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<RECORD 1>

 

Accession number:20114314454198

Title:Finite element analysis of large mirror based contact theory

Authors:Wu, Meng Yuan (1); Li, Ying Cai (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of CAS, XIOPM, Xi'an, China

Corresponding author:Wu, M.Y.(wmy@opt.ac.cn)

Source title:2011 2nd International Conference on Mechanic Automation and Control Engineering, MACE 2011 - Proceedings

Abbreviated source title:Int. Conf. Mech. Autom. Control Eng., MACE - Proc.

Monograph title:2011 2nd International Conference on Mechanic Automation and Control Engineering, MACE 2011 - Proceedings

Issue date:2011

Publication year:2011

Pages:4964-4966

Article number:5988129

Language:Chinese

ISBN-13:9781424494392

Document type:Conference article (CA)

Conference name:2011 2nd International Conference on Mechanic Automation and Control Engineering, MACE 2011

Conference date:July 15, 2011 - July 17, 2011

Conference location:Inner Mongolia, China

Conference code:87002

Publisher:IEEE Computer Society, 445 Hoes Lane - P.O.Box 1331, Piscataway, NJ 08855-1331, United States

Abstract:This paper describe the finite element analysis of large mirror based on contact theory. After several modules' computing author compared the calculated Result and test result, and make a conclusion that contact analyzing is more accurate than linear analysis for large mirror. &copy; 2011 IEEE.

Number of references:7

Main heading:Finite element method

Controlled terms:Mechanics - Mirrors - Optical testing

Uncontrolled terms:Contact theory - Large mirror - Linear analysis - Test results - Wavefront aberration

Classification code:741.3 Optical Devices and Systems - 921.6 Numerical Methods - 931.1 Mechanics

DOI:10.1109/MACE.2011.5988129

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 2>

 

Accession number:20110913706206

Title:Generation of 10-GHz ultra-short pulses with low time jitter in an actively mode-locked fiber laser

Authors:Feng, H. (1); Zhao, W. (1); Yan, S. (1); Xie, X.P. (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 710119, China

Corresponding author:Feng, H.(hfengoptics@gmail.com)

Source title:Laser Physics

Abbreviated source title:Laser Phys.

Volume:21

Issue:2

Issue date:February 2011

Publication year:2011

Pages:404-409

Language:English

ISSN:1054660X

E-ISSN:15556611

Document type:Conference article (CA)

Publisher:Maik Nauka-Interperiodica Publishing, Profsoyuznaya Ul 90, Moscow, 117997, Russia

Abstract:We have experimentally achieved the 8.3-ps ultra-short pulse at 10 GHz repetition rate with the time jitter as low as 590 fs in an actively mode-locked fiber ring laser. The ring-cavity laser is mode-locked by a semiconductor optical amplifier based on cross-gain modulation. The external CW source is modulated with radio frequency signal by an amplitude modulator as the external optical pulses and, then, injected into the fiber ring cavity to achieve active mode locking. Further investigating the laser output characteristics, it indicates that the linewidth of employed CW source affects properties of the generated ultra-short pulse, such as phase noise and time jitter. Ultra-short pulse at high repetition rate with low time jitter can be generated by the optimization of CW laser source. &copy; Pleiades Publishing, Ltd., 2011.

Number of references:32

Main heading:Mode-locked fiber lasers

Controlled terms:Fiber lasers - Light amplifiers - Pulse repetition rate - Ring lasers - Semiconductor lasers - Timing jitter - Ultrashort pulses

Uncontrolled terms:Active mode locking - Amplitude modulators - Cross gain modulation - CW-laser - Fiber ring cavity - Fiber-ring lasers - High repetition rate - Laser output - Low time jitter - Mode-locked  - Optical pulse - Radiofrequency signals - Repetition rate - Ring cavities - Short pulse - Time jitters

Classification code:716 Telecommunication; Radar, Radio and Television - 717 Optical Communication - 718 Telephone Systems and Related Technologies; Line Communications - 744 Lasers

DOI:10.1134/S1054660X11030017

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 3>

 

Accession number:20120514730019

Title:Multimodal learning for multi-label image classification

Authors:Pang, Yanwei (1); Ma, Zhao (1); Yuan, Yuan (2); Li, Xuelong (2); Wang, Kongqiao (3)

Author affiliation:(1) Department of Electrical Information Engineering, Tianjin University, Tianjin 300072, China; (2) Center for OPTical IMagery Analysis and Learning (OPTIMAL), Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, Shaanxi, China; (3) Nokia Research Center Beijing, Beijing 100176, China

Corresponding author:Pang, Y.

Source title:Proceedings - International Conference on Image Processing, ICIP

Abbreviated source title:Proc. Int. Conf. Image Process. ICIP

Monograph title:ICIP 2011: 2011 18th IEEE International Conference on Image Processing

Issue date:2011

Publication year:2011

Pages:1797-1800

Article number:6115811

Language:English

ISSN:15224880

ISBN-13:9781457713033

Document type:Conference article (CA)

Conference name:2011 18th IEEE International Conference on Image Processing, ICIP 2011

Conference date:September 11, 2011 - September 14, 2011

Conference location:Brussels, Belgium

Conference code:88213

Sponsor:IEEE; IEEE Signal Processing Society

Publisher:IEEE Computer Society, 445 Hoes Lane - P.O.Box 1331, Piscataway, NJ 08855-1331, United States

Abstract:We tackle the challenge of web image classification using additional tags information. Unlike traditional methods that only use the combination of several low-level features, we try to use semantic concepts to represent images and corresponding tags. At first, we extract the latent topic information by probabilistic latent semantic analysis (pLSA) algorithm, and then use multi-label multiple kernel learning to combine visual and textual features to make a better image classification. In our experiments on PASCAL VOC'07 set and MIR Flickr set, we demonstrate the benefit of using multimodal feature to improve image classification. Specifically, we discover that on the issue of image classification, utilizing latent semantic feature to represent images and associated tags can obtain better classification results than other ways that integrating several low-level features. &copy; 2011 IEEE.

Number of references:11

Main heading:Image analysis

Controlled terms:Image classification - Semantics

Uncontrolled terms:Classification results - Latent semantics - Low-level features - Multi-label - Multi-modal - Multimodal features - Multiple Kernel Learning - Probabilistic latent semantic analysis - Semantic concept

Classification code:716 Telecommunication; Radar, Radio and Television - 741 Light, Optics and Optical Devices - 903.2 Information Dissemination

DOI:10.1109/ICIP.2011.6115811

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 4>

 

Accession number:20120214676543

Title:Reflective point-diffraction microscopic interferometer with long-term stability

Authors:Guo, Rongli (1); Yao, Baoli (1); Gao, Peng (1); Min, Junwei (1); Zheng, Juanjuan (1); Ye, Tong (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 710119, China; (2) Graduate University of Chinese Academy of Sciences, Beijing 100049, China

Corresponding author:Yao, B.(yaobl@opt.ac.cn)

Source title:Chinese Optics Letters

Abbreviated source title:Chin. Opt. Lett.

Volume:9

Issue:12

Issue date:December 2011

Publication year:2011

Article number:120002

Language:English

ISSN:16717694

Document type:Journal article (JA)

Publisher:Science Press, 18,Shuangqing Street,Haidian, Beijing, 100085, China

Abstract:An on-axis phase-shifting reflective point-diffraction microscopic interferometer for quantitative phase microscopy based on Michelson architecture is proposed. A cube beamsplitter splits the object wave spectrum into two copies within two arms. Reference wave is rebuilt in one arm by low-pass filtering on the object wave frequency spectrum with a pinhole-mask mirror, and interferes with the object wave from the other arm. Polarization phase-shifting is performed and phase imaging on microscale specimens is implemented. The experimental results demonstrate that the proposed scheme has the advantage of long-term stability due to its quasi common-path geometry with full use of laser energy. &copy; 2011 Chinese Optics Letters.

Number of references:24

Main heading:Interferometers

Controlled terms:Diffraction - Spectroscopy

Uncontrolled terms:Common-path - Laser energies - Long term stability - Low-pass filtering - Michelson - Micro-scales - Object waves - Phase imaging - Phase-shifting - Quantitative phase microscopies  - Reference waves

Classification code:711.1 Electromagnetic Waves in Different Media - 801 Chemistry - 941.3 Optical Instruments

DOI:10.3788/COL201109.120002

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 5>

 

Accession number:20112013989959

Title:An adaptive VQ algorithm used in interferential multi-spectral image

Authors:Wen, Jia (1); Ma, Cai-Wen (1); Shui, Peng-Lang (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) Institute of Artificial Intelligence and Robotics, Xi'an Jiaotong University, Xi'an 710049, China

Corresponding author:Ma, C.-W.(njugongsunce@163.com)

Source title:Guang Pu Xue Yu Guang Pu Fen Xi/Spectroscopy and Spectral Analysis

Abbreviated source title:Guang Pu Xue Yu Guang Pu Fen Xi

Volume:31

Issue:4

Issue date:April 2011

Publication year:2011

Pages:1033-1037

Language:Chinese

ISSN:10000593

CODEN:GYGFED

Document type:Journal article (JA)

Publisher:Science Press, 18,Shuangqing Street,Haidian, Beijing, 100085, China

Abstract:In the present paper, an adaptive LBG VQ algorithm is proposed based on the point to line model for the expansion of LBG VQ algorithm which was proposed in 2009, and using the algorithm proposed in this paper can achieve less error quantification, and can avoid the increase in bits of the larger index generated by the point to line expansion of LBG VQ algorithm. This new algorithm was used in lossless compression of interferential multi-spectral LASIS image, and experiment shows that the adaptive LBG VQ algorithm can remarkably improve the lossless compression performance of interferential multi-spectral image, and that if using these VQ algorithms above after Dual-Direction Prediction, the compression ratio generated by the point to line expansion of LBG VQ algorithm will be a little less than that generated by conventional LBG VQ algorithm, and the compression ratio generated by the algorithm proposed in this paper will be much larger than that generated by conventional LBG VQ algorithm.

Number of references:8

Main heading:Adaptive algorithms

Controlled terms:Compression ratio (machinery) - Expansion - Image coding - Image compression

Uncontrolled terms:Adaptive VQ - Compression ratios - Error quantification - Interferential multi-spectral image - LASIS - LBG vector quantification - Lossless compression - Multi-spectral - Multispectral images - Point-to-line  - VQ algorithm

Classification code:618.1 Compressors - 723 Computer Software, Data Handling and Applications - 741 Light, Optics and Optical Devices - 921 Mathematics - 951 Materials Science

DOI:10.3964/j.issn.1000-0593(2011)04-1033-05

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 6>

 

Accession number:20122715188557

Title:Utilizing homotopy for single image superresolution

Authors:Lu, Xiaoqiang (1); Yan, Pingkun (1); Yuan, Yuan (1); Li, Xuelong (1); Yuan, Haoliang (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 710119, Shaanxi, China; (2) Faculty of Mathematics and Computer Science, Hubei University, Wuhan 430062, Hubei, China

Corresponding author:Lu, X.

Source title:1st Asian Conference on Pattern Recognition, ACPR 2011

Abbreviated source title:Asian Conf. Pattern Recogn., ACPR

Monograph title:1st Asian Conference on Pattern Recognition, ACPR 2011

Issue date:2011

Publication year:2011

Pages:316-320

Article number:6166654

Language:English

ISBN-13:9781457701221

Document type:Conference article (CA)

Conference name:1st Asian Conference on Pattern Recognition, ACPR 2011

Conference date:November 28, 2011 - November 28, 2011

Conference location:Beijing, China

Conference code:90727

Publisher:IEEE Computer Society, 445 Hoes Lane - P.O.Box 1331, Piscataway, NJ 08855-1331, United States

Abstract:Learning an appropriate dictionary is a critical issue for sparse representation based super-resolution algorithms. A good dictionary can well represent an underlying image. In super-resolution algorithms, classical dictionary learning doesn't consider the information of test image which contains the information of the reconstructed image. In this paper, the new dictionary is design for image super-resolution, incorporating both training image patches and test image patches for training. It is important for dictionary learning to adaptively choose the training image patches and test image patches which effectively represent the reconstructed image structures. In the new learning strategy, a homotopy method is applied to choose the parameter that yields a proper balance between the use of training image patches and test image patches. The homotopy method is used to track the homotopy path leading to the solution to the desired problem at the terminal point. Compared with other state-of-the-art learning methods, our algorithm learns an over-complete dictionary by exploiting the information of the given test image and training images. The experimental results show that the proposed method is able to achieve better experimental results in terms of both PSNR and visual perception. &copy; 2011 IEEE.

Number of references:13

Main heading:Image reconstruction

Controlled terms:Optical resolving power - Pattern recognition

Uncontrolled terms:Critical issues - Dictionary learning - Homotopies - Homotopy method - Homotopy path - Image super-resolution - IS design - Learning methods - Learning strategy - Over-complete  - Reconstructed image - Single images - Sparse representation - Super resolution - Super resolution algorithms - Terminal points - Test images - Training image - Visual perception

Classification code:741 Light, Optics and Optical Devices - 741.1 Light/Optics

DOI:10.1109/ACPR.2011.6166654

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 7>

 

Accession number:20113214224073

Title:Lossless data embedding using generalized statistical quantity histogram

Authors:Gao, Xinbo (1); An, Lingling (1); Yuan, Yuan (2); Tao, Dacheng (3); Li, Xuelong (2)

Author affiliation:(1) School of Electronic Engineering, Xidian University, Xi'an, Shaanxi 710071, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, Shaanxi, China; (3) Center for Quantum Computation and Intelligent Systems, Faculty of Engineering and Information Technology, University of Technology, Sydney, Broadway NSW 2007, Australia

Corresponding author:Gao, X.(xbgao@mail.xidian.edu.cn)

Source title:IEEE Transactions on Circuits and Systems for Video Technology

Abbreviated source title:IEEE Trans Circuits Syst Video Technol

Volume:21

Issue:8

Issue date:August 2011

Publication year:2011

Pages:1061-1070

Article number:5735196

Language:English

ISSN:10518215

CODEN:ITCTEM

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc., 445 Hoes Lane / P.O. Box 1331, Piscataway, NJ 08855-1331, United States

Abstract:Histogram-based lossless data embedding (LDE) has been recognized as an effective and efficient way for copyright protection of multimedia. Recently, a LDE method using the statistical quantity histogram has achieved good performance, which utilizes the similarity of the arithmetic average of difference histogram (AADH) to reduce the diversity of images and ensure the stable performance of LDE. However, this method is strongly dependent on some assumptions, which limits its applications in practice. In addition, the capacities of the images with the flat AADH, e.g., texture images, are a little bit low. For this purpose, we develop a novel framework for LDE by incorporating the merits from the generalized statistical quantity histogram (GSQH) and the histogram-based embedding. Algorithmically, we design the GSQH driven LDE framework carefully so that it: 1) utilizes the similarity and sparsity of GSQH to construct an efficient embedding carrier, leading to a general and stable framework; 2) is widely adaptable for different kinds of images, due to the usage of the divide-and-conquer strategy; 3) is scalable for different capacity requirements and avoids the capacity problems caused by the flat histogram distribution; 4) is conditionally robust against JPEG compression under a suitable scale factor; and 5) is secure for copyright protection because of the safe storage and transmission of side information. Thorough experiments over three kinds of images demonstrate the effectiveness of the proposed framework. &copy; 2011 IEEE.

Number of references:31

Main heading:Graphic methods

Controlled terms:Copyrights

Uncontrolled terms:Capacity problems - Capacity requirement - Copyright protections - Difference histograms - Divide and conquer - Flat histograms - Image Watermarking - JPEG compression - Lossless data embedding - reversibility  - Safe storage - Scale Factor - Side information - Statistical quantity - Texture image

Classification code:902.1 Engineering Graphics - 903 Information Science

DOI:10.1109/TCSVT.2011.2130410

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 8>

 

Accession number:20120314700444

Title:Generation of 10-GHz duty-cycle tunable square optical pulse in an SOA-based mode-locked fiber laser

Authors:Luo, D. (1); Yan, S.Y. (1); Xie, X.P. (1); Zhao, W. (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 710119, China; (2) Graduate University of Chinese Academy of Sciences, Beijing 100049, China

Corresponding author:Luo, D.(xiao1234xiao1234@163.com)

Source title:Laser Physics

Abbreviated source title:Laser Phys.

Volume:21

Issue:11

Issue date:November 2011

Publication year:2011

Pages:1909-1913

Language:English

ISSN:1054660X

E-ISSN:15556611

Document type:Journal article (JA)

Publisher:Maik Nauka-Interperiodica Publishing, Profsoyuznaya Ul 90, Moscow, 117997, Russia

Abstract:We demonstrate the generation of 10-GHz optical square pulses by injecting a picosecond pulse train into an SOA-based mode-locked fiber laser. The novel scheme exploits nonlinear effects and gain saturation phenomenon in the semiconductor optical amplifier (SOA). This technique uses gain-compression dynamics between the input pulses and the generated ones in gain-saturated SOA to form square pulses. The center wavelength of the generated optical square pulse can be tuned from 1530 to 1570 nm by adjusting the center wavelength of the optical band pass filter (OBPF) in the SOA-based mode-locked fiber ring laser. The duty cycle of the output pulse can be tuned from 12.7 to 88.4%, which strongly depends on the input power and intra-cavity power. &copy; Pleiades Publishing, Ltd., 2011.

Number of references:44

Main heading:Mode-locked fiber lasers

Controlled terms:Bandpass filters - Fiber lasers - Light amplifiers - Light pulse generators - Ring lasers - Semiconductor lasers

Uncontrolled terms:Center wavelength - Duty cycles - Fiber-ring lasers - Gain saturation - Input power - Input pulse - Intracavities - Mode-locked - Nonlinear effect - Optical bandpass filters  - Optical pulse - Output pulse - Pico-second pulse - Square pulse

Classification code:703.2 Electric Filters - 741.1 Light/Optics - 744 Lasers

DOI:10.1134/S1054660X11190224

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 9>

 

Accession number:20114914584037

Title:Optical system design of space fisheye camera

Authors:Yan, Aqi (1); Yang, Jianfeng (1); Cao, Jianzhong (1); Zhu, Qing (1); Zhang, Zhi (1); Wu, Dengshan (1); Wang, Hao (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, Shaanxi 710119, China; (2) Graduate University of Chinese Academy of Sciences, Beijing 100049, China

Corresponding author:Yan, A.(yanaqi@opt.ac.cn)

Source title:Guangxue Xuebao/Acta Optica Sinica

Abbreviated source title:Guangxue Xuebao

Volume:31

Issue:10

Issue date:October 2011

Publication year:2011

Pages:1022004-1-1022004-4

Language:Chinese

ISSN:02532239

CODEN:GUXUDC

Document type:Journal article (JA)

Publisher:Chinese Optical Society, P.O. Box 80, Xi'an, 710068, China

Abstract:Optical system of a space fisheye camera based on 1/3 inch (1 inch=25.4 mm) CCD is designed considering the space environment. The focal length of the fisheye optical system is 2.1 mm, the F number is 4, and the field of view is 210&deg;. The required working temperature is between -40&deg;C~+60&deg;C. After careful studying the influence of space environment such as the space &gamma; radiation and ultraviolet radiation, temperature change and vacuum on the optical system, the technique for keeping image quality in space environment is put forward. The fisheye lens can reach excellent imaging quality in such an austere environment, and provide important guarantee for information capture with extreme wide-angle view on the orbit.

