developed a novel algorithm to estimate bias fields from brain magnetic resonance (MR) images using a gradient-based method. The bias field is modeled as a multiplicative and slowly varying surface. We fit the bias field by a low-order polynomial. The polynomial's parameters are directly obtained by minimizing the sum of square errors between the gradients of MR images (both in the x-direction and y-direction) and the partial derivatives of the desired polynomial in the log domain. Compared to the existing retrospective algorithms, our algorithm combines the estimation of the gradient of the bias field and the reintegration of the obtained gradient polynomial together so that it is more robust against noise and can achieve better performance, which are demonstrated through experiments with both real and simulated brain MR images. &copy; 2009-2011 IEEE.
Number of references:20
Main heading:Algorithms
Controlled terms:Blogs - Estimation - Magnetic resonance - Magnetic resonance imaging - Mathematical models - Polynomials
Uncontrolled terms:Gradient based algorithm - Gradient-based method - Low-order polynomials - Noise - Nonhomogeneous media - Novel algorithm - Partial derivatives - Sum of square errors
Classification code:701.2  Magnetism: Basic Concepts and Phenomena - 723  Computer Software, Data Handling and Applications - 921  Mathematics - 921.1  Algebra
DOI:10.1109/TAMD.2015.2416976

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 144>

Accession number:20151100635527
Title:Decoding algorithms and spatial resolution Monte Carlo simulation of cross strip anode for UV astronomy
Authors:Deng, Guobao (1, 2); Zhu, Xiangping (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) Graduate University of Chinese Academy of Sciences, Beijing, China
Corresponding author:Deng, Guobao
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9449
Volume title:International Conference on Photonics and Optical Engineering, icPOE 2014
Part number:1 of 1
Issue date:2015
Publication year:2015
Article number:94490E
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628415650
Document type:Conference article (CA)
Conference name:International Conference on Photonics and Optical Engineering, icPOE 2014
Conference date:October 13, 2014  -  October 15, 2014
Conference location:Xi'an, China
Conference code:111356
Sponsor:Optics and Photonics Society of Singapore; Shaanxi Optical Society; Shaanxi Provincial Physical Society
Publisher:SPIE
Abstract:The development decoding algorithms of two-dimensional cross strip anodes image readouts for applications in UV astronomy are described. We present results with Monte Carlo simulation by GEANT4 toolkit, the results show that when the cross strip anode period is 0.5mm and the electrode width is 0.4mm, the spatial resolution accuracy is sufficient to reach better than 5 &mu;m, the temporal resolution accuracy of the event detection can be as low as 100 ps. The influences of the cross strip detector parameters, such as the anode period, the width of anode fingers (electrode), the width of the charge footprint at the anode (determined by the distance and the field between the MCP and the anode), the gain of the MCP and equivalent noise charge (ENC) are also discussed. The development decoding algorithms and simulation results can be useful for the designing and performance improvement of future photon counting imaging detectors for UV Astronomy. &copy; 2015 SPIE.
Number of references:12
Main heading:Monte Carlo methods
Controlled terms:Algorithms - Astronomy - Decoding - Electrodes - Image resolution - Image storage tubes - Intelligent systems - Photonics
Uncontrolled terms:Cross-strip - Decoding algorithm - Equivalent noise charges - GEANT4 - Microchannel plate detector - Photon-counting imaging - Spatial resolution - Temporal resolution
Classification code:657.2  Extraterrestrial Physics and Stellar Phenomena - 712  Electronic and Thermionic Materials - 714.1  Electron Tubes - 717  Optical Communication - 723  Computer Software, Data Handling and Applications - 741  Light, Optics and Optical Devices - 742  Cameras and Photography - 744  Lasers - 921  Mathematics - 922.2  Mathematical Statistics
DOI:10.1117/12.2075999

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 145>

Accession number:20154201388175
Title:Tracking Human Pose Using Max-Margin Markov Models
Authors:Zhao, Lin (1); Gao, Xinbo (2); Tao, Dacheng (3); Li, Xuelong (4)
Author affiliation:(1) School of Electronic Engineering, Xidian University, Xi'an, China; (2) State Key Laboratory of Integrated Services Networks, School of Electronic Engineering, Xidian University, Xi'an, China; (3) Centre for Quantum Computation and Intelligent Systems, Faculty of Engineering and Information Technology, University of Technology, Sydney, 81 Broadway Street, Ultimo; NSW, Australia; (4) Center for OPTical IMagery Analysis and Learning (OPTIMAL), State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, Shaanxi, China
Source title:IEEE Transactions on Image Processing
Abbreviated source title:IEEE Trans Image Process
Volume:24
Issue:12
Issue date:December 1, 2015
Publication year:2015
Pages:5274-5287
Article number:7226826
Language:English
ISSN:10577149
CODEN:IIPRE4
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:We present a new method for tracking human pose by employing max-margin Markov models. Representing a human body by part-based models, such as pictorial structure, the problem of pose tracking can be modeled by a discrete Markov random field. Considering max-margin Markov networks provide an efficient way to deal with both structured data and strong generalization guarantees, it is thus natural to learn the model parameters using the max-margin technique. Since tracking human pose needs to couple limbs in adjacent frames, the model will introduce loops and will be intractable for learning and inference. Previous work has resorted to pose estimation methods, which discard temporal information by parsing frames individually. Alternatively, approximate inference strategies have been used, which can overfit to statistics of a particular data set. Thus, the performance and generalization of these methods are limited. In this paper, we approximate the full model by introducing an ensemble of two tree-structured sub-models, Markov networks for spatial parsing and Markov chains for temporal parsing. Both models can be trained jointly using the max-margin technique, and an iterative parsing process is proposed to achieve the ensemble inference. We apply our model on three challengeable data sets, which contains highly varied and articulated poses. Comprehensive experimental results demonstrate the superior performance of our method over the state-of-the-art approaches. &copy; 2015 IEEE.
Number of references:60
Main heading:Gesture recognition
Controlled terms:Iterative methods - Markov processes - Motion estimation
Uncontrolled terms:Approximate inference - articulated shapes - Markov Random Fields - max-margin - Pose estimation - Pose tracking - State-of-the-art approach - Temporal information
Classification code:921.6  Numerical Methods - 922.1  Probability Theory
DOI:10.1109/TIP.2015.2473662

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 146>

Accession number:20150800544786
Title:Multi-spectral pedestrian detection
Authors:Yuan, Yuan (1); Lu, Xiaoqiang (1); Chen, Xiao (1)
Author affiliation:(1) Center for OPTical IMagery Analysis and Learning (OPTIMAL), State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xian, Shaanxi, China
Corresponding author:Lu, Xiaoqiang
Source title:Signal Processing
Abbreviated source title:Signal Process
Volume:110
Issue date:May 2015
Publication year:2015
Pages:94-100
Language:English
ISSN:01651684
CODEN:SPRODR
Document type:Journal article (JA)
Publisher:Elsevier
Abstract:Pedestrian detection is a crucial problem in human pose recovery and behavior analysis, especially in applications such as visual surveillance, robotics, and drive-assistance systems. Recently, most pedestrian detection approaches of machine learning and signal processing have achieved advanced performance in traditional natural images. However, there exists a limitation on the accuracy in pedestrian detection. The reason behind this is that supporting information for detecting pedestrian is limited. In fact, spectrum besides visible light can provide abundant discriminative information for pedestrian detection. Therefore, it is significative to exploit multi-spectral information for detection task. In this paper, a multi-spectral based pedestrian detection approach is proposed, which not only takes use of the information of red, green and blue (RGB) bands, but also incorporates the information of near-infrared spectrum into the detection process. Latent variable support vector machines (L-SVM) are employed to train the multi-spectral pedestrian detection model. Experiments are implemented on a new dataset containing 1826 multi-spectral image pairs. The experimental results illustrate that utilizing multi-spectral information achieves significant performance improvement in a pedestrian detection task compared with only using RGB information. &copy; 2014 Elsevier B.V.
Number of references:32
Main heading:Information use
Controlled terms:Artificial intelligence - Behavioral research - Infrared devices - Learning systems - Near infrared spectroscopy - Signal processing - Spectroscopy - Support vector machines
Uncontrolled terms:Human behavior analysis - Latent - Multi-spectral - Near Infrared - Pedestrian detection - SVM
Classification code:716.1  Information Theory and Signal Processing - 723  Computer Software, Data Handling and Applications - 723.4  Artificial Intelligence - 741.3  Optical Devices and Systems - 801  Chemistry - 903.3  Information Retrieval and Use - 971  Social Sciences
DOI:10.1016/j.sigpro.2014.08.003

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 147>

Accession number:20153501219024
Title:Single-walled carbon nanotube solution-based saturable absorbers for mode-locked fiber laser
Authors:Li, Lu (1, 2, 3); Wang, Yonggang (1); Sun, Hang (1, 3); Duan, Lina (1, 3); Wang, Xi (1, 3); Si, Jinhai (2)
Author affiliation:(1) Chinese Academy of Sciences, Xi'An Institute of Optics and Precision Mechanics (XIOPM), State Key Laboratory of Transient Optics and Photonics, Xinxi-road 17, Xi'an, China; (2) Xi'An Jiaotong University, Key Lab. for Phys. Electronics and Devices of the Min. of Educ., School of Electronic and Information Engineering, Xianning-xilu 28, Xi'an, China; (3) University of Chinese Academy of Sciences, Beijing, China
Corresponding author:Wang, Yonggang
Source title:Optical Engineering
Abbreviated source title:Opt Eng
Volume:54
Issue:8
Issue date:August 1, 2015
Publication year:2015
Article number:86103
Language:English
ISSN:00913286
E-ISSN:15602303
CODEN:OPEGAR
Document type:Journal article (JA)
Publisher:SPIE
Abstract:The report proposed a saturable absorber based on a D-shaped fiber embedded in a single-walled carbon nanotube solution. Such a saturable absorber solution method with a D-shaped fiber has the virtues of good antioxidant capacity, excellent scattering resistance, high heat dissipation, and high damage threshold. The nonsaturable loss of this kind of saturable absorber was evaluated to be 3%. To the best of our knowledge, this is the lowest value compared with other carbon nanotube saturable absorbers. By incorporating the saturable absorber into a Yb-doped fiber laser cavity, a mode-locked fiber laser was achieved with a central wavelength of 1054.16 nm. The repetition rate was 23 MHz with a signal-to-noise ratio of 60 dB, and the pulse duration was measured to be 194 ps. The long-term working stability of working is also good. The results indicated that the solution method with a D-shaped fiber possesses a potential for fiber laser stability applications. &copy; 2015 Society of Photo-Optical Instrumentation Engineers (SPIE).
Number of references:29
Main heading:Mode-locked fiber lasers
Controlled terms:Fiber lasers - Fibers - Heat resistance - Locks (fasteners) - Pulse repetition rate - Saturable absorbers - Semiconductor quantum wells - Signal to noise ratio - Single-walled carbon nanotubes (SWCN) - Yarn
Uncontrolled terms:Antioxidant capacity - Central wavelength - Damage threshold - Non-saturable loss - Pulse durations - Solution methods - Working stabilities - Yb doped fiber laser
Classification code:601.3  Mechanisms - 714.2  Semiconductor Devices and Integrated Circuits - 716.1  Information Theory and Signal Processing - 744.1  Lasers, General - 744.4  Solid State Lasers - 761  Nanotechnology - 819.4  Fiber Products - 931.2  Physical Properties of Gases, Liquids and Solids
DOI:10.1117/1.OE.54.8.086103

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 148>

Accession number:20154601555839
Title:Interval-valued intuitionistic fuzzy prioritized hybrid weighted aggregation operator and its application in decision making
Authors:Wu, Hua (1, 2); Su, Xiuqin (1)
Author affiliation:(1) Key Laboratory of Ultrafast Photoelectric Diagnostics Technology, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, 17 Xinxi Road, Xi'an, Shaanxi, China; (2) University of Chinese, Academy of Sciences, Beijing, China
Corresponding author:Wu, Hua(sunshinesmilewh@gmail.com)
Source title:Journal of Intelligent and Fuzzy Systems
Abbreviated source title:J. Intelligent Fuzzy Syst.
Volume:29
Issue:4
Issue date:October 23, 2015
Publication year:2015
Pages:1697-1709
Language:English
ISSN:10641246
E-ISSN:18758967
Document type:Journal article (JA)
Publisher:IOS Press, Nieuwe Hemweg 6B, Amsterdam, 1013 BG, Netherlands
Abstract:Interval-valued intuitionistic fuzzy numbers (IVIFNs) are usually utilized in multi-attribute decision making problems, providing an accurate description of incomplete and uncertain information. The existing IVIFN-based works mainly focus on either the prioritization relationship of attributes or both the importance and the ordered position of them. However, these aspects of attributes are all important in practical use and they should be simultaneously considered. To this end, this paper proposes an interval-valued intuitionistic fuzzy prioritized hybrid weighted aggregation (IVIF-PHWA) operator. The contribution of this paper is threefold: 1) A unit prioritized hybrid weighted aggregation (UPHWA) operator is proposed, which considers the prioritization relationship, the importance and the ordered position of attributes. 2) TheUPHWAoperator is extended into IVIF-PHWAoperator, whose properties are all investigated. These properties illustrate that the IVIF-PHWA operator can better deal with the incomplete and imprecise information. 3) This work develops an IVIF-PHWA operator-based multi-attribute decision making method to solve the decision making problems in IVIF environment. Finally, a practical example is provided to validate the efficiency and effectiveness of the proposed approach. &copy; 2015-IOS Press and the authors.
Number of references:45
Main heading:Decision making
Controlled terms:Fuzzy sets - Mathematical operators
Uncontrolled terms:Aggregation operator - Decision-making problem - Interval-valued intuitionistic fuzzy number - Interval-valued intuitionistic fuzzy sets - Multi attribute decision making - Multi attribute decision making methods - Prioritization relationships - Uncertain informations
Classification code:912.2  Management
DOI:10.3233/IFS-151647

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 149>

Accession number:20150200417406
Title:Mining Spatialoral Patterns and Structural Sparsity for Human Motion Data Denoising
Authors:Feng, Yinfu (1); Ji, Mingming (1); Xiao, Jun (1); Yang, Xiaosong (2); Zhang, Jian J. (2); Zhuang, Yueting (1); Li, Xuelong (3)
Author affiliation:(1) College of Computer Science, Zhejiang University, Hangzhou, China; (2) National Centre for Computer Animation, Bournemouth University, Poole, United Kingdom; (3) Center for Optical Imagery Analysis and Learning, State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Xi'an, China
Source title:IEEE Transactions on Cybernetics
Abbreviated source title:IEEE Trans. Cybern.
Volume:45
Issue:12
Issue date:December 2015
Publication year:2015
Pages:2693-2706
Article number:6999918
Language:English
ISSN:21682267
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:Motion capture is an important technique with a wide range of applications in areas such as computer vision, computer animation, film production, and medical rehabilitation. Even with the professional motion capture systems, the acquired raw data mostly contain inevitable noises and outliers. To denoise the data, numerous methods have been developed, while this problem still remains a challenge due to the high complexity of human motion and the diversity of real-life situations. In this paper, we propose a data-driven-based robust human motion denoising approach by mining the spatialoral patterns and the structural sparsity embedded in motion data. We first replace the regularly used entire pose model with a much fine-grained partlet model as feature representation to exploit the abundant local body part posture and movement similarities. Then, a robust dictionary learning algorithm is proposed to learn multiple compact and representative motion dictionaries from the training data in parallel. Finally, we reformulate the human motion denoising problem as a robust structured sparse coding problem in which both the noise distribution information and the temporal smoothness property of human motion have been jointly taken into account. Compared with several state-of-the-art motion denoising methods on both the synthetic and real noisy motion data, our method consistently yields better performance than its counterparts. The outputs of our approach are much more stable than that of the others. In addition, it is much easier to setup the training dataset of our method than that of the other data-driven-based methods. &copy; 2013 IEEE.
Number of references:59
Main heading:Computer vision
Controlled terms:Animation
Uncontrolled terms:Better performance - Computer animation - Denoising approach - Denoising problems - Dictionary learning algorithms - Feature representation - Motion capture system - Noise distribution
DOI:10.1109/TCYB.2014.2381659

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 150>

Accession number:20145000311902
Title:763 fs Passively mode-locked Yb:Y<inf>2</inf>SiO<inf>5</inf> laser with a graphene oxide absorber mirror
Authors:Zhu, Hongtong (1); Cai, Wei (1); Wei, Jiafeng (1); Liu, Jie (1); Zheng, Lihe (2); Su, Liangbi (2); Xu, Jun (2); Wang, Yonggang (3)
Author affiliation:(1) Shandong Provincial Key Laboratory of Optics and Photonic Device, College of Physics and Electronics, Shandong Normal University, Jinan, China; (2) Key Laboratory of Transparent and Opto-functional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, China; (3) State Key Laboratory of Transient Optics and Photonics, Xian Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xian, China
Corresponding author:Liu, Jie
Source title:Optics and Laser Technology
Abbreviated source title:Opt Laser Technol
Volume:68
Issue date:May 2015
Publication year:2015
Pages:120-123
Language:English
ISSN:00303992
CODEN:OLTCAS
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:Based on a graphene oxide absorber mirror, the laser-diode pumped mode-locked Yb:Y<inf>2</inf>SiO<inf>5</inf> (Yb:YSO) laser was demonstrated for the first time. The laser generated pulses with pulse duration as short as ~763 fs and average output power of 700 mW at the central wavelength of 1059 nm. The corresponding peak power and energy of a single pulse were ~8.6 kW and ~7.4 nJ, respectively. To our best knowledge, this is the shortest bulk mode-locked laser based on graphene oxide.
Number of references:22
Main heading:Laser mirrors
Controlled terms:Graphene - Laser mode locking - Locks (fasteners) - Mirrors - Mode-locked fiber lasers - Passive mode locking - Pumping (laser) - Q switched lasers - Ytterbium
Uncontrolled terms:Average output power - Central wavelength - Graphene oxides - Laser-diode-pumped - Mode-locked - Passively mode-locked - Pulse durations - Single pulse
Classification code:547.2  Rare Earth Metals - 601.3  Mechanisms - 741.3  Optical Devices and Systems - 744.1  Lasers, General - 761  Nanotechnology - 804  Chemical Products Generally
DOI:10.1016/j.optlastec.2014.11.018

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 151>

Accession number:20154401475320
Title:Measurement of defocused spot parameters of optical system
Authors:Li, Kun (1); Chen, Yong-Quan (1); Zhao, Jian-Ke (1); Duan, Ya-Xuan (1); Li, Qiao-Ling (1); Pan, Liang (1); Long, Jiang-Bo (1); Zhang, Hai-Yang (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
Corresponding author:Li, Kun
Source title:Guangxue Jingmi Gongcheng/Optics and Precision Engineering
Abbreviated source title:Guangxue Jingmi Gongcheng
Volume:23
Issue:9
Issue date:September 1, 2015
Publication year:2015
Pages:2482-2489
Language:Chinese
ISSN:1004924X
CODEN:GJGOF4
Document type:Journal article (JA)
Publisher:Chinese Academy of Sciences
Abstract:Defocused spot parameters of an optical system were measured by a testing system with CCD microscopic imaging quantitatively, and an evaluating method for the defocused spot parameters was designed. Firstly, the definitions of the defocused spot parameters including the diameter and the roundness were given. The connected region shaped by the energy contour of the defocused spots was analyzed, and the diameter equal to the area which is 80% of the total energy of the defocused spots was calculated. Then, the boundary of the region was fitted as an ellipse and the roundness of defocused spot was obtained. The method introduces the ellipse fit into the defocused spot roundness measurement through analysis of the energy distribution of star point image on image plane, so that the effects of CCD noise and stray light in test environment on the measuring results are reduced and the confidence of the test results is improved. The experimental results show that the repeatability of the diameter is 0.18 &mu;m and that of the roundness is 1.65%. The method meets the needs of the optical systems in space projects for the imaging quality control. &copy;, 2015, Chinese Academy of Sciences. All right reserved.
Number of references:15
Main heading:Optical systems
Controlled terms:Geometry - Quality control - Stray light
Uncontrolled terms:Defocused spot parameter - Ellipse fitting - Energy contours - Microscopic system - Region filling
Classification code:741.1  Light/Optics - 741.3  Optical Devices and Systems - 913.3  Quality Assurance and Control - 921  Mathematics
DOI:10.3788/OPE.20152309.2482

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 152>

Accession number:20151100635503
Title:Research and design of portable photoelectric rotary table data-Acquisition and analysis system
Authors:Yang, Dawei (1); Yang, Xiufang (1); Han, Junfeng (2); Yan, Xiaoxu (3)
Author affiliation:(1) Faculty of Mechanical and Precision Instrument Engineering, Xi'an University of Technology, Xi'an, China; (2) 96st Unit, 91439 Troop of the PLA, Dalian, China; (3) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
Corresponding author:Yang, Dawei
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9449
Volume title:International Conference on Photonics and Optical Engineering, icPOE 2014
Part number:1 of 1
Issue date:2015
Publication year:2015
Article number:944920
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628415650
Document type:Conference article (CA)
Conference name:International Conference on Photonics and Optical Engineering, icPOE 2014
Conference date:October 13, 2014  -  October 15, 2014
Conference location:Xi'an, China
Conference code:111356
Sponsor:Optics and Photonics Society of Singapore; Shaanxi Optical Society; Shaanxi Provincial Physical Society
Publisher:SPIE
Abstract:Photoelectric rotary table as the main test tracking measurement platform, widely use in shooting range and aerospace fields. In the range of photoelectric tracking measurement system, in order to meet the photoelectric testing instruments and equipment of laboratory and field application demand, research and design the portable photoelectric rotary table data acquisition and analysis system, and introduces the FPGA device based on Xilinx company Virtex-4 series and its peripheral module of the system hardware design, and the software design of host computer in VC++ 6.0 programming platform and MFC package based on class libraries. The data acquisition and analysis system for data acquisition, display and storage, commission control, analysis, laboratory wave playback, transmission and fault diagnosis, and other functions into an organic whole, has the advantages of small volume, can be embedded, high speed, portable, simple operation, etc. By photoelectric tracking turntable as experimental object, carries on the system software and hardware alignment, the experimental results show that the system can realize the data acquisition, analysis and processing of photoelectric tracking equipment and control of turntable debugging good, and measurement results are accurate, reliable and good maintainability and extensibility. The research design for advancing the photoelectric tracking measurement equipment debugging for diagnosis and condition monitoring and fault analysis as well as the standardization and normalization of the interface and improve the maintainability of equipment is of great significance, and has certain innovative and practical value.. &copy; 2015 SPIE.
Number of references:10
Main heading:Program debugging
Controlled terms:Application programs - Computer debugging - Computer hardware - Computer peripheral equipment - Computer programming - Computer systems programming - Computer testing - Condition monitoring - Data acquisition - Data communication equipment  - Digital storage - Equipment - Failure analysis - Fault detection - Field programmable gate arrays (FPGA) - Hardware - Instrument testing - Maintainability - Photoelectricity - Photonics  - Program diagnostics - Software design - Software testing
Uncontrolled terms:Data acquisition and analysis system - Field application - Instruments and equipments - Measurement equipment - Measurement system - portable - Research designs - VC
Classification code:421  Strength of Building Materials; Mechanical Properties - 422  Strength of Building Materials; Test Equipment and Methods - 605  Small Tools and Hardware - 712  Electronic and Thermionic Materials - 716  Telecommunication; Radar, Radio and Television - 717  Optical Communication - 718  Telephone Systems and Related Technologies; Line Communications - 721.3  Computer Circuits - 722  Computer Systems and Equipment - 723  Computer Software, Data Handling and Applications - 741.1  Light/Optics - 744  Lasers - 901  Engineering Profession - 913.5  Maintenance - 921  Mathematics - 941  Acoustical and Optical Measuring Instruments - 942  Electric and Electronic Measuring Instruments - 943  Mechanical and Miscellaneous Measuring Instruments - 944  Moisture, Pressure and Temperature, and Radiation Measuring Instruments
DOI:10.1117/12.2075398

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 153>

Accession number:20151000594576
Title:Preparation and properties of low-loss core-cladding structural Ge-Sb-Se chalcogenide glass fibers
Authors:Xu, Yantao (1); Guo, Haitao (1); Lu, Min (1); Wei, Wei (1); Peng, Bo (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Insitute of Optics and Procession Mechanics, Chinese Academy of Sciences, Xi'an, China
Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering
Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.
Volume:44
Issue:1
Issue date:January 25, 2015
Publication year:2015
Pages:182-187
Language:Chinese
ISSN:10072276
Document type:Journal article (JA)
Publisher:Chinese Society of Astronautics
Abstract:For solving the problems about Ge system chalcogenide glass fiber's relatively high loss, etc, high- purity Ge<inf>28</inf>Sb<inf>12</inf>Se<inf>60</inf> glass was prepared by chemical and physical methods of purification. The absorptions caused by C, H, O impurities were obviously reduced in IR band. Ge<inf>28</inf>Sb<inf>12</inf>Se<inf>58</inf>S<inf>2</inf> chalcogenide glass tube with precision wall and fine optical properties was prepared by means of tube-rotating technique. Fibers with core-cladding structure were drawn by rod-in-tube method. The diameter of the fiber is 50&plusmn;1.5 &mu;m and the bending test showed the diameter of the circle is 5 mm. The fiber loss is 2.2 dB/m (except those at 2.87 and 4.5 &mu;m). &copy;, 2015, Chinese Society of Astronautics. All right reserved.
Number of references:12
Main heading:Selenium compounds
Controlled terms:Antimony - Chalcogenides - Fibers - Germanium - Glass fibers - Optical properties - Tubes (components)
Uncontrolled terms:Chalcogenide glass - Chalcogenide glass fibers - Cladding structures - GE systems - High purity - Physical methods - Rotating technique - Tube methods
Classification code:413  Insulating Materials - 546.4  Antimony and Alloys - 616.1  Heat Exchange Equipment and Components - 741.1  Light/Optics - 804  Chemical Products Generally - 812  Ceramics, Refractories and Glass - 817  Plastics and Other Polymers: Products and Applications

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 154>

Accession number:20153001050865
Title:Fast and accurate circle detection based on trigonometric functions
Authors:Wu, Mengjie (1, 2); Song, Zongxi (1); Gao, Wei (1); Li, Bin (1, 2)
Author affiliation:(1) Space Optics Laboratory, Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China
Corresponding author:Song, Zongxi
Source title:Journal of Information and Computational Science
Abbreviated source title:J. Inf. Comput. Sci.
Volume:12
Issue:10
Issue date:June 20, 2015
Publication year:2015
Pages:3863-3871
Language:English
ISSN:15487741
Document type:Journal article (JA)
Publisher:Binary Information Press
Abstract:Fast and accurate detection of circle is a challenging computer vision problem [1]. This paper takes fully advantages of circle good symmetry to calculate the midpoints of adjacent edge points in the horizontal direction. Based on the sine function reflected by the y coordinate values of midpoints and distance value l from the midpoints to the origin O and the cosine function reflected by the x coordinate values of midpoints and l, the midpoints are projected to parameter space. The main contributions of our work are threefold. 1) The problem of circle detection is formulated as sine curve and cosine curve detection. 2) The abundant phase information carried by trigonometric functions avoids the large amount calculation of Hough Transform. 3) A probabilistic scheme to recognize phase range is applied to circle detection. 1548-7741/Copyright &copy; 2015 Binary Information Press
Number of references:8
Main heading:Functions
Controlled terms:Computer vision - Cosine transforms - Crystal symmetry - Curve fitting - Hough transforms
Uncontrolled terms:Circle detection - Computer vision problems - Cosine functions - Detection of circles - Parameter spaces - Phase information - Probabilistic scheme - Trigonometric functions
Classification code:723.5  Computer Applications - 921  Mathematics - 933.1.1  Crystal Lattice
DOI:10.12733/jics20106137

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 155>

Accession number:20153901310772
Title:Dynamic response of the optical resonant cavity to light-wave
Authors:Feng, Li-Li (1, 2); Ruan, Chi (1); Wang, Yun-Tao (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China
Corresponding author:Wang, Yun-Tao
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:44
Issue:8
Issue date:August 1, 2015
Publication year:2015
Article number:0814001
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:The dynamic response of optical resonant cavity has been theoretically studied, by taking resonant cavity as a linear and time invariant system and through the approach of Signal Processing. The mathematical description obtained could fit any form of light waves. From the perspective of Signal Processing, the traditional pulse and continues wave cavity ring-down spectroscopy could be considered as observation of impulse response and step response respectively. Furthermore, the cavity response to the light-wave linearly frequency chirped has been studied, in the condition of slow chirp. The Fourier analysis of light power passed through cavity has been made and an analytic description has been given, which reveals the fact that the signal spectrum of light power is related to the absorption spectrum of material inside cavity. Based on this theoretic analysis, a new approach of cavity enhanced absorption spectroscopy has been put forward, called Frequency Domain Cavity Ring-Down Spectroscopy. The result would facilitates the research of cavity enhanced spectroscopy techniques, as well others using resonant cavity, such as P-D-H laser frequency stabilization. &copy;, 2015, Chinese Optical Society. All right reserved.
Number of references:21
Page count:6
Main heading:Absorption spectroscopy
Controlled terms:Absorption spectra - Band structure - Cavity resonators - Dynamic response - Electromagnetic wave absorption - Fourier analysis - Frequency domain analysis - Frequency stability - Impulse response - Invariance  - Laser spectroscopy - Light measurement - Signal processing - Slow light - Spectroscopy - Spectrum analysis - Stabilization
Uncontrolled terms:Analytic descriptions - Cavity enhanced absorption spectroscopy - Cavity enhanced spectroscopy - Cavity ring down spectroscopies - Laser frequency stabilization - Linear and time invariants - Mathematical descriptions - Resonant cavity enhanced
Classification code:408.1  Structural Design, General - 711  Electromagnetic Waves - 714.3  Waveguides - 716.1  Information Theory and Signal Processing - 731.1  Control Systems - 741.1  Light/Optics - 751  Acoustics, Noise. Sound - 752  Sound Devices, Equipment and Systems - 801  Chemistry - 921  Mathematics - 933  Solid State Physics - 941  Acoustical and Optical Measuring Instruments - 941.4  Optical Variables Measurements - 942  Electric and Electronic Measuring Instruments - 943  Mechanical and Miscellaneous Measuring Instruments - 944  Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 951  Materials Science
DOI:10.3788/gzxb20154408.0814001

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 156>

Accession number:20150900587393
Title:Efficient object detection by prediction in 3D space
Authors:Pang, Yanwei (1); Jiang, Xiaoheng (1); Li, Xuelong (2); Pan, Jing (3)
Author affiliation:(1) School of Electronic Information Engineering, Tianjin University, Tianjin, China; (2) Center for OPTical IMagery Analysis and Learning (OPTIMAL), State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xi'an, Shaanxi, China; (3) School of Electronic Engineering, Tianjin University of Technology and Education, Tianjin, China
Corresponding author:Pang, Yanwei
Source title:Signal Processing
Abbreviated source title:Signal Process
Volume:112
Issue date:July 2015
Publication year:2015
Pages:64-73
Language:English
ISSN:01651684
CODEN:SPRODR
Document type:Journal article (JA)
Publisher:Elsevier
Abstract:Because the scale, horizontal and vertical coordinates of an object in an image are arbitrary, so object detection can be viewed as a process of searching the object in the 3D space spanned by the scale, horizontal, and vertical factors. Traditional sliding window based method has to exhaustively search and check the 3D space, resulting in prohibitive computation cost. To deal with this problem, in this paper, we propose to explore both the scaling capacity and translation capacity of object detector to accelerate detection speed, without loss of detection accuracy. In our paradigm, scaling capacity can relieve the use of all possible sizes of templates at the first stage, i.e.; only a few number of templates that can cover a large range of target object size are used to coarsely find the targets. Similarly, translation capacity can avoid dense grid sampling at the very beginning. After initial estimation, further evaluations with templates of finer scales are carried out around the candidates to verify the existence of target objects. Moreover, different from traditional uniform grid scanning, we present an interlaced scanning method called diamond grid scanning which can reduce redundant evaluation. Experimental results on face detection demonstrate the advantage of our method. &copy; 2014 Elsevier B.V.
Number of references:30
Main heading:Object detection
Controlled terms:Face recognition - Object recognition - Scanning
Uncontrolled terms:Computation costs - Detection accuracy - Efficient object detections - Initial estimation - Interlaced scanning - Scaling capacity - Sliding window-based - Vertical coordinates
Classification code:716  Telecommunication; Radar, Radio and Television - 741.3  Optical Devices and Systems
DOI:10.1016/j.sigpro.2014.08.039

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 157>

Accession number:20151500736500
Title:All-normal dispersion passively mode-locked Yb-doped fiber laser with Bi<inf>2</inf>Te<inf>3</inf>absorber
Authors:Li, Lu (1, 2); Wang, Yonggang (1); Sun, Hang (1); Duan, Lina (1); Wang, Xi (1); Si, Jinhai (2)
Author affiliation:(1) Chinese Academy of Sciences, Xi'An Institute of Optics and Precision Mechanics, State Key Laboratory of Transient Optics and Photonics, No. 17, Xinxi Road, Xi'an, China; (2) Xi'An Jiaotong University, Key Laboratory for Physical Electronics and Devices, Shaanxi Key Laboratory of Information Photonic Technique, No. 28 Xianning-xilu, Xi'an, China
Corresponding author:Wang, Yonggang
Source title:Optical Engineering
Abbreviated source title:Opt Eng
Volume:54
Issue:4
Issue date:April 1, 2015
Publication year:2015
Article number:046101
Language:English
ISSN:00913286
E-ISSN:15602303
CODEN:OPEGAR
Document type:Journal article (JA)
Publisher:SPIE
Abstract:An all-normal dispersion passively mode-locked Yb-doped fiber laser with a Bi<inf>2</inf>Te<inf>3</inf>absorber is presented. The modulation depth of this kind of saturable absorber was measured to be 8.4%. By incorporating a Bi<inf>2</inf>Te<inf>3</inf>/PVA film into a Yb-doped fiber laser oscillator, a mode-locked fiber laser oscillator was achieved. The repetition rate and the central wavelength are 25.6 MHz and 1052.7 nm, respectively. The 3-dB spectral width is 0.45 nm and the pulse duration is 417 ps. The results indicate that topological insulator Bi<inf>2</inf>Te<inf>3</inf>possesses the potential for ultrafast fiber laser application. &copy; 2015 Society of Photo-Optical Instrumentation Engineers.
Number of references:32
Main heading:Mode-locked fiber lasers
Controlled terms:Dispersion (waves) - Electric insulators - Fiber lasers - Fibers - Locks (fasteners) - Passive mode locking - Saturable absorbers - Ytterbium
Uncontrolled terms:All normal dispersions - Central wavelength - Mode-locked laser - Modulation depth - Passively mode-locked - Topological insulators - Ultrafast fiber lasers - Yb doped fiber laser
Classification code:547.2  Rare Earth Metals - 601.3  Mechanisms - 704  Electric Components and Equipment - 711.1  Electromagnetic Waves in Different Media - 744.1  Lasers, General - 744.4  Solid State Lasers - 812  Ceramics, Refractories and Glass - 817  Plastics and Other Polymers: Products and Applications
DOI:10.1117/1.OE.54.4.046101

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 158>

Accession number:20155201714946
Title:The design of aerial camera focusing mechanism
Authors:Hu, Changchang (1, 2); Yang, Hongtao (1); Niu, Haijun (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9677
Monograph title:AOPC 2015: Optical Test, Measurement, and Equipment
Issue date:2015
Publication year:2015
Article number:96771F
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628419023
Document type:Conference article (CA)
Conference name:Applied Optics and Photonics, China: Optical Test, Measurement, and Equipment, AOPC 2015
Conference date:May 5, 2015  -  May 7, 2015
Conference location:Beijing, China
Conference code:117015
Sponsor:Chinese Society for Optical Engineering
Publisher:SPIE
Abstract:In order to ensure the imaging resolution of aerial camera and compensating defocusing caused by the changing of atmospheric temperature, pressure, oblique photographing distance and other environmental factor [1,2], and to meeting the overall design requirements of the camera for the lower mass and smaller size, the linear focusing mechanism is designed. Through the target surface support, the target surface component is connected with focusing driving mechanism. Make use of precision ball screws, focusing mechanism transforms the input rotary motion of motor into linear motion of the focal plane assembly. Then combined with the form of linear guide restraint movement, the magnetic encoder is adopted to detect the response of displacement. And the closed loop control is adopted to realize accurate focusing. This paper illustrated the design scheme for a focusing mechanism and analyzed its error sources. It has the advantages of light friction and simple transmission chain and reducing the transmission error effectively. And this paper also analyses the target surface by finite element analysis and lightweight design. Proving that the precision of focusing mechanism can achieve higher than 3um, and the focusing range is &plusmn;2mm. &copy; 2015 SPIE.
Number of references:8
Main heading:Focusing
Controlled terms:Ball screws - Cameras - Design - Fasteners - Finite element method - Light transmission - Mathematical transformations - Optical testing
Uncontrolled terms:Closed-loop control - Environmental factors - Focal plane assemblies - Focusing mechanisms - Imaging resolutions - lightweight - Transmission chains - Transmission error
Classification code:605  Small Tools and Hardware - 732.1  Control Equipment - 741.1  Light/Optics - 741.3  Optical Devices and Systems - 742.2  Photographic Equipment - 921.3  Mathematical Transformations - 921.6  Numerical Methods
DOI:10.1117/12.2199676

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 159>

Accession number:4307460
Title:Fast hyperspectral anomaly detection via high-order 2-d crossing filter
Authors:Yuan, Yuan (1); Wang, Qi (2); Zhu, Guokang (1)
Author affiliation:(1) Center for OPTical IMagery Analysis and Learning (OPTIMAL), State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics of Sciences, Xi'an 710119, China; (2) Center for OPTical IMagery Analysis and Learning (OPTIMAL), Northwestern Polytechnical University, Xi'an 710072, China
Source title:IEEE Transactions on Geoscience and Remote Sensing
Abbreviated source title:IEEE Trans Geosci Remote Sens
Volume:53
Issue:2
Issue date:February 2015
Publication year:2015
Pages:620-630
Article number:6846340
Language:English
ISSN:01962892
CODEN:IGRSD2
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:Anomaly detection has been an important topic in hyperspectral image analysis. This technique is sometimes more preferable than the supervised target detection because it requires no a priori information for the interested materials. Many efforts have been made in this topic; however, they usually suffer from excessive time cost and a high false-positive rate. There are two major problems that lead to such a predicament. First, the construction of the background model and affinity estimation are often overcomplicated. Second, most of these methods have to impose a stringent assumption on the spectrum distribution of background; however, these assumptions cannot hold for all practical situations. Based on this consideration, this paper proposes a novel method allowing for fast yet accurate pixel-level hyperspectral anomaly detection. We claim the following main contributions: 1) construct a high-order 2-D crossing approach to find the regions of rapid change in the spectrum, which runs without any a priori assumption; and 2) design a low-complexity discrimination framework for fast hyperspectral anomaly detection, which can be implemented by a series of filtering operators with linear time cost. Experiments on three different hyperspectral images containing several pixel-level anomalies demonstrate the superiority of the proposed detector compared with the benchmark methods. &copy; 2014 IEEE.
Number of references:36
Controlled terms:anomaly - detection method - image analysis - pixel - remote sensing
Classification code:71.8.5.4  Remote sensing: numerical and image analysis
DOI:10.1109/TGRS.2014.2326654

Database:GEOBASE
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 160>

Accession number:20151100635555
Title:Compact diode-pumped nanosecond Nd:YVO<inf>4</inf> grazing-incidence slab amplifier
Authors:Sun, Zhe (1); Li, Qiang (1); Hui, Yongling (1); Jiang, Menghua (1); Lei, Hong (2)
Author affiliation:(1) Institute of Laser Engineering, Beijing University of Technology, Beijing, China; (2) Xi'an Institute of Optics and Precision Mechanic, Chinese Academy of Sciences, Xi'an, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9449
Volume title:International Conference on Photonics and Optical Engineering, icPOE 2014
Part number:1 of 1
Issue date:2015
Publication year:2015
Article number:94491G
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628415650
Document type:Conference article (CA)
Conference name:International Conference on Photonics and Optical Engineering, icPOE 2014
Conference date:October 13, 2014  -  October 15, 2014
Conference location:Xi'an, China
Conference code:111356
Sponsor:Optics and Photonics Society of Singapore; Shaanxi Optical Society; Shaanxi Provincial Physical Society
Publisher:SPIE
Abstract:A high average power and high beam quality nanosecond laser is presented that is based on CW diode side-pumped Nd:YVO<inf>4</inf>grazing-incidence slab amplifier. A TEM00, passively Q-switched diode-pumped Nd:YAG laser as the seed laser, generating a M<sup>2</sup> 1.3 beam train of 0.25W, 2.3ns pulses with adjustable repetition rate in the range 5-20kHz. After double-pass amplification, more than 20W of output power with a beam quality of M<sup>2</sup> 1.4 is obtained at an optical-optical efficiency of 35%. The high brightness of this laser system seems ideal for nonlinear optics and laser processing applications. &copy; 2015 SPIE.
Number of references:10
Main heading:Pumping (laser)
Controlled terms:Diodes - Lasers - Neodymium lasers - Nonlinear optics - Optical pumping - Photonics - Pulse repetition rate - Solid state lasers
Uncontrolled terms:Diode pumped Nd: YAG - Diode-pumped - Double-pass amplification - Laser amplifiers - Nanosecond - Optical-optical efficiency - Passively Q-switched - Slab
Classification code:714.2  Semiconductor Devices and Integrated Circuits - 741.1  Light/Optics - 741.1.1  Nonlinear Optics - 744.1  Lasers, General - 744.4  Solid State Lasers
DOI:10.1117/12.2076333

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 161>

Accession number:20151200656431
Title:Analyzing time walk error of leading trailing edge CFD of timing discrimination for gaussian and rayleigh distribution waveform
Authors:Dong, Lijun (1); Liu, Ke (1); Guo, Lei (1); Miao, Yinxiao (1); Xin, Liwei (2)
Author affiliation:(1) Beijing Aerospace Institute for Metrology, Measurement Technology, Beijng, China; (2) Xi'an Institute of Optics, Precision Mechanics of Chinese Academy of Sciences, Xi'an, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9446
Volume title:Ninth International Symposium on Precision Engineering Measurements and Instrumentation
Part number:1 of 1
Issue date:2015
Publication year:2015
Article number:944642
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628415612
Document type:Conference article (CA)
Conference name:9th International Symposium on Precision Engineering Measurements and Instrumentation, ISPEMI 2014
Conference date:August 8, 2014  -  August 10, 2014
Conference location:Changsha, China
Conference code:111505
Sponsor:China Instrument and Control Society; Chinese Society for Measurement; International Committee on Measurements and Instrumentation; National Natural Science Foundation of China
Publisher:SPIE
Abstract:In this study we analyze one of a CFD for timing discrimination. Walk error, drift and precision are the three performance parameters of timing discrimination. The walk error is the most important error type generally. Firstly, we divided the waveform into two types. One is the Gaussian waveform distribution which has three parameters: Amplitude, mean, and the pulse width; and the other is Rayleigh waveform distribution which has two parameters: mean and pulse. We analyzed different situations with their changing parameter, and the drift value of time can be obtained for each parameter changing. &copy;2015 SPIE.
Number of references:11
Main heading:Precision engineering
Controlled terms:Gaussian distribution
Uncontrolled terms:Gaussian waveforms - Rayleigh waveforms - Time walks - Timing discrimination - Trailing edges
Classification code:761  Nanotechnology - 922.1  Probability Theory
DOI:10.1117/12.2181701

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 162>

Accession number:20153201113047
Title:Dual-loss-modulated passively Q-switched Tm:LuAG laser with multi-walled carbon nanotube and monolayer graphene
Authors:Luan, C. (1); Yang, K.J. (1, 2); Zhao, J. (1); Zhao, S.Z. (1); Li, G.Q. (1); Li, D.C. (1); Li, T. (1); Qiao, W.C. (1); Zheng, L.H. (3); Xu, J. (3); Wang, Q.G. (3); Xu, X.D. (3); Su, L.B. (3); Wang, Y.G. (4)
Author affiliation:(1) School of Information Science and Engineering, Shandong University, Jinan, China; (2) State Key Laboratory of Crystal Material, Shandong University, Jinan, China; (3) Key Laboratory of Transparent and Opto-functional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Beijing, China; (4) State Key Laboratory of Transient Optics and Photonics, Xi&rsquo;an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi&rsquo;an, China
Corresponding author:Zhao, S.Z.
Source title:Applied Physics B: Lasers and Optics
Abbreviated source title:Appl Phys B
Volume:120
Issue:4
Issue date:September 20, 2015
Publication year:2015
Pages:759-763
Language:English
ISSN:09462171
CODEN:APBOEM
Document type:Journal article (JA)
Publisher:Springer Verlag
Abstract:By simultaneously using a multi-walled carbon nanotube (MWCNT) and a monolayer graphene saturable absorber (SA) in the cavity, a laser-diode-pumped dual-loss-modulated passively Q-switched Tm:LuAG laser at 2&nbsp;&mu;m is demonstrated for the first time. In comparison with the singly passively Q-switched laser with MWCNT or monolayer graphene SA, the doubly passively Q-switched laser with both MWCNT and monolayer graphene SA can generate shorter pulse width and higher peak power. A maximum pulse width compression ratio of 2.8 and a highest peak power enhancement factor of 4 were obtained at the incident pump power of 5.8&nbsp;W, respectively. The experimental results show that the dual-loss modulation is an efficient method to compress the pulse widths and improve the peak powers of the Q-switched lasers at 2&nbsp;&mu;m. &copy; 2015, Springer-Verlag Berlin Heidelberg.
Number of references:30
Main heading:Multiwalled carbon nanotubes (MWCN)
Controlled terms:Compression ratio (machinery) - Graphene - Monolayers - Optical pumping - Pulse generators - Pumping (laser) - Q switched lasers - Q switching - Saturable absorbers - Yarn
Uncontrolled terms:Dual loss modulations - Dual-loss-modulated - Graphene saturable absorbers - Incident pump power - Laser-diode-pumped - Passively Q-switched - Passively Q-switched lasers - Pulsewidths
DOI:10.1007/s00340-015-6193-y

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 163>

Accession number:20150600486419
Title:Analytical soliton solutions for the cubic&ndash;quintic nonlinear Schr&ouml;dinger equation with Raman effect in the nonuniform management systems
Authors:Wang, Ping (1, 2); Feng, Li (1, 3); Shang, Tao (1); Guo, Lixin (2); Cheng, Guanghua (4); Du, Yingjie (5)
Author affiliation:(1) State Key Laboratory of Integrated Service Networks, School of Telecommunications Engineering, Xidian University, Xi&rsquo;an, China; (2) School of Physics and Optoelectronic Engineering, Xidian University, Xi&rsquo;an, China; (3) Zhuhai Comleader Information Science and Technology Co., Ltd, Zhengzhou, China; (4) State Key Laboratory of Transient Optics and Photonics, Xi&rsquo;an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi&rsquo;an, China; (5) Department of Physics, Northwest University, Xi&rsquo;an, China
Corresponding author:Wang, Ping
Source title:Nonlinear Dynamics
Abbreviated source title:Nonlinear Dyn
Volume:79
Issue:1
Issue date:2015
Publication year:2015
Pages:387-395
Language:English
ISSN:0924090X
CODEN:NODYES
Document type:Journal article (JA)
Publisher:Kluwer Academic Publishers
Abstract:Based on the Kundu&ndash;Eckhaus equation with variable coefficients, the exact one-soliton and two-soliton solutions have been explicitly given by an appropriate similarity transformation method. As an example, an exponential distributed fiber control system, nonlinearity management system and dispersion management system have been considered, and the propagation characteristics of the exact soliton solutions in the three nonuniform management systems have been investigated in detail. Especially, the dynamic properties of the amplitude, pulse width and the central position of the soliton with transmission distance have been studied. The results have some guiding significance for soliton amplification, compression and control management, and can provide some theoretical analysis for carrying out optical soliton communication experiment. &copy; 2014, Springer Science+Business Media Dordrecht.
Number of references:29
Main heading:Solitons
Controlled terms:Control nonlinearities - Nonlinear equations - Optical communication
Uncontrolled terms:Dispersion management - Fiber systems - Guiding significances - Nonlinearity management - Optical soliton communication - Propagation characteristics - Similarity transformation - Transmission distances
Classification code:717.1  Optical Communication Systems - 731.1  Control Systems - 921.1  Algebra
DOI:10.1007/s11071-014-1672-y

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 164>

Accession number:20155201717483
Title:Optical system design of dual-spectrum autocollimator
Authors:Wei, Yongjing (1, 2); Wu, Yiming (1); Xiao, Maosen (1); Lu, Weiguo (1)
Author affiliation:(1) Xian Institute of Optics and Precision Mechanic, Chinese Academy of Sciences, Xian, China; (2) University of Chinese Academy of Sciences, Beijing, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9676
Monograph title:AOPC 2015: Optical Design and Manufacturing Technologies
Issue date:2015
Publication year:2015
Article number:96760Y
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628419016
Document type:Conference article (CA)
Conference name:Applied Optics and Photonics, China: Optical Design and Manufacturing Technologies, AOPC 2015
Conference date:May 5, 2015  -  May 7, 2015
Conference location:Beijing, China
Conference code:117014
Sponsor:Chinese Society for Optical Engineering
Publisher:SPIE
Abstract:The optical system design of a new dual-spectrum autocollimator which can measure two different spatial azimuths simultaneously is proposed. According to the principle of dual-spectrum autocollimator, ZEMAX software is used to design and optimize the optical system. Since two light sources with different wavelength are used in the autocollimator, chromatic aberration is required to reduce off in the optical system design. The experimental results demonstrate that the measuring range of the dual-spectrum autocollimator is up to &plusmn;30', the deviation is less than 1a3, and the resolution can reach 0.1. The designed autocollimator can simultaneously measure two different azimuths fastly and accurately. &copy; 2015 SPIE.
Number of references:10
Main heading:Optical systems
Controlled terms:Aberrations - Design - Light sources - Manufacture - Optical design - Systems analysis
Uncontrolled terms:Autocollimators - Chromatic aberration - Dual-spectrum - Measuring ranges
Classification code:537.1  Heat Treatment Processes - 741.1  Light/Optics - 741.3  Optical Devices and Systems - 961  Systems Science
DOI:10.1117/12.2200976

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 165>

Accession number:20152100877442
Title:Low-cost robust polymer optical fiber temperature sensor based on FIR method for in situ measurement
Authors:Du, Xin-Chao (1, 2); He, Zheng-Quan (1); Lin, Xiao (1); Zhou, Li-Bin (3); Hu, Bao-Wen (1); Luo, Bao-Ke (1); Guo, Xiao-Yi (1); Kong, De-Peng (1); Ren, Li-Yong (1); Li, Yu-Lin (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China; (3) Department of Physics, Northwest University, Xi'an, China
Corresponding author:He, Zheng-Quan
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:44
Issue:4
Issue date:April 1, 2015
Publication year:2015
Article number:0406003
Language:English
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:An optical fiber temperature sensor using two fluorescent dyes based on Fluorescence Intensity Ratiometric (FIR) method was proposed. In experiment, Rhodamine B and Rhodamine 110, which were temperature-sensitive and temperature-insensitive respectively, acted as the sensing materials. Polymer optical fibers were utilized to transmit excitation light and collect emitted fluorescence. The two dyes- fluorescence spectra could be separated conveniently since their respective emission peaks were 60 nm apart. The optimal spectral intervals of RH110 and RHB for FIR were identified. By calculating the fluorescence intensity ratio of the two dyes, the calibration curves of intensities ratios vs temperature were obtained with good linearity. The effects of different concentrations of fluorophore on the calibration curves were also studied. When the concentrations of dyes were 0.3 g/L, a minimum rms temperature error of 0.28 and a sensitivity of 0.0128/ were achieved. Moreover, the influences of illumination source-s fluctuations and dyes- photo-bleaching can be eliminated to some degree. &copy;, 2015, Chinese Optical Society. All right reserved.
Number of references:21
Page count:7
Main heading:Fluorophores
Controlled terms:Calibration - Fibers - Fluorescence - Optical fibers - Plastic optical fibers - Polymers - Temperature sensors
Uncontrolled terms:Dual fluorescence - Fiber temperature sensors - Fluorescence intensities - Fluorescence intensity ratio - Fluorescence spectra - Illumination sources - Temperature sensitive - Temperature-insensitive
Classification code:732  Control Devices - 741.1  Light/Optics - 741.1.2  Fiber Optics - 812  Ceramics, Refractories and Glass - 815.1  Polymeric Materials - 817  Plastics and Other Polymers: Products and Applications - 941  Acoustical and Optical Measuring Instruments - 942  Electric and Electronic Measuring Instruments - 943  Mechanical and Miscellaneous Measuring Instruments - 944  Moisture, Pressure and Temperature, and Radiation Measuring Instruments
DOI:10.3788/gzxb20154404.0406003

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 166>

Accession number:20151100620608
Title:Low-power-threshold photonic saturable absorber in nonlinear chalcogenide glass
Authors:Minardi, S. (1); Cheng, G. (2, 3); D'Amico, C. (2); Stoian, R. (2)
Author affiliation:(1) Institute of Applied Physics, Abbe Center of Photonics, Friedrich-Schiller Universit&auml;t, Jena, Germany; (2) Laboratoire Hubert Curien, UMR 5516 CNRS, Universit&eacute; de Lyon, Saint Etienne, France; (3) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, CAS, Xi'an, Shaanxi, China
Corresponding author:Stoian, R.
Source title:Optics Letters
Abbreviated source title:Opt. Lett.
Volume:40
Issue:2
Issue date:January 15, 2015
Publication year:2015
Pages:257-259
Language:English
ISSN:01469592
E-ISSN:15394794
CODEN:OPLEDP
Document type:Journal article (JA)
Publisher:Optical Society of American (OSA)
Abstract:We experimentally demonstrate controllable nonlinear modulation of optical guiding in ultrafast laser-written evanescently coupled waveguide arrays in bulk gallium lanthanum sulfide chalcogenide glass. The intensity-dependent response is validated by simulating light propagation in waveguide arrays with instantaneous Kerr nonlinearity using a discrete-continuous spatiotemporal unidirectional Maxwell equation model. The intensity-driven modulation of transmission in multicore structures acts as a potential saturable absorber at kilowatt threshold levels. &copy; 2015 Optical Society of America.
Number of references:23
Main heading:Saturable absorbers
Controlled terms:Chalcogenides - Glass - Light propagation - Maxwell equations - Modulation - Nonlinear optics - Optical waveguides - Ultrafast lasers - Waveguides
Uncontrolled terms:Chalcogenide glass - Coupled waveguides - Gallium lanthanum sulfides - Intensity-dependent - Kerr nonlinearity - Nonlinear chalcogenides - Nonlinear modulation - Threshold levels
Classification code:714.3  Waveguides - 716  Telecommunication; Radar, Radio and Television - 717  Optical Communication - 718  Telephone Systems and Related Technologies; Line Communications - 741.1  Light/Optics - 741.1.1  Nonlinear Optics - 744.1  Lasers, General - 812.3  Glass - 921.2  Calculus
DOI:10.1364/OL.40.000257

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 167>

Accession number:20151100635557
Title:A new designed impedance matching circuit used for gated framing camera
Authors:Zhu, Bingli (1); Bai, Xiaohong (1); Bai, Yonglin (1); Gou, Yongsheng (1); Liu, Baiyu (1); Wang, Bo (1); Qin, Junjun (1)
Author affiliation:(1) Key Laboratory of Ultrafast Photoelectric Diagnostic Technology, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9449
Volume title:International Conference on Photonics and Optical Engineering, icPOE 2014
Part number:1 of 1
Issue date:2015
Publication year:2015
Article number:94491I
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628415650
Document type:Conference article (CA)
Conference name:International Conference on Photonics and Optical Engineering, icPOE 2014
Conference date:October 13, 2014  -  October 15, 2014
Conference location:Xi'an, China
Conference code:111356
Sponsor:Optics and Photonics Society of Singapore; Shaanxi Optical Society; Shaanxi Provincial Physical Society
Publisher:SPIE
Abstract:Framing camera based on gated Micro-channel plate (MCP) was widely used in inertial confinement fusion (ICF) and Z-pinch because of its ultrafast time-resolve. Electrons with imaging information are multiplied when the HV pulse propagating through the MCP strip line. Obviously, the HV pulse was used as a shutter here, then the exposure time of the imagine will be determined by the width of the pulse. Theoretical analysis indicates that thegating pulse(200ps) has a bandwidth of 5GHz, thus, impedance match in the propagating path of the pulse will be very important. Impedance mismatch will cause reflecting of the pulse and decrease the transmission efficiency. This will cause un-uniformity of the dynamic gain of the MCP, and finally resulting in imagedistortion. A new designed impedance matching circuit is developed in this paper. Simulated results showedthatthe newdesignedimpedance matching circuit couldreduce the reflection of thegating pulse significantly, and dynamicgain uniformity of the MCP was increased simultaneously. &copy; 2015 SPIE.
Number of references:6
Main heading:Image storage tubes
Controlled terms:Cameras - Impedance matching (electric) - Inertial confinement fusion - Photonics - Pinch effect
Uncontrolled terms:Framing Camera - Imaging information - Impedance matching circuits - Impedance mismatch - Matching circuit - Micro channel plate - Simulated results - Transmission efficiency
Classification code:621.2  Fusion Reactors - 701  Electricity and Magnetism - 701.1  Electricity: Basic Concepts and Phenomena - 712  Electronic and Thermionic Materials - 714.1  Electron Tubes - 717  Optical Communication - 742.2  Photographic Equipment - 744  Lasers
DOI:10.1117/12.2077094

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 168>

Accession number:20151200668507
Title:Diffusion emission model for solid-state photon-enhanced thermionic emission solar energy converters
Authors:Yang, Yang (1); Yang, Wenzheng (1); Sun, Chuandong (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
Corresponding author:Yang, Yang
Source title:Materials Science in Semiconductor Processing
Abbreviated source title:Mater Sci Semicond Process
Volume:35
Issue date:July 2015
Publication year:2015
Pages:120-126
Language:English
ISSN:13698001
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:Solid-state photon-enhanced thermionic emission (PETE) solar energy converters are new devices that can directly convert solar energy into electrical power at elevated temperatures. This study proposes a new solid-state PETE device structure with a p-type doped semiconductor as the absorber. A model based on a 1D steady-state continuity equation is presented to simulate the diffusion and emission of photogenerated carriers and to calculate the efficiencies. This model can evaluate the effect of device structure and material parameters on performance and efficiency. Calculation results show that the new device is more efficient compared with the original device. A longer electron diffusion length is favourable for enhancing efficiency. Moreover, the optimal absorber thickness is predicted. Our analyses also show that the front interface strongly affects conversion efficiency, which emphasises the need to reduce interface recombination losses. The results of this study may serve as bases for the optimum design of practical solid-state PETE devices. &copy; 2015 Elsevier Ltd.
Number of references:23
Main heading:Solid state devices
Controlled terms:Diffusion - Equations of state - Photons - Solar energy - Thermionic emission
Uncontrolled terms:Continuity equations - Doped semiconductors - Electron diffusion length - Elevated temperature - Energy converters - II-IV semiconductors - Interface recombination - Photogenerated carriers
Classification code:615.2  Solar Power - 714.1  Electron Tubes - 714.2  Semiconductor Devices and Integrated Circuits - 921  Mathematics - 931.1  Mechanics - 931.3  Atomic and Molecular Physics
DOI:10.1016/j.mssp.2015.03.002

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 169>

Accession number:20160301805041
Title:Graded index porous optical fibers - Dispersion management in terahertz range
Authors:Ma, Tian (1, 2); Markov, Andrey (1); Wang, Lili (2); Skorobogatiy, Maksim (1)
Author affiliation:(1) Ecole Polytechnique de Montreal, Montreal; QC, Canada; (2) Xi'An Institute of Optics and Precision Mechanics of CAS, Xi'an, Shannxi, China
Source title:Conference on Lasers and Electro-Optics Europe - Technical Digest
Abbreviated source title:Conf Lasers Electro Opt Eur Tech Dig
Volume:2015-August
Monograph title:2015 Conference on Lasers and Electro-Optics, CLEO 2015
Issue date:August 10, 2015
Publication year:2015
Article number:7183644
Language:English
CODEN:85PNA9
ISBN-13:9781557529688
Document type:Conference article (CA)
Conference name:Conference on Lasers and Electro-Optics, CLEO 2015
Conference date:May 10, 2015  -  May 15, 2015
Conference location:San Jose, CA, United states
Conference code:116800
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:Graded index porous fiber incorporating an air-hole array featuring variable air-hole diameters and inter-hole separations is proposed. We experimentally demonstrate smaller pulse distortion, larger bandwidth and higher excitation efficiency compared to fibers with uniform porosity. &copy; 2015 OSA.
Number of references:4

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 170>

Accession number:20151100635591
Title:A new surface temperature measurement using infrared detector
Authors:Xie, Qingsheng (1); Liu, Wei (1); Leng, Hanbing (1); Yi, Bo (1); Wang, Zefeng (1); Chen, Yaohong (1); Duan, Chengpeng (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanical of CAS, Xi'an, Shaanxi, China
Corresponding author:Xie, Qingsheng
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9449
Volume title:International Conference on Photonics and Optical Engineering, icPOE 2014
Part number:1 of 1
Issue date:2015
Publication year:2015
Article number:94492Q
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628415650
Document type:Conference article (CA)
Conference name:International Conference on Photonics and Optical Engineering, icPOE 2014
Conference date:October 13, 2014  -  October 15, 2014
Conference location:Xi'an, China
Conference code:111356
Sponsor:Optics and Photonics Society of Singapore; Shaanxi Optical Society; Shaanxi Provincial Physical Society
Publisher:SPIE
Abstract:This paper describe a research theoretically of the conversion result to the surface temperature based on long wave infrared detector, proposed a temperature measurement, then validate it by experiments. First, it introduces the constitution and measurement principle of the medical infrared thermal imager. Then, the conversion drift characteristic of infrared detect is described, the experimental data under variable environment is analyzed, and a temperature measurement and a drift compensation formula is proposed. Finally, some experiment with black body was accomplished. The results show the temperature error is under 0.3&deg;C, confirm the validity of the measurement. &copy; 2015 SPIE.
Number of references:9
Main heading:Temperature measurement
Controlled terms:Atmospheric temperature - Infrared detectors - Infrared radiation - Photonics - Surface properties
Uncontrolled terms:Drift compensation - Infrared thermal imager - Long wave infrared detectors - Surface temperature measurement - Surface temperatures - Temperature error - Temperature measures - Variable environment
Classification code:443.1  Atmospheric Properties - 741.1  Light/Optics - 741.3  Optical Devices and Systems - 944.6  Temperature Measurements - 944.7  Radiation Measuring Instruments - 951  Materials Science
DOI:10.1117/12.2075552

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 171>

Accession number:20152200883484
Title:High peak power sub-nanosecond mode-locked pulse characteristics of Nd:GGG laser
Authors:Zhao, Jia (1); Zhao, Shengzhi (1); Li, Tao (1); Li, Yufei (1); Yang, Kejian (1); Li, Guiqiu (1); Li, Dechun (1); Qiao, Wenchao (1); Feng, Chuansheng (1); Wang, Yonggang (2)
Author affiliation:(1) School of Information Science and Engineering, Shandong University, 27 Shanda South Road, Jinan, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
Corresponding author:Zhao, Jia
Source title:Optics and Laser Technology
Abbreviated source title:Opt Laser Technol
Volume:73
Issue date:May 26, 2015
Publication year:2015
Pages:162-165
Language:English
ISSN:00303992
CODEN:OLTCAS
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:Based on the dual-loss modulation, i.e. electro-optic (EO) modulator and GaAs saturable absorber, a sub-nanosecond mode-locked pulsed Nd:GGG laser with kHz repetition rates is presented for the first time. The repetition rate (0.5-10 kHz) of this pulsed laser is controlled by the modulation rate of EO modulator, so high stability can be obtained. The sub-nanosecond pulse width depends on the mode-locked pulse underneath the Q-switched envelope in the Q-switched mode-locked (QML) laser and high peak power can be generated. The condition on the generation of sub-nanosecond pulse and the needed threshold power for different modulation rates of EO are given. The average output power, the pulse width and the peak power versus pump power for different repetition rates are demonstrated. The shortest pulse width is 426 ps and the highest peak power reaches 239.4 kW. The experimental results show that the dual-loss modulation technology with EO and GaAs saturable absorber in QML laser is an efficient method to generate sub-nanosecond mode-locked pulsed laser with kHz repetition rates. &copy; 2015 Elsevier Ltd. All rights reserved.
Number of references:27
Main heading:Pulsed lasers
Controlled terms:Gallium arsenide - Locks (fasteners) - Mode-locked fiber lasers - Modulation - Neodymium lasers - Optical pumping - Pulse generators - Pulse repetition rate - Q switching - Saturable absorbers  - Semiconducting gallium
Uncontrolled terms:Average output power - Dual loss modulations - Electro-optic modulators - GaAs saturable absorber - High peak power - Mode-locked pulse - Q-switched envelopes - Sub-nanosecond pulse
Classification code:601.3  Mechanisms - 712.1.1  Single Element Semiconducting Materials - 713.4  Pulse Circuits - 716  Telecommunication; Radar, Radio and Television - 717  Optical Communication - 718  Telephone Systems and Related Technologies; Line Communications - 741.1  Light/Optics - 744  Lasers - 804  Chemical Products Generally
DOI:10.1016/j.optlastec.2015.04.025

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 172>

Accession number:20153301166083
Title:Four wave mixing in 5&lt;sup&gt;th&lt;/sup&gt; order cascaded CMOS compatible ring resonators
Authors:Jin, Li (1); Pasquazi, Alessia (2); Di Lauro, Luigi (2); Peccianti, Marco (2); Little, Brent E. (3); Moss, David J. (4); Morandotti, Roberto (5); Chu, Sai T. (1)
Author affiliation:(1) City University of Hong Kong, Kowloon Tong, Hong Kong; (2) Department of Physics and Astronomy, University of Sussex, Falmer, Brighton, United Kingdom; (3) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an, China; (4) School of Electrical and Computer Engineering, RMIT University, Melbourne; VIC, Australia; (5) INRS - &Eacute;nergie, Mat&eacute;riaux et T&eacute;l&eacute;communications, 1650 Blvd Lionel Boulet, Varennes; QC, Canada
Source title:Integrated Photonics Research, Silicon and Nanophotonics, IPRSN 2015
Abbreviated source title:Integr. Photonics Res., Silicon and Nanophotonics, IPRSN 2015
Monograph title:Integrated Photonics Research, Silicon and Nanophotonics, IPRSN 2015
Issue date:2015
Publication year:2015
Pages:371p
Article number:IT3B.1
Language:English
ISBN-13:9781557520005
Document type:Conference article (CA)
Conference name:Integrated Photonics Research, Silicon and Nanophotonics, IPRSN 2015
Conference date:June 27, 2015  -  July 1, 2015
Conference location:Boston, MA, United states
Sponsor:Amercian Elements; LUCEDA Photonics; Optiwave Systems, Inc.; SwissLitho; Synopsys
Publisher:Optical Society of America (OSA)
Abstract:We report wavelength conversion via four wave mixing in CMOS compatible 5&lt;sup&gt;th&lt;/sup&gt; order cascaded microring resonator. &copy; 2014 Optical Society of America.
Number of references:5
Main heading:Four wave mixing
Controlled terms:Nanophotonics - Optical resonators - Photonics - Resonators
Uncontrolled terms:CMOS Compatible - Microring resonator - Ring resonator
Classification code:741.1  Light/Optics - 741.3  Optical Devices and Systems

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 173>

Accession number:20150400457312
Title:Bound-state fiber laser mode-locked by a graphene-nanotube saturable absorber
Authors:Yang, H.R. (1); Chen, G.W. (1); Kong, Y.C. (1); Li, W.L. (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
Source title:Laser Physics
Abbreviated source title:Laser Phys.
Volume:25
Issue:2
Issue date:February 1, 2015
Publication year:2015
Article number:025101
Language:English
ISSN:1054660X
E-ISSN:15556611
Document type:Journal article (JA)
Publisher:Institute of Physics Publishing
Abstract:We have experimentally observed the multiple bound states in a linear-cavity fiber laser mode-locked by a mixture of graphene and single-walled carbon nanotubes. The proposed laser can deliver the fundamental frequency soliton as well as the two and three bound-state solitons at suitable conditions. The numerical simulations confirm the experimental observations. Both the theoretical predictions and experimental results reveal that the spectral filtering effect plays a key role on the lasers. &copy; 2015 Astro Ltd.
Number of references:62
Main heading:Mode-locked fiber lasers
Controlled terms:Fiber lasers - Graphene - Laser modes - Locks (fasteners) - Saturable absorbers - Single-walled carbon nanotubes (SWCN) - Solitons - Yarn
Uncontrolled terms:All-fiber lasers - Bound state - Fundamental frequencies - Linear cavity - Mode-locked - Spectral filtering - Suitable conditions
Classification code:601.3  Mechanisms - 744.1  Lasers, General - 744.4  Solid State Lasers - 761  Nanotechnology - 804  Chemical Products Generally - 819.4  Fiber Products - 931.3  Atomic and Molecular Physics
DOI:10.1088/1054-660X/25/2/025101

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 174>

Accession number:20150900586927
Title:Low-rank representation for 3D hyperspectral images analysis from map perspective
Authors:Yuan, Yuan (1); Fu, Min (1); Lu, Xiaoqiang (1)
Author affiliation:(1) Center for OPTical IMagery Analysis and Learning (OPTIMAL), State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xi'an, Shaanxi, China
Corresponding author:Lu, Xiaoqiang
Source title:Signal Processing
Abbreviated source title:Signal Process
Volume:112
Issue date:July 2015
Publication year:2015
Pages:27-33
Language:English
ISSN:01651684
CODEN:SPRODR
Document type:Journal article (JA)
Publisher:Elsevier
Abstract:Hyperspectral images naturally stand as 3D data, which carry semantic information in remote sending applications. To well utilize 3D hyperspectral images, signal processing and learning techniques have been widely exploited, and the basis is to divide a given hyperspectral data into a set of semantic classes for analysis, i.e.; segmentation. To segment given hyperspectral data is an important and challenging research theme. Recently, to reduce the amount of human labor required to label samples in hyperspectral image segmentation, many approaches have been proposed and achieved good performance with a few labeled samples. However, most of them fail to exploit the high spectral correlation in distinct bands and utilize the spatial information of hyperspectral data. In order to overcome these drawbacks, a novel framework jointing the maximum a posteriori (MAP) model and low-rank representation (LRR) is proposed. In this paper, low-rank representation, conducted as a latent variables, can exploit the high spectral correlation in distinct bands and obtain a more compact and discriminative representation. On the other hand, a novel MAP framework is driven by using low-rank representation coefficient as latent variables, which will improve the probability that the closer pixels can be divided into the same class. The experiment results and quantitative analysis demonstrate that the proposed approach is effective and can obtain high segmentation accuracy compared with state-of-the-art approaches. &copy; 2014 Elsevier B.V.
Number of references:28
Main heading:Image segmentation
Controlled terms:Image analysis - Independent component analysis - Markov processes - Random variables - Remote sensing - Semantics - Signal processing - Spectroscopy - Structural frames
Uncontrolled terms:Hyperspectral Data - Low-rank representations - Markov Random Fields - Maximum a posteriori - Semantic analysis
Classification code:408.2  Structural Members and Shapes - 716.1  Information Theory and Signal Processing - 723.2  Data Processing and Image Processing - 723.4  Artificial Intelligence - 731.1  Control Systems - 741  Light, Optics and Optical Devices - 741.1  Light/Optics - 801  Chemistry - 903.2  Information Dissemination - 922.1  Probability Theory
DOI:10.1016/j.sigpro.2014.06.018

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 175>

Accession number:20153601250881
Title:Design and experiment of cyclic olefin copolymer based 2.5 THz hollow-core photonic crystal fiber
Authors:Chen, Qi (1, 4); Zhu, Wenjing (1); He, Xiaoyang (1, 4); Kong, Depeng (2); Miao, Jing (2); Luo, Zhenfei (3, 4); Zhou, Xun (3, 4); Yang, Chun (1, 4); Zhang, Jian (1, 4); Zhou, Chuanming (4)
Author affiliation:(1) Institute of Electronic Engineering, CAEP, Mianyang, China; (2) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (3) Research Center of Laser Fusion, CAEP, Chengdu, China; (4) Terahertz Research Center, CAEP, Mianyang, China
Corresponding author:Yang, Chun
Source title:Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams
Abbreviated source title:Qiangjiguang Yu Lizishu
Volume:27
Issue:8
Issue date:August 1, 2015
Publication year:2015
Article number:083102
Language:Chinese
ISSN:10014322
CODEN:QYLIEL
Document type:Journal article (JA)
Publisher:Editorial Office of High Power Laser and Particle Beams
Abstract:Efficient transmission of terahertz (THz) wave is an important research direction in development of THz technology. Polymeric photonic crystal fiber (PCF) is ideal in THz waveguide transmission because of the advantages of low loss, low dispersion and fine flexibility to bend. Based on the full vector finite element method (FEM), a hollow-core PCF with operating frequency of 2.5 THz is designed. Some samples made of cyclic olefin copolymer (COC) are fabricated. The fiber transmission performance of THz wave is measured by using the CO&lt;inf&gt;2&lt;/inf&gt; pump laser THz source. The measured minimum loss is 0.17 dB/cm and the average loss is about 0.5 dB/cm. The fluctuation of transmission loss is less than 5% after the fiber is bent 90&deg;, showing good flexibility to bend. The measured mode field distribution results of the output port show that the optical fiber transmits signals through the main mode, so the THz energy is well bound in the core of optical fiber. &copy;, 2015, Editorial Office of High Power Laser and Particle Beams. All right reserved.
Number of references:13
Page count:5
Main heading:Photonic crystal fibers
Controlled terms:Crystal whiskers - Fibers - Finite element method - Nonlinear optics - Olefins - Optical fiber fabrication - Optical fibers - Photonic crystals - Pumping (laser) - Terahertz waves  - Wave transmission
Uncontrolled terms:Cyclic Olefin Copolymers - Fiber transmissions - Full vector finite element methods - Hollow core photonic crystal fiber - Hollow cores - Operating frequency - Polymeric photonic crystals - Tera Hertz
Classification code:711  Electromagnetic Waves - 741  Light, Optics and Optical Devices - 744.1  Lasers, General - 801.4  Physical Chemistry - 804.1  Organic Compounds - 812  Ceramics, Refractories and Glass - 817  Plastics and Other Polymers: Products and Applications - 921.6  Numerical Methods
DOI:10.11884/HPLPB201527.083102

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 176>

Accession number:20152701006712
Title:Autofocusing and resolution enhancement in speckleilluminated digital holographic microscopy
Authors:Gao, Peng (1, 2); Zheng, Juanjuan (1); Yao, Baoli (1); Pedrini, Giancarlo (2); Osten, Wolfgang (2)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) Institut f&uuml;r Technische Optik, Universit&auml;t Stuttgart, Pfaffenwaldring 9, Stuttgart, Germany
Corresponding author:Yao, Baoli
Source title:Digital Holography and Three-Dimensional Imaging, DH 2015
Abbreviated source title:Digit. Hologr. and Three-Dimens. Imaging, DH 2015
Issue date:May 18, 2015
Publication year:2015
Pages:410p
Language:English
ISBN-13:9781557529916
Document type:Conference article (CA)
Conference name:Digital Holography and Three-Dimensional Imaging, DH 2015
Conference date:May 24, 2015  -  May 28, 2015
Conference location:Shanghai, China
Sponsor:American Elements
Publisher:Optical Society of America (OSA)
Abstract:Sequential speckle illumination is incorporated into digital holographic microscopy (DHM) for autofocusing and resolution enhancement. The feasibility of the proposed method is demonstrated by microscopic phase imaging on a transparent sample.
Number of references:13
Main heading:Holography
Controlled terms:Computer generated holography - Microscopic examination - Phase measurement
Uncontrolled terms:Auto-focusing - Digital holographic microscopy - Phase imaging - Resolution enhancement
Classification code:743  Holography - 743.1  Holographic Techniques - 746  Imaging Techniques - 942.2  Electric Variables Measurements