Number of references:10

Main heading:Optical systems

Controlled terms:Cameras - Image quality - Optical design - Systems analysis - Ultraviolet radiation

Uncontrolled terms:Anti-radiation - F number - Field of views - Fish-eye - Fish-eye cameras - Fish-eye lens - Focal lengths - Imaging quality - Space cameras - Space environment  - Temperature changes - Wide-angle lens - Working temperatures

Classification code:741 Light, Optics and Optical Devices - 742.2 Photographic Equipment - 961 Systems Science

DOI:10.3788/AOS201131.1022004

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 10>

 

Accession number:20121914992993

Title:Optical trapping with cylindrical vector beams

Authors:Yao, Baoli (1); Yan, Shaohui (1); Lei, Ming (1); Peng, Fei (1); Ma, Baiheng (1); Ye, Tong (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 710119, China

Corresponding author:Yao, B.(yaobl@opt.ac.cn)

Source title:2011 Functional Optical Imaging, FOI 2011

Abbreviated source title:Funct. Opt. Imaging, FOI

Monograph title:2011 Functional Optical Imaging, FOI 2011

Issue date:2011

Publication year:2011

Article number:6154814

Language:English

ISBN-13:9781467304511

Document type:Conference article (CA)

Conference name:2011 Functional Optical Imaging, FOI 2011

Conference date:December 3, 2011 - December 4, 2011

Conference location:Ningbo, China

Conference code:89481

Publisher:IEEE Computer Society, 445 Hoes Lane - P.O.Box 1331, Piscataway, NJ 08855-1331, United States

Abstract:Recent development of cylindrical vector beams prompts its application in optical trapping, which shows more effective and improved trapping efficiency in contrast to the traditional Gaussian beam of spatially homogeneous polarization. Using the T-matrix method and vectorial diffraction theory, we calculated and compared the radiation forces exerted on dielectric particles respectively by the linearly polarized, radially polarized and azimuthally polarized beams. Theoretical calculations show that the radially polarized beam can improve the axial trapping efficiency of high-refractive-index larger particles by reducing the scattering force due to the vanishing axial component of Poynting vector near the focus, while the azimuthally polarized beam can not only steadily trap low-refractive-index small particles at the focus center but also can trap multiple high-refractive-index particles around the focus center in virtue of the hollow-ring configuration. The dependences of the trapping efficiencies on the beam parameters, particle size and the numerical aperture of objective lens are discussed. The performances of optical trapping, manipulating and sorting of biological cells, organelles and various micro-particles are demonstrated. &copy; 2011 IEEE.

Main heading:Efficiency

Controlled terms:Electromagnetic waves - Gaussian beams - Optical image storage - Refractive index

Uncontrolled terms:Axial components - Beam parameter - Biological cells - Cylindrical vector beam - Dielectric particles - Linearly polarized - Micro-particles - Numerical aperture - Objective lens - Opticaltrapping  - Polarized beams - Poynting vectors - Radially polarized - Radially polarized beam - Radiation forces - Scattering forces - Small particles - T-matrix method - Theoretical calculations - Trapping efficiencies  - Vectorial diffraction

Classification code:711 Electromagnetic Waves - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 913.1 Production Engineering

DOI:10.1109/FOI.2011.6154814

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 11>

 

Accession number:IP51392434

Title:Vehicle detection and tracking in airborne videos by multi-motion layer analysis

Authors:Cao, Xianbin (1); Lan, Jinhe (1); Yan, Pingkun (3); Li, Xuelong (3)

Author affiliation:(1) University of Science and Technology of China, Hefei, 230026, China; (2) BeiHang University, Beijing, 100083, China; (3) Center for OPTical IMagery Analysis and Learning (OPTIMAL), State Key Laboratory of Transient Optics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, 710119, China

Corresponding author:Yan, P.(pingkun@ieee.org)

Source title:Machine Vision and Applications

Abbreviated source title:Mach Vision Appl

Issue date:2011

Publication year:2011

Pages:1-15

Language:English

ISSN:09328092

E-ISSN:14321769

CODEN:MVAPEO

Document type:Article in Press

Abstract:Airborne vehicle detection and tracking systems equipped on unmanned aerial vehicles (UAVs) are receiving more and more attention due to their advantages of high mobility, fast deployment and large surveillance scope. However, such systems are difficult to develop because of factors like UAV motion, scene complexity, and especially the partial occlusion of targets. To address these problems, a new framework of multi-motion layer analysis is proposed to detect and track moving vehicles in airborne platform. After motion layers are constructed, they are maintained over time for tracking vehicles. Most importantly, since the vehicle motion layers can be maintained even when the vehicles are only partially observed, the proposed method is robust to partial occlusion. Our experimental results showed that (1) compared with other previous algorithms, our method can achieve better performance in terms of higher detection rate and lower false positive rate; (2) it is more efficient and more robust to partial occlusion; (3) it is able to meet the demand of real time application due to its computational simplicity. &copy; 2011 Springer-Verlag.

Number of references:40

Main heading:Tracking (position)

Controlled terms:Computational efficiency - Unmanned aerial vehicles (UAV) - Vehicles

Uncontrolled terms:Airborne platforms - Airborne vehicles - Airborne video - Detection rates - False positive rates - High mobility - Motion layers - Moving vehicles - Partial occlusions - Real-time application  - Scene complexity - Vehicle detection - Vehicle motion

Classification code:432 Highway Transportation - 652.1 Aircraft, General - 716.2 Radar Systems and Equipment - 921 Mathematics

DOI:10.1007/s00138-011-0336-x

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 12>

 

Accession number:20112214018839

Title:Travelogue enriching and scenic spot overview based on textual and visual topic models

Authors:Pang, Yanwei (1); Lu, Xin (1); Yuan, Yuan (2); Li, Xuelong (2)

Author affiliation:(1) School of Electronic Information Engineering, Tianjin University, Tianjin 300072, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, Shaanxi, China

Corresponding author:Pang, Y.(pyw@tju.edu.cn)

Source title:International Journal of Pattern Recognition and Artificial Intelligence

Abbreviated source title:Int J Pattern Recognit Artif Intell

Volume:25

Issue:3

Issue date:May 2011

Publication year:2011

Pages:373-390

Language:English

ISSN:02180014

CODEN:IJPIEI

Document type:Journal article (JA)

Publisher:World Scientific Publishing Co. Pte. Ltd, 5 Toh Tuck Link, Singapore, 596224, Singapore

Abstract:We consider the problem of enriching the travelogue associated with a small number (even one) of images with more web images. Images associated with the travelogue always consist of the content and the style of textual information. Relying on this assumption, in this paper, we present a framework of travelogue enriching, exploiting both textual and visual information generated by different users. The framework aims to select the most relevant images from automatically collected candidate image set to enrich the given travelogue, and form a comprehensive overview of the scenic spot. To do these, we propose to build two-layer probabilistic models, i.e. a text-layer model and image-layer models, on offline collected travelogues and images. Each topic (e.g. Sea, Mountain, Historical Sites) in the text-layer model is followed by an image-layer model with sub-topics learnt (e.g. the topic of sea is with the sub-topic like beach, tree, sunrise and sunset). Based on the model, we develop strategies to enrich travelogues in the following steps: (1) remove noisy names of scenic spots from travelogues; (2) generate queries to automatically gather candidate image set; (3) select images to enrich the travelogue; and (4) choose images to portray the visual content of a scenic spot. Experimental results on Chinese travelogues demonstrate the potential of the proposed approach on tasks of travelogue enrichment and the corresponding scenic spot illustration. &copy; 2011 World Scientific Publishing Company.

Number of references:32

Main heading:Models

Controlled terms:Concentration (process) - Data mining - Landforms - User interfaces

Uncontrolled terms:Image sets - Offline - Probabilistic models - Scenic spot - text mining - Textual information - Topic model - travelogue - Two layers - User-generated content  - Visual content - Visual information - Web images

Classification code:481.1 Geology - 722.2 Computer Peripheral Equipment - 723.3 Database Systems - 802.3 Chemical Operations - 902.1 Engineering Graphics

DOI:10.1142/S0218001411008671

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 13>

 

Accession number:20111913967412

Title:Enhancement of nonreciprocal phase shift by magneto-optical slot waveguide with a compensation wall

Authors:Zhang, Wenfu (1); Mu, Jian-Wei (3); Huang, Wei-Ping (3); Zhao, Wei (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 710119, China; (2) Graduate School of the Chinese Academy of Sciences, Beijing 100049, China; (3) Department of Electrical and Computer Engineering, McMaster University, Hamilton, ON L8S 4K1, Canada

Corresponding author:Zhang, W.(wfu.zhang@gmail.com)

Source title:Applied Physics Letters

Abbreviated source title:Appl Phys Lett

Volume:98

Issue:17

Issue date:April 25, 2011

Publication year:2011

Article number:171109

Language:English

ISSN:00036951

CODEN:APPLAB

Document type:Journal article (JA)

Publisher:American Institute of Physics, 2 Huntington Quadrangle, Suite N101, Melville, NY 11747-4502, United States

Abstract:We demonstrated that the nonreciprocal phase shift (NPS) can be efficiently enhanced by introducing a low-index magneto-optical (MO) slot with a compensation wall (CW) in a high-index non-MO waveguide. The proposed structure has been examined by a perturbation theory and it is found that by adjusting the slot width and waveguide height, more than 20 times enhancement of NPS comparing with the rib waveguide with a CW can be realized. &copy; 2011 American Institute of Physics.

Number of references:24

Main heading:Waveguides

Controlled terms:Magnetos - Perturbation techniques - Phase shift

Uncontrolled terms:High-index - Magneto-optical - Nonreciprocal phase shift - Perturbation theory - Rib waveguides - Slot width

Classification code:708.4 Magnetic Materials - 714.3 Waveguides - 921 Mathematics - 942.2 Electric Variables Measurements

DOI:10.1063/1.3584035

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

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Accession number:20112013990640

Title:Eliminating influence of grating encoder's eccentricity and vibration to moir&#233; fringes signal by four reading heads

Authors:Zhu, Fan (1); Wu, Yiming (1); Liu, Changchun (2)

Author affiliation:(1) Laboratory of Optical Orientation and Collimation, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, Shaanxi 710119, China; (2) The 61541st Troop of the People's Liberation Army, Beijing 100094, China

Corresponding author:Zhu, F.(zhufan2080@163.com)

Source title:Guangxue Xuebao/Acta Optica Sinica

Abbreviated source title:Guangxue Xuebao

Volume:31

Issue:4

Issue date:April 2011

Publication year:2011

Article number:0412008

Language:Chinese

ISSN:02532239

CODEN:GUXUDC

Document type:Journal article (JA)

Publisher:Chinese Optical Society, P.O. Box 80, Xi'an, 710068, China

Abstract:Presently, grating encoder is an important way to accurately measure angle, however, the eccentric inaccuracy of assembling adjusting and the vibration of rotating shaft influence grating encoder's measuring accuracy and then confine the application range of grating encoder. A new method to eliminate the influence of eccentricity and vibration with four reading heads is proposed and the theoretical derivation and simulation results are given out. The conclusion hints that the method which gets moire&acute; fringes signal by four reading heads well-distributed along the circumference of grating is more effective in improving the measuring accuracy than the one that uses double reading heads. Consequently, the new method decreases the requirements of assembling adjusting. The direction and magnitude also can be solved by four reading heads, so the influence of rotating shaft can be eliminated. All the results are useful to deeper research.

Number of references:11

Main heading:Rotation

Controlled terms:Rotating machinery

Uncontrolled terms:Application range - Double reading - Eccentric inaccuracy - Grating encoder - Measuring accuracy - Phase - Rotating shaft - Simulation result - Vibration of rotating shaft

Classification code:601.1 Mechanical Devices

DOI:10.3788/AOS201131.0412008

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

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Accession number:20120314692799

Title:Optimization of the high repetition rate all-fiber two-stage ytterbium-doped fiber amplifier

Authors:Yun, Jian (1); Gao, Cunxiao (1); Zhu, Shaolan (1); Sun, Chuandong (1); Dong, Lijun (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 710119, China; (2) Graduate School of the Chinese Academy of Sciences, Beijing 100039, China

Corresponding author:Gao, C.

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8198

Monograph title:2011 International Conference on Optical Instruments and Technology: Optoelectronic Devices and Integration

Issue date:2011

Publication year:2011

Article number:81980X

Language:English

ISSN:0277786X

CODEN:PSISDG

ISBN-13:9780819488398

Document type:Journal article (JA)

Conference name:2011 International Conference on Optical Instruments and Technology: Optoelectronic Devices and Integration

Conference date:November 6, 2011 - November 9, 2011

Conference location:Beijing, China

Conference code:88092

Sponsor:The Society of Photo-Optical Instrumentation Engineers (SPIE); China Instrument and Control Society (CIS); Chinese Optical Society (COS)

Publisher:SPIE, P.O. Box 10, Bellingham, WA 98227-0010, United States

Abstract:Based on the technique of master oscillator power amplifier (MOPA), a two-stage ytterbium-doped fiber amplifier (YDFA) with all-fiber structure is theoretically simulated. The seed signal operating at the wavelength of 1064 nm has the characteristic of high repetition rate (10 MHz), ultrashort pulse duration (10 ps), low signal power input (20&mu;W) and single longitudinal mode. The gain (and amplification stimulation emission power) is calculated at the different pump powers and gain fiber lengths of YDFA pumped by 975 nm. In addition, the amplifications at the different signal power inputs (1-25&mu;W) are also simulated. The numerical results can be used to optimize the YDFA. &copy; 2011 SPIE.

Number of references:12

Main heading:Fibers

Controlled terms:Amplification - Fiber amplifiers - Optical instruments - Optical phase conjugation - Optimization - Optoelectronic devices - Power amplifiers - Pulse repetition rate - Ytterbium

Uncontrolled terms:1064 nm - All fiber - ASE noise - Emission power - Gain fibers - High repetition rate - Master oscillator power amplifiers - Numerical results - Pump power - Signal power  - simulation - Single longitudinal mode - Two stage - Ytterbium doped fibers - Ytterbium-doped fiber amplifier

Classification code:817 Plastics and Other Polymers: Products and Applications - 812 Ceramics, Refractories and Glass - 744.4 Solid State Lasers - 921.5 Optimization Techniques - 744.1 Lasers, General - 713.1 Amplifiers - 547.2 Rare Earth Metals - 741 Light, Optics and Optical Devices

DOI:10.1117/12.917087

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

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Accession number:20111713936103

Title:SG diagnostic equipment: Gating pinhole framing camera

Authors:Bai, Xiao-Hong (1); Bai, Yong-Lin (1); Liu, Bai-Yu (1); Qin, Jun-Jun (1); Zhao, Jun-Ping (1); Wang, Bo (1); Yang, Wen-Zheng (1); Gou, Yong-Sheng (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Xi'an 710119, China; (2) Graduate University of Chinese Acad. of Sci., Beijing 100039, China

Corresponding author:Bai, X.-H.(bxh@opt.ac.cn)

Source title:Guangxue Jingmi Gongcheng/Optics and Precision Engineering

Abbreviated source title:Guangxue Jingmi Gongcheng

Volume:19

Issue:2

Issue date:February 2011

Publication year:2011

Pages:367-373

Language:Chinese

ISSN:1004924X

CODEN:GJGOF4

Document type:Journal article (JA)

Publisher:Chinese Academy of Sciences, 140 Renmin Street, Changchun, 130022, China

Abstract:In order to install an X-ray Pinhole Framing Camera (X-PFC) conveniently and run smoothly in the SG3 prototype system (SG3-PS) of Inertial Confinement Fusion (ICF), a novel type X-PFC was developed on the basis of original models and a conical barrel pinhole imaging system was desined to eliminate the stray light and to obtain the pinhole imaging in the SG3-PS. The matching parameters were evidently improved by designing a long micro-strip in new tube, which could keep the number of imagings to be still 16 frames in the limited space by using new type fluorescent screen, steady clamp method and the way of sealing up with two optics fiber plates. The save quality of new tube was improved greatly by gating pulse voltage on the screen. Furthermore, the high-voltage pulse generators and all of monitoring facilities were assembled in the cylinder barrel type vacuum seal configuration by PC104. Experiments show that all kinds of technical indexes have been upgraded when some parts of the new camera structure are redesigned and experimental results are received better.

Number of references:13

Main heading:Inertial confinement fusion

Controlled terms:Cameras - Cylinder configurations - Cylinders (shapes) - Electric potential - Fluorescence - Fluorescent screens - Image storage tubes - Pinhole cameras - Plates (structural components) - Pulse generators  - Signal generators

Uncontrolled terms:Diagnostic equipment - Fast diagnosis - Framing Camera - Gating pulse - High-voltage pulse generator - Limited space - Matching parameters - Micro channel plate - Microstripes - Optics fiber  - Original model - Pinhole imaging - Pinhole imaging systems - Prototype system - Screen - Vacuum seals

Classification code:741.3 Optical Devices and Systems - 741.1 Light/Optics - 715 Electronic Equipment, General Purpose and Industrial - 714.1 Electron Tubes - 742.2 Photographic Equipment - 713.4 Pulse Circuits - 621.2 Fusion Reactors - 612.1 Internal Combustion Engines, General - 408.2 Structural Members and Shapes - 701.1 Electricity: Basic Concepts and Phenomena

DOI:10.3788/OPE.20111902.0367

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

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Accession number:20112013982352

Title:Multiple responses of TPP-assisted near-perfect absorption in metal/Fibonacci quasiperiodic photonic crystal

Authors:Gong, Yongkang (1); Liu, Xueming (1); Wang, Leiran (1); Lu, Hua (1); Wang, Guoxi (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 710119, China

Corresponding author:Gong, Y.

Source title:Optics Express

Abbreviated source title:Opt. Express

Volume:19

Issue:10

Issue date:May 9, 2011

Publication year:2011

Pages:9759-9769

Language:English

E-ISSN:10944087

Document type:Journal article (JA)

Publisher:Optical Society of America, 2010 Massachusetts Ave, NW, Washington, DC, DC 20036-1023, United States

Abstract:Absorption properties in one-dimensional quasiperiodic photonic crystal composed of a thin metallic layer and dielectric Fibonacci multilayers are investigated. It is found that a large number of photonic stopbands can occur at the dielectric Fibonacci multilayers. Tamm plasmon polaritons (TPPs) with the frequencies locating at each photonic stopband are excited at the interface between the metallic layer and the dielectric layer, leading to almost perfect absorption for the energy of incident wave. By adjusting the length of dielectric layer with higher refractive-index or the Fibonacci order, the number of absorption peaks can be tuned effectively and enlarged significantly. &copy; 2011 Optical Society of America.

Number of references:33

Main heading:Absorption

Controlled terms:Multilayers - Photonic crystals

Uncontrolled terms:Absorption peaks - Absorption property - Dielectric layer - Fibonacci multilayers - Incident waves - Metallic layers - Multiple response - Plasmon-polaritons - Quasi-periodic photonic crystals - Stop-bands  - Stopband - Thin metallic layer

Classification code:931.2 Physical Properties of Gases, Liquids and Solids - 933.1 Crystalline Solids

DOI:10.1364/OE.19.009759

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

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Accession number:20114214439558

Title:Discrete complex amplitude filter for ultra long optical tube

Authors:Wang, Jiming (1); Liu, Qingliang (1); Liu, Youwen (1); Chen, Weibin (3); Zhan, Qiwen (3)

Author affiliation:(1) College of Science, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an 710119, China; (3) Electro-Optics Program, University of Dayton, 300 College Park, Dayton OH 45469, United States

Corresponding author:Wang, J.(jimingw@nuaa.edu.cn)

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8097

Monograph title:Optical Trapping and Optical Micromanipulation VIII

Issue date:2011

Publication year:2011

Article number:809722

Language:English

ISSN:0277786X

CODEN:PSISDG

ISBN-13:9780819487070

Document type:Conference article (CA)

Conference name:Optical Trapping and Optical Micromanipulation VIII

Conference date:August 21, 2011 - August 25, 2011

Conference location:San Diego, CA, United states

Conference code:86932

Sponsor:The Society of Photo-Optical Instrumentation Engineers (SPIE)

Publisher:SPIE, P.O. Box 10, Bellingham, WA 98227-0010, United States

Abstract:We proposed a discrete complex amplitude filter to create a focused hollow field with ultra long depth of focus. As for a high numerical aperture lens (NA=0.95), the focused field in the focal region can be engineered into a field like a long "tube" with flat wall through manipulating the distribution of the transmitted amplitude and phase at the pupil plane. This complex amplitude filter at the pupil plane can be discretized into multiple annular zones with different radius, transmittances and phase delays. A focused tube field with long depth of focus(&sim;9&lambda;) has been created as an example through separating and averaging of the projected pupil radiation pattern of magnetic dipole array in the focal region. Imperfections of the designed filter will influence the quality of the generated optical tube field and tolerance deviation of the radius, transmittance and phase delay in each zone is discussed. For the optical trapping, this created tube field can expand the manipulated distance and increase the trapped particles' numbers. &copy; 2011 SPIE.