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 177>

Accession number:20152801012067
Title:Graded index porous optical fibers - dispersion management in terahertz range
Authors:Ma, Tian (1, 2); Markov, Andrey (1); Wang, Lili (2); Skorobogatiy, Maksim (1)
Author affiliation:(1) Ecole Polytechnique de Montreal, Montreal; QC, Canada; (2) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an, Shannxi, China
Source title:CLEO: Science and Innovations, CLEO-SI 2015
Abbreviated source title:CLEO: Sci. and Innov., CLEO-SI 2015
Issue date:May 4, 2015
Publication year:2015
Pages:2267
Language:English
ISBN-13:9781557529688
Document type:Conference article (CA)
Conference name:CLEO: Science and Innovations, CLEO-SI 2015
Conference date:May 10, 2015  -  May 15, 2015
Conference location:San Jose, CA, United states
Publisher:Optical Society of America (OSA)
Abstract:Graded index porous fiber incorporating an air-hole array featuring variable air-hole diameters and inter-hole separations is proposed. We experimentally demonstrate smaller pulse distortion, larger bandwidth and higher excitation efficiency compared to fibers with uniform porosity. &copy; OSA 2015.
Number of references:4
DOI:10.1364/CLEO_AT.2015.JW2A.56

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 178>

Accession number:20151100635588
Title:Optical system design for wide-angle airborne mapping camera with diffractive optical element
Authors:Niu, Hai-Jun (1, 2); Zhang, Jian (1); Yan, A-Qi (1, 2); Leng, Han-Bing (1); Fei, Jia-Qi (1); Wu, Deng-Shan (1); Cao, Jian-Zhong (2)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of CAS Xi'an, China; (2) Graduate University of Chinese Academy of Sciences Beijing, Beijing, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9449
Volume title:International Conference on Photonics and Optical Engineering, icPOE 2014
Part number:1 of 1
Issue date:2015
Publication year:2015
Article number:94492N
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628415650
Document type:Conference article (CA)
Conference name:International Conference on Photonics and Optical Engineering, icPOE 2014
Conference date:October 13, 2014  -  October 15, 2014
Conference location:Xi'an, China
Conference code:111356
Sponsor:Optics and Photonics Society of Singapore; Shaanxi Optical Society; Shaanxi Provincial Physical Society
Publisher:SPIE
Abstract:With the development of the digital airborne photo-grammetry technology, the more performances of the optical system for airborne mapping camera are required, such as the longer focal, the wider field of view (FOV), at the same time, the secondary spectrum correction becomes more important and difficult for the optical system design. A high performance optical system of airborne mapping camera with 200mm focus and2=60&deg;FOV is designed in this paper. The range of work wavelength is from 430nm to 885nm. A two-layer HDOE with negative dispersive characteristic is used to eliminate the secondary spectrum in the process of optical system design. The diffraction efficiency of the designed two-layer HDOE is up to 90%. From the result of design, the MTFs in whole fields are over 0.5 at 90lp/mm, which shows that the system has a great image quality. Meantime, the thermal analysis is done at the temperature range between -20&deg;C and 40&deg;C, and the MTF curves of the system at-20&deg;C &sim;40&deg;C show that a great image quality is kept, which meets the design requirements. &copy; 2015 SPIE.
Number of references:13
Main heading:Optical systems
Controlled terms:Cameras - Density (optical) - Design - Diffractive optical elements - Image quality - Mapping - Photonics - Systems analysis - Thermoanalysis
Uncontrolled terms:Airborne mapping - Airborne photo - Dispersive characteristic - Field of views - Harmonic diffractive optical element(HDOE) - Secondary spectrums - Temperature range - Wide angle
Classification code:408  Structural Design - 741  Light, Optics and Optical Devices - 742.2  Photographic Equipment - 801  Chemistry - 902.1  Engineering Graphics - 961  Systems Science
DOI:10.1117/12.2085042

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 179>

Accession number:20151200657787
Title:Spectral-Spatial Kernel Regularized for Hyperspectral Image Denoising
Authors:Yuan, Yuan (1); Zheng, Xiangtao (1); Lu, Xiaoqiang (1)
Author affiliation:(1) Center for Optical Imagery Analysis and Learning, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
Source title:IEEE Transactions on Geoscience and Remote Sensing
Abbreviated source title:IEEE Trans Geosci Remote Sens
Volume:53
Issue:7
Issue date:July 2015
Publication year:2015
Pages:3815-3832
Article number:7054493
Language:English
ISSN:01962892
CODEN:IGRSD2
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:Noise contamination is a ubiquitous problem in hyperspectral images (HSIs), which is a challenging and promising theme in many remote sensing applications. A large number of methods have been proposed to remove noise. Unfortunately, most denoising methods fail to take full advantages of the high spectral correlation and to simultaneously consider the specific noise distributions in HSIs. Recently, a spectral-spatial adaptive hyperspectral total variation (SSAHTV) was proposed and obtained promising results. However, the SSAHTV model is insensitive to the image details, which makes the edges blur. To overcome all of these drawbacks, a spectral-spatial kernel method for HSI denoising is proposed in this paper. The proposed method is inspired by the observation that the spectral-spatial information is highly redundant in HSIs, which is sufficient to estimate the clear images. In this paper, a spectral-spatial kernel regularization is proposed to maintain the spectral correlations in spectral dimension and to match the original structure between two spatial dimensions. Moreover, an adaptive mechanism is developed to balance the fidelity term according to different noise distributions in each band. Therefore, it cannot only suppress noise in the high-noise band but also preserve information in the low-noise band. The reliability of the proposed method in removing noise is experimentally proved on both simulated data and real data. &copy; 2015 IEEE.
Number of references:47
Main heading:Image denoising
Controlled terms:Independent component analysis - Remote sensing - Spectroscopy - Target tracking
Uncontrolled terms:Adaptive kernels - De-noising - Hyperspectral images - Non local means (NLM) - Remote sensing applications - Spatial informations - Spatial kernels - Spectral correlation
Classification code:716.2  Radar Systems and Equipment - 723.2  Data Processing and Image Processing - 723.4  Artificial Intelligence - 731.1  Control Systems - 801  Chemistry
DOI:10.1109/TGRS.2014.2385082

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 180>

Accession number:20154501513537
Title:Adaptive nonuniformity correction algorithm based on multiscale temporal moment matching
Authors:Leng, Han-Bing (1); Hu, Bing-Liang (1); Zhou, Zuo-Feng (1); Tang, Li-Nao (1); Zhang, Jian (1); Yan, A-Qi (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
Corresponding author:Leng, Han-Bing
Source title:Hongwai Yu Haomibo Xuebao/Journal of Infrared and Millimeter Waves
Abbreviated source title:Hongwai Yu Haomibo Xuebao
Volume:34
Issue:4
Issue date:August 1, 2015
Publication year:2015
Pages:401-405
Language:English
ISSN:10019014
CODEN:HHXUEZ
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:The fixed pattern noise of uncooled infrared focal plane arrays has the similar characteristics with the stripe noise. By researching the moment matching and temporal high-pass filter, a novel multiscale temporal moment matching nonuniformity correction algorithm was proposed. In the proposed algorithm, global motion was first identified by the Gaussian pyramid of the adjacent uncorrected images. Then the temporal moment matching was performed in all levels of Gaussian pyramids and Laplacian pyramids. The experimental results with the real infrared video sequences have shown that the proposed algorithm can significantly increase the convergence speed and reduce the ghosting artifacts. &copy;, 2015, Chinese Optical Society. All right reserved.
Number of references:8
Main heading:Image matching
Controlled terms:Algorithms - High pass filters - Image segmentation - Laplace transforms
Uncontrolled terms:Fixed pattern noise - Gaussian pyramids - Ghosting artifacts - Laplacian Pyramid - Nonuniformity correction - Nonuniformity correction algorithm - Temporal moments - Uncooled infrared focal plane arrays
Classification code:703.2  Electric Filters - 921.3  Mathematical Transformations
DOI:10.11972/j.issn.1001-9014.2015.04.004

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 181>

Accession number:20155201719066
Title:Sparse representation based on multiscale bilateral filter for infrared image using compressed sensing
Authors:Han, Jiaojiao (1); Qin, Hanlin (1); Leng, Hanbing (2); Yan, Xiang (1); Li, Jia (1, 3); Zhou, Huixin (1)
Author affiliation:(1) School of Physics and Optoelectronic Engineering, Xidian University, Xi'an, China; (2) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (3) Science Institute, Air Force Engineering University, Xi'an, China
Corresponding author:Qin, Hanlin(hlqin@mail.xidian.edu.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9674
Monograph title:AOPC 2015: Optical and Optoelectronic Sensing and Imaging Technology
Issue date:2015
Publication year:2015
Article number:96742Q
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628418996
Document type:Conference article (CA)
Conference name:Applied Optics and Photonics, China: Optical and Optoelectronic Sensing and Imaging Technology, AOPC 2015
Conference date:May 5, 2015  -  May 7, 2015
Conference location:Beijing, China
Conference code:117013
Sponsor:Chinese Society for Optical Engineering
Publisher:SPIE
Abstract:Compressed sensing is an arisen and significant theory, which has been widely used in infrared image reconstruction and many methods based on compressed sensing have been proposed. However, the existing methods can hardly accurately reconstruct infrared images. Considering that the sparsity of an infrared image plays a crucial role in compressed sensing to accurately reconstruct image, this paper presents a new sparse representation (MBFSF) that integrates the multiscale bilateral filter with shearing filter to overcome the above disadvantage. Firstly, one approximation subband image and a series of detail subband images at different scales and directions are obtained by the MBFSF. Then, in view of the feature that the most information is preserved in the approximation subband image, the proposed method only measures the detail subband images and preserves the approximation subband image. Subsequently, a very sparse random measurement matrix is used for the measurement at the detail subband images to reduce the computation cost and storage of large random measurement matrices in compressed sensing. Finally, an accelerated iterative hard thresholding algorithm is employed to reconstruct the infrared image. Experimental results show that the proposed method has superior performance in terms of reconstruction accuracy and compares favorably with existing compressed sensing methods, which is an effective method in high-resolution infrared imaging based on compressed sensing. &copy; 2015 SPIE.
Number of references:20
Main heading:Image reconstruction
Controlled terms:Compressed sensing - Computation theory - Image processing - Imaging techniques - Infrared imaging - Iterative methods - Shearing - Signal reconstruction - Thermography (imaging)
Uncontrolled terms:Computation costs - High resolution infrared - Iterative hard thresholding - Multi-scale bilateral - Random measurement - Reconstruction accuracy - Sparse representation - Subband images
Classification code:604.1  Metal Cutting - 716.1  Information Theory and Signal Processing - 721.1  Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory - 742.1  Photography - 746  Imaging Techniques - 921.6  Numerical Methods
DOI:10.1117/12.2202706

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 182>

Accession number:20153701273096
Title:In situ optical measurements of Chang'E-3 landing site in Mare Imbrium: 1. Mineral abundances inferred from spectral reflectance
Authors:Zhang, Hao (1); Yang, Yazhou (1); Yuan, Ye (1); Jin, Weidong (1); Lucey, Paul G. (2); Zhu, Meng-Hua (3); Kaydash, Vadim G. (4); Shkuratov, Yuriy G. (4); Di, Kaichang (5); Wan, Wenhui (5); Xu, Bin (5); Xiao, Long (1); Wang, Ziwei (1); Xue, Bin (6)
Author affiliation:(1) Planetary Science Institute, School of Earth Sciences, China University of Geosciences, Wuhan, China; (2) Hawaii Institute of Geophysics and Planetology, University of Hawaii, Honolulu; HI, United States; (3) Space Science Institute, Macau University of Science and Technology, Taipa, China; (4) Astronomical Institute, Kharkov V.N. Karazin National University, Kharkov, Ukraine; (5) State Key Laboratory of Remote Sensing Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing, China; (6) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
Corresponding author:Zhang, Hao
Source title:Geophysical Research Letters
Abbreviated source title:Geophys. Res. Lett.
Volume:42
Issue:17
Issue date:September 16, 2015
Publication year:2015
Pages:6945-6950
Language:English
ISSN:00948276
E-ISSN:19448007
CODEN:GPRLAJ
Document type:Journal article (JA)
Publisher:Blackwell Publishing Ltd
Abstract:The visible and near-infrared imaging spectrometer on board the Yutu Rover of Chinese Chang'E-3 mission measured the lunar surface reflectance at a close distance (&sim;1 m) and collected four spectra at four different sites. These in situ lunar spectra have revealed less mature features than that measured remotely by spaceborne sensors such as the Moon Mineralogy Mapper instrument on board the Chandrayaan-1 mission and the Spectral Profiler on board the Kaguya over the same region. Mineral composition analysis using a spectral lookup table populated with a radiative transfer mixing model has shown that the regolith at the landing site contains high abundance of olivine. The mineral abundance results are consistent with that inferred from the compound measurement made by the on board alpha-particle X-ray spectrometer. &copy;2015. American Geophysical Union. All Rights Reserved.
Number of references:26
Main heading:Lunar missions
Controlled terms:Infrared devices - Infrared imaging - Infrared spectroscopy - Minerals - Moon - Optical data processing - Reflection - Remote sensing - Silicate minerals - Spectrometers  - Table lookup - Thermography (imaging) - X ray spectrometers
Uncontrolled terms:Chang'E-3 mission - Lunar surface - Planetary remote sensing - Reflectance spectroscopy - Visible and infrared spectroscopies
DOI:10.1002/2015GL065273

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 183>

Accession number:20154701591304
Title:A novel satellite cluster design based on tree architecture
Authors:He, Huang (1); Jun, Zhou (1); Tao, Bai (2)
Author affiliation:(1) College of Astronautics, Institute of Precision Guidance and Control, Northwestern Polytechnical University, Xi'an, China; (2) Academy of Opto-Electronics, Chinese Academy of Science, Beijing, China
Corresponding author:He, Huang(huanghe1984@nwpu.edu.cn)
Source title:Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering
Abbreviated source title:Proc. Inst. Mech. Eng. Part G J. Aerosp. Eng.
Volume:229
Issue:14
Issue date:December 1, 2015
Publication year:2015
Pages:2659-2670
Language:English
ISSN:09544100
E-ISSN:20413025
CODEN:PMGEEP
Document type:Journal article (JA)
Publisher:SAGE Publications Ltd
Abstract:This paper is focused on how to design a cluster for a fractionated spacecraft mission, which benefits from the relative communication and navigation of the cluster satellites while keeping the satellites a safe distance apart. The fractionated spacecraft cluster is classified as the tightly controlled formation and the unconsolidated formation. Five parameters will define a satellite cluster, which will reflect the scale, combination, and the space structure of the cluster. A satellite cluster based on the tree architecture is proposed, and the relative combination calculation method for different relative orbits of different tree layers is presented. Simulation results have shown that the cluster satellites can be maintained within a certain distance using the tree architecture. &copy; IMechE 2015.
Number of references:18
Main heading:Cluster computing
Controlled terms:Architecture - Communication satellites - Forestry - Orbits - Satellites - Spacecraft
Uncontrolled terms:Fractionated spacecraft - Relative distances - Satellite clusters - Tree architectures - Unconsolidated formations
Classification code:402  Buildings and Towers - 655  Spacecraft - 722.4  Digital Computers and Systems
DOI:10.1177/0954410015585153

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 184>

Accession number:20160501882038
Title:Design of short wave infrared imaging spectrometer system based on CDP
Authors:Zhang, Zhoufeng (1, 2, 3); Hu, Bingliang (1); Yin, Qinye (2); Yu, Tao (1); Li, Siyuan (1); Gao, Xiaohui (1); Zhang, Hongjian (1)
Author affiliation:(1) Key Laboratory of Spectral Imaging Technique, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an, China; (3) University of Chinese Academy of Sciences, Beijing, China
Source title:Optics Express
Abbreviated source title:Opt. Express
Volume:23
Issue:23
Issue date:November 16, 2015
Publication year:2015
Pages:29758-29763
Language:English
E-ISSN:10944087
Document type:Journal article (JA)
Publisher:OSA - The Optical Society
Abstract:A compact static infrared snapshot imaging spectrometer (ISIS) is designed in order to satisfy the application requirements of real-Time spectral imaging for the moving targets. It consists of a CDP (crossed dispersion prism), an imaging lens, and a detector. Here we describe the spectral imaging principle, and design a short wave infrared imaging spectrometer with 4.8&deg; field of view, the measured spectrum is from 0.9&mu;m to 2.5&mu;m and is sampled by 40 spectral channels. This instrument has a large potential for detecting, locating and identifying unknown energetic events in real-Time. &copy;2014 Optical Society of America.
Number of references:14
Main heading:Thermography (imaging)
Controlled terms:Infrared imaging - Infrared radiation - Spectrometers - Spectroscopy
Uncontrolled terms:Application requirements - Field of views - Imaging lens - Imaging spectrometers - Moving targets - Short wave infrared - Spectral channels - Spectral imaging
Classification code:741.1  Light/Optics - 741.3  Optical Devices and Systems - 742.1  Photography - 746  Imaging Techniques
DOI:10.1364/OE.23.029758

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 185>

Accession number:20151100635500
Title:A kind of transmission-type lens using in x-ray band
Authors:Li, Yan (1); Li, Xiao-Li (1); Xu, Xiangyan (2)
Author affiliation:(1) Shool of Science, Xi'an Shiyou University, Xi'an, Shaanxi Province, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9449
Volume title:International Conference on Photonics and Optical Engineering, icPOE 2014
Part number:1 of 1
Issue date:2015
Publication year:2015
Article number:944917
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628415650
Document type:Conference article (CA)
Conference name:International Conference on Photonics and Optical Engineering, icPOE 2014
Conference date:October 13, 2014  -  October 15, 2014
Conference location:Xi'an, China
Conference code:111356
Sponsor:Optics and Photonics Society of Singapore; Shaanxi Optical Society; Shaanxi Provincial Physical Society
Publisher:SPIE
Abstract:The negative refractive index characteristics of one-dimensional photonic crystal consisted by Fibonacci multi-layer films has been studied by numerical method. The refractive indices for two materials, which are used to construct the Fibonacci multi-layer films, are 0.920 and 0.999, respectively. The calculation result shows that, on one hand, there are several negative refractive index zones for this kind of photonic crystal even if the refractive indices are very small; on the other hand, the difference is very large for the frequency between the zones. As an example, a kind of transmission-type plano-concave lens is designed. The simulation of the electromagnetic field distribution for the lens demonstrates that the lens can focus the incoming X-ray radiation. At the same time, the calculation of the absorption strength and refractive indices for real materials shows that not only there are large differences for the absorption strength with different materials, but also the refractive indices for real materials are different in X-ray band. Obviously, the characteristics above support a kind of transmission-type lens using in X-ray.. &copy; 2015 SPIE.
Number of references:21
Main heading:Refractive index
Controlled terms:Electromagnetic fields - Films - Lenses - Numerical methods - Photonic crystals - Photonics - Strength of materials - X rays
Uncontrolled terms:Absorption strength - Calculation results - Concave lens - Electromagnetic field distribution - Negative refractive index - One dimensional photonic crystal - Two-materials - X ray radiation
Classification code:421  Strength of Building Materials; Mechanical Properties - 422  Strength of Building Materials; Test Equipment and Methods - 701  Electricity and Magnetism - 741.1  Light/Optics - 741.3  Optical Devices and Systems - 921.6  Numerical Methods - 932.1  High Energy Physics - 933  Solid State Physics - 951  Materials Science
DOI:10.1117/12.2075444

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 186>

Accession number:20143718145415
Title:Cavity linewidth narrowing by tunneling induced double dark resonances in triple quantum dot molecules
Authors:Tian, Si-Cong (1); Wan, Ren-Gang (2); Li, Lian-He (1); Tong, Cun-Zhu (1); Ning, Yong-Qiang (1)
Author affiliation:(1) State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China; (2) State Key Laboratory of Transient Optics and Photonics, Xian Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xian 710119, China
Corresponding author:Tong, C.-Z.(tongcz@ciomp.ac.cn)
Source title:Optics Communications
Abbreviated source title:Opt Commun
Volume:334
Issue date:January 1, 2015
Publication year:2015
Pages:94-100
Language:English
ISSN:00304018
CODEN:OPCOB8
Document type:Journal article (JA)
Publisher:Elsevier
Abstract:A scheme for obtaining a tunable ultranarrow cavity transmission controlled by two tunneling in triple quantum dots system is proposed. In such system, the tunneling can induce double dark resonances, resulting in the appearance of two transparency windows. With the steep dispersion within the narrowed transparency windows, an ultranarrow transmission peak can be obtained, compared with that of double quantum dots system. Furthermore, by varying the energy splitting, the linewidth and the position of the ultranarrow transmission peak can be engineered. Because no coupling laser is required, the scheme proposed here is more convenient for future experiments and applications in optics, and may be useful in designing novel optoelectronic devices. &copy; 2014 Elsevier B.V.
Number of references:53
Main heading:Semiconductor quantum dots
Controlled terms:Linewidth - Optoelectronic devices - Quantum optics - Transparency
Uncontrolled terms:Cavity linewidths - Double quantum dots - Electromagnetically induced transparency - Energy splittings - Linewidth narrowing - Transmission peaks - Transmission spectrums - Triple quantum
Classification code:714.2  Semiconductor Devices and Integrated Circuits - 741.1  Light/Optics - 931.3  Atomic and Molecular Physics
DOI:10.1016/j.optcom.2014.08.011

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 187>

Accession number:20152600979691
Title:Effect of geometrical parameters on flow and heat transfer performances in multi-stream spiral-wound heat exchangers
Authors:Lu, Xing (1); Zhang, Gaopeng (2); Chen, Yi-tung (3); Wang, Qiuwang (1); Zeng, Min (1)
Author affiliation:(1) Key Laboratory of Thermo-Fluid Science and Engineering, MOE, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, PR China; (2) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, Shaanxi, PR China; (3) Department of Mechanical Engineering, University of Nevada, Las Vegas, NV 89154-4027, USA
Corresponding author:Zeng, Min
Source title:Applied Thermal Engineering
Abbreviated source title:Appl Therm Eng
Issue date:December 22, 2014
Publication year:2015
Language:English
ISSN:13594311
CODEN:ATENFT
Document type:Article in Press
Publisher:Elsevier Ltd
Abstract:The influences of the changes in geometrical factors, including the space bar thickness, the tube pitch in the first layer, the tube external diameter, the number of layers and the centre core diameter on flow and heat transfer performances in multi-stream spiral-wound heat exchangers are numerical investigated. The shell-side and tube-side Nusselt number and pressure drop per unit length increase with the increase of number of layers, centre core diameter, and tube external diameter, but decrease with the increase of space bar thickness and tube pitch in the first layer. Quantitatively estimation of the affecting performances of these five geometrical parameters is implemented by using the Taguchi method, and the result shows that the contribution rate of them are more than 5%. Thus, the multivariate correlations with the main geometrical parameters considered are developed for shell-side Nusselt number and friction coefficient. &copy; 2015 Elsevier Ltd.
Main heading:Heat exchangers
Controlled terms:Computer simulation - Friction - Geometry - Heat transfer - Numerical methods - Nusselt number - Taguchi methods - Tubes (components)
Uncontrolled terms:Flow and heat transfer - Geometric parameter - Multi-stream - Multivariate correlation - Spiral wound
Classification code:616.1  Heat Exchange Equipment and Components - 641.2  Heat Transfer - 723.5  Computer Applications - 913.3  Quality Assurance and Control - 921  Mathematics - 921.6  Numerical Methods - 931.1  Mechanics
DOI:10.1016/j.applthermaleng.2015.04.084

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 188>

Accession number:20160101753584
Title:Reflector designed for light-emitting-diode lighting source in three-dimensional space
Authors:Wang, Guangzhen (1); Hou, Yu (2); Hu, Lichun (1); Tang, Wanwei (1); Gao, Jian (1); Wang, Lili (3)
Author affiliation:(1) Foundation Department, Tangshan College, Tangshan, Hebei, China; (2) Physics Department, Tangshan Normal University, Tangshan, Hebei, China; (3) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shanxi, China
Corresponding author:Wang, Guangzhen(wanggz@opt.cn)
Source title:Optik
Abbreviated source title:Optik
Volume:126
Issue:23
Issue date:2015
Publication year:2015
Pages:4534-4538
Language:English
ISSN:00304026
Document type:Journal article (JA)
Publisher:Elsevier GmbH
Abstract:Reflectors used for light-emitting-diode (LED) light source are designed in three-dimensional space to produce uniform illuminance effect. Reflector's surfaces are calculated by the source-target mapping method in Geometrical Optics. Ignoring scattering and absorption loss of the material, reflectors' performances are investigated. The simulation results show that the light efficiency which is the ratio of light flux in the target surface to that from LED light source can reach above 95%. And the illuminance uniformity which is the ratio of minimum illuminance (min E) to average illuminance (ave E) also can reach above 95%. Finally, the array of reflectors is investigated and the result shows it still has good performance. &copy; 2015 Elsevier GmbH. All rights reserved.
Number of references:11
Main heading:Light emitting diodes
Controlled terms:Geometrical optics - Light - Light sources - Lighting - Reflection
Uncontrolled terms:LED light source - Light efficiency - Light fluxes - Mapping method - Scattering and absorption - Target surface - Three dimensional space
Classification code:714.2  Semiconductor Devices and Integrated Circuits - 741.1  Light/Optics
DOI:10.1016/j.ijleo.2015.08.069

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 189>

Accession number:20161602266820
Title:Color filter array demosaicing: An adaptive progressive interpolation based on the edge type
Authors:Dong, Qiqi (1, 2); Liu, Zhaohui (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) School of University of Chinese Academy of Sciences, Beijing, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9675
Monograph title:AOPC 2015: Image Processing and Analysis
Issue date:2015
Publication year:2015
Article number:967518
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628419009
Document type:Conference article (CA)
Conference name:Applied Optics and Photonics, China: Image Processing and Analysis, AOPC 2015
Conference date:May 5, 2015  -  May 7, 2015
Conference location:Beijing, China
Conference code:117481
Sponsor:Chinese Society for Optical Engineering
Publisher:SPIE
Abstract:Color filter array (CFA) is one of the key points for single-sensor digital cameras to produce color images. Bayer CFA is the most commonly used pattern. In this array structure, the sampling frequency of green is two times of red or blue, which is consistent with the sensitivity of human eyes to colors. However, each sensor pixel only samples one of three primary color values. To render a full-color image, an interpolation process, commonly referred to CFA demosaicing, is required to estimate the other two missing color values at each pixel. In this paper, we explore an adaptive progressive interpolation based on the edge type algorithm. The proposed demosaicing method consists of two successive steps: an interpolation step that estimates missing color values according to various edges and a post-processing step by iterative interpolation. &copy; Copyright 2015 SPIE.
Number of references:11
Main heading:Color image processing
Controlled terms:Bandpass filters - Color - Digital cameras - Image analysis - Image processing - Interpolation - Iterative methods - Optical data processing - Pixels
Uncontrolled terms:Array structures - Color filter arrays - Demosaicing - Full color images - Progressive interpolations - Sampling frequencies - Three primary colors - various edges
Classification code:703.2  Electric Filters - 723.2  Data Processing and Image Processing - 741.1  Light/Optics - 742.2  Photographic Equipment - 921.6  Numerical Methods
DOI:10.1117/12.2199330

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 190>

Accession number:20161702279089
Title:Study on the technology of mutual alignment based on the fourquadrant photo electric detector
Authors:Hu, Ya-Bin (1, 2); Wang, Miao (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, CAS, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9795
Monograph title:Selected Papers of the Photoelectronic Technology Committee Conferences held June-July 2015
Issue date:2015
Publication year:2015
Article number:979501
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628418804
Document type:Conference article (CA)
Conference name:International Conference on Frontiers in International Conference on Frontiers in Terahertz Technology and Applications, and the International Symposium on Surface Topography and Optical Microscopy
Conference date:July 23, 2015  -  July 25, 2015
Conference location:Harbin, China
Conference code:117486
Sponsor:Chinese Academy of Engineering; Chinese Society for Optical Engineering; Harbin Institute of Technology; National Natural Science Foundation of China
Publisher:SPIE
Abstract:Panoramic stereo cameras and laser radars have their own coordinate system in the dynamic spatial sensing area and they have to determine the position relationship between each other through joint calibration. As using the traditional technology of mutual alignment based on the telescope cross wire is tedious and requires high operating skills, a new method of mutual alignment using lasers and four-quadrant photo electric detectors is provided after analyzing the working principle of four-quadrant photo electric detectors. Firstly make the laser beam irradiate the active area of the four-quadrant photo electric detector through coarse aiming. Then the center of a light spot offset relative to the center of the active area can be obtained according to the output voltage of four quadrants. The pose of two instruments can be adjusted properly to realize mutual alignment. The experimental results indicate that the alignment accuracy of four-quadrant detectors can meet the requirements of mutual alignment, which provides a new idea for joint calibration. &copy; 2015 SPIE.
Number of references:9
Main heading:Alignment
Controlled terms:Calibration - Laser beams - Lasers - Stereo image processing - Surface topography
Uncontrolled terms:Alignment accuracy - Co-ordinate system - Dynamic spatial - Four quadrant - Four quadrant detectors - Joint calibration - Output voltages - Spot offset
Classification code:601.1  Mechanical Devices - 723.2  Data Processing and Image Processing - 744.1  Lasers, General - 744.8  Laser Beam Interactions - 931.2  Physical Properties of Gases, Liquids and Solids
DOI:10.1117/12.2207844

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 191>

Accession number:20161102097491
Title:Underwater polarization imaging based on compressed sensing theory
Authors:Wang, Peng (1); He, Junhua (2); Lv, Pei (2)
Author affiliation:(1) Graduate School of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, China; (2) Xi&rsquo;an Institute of Optics and Precision Mechanics of CAS, Xi&rsquo;an; Shanxi, China
Corresponding author:Wang, Peng(wangpengkks@163.com)
Source title:Electronics, Communications and Networks IV - Proceedings of the 4th International Conference on Electronics, Communications and Networks, CECNet2014
Abbreviated source title:Electron. Commun. Netw. - Proc. Int. Conf. Electron. Commun. Netw.
Monograph title:Electronics, Communications and Networks IV - Proceedings of the 4th International Conference on Electronics, Communications and Networks, CECNet2014
Issue date:2015
Publication year:2015
Pages:1155-1159
Language:English
ISBN-13:9781138028302
Document type:Conference article (CA)
Conference name:4th International Conference on Electronics, Communications and Networks, CECNet2014
Conference date:December 12, 2014  -  December 15, 2014
Conference location:Beijing, China
Conference code:142839
Publisher:CRC Press/Balkema
Abstract:The present paper gives an overview of some techniques for underwater optical imaging, which employ polarization technique and Compressed Sensing theory. The schematic diagram of system has been presented. Imaging principle formulas for this imaging technique have been derived based on Compressed Sensing theory. The relationship between the target reflection with backscattering and attenuation distance has been analyzed. The theoretical limit of detection distance of the technique is about 7.4AL.The techniques of polarization imaging and signal pixel camera have been combined for signal Compressed Sensing sampling. It has a higher application value of underwater imaging along with the perceived advantages of polarization imaging and Compressed Sensing sampling. &copy; 2015 Taylor & Francis Group, London.
Number of references:17
Main heading:Underwater imaging
Controlled terms:Compressed sensing - Imaging techniques - Polarization - Schematic diagrams - Signal reconstruction
Uncontrolled terms:Imaging principle - Optical imaging - Pixel cameras - Polarization imaging - Polarization techniques - Theoretical limits
Classification code:716.1  Information Theory and Signal Processing - 746  Imaging Techniques

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 192>

Accession number:20153601250959
Title:Error analysis of electro-absorption-modulator-based depth imaging system
Authors:Zhang, Minrui (1, 2); He, Zhengquan (1); Tian, Jinshou (1); Wang, Tao (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, Xi'an; Shaanxi, China; (2) University of Chinese Academy of Sciences, Beijing, China
Source title:Guangxue Xuebao/Acta Optica Sinica
Abbreviated source title:Guangxue Xuebao
Volume:35
Issue:6
Issue date:June 10, 2015
Publication year:2015
Article number:0611004
Language:Chinese
ISSN:02532239
CODEN:GUXUDC
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:A numerical model of electro-absorption-modulator (EAM)-based time-of-flight depth system is established. A formula with scale factor is deduced to quantify the contribution of timing-error to the accuracy of system. Measurement error is studied with parameters of EAM as well as background noise and timing-error. The results show that with no timing-error the standard deviation of measurements is inversely proportional to the square root of the number of signal electrons and is proportional to the square root of the ratio of the number of background electrons to the number of signal electrons. System accuracy improved by employing EAM with high speed modulation and higher extinction ratio. With skew error increasing, measurement error rises rapidly and is difficult to be reduced by increasing the number of signal electrons in the well of sensor. The well capacity of sensor must be larger than 300 Ke and the skew error of signal must be less than &plusmn;200 ps if the accuracy of 7 m single depth image is required less than 1 cm. &copy;, 2015, Chinese Optical Society. All right reserved.
Number of references:18
Page count:7
Main heading:Electroabsorption modulators
Controlled terms:Electrons - Errors - Imaging systems - Measurement errors
Uncontrolled terms:Background noise - Extinction ratios - High-speed modulation - Measure error - Signal electrons - Standard deviation - System accuracy - Time-of-flight cameras
Classification code:701.1  Electricity: Basic Concepts and Phenomena - 731  Automatic Control Principles and Applications - 741  Light, Optics and Optical Devices - 741.3  Optical Devices and Systems - 746  Imaging Techniques - 921  Mathematics - 922  Statistical Methods
DOI:10.3788/AOS201535.0611004

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 193>

Accession number:20161502223252
Title:Theoretical and experimental research of polarization insensitive optical wavelength convertor in a photonic crystal fiber
Authors:Hu, Hui (1, 2, 3); Duan, Tao (1); Qian, Fengchen (1, 2); Huang, Xinning (1, 2); Su, Yulong (1, 2, 3); Wang, Wei (1, 2); Han, Biao (1, 2); Feng, Huan (1, 2); Xie, Xiaoping (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; Shaanxi, China; (2) University of Chinese Academy of Sciences, Beijing, China; (3) The School of Science, Xi'an Jiaotong University, Xi'an; Shaanxi, China
Corresponding author:Duan, Tao(duantao@opt.ac.cn)
Source title:Zhongguo Jiguang/Chinese Journal of Lasers
Abbreviated source title:Zhongguo Jiguang
Volume:42
Issue date:September 10, 2015
Publication year:2015
Article number:s105002
Language:English
ISSN:02587025
CODEN:ZHJIDO
Document type:Journal article (JA)
Publisher:Science Press
Abstract:A single pump polarization-insensitive and widely tunable all-optical wavelength conversion for 10 Gbit/s non-return-to-zero (NRZ) signal is experimentally demonstrated by means of four-wave-mixing (FWM) in highly nonlinear photonic crystal fiber (PCF). The residual birefringence in the 50 m dispersion-flattened guarantees the FWM-based wavelength conversion to be polarization insensitive when the pump polarization is exactly at 45&deg; to the birefringent axes of the PCF. Experimental results show that the polarization dependence of FWM in the PCF can be decreased to be less than 1 dB over 28 nm of wavelength tunable operation. The conversion efficiencies are better than -13 dB and the Q factor of idler signal is larger than 7 over the conversion range with signal polarization change. &copy; 2016, Chinese Lasers Press. All right reserved.
Number of references:15
Page count:7
Main heading:Photonic crystal fibers
Controlled terms:Birefringence - Crystal whiskers - Fiber optics - Fibers - Four wave mixing - Nonlinear optics - Optical frequency conversion - Photonic crystals - Polarization - Q factor measurement
Uncontrolled terms:All-optical wavelength conversion - Experimental research - Highly nonlinear photonic crystal fibers (PCF) - Nonreturn to zero signal - Polarization dependence - Polarization-insensitive - Residual birefringence - Signal polarization
Classification code:741  Light, Optics and Optical Devices - 933.1.1  Crystal Lattice - 942.2  Electric Variables Measurements
DOI:10.3788/CJL201542.s105002

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 194>

Accession number:20161502220367
Title:EMIF: Towards a scalable and effective indexing framework for large scale music retrieval
Authors:Shen, Jialie (1); Mei, Tao (2); Tao, Dacheng (3); Li, Xuelong (4); Rui, Yong (2)
Author affiliation:(1) Singapore Management University, Singapore, Singapore; (2) Microsoft Research Asia, Beijing, China; (3) University of Technology, Sydney, Australia; (4) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
Source title:ICMR 2015 - Proceedings of the 2015 ACM International Conference on Multimedia Retrieval
Abbreviated source title:ICMR - Proc. ACM Int. Conf. Multimed. Retr.
Monograph title:ICMR 2015 - Proceedings of the 2015 ACM International Conference on Multimedia Retrieval
Issue date:June 22, 2015
Publication year:2015
Pages:543-546
Language:English
ISBN-13:9781450332743
Document type:Conference article (CA)
Conference name:5th ACM International Conference on Multimedia Retrieval, ICMR 2015
Conference date:June 23, 2015  -  June 26, 2015
Conference location:Shanghai, China
Conference code:116836
Sponsor:ACM SIGMM; Google; Samsung; Tencent; ViSENZE
Publisher:Association for Computing Machinery, Inc
Abstract:This article presents a novel indexing framework called EMIF (Effective Music Indexing Framework) to facilitate scalable and accurate content based music retrieval. EMIF system architecture is designed based on a "classification-and-indexing" principle and consists of two main functionality layers: 1) a novel semantic-sensitive classification to identify input music's category and 2) multiple indexing structures - one local indexing structure corresponds to one semantic category. EMIF's layered architecture not only enables superior search accuracy but also reduces query response time significantly. To evaluate the system, a set of comprehensive experimental studies have been carried out using large test collection and EMIF demonstrates promising performance over state-of-theart approaches. Copyright &copy; 2015 ACM.
Number of references:17
DOI:10.1145/2671188.2749346

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 195>

Accession number:20152600979189
Title:Analysis the influence of pyramidal error on the encoder accuracy test by using coordinate transformation
Authors:Tian, Liude (1, 2); Liu, Chaohui (1); Zhao, Jianke (1); Duan, Yaxuan (1, 2); Pan, Liang (1); Zhao, Huaixue (1); Long, Jiangbo (1); Zhou, Yan (1); Li, Kun (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; Shaanxi, China; (2) University of Chinese Academy of Sciences, Beijing, China
Source title:Guangxue Xuebao/Acta Optica Sinica
Abbreviated source title:Guangxue Xuebao
Volume:35
Issue:5
Issue date:May 10, 2015
Publication year:2015
Article number:0512003
Language:Chinese
ISSN:02532239
CODEN:GUXUDC
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:In order to realize the high precision measurement of encoder accuracy, the principle and method to measure encoder accuracy by using polyhedron and autocollimator are introduced. The polyhedron coordinate system and autocollimator measurement coordinate system are established, and the precise mathematical model is established, which is relation with the measurement error of the encoder accuracy and pyramidal error. The simulation results show that the encoder shaft tilt angle and tilt direction will affect the measurement results of the encoder accuracy. Measurement error of encoder accuracy increases with encoder shaft tilt angle, and approximately proportional to the square. Measurement error of encoder accuracy changes with encoder shaft tilt direction. When encoder shaft tilt direction is 0&deg; or 180&deg;, measurement error is the smallest; When encoder shaft tilt direction is 90&deg; or 270&deg;, measurement error is the maximum. As encoder shaft tilt angle is 5&prime;, the measurement errors can reach 0.11&Prime;~0.48&Prime;, which cannot be ignored for encoder with 1~3 levels of precision grade. Pyramidal error should be cotrolled in the appropriate range based on the precision grade of measured encoder. Specific requirements on pyramidal error are given for encoders with different precision grades. &copy;, 2015, Chinese Optical Society. All right reserved.
Number of references:15
Page count:6
Main heading:Measurement errors
Controlled terms:Error analysis - Errors - Geometry - Measurements
Uncontrolled terms:Accuracy test - Angle measuring - Autocollimators - Co-ordinate system - Co-ordinate transformation - Coodinate transformation - High-precision measurement - Photoelectrical encoder
Classification code:921  Mathematics - 921.6  Numerical Methods - 922  Statistical Methods - 941  Acoustical and Optical Measuring Instruments - 942  Electric and Electronic Measuring Instruments - 943  Mechanical and Miscellaneous Measuring Instruments - 944  Moisture, Pressure and Temperature, and Radiation Measuring Instruments
DOI:10.3788/AOS201535.0512003

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 196>

Accession number:20154501514850
Title:Improvement and implementation for Canny edge detection algorithm
Authors:Yang, Tao (1, 2); Qiu, Yue-Hong (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9631
Monograph title:Seventh International Conference on Digital Image Processing, ICDIP 2015
Issue date:2015
Publication year:2015
Article number:96310H
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628418293
Document type:Conference article (CA)
Conference name:7th International Conference on Digital Image Processing, ICDIP 2015
Conference date:April 9, 2015  -  April 10, 2015
Conference location:Los Angeles, CA, United states
Conference code:115652
Publisher:SPIE
Abstract:Edge detection is necessary for image segmentation and pattern recognition. In this paper, an improved Canny edge detection approach is proposed due to the defect of traditional algorithm. A modified bilateral filter with a compensation function based on pixel intensity similarity judgment was used to smooth image instead of Gaussian filter, which could preserve edge feature and remove noise effectively. In order to solve the problems of sensitivity to the noise in gradient calculating, the algorithm used 4 directions gradient templates. Finally, Otsu algorithm adaptively obtain the dual-threshold. All of the algorithm simulated with OpenCV 2.4.0 library in the environments of vs2010, and through the experimental analysis, the improved algorithm has been proved to detect edge details more effectively and with more adaptability. &copy; 2015 SPIE.
Number of references:12
Main heading:Image processing
Controlled terms:Algorithms - Edge detection - Image enhancement - Image segmentation - Nonlinear filtering - Pattern recognition
Uncontrolled terms:Bilateral filtering - Bilateral filters - Canny edge detection - Compensation functions - Experimental analysis - Improved canny - Otsu - Pixel intensities
Classification code:716.1  Information Theory and Signal Processing
DOI:10.1117/12.2197080

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 197>

Accession number:20153701275010
Title:Soliton dynamics in a PT-symmetric optical lattice with a longitudinal potential barrier
Authors:Zhou, Keya (1, 2); Wei, Tingting (1); Sun, Haipeng (1); He, Yingji (3); Liu, Shutian (1)
Author affiliation:(1) Department of Physics, Harbin Institute of Technology, Harbin, China; (2) State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xi'an, China; (3) School of Electronics and Information, Guangdong Polytechnic Normal University, Guangzhou, China
Source title:Optics Express
Abbreviated source title:Opt. Express
Volume:23
Issue:13
Issue date:June 29, 2015
Publication year:2015
Pages:16903-16911
Language:English
E-ISSN:10944087
Document type:Journal article (JA)
Publisher:OSA - The Optical Society
Abstract:We present dynamics of spatial solitons propagating through a PT symmetric optical lattice with a longitudinal potential barrier. We find that a spatial soliton evolves a transverse drift motion after transmitting through the lattice barrier. The gain/loss coefficient of the PT symmetric potential barrier plays an essential role on such soliton dynamics. The bending angle of solitons depends on the lattice parameters including the modulation frequency, incident position, potential depth and the barrier length. Besides, solitons tend to gain a certain amount of energy from the barrier, which can also be tuned by barrier parameters. &copy; 2015 Optical Society of America.
Number of references:27
Main heading:Solitons
Controlled terms:Crystal lattices - Dynamics - Optical lattices - Optical materials
Uncontrolled terms:Bending angle - Drift motion - Modulation frequencies - Potential barriers - Soliton dynamics - Spatial solitons
Classification code:741.3  Optical Devices and Systems - 744.8  Laser Beam Interactions - 931.1  Mechanics - 931.3  Atomic and Molecular Physics - 933.1.1  Crystal Lattice
DOI:10.1364/OE.23.016903

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 198>

Accession number:4614801
Title:Spectral-Spatial Kernel Regularized for Hyperspectral Image Denoising
Authors:Yuan, Yuan (1); Zheng, Xiangtao (1); Lu, Xiaoqiang (1)
Author affiliation:(1) Center for Optical Imagery Analysis and Learning, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
Source title:IEEE Transactions on Geoscience and Remote Sensing
Abbreviated source title:IEEE Trans Geosci Remote Sens
Volume:53
Issue:7
Issue date:July 2015
Publication year:2015
Pages:3815-3832
Article number:7054493
Language:English
ISSN:01962892
CODEN:IGRSD2
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:Noise contamination is a ubiquitous problem in hyperspectral images (HSIs), which is a challenging and promising theme in many remote sensing applications. A large number of methods have been proposed to remove noise. Unfortunately, most denoising methods fail to take full advantages of the high spectral correlation and to simultaneously consider the specific noise distributions in HSIs. Recently, a spectral-spatial adaptive hyperspectral total variation (SSAHTV) was proposed and obtained promising results. However, the SSAHTV model is insensitive to the image details, which makes the edges blur. To overcome all of these drawbacks, a spectral-spatial kernel method for HSI denoising is proposed in this paper. The proposed method is inspired by the observation that the spectral-spatial information is highly redundant in HSIs, which is sufficient to estimate the clear images. In this paper, a spectral-spatial kernel regularization is proposed to maintain the spectral correlations in spectral dimension and to match the original structure between two spatial dimensions. Moreover, an adaptive mechanism is developed to balance the fidelity term according to different noise distributions in each band. Therefore, it cannot only suppress noise in the high-noise band but also preserve information in the low-noise band. The reliability of the proposed method in removing noise is experimentally proved on both simulated data and real data. &copy; 2015 IEEE.
Number of references:47
Controlled terms:correlation - data acquisition - image processing - reliability analysis - remote sensing - simulation - spatial distribution
Classification code:901  Geobase: Related Topics
DOI:10.1109/TGRS.2014.2385082

Database:GEOBASE
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 199>

Accession number:20152701006636
Title:Single-beam phase retrieval with partially coherent light
Authors:Zhou, Meiling (1); Min, Junwei (1); Gao, Peng (1); Liang, Yansheng (1); Lei, Ming (1); Yao, Baoli (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
Corresponding author:Yao, Baoli
Source title:Digital Holography and Three-Dimensional Imaging, DH 2015
Abbreviated source title:Digit. Hologr. and Three-Dimens. Imaging, DH 2015
Issue date:May 18, 2015
Publication year:2015
Pages:410p
Language:English
ISBN-13:9781557529916
Document type:Conference article (CA)
Conference name:Digital Holography and Three-Dimensional Imaging, DH 2015
Conference date:May 24, 2015  -  May 28, 2015
Conference location:Shanghai, China
Sponsor:American Elements
Publisher:Optical Society of America (OSA)
Abstract:A single-beam iterative phase retrieval method with partially coherent beam is proposed. Reference-less system make it high immunity to environmental disturbance and partially coherent light improve the image quality with low coherent noise.
Number of references:10
Main heading:Phase shifters
Controlled terms:Coherent light - Computer generated holography - Iterative methods
Uncontrolled terms:Coherent noise - Environmental disturbances - Partially coherent beam - Partially coherent light - Phase retrieval - Single beam
Classification code:703.1  Electric Networks - 723.5  Computer Applications - 741.1  Light/Optics - 921.6  Numerical Methods

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 200>

Accession number:20152200883714
Title:Narrow-linewidth double-peak figure-eight passively mode-locked fiber laser
Authors:Liu, Xianglian (1); Li, Xiaohui (2, 3); Zhang, Wei (2); Wang, Yishan (2)
Author affiliation:(1) Key Laboratory of Advanced Transducers and Intelligent Control System, College of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (3) School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu, China
Source title:Laser Physics
Abbreviated source title:Laser Phys.
Volume:25
Issue:6
Issue date:June 1, 2015
Publication year:2015
Article number:065105
Language:English
ISSN:1054660X
E-ISSN:15556611
Document type:Journal article (JA)
Publisher:Institute of Physics Publishing
Abstract:We report on the experimental observation of narrow-linewidth double-peak dissipative solitons in a figure-eight Yb-doped passively mode-locked fiber laser in the large net normal cavity dispersion regime. Without any physical bandpass filters in the cavity, stable mode-locking pulses with a duration of 416 ps and a 3 dB bandwidth of 0.3 nm can be directly generated from the laser cavity. The edge-to-edge bandwidth of the spectrum is about 5 nm. The repetition rate of the dissipative solitons is 3.9 MHz. With the increase of pump power, the central wavelength of the dissipative solitons shifts toward a short wavelength and edge-to-edge spectral widths are widened gradually. These phenomena are theoretically explained. &copy; 2015 Astro Ltd.
Number of references:33
Main heading:Mode-locked fiber lasers
Controlled terms:Bandpass filters - Bandwidth - Fiber lasers - Laser mode locking - Locks (fasteners) - Passive mode locking - Solitons
Uncontrolled terms:Central wavelength - Dissipative solitons - Figure-eight - Narrow-line width - Passively mode-locked fiber lasers - Short wavelengths - Spectral widths - Stable mode locking
Classification code:601.3  Mechanisms - 703.2  Electric Filters - 716.1  Information Theory and Signal Processing - 744.1  Lasers, General - 744.4  Solid State Lasers - 931.3  Atomic and Molecular Physics
DOI:10.1088/1054-660X/25/6/065105

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 201>

Accession number:20145300389146
Title:Tunable continuous wave and passively Q-switched Nd:LuLiF<inf>4</inf> laser with monolayer graphene as saturable absorber
Authors:Wang, Feng (1, 3); Li, Shixia (2); Li, Tao (2); Luo, Jianjun (1); Li, Ming (3)
Author affiliation:(1) School of Astronautics, Northwestern Polytechnical University, Xi'an, SHANXI, China; (2) School of Information Science and Engineering, Shandong University, Jinan, SHANDONG, China; (3) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, SHANXI, China
Source title:Laser Physics
Abbreviated source title:Laser Phys.
Volume:25
Issue:1
Issue date:January 1, 2015
Publication year:2015
Article number:015805
Language:English
ISSN:1054660X
E-ISSN:15556611
Document type:Journal article (JA)
Publisher:Institute of Physics Publishing
Abstract:Tunable continuous wave and passively Q-switched Nd:LuLiF<inf>4</inf> laser performances were demonstrated. Employing a 2 mm thick quartz plate as the birefringence filter, three continuous tuning ranges from 1045.2 to 1049.9 nm, 1051 to 1055.1 nm and 1072.1 to 1074.3 nm could be obtained. Q-switched laser operation was realized by using a monolayer graphene as a saturable absorber. At an incident pump power of 5.94 W, the maximum average output power was 669 mW with the pulse duration of 210 ns and the pulse repetition rate of 145 kHz at T = 10%.
Number of references:15
Main heading:Q switching
Controlled terms:Graphene - Monolayers - Optical pumping - Pulse repetition rate - Q switched lasers - Quartz - Saturable absorbers - Tuning
Uncontrolled terms:Average output power - Birefringence filter - Continuous operation - Continuous tuning range - Diode-pump lasers - Incident pump power - Laser performance - Passively Q-switched
Classification code:482.2  Minerals - 741.1  Light/Optics - 744.1  Lasers, General - 744.8  Laser Beam Interactions - 761  Nanotechnology - 804  Chemical Products Generally - 813.2  Coating Materials
DOI:10.1088/1054-660X/25/1/015805

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 202>

Accession number:20151100635577
Title:Design of multi-spectral images real-time segmentation system
Authors:Zhai, Bo (1); Qu, Youshan (1); Han, Yameng (1); Zhou, Jiang (1, 2)
Author affiliation:(1) Xi'an Institute of Optics and Precise Mechanics of CAS, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9449
Volume title:International Conference on Photonics and Optical Engineering, icPOE 2014
Part number:1 of 1
Issue date:2015
Publication year:2015
Article number:94492C
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628415650
Document type:Conference article (CA)
Conference name:International Conference on Photonics and Optical Engineering, icPOE 2014
Conference date:October 13, 2014  -  October 15, 2014
Conference location:Xi'an, China
Conference code:111356
Sponsor:Optics and Photonics Society of Singapore; Shaanxi Optical Society; Shaanxi Provincial Physical Society
Publisher:SPIE
Abstract:In order to realize the real-time segmentation processing of multi spectral images in practice, a real-time multi-spectral images segmentation system composed of four TMS320C6455 DSPs, two Virtex-41/4V4 XC4VLX801/4FPGAs and one Virtex-2 Pro1/4V2 Pro201/4FPGA is designed. Through the optimization of the cooperation processing of the multi DSP and multi FPGA, the parallel multitask processing ability of the DSPs and the effective interface coordination ability of the FPGAs in the built system are used fully. In order to display the processing ability, the segmentation test experiments of 10 spectra visible images, with 1024&times;1024, segmented by the Multi-scale Image Segmentation Method, was done in the built multi spectral images segment system. The experiment results prove that the multi DSP and multi FPGA multi spectral images processing system designed in this paper satisfies the real-time processing requirement in engineering practice. &copy; 2015 SPIE.
Number of references:11
Main heading:Image segmentation
Controlled terms:Digital signal processing - Image processing - Photonics - Spectroscopy
Uncontrolled terms:Multi-DSP - Multi-FPGA - Multi-scale image segmentation - Multi-spectral imagery - Parallel processing
Classification code:712  Electronic and Thermionic Materials - 717  Optical Communication - 722.4  Digital Computers and Systems - 741  Light, Optics and Optical Devices - 741.1  Light/Optics - 744  Lasers - 801  Chemistry
DOI:10.1117/12.2075966

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 203>

Accession number:20152400938851
Title:Sparse kernel entropy component analysis for dimensionality reduction of biomedical data
Authors:Shi, Jun (1); Jiang, Qikun (1); Zhang, Qi (1); Huang, Qinghua (2); Li, Xuelong (3)
Author affiliation:(1) School of Communication and Information Engineering, Shanghai University, Shanghai, China; (2) School of Electronic and Information Engineering, South China University of Technology, Guangzhou, Guangdong, China; (3) Center for OPTical IMagery Analysis and Learning (OPTIMAL), State Key Laboratory of Transient Optics and Photonics, Xi'an Inst. of Optics and Precision Mechanics. Chinese Academy of Sciences, Xi'an, Shaanxi, China
Corresponding author:Huang, Qinghua
Source title:Neurocomputing
Abbreviated source title:Neurocomputing
Volume:168
Issue date:November 30, 2015
Publication year:2015
Pages:930-940
Language:English
ISSN:09252312
E-ISSN:18728286
CODEN:NRCGEO
Document type:Journal article (JA)
Publisher:Elsevier
Abstract:Dimensionality reduction is ubiquitous in biomedical applications. A newly proposed spectral dimensionality reduction method, named kernel entropy component analysis (KECA), can reveal the structure related to Renyi entropy of an input space data set. However, each principal component in the Hilbert space depends on all training samples in KECA, causing degraded performance. To overcome this drawback, a sparse KECA (SKECA) algorithm based on a recursive divide-and-conquer (DC) method is proposed in this work. The original large and complex problem of KECA is decomposed into a series of small and simple sub-problems, and then they are solved recursively. The performance of SKECA is evaluated on four biomedical datasets, and compared with KECA, principal component analysis (PCA), kernel PCA (KPCA), sparse PCA and sparse KPCA. Experimental results indicate that the SKECA outperforms conventional dimensionality reduction algorithms, even for high order dimensional features. It suggests that SKECA is potentially applicable to biomedical data processing. &copy; 2015 Elsevier B.V.
Number of references:35
Main heading:Data reduction
Controlled terms:Data handling - Medical applications - Principal component analysis
Uncontrolled terms:Biomedical applications - Biomedical data - Component analysis - Dimensionality reduction - Dimensionality reduction algorithms - Dimensionality reduction method - Divide and conquer methods - Principal Components
DOI:10.1016/j.neucom.2015.05.032

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 204>

Accession number:20150400446909
Title:Threshold automatic selection hybrid phase unwrapping algorithm for digital holographic microscopy
Authors:Zhou, Meiling (1); Min, Junwei (1); Yao, Baoli (1); Yu, Xianghua (1); Lei, Ming (1); Yan, Shaohui (1); Yang, Yanlong (1); Dan, Dan (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xian Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xian, China
Corresponding author:Yao, Baoli
Source title:Journal of Modern Optics
Abbreviated source title:J. Mod. Opt.
Volume:62
Issue:2
Issue date:January 19, 2015
Publication year:2015
Pages:110-115
Language:English
ISSN:09500340
E-ISSN:13623044
CODEN:JMOPEW
Document type:Journal article (JA)
Publisher:Taylor and Francis Ltd.
Abstract:Conventional quality-guided (QG) phase unwrapping algorithm is hard to be applied to digital holographic microscopy because of the long execution time. In this paper, we present a threshold automatic selection hybrid phase unwrapping algorithm that combines the existing QG algorithm and the flood-filled (FF) algorithm to solve this problem. The original wrapped phase map is divided into high- and low-quality sub-maps by selecting a threshold automatically, and then the FF and QG unwrapping algorithms are used in each level to unwrap the phase, respectively. The feasibility of the proposed method is proved by experimental results, and the execution speed is shown to be much faster than that of the original QG unwrapping algorithm. &copy; 2014 Taylor & Francis.
Number of references:17
Main heading:Algorithms
Controlled terms:Floods - Holography - Microscopic examination - Phase measurement
Uncontrolled terms:Automatic selection - Digital holographic microscopy - Execution speed - Low qualities - Phase unwrapping - Phase unwrapping algorithm - Threshold selection - Wrapped phase map
Classification code:723  Computer Software, Data Handling and Applications - 743  Holography - 746  Imaging Techniques - 914.1  Accidents and Accident Prevention - 921  Mathematics - 942.2  Electric Variables Measurements
DOI:10.1080/09500340.2014.954649

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 205>

Accession number:20152701005014
Title:Inner scale effect on scintillation index of flat-topped beam in non-Kolmogorov weak turbulence
Authors:Zeng, Zhihong (1, 2); Luo, Xiujuan (1); Xia, Aili (1); Zhang, Yu (1, 2); Cao, Bei (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences (CAS), Xi'an, China; (2) Graduate University of CAS, Beijing, China
Corresponding author:Luo, Xiujuan
Volume:54
Issue:10
Issue date:April 1, 2015
Publication year:2015
Pages:2630-2638
Language:English
ISSN:1559128X
E-ISSN:21553165
CODEN:APOPAI
Document type:Journal article (JA)
Publisher:OSA - The Optical Society
Abstract:A simpler generalized expression of irradiance fluctuation for flat-topped beams is presented based on the Born and Rytov perturbation methods. The theoretical expression of the on-axis scintillation index in non-Kolmogorov weak atmospheric optics links is developed using the generalized von K&aacute;rm&aacute;n spectrum model, and using the equivalent structure constant that is different for all power-law exponents. The effect of the inner scale on the on-axis scintillation index is examined comprehensively. It is observed that flat-topped beams happen to possess smaller scintillation indices at larger inner scale. The effects of the power law, flat-topped order, source size of the fundamental Gaussian beam, propagation distance, and wavelength are also analyzed. &copy; 2015 Optical Society of America.
Number of references:36
Main heading:Scintillation
Controlled terms:Atmospheric structure - Gaussian beams - Laser beams - Perturbation techniques
Uncontrolled terms:Flat topped beam - Perturbation method - Power law exponent - Propagation distances - Scintillation index - Structure constants - Theoretical expression - Weak turbulence
Classification code:443.1  Atmospheric Properties - 711  Electromagnetic Waves - 741.1  Light/Optics - 744.8  Laser Beam Interactions - 921  Mathematics
DOI:10.1364/AO.54.002630

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 206>

Accession number:20150500459644
Title:Targeting accurate object extraction from an image: A comprehensive study of natural image matting
Authors:Zhu, Qingsong (1, 2); Shao, Ling (3); Li, Xuelong (4); Wang, Lei (1)
Author affiliation:(1) Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China; (2) Chinese University of Hong Kong, Hong Kong, Hong Kong; (3) Department of Computer Science and Digital Technologies, Northumbria University, Newcastle upon Tyne, United Kingdom; (4) Centre for OPTical Imagery Analysis and Learning, State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xi'an, China
Corresponding author:Shao, Ling
Source title:IEEE Transactions on Neural Networks and Learning Systems
Abbreviated source title:IEEE Trans. Neural Networks Learn. Sys.
Volume:26
Issue:2
Issue date:February 1, 2015
Publication year:2015
Pages:185-207
Article number:6963376
Language:English
ISSN:2162237X
E-ISSN:21622388
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:With the development of digital multimedia technologies, image matting has gained increasing interests from both academic and industrial communities. The purpose of image matting is to precisely extract the foreground objects with arbitrary shapes from an image or a video frame for further editing. It is generally known that image matting is inherently an ill-posed problem because we need to output three images out of only one input image. In this paper, we provide a comprehensive survey of the existing image matting algorithms and evaluate their performance. In addition to the blue screen matting, we systematically divide all existing natural image matting methods into four categories: 1) color sampling-based; 2) propagation-based; 3) combination of sampling-based and propagation-based; and 4) learning-based approaches. Sampling-based methods assume that the foreground and background colors of an unknown pixel can be explicitly estimated by examining nearby pixels. Propagation-based methods are instead based on the assumption that foreground and background colors are locally smooth. Learning-based methods treat the matting process as a supervised or semisupervised learning problem. Via the learning process, users can construct a linear or nonlinear model between the alpha mattes and the image colors using a training set to estimate the alpha matte of an unknown pixel without any assumption about the characteristics of the testing image. With three benchmark data sets, the various matting algorithms are evaluated and compared using several metrics to demonstrate the strengths and weaknesses of each method both quantitatively and qualitatively. Finally, we conclude this paper by outlining the research trends and suggesting a number of promising directions for future development. &copy; 2012 IEEE.
Number of references:121
Main heading:Image segmentation
Controlled terms:Color - Feature extraction - Image processing - Learning systems - Multimedia systems - Pixels - Surveying - Surveys
Uncontrolled terms:Alpha mattes - Digital multimedia technologies - evaluation - Image composition - Image matting - Learning-based approach - Learning-based methods - Semi- supervised learning
Classification code:405.3  Surveying - 723.5  Computer Applications - 741  Light, Optics and Optical Devices - 741.1  Light/Optics
DOI:10.1109/TNNLS.2014.2369426

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 207>

Accession number:20151900820490
Title:Carrier-envelope phase measurement with linear optical sampling
Authors:Li, Feitao (1, 2); Hu, Hui (1, 2, 3); Zhao, Wei (1, 2); Liu, Yuanshan (1, 2)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) Graduate School of Chinese Academy of Sciences, Beijing, China; (3) School of Science, Xi'An Jiaotong University, Xi'an, China
Source title:IEEE Photonics Journal
Abbreviated source title:IEEE Photon. J.
Volume:7
Issue:3
Issue date:June 1, 2015
Publication year:2015
Article number:7081341
Language:English
ISSN:19430655
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:In the few-cycle pulses, the temporal evolution of the electric field sensitively depends on the carrier-envelope phase (CEP). The ability to measure and stabilize the CEP therefore becomes a crucial issue for all applications. However, few studies are focused on the measurement of CEP with coherent linear optical sampling. We propose an efficient method to measure the CEP of the frequency comb pulses by employing a high-resolution linear optical sampling technique. It is shown that constant chirp and pulsewidth of frequency comb pulses have negligible effect on the CEP measurement. &copy; 2009-2012 IEEE.
Number of references:23
Main heading:Phase measurement
Controlled terms:Electric fields - Signal processing
Uncontrolled terms:Carrier-envelope phase - Carrier-envelope phase measurement - Few-cycle pulse - Fourier optics and signal processing - Frequency combs - Linear optical sampling - Optical sampling - Temporal evolution
Classification code:701.1  Electricity: Basic Concepts and Phenomena - 716.1  Information Theory and Signal Processing - 942.2  Electric Variables Measurements
DOI:10.1109/JPHOT.2015.2420688

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 208>

Accession number:20155201732469
Title:Single-beam phase retrieval with partially coherent light illumination
Authors:Zhou, Meiling (1); Min, Junwei (1); Gao, Peng (1); Liang, Yansheng (1); Lei, Ming (1); Yao, Baoli (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
Source title:Journal of Optics (United Kingdom)
Abbreviated source title:J. Opt.
Volume:18
Issue:1
Issue date:November 24, 2015
Publication year:2015
Article number:015701
Language:English
ISSN:20408978
E-ISSN:20408986
Document type:Journal article (JA)
Publisher:Institute of Physics Publishing
Abstract:A single-beam phase retrieval method with partially coherent illumination is proposed. By using an obverse and reverse iterative (ORI) algorithm, objects can be reconstructed within less time by recording a sequence of diffraction patterns at different axial planes under partially coherent light illumination. Partially coherent light illumination reduces coherent noise and the number of diffraction patterns needed for reconstruction. Thus, the whole process is fast and has high immunity to external perturbation due to the reference-less configuration. Both simulation and experimental results are presented to demonstrate the feasibility of the proposed approach. &copy; 2016 IOP Publishing Ltd.
Number of references:18
Main heading:Iterative methods
Controlled terms:Algorithms - Coherent light - Diffraction - Diffraction patterns - Interferometry - Phase shifters
Uncontrolled terms:Axial planes - Coherent noise - External perturbations - Iterative algorithm - Partially coherent illumination - Partially coherent light - Phase retrieval - Whole process
Classification code:713.5  Electronic Circuits Other Than Amplifiers, Oscillators, Modulators, Limiters, Discriminators or Mixers - 741.1  Light/Optics - 921.6  Numerical Methods - 941.4  Optical Variables Measurements
DOI:10.1088/2040-8978/18/1/015701

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 209>

Accession number:20153501225645
Title:A new design of seed source used in optical streak camera
Authors:Wang, Qiaoli (1, 2); Bai, Yonglin (1); Zhu, Bingli (1); Wang, Bo (1); Gou, Yongsheng (1); Jin, Jing (1, 2)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China
Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering
Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.
Volume:44
Issue:7
Issue date:July 25, 2015
Publication year:2015
Pages:2122-2126
Language:English
ISSN:10072276
Document type:Journal article (JA)
Publisher:Chinese Society of Astronautics
Abstract:A new technique to generate high frequency repeated sine synchronous scan seed source was introduced, based on the method of phase locked loop and direct digital synthesize technique. Phase locked loop was used to realize synchronous track of sine scan signal and trigger light impulse. Modulation of frequency, phase, and amplitude was achieved by direct digital synthesize technique. Delay of scan time was achieved by phase modulation, while different scanning rate was achieved by amplification modulation. The circuit system can obtain stable sine synchronous scan seed signal with frequency as high as 250 MHz, and jitter lower than 10 ps. The design is confirmed to meet the expectation, and fulfill the high precision requirements of streak camera on seed source for frequency, amplitude and time jitter. &copy;, 2015, Chinese Society of Astronautics. All right reserved.
Number of references:10
Main heading:Jitter
Controlled terms:Locks (fasteners) - Modulation - Phase locked loops - Phase modulation - Streak cameras - Timing jitter
Uncontrolled terms:Circuit systems - Direct digital synthesize - High frequency HF - High-precision - Optical streak cameras - Scanning rate - Synchronous scan - Time jitters
Classification code:601.3  Mechanisms - 713.5  Electronic Circuits Other Than Amplifiers, Oscillators, Modulators, Limiters, Discriminators or Mixers - 716  Telecommunication; Radar, Radio and Television - 717  Optical Communication - 718  Telephone Systems and Related Technologies; Line Communications - 742.2  Photographic Equipment

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 210>

Accession number:20152901043463
Title:InGaAs-MSM photodetector with low dark current
Authors:Yan, Xin (1, 3); Wang, Tao (1); Yin, Fei (1); Ni, Hai-Qiao (2); Niu, Zhi-Chuan (2); Xin, Li-Wei (1); Tian, Jin-Shou (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Technology, Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an, China; (2) Institute of Semiconductors, Chinese Academy of Sciences, Beijing, China; (3) University of Chinese Academy of Sciences, Beijing, China
Corresponding author:Wang, Tao
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:44
Issue:6
Issue date:June 1, 2015
Publication year:2015
Article number:0604002
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:MSM (Mental-Semiconductor-Mental) photodetector has been widely used for its low capacitance and high bandwidth. For example, it can be used for space communication, remote sense and so on. But the development of MSM devices is still hindered by the dark current. In this paper, the 100&times;100 &mu;m&lt;sup&gt;2&lt;/sup&gt; InGaAs-MSM photodetector is successfully fabricated. The dark current density is reduced to 0.6 pA/&mu;m&lt;sup&gt;2&lt;/sup&gt; (5 V) by designing InAlGaAs/InGaAs short period superlattices and InAlAs Schottky barrier enhancement and this improves the SNR. Parameters of the device are characterized as follows: the 3dB bandwidth is 6.8 GHz, the rise time is 58.8 ps, the responsibility is 0.55 A/W at 1550 nm and the external quantum efficiency of the absorption region is 88%. Inhibition mechanisms of the short period superlattices and Schottky barrier enhancement are analyzed. &copy;, 2015, Chinese Optical Society. All right reserved.
Number of references:13
Page count:5
Main heading:Semiconductor superlattices
Controlled terms:Bandwidth - Dark currents - Metallorganic chemical vapor deposition - Photodetectors - Photons - Remote sensing - Schottky barrier diodes - Semiconducting indium - Semiconductor devices - Superlattices
Uncontrolled terms:Absorption region - External quantum efficiency - InGaAs - Inhibition mechanisms - MSM - Schottky barriers - Short period superlattice - Space communications
Classification code:531  Metallurgy and Metallography - 701.1  Electricity: Basic Concepts and Phenomena - 712.1.1  Single Element Semiconducting Materials - 714.2  Semiconductor Devices and Integrated Circuits - 716.1  Information Theory and Signal Processing - 731.1  Control Systems - 741.1  Light/Optics - 802.2  Chemical Reactions
DOI:10.3788/gzxb20154406.0604002

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 211>

Accession number:20150600488140
Title:F-state based permanent optical data storage in bacteriorhodopsin film
Authors:Yu, Xiang-Hua (1); Yao, Bao-Li (1); Li, Xin-Yu (2); Liu, Shi-Lei (2); Lei, Ming (1); Li, Run-Ze (1); Liang, Yan-Sheng (1); Zhou, Xing (1); Wu, Di (1); Dan, Dan (1); Min, Jun-Wei (1); Yan, Shao-Hui (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) Security Printing Institute of People's Bank of China, Beijing, China
Corresponding author:Yao, Bao-Li
Source title:Wuli Xuebao/Acta Physica Sinica
Abbreviated source title:Wuli Xuebao
Volume:64
Issue:2
Issue date:January 20, 2015
Publication year:2015
Article number:024218
Language:Chinese
ISSN:10003290
CODEN:WLHPAR
Document type:Journal article (JA)
Publisher:Institute of Physics, Chinese Academy of Sciences
Abstract:Upon excitation of high intensity linearly polarized femtosecond laser, a blue-shifted two-photon induced photoproduct named F540 state with permanent photo-induced anisotropy is observed in bacteriorhodopsin (BR) films. Based on the F-state, permanent optical data storage can be realized with spatial field modulation of femtosecond laser. By using a phase-only spatial light modulator to modulate the spatial phase distribution of the incident femtosecond laser beam, we generate spot-patterns in the focal plane of the microscopic objective lens, and the patterns are recorded in the BR film. At the same time, by varying the polarization direction of the excitation laser beam, polarization-multiplexed optical data storage in the BR film is demonstrated, which is applicable to high-density optical data storage and optical information encryption. &copy; 2015 Chinese Physical Society.
Number of references:23
Page count:6
Main heading:Optical data storage
Controlled terms:Data storage equipment - Digital storage - Excited states - Laser beams - Laser excitation - Light modulation - Light modulators - Modulation - Polarization - Ultrashort pulses
Uncontrolled terms:Bacteriorhodopsin - Bacteriorhodopsin films - High density optical data storage - Optical information - Photo-induced anisotropy - Polarization direction - Spatial light modulation - Spatial light modulators
Classification code:716  Telecommunication; Radar, Radio and Television - 717  Optical Communication - 717.2  Optical Communication Equipment - 718  Telephone Systems and Related Technologies; Line Communications - 722.1  Data Storage, Equipment and Techniques - 741.1  Light/Optics - 741.3  Optical Devices and Systems - 744  Lasers - 931.3  Atomic and Molecular Physics
DOI:10.7498/aps.64.024218

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 212>

Accession number:20153001051142
Title:Improving coherent field imaging quality by suppressing the influence of transmitting aperture spacing error
Authors:Cheng, Zhi-Yuan (1, 2); Ma, Cai-Wen (1); Luo, Xiu-Juan (1); Zhang, Yu (1, 2); Zhu, Xiang-Ping (1, 2); Xia, Ai-Li (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China
Corresponding author:Luo, Xiu-Juan
Source title:Wuli Xuebao/Acta Physica Sinica
Abbreviated source title:Wuli Xuebao
Volume:64
Issue:12
Issue date:June 20, 2015
Publication year:2015
Article number:124203
Language:Chinese
ISSN:10003290
CODEN:WLHPAR
Document type:Journal article (JA)
Publisher:Institute of Physics, Chinese Academy of Sciences
Abstract:Coherent field imaging is based on the assumption of equal transmitting apertures spacing and equal spectrum of laser, and high-resolution image is reconstructed by iteratively computing the frequency spectrum. However, the inevitable transmitting aperture spacing error of laser is a key factor to affect the coherent field imaging quality in the application. Aiming at the problem of degrading imaging quality caused by the transmitting aperture spacing error, we discuss the mechanism of influence of aperture spacing error on imaging quality and propose a novel method of improving imaging quality from the perspective of suppressing the influence of transmitting aperture spacing error. Firstly, the mechanism of the influence of aperture spacing error on imaging quality and laser echo spectrum is analyzed in detail. Then we derive a frequency spectrum error propagation model. Based on the model, the iterative effect of frequency spectrum error is investigated and the trend of variation in imaging quality with frequency spectrum error is given. We propose a theoretical equation, in which the transmitting aperture spacing error has no influence on frequency spectrum nor imaging quality. To solve the above equation, an optimized method of linear programming is proposed and the optimized matrix of aperture spacing error is obtained. In practice, the influence of aperture spacing error on imaging quality can be largely counteracted by reasonably allocating aperture spacing error according to the optimized spacing error matrix. The correctness and validity of the theoretical model are verified by a simulation experiment. The results show that the Strehl ratio of imaging quality index can be improved by about 100% through using the proposed method, the greater the aperture spacing error, the higher the Strehl ratio of imaging quality index obtained by the method will be. In addition, the method is easy to use practically and less costly as well. Finally, it is concluded that the proposed method can easily and effectively counteract the degrading effect of aperture spacing error on imaging quality. The research can provide a theoretical basis for improving imaging quality and reasonably assigning transmitter aperture spacing accuracy of coherent field imaging telescope. &copy;, 2015, Chinese Physical Society. All right reserved.
Number of references:16
Page count:8
Main heading:Errors
Controlled terms:Iterative methods - Linear programming - Matrix algebra - Spectroscopy
Uncontrolled terms:Aperture spacing - Coherent fields - Error propagation model - Frequency spectra - High resolution image - Imaging quality - Theoretical equation - Theoretical modeling
Classification code:731  Automatic Control Principles and Applications - 801  Chemistry - 921  Mathematics - 922  Statistical Methods
DOI:10.7498/aps.64.124203

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 213>

Accession number:20152701006766
Title:Real-time visualization of fluidic field using point-diffraction digital holographic interferometry
Authors:Min, Junwei (1); Gao, Peng (1); Guo, Rongli (1); Zhou, Meiling (1); Yao, Baoli (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
Corresponding author:Yao, Baoli
Source title:Digital Holography and Three-Dimensional Imaging, DH 2015
Abbreviated source title:Digit. Hologr. and Three-Dimens. Imaging, DH 2015
Issue date:May 18, 2015
Publication year:2015
Pages:410p
Language:English
ISBN-13:9781557529916
Document type:Conference article (CA)
Conference name:Digital Holography and Three-Dimensional Imaging, DH 2015
Conference date:May 24, 2015  -  May 28, 2015
Conference location:Shanghai, China
Sponsor:American Elements
Publisher:Optical Society of America (OSA)
Abstract:The dynamic fusion process of two different fluidic fields is visualized and quantitatively analyzed by using common-path point-diffraction digital holographic interferometry. The measurement results are compared with that from other techniques, verifying the practicability of the proposed method.
Number of references:10
Main heading:Holographic interferometry
Controlled terms:Computer generated holography - Diffraction - Holography - Interferometry
Uncontrolled terms:Common path - Digital holographic interferometry - Dynamic fusion - Point diffraction - Real time visualization
Classification code:711.1  Electromagnetic Waves in Different Media - 743  Holography - 743.1  Holographic Techniques - 746  Imaging Techniques - 941.4  Optical Variables Measurements