Number of references:13

Main heading:Tubes (components)

Controlled terms:Amplitude modulation - Micromanipulators

Uncontrolled terms:Azimuthal polarization - Depth of focus - Discrete complexes - Optical tube - Opticaltrapping

Classification code:616.1 Heat Exchange Equipment and Components - 716 Telecommunication; Radar, Radio and Television - 731.5 Robotics

DOI:10.1117/12.893756

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

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Accession number:20113714332863

Title:Optical system design of a two-linear array stereoscopic mapping CCD camera

Authors:Chang, Lingying (1); Zhao, Baochang (1); Yang, Jianfeng (1); Wen, Desheng (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, Shaanxi 710119, China; (2) Graduate University of Chinese Academy of Sciences, Beijing 100049, China

Corresponding author:Wen, D.(ven@opt.ac.cn)

Source title:Zhongguo Jiguang/Chinese Journal of Lasers

Abbreviated source title:Zhongguo Jiguang

Volume:38

Issue:8

Issue date:August 2011

Publication year:2011

Article number:0816001

Language:Chinese

ISSN:02587025

CODEN:ZHJIDO

Document type:Journal article (JA)

Publisher:Science Press, 18,Shuangqing Street,Haidian, Beijing, 100085, China

Abstract:In order to obtain the image of 7 m resolution with the Chang'E-2 CCD stereoscopic camera on the 100-km-altitude circular orbit, a two-linear array CCD camera stereoscopic mapping optical system is designed. The principle of two-linear array stereo mapping camera is described. According to the satellite requirements, the main parameters of the optical system are calculated detailedly. The focal length of the system is 144.4 mm, the view angle is 42'E-2 satellite CCD stereoscopic camera are obtained. The images are clear and rich of detail information, demonstrating the effectiveness of the optical system.

Number of references:8

Main heading:CCD cameras

Controlled terms:Array processing - Mapping - Optical design - Optical systems - Systems analysis

Uncontrolled terms:Circular orbit - Focal lengths - Main parameters - Stereo mapping - Stereoscopic camera - Two-linear array

Classification code:961 Systems Science - 902.1 Engineering Graphics - 741.3 Optical Devices and Systems - 741.1 Light/Optics - 732 Control Devices - 716 Telecommunication; Radar, Radio and Television - 714.2 Semiconductor Devices and Integrated Circuits

DOI:10.3788/CJL201138.0816001

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

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Accession number:20120414719407

Title:Femtosecond laser machining characteristics in a single-crystal superalloy

Authors:Zhang, Wei (1); Cheng, Guanghua (2); Feng, Qiang (1); Cao, Lamei (4)

Author affiliation:(1) State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (3) National Center for Materials Service Safety, University of Science and Technology Beijing, Beijing 100083, China; (4) National Key Laboratory of Science, Technology on Advanced High Temperature Structural Materials, Beijing Institute of Aeronautical Materials, Beijing 100095, China

Corresponding author:Feng, Q.(qfeng@skl.ustb.edu.cn)

Source title:Rare Metals

Abbreviated source title:Rare Met

Volume:30

Issue:SUPPL.1

Issue date:March 2011

Publication year:2011

Pages:639-642

Language:English

ISSN:10010521

E-ISSN:18677185

CODEN:RARME8

Document type:Journal article (JA)

Publisher:University of Science and Technology Beijing, 30 Xueyuan Lu, Beijing, 100083, China

Abstract:Femtosecond laser machining characteristics of a nickel-base single-crystal superalloy were investigated as a function of laser fluence and the number of laser pulses. The significant decrease of recast layer for femtosecond laser machining was observed compared with that for nanosecond laser machining. The ablation thresholds for 1, 10, and 100 femtosecond pulse exposure were measured. Two ablation regions of the ablated crater were observed. The change of the ablation diameter and depth depended on the laser fluence and the number of laser pulses. And higher laser fluence could enable a faster rate of laser-machining. &copy; The Nonferrous Metals Society of China and Springer-Verlag Berlin Heidelberg 2011.

Number of references:18

Main heading:Ultrashort pulses

Controlled terms:Ablation - Electromagnetic pulse - Machining - Superalloys - Ultrafast lasers

Uncontrolled terms:Ablation thresholds - Faster rates - Femto-second laser - Femtosecond laser machining - Femtosecond pulse - Laser fluences - Nanosecond lasers - Recast layer - Single crystal superalloys - Single-crystal superalloy  - Threshold

Classification code:531 Metallurgy and Metallography - 604.2 Machining Operations - 641.2 Heat Transfer - 701 Electricity and Magnetism - 744.1 Lasers, General

DOI:10.1007/s12598-011-0362-z

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 21>

 

Accession number:20114514495716

Title:Nonparaxial propagation of vectorial hollow Gaussian beams diffracted at an annular aperture

Authors:Yang, Yuanjie (1); Li, Xiaofeng (1); Duan, Kailiang (2)

Author affiliation:(1) University of Electronic Science and Technology of China, Institute of Astronautics and Aeronautics, Chengdu 610054, China; (2) State Key Laboratory of Transient Optics and Photonics, Xian Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xian 710068, China

Corresponding author:Yang, Y.(dr.yang2003@yahoo.com.cn)

Source title:Optical Engineering

Abbreviated source title:Opt Eng

Volume:50

Issue:7

Issue date:July 2011

Publication year:2011

Article number:078001

Language:English

ISSN:00913286

E-ISSN:15602303

CODEN:OPEGAR

Document type:Journal article (JA)

Publisher:SPIE, P.O. Box 10, Bellingham, WA 98227-0010, United States

Abstract:Based on the vectorial Raleigh-Sommerfeld diffraction integral, an analytical propagation equation of vectorial nonparaxial hollow Gaussian beams (HGBs) through an annular aperture is derived. The corresponding closed-forms for a circular aperture, a circular black screen, and unapertured case are given as special cases of the general results. The typical numerical examples are given to illustrate our analytical results. It is shown that the f parameter plays an important role in determining the nonparaxiality of vectorial apertured HGBs. &copy; 2011 Society of Photo-Optical Instrumentation Engineers (SPIE).

Number of references:16

Main heading:Gaussian beams

Controlled terms:Diffraction - Gaussian distribution - Gaussian noise (electronic)

Uncontrolled terms:Analytical propagation equation - Analytical results - Annular apertures - Circular aperture - Diffraction integral - F parameter - Hollow Gaussian beam - Nonparaxial - Nonparaxial propagation - Numerical example

Classification code:711 Electromagnetic Waves - 711.1 Electromagnetic Waves in Different Media - 713 Electronic Circuits - 716 Telecommunication; Radar, Radio and Television - 922.1 Probability Theory

DOI:10.1117/1.3595864

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

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Accession number:20112614103564

Title:High energy dual-wavelength mid-infrared extracavity KTA optical parametric oscillator

Authors:Liu, Hongjun (1); Sun, Qibing (1); Huang, Nan (1); Zhu, Shaolan (1); Zhao, Wei (1)

Author affiliation:(1) Laboratory of Transient Optics and Photonics Technology, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Liu, H.(liuhongjun@opt.ac.cn)

Source title:World Academy of Science, Engineering and Technology

Abbreviated source title:World Acad. Sci. Eng. Technol.

Volume:77

Issue date:May 2011

Publication year:2011

Pages:422-425

Language:English

ISSN:2010376X

E-ISSN:20103778

Document type:Journal article (JA)

Publisher:WASET - World Academy of Science, Engineering and Technology, Adem Yavuz Cd 6/A7, Bayrampasa, Istanbul, 34045, Turkey

Abstract:A high energy dual-wavelength extracavity KTA optical parametric oscillator (OPO) with excellent stability and beam quality, which is pumped by a Q-switched single-longitudinal-mode Nd:YAG laser, has been demonstrated based on a type II noncritical phase matching (NCPM) KTA crystal. The maximum pulse energy of 10.2 mJ with the output stability of better than 4.1% rms at 3.467 &mu;m is obtained at the repetition rate of 10 Hz and pulse width of 2 ns, and the 11.9 mJ of 1.535 &mu;m radiation is obtained simultaneously. This extracavity NCPM KTA OPO is very useful when high energy, high beam quality and smooth time domain are needed.

Number of references:10

Main heading:Optical parametric oscillators

Controlled terms:High energy physics - Infrared devices - Infrared lasers - Neodymium lasers - Pulse repetition rate - Pumping (laser)

Uncontrolled terms:Dual wavelength laser - Dual-wavelength - High beam quality - High energy - Midinfrared - Midinfrared lasers - ND : YAG lasers - Noncritical phase matching - OPO - Output stability  - Pulse energies - Pulse width - Q-switched - Repetition rate - Single longitudinal mode - Time domain - Type II

Classification code:741.3 Optical Devices and Systems - 744.1 Lasers, General - 744.4 Solid State Lasers - 932.1 High Energy Physics

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

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Accession number:20113814351369

Title:Predictive filter-based relative attitude and position determination for rendezvous and docking between spacecrafts

Authors:Yang, Shao-Dong (1); Wen, De-Sheng (1); Ma, Jun-Yong (1); Sun, Jing (1)

Author affiliation:(1) The Space Optical Technology Research Department, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710069, China; (2) Graduate University of Chinese Academy of Sciences, Beijing 100049, China

Corresponding author:Yang, S.-D.(sandon0326@opt.ac.cn)

Source title:Yuhang Xuebao/Journal of Astronautics

Abbreviated source title:Yuhang Xuebao

Volume:32

Issue:8

Issue date:August 2011

Publication year:2011

Pages:1688-1693

Language:Chinese

ISSN:10001328

CODEN:YUXUD6

Document type:Journal article (JA)

Publisher:China Spaceflight Society, 2 Yuetan Beixiaojie, Beijing, 100830, China

Abstract:A predictive filtering algorithm for real-time attitude and position determination with high accuracy and strong robustness is proposed in this paper. Based the line-of-sight measurement of Vision-based Navigation, a system errors model is established to predict the angular rate and linear rate one step and then the relative attitude and position between spacecrafts are accurately estimated. What is more, the predicted attitude and position are modified and updated by using Kalman gain and performance of algorithm is improved. Results of simulation based rendezvous and docking show that predictive filtering can accurately estimate the relative attitude and position, and the modified algorithm give a better result. The accuracy meets the requirement for rendezvous and docking. It has an important reference value for in-orbit experiment.

Number of references:8

Main heading:Spacecraft

Controlled terms:Algorithms - Docking - Manned space flight - Measurement errors - Unmanned vehicles

Uncontrolled terms:Angular rate - Attitude - Filter-based - In-orbit - Kalman gain - Line-of-sight - Linear rate - Model error - Modified algorithms - One step  - Performance of algorithm - Position - Position determination - Predictive filter - Predictive filtering - Real-time attitude - Reference values - Relative attitude - Rendezvous and docking - Simulation-based  - System errors - Vision based navigation

Classification code:922 Statistical Methods - 921 Mathematics - 723 Computer Software, Data Handling and Applications - 656.1 Space Flight - 655.1 Spacecraft, General - 652 Aircraft and Avionics - 472 Ocean Engineering

DOI:10.3873/j.issn.1000-1328.2011.08.006

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

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Accession number:20111813948956

Title:Fabrication of high thermal conductive Al-cBN ceramic sinters by high temperature high pressure method

Authors:Wang, P.F. (1); Li, Zh.H. (2); Zhu, Y.M. (2)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Procession Mechanics, Chinese Academy of Sciences (CAS), Xi'an, Shanxi 710119, China; (2) Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education, School of Material Science and Engineering, Tianjin University, 92, Weijin road, Nankai district, Tianjin 300072, China

Corresponding author:Li, Zh. H.(tjumarkli@yahoo.cn)

Source title:Solid State Sciences

Abbreviated source title:Solid State Sci.

Volume:13

Issue:5

Issue date:May 2011

Publication year:2011

Pages:1041-1046

Language:English

ISSN:12932558

CODEN:SSSCFJ

Document type:Journal article (JA)

Publisher:Elsevier Masson SAS, 62 rue Camille Desmoulins, Issy les Moulineaux Cedex, 92442, France

Abstract:Al-cBN ceramic sinters were fabricated by sintering micro-powder mixture of Al and cBN under high temperature and high pressure condition. Differential scanning calorimetry (DSC), X-ray diffraction (XRD), scanning electronic microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) elemental mapping analyses and laser flashing thermal conductivity measurements were performed to investigate the sintering properties and thermal conductivity of the Al-cBN ceramic sinters. XRD analysis revealed these Al-cBN ceramic sinters were composed of a large portion of cBN and of a small portion of AlN, and very little amount of AlB<inf>12</inf> and hBN. Formation of boundary phase resulted in the rapid densification of the sinters, as well as the increase of their relative density with increasing Al additions. The Al-cBN ceramic sinters have a maximum thermal conductivity of about 1.94 W/cm K at room temperature and a much higher value of about 2.04 W/cm K at 200 &deg;C. Their high thermal conductivity over that of AlN-hBN composites promise Al-cBN ceramic sinters favorite candidates as high efficiency heat sink materials for wide band gap semiconductors. &copy; 2011 Elsevier Masson SAS. All rights reserved.

Number of references:36

Main heading:Thermal conductivity

Controlled terms:Aluminum - Boron - Ceramic materials - Cubic boron nitride - Differential scanning calorimetry - Energy dispersive spectroscopy - Heat sinks - High pressure engineering - Sintering - X ray diffraction  - X ray diffraction analysis - X ray spectroscopy

Uncontrolled terms:AlN - Boundary phase - Elemental mapping analysis - Energy dispersive x-ray spectroscopy - Heat sink materials - High efficiency - High temperature and high pressure - High temperature high pressure - High temperature high pressure sintering - High thermal  - High thermal conductivity - Powder mixtures - Rapid densification - Relative density - Room temperature - Scanning electronic microscopy - SEM - Sintering properties - Thermal conductivity measurements - Wide-band-gap semiconductor  - XRD analysis

Classification code:931.3 Atomic and Molecular Physics - 901 Engineering Profession - 812.2 Refractories - 812.1 Ceramics - 801 Chemistry - 714.2 Semiconductor Devices and Integrated Circuits - 641.2 Heat Transfer - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 541.1 Aluminum

DOI:10.1016/j.solidstatesciences.2011.01.023

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 25>

 

Accession number:20112214012679

Title:Mammographic mass segmentation: Embedding multiple features in vector-valued level set in ambiguous regions

Authors:Wang, Ying (1); Tao, Dacheng (2); Gao, Xinbo (1); Li, Xuelong (3); Wang, Bin (1)

Author affiliation:(1) School of Electronic Engineering, Xidian University, Xi'an, China; (2) School of Computer Engineering, Nanyang Technological University, Singapore, Singapore; (3) Center for OPTical IMagery Analysis and Learning (OPTIMAL), Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, Shaanxi, China; (4) Centre for Quantum Computation and Intelligent Systems, Faculty of Engineering and Information Technology, University of Technology, Sydney, Australia

Corresponding author:Tao, D.(dacheng.tao@uts.edu.au)

Source title:Pattern Recognition

Abbreviated source title:Pattern Recogn.

Volume:44

Issue:9

Issue date:September 2011

Publication year:2011

Pages:1903-1915

Language:English

ISSN:00313203

CODEN:PTNRA8

Document type:Conference article (CA)

Publisher:Elsevier Ltd, Langford Lane, Kidlington, Oxford, OX5 1GB, United Kingdom

Abstract:Mammographic mass segmentation plays an important role in computer-aided diagnosis systems. It is very challenging because masses are always of low contrast with ambiguous margins, connected with the normal tissues, and of various scales and complex shapes. To effectively detect true boundaries of mass regions, we propose a feature embedded vector-valued contour-based level set method with relaxed shape constraint. In particular, we initially use the contour-based level set method to obtain the initial boundaries on the smoothed mammogram as the shape constraint. To prevent the contour leaking and meanwhile preserve the radiative characteristics of specific malignant masses, afterward, we relax the obtained shape constraint by analyzing possible valid regions around the initial boundaries. The relaxed shape constraint is then used to design a novel stopping function for subsequent vector-valued level set method. Since texture maps, gradient maps, and the original intensity map can reflect different characteristics of the mammogram, we integrate them together to obtain more accurate segmentation by incorporating the new stopping function into the newly proposed feature embedded vector-valued contour-based level set method. The experimental results suggest that the proposed feature embedded vector-valued contour-based level set method with relaxed shape constraint can effectively find ambiguous margins of the mass regions. Comparing against existing active contours methods, the new scheme is more effective and robust in detecting complex masses. &copy; 2010 Elsevier Ltd. All rights reserved.

Number of references:43

Main heading:Numerical methods

Controlled terms:Computer aided diagnosis - Drop breakup - Level measurement - Mammography - Tissue - Vectors - X ray screens

Uncontrolled terms:Computer-aided diagnose - Mammograms - Mass segmentation - Relaxed shape constraint - Vector valued

Classification code:931.2 Physical Properties of Gases, Liquids and Solids - 921.6 Numerical Methods - 921.1 Algebra - 943.2 Mechanical Variables Measurements - 746 Imaging Techniques - 461.1 Biomedical Engineering - 422.1 Strength of Building Materials : Test Equipment - 461.2 Biological Materials and Tissue Engineering

DOI:10.1016/j.patcog.2010.08.002

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

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Accession number:20122715188506

Title:Local adaptive dictionary based image denoising

Authors:Tang, Yi (1); Yuan, Yuan (1); Yan, Pingkun (1); Li, Xuelong (1); Zhou, Hui (2); Li, Luoqing (2)

Author affiliation:(1) Center for OPTical IMagery Analysis and Learning (OPTIMAL), Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, Shaanxi, China; (2) Faculty of Mathematics and Computer Science, Hubei University, Wuhan, Hubei, China

Corresponding author:Tang, Y.

Source title:1st Asian Conference on Pattern Recognition, ACPR 2011

Abbreviated source title:Asian Conf. Pattern Recogn., ACPR

Monograph title:1st Asian Conference on Pattern Recognition, ACPR 2011

Issue date:2011

Publication year:2011

Pages:412-416

Article number:6166564

Language:English

ISBN-13:9781457701221

Document type:Conference article (CA)

Conference name:1st Asian Conference on Pattern Recognition, ACPR 2011

Conference date:November 28, 2011 - November 28, 2011

Conference location:Beijing, China

Conference code:90727

Publisher:IEEE Computer Society, 445 Hoes Lane - P.O.Box 1331, Piscataway, NJ 08855-1331, United States

Abstract:In this paper, the problem of balancing the noise removing and the image details preserving is considered. To remove noise adaptively, local dictionaries and sparse coding techniques are used. For a noised image patch, the local dictionary corresponding to it and the sparse coding technique are used to generate the sparse coding vector of the given patch. Then the noise of the given patch can be removed without any information on noise level by setting all components be zero but preserving largest component of the sparse coding vector. Because too much information on image details are removed with noise by the above process, a local weighted regression is adopted to refine the denoising image with the help of the information on the local geometry structure of noised image. Various experiments have been accomplished and prove our method to be effective in balancing the noise removing and the image details preserving. &copy; 2011 IEEE.

Number of references:23

Main heading:Image coding

Controlled terms:Image denoising - Pattern recognition

Uncontrolled terms:adaptive - De-noising - Image de-nosing - Image patches - Local geometry - Local weighted regression - Local-adaptive - Noise levels - Noise removing - REmove noise  - Sparse coding

Classification code:716 Telecommunication; Radar, Radio and Television - 716.1 Information Theory and Signal Processing - 741 Light, Optics and Optical Devices

DOI:10.1109/ACPR.2011.6166564

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

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Accession number:20114514492374

Title:Wideband slow light with ultralow dispersion in a W1 photonic crystal waveguide

Authors:Liang, Jian (1); Ren, Li-Yong (1); Yun, Mao-Jin (2); Wang, Xing-Jun (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 710119, China; (2) College of Physics Science, Qingdao University, Qingdao 266071, China; (3) State Key Laboratory on Advanced Optical Communication Systems and Networks, Peking University, Beijing 100871, China

Corresponding author:Ren, L.-Y.(renliy@opt.ac.cn)

Source title:Applied Optics

Abbreviated source title:Appl. Opt.

Volume:50

Issue:31

Issue date:November 1, 2011

Publication year:2011

Pages:G98-G103

Language:English

ISSN:1559128X

E-ISSN:15394522

CODEN:APOPAI

Document type:Journal article (JA)

Publisher:Optical Society of America, 2010 Massachusetts Ave, NW, Washington, DC, DC 20036-1023, United States

Abstract:A dispersion tailoring scheme for obtaining slow light in a silicon-on-insulator W1-type photonic crystal waveguide, novel to our knowledge, is proposed in this paper. It is shown that, by simply shifting the first two rows of air holes adjacent to the waveguide to specific directions, slow light with large groupindex, wideband, and low group-velocity dispersion can be realized. Defining a criterion of restricting the group-index variation within a &plusmn;0.8% range as a flattened region, we obtain the ultraflat slow light with bandwidths over 5.0, 4.0, 2.5, and 1.0 nm when keeping the group index at 38.0, 48.8, 65.2, and 100.4, respectively. Numerical simulations are performed utilizing the three-dimensional (3D) plane-wave expansion method and the 3D finite-difference time-domain method. &copy; 2011 Optical Society of America.

Number of references:27

Main heading:Slow light

Controlled terms:Dispersion (waves) - Finite difference time domain method - Numerical methods - Optical waveguides - Photonic crystals - Three dimensional - Time domain analysis - Waveguides

Uncontrolled terms:Air holes - Group index - Photonic crystal waveguide - Plane wave expansion method - Silicon on insulator - Three-dimensional (3D) - UltraFlat - Wide-band

Classification code:921.6 Numerical Methods - 921 Mathematics - 902.1 Engineering Graphics - 741.3 Optical Devices and Systems - 741.1 Light/Optics - 714.3 Waveguides - 711.1 Electromagnetic Waves in Different Media

DOI:10.1364/AO.50.000G98

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

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Accession number:20111213849924

Title:A relay level set method for automatic image segmentation

Authors:Gao, Xinbo (1); Wang, Bin (1); Tao, Dacheng (2); Li, Xuelong (3)

Author affiliation:(1) School of Electronic Engineering, Xidian University, Xi'an 710071, China; (2) Centre for Quantum Computation and Intelligent Systems, Faculty of Engineering and Information Technology, University of Technology, Sydney, NSW 2007, Australia; (3) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, Shaanxi, China

Corresponding author:Gao, X.(xbgao@mail.xidian.edu.cn)

Source title:IEEE Transactions on Systems, Man, and Cybernetics, Part B: Cybernetics

Abbreviated source title:IEEE Trans Syst Man Cybern Part B Cybern

Volume:41

Issue:2

Issue date:April 2011

Publication year:2011

Pages:518-525

Article number:5582310

Language:English

ISSN:10834419

CODEN:ITSCFI

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc., 445 Hoes Lane / P.O. Box 1331, Piscataway, NJ 08855-1331, United States

Abstract:This paper presents a new image segmentation method that applies an edge-based level set method in a relay fashion. The proposed method segments an image in a series of nested subregions that are automatically created by shrinking the stabilized curves in their previous subregions. The final result is obtained by combining all boundaries detected in these subregions. The proposed method has the following three advantages: 1) It can be automatically executed without humancomputer interactions; 2) it applies the edge-based level set method with relay fashion to detect all boundaries; and 3) it automatically obtains a full segmentation without specifying the number of relays in advance. The comparison experiments illustrate that the proposed method performs better than the representative level set methods, and it can obtain similar or better results compared with other popular segmentation algorithms. &copy; 2006 IEEE.

Number of references:38

Main heading:Image segmentation

Controlled terms:Drop breakup - Evolutionary algorithms - Level measurement - Numerical methods - Optimization - Partial differential equations

Uncontrolled terms:Automatic image segmentation - Edge-based - Energy minimization - Finite difference - geometric active contour - Human-computer - Level Set method - relay level set - Segmentation algorithms - Segmentation methods

Classification code:723 Computer Software, Data Handling and Applications - 723.2 Data Processing and Image Processing - 921 Mathematics - 931.2 Physical Properties of Gases, Liquids and Solids - 943.2 Mechanical Variables Measurements

DOI:10.1109/TSMCB.2010.2065800

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

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Accession number:20113614296279

Title:Three mirror anastigmatic zoom system using deformable mirrors

Authors:Zhao, Xin (1); Xie, Yong-Jun (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 710119, China

Corresponding author:Xie, Y.-J.(jyxie@opt.ac.cn)

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8196

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2011: Space Exploration Technologies and Applications

Issue date:2011

Publication year:2011

Article number:81961F

Language:English

ISSN:0277786X

CODEN:PSISDG

ISBN-13:9780819488374

Document type:Conference article (CA)

Conference name:International Symposium on Photoelectronic Detection and Imaging 2011: Space Exploration Technologies and Applications

Conference date:May 24, 2011 - May 26, 2011

Conference location:Beijing, China

Conference code:86296

Sponsor:Chinese Society of Astronautics (CAS)

Publisher:SPIE, P.O. Box 10, Bellingham, WA 98227-0010, United States

Abstract:In order to optically vary the effect focal length of optical zoom system, adds two or more active optics which could supply variable the focal length, and create an imaging system with variable optical magnification that has no macroscopic moving parts. Based on this design concept, and connected with off-axis three-mirror reflective optical system design, we have presented preliminary modeling showing that active optical elements can be used as to create a zoom system that the effective focal length from 1000 mm to 3000 mm in ZEMAX, the FOV(Field of view) is 16&deg;&times;2&deg; -6.87&deg;&times;0. 86&deg;, and the F/# is 5-15, the whole system is composed of 3 reflective mirrors(DM, Deformable Mirrors). In order to zoom system, the F/# and three reflective mirror's radius, were variable. The MTF more than 0.45 at the spatial frequency of 42lp/mm and approaches the diffraction limit, the maximum RMS spot diameter less than detector's size. The results show that the imaging quality can satisfy the requirement of the system. &copy; 2011 SPIE.

Number of references:12

Main heading:Mirrors

Controlled terms:Deformation - Detectors - Focusing - Optical design - Optical systems - Space research - Systems analysis

Uncontrolled terms:Active Optics - Deformable mirrors - Design concept - Diffraction limits - Effective focal lengths - Field of views - Focal lengths - Imaging quality - Moving parts - Off-axis  - Optical zoom systems - Preliminary modeling - Reflective mirrors - Reflective optical system - Spatial frequency - Spot diameter - Three mirrors - Whole systems - Zoom systems

Classification code:961 Systems Science - 914 Safety Engineering - 741.3 Optical Devices and Systems - 741.1 Light/Optics - 656.2 Space Research - 422 Strength of Building Materials; Test Equipment and Methods - 421 Strength of Building Materials; Mechanical Properties

DOI:10.1117/12.900730

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

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Accession number:20113414264436

Title:Image quality assessment based on S-CIELAB model

Authors:He, Lihuo (1); Gao, Xinbo (1); Lu, Wen (1); Li, Xuelong (2); Tao, Dacheng (3)

Author affiliation:(1) School of Electronic Engineering, Xidian University, 710071 Xi'an, 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, 71011 Xi'an, China; (3) School of Computer Engineering, Nanyang Technological University, 50 Nanyang Avenue, Blk N4, Singapore 639798, Singapore

Corresponding author:Gao, X.(xbgao.xidian@gmail.com)

Source title:Signal, Image and Video Processing

Abbreviated source title:Signal Image Video Process.

Volume:5

Issue:3

Issue date:September 2011

Publication year:2011

Pages:283-290

Language:English

ISSN:18631703

E-ISSN:18631711

Document type:Journal article (JA)

Publisher:Springer London, The Guildway, Old Portsmouth Road, Artington, Guildford, GU3 1LP, United Kingdom

Abstract:This paper proposes a new image quality assessment framework which is based on color perceptual model. By analyzing the shortages of the existing image quality assessment methods and combining the color perceptual model, the general framework of color image quality assessment based on the S-CIELAB color space is presented. The S-CIELAB color model, a spatial extension of CIELAB, has an excellent performance for mimicking the perceptual processing of human color vision. This paper incorporates excellent color perceptual characteristics model with the geometrical distortion measurement to assess the image quality. First, the reference and distorted images are transformed into S-CIELAB color perceptual space, and the transformed images are evaluated by existing metric in three color perceptual channels. The fidelity factors of three channels are weighted to obtain the image quality. Experimental results achieved on LIVE database II shows that the proposed methods are in good consistency with human subjective assessment results. &copy; 2011 Springer-Verlag London Limited.

Number of references:19

Main heading:Image quality

Controlled terms:Color - Color image processing - Color vision - Rating

Uncontrolled terms:Color image quality - Color models - Color space - Distorted images - Excellent performance - Geometrical distortion - Human color vision - Image quality assessment - Perceptual channels - Perceptual characteristics  - Perceptual model - Perceptual processing - S-CIELAB - Spatial extension - Subjective assessments - Three channel

Classification code:741 Light, Optics and Optical Devices - 902.2 Codes and Standards

DOI:10.1007/s11760-010-0200-x

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

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Accession number:20114114413595

Title:InAs/GaSb superlattices grown by LP-MOCVD for &sim;10 &mu;m wavelength infrared range

Authors:Chang, Yuchun (1); Wang, Tao (2); Yin, Fei (2); Wang, Jingwei (2); Song, Zhenyu (1); Wang, Yiding (1); Yin, Jingzhi (1)

Author affiliation:(1) State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun, China; (2) Xi'An Institute of Optics and Precision Mechanism, Chinese Academy of Sciences, Xi'an, China

Corresponding author:Yin, J.(yjz886666@yahoo.com.cn)

Source title:Infrared Physics and Technology

Abbreviated source title:Infrared Phys Technol

Volume:54

Issue:6

Issue date:November 2011

Publication year:2011

Pages:478-481

Language:English

ISSN:13504495

CODEN:IPTEEY

Document type:Journal article (JA)

Publisher:Elsevier, P.O. Box 211, Amsterdam, 1000 AE, Netherlands

Abstract:A type-II InAs/GaSb superlattice (SL) was grown on Te-doped (1 0 0) GaSb substrate by low pressure metal organic chemical vapor deposition (LP-MOCVD). The samples were obtained at different growth temperatures and with different interface layers. By introducing an InAsSb interface layer between InAs and GaSb, a good surface morphology of the superlattice was achieved when the sample growth temperature was around 500-520 &deg;C. The photoluminescence (PL) peak wavelength of the sample was 10.7 &mu;m at 77 K, with FWHM of &sim;30 meV. &copy; 2011 Elsevier B.V. All rights reserved.

Number of references:25

Main heading:Indium antimonides

Controlled terms:Gallium alloys - Growth temperature - Indium arsenide - Metallorganic chemical vapor deposition - MOS devices - Organic chemicals - Organometallics - Superlattices

Uncontrolled terms:InAs - InAs/GaSb superlattices - InAsSb interface layer - Infrared range - Interface layer - Low-pressure metal-organic chemical vapor depositions - LP-MOCVD - Peak wavelength

Classification code:531 Metallurgy and Metallography - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 714.2 Semiconductor Devices and Integrated Circuits - 802.2 Chemical Reactions - 804 Chemical Products Generally

DOI:10.1016/j.infrared.2011.07.009

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

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Accession number:20114114414394

Title:Vehicle detection and motion analysis in low-altitude airborne video under urban environment

Authors:Cao, Xianbin (1); Wu, Changxia (2); Lan, Jinhe (2); Yan, Pingkun (3); Li, Xuelong (3)

Author affiliation:(1) School of Electronic and Information Engineering, Beihang University, Beijing 100083, China; (2) University of Science and Technology of China, Hefei 230026, China; (3) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Cao, X.(xbcao@buaa.edu.cn)

Source title:IEEE Transactions on Circuits and Systems for Video Technology

Abbreviated source title:IEEE Trans Circuits Syst Video Technol

Volume:21

Issue:10

Monograph title:SPECIAL ISSUE ON VIDEO ANALYSIS ON RESOURCE-LIMITED SYSTEMS

Issue date:October 2011

Publication year:2011

Pages:1522-1533

Article number:5955106

Language:English

ISSN:10518215

CODEN:ITCTEM

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc., 445 Hoes Lane / P.O. Box 1331, Piscataway, NJ 08855-1331, United States

Abstract:Visual surveillance from low-altitude airborne platforms plays a key role in urban traffic surveillance. Moving vehicle detection and motion analysis are very important for such a system. However, illumination variance, scene complexity, and platform motion make the tasks very challenging. In addition, the used algorithms have to be computationally efficient in order to be used on a real-time platform. To deal with these problems, a new framework for vehicle detection and motion analysis from low-altitude airborne videos is proposed. Our paper has two major contributions. First, to speed up feature extraction and to retain additional global features in different scales for higher classification accuracy, a boosting light and pyramid sampling histogram of oriented gradients feature extraction method is proposed. Second, to efficiently correlate vehicles across different frames for vehicle motion trajectories computation, a spatio-temporal appearance-related similarity measure is proposed. Compared to other representative existing methods, our experimental results showed that the proposed method is able to achieve better performance with higher detection rate, lower false positive rate, and faster detection speed. &copy; 2011 IEEE.

Number of references:38

Main heading:Aircraft detection

Controlled terms:Feature extraction - Security systems - Urban planning - Vehicles

Uncontrolled terms:Airborne platforms - Airborne video - Classification accuracy - Computationally efficient - Detection rates - Different scale - False positive rates - Feature extraction methods - Global feature - Low-altitude  - Motion analysis - Moving vehicles - Platform motion - Real-time platform - Scene complexity - Similarity measure - Spatio-temporal - Urban environments - Urban traffic surveillance - Vehicle detection  - Vehicle motion - Visual surveillance

Classification code:403.1 Urban Planning and Development - 432 Highway Transportation - 716 Telecommunication; Radar, Radio and Television - 716.2 Radar Systems and Equipment - 914.1 Accidents and Accident Prevention

DOI:10.1109/TCSVT.2011.2162274

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

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Accession number:20112314043575

Title:Detection and fitting of pulse profile for x-ray pulsar navigation system

Authors:Chen, Baomei (1); Zhao, Baosheng (1); Hu, Huijun (1); Sheng, Lizhi (1); Yan, Qiurong (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 710119, China; (2) Graduate University of Chinese Academy of Sciences, Beijing 100049, China

Corresponding author:Chen, B.(04cbm@live.cn)

Source title:Guangxue Xuebao/Acta Optica Sinica

Abbreviated source title:Guangxue Xuebao

Volume:31

Issue:5

Issue date:May 2011

Publication year:2011

Article number:0534002

Language:Chinese

ISSN:02532239

CODEN:GUXUDC

Document type:Journal article (JA)

Publisher:Chinese Optical Society, P.O. Box 80, Xi'an, 710068, China

Abstract:Several new methods to improve the time accuracy and resolution based on the original X pulsar navigation ground simulation system are proposed. By these proposed methods, the accuracy and real-time performance of the spacecraft navigation has been enhanced. The methods adopted include: 1) enhancing the performance of the photon counting detector based on micro-channel plate (MCP); 2) using time measurement system with high accuracy. The pulse profile of the original detection system is compared with the pulse profile of the improved detection system, and the gain of MCP which has influence on the detected pulse profile is discussed. The experimental results show that the counting rate of improved detection system becomes higher under the same experimental condition. When the operating voltage of MCP is-800 V in the improved detection system, and the value of Bin is 1.5 ms, a pulse profile with good signal-to-noise ratio (SNR) can be acquired after being integrated for 200 s.

Number of references:14

Main heading:Detectors

Controlled terms:Electromagnetic wave emission - Image storage tubes - Navigation - Navigation systems - Photons - Signal to noise ratio

Uncontrolled terms:Counting rates - Detection system - Experimental conditions - Measurement system - Micro channel plate - Operating voltage - Photon counting detector - Photon counting detectors - Pulse profile - Pulse profile fitting  - Pulse's time of arrival measurement - Real time performance - Signal to noise - Simulation systems - Spacecraft navigation - X-ray pulsar navigation - X-ray pulsars

Classification code:914 Safety Engineering - 741.1 Light/Optics - 716.3 Radio Systems and Equipment - 716.1 Information Theory and Signal Processing - 714.1 Electron Tubes - 711 Electromagnetic Waves - 434.4 Waterway Navigation

DOI:10.3788/AOS201131.0534002

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

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Accession number:20113614305247

Title:Tunable and robust reflection-free waveguides based on a gyromagnetic photonic crystal

Authors:Lu, H. (1); Liu, X.M. (1); Zhou, R. (1); Mao, D. (1); Gong, Y. (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 710119, China

Corresponding author:Liu, X.M.(liuxm@opt.ac.cn)

Source title:Journal of Electromagnetic Waves and Applications

Abbreviated source title:J Electromagn Waves Appl

Volume:25

Issue:11-12

Issue date:2011

Publication year:2011

Pages:1752-1761

Language:English

ISSN:09205071

E-ISSN:15693937

CODEN:JEWAE5

Document type:Journal article (JA)

Publisher:VSP BV, P.O.Box 9000, Leiden, 2300 PA, Netherlands

Abstract:We propose and numerically investigate a kind of tunable and robust reflection-free waveguides based on a gyromagnetic photonic crystal (PC). The time reversal symmetry breaking of the gyromagnetic PC under out-of-plane dc magnetic fields gives rise to one-way edge modes in both the second and third band gaps. It is found that the propagating properties of one-way modes in the waveguides can be easily controlled by adjusting the directions of external magnetic fields. Moreover, the one-way modes are robust against the disorder in the waveguides. &copy; Koninklijke Brill NV, Leiden, 2011.

Number of references:33

Main heading:Waveguides

Controlled terms:Magnetic fields - Photonic crystals

Uncontrolled terms:Band gaps - DC magnetic field - External magnetic field - Out-of-plane - Time reversal symmetries

Classification code:701.2 Magnetism: Basic Concepts and Phenomena - 714.3 Waveguides - 933.1 Crystalline Solids

DOI:10.1163/156939311797164882

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

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Accession number:20111413889859

Title:Coexistence of strong and weak pulses in a fiber laser with largely anomalous dispersion

Authors: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 710119, China

Corresponding author:Liu, X.(liuxm@opt.ac.c)

Source title:Optics Express

Abbreviated source title:Opt. Express

Volume:19

Issue:7

Issue date:March 28, 2011

Publication year:2011

Pages:5874-5887

Language:English

E-ISSN:10944087

Document type:Journal article (JA)

Publisher:Optical Society of America, 2010 Massachusetts Ave, NW, Washington, DC, DC 20036-1023, United States

Abstract:The coexistence of weakly sech-shaped solitons and strongly dissipative solitons is experimentally observed in an ultra-large net-anomalous-dispersion mode-locked fiber laser for the first time to author's best knowledge. Both sech-shaped and dissipative solitons appear to be the asymmetrically combined pulse state with one pulse component much smaller than the other. The energy of dissipative solitons is over three orders of magnitude larger than that of sech-shaped solitons. Two different types of pulse-shaping mechanisms coexist in the laser: one is the dissipative processes and the other is the balance between anomalous dispersion and nonlinear Kerr effect. Numerical simulations and analysis confirm the experimental observations. &copy; 2011 Optical Society of America.

Number of references:41

Main heading:Mode-locked fiber lasers

Controlled terms:Dispersions - Fiber lasers - Kerr magnetooptical effect - Magnetic field effects - Solitons

Uncontrolled terms:Anomalous dispersion - Combined pulse - Dissipative process - Dissipative solitons - Experimental observation - Kerr effects - Numerical simulation - Pulse components - Pulse-shaping - Three orders of magnitude

Classification code:701.2 Magnetism: Basic Concepts and Phenomena - 744.1 Lasers, General - 744.4 Solid State Lasers - 931.3 Atomic and Molecular Physics - 951 Materials Science

DOI:10.1364/OE.19.005874

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

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Accession number:20112414050864

Title:Parallel two-step phase-shifting microscopic interferometry based on a cube beamsplitter

Authors:Gao, Peng (1); Yao, Baoli (1); Min, Junwei (1); Guo, Rongli (1); Zheng, Juanjuan (1); Ye, Tong (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 710119, China; (2) Graduate School, Chinese Academy of Sciences, Beijing 100039, China

Corresponding author:Yao, B.(yaobl@opt.ac.cn)

Source title:Optics Communications

Abbreviated source title:Opt Commun

Volume:284

Issue:18

Issue date:August 15, 2011

Publication year:2011

Pages:4136-4140

Language:English

ISSN:00304018

CODEN:OPCOB8

Document type:Journal article (JA)

Publisher:Elsevier, P.O. Box 211, Amsterdam, 1000 AE, Netherlands

Abstract:Parallel two-step phase-shifting interferometry for microscopy is presented, and the recording condition for generalized two-step phase-shifting interferometry is discussed. A 45&deg; tilted cube beamsplitter enables to replicate the orthogonally linear polarized object and reference waves into two parallel beams, respectively. As a consequence, two interferograms with quadrature phase shift are obtained along the two beams, and phase reconstructed with an improved algorithm. To reconstruct the phase distribution from the two-step phase-shifting interferograms, a certain recording condition should be satisfied. However, the recording condition has not ever been discussed before. In this paper, the recording condition for the two-step phase-shifting interferometry is derived and that is: the intensity of reference wave should be no less than two times object wave intensity. &copy; 2011 Elsevier B.V. All rights reserved.