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 214>

Accession number:20152400935224
Title:Active control of beams by metallic nanoslit array lens with movable dielectric substrate
Authors:Jia, Sen (1); Wang, Xianhua (1); Wu, Yiming (1); Xiao, Maosen (1); Fan, Pengge (1); Wang, Zhiyong (2)
Author affiliation:(1) Optical Directional and Precise Measurement Technique Research Center, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) Xi'an Aerospace Power Measurement and Control Technology Institute, Xi'an, China
Corresponding author:Jia, Sen
Source title:Applied Physics Express
Abbreviated source title:Appl. Phys. Express
Volume:8
Issue:6
Issue date:June 1, 2015
Publication year:2015
Article number:062001
Language:English
ISSN:18820778
E-ISSN:18820786
Document type:Journal article (JA)
Publisher:Japan Society of Applied Physics
Abstract:We proposed a plasmonic structure consisting of uniform metallic nanoslits with a movable dielectric substrate for subwavelength beam manipulation. In this structure, the phase of incident light can be modulated beforehand by the substrate before bumping the metal slits; therefore, the shape of transmitted light from nanoslits can be actively controlled by changing the substrate profile. According to this idea, plasmonic lenses with different functions, such as focusing light to two points, focus length variation, and beam deflection, are designed and investigated numerically. The proposed structure has a unique advantage of multifunction and reduces the difficulty in fabrication. &copy; 2015 The Japan Society of Applied Physics.
Number of references:25
Main heading:Dielectric materials
Controlled terms:Nanostructures - Plasmons - Substrates
Uncontrolled terms:Beam deflection - Beam manipulations - Dielectric substrates - Length variations - Metallic nanoslit arrays - Sub-wavelength - Substrate profile - Transmitted light
Classification code:461  Bioengineering and Biology - 708.1  Dielectric Materials - 712.1  Semiconducting Materials - 761  Nanotechnology - 801  Chemistry - 933  Solid State Physics
DOI:10.7567/APEX.8.062001

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 215>

Accession number:20161202125478
Title:Scanning stereomicroscopy with two-photon excitation and scanned Bessel beams
Authors:Yang, Yanlong (1); Zhou, Xing (1); Li, Runze (1); Peng, Tong (1); Lei, Ming (1); Wu, Di (1); Yao, Baoli (1); Van Horn, Mark (2); Chen, Xun (2); Ye, Tong (2)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) Department of Bioengineering, Center for Optical Materials Science and Engineering Technologies (COMSET), Clemson University, CU-MUSC, Charleston; SC, United States
Source title:2015 Opto-Electronics and Communications Conference, OECC 2015
Abbreviated source title:Opto-Electron. Commun. Conf., OECC
Monograph title:2015 Opto-Electronics and Communications Conference, OECC 2015
Issue date:November 30, 2015
Publication year:2015
Article number:7340281
Language:English
ISBN-13:9781467379441
Document type:Conference article (CA)
Conference name:Opto-Electronics and Communications Conference, OECC 2015
Conference date:June 28, 2015  -  July 2, 2015
Conference location:Shanghai, China
Conference code:118434
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:Bessel beams have been used in many applications due to their unique optical properties of maintaining their intensity profiles unchanged during propagation. In imaging applications, Bessel beams have been successfully used to provide extended focuses for volumetric imaging and uniformed illumination plane in light-sheet microscopy. Coupled with two-photon excitation, Bessel beams have been successfully used in realizing fluorescence projected volumetric imaging. We demonstrated previously a stereoscopic solution-two-photon fluorescence stereomicroscopy (TPFSM)-for recovering the depth information in volumetric imaging with Bessel beams. In TPFSM, tilted Bessel beams were used to generate stereoscopic images on a laser scanning two-photon fluorescence microscope; upon post image processing we could successfully provide 3D perception of acquired volume images by wearing anaglyph 3D glasses. However, tilted Bessel beams were generated by shifting either an axicon or an objective laterally; the slow imaging speed and severe aberrations made it hard to use in real-time volume imaging. In this article, we report recent improvements of TPFSM with newly designed scanner and imaging software, which allows 3D stereoscopic imaging without moving any of the optical components on the setup. This improvement has dramatically improved focusing qualities and imaging speed so that the TPFSM can be performed potentially in real-time to provide 3D visualization in scattering media without post image processing. &copy; 2015 IEEE.
Number of references:9
Main heading:Image processing
Controlled terms:Bessel functions - Fluorescence - Geometrical optics - Laser beams - Optical data processing - Optical properties - Photons - Stereo image processing - Three dimensional computer graphics
Uncontrolled terms:Bessel beam - Extended depth of field - Light-sheet microscopies - Post-image processing - Stereoscopic solution - Two photon fluorescence - Two-photon excitations - Volumetric Imaging
Classification code:723.2  Data Processing and Image Processing - 741.1  Light/Optics - 744.8  Laser Beam Interactions - 921  Mathematics - 931.3  Atomic and Molecular Physics
DOI:10.1109/OECC.2015.7340281

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 216>

Accession number:20155201719144
Title:A design of digital processing circuit for the duo-lateral PSD
Authors:Zhou, Weixiang (1, 2); Liang, Yanbing (1); Wang, Xiaoyang (1, 2)
Author affiliation:(1) Photoelectric Measurment and Control Technology Research Dept., Xi'An Institute of Optics and Precision Mechanics of CAS, Xi'an, China; (2) University of Chinese Academy of Science, Beijing, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9674
Monograph title:AOPC 2015: Optical and Optoelectronic Sensing and Imaging Technology
Issue date:2015
Publication year:2015
Article number:96741S
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628418996
Document type:Conference article (CA)
Conference name:Applied Optics and Photonics, China: Optical and Optoelectronic Sensing and Imaging Technology, AOPC 2015
Conference date:May 5, 2015  -  May 7, 2015
Conference location:Beijing, China
Conference code:117013
Sponsor:Chinese Society for Optical Engineering
Publisher:SPIE
Abstract:Beam pointing stability control technology detecting the vibration of the optical platform by detectors, using the fast steering mirror compensated the vibration displacement, thereby maintaining a stable beam. Position Sensitive Detector (PSD) as a sensitive position detection system components, its performance significantly affect the overall accuracy of the test system. This article selects Sitek's two-dimensional duo-lateral PSD: 2L20-CP7. By analyzing the measurement principle of the PSD, we designed a reverse bias circuit, I-V converted circuit, A/D converted circuit and control circuit which FPGA as a controller, testing the output current value to verify the reasonableness of the circuit design, and calculate the location information according to formula. We also made a measured grid chart diagram and distortion based on the application of computer, so dose error analysis. We concluded that the linearity of this PSD is better, and it can be applied in the high-precision systems. &copy; 2015 SPIE.
Number of references:7
Main heading:Integrated circuit manufacture
Controlled terms:Analog to digital conversion - Detectors - Distortion (waves) - Field programmable gate arrays (FPGA) - Imaging techniques - Optical sensors
Uncontrolled terms:duo-lateral - Fast steering mirror - High precision systems - linearity - Position detection systems - Position-Sensitive Detectors - stable - Vibration displacements
Classification code:714.2  Semiconductor Devices and Integrated Circuits - 721.2  Logic Elements - 741.3  Optical Devices and Systems - 746  Imaging Techniques
DOI:10.1117/12.2199670

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 217>

Accession number:20152200898402
Title:A Survey of Sparse Representation: Algorithms and Applications
Authors:Zhang, Zheng (1, 2); Xu, Yong (1, 2); Yang, Jian (3); Li, Xuelong (4); Zhang, David (5)
Author affiliation:(1) Bio-Computing Research Center, Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen, China; (2) Key Laboratory of Network Oriented Intelligent Computation, Shenzhen, China; (3) College of Computer Science and Technology, Nanjing University of Science and Technology, Nanjing, China; (4) State Key Laboratory of Transient Optics and Photonics, Center for Optical Imagery Analysis and Learning, Chinese Academy of Sciences, Xi'an, Shaanxi, China; (5) Biometrics Research Center, Hong Kong Polytechnic University, Hong Kong
Corresponding author:Xu, Yong
Source title:IEEE Access
Abbreviated source title:IEEE Access
Volume:3
Issue date:2015
Publication year:2015
Pages:490-530
Article number:7102696
Language:English
E-ISSN:21693536
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:Sparse representation has attracted much attention from researchers in fields of signal processing, image processing, computer vision, and pattern recognition. Sparse representation also has a good reputation in both theoretical research and practical applications. Many different algorithms have been proposed for sparse representation. The main purpose of this paper is to provide a comprehensive study and an updated review on sparse representation and to supply guidance for researchers. The taxonomy of sparse representation methods can be studied from various viewpoints. For example, in terms of different norm minimizations used in sparsity constraints, the methods can be roughly categorized into five groups: 1) sparse representation with $l-{0}$ -norm minimization; 2) sparse representation with $l-{p}$ -norm ( $0&lt;p&lt;1$ ) minimization; 3) sparse representation with $l-{1}$ -norm minimization; 4) sparse representation with $l-{2,1}$ -norm minimization; and 5) sparse representation with $l-{2}$ -norm minimization. In this paper, a comprehensive overview of sparse representation is provided. The available sparse representation algorithms can also be empirically categorized into four groups: 1) greedy strategy approximation; 2) constrained optimization; 3) proximity algorithm-based optimization; and 4) homotopy algorithm-based sparse representation. The rationales of different algorithms in each category are analyzed and a wide range of sparse representation applications are summarized, which could sufficiently reveal the potential nature of the sparse representation theory. In particular, an experimentally comparative study of these sparse representation algorithms was presented. &copy; 2013 IEEE.
Number of references:219
Main heading:Approximation algorithms
Controlled terms:Algorithms - Compressed sensing - Computer vision - Constrained optimization - Image processing - Pattern recognition - Signal processing
Uncontrolled terms:Compressive sensing - Dictionary learning - Greedy algorithms - Homotopy algorithms - Proximal algorithm - Sparse representation
Classification code:716  Telecommunication; Radar, Radio and Television - 716.1  Information Theory and Signal Processing - 741  Light, Optics and Optical Devices - 741.2  Vision - 921  Mathematics - 961  Systems Science
DOI:10.1109/ACCESS.2015.2430359

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 218>

Accession number:20155101703322
Title:Performance analysis of compressive ghost imaging based on different signal reconstruction techniques
Authors:Kang, Yan (1); Yao, Yin-Ping (1); Kang, Zhi-Hua (2); Ma, Lin (2); Zhang, Tong-Yi (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) School of Physics and Optoelectronic Engineering, Xidian University, Xi'an, China
Corresponding author:Zhang, Tong-Yi(tyzhang@opt.ac.cn)
Source title:Journal of the Optical Society of America A: Optics and Image Science, and Vision
Abbreviated source title:J Opt Soc Am A
Volume:32
Issue:6
Issue date:June 2015
Publication year:2015
Pages:1063-1067
Language:English
ISSN:10847529
E-ISSN:15208532
CODEN:JOAOD6
Document type:Journal article (JA)
Publisher:OSA - The Optical Society
Abstract:We present different signal reconstruction techniques for implementation of compressive ghost imaging (CGI). The different techniques are validated on the data collected from ghost imaging with the pseudothermal light experimental system. Experiment results show that the technique based on total variance minimization gives high-quality reconstruction of the imaging object with less time consumption. The different performances among these reconstruction techniques and their parameter settings are also analyzed. The conclusion thus offers valuable information to promote the implementation of CGI in real applications. &copy; 2015 Optical Society of America.
Number of references:28
Main heading:Image reconstruction
Controlled terms:Image processing - Imaging techniques - Signal analysis - Signal reconstruction
Uncontrolled terms:Experimental system - High quality reconstruction - Parameter setting - Performance analysis - Pseudothermal light - Real applications - Reconstruction techniques - Time consumption
Classification code:716.1  Information Theory and Signal Processing - 746  Imaging Techniques
DOI:10.1364/JOSAA.32.001063

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 219>

Accession number:20155101686148
Title:Exposure time control of large aperture static imaging spectrometer
Authors:Yang, Yang (1, 2); Liu, Xue-Bin (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China
Corresponding author:Liu, Xue-Bin(lxb@opt.ac.cn)
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:44
Issue:11
Issue date:November 1, 2015
Publication year:2015
Article number:1123004
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:The method of CCD exposure time control based on driver timing was proposed for the situation of the high performance CCD imaging detector without electronic shutter. The charge will be drained quickly in the excess period by increasing the charge excretion state after the horizental readout under the certain frame frequency. It can control the CCD exposure time effectively, and overcome the problem the CCD minimum exposure time is equal to the readout time. Results show that the booming resistance of the large aperture static imaging spectrometer is well improved and the non-linearity of the method is 4.61%. &copy; 2015, Chinese Optical Society. All right reserved.
Number of references:14
Page count:6
Main heading:Spectrometers
Controlled terms:Charge coupled devices - Control - Physiology
Uncontrolled terms:CCD imaging - Charge excretion - Driver timing - Electronic shutters - Exposure-time - Large aperture - Readout time - Static imaging
Classification code:461.9  Biology - 714.2  Semiconductor Devices and Integrated Circuits - 741.3  Optical Devices and Systems
DOI:10.3788/gzxb20154411.1123004

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 220>

Accession number:20154601551446
Title:Design and testing of infrared diffractive telescope imaging optical systems
Authors:Zhang, Zhoufeng (1, 2, 3); Xie, Yongjun (1); Yin, Qinye (2); Kang, Fuzeng (1)
Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) Xi'An Jiaotong University, Xi'an, China; (3) Graduate University of Chinese Academy of Sciences, China
Corresponding author:Zhang, Zhoufeng(jczzf@163.com)
Source title:Optik
Abbreviated source title:Optik
Volume:126
Issue:24
Issue date:December 2015
Publication year:2015
Pages:5740-5743
Language:English
ISSN:00304026
Document type:Journal article (JA)
Publisher:Elsevier GmbH
Abstract:Diffractive telescope is an updated imaging technology, it differs from conventional refractive and reflective imaging system, which is based on the principle of diffraction image. However, one of the great challenges of design this optical system is that the diffractive optical element focuses on different wavelengths of light at different points in space, thereby distorting the color characteristics of image. In this paper, we designs a long-wavelength infrared diffractive telescope imaging system with flat surface Fresnel lens and cancels the infrared optical system chromatic aberration by another flat surface Fresnel lens, achieving broadband light (from 8 &mu;m to 12 &mu;m) to a common focus. At last, the diffuse spot size and MTF function provide diffractive-limited performance. &copy; 2015 Elsevier GmbH. All rights reserved.
Number of references:13
Main heading:Optical systems
Controlled terms:Aberrations - Design - Imaging systems - Imaging techniques - Infrared radiation - Lenses - Optical instrument lenses - Telescopes
Uncontrolled terms:Chromatic aberration - Color characteristics - Color correction - Diffraction images - Imaging optical systems - Imaging technology - Infrared optical systems - Long-wavelength infrared
Classification code:741.1  Light/Optics - 741.3  Optical Devices and Systems - 746  Imaging Techniques
DOI:10.1016/j.ijleo.2015.09.079

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 221>

Accession number:20153801287490
Title:High-power Ho:YAG laser wing-pumped by a Tm:fiber laser at 1933 nm
Authors:Zhao, T. (1); Wang, F. (2, 3); Shen, D.Y. (1)
Author affiliation:(1) Department of Optical Science and Engineering, Fudan University, Shanghai, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi' An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (3) University of Chinese Academy of Sciences, Beijing, China
Corresponding author:Shen, D.Y.
Volume:54
Issue:7
Issue date:March 1, 2015
Publication year:2015
Pages:1594-1597
Language:English
ISSN:1559128X
E-ISSN:21553165
CODEN:APOPAI
Document type:Journal article (JA)
Publisher:OSA - The Optical Society
Abstract:We report on the high-power and efficient operation of a Ho:YAG laser wing-band-pumped by a Tm:fiber laser at 1933 nm. Using an output coupler of 10% transmission, maximum continuous-wave (CW) output power of 24.2 W at 2124 nm was generated under 42.6 W of absorbed pump power, corresponding to slope efficiency with respect to absorbed pump power of 57.6%. The operating wavelength of the Ho:YAG laser centered at 2092 or 2124 nm depending on different resonator designs. Prospects for further improvement in laser performance with this wing-pump configuration are discussed. &copy; 2015 Optical Society of America.
Number of references:19
Main heading:Pumping (laser)
Controlled terms:Fiber lasers
Uncontrolled terms:Absorbed pump power - Continuous wave output power - Laser performance - Operating wavelength - Output couplers - Pump configuration - Resonator design - Slope efficiencies
Classification code:744.1  Lasers, General - 744.4  Solid State Lasers
DOI:10.1364/AO.54.001594

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 222>

Accession number:20160201801886
Title:Feature competition and partial sparse shape modeling for cardiac image sequences segmentation
Authors:Qin, Xianjing (1, 2); Tian, Yan (1); Yan, Pingkun (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, Shaanxi, China; (2) University of Chinese Academy of Sciences, China
Corresponding author:Yan, Pingkun(pingkun@ieee.org)
Source title:Neurocomputing
Abbreviated source title:Neurocomputing
Volume:149
Issue date:2015
Publication year:2015
Pages:904-913
Language:English
ISSN:09252312
E-ISSN:18728286
CODEN:NRCGEO
Document type:Journal article (JA)
Publisher:Elsevier
Abstract:The segmentation of endocardium and epicardium of left ventricle (LV) in cardiac MR image sequences play a crucial role in clinical applications. Active shape model (ASM) based methods are often used to extract the LV boundaries with the steps of searching and representation. However, due to the challenges, such as interior papillary muscles, complicated outside tissues and weak boundaries, the searching may be partially incorrect and the representation cannot reflect the reliable part of the contour. In this paper, a feature competition based searching strategy is proposed by exploiting both the information of the object and background to reduce the error of searching. Then, we propose a partial sparse shape model to effectively represent the searched shape. This representation is able to retain the partial reliable contour while reconstructing the unreliable part approximating to the real contour. Moreover, the incremental learning algorithm is exploited to construct a patient-specific appearance model to increase the accuracy and efficiency of image sequence segmentation. Experimental results on cardiac MR image sequences demonstrate that the proposed method improves the segmentation performance and also reduces the error accumulation compared to the existing methods. &copy; 2014 Elsevier B.V.
Number of references:26
Main heading:Image segmentation
Controlled terms:Computer vision - Face recognition - Heart - Learning algorithms - Magnetic resonance imaging
Uncontrolled terms:Active shape model - Appearance modeling - Clinical application - Error accumulation - Image sequence - Incremental learning - Segmentation performance - Shape model
Classification code:461.2  Biological Materials and Tissue Engineering - 723.5  Computer Applications - 746  Imaging Techniques
DOI:10.1016/j.neucom.2014.07.044

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 223>

Accession number:20150500479083
Title:Learning multiple linear mappings for efficient single image super-resolution
Authors:Zhang, Kaibing (1, 2); Tao, Dacheng (3); Gao, Xinbo (1); Li, Xuelong (4); Xiong, Zenggang (2)
Author affiliation:(1) State Key Laboratory of Integrated Services Networks, School of Electronic Engineering, Xidian University, Xi'an, China; (2) School of Computer and Information Science, Hubei Engineering University, Xiaogan, China; (3) Centre for Quantum Computation and Intelligent Systems, Faculty of Engineering and Information Technology, University of Technology, Sydney; NSW, Australia; (4) Center for OPTical IMagery Analysis and Learning (OPTIMAL), State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xi'an, China
Source title:IEEE Transactions on Image Processing
Abbreviated source title:IEEE Trans Image Process
Volume:24
Issue:3
Issue date:March 1, 2015
Publication year:2015
Pages:846-861
Article number:7003985
Language:English
ISSN:10577149
CODEN:IIPRE4
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:Example learning-based superresolution (SR) algorithms show promise for restoring a high-resolution (HR) image from a single low-resolution (LR) input. The most popular approaches, however, are either time-or space-intensive, which limits their practical applications in many resource-limited settings. In this paper, we propose a novel computationally efficient single image SR method that learns multiple linear mappings (MLM) to directly transform LR feature subspaces into HR subspaces. In particular, we first partition the large nonlinear feature space of LR images into a cluster of linear subspaces. Multiple LR subdictionaries are then learned, followed by inferring the corresponding HR subdictionaries based on the assumption that the LR-HR features share the same representation coefficients. We establish MLM from the input LR features to the desired HR outputs in order to achieve fast yet stable SR recovery. Furthermore, in order to suppress displeasing artifacts generated by the MLM-based method, we apply a fast nonlocal means algorithm to construct a simple yet effective similarity-based regularization term for SR enhancement. Experimental results indicate that our approach is both quantitatively and qualitatively superior to other application-oriented SR methods, while maintaining relatively low time and space complexity. &copy; 1992-2012 IEEE.
Number of references:52
Main heading:Mathematical transformations
Controlled terms:Algorithms - Mapping - Optical resolving power
Uncontrolled terms:Application-oriented - Computationally efficient - Feature subspace - High resolution image - Linear mapping - Non local means - Single images - Time and space complexity
Classification code:723  Computer Software, Data Handling and Applications - 741.1  Light/Optics - 902.1  Engineering Graphics - 921  Mathematics - 921.3  Mathematical Transformations
DOI:10.1109/TIP.2015.2389629

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 224>

Accession number:20151100635532
Title:The design of space optical communications terminal with high efficient
Authors:Deng, Xiaoguo (1); Li, Gang (1); Jiang, Bo (1); Yang, Xiaoxu (1); Yan, Peipei (1)
Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics of CAS, Xi'an, China
Corresponding author:Deng, Xiaoguo
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9449
Volume title:International Conference on Photonics and Optical Engineering, icPOE 2014
Part number:1 of 1
Issue date:2015
Publication year:2015
Article number:94490J
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628415650
Document type:Conference article (CA)
Conference name:International Conference on Photonics and Optical Engineering, icPOE 2014
Conference date:October 13, 2014  -  October 15, 2014
Conference location:Xi'an, China
Conference code:111356
Sponsor:Optics and Photonics Society of Singapore; Shaanxi Optical Society; Shaanxi Provincial Physical Society
Publisher:SPIE
Abstract:In order to improve high-speed laser space optical communications terminal receive energy and emission energy, meet the demand of mini-type and light-type for space-based bear platform, based on multiple-reflect coaxial optical receiving antenna structure, while considering the installation difficulty, a high-efficient optical system had been designed, which aperture is off-axial, both signal-receiving sub-optical system and emission sub-optical system share a same primary optical path. By the separating light lens behind the primary optical path, the received light with little energy will be filtered and shaped and then transmitted to each detector, at the same time, by the coupling element, the high-power laser will be coupling into optical antenna, and then emitted to outside. Applied the power-detected optical system evaluate principle, the optimized off-axial optical system's efficiency had been compared with the coaxial optical system. While, analyzed the Gauss beam energy distribution by numerical theory, discussed that whether off-axis optical system can be an emission terminal, verify the feasibility of the theory of the design of the system. &copy; 2015 SPIE.
Number of references:10
Main heading:Optical systems
Controlled terms:Antennas - Design - High power lasers - Lens antennas - Lenses - Optical communication - Optical design - Photonics - Receiving antennas
Uncontrolled terms:Coaxial optical systems - Coupling element - Energy and emissions - Energy detection - High speed laser - Optical antennae - Ritchey-Chretien system - Space optical communication
Classification code:408  Structural Design - 716  Telecommunication; Radar, Radio and Television - 717.1  Optical Communication Systems - 741.1  Light/Optics - 741.3  Optical Devices and Systems - 744.1  Lasers, General
DOI:10.1117/12.2083003

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 225>

Accession number:20154301447879
Title:Optical properties of a binuclear neodymium complex in phosphorus oxychloride for liquid laser
Authors:Zhang, Guofang (1); She, Jiangbo (2); Han, Kai (1); Nie, Rongzhi (2); Li, Dongdong (3); Peng, Bo (2)
Author affiliation:(1) Key Laboratory of Applied Surface and Colloid Chemistry, MOE, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Science (CAS), Xi'an, Shaanxi, China; (3) School of Electronic Engineering, Xi'An University of Post and Telecommunications, Xi'an, Shaanxi, China
Corresponding author:She, Jiangbo
Source title:Optical Materials
Abbreviated source title:Opt Mater
Volume:49
Issue date:November 2015
Publication year:2015
Pages:343-347
Language:English
ISSN:09253467
CODEN:OMATET
Document type:Journal article (JA)
Publisher:Elsevier
Abstract:A novel binuclear neodymium complex Nd(CF<inf>3</inf>COO)<inf>3</inf>&middot;(Ph<inf>3</inf>PO)<inf>2</inf>(Ph<inf>3</inf>PO: triphenylphosphine oxide) with high stimulated emission cross-section was presented. The molecular structure of the complex was characterized by single-crystal X-ray diffraction. The optical properties of the complex in liquid medium were studied. From the absorption and luminescence spectra, the Judd-Ofelt parameters of Nd(CF<inf>3</inf>COO)<inf>3</inf>&middot;(Ph<inf>3</inf>PO)<inf>2</inf>in phosphorus oxychloride were obtained. Based on the crystal structure, the effects of crystal field and bonding valence properties on three intensity parameters &Omega;<inf>t</inf>(t = 2, 4, 6) and emission cross-section were analyzed in detail. The emission cross-section of<sup>4</sup>F<inf>3/2</inf>&rarr;<sup>4</sup>I<inf>11/2</inf>fluorescence transition (2.78 &times; 10<sup>-20</sup>cm<sup>2</sup>) of the new neodymium compound was higher than those of other Nd(III) complexes and even comparable with some laser glasses. &copy; 2015 Elsevier B.V. All rights reserved.
Number of references:28
Main heading:Optical properties
Controlled terms:Bins - Crystal structure - Judd-Ofelt theory - Laser theory - Liquid lasers - Liquids - Luminescence - Neodymium - Phosphorus - Single crystals  - X ray diffraction
Uncontrolled terms:Emission cross section - Fluorescence transitions - Intensity parameters - Judd-Ofelt parameters - Luminescence spectrum - Single crystal x-ray diffraction - Stimulated emission cross section - Triphenylphosphine oxide
Classification code:547.2  Rare Earth Metals - 694.4  Storage - 741.1  Light/Optics - 744.1  Lasers, General - 744.3  Liquid Lasers - 804  Chemical Products Generally - 931.3  Atomic and Molecular Physics - 933.1  Crystalline Solids - 933.1.1  Crystal Lattice
DOI:10.1016/j.optmat.2015.10.002

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 226>

Accession number:20153101100718
Title:High-speed quantum-random number generation by continuous measurement of arrival time of photons
Authors:Yan, Qiurong (1, 2); Zhao, Baosheng (2); Hua, Zhang (1); Liao, Qinghong (1); Yang, Hao (3)
Author affiliation:(1) Department of Electronic Information Engineering, Nanchang University, Nanchang, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (3) Shannxi Key Laboratory of Optical Information Technology, School of Science, Northwestern Polytechnical University, Xi'an, China
Corresponding author:Yan, Qiurong
Source title:Review of Scientific Instruments
Abbreviated source title:Rev. Sci. Instrum.
Volume:86
Issue:7
Issue date:July 1, 2015
Publication year:2015
Article number:073113
Language:English
ISSN:00346748
E-ISSN:10897623
CODEN:RSINAK
Document type:Journal article (JA)
Publisher:American Institute of Physics Inc.
Abstract:We demonstrate a novel high speed and multi-bit optical quantum random number generator by continuously measuring arrival time of photons with a common starting point. To obtain the unbiased and post-processing free random bits, the measured photon arrival time is converted into the sum of integral multiple of a fixed period and a phase time. Theoretical and experimental results show that the phase time is an independent and uniform random variable. A random bit extraction method by encoding the phase time is proposed. An experimental setup has been built and the unbiased random bit generation rate could reach 128 Mb/s, with random bit generation efficiency of 8 bits per detected photon. The random numbers passed all tests in the statistical test suite. &copy; 2015 AIP Publishing LLC.
Number of references:20
Main heading:Random number generation
Controlled terms:Number theory - Photons
Uncontrolled terms:Bit extraction - Continuous measurements - Detected photons - Integral multiples - Post processing - Quantum random number generators - Random bit generations - Uniform random variables
Classification code:741.1  Light/Optics - 921  Mathematics - 922.2  Mathematical Statistics
DOI:10.1063/1.4927320

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 227>

Accession number:20160401852778
Title:Design and implementation of CCD exposure time control based on driver timing
Authors:Liu, Hui (1, 2); Liu, Xuebin (1); Chen, Xiaolai (1); Kong, Liang (1); Liu, Yongzheng (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China
Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering
Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.
Volume:44
Issue date:December 25, 2015
Publication year:2015
Pages:199-204
Language:Chinese
ISSN:10072276
Document type:Journal article (JA)
Publisher:Chinese Society of Astronautics
Abstract:A new method for exposure time control by driver timing was proposed for non-electronic shutter frame transfer area CCD imaging detector. Based on the Sarnoff's back illuminated frame transfer array CCD sensor, the charge will be drained quickly in the excess period, with the driver timing controlled by the software. Selecting exposure time as 2 ms, 4 ms, 6 ms and 9.96 ms, the CCD output signal amplitude was measured under system frame frequency of 100 fps. The gray value of continuous 100 frame image calculated by the Matlab. Results show that the method can control the CCD exposure time effectively, and can be implemented by software. It can be widely used in the frame transfer area CCD imaging device without electronic shutter. &copy; 2015, Editorial Board of Journal of Infrared and Laser Engineering. All right reserved.
Number of references:9
Main heading:MATLAB
Controlled terms:Charge coupled devices - Control
Uncontrolled terms:Back-illuminated - Ccd imaging devices - Design and implementations - Driver timing - Electronic shutters - Exposure-time - Frame-transfer - Output signal amplitudes
Classification code:714.2  Semiconductor Devices and Integrated Circuits - 921  Mathematics

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 228>

Accession number:20151000618620
Title:Observation of dual-wavelength solitons and bound states in a nanotube/microfiber mode-locking fiber laser
Authors:Zeng, C. (1); Cui, Y.D. (1); Guo, J. (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
Corresponding author:Cui, Y.D.
Source title:Optics Communications
Abbreviated source title:Opt Commun
Volume:347
Issue date:July 2015
Publication year:2015
Pages:44-49
Article number:19969
Language:English
ISSN:00304018
CODEN:OPCOB8
Document type:Journal article (JA)
Publisher:Elsevier
Abstract:We report on the experimental observation of dual-wavelength soliton and the phase-locked bound state in an all-fiber laser mode-locked by a carbon nanotubes/microfiber saturable absorber. The operation wavelengths are strongly dependent on the intracavity loss. By adjusting an attenuator to increase the intracavity loss, mode-locking wavelength shifts from 1557 to 1531 nm. With the appropriate pump power and intracavity loss, dual-wavelength solitons are achieved simultaneously. In addition, the phase-locked bound-state solitons are also observed at the two wavelengths. The pulse separation and phase difference are related to the first-order Kelly sidebands. &copy; 2015 Elsevier B.V. All rights reserved.
Number of references:78
Main heading:Mode-locked fiber lasers
Controlled terms:Carbon - Carbon nanotubes - Fiber lasers - Laser mode locking - Locks (fasteners) - Saturable absorbers - Solitons - Yarn
Uncontrolled terms:Bound state - Intracavity loss - Micro-fiber - Mode-locking fiber laser - Operation wavelength - Phase difference - Pulse separations - Wavelength shift
Classification code:601.3  Mechanisms - 744.1  Lasers, General - 744.4  Solid State Lasers - 761  Nanotechnology - 804  Chemical Products Generally - 819.4  Fiber Products - 931.3  Atomic and Molecular Physics
DOI:10.1016/j.optcom.2015.02.054

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 229>

Accession number:20151600765013
Title:Super resolution optic three-dimensional imaging based on compressed sensing
Authors:Wang, Feng (1, 2); Luo, Jian-Jun (1); Tang, Xing-Jia (3); Li, Li-Bo (3); Hu, Bin-Liang (3)
Author affiliation:(1) School of Astronautics, Northwestern Polytechnical University, Xi'an, China; (2) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an, China; (3) Key Laboratory of Spectral Imaging Technology CAS, Xi'an, China
Corresponding author:Tang, Xing-Jia
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:44
Issue:3
Issue date:March 1, 2015
Publication year:2015
Article number:0328001
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:A super resolution optic three-dimensional imaging based on compressed sensing was proposed for better optic imaging, in which imaging system was consisted of object glass, coding template, dispersion element, collimating lens, focus lens, detector in the front, hyperspectral data was reconstructed in the end by sparse reconstruction algorithm, so the most of data processing was transformed to the back-end from the imaging system. Meanwhile, Piece reconstruction, dislocation pretreatment and multi-frame reconstruction were used for improving accuracy of reconstruction, reducing memory of the back-processing, lowing computation complexity. By comparing the spectral curve, signal noise ratio, spectral error of the original and the reconstructed data cube, and doing classification and identification analysis, it was gained that the proposed compressed sensing could realize super resolution optic three-dimensional imaging, which have better property in imaging and data application, it can be used in big breath, high resolution, low power consumption and moving-target imaging observation. &copy;, 2015, Chinese Optical Society. All right reserved.
Number of references:18
Page count:7
Main heading:Image processing
Controlled terms:Compressed sensing - Data handling - Image reconstruction - Image resolution - Imaging systems - Optical resolving power - Signal reconstruction - Spectroscopy - Target tracking
Uncontrolled terms:Classification and identifications - Computation complexity - Hyper-spectral images - Low-power consumption - Reconstruction algorithms - Sparse representation - Spectral imaging - Three dimensional imaging
Classification code:716.1  Information Theory and Signal Processing - 716.2  Radar Systems and Equipment - 723.2  Data Processing and Image Processing - 741.1  Light/Optics - 801  Chemistry
DOI:10.3788/gzxb20154403.0328001

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 230>

Accession number:20154501520710
Title:Rapid modeling method of LED free-form surface lens based on Scheme language
Authors:Dai, Yidan (1, 2); Qu, Enshi (1); Ren, Liyong (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China
Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering
Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.
Volume:44
Issue:9
Issue date:September 25, 2015
Publication year:2015
Pages:2690-2695
Language:English
ISSN:10072276
Document type:Journal article (JA)
Publisher:Chinese Society of Astronautics
Abstract:Multiple softwares were required in the traditional design process of LED free-form surface lens. It is obvious that this process is complicated and inefficient. Moreover, when the model was transferred from 3D modeling software to optical simulation software, the file format had to be changed to solve the problem of the software compatibility. Note that some subtle changes were inevitably introduced to the model by such an operation, such as the generation of cracks or tiny deformation which would seriously affect the light efficiency and the degree of illumination uniformity. A new design method was presented in this paper which was used to directly generate model in the optical simulation software by using Scheme language. In this paper, the method of mesh division was applied to design the LED free-form surface lens with rectangular lighting. After the corresponding surface configuration was obtained, 3D modeling software and the Scheme language programming were used to generate lens model respectively. With the help of optical simulation software, a light source with the size of 1 mm in diameter was used in experiment, in which total one million rays were computed. The simulated results could be acquired by both models. It can be seen that the model deformation problems caused by the process of the model transfer could be prevented by using Scheme language, and the degree of illumination uniformity was also increased from 67% to 93.5%. Meanwhile, only 5 seconds were needed in modeling process by Scheme language which was more efficient than 3D modeling software. &copy;, 2015, Editorial Board of Journal of Infrared and Laser Engineering. All right reserved.
Number of references:15
Main heading:Modeling languages
Controlled terms:Computational linguistics - Computer simulation languages - Computer software - Deformation - Light - Light emitting diodes - Light sources - Lighting - Surface measurement
Uncontrolled terms:Free-form surface - Illumination uniformity - Model deformations - Road lighting - Scheme languages - Secondary optics - Software compatibility - Surface configuration
Classification code:714.2  Semiconductor Devices and Integrated Circuits - 721.1  Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory - 723  Computer Software, Data Handling and Applications - 723.1.1  Computer Programming Languages - 741.1  Light/Optics - 943.2  Mechanical Variables Measurements

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 231>

Accession number:20150700517042
Title:Facile synthesis of 3D reduced graphene oxide and its polyaniline composite for super capacitor application
Authors:Tang, Wei (1); Peng, Li (2); Yuan, Chunqiu (1); Wang, Jian (1); Mo, Shenbin (1); Zhao, Chunyan (1); Yu, Youhai (3); Min, Yonggang (1); Epstein, Arthur J. (4)
Author affiliation:(1) Key Laboratory for Organic Electronics and Information Displays, Institute of Advanced Materials(IAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing, China; (2) Yancheng Additive Manufacturing Technology Co., Ltd, China; (3) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an, China; (4) OSU Institute for Magnetic and Electronic Polymers, United States
Corresponding author:Yu, Youhai
Source title:Synthetic Metals
Abbreviated source title:Synth Met
Volume:202
Issue date:April 2015
Publication year:2015
Pages:140-146
Language:English
ISSN:03796779
CODEN:SYMEDZ
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:We propose a facile and environmentally-friendly strategy for fabricating three-dimensional (3D) reduced graphene oxide (3D-rGO) porous structure with one step hydrothermal method using glucose as the reducing agent and CaCO<inf>3</inf> as the template. The reducing process was accompanied by the self-assembly of two-dimensional graphene sheets into a 3D hydrogel which entrapped CaCO<inf>3</inf> particle into the graphene network. After the removal of CaCO<inf>3</inf> particle, 3D-rGO with interconnected porous structure was obtained. The 3D-rGO was further composted with PANI nanowire. The structure and the property of 3D-rGO and 3D-rGO/PANI composite have been characterized by X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, transmission electron microscopy, cyclic voltammetry, galvanostatic charge-discharge test and electrochemical impedance spectroscopy. Electrochemical test reveals that the 3D-rGO/PANI has high capacitance performance of 243 F g<sup>-1</sup> at current charge-discharge current density of 1 A g<sup>-1</sup> and an excellent capacity retention rate of 86% after 1000 cycles. &copy; 2015 Elsevier B.V. All rights reserved.
Number of references:30
Main heading:X ray photoelectron spectroscopy
Controlled terms:Calcium carbonate - Capacitors - Composite materials - Cyclic voltammetry - Electric discharges - Electrochemical impedance spectroscopy - Electron microscopy - Fourier transform infrared spectroscopy - Graphene - Lithium compounds  - Nanowires - Polyacrylonitriles - Polyaniline - Porosity - Scanning electron microscopy - Self assembly - Transmission electron microscopy - X ray diffraction
Uncontrolled terms:Capacitance performance - Galvanostatic charge discharges - Interconnected porous structure - Polyaniline composites - Reduced graphene oxides - Super capacitor - Three-dimensional graphene - Threedimensional (3-d)
Classification code:415  Metals, Plastics, Wood and Other Structural Materials - 701.1  Electricity: Basic Concepts and Phenomena - 704.1  Electric Components - 741.3  Optical Devices and Systems - 761  Nanotechnology - 801  Chemistry - 801.4.1  Electrochemistry - 804  Chemical Products Generally - 811  Cellulose, Paper and Wood Products - 815.1.1  Organic Polymers - 931.2  Physical Properties of Gases, Liquids and Solids - 931.3  Atomic and Molecular Physics - 933  Solid State Physics - 933.1.1  Crystal Lattice - 951  Materials Science
DOI:10.1016/j.synthmet.2015.01.031

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 232>

Accession number:20161702279146
Title:Design and research of spectropolarimetric system based on Sagnac interferometer
Authors:Yu, Tao (1, 2); Hu, Bingliang (1); Zhang, Zhoufeng (1, 2); Gao, Xiaohui (1); Wei, Ruyi (1); Wu, Qijing (1)
Author affiliation:(1) Xi'an Institute of Optics, Precision Mechanics of Chinese Academy of Sciences, Key Laboratory of Spectral Imaging Technology of Chinese Academy of Sciences, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9795
Monograph title:Selected Papers of the Photoelectronic Technology Committee Conferences held June-July 2015
Issue date:2015
Publication year:2015
Article number:97951R
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628418804
Document type:Conference article (CA)
Conference name:International Conference on Frontiers in International Conference on Frontiers in Terahertz Technology and Applications, and the International Symposium on Surface Topography and Optical Microscopy
Conference date:July 23, 2015  -  July 25, 2015
Conference location:Harbin, China
Conference code:117486
Sponsor:Chinese Academy of Engineering; Chinese Society for Optical Engineering; Harbin Institute of Technology; National Natural Science Foundation of China
Publisher:SPIE
Abstract:Spectral imaging technology has made great achievements in applications of earth observation and space target detection, with the further development of research, the requirement that People tend to get more material properties about target is also improving rapidly, so getting more characters of the target is continuous pursuit goal for the instruments of optical remote sensing. Polarization is one of the four main physical properties of light including intensity, frequency and phase . It has very important significance for remote sensing observations such as improving the accuracy of target recognition. This paper proposes on a spectropolarimeter system based on Sagnac interferometer, and introduces the main aspects related to System components, working principle, optical design, adaptive spectrum extraction algorithm, state of polarization extraction methods. Also get the data of polarization spectral imaging by using the instruments designed by the principle .By processing these data I have got the combined polarization image and target spectral curves, achieved a good result. It is a new attempt to obtain polarization spectral image by integrated measuring system. Then thoroughly solve the traditional shortcoming of spectropolarimeter, such as asynchronous detecting, poor stability and vibration, poor energy efficiency. It can be applied to many kinds of fields. Simultaneously the paper puts forward some relevant new points in the future research for this kind of principle. &copy; 2015 SPIE.
Number of references:10
Main heading:Remote sensing
Controlled terms:Adaptive optics - Data handling - Earth (planet) - Energy efficiency - Extraction - Fiber optic sensors - Imaging techniques - Interferometers - Optical design - Polarization  - Space optics - Spectroscopy - Surface topography
Uncontrolled terms:Extraction algorithms - Image combination - Image enhancing - Optical remote sensing - Sagnac interferometer - Spectral imaging technology - Spectropolarimeters - State of polarization
Classification code:525.2  Energy Conservation - 723.2  Data Processing and Image Processing - 741.1  Light/Optics - 741.1.2  Fiber Optics - 746  Imaging Techniques - 802.3  Chemical Operations - 931.2  Physical Properties of Gases, Liquids and Solids - 941.3  Optical Instruments
DOI:10.1117/12.2216127

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 233>

Accession number:20153001051144
Title:All-phase target reconstruction method for coherent field imaging
Authors:Cao, Bei (1); Luo, Xiu-Juan (1); Chen, Ming-Lai (1); Zhang, Yu (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
Corresponding author:Cao, Bei
Source title:Wuli Xuebao/Acta Physica Sinica
Abbreviated source title:Wuli Xuebao
Volume:64
Issue:12
Issue date:June 20, 2015
Publication year:2015
Article number:124205
Language:Chinese
ISSN:10003290
CODEN:WLHPAR
Document type:Journal article (JA)
Publisher:Institute of Physics, Chinese Academy of Sciences
Abstract:Received signal processing and target reconstruction technique plays a key role in coherent field imaging, and directly influences the quality of the reconstructed image of a target. Based on all-phase fast Fourier transformation (FFT) spectrum analysis theory, a new processing and reconstruction method is proposed. By directly extracting the phase and amplitude information from all-phase FFT spectrum of the return signal, the proposed all-phase target reconstruction method is capable of inhibiting the frequency error caused by many factors, thus reconstructing the target image more precisely. The validity of the proposed method is proved by a coherent field imaging system in outdoor environments, and it has a better reconstruction performance than a traditional method. The resolution of the reconstructed target is close to a theoretical diffraction limit. &copy;, 2015, Chinese Physical Society. All right reserved.
Number of references:11
Page count:9
Main heading:Image processing
Controlled terms:Diffraction - Fast Fourier transforms - Image reconstruction - Signal processing - Spectrum analysis
Uncontrolled terms:All phase - Amplitude information - Coherent fields - Fast fourier transformation (FFT) - Frequency correction - Outdoor environment - Reconstruction method - Reconstruction techniques
Classification code:716.1  Information Theory and Signal Processing - 741  Light, Optics and Optical Devices - 741.1  Light/Optics - 921  Mathematics - 921.3  Mathematical Transformations - 941  Acoustical and Optical Measuring Instruments - 942  Electric and Electronic Measuring Instruments - 943  Mechanical and Miscellaneous Measuring Instruments - 944  Moisture, Pressure and Temperature, and Radiation Measuring Instruments
DOI:10.7498/aps.64.124205

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 234>

Accession number:20153801292592
Title:Metamaterial terahertz switch based on split-ring resonator embedded with photoconductive silicon
Authors:Liu, Xinwang (1); Liu, Hongjun (1); Sun, Qibing (1); Huang, Nan (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an, China
Corresponding author:Liu, Hongjun
Volume:54
Issue:12
Issue date:April 20, 2015
Publication year:2015
Pages:3478-3483
Language:English
ISSN:1559128X
E-ISSN:21553165
CODEN:APOPAI
Document type:Journal article (JA)
Publisher:OSA - The Optical Society
Abstract:In this paper, a metamaterial terahertz (THz) switch based on a split-ring resonator embedded with photoconductive silicon is presented and numerically investigated. Simulation results show that the switch works at two different resonant modes with different pump light powers and that the response time of the switch is less than 1 ps. By defining the switching window as the frequency range where the transmission magnitude of the ON state is one order of magnitude higher than the OFF state, a switching window ranging from 1.26 to 1.49 THz is obtained. The large modulation depth of the switch is due to the large separations of the maximum and minimum transmissions, which are 0.89 and 0.01, respectively. Particularly, the switch is frequency tunable by changing the thickness and permittivity of the dielectric layer. &copy; 2015 Optical Society of America.
Number of references:27
Main heading:Photoconductive switches
Controlled terms:Metamaterials - Optical resonators - Photoconductivity - Resonators - Ring gages
Uncontrolled terms:Dielectric layer - Frequency ranges - Large modulation depth - Pump light - Resonant mode - Split ring resonator - Switching window - Terahertz switches
Classification code:714.2  Semiconductor Devices and Integrated Circuits - 741.1  Light/Optics - 741.3  Optical Devices and Systems - 943.3  Special Purpose Instruments - 951  Materials Science
DOI:10.1364/AO.54.003478

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 235>

Accession number:20161702279054
Title:Research on the detection capability of space camera
Authors:Yao, Dalei (1, 2); Xue, Jianru (1); Chen, Zhi (2); Wen, Yan (2); Jiang, Baotan (2)
Author affiliation:(1) Xi'an Jiaotong University, Xi'an, China; (2) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9795
Monograph title:Selected Papers of the Photoelectronic Technology Committee Conferences held June-July 2015
Issue date:2015
Publication year:2015
Article number:97952E
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628418804
Document type:Conference article (CA)
Conference name:International Conference on Frontiers in International Conference on Frontiers in Terahertz Technology and Applications, and the International Symposium on Surface Topography and Optical Microscopy
Conference date:July 23, 2015  -  July 25, 2015
Conference location:Harbin, China
Conference code:117486
Sponsor:Chinese Academy of Engineering; Chinese Society for Optical Engineering; Harbin Institute of Technology; National Natural Science Foundation of China
Publisher:SPIE
Abstract:Detection capability of space camera is regarded as the principal parameter in the design of space camera. On the basis of the concept of signal-to-noise ratio (SNR) and through the research of principles and derivation of theories, detection capabilities under static condition and the condition of relative motion were analyzed and compared. With a set of typical parameters given, the change of detectable magnitude with the changes of parameters was investigated. Considering the real operating environment of space camera, the necessity of temperature control in the design of space camera was discussed. The theoretical analysis provides a reference for the design of space camera. &copy; 2015 SPIE.
Number of references:5
Main heading:Signal to noise ratio
Controlled terms:Cameras - Signal detection - Surface topography - Temperature control
Uncontrolled terms:Detection capability - Magnitude - Operating environment - Relative motion - Space cameras - Static conditions
Classification code:716.1  Information Theory and Signal Processing - 731.3  Specific Variables Control - 742.2  Photographic Equipment - 931.2  Physical Properties of Gases, Liquids and Solids
DOI:10.1117/12.2217517

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 236>

Accession number:20150900578558
Title:Texture classification and retrieval using shearlets and linear regression
Authors:Dong, Yongsheng (1, 2); Tao, Dacheng (2); Li, Xuelong (2); Ma, Jinwen (3); Pu, Jiexin (1)
Author affiliation:(1) Information Engineering College, Henan University of Science and Technology, Luoyang, China; (2) Center for OPTical IMagery Analysis and Learning, State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xian, China; (3) Department of Information Science, School of Mathematical Sciences and LMAM, Peking University, Beijing, China
Source title:IEEE Transactions on Cybernetics
Abbreviated source title:IEEE Trans. Cybern.
Volume:45
Issue:3
Issue date:March 1, 2015
Publication year:2015
Pages:358-369
Article number:6853375
Language:English
ISSN:21682267
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:Statistical modeling of wavelet subbands has frequently been used for image recognition and retrieval. However, traditional wavelets are unsuitable for use with images containing distributed discontinuities, such as edges. Shearlets are a newly developed extension of wavelets that are better suited to image characterization. Here, we propose novel texture classification and retrieval methods that model adjacent shearlet subband dependences using linear regression. For texture classification, we use two energy features to represent each shearlet subband in order to overcome the limitation that subband coefficients are complex numbers. Linear regression is used to model the features of adjacent subbands; the regression residuals are then used to define the distance from a test texture to a texture class. Texture retrieval consists of two processes: the first is based on statistics in contourlet domains, while the second is performed using a pseudo-feedback mechanism based on linear regression modeling of shearlet subband dependences. Comprehensive validation experiments performed on five large texture datasets reveal that the proposed classification and retrieval methods outperform the current state-of-the-art. &copy; 2013 IEEE.
Number of references:51
Main heading:Textures
Controlled terms:Classification (of information) - Image recognition - Information retrieval - Linear regression - Regression analysis
Uncontrolled terms:Contourlets - Shearlets - Subbands - Texture classification - Texture retrieval
Classification code:716  Telecommunication; Radar, Radio and Television - 716.1  Information Theory and Signal Processing - 723.5  Computer Applications - 922.2  Mathematical Statistics - 933  Solid State Physics
DOI:10.1109/TCYB.2014.2326059

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 237>

Accession number:20145100338437
Title:An efficient MRF embedded level set method for image segmentation
Authors:Yang, Xi (1); Gao, Xinbo (1); Tao, Dacheng (2); Li, Xuelong (3); Li, Jie (4)
Author affiliation:(1) State Key Laboratory of Integrated Services Networks, School of Electronic Engineering, Xidian University, Xi'an, China; (2) Centre for Quantum Computation and Intelligent Systems, Faculty of Engineering and Information Technology, University of Technology, Sydney, 235 Jones Street, Ultimo; NSW, Australia; (3) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (4) Video and Image Processing System Laboratory, School of Electronic Engineering, Xidian University, Xi'an, China
Corresponding author:Yang, Xi
Source title:IEEE Transactions on Image Processing
Abbreviated source title:IEEE Trans Image Process
Volume:24
Issue:1
Issue date:January 1, 2015
Publication year:2015
Pages:9-21
Article number:6960855
Language:English
ISSN:10577149
CODEN:IIPRE4
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:This paper presents a fast and robust level set method for image segmentation. To enhance the robustness against noise, we embed a Markov random field (MRF) energy function to the conventional level set energy function. This MRF energy function builds the correlation of a pixel with its neighbors and encourages them to fall into the same region. To obtain a fast implementation of the MRF embedded level set model, we explore algebraic multigrid (AMG) and sparse field method (SFM) to increase the time step and decrease the computation domain, respectively. Both AMG and SFM can be conducted in a parallel fashion, which facilitates the processing of our method for big image databases. By comparing the proposed fast and robust level set method with the standard level set method and its popular variants on noisy synthetic images, synthetic aperture radar (SAR) images, medical images, and natural images, we comprehensively demonstrate the new method is robust against various kinds of noises. In particular, the new level set method can segment an image of size 500 x 500 within 3 s on MATLAB R2010b installed in a computer with 3.30-GHz CPU and 4-GB memory.
Number of references:52
Main heading:Numerical methods
Controlled terms:Algebra - Drop breakup - Image segmentation - Level measurement - Markov processes - Medical imaging - Synthetic aperture radar
Uncontrolled terms:Algebraic multigrids - Computation domains - Fast implementation - Level Set - Markov Random Fields - Robustness against noise - Sparse field method - Synthetic aperture radar (SAR) images
Classification code:716.2  Radar Systems and Equipment - 741  Light, Optics and Optical Devices - 741.1  Light/Optics - 746  Imaging Techniques - 921.1  Algebra - 921.6  Numerical Methods - 922.1  Probability Theory - 931.2  Physical Properties of Gases, Liquids and Solids - 943.2  Mechanical Variables Measurements
DOI:10.1109/TIP.2014.2372615

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 238>

Accession number:20161602266821
Title:Restoration of motion blurred image with Lucy-Richardson algorithm
Authors:Li, Jing (1); Liu, Zhao Hui (1); Zhou, Liang (1)
Author affiliation:(1) Dept. of Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'An, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9675
Monograph title:AOPC 2015: Image Processing and Analysis
Issue date:2015
Publication year:2015
Article number:967519
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628419009
Document type:Conference article (CA)
Conference name:Applied Optics and Photonics, China: Image Processing and Analysis, AOPC 2015
Conference date:May 5, 2015  -  May 7, 2015
Conference location:Beijing, China
Conference code:117481
Sponsor:Chinese Society for Optical Engineering
Publisher:SPIE
Abstract:Images will be blurred by relative motion between the camera and the object of interest. In this paper, we analyzed the process of motion-blurred image, and demonstrated a restoration method based on Lucy-Richardson algorithm. The blur extent and angle can be estimated by Radon transform algorithm and auto-correlation function, respectively, and then the point spread function (PSF) of the motion-blurred image can be obtained. Thus with the help of the obtained PSF, the Lucy-Richardson restoration algorithm is used for experimental analysis on the motion-blurred images that have different blur extents, spatial resolutions and signal-to-noise ratios (SNR's). Further, its effectiveness is also evaluated by structural similarity (SSIM). Further studies show that, at first, for the image with a spatial frequency of 0.2 per pixel, the modulation transfer function (MTF) of the restored images can maintains above 0.7 when the blur extent is no bigger than 13 pixels. That means the method compensates low frequency information of the image, while attenuates high frequency information. At second, we fund that the method is more effective on condition that the product of the blur extent and spatial frequency is smaller than 3.75. Finally, the Lucy-Richardson algorithm is found insensitive to the Gaussian noise (of which the variance is not bigger than 0.1) by calculating the MTF of the restored image. &copy; Copyright 2015 SPIE.
Number of references:11
Main heading:Image processing
Controlled terms:Algorithms - Gaussian noise (electronic) - Image analysis - Image reconstruction - Motion analysis - Optical data processing - Optical design - Optical transfer function - Pixels - Restoration  - Signal to noise ratio
Uncontrolled terms:Autocorrelation functions - Experimental analysis - High-frequency informations - Lucy-Richardson - Motion blur - Motion blurred image - Restoration algorithm - Structural similarity
Classification code:716.1  Information Theory and Signal Processing - 723.2  Data Processing and Image Processing - 741.1  Light/Optics
DOI:10.1117/12.2199337

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 239>

Accession number:20152300916646
Title:Research on optical scattering characteristics of high altitude balloon in near space
Authors:Jing, Nan (1, 2); Li, Chuang (1); Zhou, Nan (1, 2)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; Shaanxi, China; (2) University of Chinese Academy of Sciences, Beijing, China
Corresponding author:Jing, Nan
Source title:Guangxue Xuebao/Acta Optica Sinica
Abbreviated source title:Guangxue Xuebao
Volume:35
Issue:4
Issue date:April 10, 2015
Publication year:2015
Article number:0429001
Language:Chinese
ISSN:02532239
CODEN:GUXUDC
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:Optical scattering characteristics of high altitude balloon in near space are researched based on the fundamental radiation theory in applied optics. Facet of balloon in near space is created according to the general idea of coordination transformation and surface mesh-creation. A bidirectional scattering distribution function (BSDF) model is deduced by summing transparent object all scattering components, including specular reflective, near-specular reflective, diffuse reflective and random diffuse reflective components. A mathematical model of scattering characteristics of balloon in near space is built. An atmospheric modeling tool, MODTRAN, is used to model background radiance in the range of 3~5 &mu;m and 8~14 &mu;m and radiance of balloon in the range of 0.24~2.4 &mu;m. The results show that the high altitude balloon radiance is 2.28 &times; 10&lt;sup&gt;-3&lt;/sup&gt; W/(cm&lt;sup&gt;2&lt;/sup&gt;&mu;m&middot;sr), whose calculation error is 10.6% in use of BSDF model, and relative to bidirectional reflection distribution function (BRDF) model, the accuracy has an improvement of 2%. The modeling method of scattering characteristics of balloon in near space agrees with the modeling results, which proves the correctness of mathematical model. &copy;, 2015, Chinese Optical Society. All right reserved.
Number of references:21
Page count:9
Main heading:Distribution functions
Controlled terms:Atmospheric optics - Light scattering - Models
Uncontrolled terms:Bi-directional scattering distribution functions - Bidirectional reflection distribution function - Coordination transformation - High-altitude balloons - Near space - Optical scattering - Scattering char-acteristics - Transparent objects
Classification code:741.1  Light/Optics - 902.1  Engineering Graphics - 922.1  Probability Theory
DOI:10.3788/AOS201535.0429001

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 240>

Accession number:20153001072170
Title:A Variational Approach to Simultaneous Image Segmentation and Bias Correction
Authors:Zhang, Kaihua (1); Liu, Qingshan (1); Song, Huihui (1); Li, Xuelong (2)
Author affiliation:(1) S-mart Group, Nanjing University of Information Science and Technology, Nanjing, China; (2) Center for OPTical IMagery Analysis and Learning, State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
Source title:IEEE Transactions on Cybernetics
Abbreviated source title:IEEE Trans. Cybern.
Volume:45
Issue:8
Issue date:August 1, 2015
Publication year:2015
Pages:1426-1437
Article number:6932467
Language:English
ISSN:21682267
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:This paper presents a novel variational approach for simultaneous estimation of bias field and segmentation of images with intensity inhomogeneity. We model intensity of inhomogeneous objects to be Gaussian distributed with different means and variances, and then introduce a sliding window to map the original image intensity onto another domain, where the intensity distribution of each object is still Gaussian but can be better separated. The means of the Gaussian distributions in the transformed domain can be adaptively estimated by multiplying the bias field with a piecewise constant signal within the sliding window. A maximum likelihood energy functional is then defined on each local region, which combines the bias field, the membership function of the object region, and the constant approximating the true signal from its corresponding object. The energy functional is then extended to the whole image domain by the Bayesian learning approach. An efficient iterative algorithm is proposed for energy minimization, via which the image segmentation and bias field correction are simultaneously achieved. Furthermore, the smoothness of the obtained optimal bias field is ensured by the normalized convolutions without extra cost. Experiments on real images demonstrated the superiority of the proposed algorithm to other state-of-the-art representative methods. &copy; 2013 IEEE.
Number of references:46
Main heading:Image segmentation
Controlled terms:Algorithms - Computer vision - Gaussian distribution - Iterative methods - Maximum likelihood - Maximum likelihood estimation - Membership functions
Uncontrolled terms:Bias field - Bias field corrections - Energy minimization - Intensity distribution - Intensity inhomogeneity - Normalized convolution - Simultaneous estimation - Variational approaches
Classification code:723.5  Computer Applications - 741.1  Light/Optics - 921  Mathematics - 921.6  Numerical Methods - 922  Statistical Methods - 922.1  Probability Theory
DOI:10.1109/TCYB.2014.2352343

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 241>

Accession number:4788454
Title:In situ optical measurements of Chang'E-3 landing site in Mare Imbrium: 2. Photometric properties of the regolith
Authors:Jin, Weidong (1); Zhang, Hao (1); Yuan, Ye (1); Yang, Yazhou (1); Shkuratov, Yuriy G. (2); Lucey, Paul G. (3); Kaydash, Vadim G. (2); Zhu, Meng-Hua (4); Xue, Bin (5); Di, Kaichang (6); Xu, Bin (6); Wan, Wenhui (6); Xiao, Long (1); Wang, Ziwei (1)
Author affiliation:(1) Planetary Science Institute, School of Earth Sciences, China University of Geosciences, Wuhan, China; (2) Astronomical Institute, Kharkov V.N. Karazin National University, Kharkov, Ukraine; (3) Hawaii Institute of Geophysics and Planetology, University of Hawaii, Honolulu; HI, United States; (4) Space Science Institute, Macau University of Science and Technology, Taipa, China; (5) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (6) State Key Laboratory of Remote Sensing Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing, China
Corresponding author:Zhang, Hao
Source title:Geophysical Research Letters
Abbreviated source title:Geophys. Res. Lett.
Volume:42
Issue:20
Issue date:October 28, 2015
Publication year:2015
Pages:8312-8319
Language:English
ISSN:00948276
E-ISSN:19448007
CODEN:GPRLAJ
Document type:Journal article (JA)
Publisher:Blackwell Publishing Ltd
Abstract:The panorama cameras onboard the Yutu Rover of the Chang'E-3 lunar mission acquired hundreds of high-resolution color images of the lunar surface and captured the first in situ lunar opposition effect (OE) since the Apollo era. We extracted the phase curve and the color ratio in three bands with the phase angle range from 2&deg; to 141&deg;. Photometric inversions using the Hapke model reveal that submicroscopic dusts are present in the landing area and both the coherent backscattering and the shadow hiding are responsible for the strong OE. Compared with spaceborne measurements, the grains in the landing site are brighter, more transparent, and appear to be better crystallized than the average maria basaltic grains. The results show that the phase-reddening effect appears to be present in the in situ phase curves. The current phase curve can be used as the ground-truth validations of any future spaceborne phase curve measurement over the landing site region. Key Points The first in situ lunar phase curve since the Apollo era covers phase angle range of 2-141&deg; Both shadow hiding and coherent backscattering contribute to the opposition surge Single-particle scattering has backward and forward scattering lobes and regolith porosity is obtained &copy; 2015. American Geophysical Union. All Rights Reserved.
Number of references:33
Controlled terms:backscatter - color - dust - in situ measurement - lunar crust - mare basalt - optical method - photometer - porosity - regolith  - satellite - site investigation
Classification code:72.17.1  Moon
DOI:10.1002/2015GL065789

Database:GEOBASE
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 242>

Accession number:20160701912155
Title:How to represent scenes for classification?
Authors:Shi, Jianhua (1, 2); Li, Xuelong (1); Dong, Yongsheng (1)
Author affiliation:(1) Center for OPTical IMagery Analysis and Learning (OPTIMAL), State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Xi'an, Shaanxi, China; (2) University of Chinese Academy of Sciences, 19A Yuquanlu, Beijing, China
Corresponding author:Dong, Yongsheng
Source title:2015 IEEE China Summit and International Conference on Signal and Information Processing, ChinaSIP 2015 - Proceedings
Abbreviated source title:IEEE China Summit Int. Conf. Signal Inf. Process., ChinaSIP - Proc.
Monograph title:2015 IEEE China Summit and International Conference on Signal and Information Processing, ChinaSIP 2015 - Proceedings
Issue date:August 31, 2015
Publication year:2015
Pages:191-195
Article number:7230389
Language:English
ISBN-13:9781479919482
Document type:Conference article (CA)
Conference name:IEEE China Summit and International Conference on Signal and Information Processing, ChinaSIP 2015
Conference date:July 12, 2015  -  July 15, 2015
Conference location:Chengdu, China
Conference code:117267
Sponsor:Institute of Electrical and Electronics Engineers Signal Processing Society (SPS)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:Object-based scene image representations can effectively capture the semantic meanings of a scene. However, they usually neglect a scene's structure information. In this paper, we propose a novel and effective detector-based scene representation method for scene classification. In particular, we extract object features by object detectors. By sensible principal component analysis, we obtain a compact representation vector of objects in a scene image. To capture the scene layout, we then train lots of deformable part models to form a scene response vector. By concatenating these two vectors we use a linear support vector machine for scene classification. When combining with DeCAF [1] in a special way, our method is even more powerful on complex scene categorization. Experimental results on the MIT indoor database show that our approach achieves state-of-The-Art performance on scene classification compared with several popular methods. &copy; 2015 IEEE.
Number of references:23
Main heading:Classification (of information)
Controlled terms:Computer vision - Information science - Object detection - Principal component analysis - Semantics - Vectors
Uncontrolled terms:Compact representation - Deformable part models - Linear Support Vector Machines - Scene classification - Scene structure - Scene understanding - State-of-the-art performance - Structure information
Classification code:716.1  Information Theory and Signal Processing - 723.2  Data Processing and Image Processing - 723.5  Computer Applications - 921.1  Algebra - 922.2  Mathematical Statistics
DOI:10.1109/ChinaSIP.2015.7230389

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 243>

Accession number:20144900287567
Title:Switchable dual-wavelength fiber laser mode-locked by carbon nanotubes
Authors:Chen, G.W. (1); Li, W.L. (1); Yang, H.R. (1); Kong, Y.C. (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
Corresponding author:Chen, G.W.
Source title:Journal of Modern Optics
Abbreviated source title:J. Mod. Opt.
Volume:62
Issue:5
Issue date:March 12, 2015
Publication year:2015
Pages:353-357
Language:English
ISSN:09500340
E-ISSN:13623044
CODEN:JMOPEW
Document type:Journal article (JA)
Publisher:Taylor and Francis Ltd.
Abstract:We have proposed a switchable mode-locked fiber laser by means of carbon nanotube saturable absorber and fiber Bragg gratings (FBGs). The single-wavelength mode-locking operation can be switched between 1549.5 and 1559.5 nm, respectively, which correspond to the central wavelengths of two FBGs. With the appropriate setting of polarization controller, the stable dual-wavelength operation can be achieved due to the high stability of saturable absorber based on carbon nanotubes. Our method provides a simple, stable, low-cost, dual-wavelength ultrafast-pulsed source. &copy; 2014 Taylor & Francis.
Number of references:47
Main heading:Mode-locked fiber lasers
Controlled terms:Carbon - Carbon nanotubes - Fiber Bragg gratings - Fiber lasers - Fibers - Locks (fasteners) - Nanotubes - Saturable absorbers - Yarn
Uncontrolled terms:Central wavelength - Dual wavelength - FBGs - Fiber Bragg gratings (FBGs) - Polarization controllers - Single wavelength - Switchable - Switchable dual wavelengths
DOI:10.1080/09500340.2014.982224

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 244>

Accession number:20153401206302
Title:Large-scale unsupervised hashing with shared structure learning
Authors:Liu, Xianglong (1); Mu, Yadong (2); Zhang, Danchen (1); Lang, Bo (1); Li, Xuelong (3)
Author affiliation:(1) State Key Laboratory of Software Development Environment, Beihang University, Beijing, China; (2) AT and T Laboratories Research, Middletown; NJ, United States; (3) Center for Optical Imagery Analysis and Learning, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
Corresponding author:Liu, Xianglong
Source title:IEEE Transactions on Cybernetics
Abbreviated source title:IEEE Trans. Cybern.
Volume:45
Issue:9
Issue date:September 1, 2015
Publication year:2015
Pages:1811-1822
Article number:6960876
Language:English
ISSN:21682267
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:Hashing methods are effective in generating compact binary signatures for images and videos. This paper addresses an important open issue in the literature, i.e., how to learn compact hash codes by enhancing the complementarity among different hash functions. Most of prior studies solve this problem either by adopting time-consuming sequential learning algorithms or by generating the hash functions which are subject to some deliberately-designed constraints (e.g., enforcing hash functions orthogonal to one another). We analyze the drawbacks of past works and propose a new solution to this problem. Our idea is to decompose the feature space into a subspace shared by all hash functions and its complementary subspace. On one hand, the shared subspace, corresponding to the common structure across different hash functions, conveys most relevant information for the hashing task. Similar to data de-noising, irrelevant information is explicitly suppressed during hash function generation. On the other hand, in case that the complementary subspace also contains useful information for specific hash functions, the final form of our proposed hashing scheme is a compromise between these two kinds of subspaces. To make hash functions not only preserve the local neighborhood structure but also capture the global cluster distribution of the whole data, an objective function incorporating spectral embedding loss, binary quantization loss, and shared subspace contribution is introduced to guide the hash function learning. We propose an efficient alternating optimization method to simultaneously learn both the shared structure and the hash functions. Experimental results on three well-known benchmarks CIFAR-10, NUS-WIDE, and a-TRECVID demonstrate that our approach significantly outperforms state-of-the-art hashing methods. &copy; 2013 IEEE.
Number of references:53
Main heading:Orthogonal functions
Controlled terms:Content based retrieval - Hash functions - Image retrieval - Learning algorithms - Nearest neighbor search
Uncontrolled terms:Alternating optimizations - Cluster distributions - Complementary subspaces - Local neighborhood structures - Locality sensitive hashing - Sequential learning algorithm - Shared structures - unsupervised hashing
Classification code:723  Computer Software, Data Handling and Applications - 741  Light, Optics and Optical Devices - 921  Mathematics
DOI:10.1109/TCYB.2014.2360856

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 245>

Accession number:20151100635567
Title:Design of low-dispersion output coupler for Cr:LiSAF lasers
Authors:Liao, Chunyan (1); Qin, Junjun (2); Zhu, Xiuhong (1)
Author affiliation:(1) Natl. Photoelectric Technol. and Funct. Mat. and Applic. of Sci. and Technol. Intl. Cooperation Base, School of Physics, Northwest University, No. 229, Taibai North Road, Xi'an, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, NO.17, Xinxi Road, Xi'an, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9449
Volume title:International Conference on Photonics and Optical Engineering, icPOE 2014
Part number:1 of 1
Issue date:2015
Publication year:2015
Article number:94491S
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628415650
Document type:Conference article (CA)
Conference name:International Conference on Photonics and Optical Engineering, icPOE 2014
Conference date:October 13, 2014  -  October 15, 2014
Conference location:Xi'an, China
Conference code:111356
Sponsor:Optics and Photonics Society of Singapore; Shaanxi Optical Society; Shaanxi Provincial Physical Society
Publisher:SPIE
Abstract:An designed output coupler used for the dispersion compensation in Cr:LiSAF femtosecond lasers is reported. It is composed of 50 alternating Ta2O5 and SiO2 layers whose thicknesses are obtained by computer optimization to provide low transmittance and as little as possible group delay dispersion. The optimized output coupler has continuous low transmittance of 1% and group delay dispersion of 0 &plusmn;6fs<sup>2</sup> from 750nm to 900nm, which can meet the need of dispersion compensation in Cr:LiSAF lasers. &copy; 2015 SPIE.
Number of references:9
Main heading:Group delay
Controlled terms:Dispersion compensation - Photonics
Uncontrolled terms:Computer optimization - Cr:LiSAF - Cr:LiSAF laser - Group delay dispersion - Low dispersions - Optical thin films - Output couplers
Classification code:703.1  Electric Networks - 712  Electronic and Thermionic Materials - 717  Optical Communication - 741  Light, Optics and Optical Devices - 744  Lasers
DOI:10.1117/12.2083289

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 246>

Accession number:20161602266782
Title:Adaptive detail enhancement for infrared image based on bilateral filter
Authors:Zeng, Qingjie (1); Qin, Hanlin (1); Leng, Hanbing (2); Yan, Xiang (1); Li, Jia (1, 3); Zhou, Huixin (1)
Author affiliation:(1) School of Physics and Optoelectronic Engineering, Xidian University, Xi'an, China; (2) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an, China; (3) Science Institute, Air Force Engineering University, Xi'an, China
Corresponding author:Qin, Hanlin(hlqin@mail.xidian.edu.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9675
Monograph title:AOPC 2015: Image Processing and Analysis
Issue date:2015
Publication year:2015
Article number:96752N
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628419009
Document type:Conference article (CA)
Conference name:Applied Optics and Photonics, China: Image Processing and Analysis, AOPC 2015
Conference date:May 5, 2015  -  May 7, 2015
Conference location:Beijing, China
Conference code:117481
Sponsor:Chinese Society for Optical Engineering
Publisher:SPIE
Abstract:In order to solve the problem that infrared images usually have a poor visual effect with low contrast and weak detail information, an adaptive detail enhancement method for infrared image based on bilateral filter is proposed in this paper. Firstly, adopting the bilateral filter which has a good filtering performance, the original infrared image is effectively derived into the smoothed component and the detail component. Exactly, the detail component is the difference between the original infrared image and the smoothed component. The major merit of using the bilateral filter is that the abundant and subtle detail contents containing a lot of edges and textures of the original infrared image could be obtained via adjusting the parameters flexibly. Further, the detail component plays a key role in obtaining an adaptive detail enhancement weight which is generated by the normalization of the detail component. The weight is in the range [0, 1] and their magnitudes can be regarded as the intensity of the original image details. As a result, this detail enhancement weight is adaptive and effective for the original infrared image. Finally, a kind of linear weighting strategy is utilized to achieve the image sharpness combing the original image and the adaptive weight. The experimental results show that the proposed method outperforms other conventional methods in terms of visual effect and quantitative evaluation, which provides a new approach for infrared image detail enhancement. &copy; 2015 SPIE.
Number of references:10
Main heading:Image processing
Controlled terms:Bandpass filters - Image analysis - Infrared imaging - Optical data processing - Thermography (imaging)
Uncontrolled terms:Adaptive weights - Bilateral filters - Conventional methods - Detail enhancement - Filtering performance - Image details - Quantitative evaluation - Weighting strategies
Classification code:703.2  Electric Filters - 723.2  Data Processing and Image Processing - 742.1  Photography - 746  Imaging Techniques
DOI:10.1117/12.2202764

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 247>

Accession number:20161602271467
Title:Galvanometer control system design of aerial camera motion compensation
Authors:Qiao, Mingrui (1, 2); Cao, Jianzhong (1); Wang, Huawei (1); Guo, Yunzeng (1); Hu, Changchang (1, 2); Tang, Hong (1, 2); Niu, Yuefeng (1, 2)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, Shaanxi Province, China; (2) University of Chinese Academy of Sciences, Beijing, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9678
Monograph title:AOPC 2015: Telescope and Space Optical Instrumentation
Issue date:2015
Publication year:2015
Article number:967804
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628419030
Document type:Conference article (CA)
Conference name:Applied Optics and Photonics, China: Telescope and Space Optical Instrumentation, AOPC 2015
Conference date:May 5, 2015  -  May 7, 2015
Conference location:Beijing, China
Conference code:117482
Sponsor:Chinese Society for Optical Engineering
Publisher:SPIE
Abstract:Aerial cameras exist the image motion on the flight. The image motion has seriously affected the image quality, making the image edge blurred and gray scale loss. According to the actual application situation, when high quality and high precision are required, the image motion compensation (IMC) should be adopted. This paper designs galvanometer control system of IMC. The voice coil motor as the actuator has a simple structure, fast dynamic response and high positioning accuracy. Double-loop feedback is also used. PI arithmetic and Hall sensors are used at the current feedback. Fuzzy-PID arithmetic and optical encoder are used at the speed feedback. Compared to conventional PID control arithmetic, the simulation results show that the control system has fast response and high control accuracy. &copy; 2015 SPIE.
Number of references:11
Main heading:Motion compensation
Controlled terms:Cameras - Control systems - Feedback - Flight control systems - Galvanometers - Hall effect transducers - Motion analysis - Position control - Telescopes - Three term control systems
Uncontrolled terms:Aerial camera - Control arithmetic - Fast dynamic response - Fuzzy-PID - Galvanometer control - Image motion compensation - Positioning accuracy - Voice coil motors
Classification code:723.2  Data Processing and Image Processing - 731.1  Control Systems - 731.3  Specific Variables Control - 742.2  Photographic Equipment - 942.1  Electric and Electronic Instruments
DOI:10.1117/12.2197149