Number of references:30

Main heading:Holographic interferometry

Controlled terms:Computer generated holography

Uncontrolled terms:Digital holography microscopies - Improved algorithm - Interferograms - Object waves - Parallel beams - Phase distribution - Phase shifting Interferometry - Phase-shifting - Quadrature phase shifts - Reference waves  - Two beams

Classification code:723.5 Computer Applications - 941.4 Optical Variables Measurements

DOI:10.1016/j.optcom.2011.04.049

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

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Accession number:20113314234894

Title:Design proposal of a Fourier telescopy transmitter for moving objects in low earth orbit

Authors:Luo, Xiu-Juan (1); Ma, Cai-Wen (1); Zhang, Yu (1); Si, Qing-Dan (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Acad. of Sci., Xi'an 710119, China

Corresponding author:Luo, X.-J.(xj_luo@opt.ac.cn)

Source title:Shenzhen Daxue Xuebao (Ligong Ban)/Journal of Shenzhen University Science and Engineering

Abbreviated source title:Shenzhen Daxue Xuebao (Ligong Ban)

Volume:28

Issue:4

Issue date:July 2011

Publication year:2011

Pages:325-329

Language:Chinese

ISSN:10002618

CODEN:SDXLEX

Document type:Journal article (JA)

Publisher:Editorial Office of Journal of Shenzhen University, Shenzhen University, Shenzhen, 518060, China

Abstract:For the purpose of using high-resolution to detect and identify low earth orbit (LEO) moving space objects, a proposal of the Fourier telescopy transmitter array disposition was presented, and a single transmitter was designed. The proposed transmitter system integrated the atmospheric aberration measurement system, the feedback control system, and the target tracking system. It used atmospheric turbulence wave-front correction and correlative tracking techniques to achieve accurate tracking of fast moving objects, simultaneously emitted multiple interference laser beams sweeping across the target to improve imaging speed, and carried out computer simulation on interference between laser beam pairs and laser propagation along slant paths through turbulence atmosphere. Theoretical analysis and simulation results show that the design from the proposal is reasonably feasible and meets the goal of the rapid LEO objects imaging on Fourier telescopy transmitter design.

Number of references:12

Main heading:Target tracking

Controlled terms:Adaptive control systems - Atmospheric thermodynamics - Atmospheric turbulence - Communication satellites - Computer simulation - Design - Earth (planet) - Feedback control - Fourier transforms - Laser beams  - Navigation - Optical telescopes - Orbits - Space research - Transmitters

Uncontrolled terms:Active imaging - Fourier telescopy - High spatial resolution - Long-baseline interferometry - Low earth orbit satellites - Moving target tracking - Space explorations

Classification code:744.8 Laser Beam Interactions - 741.3 Optical Devices and Systems - 731.1 Control Systems - 723.5 Computer Applications - 716 Telecommunication; Radar, Radio and Television - 921.3 Mathematical Transformations - 657 Space Physics - 656.1 Space Flight - 655.2 Satellites - 443.1 Atmospheric Properties - 408 Structural Design - 656.2 Space Research

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

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Accession number:20114114413597

Title:Theoretical study of all-optical RZ to NRZ format conversion based on cascaded nanoporous silicon waveguides

Authors:Wu, Jian-Wei (1)

Author affiliation:(1) Chongqing Key Laboratory of Optical Engineering, Chongqing Normal University, Chongqing 400047, China; (2) College of Physics and Electronic Engineering, Chongqing Normal University, Chongqing 400047, China; (3) State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China; (4) State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Wu, J.-W.(jwwu05@gmail.com)

Source title:Infrared Physics and Technology

Abbreviated source title:Infrared Phys Technol

Volume:54

Issue:6

Issue date:November 2011

Publication year:2011

Pages:465-468

Language:English

ISSN:13504495

CODEN:IPTEEY

Document type:Journal article (JA)

Publisher:Elsevier, P.O. Box 211, Amsterdam, 1000 AE, Netherlands

Abstract:In this paper, we present that the strong free carrier absorption and short carrier lifetime in nanoporous silicon waveguide can perform effectively the return-to-zero (RZ) to non-return-to zero (NRZ) format conversion. The project presented consisting of two cascaded millimeters long nanoporous silicon waveguides is numerically simulated and investigated at 5 Gbit/s. Numerical results clearly show that the outcome converted signal (NRZ) at the end of proposed device can be effectively optimized (e.g. clearer extinction ratio - ER, higher Q-factor, and lower bit-error rate - BER) by means of suitably choosing the system parameters such as initial RZ peak level and nanoporous silicon waveguide length. &copy; 2011 Elsevier B.V. All rights reserved.

Number of references:19

Main heading:Waveguides

Controlled terms:Bit error rate - Carrier lifetime - Integrated optics - Nonlinear optics - Optical frequency conversion

Uncontrolled terms:All-optical - Extinction ratios - Format conversion - Free carrier absorption - Nano-porous silicon - Non-return-to zero - Numerical results - Q-factors - Return-to-zero - Theoretical study  - Ultrafast process

Classification code:714.2 Semiconductor Devices and Integrated Circuits - 714.3 Waveguides - 723.1 Computer Programming - 741.1.1 Nonlinear Optics - 741.3 Optical Devices and Systems

DOI:10.1016/j.infrared.2011.07.011

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

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Accession number:20140817360214

Title:Enhanced low-index field confinement by radially stratified micro optical fibers

Authors:Zhang, Wenfu (1); Mu, Jian-Wei (3); Huang, Wei-Ping (3); Zhao, Wei (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 710119, China; (2) Graduate School of the Chinese Academy of Sciences, Beijing 100049, China; (3) Department of Electrical and Computer Engineering, McMaster University, Hamilton, ON L8S 4K1, Canada

Corresponding author:Zhang, W.(wfu.zhang@gmail.com)

Source title:Optics InfoBase Conference Papers

Abbreviated source title:Opt.InfoBase Conf. Papers

Monograph title:Specialty Optical Fibers, SOF 2011

Issue date:2011

Publication year:2011

Language:English

E-ISSN:21622701

ISBN-13:9781557529138

Document type:Conference article (CA)

Conference name:Specialty Optical Fibers, SOF 2011

Conference date:June 12, 2011  -  June 15, 2011

Conference location:Toronto, Canada

Conference code:104079

Publisher:Optical Society of America, 2010 Massachusetts Ave, NW, Washington, DC, DC 20036-1023, United States

Abstract:The ring micro-fiber is studied. The calculating results show that light can be concentrated in nanometer-thin low-index ring regions with very high confinement efficiency. &copy; OSA/ANIC/IPR/Sensors/SL/SOF/SPPCom/2011.

Number of references:4

Main heading:Optical fibers

Uncontrolled terms:High confinement - Micro-fiber

Classification code:741.1.2 Fiber Optics

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 40>

 

Accession number:20114414481658

Title:Measurement of focal spot centroid based on image processing

Authors:Xia, Ai-Li (1); Ma, Cai-Wen (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Xia, A.-L.(xia_aili@163.com)

Source title:Guangdianzi Jiguang/Journal of Optoelectronics Laser

Abbreviated source title:Guangdianzi Jiguang

Volume:22

Issue:10

Issue date:October 2011

Publication year:2011

Pages:1542-1545

Language:Chinese

ISSN:10050086

CODEN:GUJIE9

Document type:Journal article (JA)

Publisher:Board of Optronics Lasers, No. 47 Yang-Liu-Qing Ying-Jian Road, Tian-Jin City, 300380, China

Abstract:A new method for enhancing the detection accuracy of the centroid of focal spot is put forward based on the image procesing techniques. After the Hartmann-Shark (H-S) wavefront sensor gets a series of focal spot array images, the subaperture detection windows are optimized by the adaptive threshold method for the optimum matching between the detection windows and the corresponding focal spots distribution areas and then the linear interpolation is used in the detection windows for higher precision image which is more similar to the original image. Furthermore, the image noise in the detection window is smoothed, so the detection accuracy of the sensor is improved. The experimental results demonstrate that the precision, repeatability and stability of focal spot centroid measurement by the proposed method are better than the results obtained via the traditional centroid methods.

Number of references:15

Main heading:Focusing

Controlled terms:Image processing - Imaging systems - Interpolation - Numerical control systems - Optical data processing - Sensors - Wavefronts

Uncontrolled terms:Adaptive thresholds - Focal spot - Hartmann-Shark (H-S)wavefront sensor - Image processing technique - Linear Interpolation

Classification code:921.6 Numerical Methods - 801 Chemistry - 746 Imaging Techniques - 741 Light, Optics and Optical Devices - 731.1 Control Systems - 711.1 Electromagnetic Waves in Different Media - 711 Electromagnetic Waves

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 41>

 

Accession number:20120314688090

Title:Electrical pulse generation technology for laser pulse shaping

Authors:Gou, Yongsheng (1); Liu, Baiyu (1); Zhang, Wei (1); Bai, Yonglin (1); Bai, Xiaohong (1); Yang, Wenzheng (1); Qin, Junjun (1); Wang, Bo (1)

Author affiliation:(1) Key Laboratory of Ultrafast Diagnostics of Chinese Academy of Sciences, Xi'an Institute of Optics and Precision Mechanics, CAS, Xi'an 710119, China; (2) Graduate University of the Chinese Academy of Sciences, Beijing 100049, China

Corresponding author:Gou, Y.(yshgou@163.com)

Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering

Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.

Volume:40

Issue:11

Issue date:November 2011

Publication year:2011

Pages:2191-2194

Language:Chinese

ISSN:10072276

Document type:Journal article (JA)

Publisher:Chinese Society of Astronautics, P.O. Box 225-32, Tianjin, 300192, China

Abstract:A new circuit to generate ultra-wide-band pulse for laser pulse shaping used in "Shen Guang III" device was presented in this paper. This circuit was based on the characteristics of the step recovery diode (SRD) that the quantity of the carriers in the middle layer was controllable, the SRD had little parasitical capacitor and it would cut off rapidly. The pulse generation circuit was designed by combining the SRD in series and parallel. The ultra-wide-band pulse was tested specifically and test results of the practical circuit were given and analyzed in physical level. They were tallied with the theoretical results. This pulse generation circuit could output a pulse with amplitude about 10 V and pulse width about 150 ps. The trigger jitter of the pulse was less than 3 ps, amplitude stability was better than 3%. Thus, this circuit can meet the requirement of the pulse shaping.

Number of references:10

Main heading:Pulse generators

Controlled terms:Laser pulses - Pulse shaping circuits - Ultra-wideband (UWB)

Uncontrolled terms:Amplitude stability - Cut-off - Electrical pulse generation - Middle layer - Parasitical capacitors - Physical level - Pico-second pulse - Pulse generation - Pulse width - Pulse-shaping  - Step recovery diode (SRD) - Step recovery diodes - Theoretical result

Classification code:713.4 Pulse Circuits - 716.3 Radio Systems and Equipment - 744.1 Lasers, General

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 42>

 

Accession number:20114614525175

Title:Correction of CCD noise in light field distribution measurement

Authors:Liu, Lili (1); Da, Zhengshang (1); Tian, Xinfeng (1); Duan, Yaxuan (1); Li, Dongjian (1); Sun, Ce (1); Dong, Xiaona (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Da, Z.(dazhengshang@opt.ac.cn)

Source title:Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams

Abbreviated source title:Qiangjiguang Yu Lizishu

Volume:23

Issue:9

Issue date:September 2011

Publication year:2011

Pages:2346-2350

Language:Chinese

ISSN:10014322

CODEN:QYLIEL

Document type:Journal article (JA)

Publisher:Editorial Office of High Power Laser and Particle Beams, P.O. Box 919-805, Mianyang, 621900, China

Abstract:To suppress the influences aroused by CCD noise in measuring laser near field distribution, the paper proposes a method to correct CCD noise using a priori knowledge of CCD noise and its observed value based on contrast test model. Compared with the existing method, this method can suppress the influences caused by CCD noise effectively, thus lowering measurement uncertainty and improving measurement confidence, and the extended uncertainty reduces from 0.6% to 0.3%.

Number of references:8

Main heading:Uncertainty analysis

Controlled terms:Charge coupled devices - Particle beams - Physics

Uncontrolled terms:Light field distribution - Measurement noise - Measurement uncertainty - Near fields - Near-field distribution - Priori knowledge - Test models - Uncertainty - Value-based

Classification code:714.2 Semiconductor Devices and Integrated Circuits - 922.1 Probability Theory - 931 Classical Physics; Quantum Theory; Relativity - 932 High Energy Physics; Nuclear Physics; Plasma Physics - 932.1 High Energy Physics - 933 Solid State Physics

DOI:10.3788/HPLPB20112309.2346

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 43>

 

Accession number:20104913465596

Title:General coupled-mode analysis for gain-guided, index-antiguided fibers, and index-guided fibers

Authors:Zhou, Enyu (1); Yan, Kunlun (2); Zhao, Baoyin (2); Wang, Yishan (2); Wei, Wei (2); Peng, Bo (2)

Author affiliation:(1) Department of Optical Science and Engineering, Fudan University, Shanghai 200433, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Procession Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (3) Institute of Advanced Materials, Nanjing University of Posts and Telecommunications, Nanjing 210003, China

Corresponding author:Wei, W.(iamww@fudan.edu.cn)

Source title:Optics Communications

Abbreviated source title:Opt Commun

Volume:284

Issue:4

Issue date:February 15, 2011

Publication year:2011

Pages:1034-1037

Language:English

ISSN:00304018

CODEN:OPCOB8

Document type:Journal article (JA)

Publisher:Elsevier, P.O. Box 211, Amsterdam, 1000 AE, Netherlands

Abstract:Coupling properties of two gain-guided, index-antiguided (GG + IAG) fibers, or GG + IAG fibers and index-guided (IG) fibers, were investigated by the further general coupled-mode theory. The theory can explain any situation of two fiber coupling. The interesting results were obtained by the numerical computation method. For two GG + IAG fiber coupling, total power was decreased as rising real-valued refractive-index difference (real part of refractive-index difference between core and cladding, RVRID), while the power of one GG + IAG fiber was damped oscillations with increased core separation. In the GG + IAG fiber and IG fiber coupler, the variation of the RVRID could change coupling characteristics. These results are different from two IG fibers coupling, and the general coupled-mode theory may provide meaningful references for new concepts of directional coupler and pumping technology of GG + IAG fiber. &copy; 2010 Elsevier B.V. All rights reserved.

Number of references:10

Main heading:Fibers

Controlled terms:Fiber optics - Optical waveguides

Uncontrolled terms:Coupled-mode analysis - Coupled-mode theory - Coupling characteristic - Coupling properties - Damped oscillations - Fiber couplers - Fiber couplings - Index-guided fibers - Numerical computations - Real part  - Total power

Classification code:741.1.2 Fiber Optics - 741.3 Optical Devices and Systems - 812 Ceramics, Refractories and Glass - 817 Plastics and Other Polymers: Products and Applications

DOI:10.1016/j.optcom.2010.10.067

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 44>

 

Accession number:20111313874260

Title:Luminescence properties of Nd<sup>3+</sup>-doped Y<inf>2</inf>O<inf>3</inf> nanoparticles in organic media

Authors:Cui, Xiaoxia (1); Lu, Jiabao (1); Gao, Chao (1); Hou, Chaoqi (1); Wei, Wei (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 Science (CAS), Xi'an, Shaanxi 710119, China; (2) Graduate School of the Chinese Academy of Sciences, Beijing 100039, China; (3) Institute of Advanced Materials, Nanjing University of Posts and Telecommunications, Nanjing 210003, China

Corresponding author:Wei, W.(iamwwei@njupt.edu.cn)

Source title:Applied Physics A: Materials Science and Processing

Abbreviated source title:Appl Phys A

Volume:103

Issue:1

Issue date:April 2011

Publication year:2011

Pages:27-32

Language:English

ISSN:09478396

E-ISSN:14320630

CODEN:APAMFC

Document type:Journal article (JA)

Publisher:Springer Heidelberg, Haberstrasse 7, Heidelberg, 69126, Germany

Abstract:Nd<sup>3+</sup>-doped yttrium oxide nanoparticles (Y<inf>2</inf>O <inf>3</inf>:Nd) with cubic phase were obtained successfully by a glycine-nitrate solution combustion method. The results of Fourier transform infrared spectra (FTIR) showed that the -OH groups residing on the nanoparticles surfaces were reduced effectively by modifying with capping agent. The modified Y<inf>2</inf>O<inf>3</inf>:Nd nanoparticles displayed good monodispersity and excellent luminescence in N,N-dimethylformamide (DMF) solvent. Some optical parameters were calculated by Judd-Ofelt analysis based on absorption and fluorescence spectra. A relative large stimulated emission cross section, 1.7&times;10<sup>-20</sup> cm<sup>2</sup>, of the <sup>4</sup>F <inf>3/2</inf>&rarr;<sup>4</sup>I<inf>11/2</inf> transition was calculated. Theses results show that the modified Y<inf>2</inf>O<inf>3</inf>:Nd nanoparticles display good luminescence behavior in organic media. &copy; 2010 Springer-Verlag.

Number of references:24

Main heading:Nanoparticles

Controlled terms:Amino acids - Dimethylformamide - Fourier transforms - Luminescence - Neodymium - Organic solvents - Spectroscopy - Yttrium - Yttrium oxide

Uncontrolled terms:Absorption and fluorescence spectra - Capping agent - Cubic phase - Fourier transform infrared spectra - FTIR - Glycine nitrates - Judd-Ofelt analysis - Luminescence properties - Monodispersity - N ,N-Dimethylformamide  - OH group - Optical parameter - Organic media - Oxide nanoparticles - Stimulated emission cross section

Classification code:933 Solid State Physics - 921.3 Mathematical Transformations - 804.1 Organic Compounds - 801 Chemistry - 761 Nanotechnology - 741.1 Light/Optics - 708 Electric and Magnetic Materials - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 547.2 Rare Earth Metals

DOI:10.1007/s00339-010-6015-3

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 45>

 

Accession number:20113914373355

Title:The extracting system design of small dim targets in complex background

Authors:Liang, Dong Sheng (1); Liu, Hui (1); Liu, Wen (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) Graduate University of Chinese Academy of Sciences, Beijing 100039, China

Corresponding author:Liang, D.S.(dongshengstar@126.com)

Source title:Advanced Materials Research

Abbreviated source title:Adv. Mater. Res.

Volume:328-330

Monograph title:Mechatronics and Materials Processing I

Issue date:2011

Publication year:2011

Pages:2324-2327

Language:English

ISSN:10226680

ISBN-13:9783037852385

Document type:Conference article (CA)

Conference name:2011 International Conference on Mechatronics and Materials Processing, ICMMP 2011

Conference date:November 18, 2011 - November 20, 2011

Conference location:Guangzhou, China

Conference code:86635

Sponsor:Guangzhou University

Publisher:Trans Tech Publications, P.O. Box 1254, Clausthal-Zellerfeld, D-38670, Germany

Abstract:For the moving small dim targets in visible image sequences with low SNR and complex background, whose contained characters are simple and poor, they are extracted difficultly. This paper proposes a new method to detect and extract positions of small dim moving targets. According to the features of moving targets, in a very short time interval, the target trajectory is considered as a straight line approximately. Firstly, it makes use of threshold segmentation methods to extract the positions of targets in each frame, then building the motion line equations after the joint of multi-frame processing results. Finally, the position of small dim targets are detected out and extracted, and false targets are eliminated accurately. Hardware system was designed and the algorithm is implemented on hardware systems successfully. The experiment results show related functions of the system and extracting algorithm is feasible, the system is stable and has a strong process ability, which can effectively detect and extract small and dim target in complex background correctly. &copy; 2011 Trans Tech Publications.

Number of references:5

Main heading:Mechatronics

Controlled terms:Algorithms - Equations of motion - Image processing - Systems analysis - Target tracking

Uncontrolled terms:Complex background - Dim target - Extracting algorithm - False targets - Hardware design - Hardware system - Low SNR - Moving targets - Multi-frame - Related functions  - Short time intervals - Target trajectory - Threshold segmentation - Visible image

Classification code:961 Systems Science - 921.2 Calculus - 921 Mathematics - 741 Light, Optics and Optical Devices - 723 Computer Software, Data Handling and Applications - 716.2 Radar Systems and Equipment - 608 Mechanical Engineering, General

DOI:10.4028/www.scientific.net/AMR.328-330.2324

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 46>

 

Accession number:20112814137355

Title:Advance in imaging spectropolarimeter

Authors:Wang, Xin-Quan (1); Xiangli, Bin (2); Huang, Min (2); Hu, Liang (1); Zhou, Jin-Song (2); Jing, Juan-Juan (1)

Author affiliation:(1) Laboratory of Spectral Imaging Technique, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) Academy of Opto-Electronics, Chinese Academy of Sciences, Beijing 100094, China; (3) Graduate University of Chinese Academy of Sciences, Beijing 100049, China

Corresponding author:Wang, X.-Q.(wangxinquan@opt.ac.cn)

Source title:Guang Pu Xue Yu Guang Pu Fen Xi/Spectroscopy and Spectral Analysis

Abbreviated source title:Guang Pu Xue Yu Guang Pu Fen Xi

Volume:31

Issue:7

Issue date:July 2011

Publication year:2011

Pages:1968-1974

Language:Chinese

ISSN:10000593

CODEN:GYGFED

Document type:Journal article (JA)

Publisher:Science Press, 18,Shuangqing Street,Haidian, Beijing, 100085, China

Abstract:Imaging spectropolarimeter (ISP) is a type of novel photoelectric sensor which integrated the functions of imaging, spectrometry and polarimetry. In the present paper, the concept of the ISP is introduced, and the advances in ISP at home and abroad in recent years is reviewed. The principles of ISPs based on novel devices, such as acousto-optic tunable filter (AOTF) and liquid crystal tunable filter (LCTF), are illustrated. In addition, the principles of ISPs developed by adding polarized components to the dispersing-type imaging spectrometer, spatially modulated Fourier transform imaging spectrometer, and computer tomography imaging spectrometer are introduced. Moreover, the trends of ISP are discussed too.

Number of references:52

Main heading:Spectrometry

Controlled terms:Fourier transforms - Liquid crystals - Polarimeters - Spectrometers

Uncontrolled terms:Acousto-optic tunable filters - Computer tomography - Fourier transform imaging spectrometers - Imaging Polarimeter - Imaging spectrometer - Imaging spectrometers - Liquid crystal tunable filter - Novel devices - Photoelectric sensors - Polarized components  - Spectropolarimeters

Classification code:801 Chemistry - 804 Chemical Products Generally - 921.3 Mathematical Transformations - 941.3 Optical Instruments

DOI:10.3964/j.issn.1000-0593(2011)07-1968-07

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 47>

 

Accession number:20140917383555

Title:Tunable nonlinear frequency conversion of bismuth-tellurite glass holey fiber

Authors:Ryasnyanskiy, Aleksandr (1); Lin, Aoxiang (1); Guintrand, Cyril (1); Biaggio, Ivan (1); Toulouse, Jean (1)

Author affiliation:(1) Center for Optical Technologies and Physics Department, Lehigh University, Bethlehem, PA 18015, United States; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences (CAS), Xi'an 710119, China

Corresponding author:Ryasnyanskiy, A.(alr309@lehigh.edu)

Source title:Optics InfoBase Conference Papers

Abbreviated source title:Opt.InfoBase Conf. Papers

Monograph title:Optical Fiber Communication Conference, OFC 2011

Issue date:2011

Publication year:2011

Language:English

E-ISSN:21622701

ISBN-13:9781557529060

Document type:Conference article (CA)

Conference name:Optical Fiber Communication Conference, OFC 2011

Conference date:March 6, 2011  -  March 10, 2011

Conference location:Los Angeles, CA, United states

Conference code:102732

Publisher:Optical Society of America, 2010 Massachusetts Ave, NW, Washington, DC, DC 20036-1023, United States

Abstract:We report on tunable parametric generation (PG) and third-harmonic generation (THG) in a 2.9-&mu;m core bismuth-tellurite holey glass fiber. The maximum conversion efficiency was measured to be 0.1% and 0.06% for PG and THG respectively. &copy; 2010 Optical Society of America.

Number of references:18

Main heading:Glass

Controlled terms:Harmonic generation - Holey fibers - Tellurium compounds

Uncontrolled terms:Nonlinear frequency conversion - Parametric generation - Third-harmonic generation

Classification code:751.1 Acoustic Waves - 804.1 Organic Compounds - 812.3 Glass - 951 Materials Science

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 48>

 

Accession number:20113014170676

Title:High average power, strictly all-fiber supercontinuum source with good beam quality

Authors:Hu, Xiaohong (1); Zhang, Wei (1); Yang, Zhi (1); Wang, Yishan (1); Zhao, Wei (1); Li, Xiaohui (1); Wang, Hushan (1); Li, Cheng (1); Shen, Deyuan (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 710119, China

Corresponding author:Wang, Y.(yshwang@opt.ac.cn)

Source title:Optics Letters

Abbreviated source title:Opt. Lett.

Volume:36

Issue:14

Issue date:July 15, 2011

Publication year:2011

Pages:2659-2661

Language:English

ISSN:01469592

E-ISSN:15394794

CODEN:OPLEDP

Document type:Journal article (JA)

Publisher:Optical Society of America, 2010 Massachusetts Ave, NW, Washington, DC, DC 20036-1023, United States

Abstract:A 1:05 &mu;m picosecond pulsed fiber master oscillator power amplifier system delivering an average power of over 100W was used to pump a 5m long commercially available photonic crystal fiber and a 49:8W supercontinuum spanning from around 500nm to above 1700nm was generated. Strictly single mode operation of the all-fiber supercontinuum source across the whole spectral range was verified through the quantitative measurement of the beam quality. &copy; 2011 Optical Society of America.

Number of references:10

Main heading:Photonic crystal fibers

Controlled terms:Fibers - Optical pumping - Photonic crystals - Power amplifiers

Uncontrolled terms:All fiber - Average power - Fiber master-oscillator - Good beam quality - High average power - Picoseconds - Quantitative measurement - Single mode operation - Spectral range - Supercontinuum  - Supercontinuum sources

Classification code:713.1 Amplifiers - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 812 Ceramics, Refractories and Glass - 817 Plastics and Other Polymers: Products and Applications - 951 Materials Science

DOI:10.1364/OL.36.002659

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 49>

 

Accession number:20114214432393

Title:Mathematical model of the laser frequency shift modulated by small signal low frequency current

Authors:Yan, Deke (1); Zhong, Zhen (3); 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 710119, China; (2) Graduate University of the Chinese Academy of Sciences, Beijing 100049, China; (3) Institute of Optical Communication Engineering, Nanjing University, Nanjing 210093, China

Corresponding author:Yan, D.(yandeke@opt.ac.cn)

Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering

Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.

Volume:40

Issue:8

Issue date:August 2011

Publication year:2011

Pages:1465-1468

Language:Chinese

ISSN:10072276

Document type:Journal article (JA)

Publisher:Chinese Society of Astronautics, P.O. Box 225-32, Tianjin, 300192, China

Abstract:When laser transmits through the fiber, the more narrow of the laser spectral line width is, the more lower of the threshold for the stimulated Brillouin scattering is. High power laser tends to bring stimulated Brillouin scattering, thereby affecting the laser transmission. Modulating the high power laser diode by small signal current is one of the means for solving this problem. Effected by the sine small signal modulating current, the output laser of the distributed feedback semiconductor laser diode could produce frequency shift and broaden the spectral line width. Accordingly, it could increase the threshold of stimulated Brillouin scattering and reduce the transmission loss. It was shown that the mathematical expression for the laser frequency shift associated with modulating current's amplitude and frequency on the condition of sine small signal low frequency modulating current. Then, the relative electro-optical system was also designed for the experiment. And then, the parameters of the mathematical model were obtained by data fitting.

Number of references:9

Main heading:Semiconductor lasers

Controlled terms:Diodes - Frequency shift keying - High power lasers - Light polarization - Mathematical models - Optical systems - Scattering - Semiconductor diodes - Spectroscopy - Stimulated Brillouin scattering  - Ultrasonics

Uncontrolled terms:Data fittings - Distributed feedback semiconductor laser - Electro-optical systems - Frequency shift - High power laser diode - Laser frequency - Laser spectral lines - Laser transmission - Low frequency - Low-frequency currents  - Mathematical expressions - Modulating current - Small signal - Spectral line width - Transmission loss

Classification code:801 Chemistry - 753.1 Ultrasonic Waves - 744.1 Lasers, General - 741.3 Optical Devices and Systems - 921 Mathematics - 741.1 Light/Optics - 717 Optical Communication - 716 Telecommunication; Radar, Radio and Television - 714.2 Semiconductor Devices and Integrated Circuits - 718 Telephone Systems and Related Technologies; Line Communications

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

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Accession number:20113614296190

Title:Numerical simulation of terahertz generation and detection based on ultrafast photoconductive antennas

Authors:Chen, Long-Chao (1); Fan, Wen-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 710119, China

Corresponding author:Fan, W.-H.(fanwh@opt.ac.cn)

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8195

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2011: Terahertz Wave Technologies and Applications

Issue date:2011

Publication year:2011

Article number:1

Language:English

ISSN:0277786X

CODEN:PSISDG

ISBN-13:9780819488367

Document type:Conference article (CA)

Conference name:International Symposium on Photoelectronic Detection and Imaging 2011: Terahertz Wave Technologies and Applications

Conference date:May 24, 2011 - May 26, 2011

Conference location:Beijing, China

Conference code:86295

Sponsor:Chinese Society of Astronautics (CAS)

Publisher:SPIE, P.O. Box 10, Bellingham, WA 98227-0010, United States

Abstract:The numerical simulation of terahertz generation and detection in the interaction between femtosecond laser pulse and photoconductive material has been reported in this paper. The simulation model based on the Drude-Lorentz theory is used, and takes into account the phenomena that photo-generated electrons and holes are separated by the external bias field, which is screened by the space-charge field simultaneously. According to the numerical calculation, the terahertz time-domain waveforms and their Fourier-transformed spectra are presented under different conditions. The simulation results indicate that terahertz generation and detection properties of photoconductive antennas are largely influenced by three major factors, including photo-carriers' lifetime, laser pulse width and pump laser power. Finally, a simple model has been applied to simulate the detected terahertz pulses by photoconductive antennas with various photo-carriers' lifetimes, and the results show that the detected terahertz spectra are very different from the spectra radiated from the emitter. &copy; 2011 SPIE.

Number of references:23

Main heading:Terahertz wave detectors

Controlled terms:Antennas - Computer simulation - Laser applications - Microwave antennas - Optical pumping - Photoconductivity - Terahertz waves - Time domain analysis - Ultrafast lasers - Ultrashort pulses

Uncontrolled terms:Bias field - Femtosecond laser pulse - Laser pulse width - Major factors - Numerical calculation - Photo-carriers - Photocarrier - Photoconductive antennas - Photoconductive materials - Photogenerated electrons  - Pump laser - Simulation model - Simulation result - Space charge field - Space-charge screening - Tera Hertz - Terahertz generation - Terahertz pulse - Terahertz spectra - Time-domain waveforms  - Ultra-fast

Classification code:744.9 Laser Applications - 744.1 Lasers, General - 741.1 Light/Optics - 921 Mathematics - 732.2 Control Instrumentation - 716 Telecommunication; Radar, Radio and Television - 711 Electromagnetic Waves - 723.5 Computer Applications

DOI:10.1117/12.900319

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

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Accession number:20122715188610

Title:Target-oriented shape modeling with structure constraint for image segmentation

Authors:Zhang, Wuxia (1); Yuan, Yuan (1); Li, Xuelong (1); Yan, Pingkun (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 710119, Shaanxi, China; (2) Graduate University of the Chinese Academy of Science, 19A Yuquanlu, Beijing, 100049, China

Corresponding author:Zhang, W.

Source title:1st Asian Conference on Pattern Recognition, ACPR 2011

Abbreviated source title:Asian Conf. Pattern Recogn., ACPR

Monograph title:1st Asian Conference on Pattern Recognition, ACPR 2011

Issue date:2011

Publication year:2011

Pages:194-198

Article number:6166707

Language:English

ISBN-13:9781457701221

Document type:Conference article (CA)

Conference name:1st Asian Conference on Pattern Recognition, ACPR 2011

Conference date:November 28, 2011 - November 28, 2011

Conference location:Beijing, China

Conference code:90727

Publisher:IEEE Computer Society, 445 Hoes Lane - P.O.Box 1331, Piscataway, NJ 08855-1331, United States

Abstract:Image segmentation plays a critical role in medical imaging applications, whereas it is still a challenging problem due to the complex shapes and complicated texture of structures in medical images. Model based methods have been widely used for medical image segmentation as a priori knowledge can be incorporated. Accurate shape prior estimation is one of the major factors affecting the accuracy of model based segmentation methods. This paper proposes a novel statistical shape modeling method, which aims to estimate target-oriented shape prior by applying the constraint from the intrinsic structure of the training shape set. The proposed shape modeling method is incorporated into a deformable model based framework for image segmentation. The experimental results showed that the proposed method can achieve more accurate segmentation compared with other existing methods. &copy; 2011 IEEE.

Number of references:12

Main heading:Image segmentation

Controlled terms:Medical image processing - Pattern recognition

Uncontrolled terms:Complex shapes - Deformable models - Imaging applications - Intrinsic structures - Major factors - Manifold Assumption - Manifold learning - Medical image segmentation - Medical images - Model-based method  - Model-based segmentation - Priori knowledge - Shape modeling - Shape priors - Shape set - Statistical shapes - Structure constraints

Classification code:716 Telecommunication; Radar, Radio and Television - 723.2 Data Processing and Image Processing

DOI:10.1109/ACPR.2011.6166707

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

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Accession number:20112814124861

Title:Design of collective optic system for Thomson scattering measurements on Shenguang-III facility

Authors:Yan, Yadong (1); Lu, Weitao (1); Dong, Xiaona (1); He, Junhua (1); Liu, Xizhan (1); Zhang, Min (1); Zhang, Pengshun (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, Shaanxi 710119, China; (2) Graduate University of the Chinese Academy of Sciences, Beijing 100049, China

Corresponding author:Yan, Y.(yyd@opt.ac.cn)

Source title:Guangxue Xuebao/Acta Optica Sinica

Abbreviated source title:Guangxue Xuebao

Volume:31

Issue:6

Issue date:June 2011

Publication year:2011

Article number:0611002

Language:Chinese

ISSN:02532239

CODEN:GUXUDC

Document type:Journal article (JA)

Publisher:Chinese Optical Society, P.O. Box 80, Xi'an, 710068, China

Abstract:A Thomson scattering signal collective optic system is designed for Thomson scattering measurements on Shenguang-III facility. The optical system is composed of two coupled Cassegrain systems, and has an intermediate image plane. This configuration makes the optical path length long enough to transmit the scattering signal to the camera outside the target chamber. The catadioptric system makes it easier to balance chromatic aberration as there are few ultraviolet materials available. The corrector lens which has a long focal length is replaced by two faster corrector lenses, which make the fabrications and measurements easier. The obscuration ratio is reduced by choosing a proper intermediate magnification. The two refraction lenses beside the intermediate image plane help to couple the two systems well. A reticle is set at the intermediate image plane for system aiming and can be removed before event recording. This system has the total length of more than 5 m, with the maximal elements diameter of 190 mm. The field of view is 2 mm, the magnification is 1.5, and the object space F-number is 10, and the resolution is better than 20&mu;m.

Number of references:22

Main heading:Aberrations

Controlled terms:Image recording - Imaging systems - Light scattering - Optical systems - Scattering - Systems analysis

Uncontrolled terms:Cassegrain - Chromatic aberration - Field of views - Focal lengths - Intermediate image - Maximal elements - Object space - Obscuration ratio - Optic system - Optical path lengths  - Optical system designs - Scattering signals - Target chambers - Thomson scattering - Total length

Classification code:741 Light, Optics and Optical Devices - 746 Imaging Techniques - 961 Systems Science

DOI:10.3788/AOS201131.0611002

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

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Accession number:20113814357572

Title:Two dimensional principal components of natural images and its application

Authors:Wang, Dong (1); Lu, Huchuan (1); Li, Xuelong (1)

Author affiliation:(1) School of Information and Communication Engineering, Dalian University of Technology, China; (2) Xi'an Institute of Optics and Precision Mechanics Of CAS, China

Corresponding author:Lu, H.(lhchuan@dlut.edu.cn)

Source title:Neurocomputing

Abbreviated source title:Neurocomputing

Volume:74

Issue:17

Issue date:October 2011

Publication year:2011

Pages:2745-2753

Language:English

ISSN:09252312

E-ISSN:18728286

CODEN:NRCGEO

Document type:Journal article (JA)

Publisher:Elsevier, P.O. Box 211, Amsterdam, 1000 AE, Netherlands

Abstract:In this paper, two dimensional principal components of natural images (2D-PCs) are proposed. Similar to principal components of natural images (1D-PCs), 2D-PCs can also be viewed as fundamental components of human's receptive field because they contain edge-like, bar-like and grating-like patterns. However, compared to 1D-PCs, 2D-PCs are of surprising symmetry, stable regularity, good interpretability, and have little computational complexity in real applications. Then, based on 1D-PCs and 2D-PCs, we design two kinds of statistical texture features (STF(1D) and STF(2D)), and apply them to multi-class facial expression recognition. Numerous experimental results demonstrate that our statistical texture features are better or not worse than other popular features for facial expression recognition. &copy; 2011 Elsevier B.V.

Number of references:29

Main heading:Face recognition

Controlled terms:Computational complexity - Feature extraction - Gesture recognition - Textures - Two dimensional

Uncontrolled terms:2DPCA - Facial expression recognition - Fundamental component - Interpretability - Multi-class - Natural images - PCA - Principal Components - Real applications - Receptive fields  - Texture features

Classification code:716 Telecommunication; Radar, Radio and Television - 721.1 Computer Theory, Includes Formal Logic, Automata Theory, Switching Theory, Programming Theory - 902.1 Engineering Graphics - 933 Solid State Physics

DOI:10.1016/j.neucom.2011.03.047

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

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Accession number:20113714317115

Title:Nanoplasmonic triple-wavelength demultiplexers in two-dimensional metallic waveguides

Authors:Lu, H. (1); Liu, X.M. (1); Wang, L.R. (1); Mao, D. (1); Gong, Y.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 710119, China

Corresponding author:Liu, X.M.(liuxueming72@yahoo.com)

Source title:Applied Physics B: Lasers and Optics

Abbreviated source title:Appl Phys B

Volume:103

Issue:4

Issue date:June 2011

Publication year:2011

Pages:877-881

Language:English

ISSN:09462171

CODEN:APBOEM

Document type:Journal article (JA)

Publisher:Springer Verlag, Tiergartenstrasse 17, Heidelberg, D-69121, Germany

Abstract:A novel kind of plasmonic wavelength demultiplexers (WDMs) based on two-dimensional metal-insulator-metal waveguides with side coupled nanocavities (SC-NCs) is proposed and numerically investigated. The WDMs contain three waveguide output channels, each of which functions as a dual-stopband plasmonic filter. The demultiplexing wavelengths can be tuned by controlling the lengths and widths of SCNCs. The finite-difference time-domain results can be accurately analyzed by the resonant theory of nanocavity. Our structures have important potential applications for design of WDM systems in highly integrated optical circuits. &copy; Springer-Verlag 2011.

Number of references:33

Main heading:Two dimensional

Controlled terms:Demultiplexing - Finite difference time domain method - Metal insulator boundaries - Photonic integration technology - Plasmons - Waveguides

Uncontrolled terms:Demultiplexers - Dual stopband - Finite difference time domains - Highly integrated - Metal insulator metals - Metallic waveguide - Nano-cavities - Output channels - Plasmonic - Potential applications  - Triple wavelengths - Wavelength demultiplexers - WDM systems

Classification code:902.1 Engineering Graphics - 718 Telephone Systems and Related Technologies; Line Communications - 717 Optical Communication - 921 Mathematics - 716 Telecommunication; Radar, Radio and Television - 714.2 Semiconductor Devices and Integrated Circuits - 712.1 Semiconducting Materials - 714.3 Waveguides

DOI:10.1007/s00340-011-4525-0

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

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Accession number:20112013983312

Title:Preparation of a new type of high-resolution light source

Authors:Dou, X.B. (1); Chen, X. (1); Bi, S.W. (1); Liu, W.Y. (1); Chen, M.R. (1); Chen, 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 710119, China; (2) Graduate School, Chinese Academy of Science, Beijing 10049, China; (3) Department of Physics, Northwest University, Xi'an 710069, China

Corresponding author:Dou, X. B.(douxibo@163.com)

Source title:Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Abbreviated source title:Nucl Instrum Methods Phys Res Sect A

Volume:637

Issue:1 SUPPL.

Issue date:May 1, 2011

Publication year:2011

Pages:S134-S136

Language:English

ISSN:01689002

CODEN:NIMAER

Document type:Conference article (CA)

Publisher:Elsevier, P.O. Box 211, Amsterdam, 1000 AE, Netherlands

Abstract:The generation of a new type of high-resolution non-classical light source with a wavelength of 1064 nm is demonstrated experimentally. A periodically poled KTiOPO<inf>4</inf> (PPKTP) crystal is installed in a continuous-wave optical parametric amplifier (OPA), which is pumped by a 532 nm laser and seeded by a weak 1064 nm laser. The optical parametric down-conversion process is activated in the OPA and generates a non-classical optical field at a wavelength of 1064 nm. The partial squeezed spectrum is pre-detected by a homodyne detection setup. The experiment demonstrates that the resolution of the non-classical optical field is 1.43 times that of the classical optical field. &copy; 2010 Elsevier B.V. All rights reserved.