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 248>

Accession number:20161602266797
Title:Camera calibration method of binocular stereo vision based on OpenCV
Authors:Zhong, Wanzhen (1, 2); Dong, Xiaona (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9675
Monograph title:AOPC 2015: Image Processing and Analysis
Issue date:2015
Publication year:2015
Article number:96752C
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628419009
Document type:Conference article (CA)
Conference name:Applied Optics and Photonics, China: Image Processing and Analysis, AOPC 2015
Conference date:May 5, 2015  -  May 7, 2015
Conference location:Beijing, China
Conference code:117481
Sponsor:Chinese Society for Optical Engineering
Publisher:SPIE
Abstract:Camera calibration, an important part of the binocular stereo vision research, is the essential foundation of 3D reconstruction of the spatial object. In this paper, the camera calibration method based on OpenCV (open source computer vision library) is submitted to make the process better as a result of obtaining higher precision and efficiency. First, the camera model in OpenCV and an algorithm of camera calibration are presented, especially considering the influence of camera lens radial distortion and decentering distortion. Then, camera calibration procedure is designed to compute those parameters of camera and calculate calibration errors. High-accurate profile extraction algorithm and a checkboard with 48 corners have also been used in this part. Finally, results of calibration program are presented, demonstrating the high efficiency and accuracy of the proposed approach. The results can reach the requirement of robot binocular stereo vision. &copy; 2015 SPIE.
Number of references:6
Main heading:Stereo image processing
Controlled terms:Bins - Calibration - Cameras - Computer vision - Efficiency - Image analysis - Image processing - Optical data processing - Stereo vision
Uncontrolled terms:Binocular stereo vision - Camera calibration - Checkboard - Computer vision library - Decentering distortion - OpenCV - Radial distortions - Robot binocular stereo visions
Classification code:694.4  Storage - 723.2  Data Processing and Image Processing - 723.5  Computer Applications - 742.2  Photographic Equipment - 913.1  Production Engineering
DOI:10.1117/12.2202186

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 249>

Accession number:20161502216324
Title:Numerical simulation and analysis of wavefront reconstruction iterative method in radial shearing interference
Authors:Wang, Y.F. (1); Da, Z.S. (1)
Author affiliation:(1) Xi&rsquo;an Institute of Optics and Precision Mechanics, Xi&rsquo;an, China
Source title:Mechatronics Engineering and Electrical Engineering - Proceedings of the 2014 International Conference on Mechatronics Engineering and Electrical Engineering, CMEEE  2014
Abbreviated source title:Mechatron. Eng. Electr. Eng. - Proc. Int. Conf. Mechatron. Eng. Electr. Eng. CMEEE
Monograph title:Mechatronics Engineering and Electrical Engineering - Proceedings of the 2014 International Conference on Mechatronics Engineering and Electrical Engineering, CMEEE  2014
Issue date:2015
Publication year:2015
Pages:255-258
Language:English
ISBN-13:9781138027190
Document type:Conference article (CA)
Conference name:International Conference on Mechatronics Engineering and Electrical Engineering, CMEEE  2014
Conference date:October 17, 2014  -  October 19, 2014
Conference location:Sanya, Hainan, China
Conference code:157529
Publisher:CRC Press/Balkema
Abstract:The interference graph collected by the radial shearing interferometer does not directly reflect the original wavefront information, so one needs the wavefront reconstruction of the original wavefront. This paper deduced the iterative method for wavefront reconstruction, and conducted the numerical simulation of the wavefront reconstruction algorithm by using Matlab at different shearing ratio. The simulation results were analysed and the conclusions were: with radial shearing ratio decreases or telescope system magnification increases, only a lesser iteration number is needed to reach high precision, so we can choose proper shearing ratio to simplify the numerical computation of the tedious iterative process, improving the speed of computation; Then the analysis provides the basis for the design of the telescope system in the radial shearing interferometer. &copy; 2015 Taylor & Francis Group.
Number of references:8
Main heading:Iterative methods
Controlled terms:Computer simulation - Interferometers - MATLAB - Numerical methods - Numerical models - Shearing - Telescopes - Wavefronts
Uncontrolled terms:Interference graphs - Iteration numbers - Iterative process - Numerical computations - Radial shearing - Simulation and analysis - Wave front reconstruction - Wavefront reconstruction algorithms
Classification code:604.1  Metal Cutting - 723.5  Computer Applications - 921  Mathematics - 921.6  Numerical Methods - 941.3  Optical Instruments

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 250>

Accession number:20152100866485
Title:Hybrid tilted fiber grating based refractive index and liquid level sensing system
Authors:Yan, Zhijun (1, 2); Mou, Chengbo (1); Sun, Zhongyuan (1); Zhou, Kaimin (1); Wang, Hushan (2); Wang, Yishan (2); Zhao, Wei (2); Zhang, Lin (1)
Author affiliation:(1) Aston Institute of Photonic Technologies, Aston University, Birmingham, United Kingdom; (2) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
Corresponding author:Zhang, Lin
Source title:Optics Communications
Abbreviated source title:Opt Commun
Volume:351
Issue date:May 17, 2015
Publication year:2015
Pages:144-148
Language:English
ISSN:00304018
CODEN:OPCOB8
Document type:Journal article (JA)
Publisher:Elsevier
Abstract:We report a refractive index (RI) and liquid level sensing system based on a hybrid grating structure comprising of a 45&deg; and an 81&deg; tilted fiber gratings (TFGs) that have been inscribed into a single mode fiber in series. In this structure, the 45&deg;-TFG is used as a polarizer to filter out the transverse electric (TE) component and enable the 81&deg;-TFG operating at single polarization for RI and level sensing. The experiment results show a lower temperature cross-sensitivity, only about 7.33 pm/&deg;C, and a higher RI sensitivity, being around 180 nm/RIU at RI=1.345 and 926 nm/RIU at RI=1.412 region, which are significantly improved in comparison with long period fiber gratings. The hybrid grating structure has also been applied as a liquid level sensor, showing 3.06 dB/mm linear peak ratio sensitivity. &copy; 2015 Elsevier B.V. All rights reserved.
Number of references:33
Main heading:Refractive index
Controlled terms:Diffraction gratings - Electric appliances - Fibers - Liquids - Polarization - Refractometers - Single mode fibers
Uncontrolled terms:Hybrid grating - Liquid level sensors - Long period fiber grating - Lower temperatures - Refractive index sensor - Single polarization - Tilted fiber gratings - Transverse-electric components
Classification code:704.2  Electric Equipment - 741  Light, Optics and Optical Devices - 812  Ceramics, Refractories and Glass - 817  Plastics and Other Polymers: Products and Applications - 931.2  Physical Properties of Gases, Liquids and Solids - 941.3  Optical Instruments
DOI:10.1016/j.optcom.2015.04.038

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 251>

Accession number:20160701921752
Title:Curved optical tubes in a 4Pi focusing system
Authors:Yan, Shaohui (1); Yu, Xianghua (1, 2); Li, Manman (1, 2); Yao, Baoli (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) Graduate University of Chinese, Academy of Sciences, Beijing, China
Source title:Optics Express
Abbreviated source title:Opt. Express
Volume:23
Issue:17
Issue date:August 24, 2015
Publication year:2015
Pages:22890-22897
Language:English
E-ISSN:10944087
Document type:Journal article (JA)
Publisher:OSA - The Optical Society
Abstract:We demonstrate the possibility of creating curved optical tubes in a 4Pi focusing system. The focal fields of such optical tubes have interesting properties: the energy is concentered in the neighborhood of a prescribed three-dimensional (3D) curve while the cross section is of hollow shape. The creation of these optical tubes is based on the annular focal spot of a vortex beam, which is employed as a building block. An optical tube is thus obtained by covering the central-axis curve of the tube by various such building blocks. Each building block has a certain orientation and position, realized by a rotation plus a certain translation. The spatial spectrum (the input field as well) of the optical tube is obtained by linearly superposing the spectrum of each transformed building block. The curve is rather arbitrary. Three examples of optical tubes: a torus, a solenoid and a trefoil knot are given, showing a good agreement with the expected results. &copy; 2015 Optical Society of America.
Number of references:23
Main heading:Tubes (components)
Controlled terms:Optical constants - Optics
Uncontrolled terms:Building blockes - Central axis - Focal fields - Focusing system - Hollow shape - Spatial spectra - Threedimensional (3-d) - Vortex beams
Classification code:619.1  Pipe, Piping and Pipelines - 741.1  Light/Optics
DOI:10.1364/OE.23.022890

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 252>

Accession number:20151100646937
Title:Automatic alignment algorithm of high-power laser beam
Authors:Xu, Rui-Hua (1); He, Jun-Hua (1); Wang, Wei (1); Wang, Zheng-Zhou (1, 2); Zhang, Zhi-Jun (1); Zhao, Juan-Ning (2); Ma, Cai-Wen (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China
Corresponding author:Xu, Rui-Hua
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:44
Issue:2
Issue date:February 1, 2015
Publication year:2015
Article number:0214002
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:A quick and high-precision image center locating algorithm based on the difference between the corresponding ellipse's long and short axe method was proposed, to meeting the requirements for high precision and time-saving in real time beam automatic alignment process of the high power laser device. The maximum value of the spot's area is obtained by acting the Big Law Method, 3&times;3 Neighborhood Method and Eight-Neighborhood Method on the spot image in turn; Lengths of the long and the short axis are obtained by the analyzing the center distance of the maximum spot, and adjust the spot shape by the deviation of the ellipse's long and short axe until to the deviation approach to zero; Through analysis the deviation between the actual spot center and the corresponding reference position, the adjusting steps of stepping motor controlled by the closed-loop control method is obtained, and the automatic alignment is realized. This algorithm is verified in the high-power laser device, the experiment results shows that the alignment time of the main amplification of the optical path is shortened to 15 min, the near-field alignment accuracy is better than 0.2%, and the far-field pointing accuracy is better than 1 &mu;rad, all of them meet the alignment requirements of the high-power laser device. &copy;, 2015, Chinese Optical Society. All right reserved.
Number of references:17
Page count:6
Main heading:Alignment
Controlled terms:Algorithms - Closed loop control systems - High power lasers - Image processing - Laser beams - Optical data processing - Stepping motors
Uncontrolled terms:3 neighborhoods - Alignment accuracy - Automatic alignment - Closed-loop control - Difference method - Eight neighborhoods - Pointing accuracy - Spot centers
Classification code:601.1  Mechanical Devices - 705.3  Electric Motors - 723  Computer Software, Data Handling and Applications - 723.2  Data Processing and Image Processing - 741  Light, Optics and Optical Devices - 741.3  Optical Devices and Systems - 744.1  Lasers, General - 744.8  Laser Beam Interactions - 921  Mathematics - 961  Systems Science
DOI:10.3788/gzxb20154402.0214002

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 253>

Accession number:20151300678620
Title:Texture feature extraction of hyper-spectral image with three-dimensional gray-level co-occurrence
Authors:Wang, Shuang (1, 2); Hu, Bingliang (1); Wang, Feng (1, 3)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China; (3) Northwestern Polytechnical University, Xi'an, China
Corresponding author:Wang, Shuang
Source title:Journal of Information and Computational Science
Abbreviated source title:J. Inf. Comput. Sci.
Volume:12
Issue:4
Issue date:March 1, 2015
Publication year:2015
Pages:1439-1448
Language:English
ISSN:15487741
Document type:Journal article (JA)
Publisher:Binary Information Press
Abstract:To extract useful information of hyper-spectral images effectively, a kind of texture feature extraction method using three-dimensional Gray-level Co-occurrence Matrix (3D GLCM) is proposed in this paper. The method extracts the texture features of hyper-spectral image as a pseudo data cube that combines the two-dimensional space data with one-dimensional spectrum data, instead of each band computed alone. Moreover, the parameters related to building the 3D GLCM are all optimized. To obtain the features both in spectral space and spatial space, the moving directions of texture window are extended to the spectral space, namely that four directions in two-dimensional (2D) image space are expanded to thirteen ones in three-dimensional (3D) space. Then, the Jeffreys-matusita (JM) distance based on the class separable criterion is employed to select the most suitable window size for each object. Finally, the multi-scale texture features are used for classification. The experiments also show that, compared with the traditional methods, the feature extraction method is more effective in describing objects and has better classification accuracy. &copy;, 2015, Binary Information Press
Number of references:9
Main heading:Image texture
Controlled terms:Extraction - Feature extraction - Image processing - Spectroscopy - Textures
Uncontrolled terms:Feature extraction methods - Gray level Co occurrences - Gray level co-occurrence matrix - Hyper-spectral images - J-M distances - Texture feature extraction - Three-dimensional (3D) space - Two dimensional (2D) image
Classification code:716  Telecommunication; Radar, Radio and Television - 723.2  Data Processing and Image Processing - 801  Chemistry - 802.3  Chemical Operations - 933  Solid State Physics
DOI:10.12733/jics20105472

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 254>

Accession number:20150700522654
Title:Carbon-fiber-reinforced polymer variable-curvature mirror used for optical zoom imaging: Prototype design and experimental demonstration
Authors:Zhao, Hui (1); Fan, Xuewu (1); Pang, Zhihai (1); Ren, Guorui (1); Wang, Wei (1); Xie, Yongjie (1); Ma, Zhen (1); Du, Yunfei (1); Su, Yu (1); Wei, Jingxuan (2)
Author affiliation:(1) Chinese Academy of Sciences, Xi'An Institute of Optics and Precision Mechanics, Xi'an, China; (2) Xidian University, School of Computer Science and Technology, Xi'an, China
Corresponding author:Zhao, Hui
Source title:Optical Engineering
Abbreviated source title:Opt Eng
Volume:54
Issue:2
Issue date:February 1, 2015
Publication year:2015
Article number:025103
Language:English
ISSN:00913286
E-ISSN:15602303
CODEN:OPEGAR
Document type:Journal article (JA)
Publisher:SPIE
Abstract:In recent years, optical zoom imaging without moving elements has received much attention. The key to realizing this technique lies in the design of the variable-curvature mirror (VCM). To obtain enough optical magnification, the VCM should be able to change its radius of curvature over a wide range. In other words, the VCM must be able to provide a large sagittal variation, which requires the mirror material to be robust during curvature variation, require little force to deform, and have high ultimate strength. Carbon-fiber-reinforced polymer (CFRP) satisfies all these requirements and is suitable for fabricating such a VCM. Therefore, in this research, a CFRP prototype VCM has been designed, fabricated, and tested. With a diameter of 100 mm, a thickness of 2 mm, and an initial radius of curvature of 1740 mm, this VCM can provide a maximum 23-m sagittal variation and a minimum and maximum radius of curvature of 1705 and 1760 mm. &copy; Society of Photo-Optical Instrumentation Engineers. &copy; 2015 Society of Photo-Optical Instrumentation Engineers.
Number of references:18
Main heading:Carbon fiber reinforced plastics
Controlled terms:Carbon - Fiber reinforced plastics - Mirrors - Polymers - Reinforced plastics - Reinforcement - Strength of materials
Uncontrolled terms:Carbon fiber reinforced polymer - Curvature variation - Experimental demonstrations - Optical zoom - Prototype designs - Radius of curvature - Sagittal variation - Variable curvature mirror
Classification code:415  Metals, Plastics, Wood and Other Structural Materials - 415.2  Plastics Structural Materials - 421  Strength of Building Materials; Mechanical Properties - 422  Strength of Building Materials; Test Equipment and Methods - 741.3  Optical Devices and Systems - 804  Chemical Products Generally - 815.1  Polymeric Materials - 951  Materials Science
DOI:10.1117/1.OE.54.2.025103

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 255>

Accession number:20151000594574
Title:Design of spun high-birefringent fiber for fiber optic current sensor
Authors:Wang, Yingli (1); Kang, Menghua (1, 2); Ren, Liyong (1, 2); Ren, Kaili (1, 2)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) University of Chinese Academy Sciences, Beijing, China
Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering
Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.
Volume:44
Issue:1
Issue date:January 25, 2015
Publication year:2015
Pages:170-175
Language:Chinese
ISSN:10072276
Document type:Journal article (JA)
Publisher:Chinese Society of Astronautics
Abstract:The residual linear birefringent of sensing fiber, temperature and vibration sensitivity severely influence the accuracy of Sagnac fiber optic current sensor (S-FOCS). A sensing fiber can be used in FOCS with spun high birefringent fiber (S Hi-Bi fiber) was designed. This S Hi-Bi fiber includes three sections: two terminal sections with variable spin-rate along fiber were utilized to substitute the fiber quarter-wave plates, respectively converting the light polarization state from the linear one to the circle one, and vice versa; and the middle section with a uniform spin-rate was utilized as the current sensing fiber which maintains the circular polarization state and compress the residual linear birefringent during the light propagation. In addition, the sensing fiber was wound into a special geometric structure so that the Sagnac phase shift was inherently eliminated and the sensing result did not depend on the position of the current conductor. In theory, used the coupled-mode theory the evolution of the light polarization state was simulated when linear polarization states light incident into the sensing fiber. A novel Sagnac fiber optic current sensor with vibration insensitivity based on this spun high birefringent fibers was proposed. &copy;, 2015, Chinese Society of Astronautics. All right reserved.
Number of references:14
Main heading:Spinning (fibers)
Controlled terms:Birefringence - Fiber optic sensors - Fiber optics - Fibers - Light polarization - Optical communication - Optical devices - Optical waveguides - Phase shift - Phase shifters  - Polarization
Uncontrolled terms:Circular polarization state - Fiber design - Fiber-optic current sensor - High birefringent fiber - Linear polarization - Sagnac effect - Vibration insensitivity - Vibration sensitivity
Classification code:703.1  Electric Networks - 717.1  Optical Communication Systems - 741  Light, Optics and Optical Devices - 812  Ceramics, Refractories and Glass - 817  Plastics and Other Polymers: Products and Applications - 819.3  Fiber Chemistry and Processing - 942.2  Electric Variables Measurements

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 256>

Accession number:20155201715832
Title:Filtering and analysis on the random drift of FOG
Authors:Tian, Yun-Peng (1, 2); Yang, Xiao-Jun (1); Guo, Yun-Zeng (1); Liu, Feng (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, CAS, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9679
Monograph title:AOPC 2015: Optical Fiber Sensors and Applications
Issue date:2015
Publication year:2015
Article number:96790J
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628419047
Document type:Conference article (CA)
Conference name:Applied Optics and Photonics, China: Optical Fiber Sensors and Applications, AOPC 2015
Conference date:May 5, 2015  -  May 7, 2015
Conference location:Beijing, China
Conference code:117016
Sponsor:Chinese Society for Optical Engineering
Publisher:SPIE
Abstract:Fiber optic gyro (FOG) is an optical gyroscope which is based on the Sagnac effect and uses the optical fiber coil as light propagation channel. Gyro drift consists of two components: systemic drift and random drift. Systemic drift can be compensated by testing and calibrating. Random drift changes with time, so it becomes an important indicator to measure the precision of gyroscope, which has a great impact on the inertial navigation system. It can't be compensated by the simple method. Random drift is a main error of fiber optic gyro (FOG). The static output of FOG is a random project and it has more random noise when as the inertial navigation sensor, which will affect the measurement accuracy. It is an efficient method to reduce the random drift and improve the accuracy by modeling and compensation from the output of FOG. According to the characteristic of fiber optic gyro, the random drift model is studied. Using the time series method, the constant component of the random noise original data is extracted. After stationarity and normality tests, a normal random process is acquired. Based on this, the model is established using the recursive least squares, and then the model is applied to the normal Kalman and adaptive Kalman, finally the data is process with the filter. After experimental verification, the noise variance was reduced after filtering, and the effect is obvious. &copy; 2015 SPIE.
Number of references:12
Main heading:Gyroscopes
Controlled terms:Adaptive optics - Air navigation - Fiber optic sensors - Fiber optics - Fibers - Fog - Inertial navigation systems - Navigation - Navigation systems - Optical fibers  - Random processes - Time series
Uncontrolled terms:Adaptive Kalman - Constant components - Experimental verification - Inertial navigations - Measurement accuracy - Propagation channels - Random drift modeling - Recursive least square (RLS)
Classification code:431.5  Air Navigation and Traffic Control - 443.1  Atmospheric Properties - 741.1  Light/Optics - 741.1.2  Fiber Optics - 922.1  Probability Theory - 922.2  Mathematical Statistics
DOI:10.1117/12.2199345

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 257>

Accession number:20155201711788
Title:Image quality evaluation method for compressive imaging system
Authors:Pan, Jinfeng (1, 2, 3); Qiu, Yuehong (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China; (3) Shandong University of Technology, Zibo, China
Corresponding author:Pan, Jinfeng(pjfbysj@163.com)
Source title:Journal of Computational Information Systems
Abbreviated source title:J. Comput. Inf. Syst.
Volume:11
Issue:15
Issue date:August 1, 2015
Publication year:2015
Pages:5545-5552
Language:English
ISSN:15539105
Document type:Journal article (JA)
Publisher:Binary Information Press
Abstract:Nowadays increased efforts have been made to devise digital still and high-speed video cameras designed based on the theory of compressive sensing. It is necessary to evaluate the image quality of compressive imaging systems during there design. An image quality evaluation method mainly based on the estimated modulation transfer function of the imaging system was proposed in this paper. The method estimates the distortions of the images captured by compressive imaging systems. The results of the experiments show that the proposed method is equivalent to the well-known image quality assessment method multi-scale structural similarity (MS-SSIM). Copyright &copy; 2015 Binary Information Press.
Number of references:15
Main heading:Image quality
Controlled terms:Compressed sensing - Function evaluation - High speed cameras - Imaging systems - Modulation - Optical transfer function - Quality control - Signal reconstruction - Transfer functions - Video cameras
Uncontrolled terms:Compressive imaging - Compressive sensing - High speed video cameras - Image information - Image quality assessment - Image quality evaluation - MS-SSIM - Structural similarity
Classification code:716.1  Information Theory and Signal Processing - 741.1  Light/Optics - 742.2  Photographic Equipment - 746  Imaging Techniques - 913.3  Quality Assurance and Control - 921  Mathematics - 921.6  Numerical Methods
DOI:10.12733/jcis15039

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 258>

Accession number:20151100635486
Title:Large mode area waveguides by volume ultrafast laser photoinscription
Authors:Cheng, Guanghua (1); Liu, Xin (1); Stoian, Razvan (2)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an, China; (2) Laboratoire Hubert Curien, Universite de Lyon, Universite Jean Monnet, Saint Etienne, France
Corresponding author:Cheng, Guanghua
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9449
Volume title:International Conference on Photonics and Optical Engineering, icPOE 2014
Part number:1 of 1
Issue date:2015
Publication year:2015
Article number:944903
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628415650
Document type:Conference article (CA)
Conference name:International Conference on Photonics and Optical Engineering, icPOE 2014
Conference date:October 13, 2014  -  October 15, 2014
Conference location:Xi'an, China
Conference code:111356
Sponsor:Optics and Photonics Society of Singapore; Shaanxi Optical Society; Shaanxi Provincial Physical Society
Publisher:SPIE
Abstract:Multicore structures based on increased index waveguiding traces are fabricated by ultrafast laser photo inscription in bulk optical glass. A parametric study of the geometry of structure, number of traces and index contrast is discussed with respect to guided modes characteristics. Multicore waveguide present optical designs allowing large mode area light guiding by ultrafast laser photo inscription with coherent mode superposition in near infrared and mid-infrared in fused silica and Chalcogenide glass.. &copy; 2015 SPIE.
Number of references:13
Main heading:Waveguides
Controlled terms:Fused silica - Infrared devices - Optical glass - Photonics - Ultrafast lasers
Uncontrolled terms:Chalcogenide glass - Coherent modes - Index contrasts - Large mode area - Light guiding - Multi core - Parametric study - Photoinscription
Classification code:714.3  Waveguides - 741.3  Optical Devices and Systems - 744.1  Lasers, General - 812.3  Glass
DOI:10.1117/12.2083183

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 259>

Accession number:20151800809861
Title:Investigation on terahertz generation by controlling the laser spot size on photoconductive antenna
Authors:Li, Hui (1); Fan, Wenhui (1); Liu, Jia (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
Corresponding author:Li, Hui
Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering
Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.
Volume:44
Issue:2
Issue date:February 25, 2015
Publication year:2015
Pages:528-533
Language:English
ISSN:10072276
Document type:Journal article (JA)
Publisher:Chinese Society of Astronautics
Abstract:It was experimentally investigated that the laser spot size on photoconductive antenna (PCA) gap could have a great influence on terahertz (THz) generation. Moreover, the simulation on THz generation influenced by the laser power density was carried out, which was agreed well to the experiments. It is well demonstrated that the increase of laser power density on PCA gap can enhance THz generation. However, the intensity of THz radiation reached saturation while the laser power density exceeding a certain value. The laser power density increased further by focusing harder, but the THz radiation was getting weaker due to the smaller laser excited area on PCA gap. &copy;, 2015, Chinese Society of Astronautics. All right reserved.
Number of references:10
Main heading:Terahertz waves
Controlled terms:Antennas - Photoconductivity - Saturation (materials composition)
Uncontrolled terms:Laser power density - Laser spot size - Photoconductive antennas - Spot sizes - Terahertz generation - THz generation - THz radiation
Classification code:711  Electromagnetic Waves - 716  Telecommunication; Radar, Radio and Television - 741.1  Light/Optics - 801.4  Physical Chemistry

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 260>

Accession number:20150400445861
Title:Y<inf>2</inf>O<inf>3</inf>: Eu<sup>3+</sup>, Tb<sup>3+</sup> spherical particles based anti-reflection and wavelength conversion bi-functional films: Synthesis and application to solar cells
Authors:Miao, Hui (1, 2); Ji, Ruonan (1); Hu, Xiaoyun (1, 2); Han, Linzi (1); Hao, Yuanyuan (1); Sun, Qian (1); Zhang, Dekai (1, 2); Fan, Jun (3); Bai, Jintao (1, 2); Hou, Xun (1, 2, 4)
Author affiliation:(1) School of Physics, Northwest University, Xi'an, China; (2) National Photoelectric Technology and Functional Materials, Application of Science and Technology International Cooperation Base, Northwest University, Xi'an, China; (3) School of Chemical Engineering, Northwest University, Xi'an, China; (4) State Key Laboratory of Transient Optics and Technology, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
Corresponding author:Hu, Xiaoyun
Source title:Journal of Alloys and Compounds
Abbreviated source title:J Alloys Compd
Volume:629
Issue date:April 25, 2015
Publication year:2015
Pages:74-79
Language:English
ISSN:09258388
CODEN:JALCEU
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:In this study, Eu<sup>3+</sup> and Tb<sup>3+</sup> co-doped Y<inf>2</inf>O<inf>3</inf> particles were prepared via the simple, cost-effective urea homogeneous precipitation method without additives. The chosen particles were added in the SiO<inf>2</inf> sols to get anti-reflection (AR) and wavelength conversion bi-functional films. Careful investigations were carried out to find the optimum preparation conditions and proper morphology. SEM images showed that the particle sizes reduced as metal ion/urea ratio decreased. Additionally, the extracted particles turned from sphere to lamellar type when the deionized water, which was used as solvent, reduced to a certain extent. The mechanisms of the morphology formation and diversification were proposed as well. The as prepared materials can convert UV region photos to visible photons between 460 nm and 640 nm, which just matched the spectral response of most solar cells. The spherical sample showed better luminescence performance than the one with lamellar morphology. In addition, the optical transmittance spectra indicated that the films adding spherical particles had better anti-reflective performance, and the best adding amount was 0.08 g. Finally, As a proof-of-concept application, the as prepared bi-functional films were used to test the standard monocrystalline silicon solar cell assembled with anti-reflection and wavelength conversion bi-functional films photoelectric conversion properties. As a result, the as prepared bi-functional films could effectively improve the photoelectric conversion efficiency by 0.23% compared to pure SiO<inf>2</inf> AR coating film and 0.55% compared to glass. &copy; 2015 Elsevier B.V. All rights reserved.
Number of references:22
Main heading:Film preparation
Controlled terms:Cost effectiveness - Deionized water - Europium - Light - Metabolism - Metal ions - Monocrystalline silicon - Morphology - Photoelectricity - Precipitation (chemical)  - Silicon oxides - Silicon solar cells - Solar cells - Sols - Spheres - Urea
Uncontrolled terms:Bi-functional - Luminous properties - Optical transmittance spectrum - Photo-electric conversion efficiency - Photoelectric conversion properties - Preparation conditions - Transmittance - Urea homogeneous precipitations
Classification code:445.1  Water Treatment Techniques - 461.9  Biology - 533  Ore Treatment and Metal Refining - 547.2  Rare Earth Metals - 631  Fluid Flow - 702.3  Solar Cells - 712.1  Semiconducting Materials - 712.1.1  Single Element Semiconducting Materials - 741.1  Light/Optics - 802.3  Chemical Operations - 804  Chemical Products Generally - 804.1  Organic Compounds - 912.3  Operations Research - 951  Materials Science
DOI:10.1016/j.jallcom.2014.12.133

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 261>

Accession number:20154501514846
Title:Image compression based on GPU encoding
Authors:Bai, Zhaofeng (1, 2); Qiu, Yuehong (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9631
Monograph title:Seventh International Conference on Digital Image Processing, ICDIP 2015
Issue date:2015
Publication year:2015
Article number:96310D
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628418293
Document type:Conference article (CA)
Conference name:7th International Conference on Digital Image Processing, ICDIP 2015
Conference date:April 9, 2015  -  April 10, 2015
Conference location:Los Angeles, CA, United states
Conference code:115652
Publisher:SPIE
Abstract:With the rapid development of digital technology, the data increased greatly in both static image and dynamic video image. It is noticeable how to decrease the redundant data in order to save or transmit information more efficiently. So the research on image compression becomes more and more important. Using GPU to achieve higher compression ratio has superiority in interactive remote visualization. Contrast to CPU, GPU may be a good way to accelerate the image compression. Currently, GPU of NIVIDIA has evolved into the eighth generation, which increasingly dominates the high-powered general purpose computer field. This paper explains the way of GPU encoding image. Some experiment results are also presented. &copy; 2015 SPIE.
Number of references:10
Main heading:Image processing
Controlled terms:Digital signal processing - Encoding (symbols) - General purpose computers - Image compression
Uncontrolled terms:CUDA - Digital technologies - Dynamic videos - Encoding images - GPU - Higher compression ratios - Redundant data - Remote visualization
Classification code:722  Computer Systems and Equipment - 723.2  Data Processing and Image Processing
DOI:10.1117/12.2197078

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 262>

Accession number:20160101761464
Title:Effect of femtosecond laser micromachining on the roughness of cladding sidewalls
Authors:Li, Rui (1, 2); Yang, Xiaojun (1); Zhao, Wei (1); He, Bin (1); Li, Ming (1); Zhao, Hualong (1); Zhu, Wenyu (1); Wang, Ning (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China
Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering
Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.
Volume:44
Issue:11
Issue date:November 25, 2015
Publication year:2015
Pages:3244-3249
Language:Chinese
ISSN:10072276
Document type:Journal article (JA)
Publisher:Chinese Society of Astronautics
Abstract:In order to enhance the surface finish of Laser Direct Deposition of metallic components, a method that applies femtosecond laser to fabricate the cladding layer was proposed in this paper. The effects of the energy density, distribution, and the overlapping ratio of the laser on the sidewall quality of the cladding layer were studied in experiment. The experiment results show that the roughness of the achieved cladding side-wall layer can be smaller than 3 &mu;m once the energy density in the region is 0.12-0.34 J/cm<sup>2</sup>for the Gaussian-shape laser or 0.13-0.66 J/cm<sup>2</sup>for the rectangle-shape laser. And the cladding sidewall layer fabricated by Gaussian-shape laser possessed more excellent surface quality than the product fabricated by rectangle-shape laser with same parameters. The roughness of the cladding sidewall layer decreases and then increases with the increase of the laser overlapping ratio, and the optimal region of overlapping-ratio is 78%-85%. &copy; 2015, Editorial Board of Journal of Infrared and Laser Engineering. All right reserved.
Number of references:10
Main heading:Cladding (coating)
Controlled terms:Composite micromechanics - Micromachining - Surface roughness - Ultrashort pulses
Uncontrolled terms:Cladding layer - Femtosecond laser micromachining - Laser cladding forming - Laser direct depositions - Metallic component - Optimal regions - Overlapping ratio - Surface finishes
Classification code:604.2  Machining Operations - 931.1  Mechanics - 931.2  Physical Properties of Gases, Liquids and Solids

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 263>

Accession number:20152901043477
Title:Optical quantum random number generator based on parity of the number of photons detected in equal time intervals
Authors:Yan, Qiu-Rong (1); Zhao, Bao-Sheng (2); Zhang, Hua (1); Liao, Qing-Hong (1); Chen, Rong-Ling (1)
Author affiliation:(1) Information Engineering School, Nanchang University, Nanchang, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:44
Issue:6
Issue date:June 1, 2015
Publication year:2015
Article number:0627003
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:An optical quantum random number generator based on parity of the number of photons detected in the equal time intervals was proposed. Light emitted from a continuous wave laser diode is attenuated into discrete single-photon sequence. The single photon is detected by a single-photon avalanche photodiode module. Random bit is extracted by measuring the parity of number of photons detected in equal time interval. The random bit extraction circuit based on field programmable gate array was developed. The influences of the size of time interval and the performance parameters of single photon module on performance of the designed random number generator were analyzed. In order to achieve a random bit generator with small deviation and fast generation rate, a method of setting time interval automatically according to average counting rate was proposed. A random bit generation rate of 2 Mbit/s was obtained when the designed random number generator works on a counting rate of 20 Mcps and the equal time interval is set as 0.5 &mu;s. The random bit sequences were tested by random number test program ENT and STS. The test results show that the generated random bit sequences fully meet the standards of true random numbers, and do not require post-processin &copy;, 2015, Chinese Optical Society. All right reserved.
Number of references:21
Page count:5
Main heading:Random number generation
Controlled terms:Continuous wave lasers - Field programmable gate arrays (FPGA) - Number theory - Particle beams - Photons - Software testing
Uncontrolled terms:Information entropy - Performance parameters - Quantum random number generators - Random bit generations - Random number generators - Randomness test - Single photon detection - Single-photon avalanche photodiodes
Classification code:721.3  Computer Circuits - 723.5  Computer Applications - 741.1  Light/Optics - 744.1  Lasers, General - 921  Mathematics - 922.2  Mathematical Statistics - 932.1  High Energy Physics
DOI:10.3788/gzxb20154406.0627003

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 264>

Accession number:20150200417444
Title:Efficient Video Stitching Based on Fast Structure Deformation
Authors:Li, Jing (1); Xu, Wei (1); Zhang, Jianguo (2); Zhang, Maojun (1); Wang, Zhengming (3); Li, Xuelong (4)
Author affiliation:(1) College of Information System and Management, National University of Defense Technology, Changsha, China; (2) School of Computing, University of Dundee, Dundee, United Kingdom; (3) College of Science, National University of Defense Technology, Changsha, China; (4) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, Shaanxi, China
Source title:IEEE Transactions on Cybernetics
Abbreviated source title:IEEE Trans. Cybern.
Volume:45
Issue:12
Issue date:December 2015
Publication year:2015
Pages:2707-2719
Article number:6999967
Language:English
ISSN:21682267
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:In computer vision, video stitching is a very challenging problem. In this paper, we proposed an efficient and effective wide-view video stitching method based on fast structure deformation that is capable of simultaneously achieving quality stitching and computational efficiency. For a group of synchronized frames, firstly, an effective double-seam selection scheme is designed to search two distinct but structurally corresponding seams in the two original images. The seam location of the previous frame is further considered to preserve the interframe consistency. Secondly, along the double seams, 1-D feature detection and matching is performed to capture the structural relationship between the two adjacent views. Thirdly, after feature matching, we propose an efficient algorithm to linearly propagate the deformation vectors to eliminate structure misalignment. At last, image intensity misalignment is corrected by rapid gradient fusion based on the successive over relaxation iteration (SORI) solver. A principled solution to the initialization of the SORI significantly reduced the number of iterations required. We have compared favorably our method with seven state-of-the-art image and video stitching algorithms as well as traditional ones. Experimental results show that our method outperforms the existing ones compared in terms of overall stitching quality and computational efficiency. &copy; 2013 IEEE.
Number of references:58
Main heading:Computational efficiency
Controlled terms:Algorithms - Alignment - Computer vision - Deformation - Image matching - Iterative methods
Uncontrolled terms:Deformation vectors - Feature detection and matching - Image intensities - Number of iterations - State of the art - Structural relationship - Structure deformation - Successive over relaxation
DOI:10.1109/TCYB.2014.2381774

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 265>

Accession number:20154401475188
Title:Filtering analysis on the random noise of fiber optic guroscope
Authors:Tian, Yunpeng (1, 2); Yang, Xiaojun (1); Guo, Yunzeng (1); Liu, Feng (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, Xi'an; Shaanxi, China; (2) University of Chinese Academy of Sciences, Beijing, China
Source title:Guangxue Xuebao/Acta Optica Sinica
Abbreviated source title:Guangxue Xuebao
Volume:35
Issue:9
Issue date:September 10, 2015
Publication year:2015
Article number:0906006
Language:Chinese
ISSN:02532239
CODEN:GUXUDC
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:The datum axis of high precision photoelectric steady tracking platform jittering and drifting slowly often makes the output signal of fiber optic gyroscope (FOG) contain random noise. Based on the characteristics mentioned above, time series analysis of the data actually measured from FOG which is actually applied in engineering is conducted. Noise model is established by using the recursive least squares method, and it is processed with adaptive Kalman filter. With an exhaustive analysis by using the Allan variance method, it is shown that the filtering effect of Kalman algorithm that simply adapts the observation noise covariance matrix R is much better than that of normal Kalman algorithm, and the real-time performance is better than that of the Saga-Huga adaptive Kalman algorithm. For the Kalman algorithm, the amount of calculation added is small. This work has some practical value to improve the performance of photoelectric stable tracking platform. &copy;, 2015, Chinese Optical Society. All right reserved.
Number of references:16
Page count:6
Main heading:Gyroscopes
Controlled terms:Algorithms - Covariance matrix - Fiber optics - Least squares approximations - Photoelectricity - Time series - Time series analysis
Uncontrolled terms:Adaptive Kalman - Adaptive kalman filter - Allan variance - Fiber optic gyroscopes - Filtering effects - Observation noise - Real time performance - Recursive least squares method
Classification code:741.1  Light/Optics - 741.1.2  Fiber Optics - 921  Mathematics - 921.6  Numerical Methods - 922.2  Mathematical Statistics
DOI:10.3788/AOS201535.0906006