Number of references:13

Main heading:Light sources

Controlled terms:Light amplifiers - Microwave amplifiers - Optical frequency conversion - Optical parametric oscillators - Parametric amplifiers - Pumping (laser)

Uncontrolled terms:1064 nm - 1064 nm lasers - 532 nm laser - Continuous waves - High resolution - Homodyne detection - Non-classical lights - Optical field - Optical parametric amplifiers - Parametric down-conversion process  - Periodically poled

Classification code:713.1 Amplifiers - 713.2 Oscillators - 741.1.1 Nonlinear Optics - 741.3 Optical Devices and Systems - 744 Lasers

DOI:10.1016/j.nima.2010.02.040

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

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Accession number:20112013983317

Title:Theoretical study and experimental scheme for the generation of a 1064-nm continuous variable entangled light source with quasi-phase-matching PPKTP crystal

Authors:Liu, W.Y. (1); Bi, S.W. (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 710119, China

Corresponding author:Liu, W. Y.(liu02401073@sina.com)

Source title:Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Abbreviated source title:Nucl Instrum Methods Phys Res Sect A

Volume:637

Issue:1 SUPPL.

Issue date:May 1, 2011

Publication year:2011

Pages:S153-S157

Language:English

ISSN:01689002

CODEN:NIMAER

Document type:Conference article (CA)

Publisher:Elsevier, P.O. Box 211, Amsterdam, 1000 AE, Netherlands

Abstract:Beginning from Maxwell's equations, various factors required for the non-degenerate optical parametric amplifier (NOPA) to operate are considered step by step. Analytic expressions are obtained, generated from the experimental parameters and through the numerical simulation of the quantum-correlated spectrum between the signal and the idler modes from the NOPA operating below threshold. On this basis, an experimental program is designed for the generation of a 1064-nm continuous variable entanglement light source with a quasi-phase-matching periodical polarized KTiOPO<inf>4</inf> (PPKTP) crystal through a below-threshold optical parametric down-conversion process. This will play a crucial role in subsequent experiments. &copy; 2010 Elsevier B.V. All rights reserved.

Number of references:19

Main heading:Phase matching

Controlled terms:Light amplifiers - Light sources - Maxwell equations - Microwave amplifiers - Parametric amplifiers

Uncontrolled terms:Analytic expressions - Continuous variable entanglement light source - Continuous variables - Experimental parameters - Experimental program - Experimental scheme - Maxwell's equations - Numerical simulation - Optical parametric amplifiers - Parametric down-conversion process  - PPKTP crystal - Quasi phase matching - Step-by-step - Theoretical study

Classification code:713 Electronic Circuits - 713.1 Amplifiers - 744 Lasers - 744.1 Lasers, General - 921.2 Calculus

DOI:10.1016/j.nima.2010.02.045

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

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Accession number:20114014386461

Title:The hybrid refractive-diffractive optical system design of preposition of aperture LWIR

Authors:Liu, Kai (1); Chen, Rongli (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, CAS, Xi'an, Shaanxi 710119, China; (2) Graduate School, CAS, Beijing, 100039, China

Corresponding author:Liu, K.(sg-lika@163.com)

Source title:ICEOE 2011 - 2011 International Conference on Electronics and Optoelectronics, Proceedings

Abbreviated source title:ICEOE - Int. Conf. Electron. Optoelectron., Proc.

Volume:3

Monograph title:ICEOE 2011 - 2011 International Conference on Electronics and Optoelectronics, Proceedings

Issue date:2011

Publication year:2011

Pages:V3231-V3234

Article number:6013346

Language:English

ISBN-13:9781612842738

Document type:Conference article (CA)

Conference name:2011 International Conference on Electronics and Optoelectronics, ICEOE 2011

Conference date:July 29, 2011 - July 31, 2011

Conference location:Dalian, China

Conference code:86661

Publisher:IEEE Computer Society, 445 Hoes Lane - P.O.Box 1331, Piscataway, NJ 08855-1331, United States

Abstract:The LWIR (Long Wave Infrared) used for observation heat. The influence of background radiation caused the sensitivity of the system decreased. The article uses subzero refrigeration detector, and require the efficiency of luminescence railing reaching 100%. The paper deduce the design formula of preposition of aperture LWIR, and the wave band 10&sim;12&mu;m, diameter 50mm, F/2, field 8.2<sup>0</sup>&times;8.2<sup>0</sup>. This paper based on the principle of binary diffractive optical elements, the unique dispersion properties have the incomparable advantage compared with traditional optical components in calibration system. Design results show that the hybrid refractive-diffractive Optical System compared with the traditional infrared optical system, not only use the fewer optical elements, and achieve the purpose of the lightweight, and the system performance also have significantly improved. &copy; 2011 IEEE.

Number of references:8

Main heading:Optical systems

Controlled terms:Diffractive optics - Infrared radiation - Optical design - Optics - Optoelectronic devices - Systems analysis

Uncontrolled terms:Background radiation - Calibration system - Design formulae - Dispersion properties - Infrared optical systems - infrared system - Long wave infrared - Optical components - Wavebands

Classification code:741.1 Light/Optics - 741.3 Optical Devices and Systems - 961 Systems Science

DOI:10.1109/ICEOE.2011.6013346

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

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Accession number:20113114199258

Title:808 nm CW 2000 W semiconductor laser vertical stack

Authors:Zhang, Entao (1); Zhang, Yanxin (1); Xiong, Lingling (1); Wang, Jingwei (1); Kang, Lijun (2); Yang, Kai (2); Wu, Di (2); Yuan, Zhenbang (2); Dai, Huabin (2); Liu, Xingsheng (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, Xi'an 710119, China; (2) Xi'an Focuslight Optoelectronics Technology Co., Ltd., Xi'an 710119, China

Corresponding author:Zhang, E.(Entaozhang@163.com)

Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering

Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.

Volume:40

Issue:6

Issue date:June 2011

Publication year:2011

Pages:1075-1080

Language:Chinese

ISSN:10072276

Document type:Journal article (JA)

Publisher:Chinese Society of Astronautics, P.O. Box 225-32, Tianjin, 300192, China

Abstract:In order to promote the performance and power of high-power semiconductor lasers, double-faced thermal conduction technology was used, thermal design and packaging design were theoretically analyzed and optimized, which greatly improved the power of micro-channel water cooled vertical stack and single bar semiconductor lasers. The power of 808 nm 20 bars vertical stack semiconductor laser reaches 2000 W under the continuous wave (CW) condition, the average power of each bar reaches 100 W. The experimental data of LIV character, spectrum character, facula and smile of near field, the spreading angle and direction of semiconductor laser were obtained which showed the excellent performance of this semiconductor lasers. Also the life-time test experiment was carried out and the result shows the good performance. The high-power semiconductor lasers will be used in many application fields.

Number of references:8

Main heading:Semiconductor lasers

Controlled terms:Chip scale packages - Continuous wave lasers - High power lasers - Power electronics

Uncontrolled terms:Application fields - Average power - Continuous waves - Excellent performance - Experimental data - High power semiconductor laser - Life-times - Micro-channel water cooled - Near fields - Packaging designs  - Spreading angle - Thermal conduction - Thermal designs - Vertical stacks

Classification code:714.2 Semiconductor Devices and Integrated Circuits - 715.2 Industrial Electronic Equipment - 744.1 Lasers, General

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

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Accession number:20112714112344

Title:Infrared automatic capture technology on shipborne photoelectric tracking system

Authors:Qiao, Yongming (1); Hao, Wei (1); Tian, Guangyuan (1); Han, Junfeng (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Qiao, Y.(qym@opt.ac.cn)

Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering

Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.

Volume:40

Issue:4

Issue date:April 2011

Publication year:2011

Pages:585-588+630

Language:Chinese

ISSN:10072276

Document type:Journal article (JA)

Publisher:Chinese Society of Astronautics, P.O. Box 225-32, Tianjin, 300192, China

Abstract:Aiming at the characteristics of shipborne photoelectric tracking system that works under mobile pedestal and complicated sea background, a method of using a mathematics platform for line of sight (LOS) stabilization was proposed. Using strapdown inertial navigation system (SINS) and offset staff adjustment on line, the zero steady-state angle error of LOS dynamic collimation was realized when there was no infrared tracking feedback. Moreover, the interference of complicated sea background has been restrained by designating an infrared image area based on prior knowledge and the capability and stability of automatic capture based mobile pedestal have been enhanced. Now, this system is placed at a small warship of which dead weight is only 700 tons, then the probability of independent capture is more than 95% under four-grate sea condition.

Number of references:8

Main heading:Navigation

Controlled terms:Inertial navigation systems - Infrared imaging - Photoelectricity - Stabilization - State feedback - Tracking (position) - Warships

Uncontrolled terms:Area-based - Dynamic collimation - Infrared images - Line of Sight - Prior knowledge - Shipborne - Steady-state angle - Strap-down inertial navigation systems - Tracking system

Classification code:951 Materials Science - 746 Imaging Techniques - 741.1 Light/Optics - 731.1 Control Systems - 716.2 Radar Systems and Equipment - 431.5 Air Navigation and Traffic Control - 404.1 Military Engineering

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

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Accession number:20114814570320

Title:Stray light removing design and simulation of the three-mirror optical system used in field bias

Authors:Yan, Peipei (1); Fan, Xuewu (1); Zou, Gangyi (1); Yang, Lihua (1); He, Jianwei (1)

Author affiliation:(1) Space Optics Laboratory, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) Graduate University of the Chinese Academy of Sciences, Beijing 100049, China

Corresponding author:Yan, P.(yppoptics@163.com)

Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering

Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.

Volume:40

Issue:10

Issue date:October 2011

Publication year:2011

Pages:1997-2002

Language:Chinese

ISSN:10072276

Document type:Journal article (JA)

Publisher:Chinese Society of Astronautics, P.O. Box 225-32, Tianjin, 300192, China

Abstract:The stray light properties of the three-mirror optical system used in field bias was analyzed and the basic design principles of the light shade and baffle vanes were presented, then the design of them was discussed. The principles of stray light eliminating and evaluation using computer simulation technology were put forward. Considering that the system had a special rectangular field of view, and the field was off-axis in y direction, a certain demand on the external lens hood was proposed. So boxshaped outer wall combined with the cone-shaped wall was designed. The window shades were designed to be square and laid gradient by CAD modeling. Then, the system model was built in the Tracepro stray light analysis software with wavelength &lambda;=0.25&mu;m in which the light was traced according to the sixteen off-axis angles between 0.5 and 80, at the azimuth angles of 0&deg; and 90&deg;. Finally the PST curves were given through the calculation. It shows that the PST curves are going down in general and reach 10<sup>-8</sup> at off-axis angles of 25&deg;. The coefficient of the stray light is 3.59%. It proves the feasibility of design of the stray light eliminating and the further application can be carried out.

Number of references:9

Main heading:Stray light

Controlled terms:Computer simulation - Design - Mirrors - Optical systems - Walls (structural partitions)

Uncontrolled terms:Azimuth angles - Baffle vane - CAD modeling - Computer simulation technology - Design and simulation - Design Principles - External light shade - Field of views - In-field - Light properties  - Off-axis - Off-axis angles - PST - System models - Three-mirror optical systemused in field bias - TracePro

Classification code:402 Buildings and Towers - 408 Structural Design - 723.5 Computer Applications - 741.1 Light/Optics - 741.3 Optical Devices and Systems

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

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Accession number:20114214430549

Title:Single- and dual-pulse oscillation in a passively Q-switched Nd:YAG microchip laser

Authors:Niu, Linquan (1); Gao, Cunxiao (1); Zhu, Shaolan (1); Sun, Chuandong (1); He, Haodong (1); Song, Zhiyuan (1); Tang, Weidong (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 710119, China

Corresponding author:Niu, L.

Source title:Optics Express

Abbreviated source title:Opt. Express

Volume:19

Issue:21

Issue date:October 10, 2011

Publication year:2011

Pages:20628-20633

Language:English

E-ISSN:10944087

Document type:Journal article (JA)

Publisher:Optical Society of America, 2010 Massachusetts Ave, NW, Washington, DC, DC 20036-1023, United States

Abstract:Experimental investigation of single and dual pulses in a passively Q-switched Nd:YAG microchip laser with a Cr<sup>4+</sup>:YAG saturable absorber has been reported. The dual pulses consist of a main and a satellite pulse with respective spectra, intensities, and durations. It is found that the preponderant oscillating mode gives birth to the main pulse, and the other oscillating mode corresponds to the satellite pulse. Our results demonstrate that the dual-pulse emission results from double-longitudinal-mode oscillation in high pump regime. &copy; 2011 Optical Society of America.

Number of references:28

Main heading:Optical pumping

Controlled terms:Microprocessor chips - Neodymium - Neodymium lasers - Q switching

Uncontrolled terms:Dual-pulses - Experimental investigations - Main pulse - Nd:YAG microchip lasers - Oscillating modes - Passively Q-switched - Saturable absorbers

Classification code:547.2 Rare Earth Metals - 721 Computer Circuits and Logic Elements - 722 Computer Systems and Equipment - 741.1 Light/Optics - 744.4 Solid State Lasers - 744.8 Laser Beam Interactions

DOI:10.1364/OE.19.020628

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 62>

 

Accession number:20113214216483

Title:Hyperspectral image compression technology research based on EZW

Authors:Wei, Jun-Xia (1); Xiangli, Bin (3); Duan, Xiao-Feng (1); Xu, Zhao-Hui (5); Xue, Li-Jun (1)

Author affiliation:(1) Key Laboratory of Spectral Imaging Technology of Chinese Academy of Sciences, Xi'an 710119, China; (2) Laboratory of Spectral Imaging Technology, Xi'an Institute of Optics and Precision Mechanics, Xi'an 710119, China; (3) Academy of Opto-Electronics, Chinese Acad. of Sci., Beijing 100190, China; (4) Graduate University of Chinese Acad. of Sci., Beijing 100049, China; (5) Laboratory of Photoelectricity Measure and Control Technology, Xi'an Institute of Optics and Precision Mechanics, Xi'an 710119, China

Corresponding author:Xiangli, B.(xiangli@opt.cn)

Source title:Guang Pu Xue Yu Guang Pu Fen Xi/Spectroscopy and Spectral Analysis

Abbreviated source title:Guang Pu Xue Yu Guang Pu Fen Xi

Volume:31

Issue:8

Issue date:August 2011

Publication year:2011

Pages:2283-2286

Language:Chinese

ISSN:10000593

CODEN:GYGFED

Document type:Journal article (JA)

Publisher:Science Press, 18,Shuangqing Street,Haidian, Beijing, 100085, China

Abstract:Along with the development of hyperspectral remote sensing technology, hyperspectral imaging technology has been applied in the aspect of aviation and spaceflight, which is different from multispectral imaging, and with the band width of nanoscale spectral imaging the target continuously, the image resolution is very high. However, with the increasing number of band, spectral data quantity will be more and more, and these data storage and transmission is the problem that the authors must face. Along with the development of wavelet compression technology, in field of image compression, many people adopted and improved EZW, the present paper used the method in hyperspectral spatial dimension compression, but does not involved the spectrum dimension compression. From hyperspectral image compression reconstruction results, whether from the peak signal-to-noise ratio (PSNR) and spectral curve or from the subjective comparison of source and reconstruction image, the effect is well. If the first compression of image from spectrum dimension is made, then compression on space dimension, the authors believe the effect will be better.

Number of references:11

Main heading:Technology

Controlled terms:Image compression - Image resolution - Remote sensing - Signal to noise ratio

Uncontrolled terms:Compression of images - Data storage - EZW - HyperSpectral - Hyperspectral image compression - Hyperspectral Imaging - Hyperspectral remote sensing technology - In-field - MSE - Multispectral imaging  - Nano scale - Peak signal-to-noise ratio - PSNR - Reconstruction image - Space dimensions - Spatial dimension - Spectral curves - Spectral data - Spectral imaging - Wavelet compression

Classification code:716.1 Information Theory and Signal Processing - 731.1 Control Systems - 741 Light, Optics and Optical Devices - 742 Cameras and Photography - 901 Engineering Profession

DOI:10.3964/j.issn.1000-0593(2011)08-2283-04

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 63>

 

Accession number:20114714540036

Title:Die bonding of single emitter semiconductor laser with nano-scale silver paste

Authors:Yan, Yi (1); Chen, Xu (1); Liu, XingSheng (2); Lu, Guo-Quan (4)

Author affiliation:(1) School of Chemical Engineering and Technology, Tianjin University, Tianjin, 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) Xi'an Focuslight Technologies Co., LTD, Xi'an, Shanxi, China; (4) Department of Material Science and Engineering, Virginia Tech., United States; (5) Tianjin Key Laboratory of Advanced Joining Technology, School of Material Science and Engineering, Tianjin University, Tianjin, China

Corresponding author:Chen, X.(xchen@tju.edu.cn)

Source title:ICEPT-HDP 2011 Proceedings - 2011 International Conference on Electronic Packaging Technology and High Density Packaging

Abbreviated source title:ICEPT-HDP Proc. - Int. Conf. Electron. Packag. Technol. High Density Packag.

Monograph title:ICEPT-HDP 2011 Proceedings - 2011 International Conference on Electronic Packaging Technology and High Density Packaging

Issue date:2011

Publication year:2011

Pages:1143-1147

Article number:6067029

Language:English

ISBN-13:9781457717680

Document type:Conference article (CA)

Conference name:2011 12th International Conference on Electronic Packaging Technology and High Density Packaging, ICEPT-HDP 2011

Conference date:August 8, 2011 - August 11, 2011

Conference location:Shanghai, China

Conference code:87399

Sponsor:Chinese Institute of Electronics; IEEE Compon., Packag., Manuf. Technol. Soc. (IEEE-CPMT)

Publisher:IEEE Computer Society, 445 Hoes Lane - P.O.Box 1331, Piscataway, NJ 08855-1331, United States

Abstract:One of the most important steps in the manufacturing of laser diodes is bonding the chip onto some sort of sub-mount that allows the laser to be handled, durable electrical connections to be made, and heat to be conducted away from the laser itself. The ability to conduct heat away from the laser is critical in keeping operating temperatures low, thus improving the laser's performance and its lifetime. In this study, it's the first time to use nano-scale silver paste as a die-attach material for die bonding the laser diodes. Numerous tests have been carried out to check the silver paste packaged laser's performance, including electrical properties, spectral properties, far-field characteristics, thermal rollover characteristics and so on. The test results show that as a new interconnecting material, nano-silver paste has the potential to eliminate the deficiencies of the existing solders. &copy; 2011 IEEE.

Number of references:10

Main heading:Semiconductor lasers

Controlled terms:Chip scale packages - Dies - Electric connectors - Electric properties - Manufacture - Nanotechnology - Packaging - Semiconductor diodes - Silver

Uncontrolled terms:Die bonding - Die-attach materials - Electrical connection - Far-field - Nano scale - Nano silver - Operating temperature - Silver pastes - Single emitter - Spectral properties  - Thermal rollover

Classification code:714.2 Semiconductor Devices and Integrated Circuits - 706.2 Electric Power Lines and Equipment - 701.1 Electricity: Basic Concepts and Phenomena - 694.1 Packaging, General - 603.2 Machine Tool Accessories - 547.1 Precious Metals - 537.1 Heat Treatment Processes

DOI:10.1109/ICEPT.2011.6067029

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 64>

 

Accession number:20113614296319

Title:Design of bipod flexures for space mirror

Authors:Chu, Chang-Bo (1); Li, Ying-Cai (1); Chai, Wen-Yi (1); Fan, Xue-Wu (1)

Author affiliation:(1) Lab of Space Optics, Xi'an Institute of Optics and Precision Mechanics, CAS, Xi'an 710119, China; (2) Graduate School, Chinese Academy of Sciences, Beijing 100039, China

Corresponding author:Chu, C.-B.