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 266>

Accession number:20151800807607
Title:All-fiber dual-wavelength laser delivering two types of solitons
Authors:Li, W.L. (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
Corresponding author:Li, W.L.
Source title:Laser Physics
Abbreviated source title:Laser Phys.
Volume:25
Issue:5
Issue date:May 1, 2015
Publication year:2015
Article number:055102
Language:English
ISSN:1054660X
E-ISSN:15556611
Document type:Journal article (JA)
Publisher:Institute of Physics Publishing
Abstract:We have proposed a compact all-fiber dual-wavelength laser based on a fiber Bragg grating (FBG) and semiconductor saturable absorber mirror (SESAM). The proposed laser mode locked by single-walled carbon nanotubes (SWNTs) delivers two kinds of solitons with pulse durations of &sim;1 ps and &sim;20 ps. The spectral width of the longer soliton pulses is &sim;0.14 nm, which attributes to the narrow bandwidth of the FBG. Shorter pulses with a spectral width of &sim;4 nm are mainly determined by the cavity length and intracavity dispersion. Our method provides a simple, stable, low-cost, and dual-scale ultrafast-pulsed laser source suitable for practical applications in optical communications and sensing. &copy; 2015 Astro Ltd.
Number of references:99
Main heading:Pulsed lasers
Controlled terms:Fiber Bragg gratings - Fiber lasers - Fibers - Laser mirrors - Laser mode locking - Locks (fasteners) - Mode-locked fiber lasers - Optical communication - Saturable absorbers - Semiconductor lasers  - Semiconductor saturable absorber mirrors - Single-walled carbon nanotubes (SWCN) - Solitons - Yarn
Uncontrolled terms:Dual wavelength laser - FBG - Intra-cavity dispersion - Narrow bandwidth - Optical communications and sensing - Single-walled carbon nanotube (SWNTs) - SWNT - Ultrafast pulsed lasers
Classification code:601.3  Mechanisms - 717.1  Optical Communication Systems - 741.1.2  Fiber Optics - 741.3  Optical Devices and Systems - 744  Lasers - 761  Nanotechnology - 819.4  Fiber Products - 931.3  Atomic and Molecular Physics
DOI:10.1088/1054-660X/25/5/055102

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 267>

Accession number:20151100635504
Title:Design and implementation of photoelectric rotary table data acquisition and analysis system host computer software based on VC++ and MFC
Authors:Yang, Dawei (1); Yang, Xiufang (1); Han, Junfeng (2); Yan, Xiaoxu (3)
Author affiliation:(1) Faculty of Mechanical and Precision Instrument Engineering, Xi'an University of Technology, Xi'an, China; (2) 96st Unit, 91439 Troop of the PLA, Dalian, China; (3) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
Corresponding author:Yang, Dawei
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9449
Volume title:International Conference on Photonics and Optical Engineering, icPOE 2014
Part number:1 of 1
Issue date:2015
Publication year:2015
Article number:944921
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628415650
Document type:Conference article (CA)
Conference name:International Conference on Photonics and Optical Engineering, icPOE 2014
Conference date:October 13, 2014  -  October 15, 2014
Conference location:Xi'an, China
Conference code:111356
Sponsor:Optics and Photonics Society of Singapore; Shaanxi Optical Society; Shaanxi Provincial Physical Society
Publisher:SPIE
Abstract:Photoelectric rotary table is mainly used in the defense industry and military fields, especially in the shooting range, target tracking, target acquisition, aerospace aspects play an important one. For range photoelectric measuring equipment field test application requirements, combined with a portable photoelectric rotary table data acquisition hardware system, software programming platform is presented based on the VC++, using MFC prepared PC interface, the realization of photoelectric turntable data acquisition, analysis and processing and debugging control. The host computer software design of serial communication and protocol, real-time data acquisition and display, real-time data curve drawing, analog acquisition, debugging guide, error analysis program, and gives the specific design method. Finally, through the photoelectric rotary table data acquisition hardware system alignment, the experimental results show that host computer software can better accomplish with lower machine data transmission, data acquisition, control and analysis, and to achieve the desired effect, the entire software system running performance is stable, flexible, strong practicality and reliability, the advantages of good scalability.. &copy; 2015 SPIE.
Number of references:7
Main heading:Computer software
Controlled terms:Application programs - Computer control systems - Computer debugging - Computer hardware - Computer systems programming - Data acquisition - Error analysis - Hardware - Network protocols - Photoelectricity  - Photonics - Program debugging - Reliability analysis - Software design - Software reliability - Software testing - Target tracking
Uncontrolled terms:Data acquisition and analysis system - Data acquisition hardware - Design and implementations - Measuring equipments - MFC - Real time data acquisition - Serial communications - VC
Classification code:605  Small Tools and Hardware - 712  Electronic and Thermionic Materials - 716.2  Radar Systems and Equipment - 717  Optical Communication - 722  Computer Systems and Equipment - 723  Computer Software, Data Handling and Applications - 741.1  Light/Optics - 744  Lasers - 913  Production Planning and Control; Manufacturing - 921.6  Numerical Methods
DOI:10.1117/12.2075400

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 268>

Accession number:20151800807603
Title:Quadruple-wavelength tunable and dual-wavelength switchable ultrafast fiber laser
Authors:Chen, G.W. (1); Cui, Y.D. (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
Source title:Laser Physics
Abbreviated source title:Laser Phys.
Volume:25
Issue:5
Issue date:May 1, 2015
Publication year:2015
Article number:055103
Language:English
ISSN:1054660X
E-ISSN:15556611
Document type:Journal article (JA)
Publisher:Institute of Physics Publishing
Abstract:We propose a quadruple-wavelength tunable and dual-wavelength switchable ultrafast fiber laser by incorporating four fiber Bragg gratings. The tunable operations depend on the losses induced by intracavity polarization controllers. By appropriately setting the states of PCs, quadruple-wavelength picosecond solitons can be realized at 1530, 1540, 1550 and 1560 nm, respectively. When the losses are suitable, solitons with two different wavelengths can reach the gain balance, and the dual-wavelength operations are switched among the four wavelengths. These results demonstrate that the proposed fiber laser offers potential opportunities in exploiting flexibly switchable multi-wavelength pulse sources. &copy; 2015 Astro Ltd.
Number of references:100
Main heading:Fiber Bragg gratings
Controlled terms:Carbon nanotubes - Fiber lasers - Fibers - Laser mode locking - Locks (fasteners) - Mode-locked fiber lasers - Solitons - Switches - Yarn
Uncontrolled terms:Dual wavelength - FBG - Intracavity polarization - Switchable multi wavelengths - Tunable operations - Two different wavelengths - Ultrafast fiber lasers - Wavelength tunable
Classification code:601.3  Mechanisms - 741.1.2  Fiber Optics - 741.3  Optical Devices and Systems - 744.1  Lasers, General - 744.4  Solid State Lasers - 761  Nanotechnology - 819.4  Fiber Products - 931.3  Atomic and Molecular Physics
DOI:10.1088/1054-660X/25/5/055103

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 269>

Accession number:20152600969176
Title:Effect of interface layer on the performance of high power diode laser arrays
Authors:Zhang, Pu (1); Wang, Jingwei (2); Xiong, Lingling (1); Li, Xiaoning (1, 3); Hou, Dong (2); Liu, Xingsheng (1, 2)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, 17 Xinxi Road, Xi'an, Shaanxi, China; (2) Focuslight Technologies Co. LTD, 60 Xibu Road, Xi'an, Shaanxi, China; (3) Key Laboratory for Physical Electronics and Devices, Shaanxi Key Lab of Information Photonic Technique, Xi'An Jiaotong University, Xianning West Road, Xi'an, Shaanxi, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9346
Volume title:Components and Packaging for Laser Systems
Part number:1 of 1
Issue date:2015
Publication year:2015
Article number:934607
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628414363
Document type:Conference article (CA)
Conference name:Components and Packaging for Laser Systems
Conference date:February 9, 2015  -  February 12, 2015
Conference location:San Francisco, CA, United states
Conference code:112114
Sponsor:The Society of Photo-Optical Instrumentation Engineers (SPIE)
Publisher:SPIE
Abstract:Packaging is an important part of high power diode laser (HPLD) development and has become one of the key factors affecting the performance of high power diode lasers. In the package structure of HPLD, the interface layer of die bonding has significant effects on the thermal behavior of high power diode laser packages and most degradations and failures in high power diode laser packages are directly related to the interface layer. In this work, the effects of interface layer on the performance of high power diode laser array were studied numerically by modeling and experimentally. Firstly, numerical simulations using finite element method (FEM) were conducted to analyze the effects of voids in the interface layer on the temperature rise in active region of diode laser array. The correlation between junction temperature rise and voids was analyzed. According to the numerical simulation results, it was found that the local temperature rise of active region originated from the voids in the solder layer will lead to wavelength shift of some emitters. Secondly, the effects of solder interface layer on the spectrum properties of high power diode laser array were studied. It showed that the spectrum shape of diode laser array appeared "right shoulder" or "multi-peaks", which were related to the voids in the solder interface layer. Finally, "void-free" techniques were developed to minimize the voids in the solder interface layer and achieve high power diode lasers with better optical-electrical performances. &copy; 2015 SPIE.
Number of references:11
Main heading:Semiconductor lasers
Controlled terms:Diodes - Finite element method - Laser beam welding - Numerical methods - Numerical models - Packaging
Uncontrolled terms:Diode laser array - Electrical performance - High power diode laser - High-power diode laser arrays - Interface layer - Junction temperatures - Spectrum - Voids
Classification code:694.1  Packaging, General - 714.2  Semiconductor Devices and Integrated Circuits - 744.9  Laser Applications - 921  Mathematics - 921.6  Numerical Methods
DOI:10.1117/12.2077029

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 270>

Accession number:20161102095258
Title:A Single-Ring Absolute Encoder Subdivision Method
Authors:Xiaogang, Su (1, 2); Xiaodong, Hu (1); Zhang, Xiaodong (1)
Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xian, Shaanxi, China; (2) University of Chinese, Academy of Sciences, Beijing, China
Source title:Proceedings - 2015 7th International Conference on Measuring Technology and Mechatronics Automation, ICMTMA 2015
Abbreviated source title:Proc. - Int. Conf. Meas. Technol. Mechatronics Autom., ICMTMA
Monograph title:Proceedings - 2015 7th International Conference on Measuring Technology and Mechatronics Automation, ICMTMA 2015
Issue date:September 11, 2015
Publication year:2015
Pages:55-58
Article number:7263513
Language:English
ISBN-13:9781467371438
Document type:Conference article (CA)
Conference name:7th International Conference on Measuring Technology and Mechatronics Automation, ICMTMA 2015
Conference date:June 13, 2015  -  June 14, 2015
Conference location:Nanchang, Jiangxi, China
Conference code:118120
Sponsor:Central South University of Forest and Technology; Hunan Institute of Industry; Institute of Spatial Information Technology; Shenzhen Research Institute of Central South University
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:The basic working principle of single-ring absolute photoelectric shaft encoder is to use light-emitting diode as light source to illuminate the encoder, at the same time using linear CCD as photoelectric signal receiving device and subdivision device. So the essence of single ring absolute encoder subdivision technology is based on line array CCD subdivision technology. This paper proposes a linear CCD subdivision algorithm Based on polynomial interpolation method. By computing the center of the bar code to get value of accurate positioning, this calculates the center of the coded disc line. As a result of the existence of encoder's characterization error, this article adopts the average operation of multiple line center position to get the precise localization of encoder center line. So as to achieve the aim of improve the barcode location accuracy, and can realize in the application of engineering to achieve the precision of 1 ". &copy; 2015 IEEE.
Number of references:6
Main heading:Light emitting diodes
Controlled terms:Bar codes - Interpolation - Light sources - Photoelectricity - Precision engineering
Uncontrolled terms:Absolute encoders - Line-array ccds - Location accuracy - Photoelectric signals - Polynomial interpolation - Single ring encoder - Subdivision algorithms - Subdivision methods
Classification code:701.1  Electricity: Basic Concepts and Phenomena - 714.2  Semiconductor Devices and Integrated Circuits - 723.2  Data Processing and Image Processing - 921.6  Numerical Methods
DOI:10.1109/ICMTMA.2015.21

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 271>

Accession number:20151300692218
Title:Influence of vibration in the airborne celestial navigation system on navigation accuracy
Authors:Dong, Qiang (1, 2); Ma, Caiwen (1); Li, Yan (1); Yang, Xiaoxu (1); Yuan, Hui (1, 2)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China
Corresponding author:Dong, Qiang
Source title:Harbin Gongcheng Daxue Xuebao/Journal of Harbin Engineering University
Abbreviated source title:Harbin Gongcheng Daxue Xuebao
Volume:36
Issue:2
Issue date:February 25, 2015
Publication year:2015
Pages:209-212
Language:Chinese
ISSN:10067043
CODEN:HGHPF2
Document type:Journal article (JA)
Publisher:Editorial Board of Journal of Harbin Engineering
Abstract:For the issue of the influence of aircraft vibration on the navigation system positioning accuracy based on airborne autonomous celestial navigation system, an analysis of navigation platform vibration influenced from aircraft was preceded. Furthermore, a conclusion was given that the main factor is vibration angular displacement. Next, a single stellar positioning model in the celestial navigation system was established. According to the characteristics of vibration angular displacement, the similar coordinate transformation matrix in the angular displacement compensation was given. The results of vibration experiment and positioning model simulation validated that the angular vibration is the main error propagation to navigation system platform. The positioning error of celestial navigation system is 600 m when vibration angular displacement is 200 s along the x and y axis. &copy;, 2015, Editorial Board of Journal of HEU. All right reserved.
Number of references:9
Main heading:Vibration analysis
Controlled terms:Air navigation - Linear transformations - Navigation systems - Stars
Uncontrolled terms:Angular displacement - Celestial navigation - Celestial Navigation System - Characteristics of vibrations - Co-ordinate transformation - Positioning accuracy - Single stellar positioning - Vibration
Classification code:431.5  Air Navigation and Traffic Control - 657.2  Extraterrestrial Physics and Stellar Phenomena - 921.3  Mathematical Transformations - 943.2  Mechanical Variables Measurements
DOI:10.3969/j.issn.1006-7043.201404048

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 272>

Accession number:20155201717816
Title:Research on the high-brightness traffic variable message sign based on laser diodes
Authors:Feng, Li-Li (1, 2); Huang, Hai-Tao (3); Ruan, Chi (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, CAS, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China; (3) China Academy of Transportation Sciences, Beijing, China
Corresponding author:Ruan, Chi(ruanchi@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9672
Monograph title:AOPC 2015: Advanced Display Technology; and Micro/Nano Optical Imaging Technologies and Applications
Issue date:2015
Publication year:2015
Article number:967202
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628418972
Document type:Conference article (CA)
Conference name:Applied Optics and Photonics, China: Advanced Display Technology; and Micro/Nano Optical Imaging Technologies and Applications, AOPC 2015
Conference date:May 5, 2015  -  May 7, 2015
Conference location:Beijing, China
Conference code:117011
Sponsor:Chinese Society for Optical Engineering
Publisher:SPIE
Abstract:Researches indicate that foggy weather is one of the most critical factors that restrict human's traffic activities and cause traffic accidents. It will reduce the visibility of traffic message board, which could cause the insecurity of transportation. Commonly, light-emitting diodes (LEDs) were used as light source for variable message sign, which could not be seen clearly in the foggy low visibility condition. A high-brightness light source which could be used for variable information board was firstly put forward in this paper. And a new type of variable message sign used in low visibility condition was also introduced. Besides, the attenuation characteristics of laser diode (LD) and light-emitting diode (LED) were analyzed respectively. Calculation and simulation show that the attenuation of red light source is fastest, and the yellow LED light has the better transmittance property. In the experiment, LDs were used to make variable message board for verifying image definition. A 16&lowast;16 array structure composed of LDs was designed and could display Chinese characters. By comparing the display effect of LDs and LEDs driven with same power, they were placed in fog chamber of the visibility less than 5 meters. And experiment results show that the penetrability of red LD light is better than that of red LED. So traffic variable message sign based on LDs could improve the image definition and the information could be seen more clearly in the foggy weather. In addition to the high-brightness, good coherence, good direction, experimental results show that traffic variable message board based on LD has better visual effect in low visibility condition. &copy; COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.
Number of references:12
Main heading:Light emitting diodes
Controlled terms:Advanced traveler information systems - Diodes - Display devices - Imaging techniques - Light - Light sources - Luminance - Optical image storage - Semiconductor lasers - Variable message signs  - Visibility
Uncontrolled terms:Attenuation characteristics - Chinese characters - Critical factors - High brightness - Low visibility conditions - Traffic activities - Traffic variables - Variable message sign (VMS)
Classification code:406.1  Highway Systems - 432.4  Highway Traffic Control - 714.2  Semiconductor Devices and Integrated Circuits - 722.1  Data Storage, Equipment and Techniques - 722.2  Computer Peripheral Equipment - 741.1  Light/Optics - 741.2  Vision - 744.4.1  Semiconductor Lasers - 746  Imaging Techniques
DOI:10.1117/12.2196782

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 273>

Accession number:20155201717464
Title:Design of the relay lens for infrared system coupled with imaging fiber bundle
Authors:Yan, Xingtao (1); Li, Fu (1); Yang, Jianfeng (1); Xue, Bin (1); Ma, Xiaolong (1); Lv, Juan (1); He, Yinghong (1); Zhao, Yiyi (1)
Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shaanxi Xi'an, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9676
Monograph title:AOPC 2015: Optical Design and Manufacturing Technologies
Issue date:2015
Publication year:2015
Article number:96760F
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628419016
Document type:Conference article (CA)
Conference name:Applied Optics and Photonics, China: Optical Design and Manufacturing Technologies, AOPC 2015
Conference date:May 5, 2015  -  May 7, 2015
Conference location:Beijing, China
Conference code:117014
Sponsor:Chinese Society for Optical Engineering
Publisher:SPIE
Abstract:Relay lens is an important element for infrared system coupled with imaging fiber bundle. According to the basic composition and structural characteristics of infrared system coupled with imaging fiber bundle, this paper put forward the general principle and method of its relay lens design, then a material relay lens has been designed by ZEMAX with definite performance index. It has a working spectral coverage from 3.7&mu;m to 4.8&mu;m, focal length of 33.5mm, magnification of-0.6, linear field of view of 12mm, objective numerical aperture of 0.15. It is objective telecentric and is adapted to the relay of infrared detector and imaging fiber bundle. The total lens has two aspheric surfaces and only four pieces of singlet. Its MTF value is 0.7@17 lp/mm, and distortion is-0.19%. After necessary tolerance analysis and structural design, this relay lens has been fabricated. The optical performances fulfill the design requirements and clear images have been got by this lens. These prove the validity and rationality of the design method. It gives a foundational guidance for such relay lens design. &copy; 2015 SPIE.
Number of references:9
Main heading:Lenses
Controlled terms:Aspherics - Design - Fibers - Fits and tolerances - Infrared devices - Manufacture - Optical design - Optical instrument lenses
Uncontrolled terms:Cold stop - Imaging fiber bundle - Infrared systems - Numerical aperture - Optical performance - Performance indices - Relay lens - Structural characteristics
Classification code:537.1  Heat Treatment Processes - 741.1  Light/Optics - 741.3  Optical Devices and Systems
DOI:10.1117/12.2197992

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 274>

Accession number:20150700515274
Title:Feature competition and partial sparse shape modeling for cardiac image sequences segmentation
Authors:Qin, Xianjing (1, 2); Tian, Yan (1); Yan, Pingkun (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, Shaanxi, China; (2) University of Chinese Academy of Sciences, China
Corresponding author:Yan, Pingkun
Source title:Neurocomputing
Abbreviated source title:Neurocomputing
Volume:149
Issue:PB
Issue date:February 3, 2015
Publication year:2015
Pages:904-913
Language:English
ISSN:09252312
E-ISSN:18728286
CODEN:NRCGEO
Document type:Journal article (JA)
Publisher:Elsevier
Abstract:The segmentation of endocardium and epicardium of left ventricle (LV) in cardiac MR image sequences play a crucial role in clinical applications. Active shape model (ASM) based methods are often used to extract the LV boundaries with the steps of searching and representation. However, due to the challenges, such as interior papillary muscles, complicated outside tissues and weak boundaries, the searching may be partially incorrect and the representation cannot reflect the reliable part of the contour. In this paper, a feature competition based searching strategy is proposed by exploiting both the information of the object and background to reduce the error of searching. Then, we propose a partial sparse shape model to effectively represent the searched shape. This representation is able to retain the partial reliable contour while reconstructing the unreliable part approximating to the real contour. Moreover, the incremental learning algorithm is exploited to construct a patient-specific appearance model to increase the accuracy and efficiency of image sequence segmentation. Experimental results on cardiac MR image sequences demonstrate that the proposed method improves the segmentation performance and also reduces the error accumulation compared to the existing methods. &copy; 2014 Elsevier B.V.
Number of references:26
Main heading:Image segmentation
Controlled terms:Computer vision - Face recognition - Heart - Magnetic resonance imaging
Uncontrolled terms:Active shape model - Appearance modeling - Clinical application - Image sequence - Incremental learning - Searching strategy - Segmentation performance - Shape model
Classification code:461.2  Biological Materials and Tissue Engineering - 716  Telecommunication; Radar, Radio and Television - 723.5  Computer Applications - 741.1  Light/Optics - 746  Imaging Techniques
DOI:10.1016/j.neucom.2014.07.044

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 275>

Accession number:20151400717937
Title:Microstructure and chemical bond evolution of diamond-like carbon films machined by femtosecond laser
Authors:Wang, Jing (1); Wang, Chunhui (1); Liu, Yongsheng (1); Cheng, Laifei (1); Li, Weinan (2); Zhang, Qing (1); Yang, Xiaojun (2)
Author affiliation:(1) Science and Technology on Thermostructure Composite Materials Laboratory, Northwestern Polytechnical University, Xi'an, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China
Corresponding author:Liu, Yongsheng
Source title:Applied Surface Science
Abbreviated source title:Appl Surf Sci
Volume:340
Issue date:June 15, 2015
Publication year:2015
Pages:49-55
Language:English
ISSN:01694332
CODEN:ASUSEE
Document type:Journal article (JA)
Publisher:Elsevier
Abstract:Femtosecond laser is of great interest for machining high melting point and hardness materials such as diamond-like carbon, SiC ceramic, et al. In present work, the microstructural and chemical bond evolution of diamond-like carbon films were investigated using electron microscopy and spectroscopy techniques after machined by diverse femtosecond laser power in air. The results showed the machining depth was essentially proportional to the laser power. The well patterned microgrooves and ripple structures with nanoparticles were formed distinctly in the channels. Considering the D and G Raman band parameters on the laser irradiation, it revealed a conversion from amorphous carbon to nanocrystalline graphite after laser treated with increasing laser power. X-ray photoelectron spectroscopy analysis showed a great decrease of sp<sup>3</sup>/sp<sup>2</sup> after laser treatment. &copy; 2015 Elsevier B.V. All rights reserved.
Number of references:56
Main heading:Diamond like carbon films
Controlled terms:Amorphous carbon - Carbon - Carbon films - Chemical bonds - Diamonds - Microstructure - Nanocrystals - Silicon carbide - Ultrashort pulses - X ray photoelectron spectroscopy
Uncontrolled terms:Diamond like carbon - High melting point - Laser power - Laser treatment - Machining techniques - Micro-structural - Nanocrystalline graphite - Ripple structure
Classification code:482.2.1  Gems - 712  Electronic and Thermionic Materials - 744.1  Lasers, General - 761  Nanotechnology - 801  Chemistry - 801.4  Physical Chemistry - 804  Chemical Products Generally - 804.2  Inorganic Compounds - 813.2  Coating Materials
DOI:10.1016/j.apsusc.2015.02.169

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 276>

Accession number:20151400720842
Title:Evaluation and analysis of pre-oxidation extent of polyacrylonitrile fiber
Authors:Gu, Hongxing (1, 2); Wang, Haojing (1); Fan, Lidong (1); Xue, Linbing (1); Zhao, Youjun (1)
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; Shaanxi, China; (2) University of Chinese Academy of Sciences, Beijing, China
Corresponding author:Wang, Haojing
Source title:Huagong Xuebao/CIESC Journal
Abbreviated source title:Huagong Xuebao
Volume:66
Issue:3
Issue date:March 1, 2015
Publication year:2015
Pages:1228-1233
Language:Chinese
ISSN:04381157
CODEN:HUKHAI
Document type:Journal article (JA)
Publisher:Chemical Industry Press
Abstract:Polyacrylonitrile (PAN) precursor fiber and pre-oxidized fiber were tested with Fourier transform infrared spectroscopy (FTIR) and differential scanning calorimetry (DSC) to investigate the accuracy of pre-oxidation extent which was measured by testing. On the basis of the study on influence factors during the FTIR test, FTIR spectra and relative cyclization index (RCI) were analyzed. Furthermore, aromatization index (AI) was also studied via comparing the thermal properties of precursor fiber and pre-oxidized fiber. The pre-oxidation extent of pre-oxidized fiber could be qualitatively evaluated by FTIR and DSC, while RCI by quantitative calculation was not comparable and AI was higher than the true value. &copy;, 2015, Chemical Industry Press. All right reserved.
Number of references:17
Main heading:Fourier transform infrared spectroscopy
Controlled terms:Differential scanning calorimetry - Fibers - Hybrid materials - Oxidation - Thermodynamic properties
Uncontrolled terms:Analysis - Evaluation and analysis - FT-IR spectrum - Polyacrylonitrile fiber - Polyacrylonitrile precursor fibers - Pre-oxidation - Precursor fibers - Quantitative calculation
Classification code:415  Metals, Plastics, Wood and Other Structural Materials - 641.1  Thermodynamics - 712  Electronic and Thermionic Materials - 801  Chemistry - 802.2  Chemical Reactions - 812  Ceramics, Refractories and Glass - 817  Plastics and Other Polymers: Products and Applications - 933  Solid State Physics
DOI:10.11949/j.issn.0438-1157.20141369

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 277>

Accession number:20150700534153
Title:Adaptive multi-bit quantization for hashing
Authors:Deng, Cheng (1); Deng, Huiru (1); Liu, Xianglong (2); Yuan, Yuan (3)
Author affiliation:(1) Department of Electronic and Engineering, Xidian University, Xi'an, China; (2) State Key Lab of SDE, Beihang University, Beijing, China; (3) Center for OPTical IMagery Analysis and Learning (OPTIMAL), Xian Institute of Optics and Precision Mechanics, CAS, Xian, China
Corresponding author:Liu, Xianglong
Source title:Neurocomputing
Abbreviated source title:Neurocomputing
Volume:151
Issue:P1
Issue date:2015
Publication year:2015
Pages:319-326
Language:English
ISSN:09252312
E-ISSN:18728286
CODEN:NRCGEO
Document type:Journal article (JA)
Publisher:Elsevier
Abstract:Recently, hashing methods which try to solve similarity-preserving approximate nearest search problem have obtained widely applications in various fields such as content-based image retrieval, object recognition and pose estimation. However, how to learn effective hash codes to describe the similarities in the large-scale database still remains as a NP-hard problem. Besides, a fatal problem lying in the existing hashing methods is that they usually threshold the real values to binary codes using single-bit quantization (SBQ) at the highest point density, which may destroy the data structure seriously. Due to this problem, double-bit quantization (DBQ) is proposed to solve the problem of SBQ by adaptively learning thresholds to quantize the real values to two bits, and achieves impressive results. However, one problem in DBQ is that it neglects the amount of the information contained in different data dimensions. In this paper, we propose a multi-bit quantization method based on bit allocation to quantize each projected dimension with variable bit numbers. Besides, different from existing methods of choosing threshold, we propose an incomplete coding manner by clustering to generate binary codes. Experiments on two large datasets demonstrate the feasibility of our method. &copy; 2014 Elsevier B.V.
Number of references:33
Main heading:Problem solving
Controlled terms:Binary codes - Codes (symbols) - Computational complexity - Content based retrieval - Hash functions - Image coding - Image retrieval - Object recognition
Uncontrolled terms:Bit allocation - Content based image retrieval - Incomplete coding - K-means clustering - Large-scale database - Multi-bit quantization - Similarity preserving - Single bit quantization
Classification code:716  Telecommunication; Radar, Radio and Television - 721.1  Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory - 723  Computer Software, Data Handling and Applications - 921  Mathematics
DOI:10.1016/j.neucom.2014.09.033

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 278>

Accession number:20153301166074
Title:Burst-mode operation of a 655GHz mode locked laser based on an 11-th order microring resonator
Authors:Jin, Li (1); Pasquazi, Alessia (2); Tsang, K.S. (3); Ho, Victor (1); Peccianti, Marco (2); Cooper, Andrew (2); Caspani, Lucia (4, 5); Ferrera, Marcello (5); Little, Brent E. (6); Moss, David J. (7); Morandotti, Roberto (4); Chu, Sai T. (1)
Author affiliation:(1) City University of Hong Kong, Kowloon Tong, Hong Kong; (2) Department of Physics and Astronomy, University of Sussex, Falmer, Brighton, United Kingdom; (3) Polytechnic University of Hong Kong, Hunghom, Hong Kong; (4) INRS - &Eacute;nergie, Matriaux et T&eacute;l&eacute;communications, 1650 Blvd Lionel Boulet, Varennes; QC, Canada; (5) School of Engineering and Physical Sciences, Heriot-Watt University, David Brewster Building, Edinburgh, Scotland, United Kingdom; (6) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an, China; (7) School of Electrical and Computer Engineering, RMIT University, Melbourne; VIC, Australia
Source title:Integrated Photonics Research, Silicon and Nanophotonics, IPRSN 2015
Abbreviated source title:Integr. Photonics Res., Silicon and Nanophotonics, IPRSN 2015
Monograph title:Integrated Photonics Research, Silicon and Nanophotonics, IPRSN 2015
Issue date:2015
Publication year:2015
Pages:371p
Article number:IT2B.3
Language:English
ISBN-13:9781557520005
Document type:Conference article (CA)
Conference name:Integrated Photonics Research, Silicon and Nanophotonics, IPRSN 2015
Conference date:June 27, 2015  -  July 1, 2015
Conference location:Boston, MA, United states
Sponsor:Amercian Elements; LUCEDA Photonics; Optiwave Systems, Inc.; SwissLitho; Synopsys
Publisher:Optical Society of America (OSA)
Abstract:We demonstrate a new regime for ultrafast mode-locked lasers termed "burst-mode". By exploiting an integrated 11th-order microring resonator, a stable mode-locked pulse train at 655GHz with an envelope of 42ps at 6.45MHz is achieved. &copy; 2015 OSA.
Number of references:9
Main heading:Mode-locked fiber lasers
Controlled terms:Lasers - Locks (fasteners) - Nanophotonics - Optical resonators - Photonics - Resonators
Uncontrolled terms:A-stable - Burst mode - Burst-mode operation - Microring resonator - Mode-locked laser - Ultra-fast
Classification code:601.3  Mechanisms - 741.1  Light/Optics - 741.3  Optical Devices and Systems - 744.1  Lasers, General

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 279>

Accession number:20155201717484
Title:Design of infrared diffractive telescope imaging optical systems
Authors:Zhang, Zhoufeng (1, 2, 3); Hu, Bingliang (1); Yin, Qinye (2); Xie, Yongjun (1); Kang, Fuzeng (1); Wang, Yanjun (1)
Author affiliation:(1) Xian Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xian, China; (2) Xian Jiaotong University, Xian, China; (3) Graduate University of Chinese Academy of Sciences, China
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:9676
Monograph title:AOPC 2015: Optical Design and Manufacturing Technologies
Issue date:2015
Publication year:2015
Article number:96760Z
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781628419016
Document type:Conference article (CA)
Conference name:Applied Optics and Photonics, China: Optical Design and Manufacturing Technologies, AOPC 2015
Conference date:May 5, 2015  -  May 7, 2015
Conference location:Beijing, China
Conference code:117014
Sponsor:Chinese Society for Optical Engineering
Publisher:SPIE
Abstract:Diffractive telescope is an updated imaging technology, it differs from conventional refractive and reflective imaging system, which is based on the principle of diffraction image. It has great potential for developing the larger aperture and lightweight telescope. However, one of the great challenges of design this optical system is that the diffractive optical element focuses on different wavelengths of light at different point in space, thereby distorting the color characteristics of image. In this paper, we designs a long-wavelength infrared diffractive telescope imaging system with flat surface Fresnel lens and cancels the infrared optical system chromatic aberration by another flat surface Fresnel lens, achieving broadband light(from 8&mu;m-12&mu;m) to a common focus with 4.6&deg; field of view. At last, the diffuse spot size and MTF function provide diffractive-limited performance. &copy; 2015 SPIE.
Number of references:9
Main heading:Aberrations
Controlled terms:Design - Imaging systems - Imaging techniques - Infrared devices - Infrared radiation - Lenses - Light - Manufacture - Optical design - Optical instrument lenses  - Optical systems - Telescopes
Uncontrolled terms:Chromatic aberration - Color characteristics - Color correction - Imaging optical systems - Infrared optical systems - Lightweight telescope - Long wave infrared - Long-wavelength infrared
Classification code:537.1  Heat Treatment Processes - 741.1  Light/Optics - 741.3  Optical Devices and Systems - 746  Imaging Techniques
DOI:10.1117/12.2201125

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 280>

Accession number:20160701912158
Title:Unsupervised feature learning for scene classification of high resolution remote sensing image
Authors:Fu, Min (1, 2); Yuan, Yuan (1); Lu, Xiaoqiang (1)
Author affiliation:(1) Center for OPTical IMagery Analysis and Learning (OPTIMAL), State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Xi'an Shaanxi, China; (2) University of the Chinese Academy of Sciences, 19A Yuquanlu, Beijing, China
Corresponding author:Lu, Xiaoqiang
Source title:2015 IEEE China Summit and International Conference on Signal and Information Processing, ChinaSIP 2015 - Proceedings
Abbreviated source title:IEEE China Summit Int. Conf. Signal Inf. Process., ChinaSIP - Proc.
Monograph title:2015 IEEE China Summit and International Conference on Signal and Information Processing, ChinaSIP 2015 - Proceedings
Issue date:August 31, 2015
Publication year:2015
Pages:206-210
Article number:7230392
Language:English
ISBN-13:9781479919482
Document type:Conference article (CA)
Conference name:IEEE China Summit and International Conference on Signal and Information Processing, ChinaSIP 2015
Conference date:July 12, 2015  -  July 15, 2015
Conference location:Chengdu, China
Conference code:117267
Sponsor:Institute of Electrical and Electronics Engineers Signal Processing Society (SPS)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:Due to the rapid development of various satellite sensors, a large amount of high resolution remote sensing images can be obtained. In order to efficiently represent the scenes from these high resolution images, an unsupervised feature learning method is proposed for high resolution image scene classification. In the proposed method, a set of filter banks are learned in an unsupervised manner from the unlabeled image patches, which are robust, efficient and do not need elaborately designed descriptors such as SIFT. And then, each image is encoded by these filter banks using a soft distance assignment scheme, generating a final feature vector to excellently represent the image scene. Finally, by virtue of the traditional SVM classifier, the sematic concepts of different scenes can be categorized. Experimental evaluation on the the high resolution remote sensing images demonstrates the effectiveness and good performance of the proposed method. &copy; 2015 IEEE.
Number of references:21
Main heading:Image classification
Controlled terms:Classification (of information) - Filter banks - Image reconstruction - Information science - Remote sensing
Uncontrolled terms:Experimental evaluation - Feature vectors - High resolution image - High resolution remote sensing images - Satellite sensors - Scene classification - SVM classifiers - Unsupervised feature learning
Classification code:703.2  Electric Filters - 716.1  Information Theory and Signal Processing
DOI:10.1109/ChinaSIP.2015.7230392

Database:Compendex
Compilation and indexing terms, Copyright 2016 Elsevier Inc.

<RECORD 281>

Accession number:20152400941786
Title:Investigations on the photoluminescence spectra and its defect-related nature for the ultraviolet transmitting fluoride-containing phosphate-based glasses
Authors:Feng, Dandan (3); He, Quanlong (1, 2); Lu, Min (1); Li, Weinan (1); Song, Weiwei (4); Wang, Pengfei (1); Peng, Bo (1)
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences (CAS), Xi'an, China; (2) University of Chinese Academy of Sciences (UCAS), Beijing, China; (3) Key Lab for Advanced Ceramics and Machining Technology, School of Materials Science and Engineering, Tianjin University, Tianjin, China; (4) Institute of Materials Physics, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin, China
Corresponding author:Wang, Pengfei
Source title:Journal of Non-Crystalline Solids
Abbreviated source title:J Non Cryst Solids
Volume:425
Issue date:June 15, 2015
Publication year:2015
Pages:130-137
Article number:17462
Language:English
ISSN:00223093
CODEN:JNCSBJ
Document type:Journal article (JA)
Publisher:Elsevier
Abstract:Abstract Two types of fluoride-containing phosphate-based glasses were prepared under the reducing and ambient air atmosphere, respectively. And the interrelation between the micro-defects and luminescence for these glasses was investigated by studying their absorption, photoluminescence emission (PL) and excitation (PLE) spectra as well as electron spin resonance (ESR) spectra. The emission spectra under the excitation at 351 nm and the excitation spectra by monitoring the emission wavelength at 433 nm, 454 nm, 505 nm, 645 nm and 780 nm, together with the absorption spectra of these two types of glasses were investigated through Gaussian peak fitting method. Their photoluminescence spectra exhibit a general character with a broadband emission at around 430 nm and a minor band at around 645 nm. The photoluminescence excitation spectra and absorption spectra indicate that the Gaussian peak fitting of the emission spectra with the maximum at about 433, 455, 505 and 645 nm, respectively, are closely associated with phosphate-related oxygen hole center defects and fluorine-related color centers. In addition, the emission and excitation spectra of the glass samples after the thermal treatment process in hydrogen atmosphere manifest that the reducing conditions promote the formation of phosphate-related oxygen hole center defects, oxygen related hole center defects and fluorine-related non-paramagnetic color centers as well as PO&lt;inf&gt;4&lt;/inf&gt;&lt;sup&gt;3 -&lt;/sup&gt; defects, while decrease the concentration level of Fe&lt;sup&gt;3 +&lt;/sup&gt; and PO&lt;inf&gt;3&lt;/inf&gt;&lt;sup&gt;2 -&lt;/sup&gt; defects. The investigations on the glasses' photoluminescence properties and their changes with the glass melting and thermal treatment atmosphere will promote the further development in preparation technology of the fluoride-containing phosphate-based glasses. &copy; 2015 Elsevier B.V.
Number of references:43
Main heading:Electron spin resonance spectroscopy
Controlled terms:Absorption spectra - Color centers - Defects - Electromagnetic wave absorption - Excited states - Fluorine - Fluorine compounds - Glass - Glass manufacture - Heat treatment  - Hole concentration - Magnetic moments - Oxygen - Photoluminescence
Uncontrolled terms:Intrinsic defects - Phosphate based glass - Photoluminescence emission - Photoluminescence excitation spectrum - Photoluminescence properties - Photoluminescence spectrum - Preparation technology - Thermal treatment process