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8196

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2011: Space Exploration Technologies and Applications

Issue date:2011

Publication year:2011

Article number:819620

Language:English

ISSN:0277786X

CODEN:PSISDG

ISBN-13:9780819488374

Document type:Conference article (CA)

Conference name:International Symposium on Photoelectronic Detection and Imaging 2011: Space Exploration Technologies and Applications

Conference date:May 24, 2011 - May 26, 2011

Conference location:Beijing, China

Conference code:86296

Sponsor:Chinese Society of Astronautics (CAS)

Publisher:SPIE, P.O. Box 10, Bellingham, WA 98227-0010, United States

Abstract:Bipod flexures are used in many high-precision space mirror mount applications. The flexures are used to provide moment isolation for the mirror to minimize surface figure distortion resulting from mount assembly error or distortion of the mount temperature-change-induced. In this paper, we developed a bipod flexure for the Zerodur primary mirror with diameter 520 mm and thickness 70 mm. The characteristic of the bipod flexure is the two-strip flexure on the top and bottom of each leg. By those, the bending stress in mirror resulting from the mount assembly is remarkably reduced. Thanking to a semi-open structure with small mouth and big stomach in the back and a six parts symmetrical honeycomb structure for the primary mirror, using the FEA (Finite Element Analysis) method we analyze that how the axial and circumferential locations of the three bipod flexures impact mirror surface figure and gain the better result after optimization. In the design of the detail bipod flexures, thickness of the blade is analyzed and compared; also we achieve an optimization design. The two results demonstrate that the bipod flexures could keep the precision of the mirror surface figure under the load of external force and thermal constraints and meanwhile they could keep stability of structure. &copy; 2011 SPIE.

Number of references:2

Main heading:Mirrors

Controlled terms:Design - Finite element method - Honeycomb structures - Mountings - Optimization - Space research

Uncontrolled terms:Assembly error - Bending stress - Bipod flexure - Circumferential location - External force - High-precision - Mirror mount - Mirror surfaces - Optimization design - Primary mirrors  - Space mirror - Surface figure - Thermal constraints - Zerodur

Classification code:921.6 Numerical Methods - 921.5 Optimization Techniques - 741.3 Optical Devices and Systems - 656.2 Space Research - 601.2 Machine Components - 408.2 Structural Members and Shapes - 408 Structural Design

DOI:10.1117/12.902227

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 65>

 

Accession number:20112114001760

Title:Millijoule pulse energy picosecond fiber chirped-pulse amplification system

Authors:Yang, Zhi (1); Hu, Xiaohong (1); Wang, Yishan (1); Zhang, Wei (1); Zhao, Wei (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Acad. of Sci., Xi'an 710119, China; (2) Graduate University of the Chinese Acad. of Sci., Beijing 100049, China

Corresponding author:Yang, Z.(yz2422@163.com)

Source title:Chinese Optics Letters

Abbreviated source title:Chin. Opt. Lett.

Volume:9

Issue:4

Issue date:April 2011

Publication year:2011

Article number:041401

Language:English

ISSN:16717694

Document type:Journal article (JA)

Publisher:Science Press, 18,Shuangqing Street,Haidian, Beijing, 100085, China

Abstract:The efficient generation of a 1.17-mJ laser pulse with 360 ps duration using an ytterbium (Yb)-doped fiber amplifier chain seeded by a homemade mode-locked fiber laser is demonstrated experimentally. A specially designed figure-of-eight fiber laser acts as the seed source of a chirped-pulse amplification (CPA) system and generates mode-locked pulses with hundreds of picosecond widths. Two kinds of large-mode-area (LMA) double-clad Yb-doped fibers are employed to construct the pre-amplifier and main amplifier. All of the adopted instruments help avoid severe nonlinearity in fibers to raise sub-nanosecond pulse energy with acceptable signal-to-noise ratio (SNR). The output spectrum of this fiber-based CPA system shows that amplified spontaneous emission (ASE) is suppressed to better than 30 dB, and the onset of stimulated Raman scattering is excluded. &copy; 2011 Chinese Optics Letters.

Number of references:18

Main heading:Mode-locked fiber lasers

Controlled terms:Amplification - Fiber amplifiers - Fibers - Pulse amplifiers - Pulse generators - Signal to noise ratio - Ytterbium

Uncontrolled terms:Adopted instruments - Amplified spontaneous emissions - Chirped pulse amplifications - Chirped-pulse amplification system - Doped fiber amplifier - Double-clad - In-fiber - Main amplifiers - Millijoule pulse - Mode-locked pulse  - Output spectrum - Picoseconds - Pre-amplifiers - Seed source - Severe nonlinearity - Signal to noise - Sub-nanosecond pulse - Yb-doped fibers

Classification code:812 Ceramics, Refractories and Glass - 744.4 Solid State Lasers - 744.1 Lasers, General - 817 Plastics and Other Polymers: Products and Applications - 716.1 Information Theory and Signal Processing - 713.1 Amplifiers - 547.2 Rare Earth Metals - 713.4 Pulse Circuits

DOI:10.3788/COL201109.041401

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 66>

 

Accession number:20113914361921

Title:Face sketch-photo synthesis under multi-dictionary sparse representation framework

Authors:Wang, Nannan (1); Gao, Xinbo (1); Tao, Dacheng (2); Li, Xuelong (3)

Author affiliation:(1) School of Electronic Engineering, Xidian University, Xi'an, China; (2) Faculty of Engineering and Information Technology, University of Technology, Sydney, Australia; (3) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Center for OPTical Imagery Analysis and Learning (OPTIMAL), Xi'an, China

Corresponding author:Wang, N.(wangnannan006@126.com)

Source title:Proceedings - 6th International Conference on Image and Graphics, ICIG 2011

Abbreviated source title:Proc. - Int. Conf. Image Graph., ICIG

Monograph title:Proceedings - 6th International Conference on Image and Graphics, ICIG 2011

Issue date:2011

Publication year:2011

Pages:82-87

Article number:6005537

Language:English

ISBN-13:9780769545417

Document type:Conference article (CA)

Conference name:6th International Conference on Image and Graphics, ICIG 2011

Conference date:August 12, 2011 - August 15, 2011

Conference location:Hefei, Anhui, China

Conference code:86574

Sponsor:National Natural Science Foundation of China; Chinese Academy of Science; Microsoft Research Asia; Xian Institute of Optics and Precision Mechanics of CAS; Anhui Crearo Technology Co., Ltd

Publisher:IEEE Computer Society, 445 Hoes Lane - P.O.Box 1331, Piscataway, NJ 08855-1331, United States

Abstract:Sketch-photo synthesis is one of the important research issues of heterogeneous image transformation. Some available popular synthesis methods, like locally linear embedding (LLE), usually generate sketches or photos with lower definition and blurred details, which reduces the visual quality and the recognition rate across the heterogeneous images. In order to improve the quality of the synthesized images, a multi-dictionary sparse representation based face sketch-photo synthesis model is constructed. In the proposed model, LLE is used to estimate an initial sketch or photo, while the multi-dictionary sparse representation model is applied to generate the high frequency and detail information. Finally, by linear superimposing, the enhanced face sketch or photo can be obtained. Experimental results show that sketches and photos synthesized by the proposed method have higher definition and much richer detail information resulting in a higher face recognition rate between sketches and photos. &copy; 2011 IEEE.

Number of references:22

Main heading:Face recognition

Uncontrolled terms:Face recognition rates - High frequency - Image transformations - Locally linear embedding - Multi-dictionary - Recognition rates - Research issues - Sparse representation - Synthesis method - Synthesis models  - Synthesized images - Visual qualities

Classification code:716 Telecommunication; Radar, Radio and Television

DOI:10.1109/ICIG.2011.112

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 67>

 

Accession number:20112013983320

Title:Biased electric field analysis of a photoconductive antenna for terahertz generation

Authors:Yang, Jian (1); Fan, Wenhui (1); Xue, Bing (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 710119, Shaanxi, China

Corresponding author:Fan, W.(fanwh@opt.ac.cn)

Source title:Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Abbreviated source title:Nucl Instrum Methods Phys Res Sect A

Volume:637

Issue:1 SUPPL.

Issue date:May 1, 2011

Publication year:2011

Pages:S165-S167

Language:English

ISSN:01689002

CODEN:NIMAER

Document type:Conference article (CA)

Publisher:Elsevier, P.O. Box 211, Amsterdam, 1000 AE, Netherlands

Abstract:The development of terahertz (THz) science has been ongoing for decades. As such, the generation and detection of THz radiation tend to be advanced. Currently, there are two main approaches to detect THz radiation: free-space electro-optic sampling (FS-EOS) and photoconductive (PC) sampling. Among the generations, the photoconductive effect is significant in the amplitude of THz radiation, which is believed to be proportional to the magnitude of the inner electric field. In order to increase THz radiation by safely enhancing the biased electric field, simulations on the electric field distributions of several different antennas have been conducted during our research. As a result of comparing and analyzing the findings of the simulations, a specific antenna structure suitable for a much higher biased field has been designed. Furthermore, satisfactory THz radiation is expected from this antenna. &copy; 2010 Elsevier B.V. All rights reserved.

Number of references:4

Main heading:Terahertz waves

Controlled terms:Antennas - Electric field effects - Microwave antennas - Photoconductivity - Radiation

Uncontrolled terms:Antenna structures - Electric field analysis - Electric field distributions - Field distribution - Free-space electro-optic sampling - Photoconductive antennas - Photoconductive effect - Terahertz - Terahertz generation - THz radiation

Classification code:701.1 Electricity: Basic Concepts and Phenomena - 711 Electromagnetic Waves - 716 Telecommunication; Radar, Radio and Television

DOI:10.1016/j.nima.2010.02.048

Database:Compendex

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<RECORD 68>

 

Accession number:20114014403109

Title:Canonical signed digit encoding based optimal design for FIR filters

Authors:Yue, Qi (1); Ma, Caiwen (1); Wang, Xin (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanic, Chinese Academy of Sciences, Xi'an, China

Corresponding author:Yue, Q.(yueqi6@163.com)

Source title:Proceedings of 2011 International Conference on Electronic and Mechanical Engineering and Information Technology, EMEIT 2011

Abbreviated source title:Proc. Int. Conf. Electron. Mech. Eng. Inf. Technol., EMEIT

Volume:2

Monograph title:Proceedings of 2011 International Conference on Electronic and Mechanical Engineering and Information Technology, EMEIT 2011

Issue date:2011

Publication year:2011

Pages:729-732

Article number:6023152

Language:English

ISBN-13:9781612840857

Document type:Conference article (CA)

Conference name:2011 International Conference on Electronic and Mechanical Engineering and Information Technology, EMEIT 2011

Conference date:August 12, 2011 - August 14, 2011

Conference location:Harbin, China

Conference code:86793

Publisher:IEEE Computer Society, 445 Hoes Lane - P.O.Box 1331, Piscataway, NJ 08855-1331, United States

Abstract:Based on Particle Swarm Optimization (PSO) Algorithm and Canonical Signed Digit (CSD) encoding, an optimal design method for FIR filters is presented in order to reduce the pass-band ripple and power consumption of the integrated circuits. For the slow convergence and invalidate CSD encoding accompanying with the update and mutation operations in PSO, some solutions are given. Simulation results show that the pass-band ripple is reduced and faster convergence is obtained. Applied in the design of cascade filter, the proposed algorithm can greatly reduce the pass-band ripple. &copy; 2011 IEEE.

Number of references:7

Main heading:FIR filters

Controlled terms:Algorithms - Bandpass filters - Convergence of numerical methods - Design - Encoding (symbols) - Information technology - Mechanical engineering - Optimal systems - Particle swarm optimization (PSO)

Uncontrolled terms:Canonical signed digits - Faster convergence - Mutation operations - Optimal design - Optimal design methods - Particle Swarm Optimization Algorithm - Pass bands

Classification code:961 Systems Science - 921.6 Numerical Methods - 921 Mathematics - 903 Information Science - 723.2 Data Processing and Image Processing - 723 Computer Software, Data Handling and Applications - 703.2 Electric Filters - 608 Mechanical Engineering, General - 408 Structural Design

DOI:10.1109/EMEIT.2011.6023152

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 69>

 

Accession number:20111913972248

Title:A low power adaptive clock and data recovery circuit for wireless implantable systems

Authors:Yu, Hang (1); Li, Yan (1); Jiang, Lai (1); Ji, Zhen (1); Yan, Ping-Kun (2); Wang, Fei (3)

Author affiliation:(1) Shenzhen City Key Laboratory of Embedded System Design, College of Computer Science and Software Engineering, Shenzhen University, Shenzhen 518060, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (3) IBM Almaden Research Center, San Jose 95120, United States

Corresponding author:Ji, Z.(jizhen@szu.edu.cn)

Source title:Shenzhen Daxue Xuebao (Ligong Ban)/Journal of Shenzhen University Science and Engineering

Abbreviated source title:Shenzhen Daxue Xuebao (Ligong Ban)

Volume:28

Issue:2

Issue date:March 2011

Publication year:2011

Pages:143-146

Language:English

ISSN:10002618

CODEN:SDXLEX

Document type:Journal article (JA)

Publisher:Editorial Office of Journal of Shenzhen University, Shenzhen University, Shenzhen, 518060, China

Abstract:An extremely low power clock and data recovery circuit was designed for pulse position modulated input. Synchronized clock and data were recovered through converting the timing distance between pulses into voltage domain. The reference voltage required for data recovery was adaptively generated to extend the range of the input data rate. The design was validated using 0.25 &mu;m CMOS technology. With 45.5 kbits/s input data, the entire circuit only consumes less than 13 &mu;W of power.

Number of references:10

Main heading:Metal recovery

Controlled terms:Charge pump circuits - Clocks - CMOS integrated circuits - Design - Electric power supplies to apparatus - Input output programs - Integrated circuits - Jitter - Metallic compounds - MOS devices  - Optical pumping - Packet switching - Pulse modulation - Pulse position modulation - Pumps - Transistors

Uncontrolled terms:Charge pump - Clock and data recovery - CMOS technology - Complementary metal oxide semiconductor(CMOS) - Data recovery - Implantable system - Input datas - Low Power - Low power clock - Low-power design  - Pulse position modulated - Reference voltages - Synchronized clocks - Voltage domains

Classification code:943.3 Special Purpose Instruments - 804.1 Organic Compounds - 741.1 Light/Optics - 723.1 Computer Programming - 716 Telecommunication; Radar, Radio and Television - 715.2 Industrial Electronic Equipment - 714.2 Semiconductor Devices and Integrated Circuits - 703.1 Electric Networks - 618.2 Pumps - 531 Metallurgy and Metallography - 408 Structural Design

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 70>

 

Accession number:20115214632538

Title:Local learning-based image super-resolution

Authors:Lu, Xiaoqiang (1); Yuan, Haoliang (2); Yuan, Yuan (1); Yan, Pingkun (1); Li, Luoqing (2); Li, Xuelong (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 710119, Shaanxi, China; (2) Faculty of Mathematics and Computer Science, Hubei University, Wuhan 430062, Hubei, China

Corresponding author:Lu, X.

Source title:MMSP 2011 - IEEE International Workshop on Multimedia Signal Processing

Abbreviated source title:MMSP - IEEE Int. Workshop Multimedia Signal Process.

Monograph title:MMSP 2011 - IEEE International Workshop on Multimedia Signal Processing

Issue date:2011

Publication year:2011

Article number:6093843

Language:English

ISBN-13:9781457714337

Document type:Conference article (CA)

Conference name:3rd IEEE International Workshop on Multimedia Signal Processing, MMSP 2011

Conference date:November 17, 2011 - November 19, 2011

Conference location:Hangzhou, China

Conference code:87808

Sponsor:IEEE Signal Processing Society

Publisher:IEEE Computer Society, 445 Hoes Lane - P.O.Box 1331, Piscataway, NJ 08855-1331, United States

Abstract:Local learning algorithm has been widely used in single-frame super-resolution reconstruction algorithm, such as neighbor embedding algorithm [1] and locality preserving constraints algorithm [2]. Neighbor embedding algorithm is based on manifold assumption, which defines that the embedded neighbor patches are contained in a single manifold. While manifold assumption does not always hold. In this paper, we present a novel local learning-based image single-frame SR reconstruction algorithm with kernel ridge regression (KRR). Firstly, Gabor filter is adopted to extract texture information from low-resolution patches as the feature. Secondly, each input low-resolution feature patch utilizes K nearest neighbor algorithm to generate a local structure. Finally, KRR is employed to learn a map from input low-resolution (LR) feature patches to high-resolution (HR) feature patches in the corresponding local structure. Experimental results show the effectiveness of our method. &copy; 2011 IEEE.

Number of references:14

Main heading:Learning algorithms

Controlled terms:Image reconstruction - Multimedia signal processing - Optical resolving power - Regression analysis

Uncontrolled terms:Embedding algorithms - Gabor filter - High resolution - Image super-resolution - K nearest neighbor algorithm - Local structure - Reconstruction algorithms - Ridge regression - Super-resolution reconstruction - Texture information

Classification code:723 Computer Software, Data Handling and Applications - 723.5 Computer Applications - 741 Light, Optics and Optical Devices - 741.1 Light/Optics - 922.2 Mathematical Statistics

DOI:10.1109/MMSP.2011.6093843

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

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Accession number:20113614296242

Title:Image enhancement techniques used for THz imaging

Authors:Liang, Yuqing (1); Fan, Wenhui (1); Xue, Bing (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 710119, China

Corresponding author:Fan, W.(fanwh@opt.ac.cn)

Source title:Proceedings of SPIE - The International Society for Optical Engineering

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8195

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2011: Terahertz Wave Technologies and Applications

Issue date:2011

Publication year:2011

Article number:1

Language:English

ISSN:0277786X

CODEN:PSISDG

ISBN-13:9780819488367

Document type:Conference article (CA)

Conference name:International Symposium on Photoelectronic Detection and Imaging 2011: Terahertz Wave Technologies and Applications

Conference date:May 24, 2011 - May 26, 2011

Conference location:Beijing, China

Conference code:86295

Sponsor:Chinese Society of Astronautics (CAS)

Publisher:SPIE, P.O. Box 10, Bellingham, WA 98227-0010, United States

Abstract:Terahertz (THz) radiation has been widely applied in the areas of spectroscopy, sensing and imaging. With the advancement of THz technologies, THz imaging has been progressed significantly and has huge potential applications in medical diagnosis, environmental control, chemical and biological identification. In the past, people mainly focused on overcoming the obstacles in the hardware, such as the limitation of resolution, accuracy and speed in THz imaging system. In this paper, image enhancement techniques are employed to enhance the contrast and get the better profile of THz image. Our results clearly demonstrate that digital image processing techniques can suppress noise effectively, extract target edges robustly, and therefore improve the quality of THz image. &copy; 2011 SPIE.

Number of references:17

Main heading:Medical imaging

Controlled terms:Diagnosis - Digital image storage - Image enhancement - Imaging systems - Terahertz spectroscopy - Terahertz wave detectors - Terahertz waves

Uncontrolled terms:Biological identification - Digital image processing technique - Enhancement techniques - Environmental control - Potential applications - Sensing and imaging - Terahertz radiation - THz - THz imaging - THz technology

Classification code:931.1 Mechanics - 746 Imaging Techniques - 741.3 Optical Devices and Systems - 741 Light, Optics and Optical Devices - 732.2 Control Instrumentation - 711 Electromagnetic Waves - 461.6 Medicine and Pharmacology

DOI:10.1117/12.900775

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 72>

 

Accession number:20114414464782

Title:Application of SIFT feature extraction algorithm on the image registration

Authors:Liu, Jinxia (1); Qiu, Yuehong (1)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, CAS, Xi'an 710119, China

Corresponding author:Liu, J.(liu_jinxia@163.com)

Source title:Proceedings - IEEE 2011 10th International Conference on Electronic Measurement and Instruments, ICEMI 2011

Abbreviated source title:Proc. IEEE Int. Conf. Electron. Meas. Instruments, ICEMI

Volume:3

Monograph title:Proceedings - IEEE 2011 10th International Conference on Electronic Measurement and Instruments, ICEMI 2011

Issue date:2011

Publication year:2011

Pages:177-180

Article number:6037882

Language:English

ISBN-13:9781424481590

Document type:Conference article (CA)

Conference name:IEEE 2011 10th International Conference on Electronic Measurement and Instruments, ICEMI 2011

Conference date:August 16, 2011 - August 18, 2011

Conference location:Chengdu, China

Conference code:87064

Sponsor:IEEE Beijing Section; Chinese Institute of Electronics (CIE); National Natural Science Foundation of China; Computer Measurement Group

Publisher:IEEE Computer Society, 445 Hoes Lane - P.O.Box 1331, Piscataway, NJ 08855-1331, United States

Abstract:Presents a high-accuracy image registration technique using SIFT and BBF. Conventional techniques of SIFT-based image registration are not very effective when searching for homonymy point-pairs, and eliminating mismatching. This paper proposes a technique to improve registration performance by BBF and RANSAC algorithm, BBF algorithm searches optimal homonymy point-pairs, and RANSAC algorithm eliminates mismatching. Experiments with real-world scenes demonstrate that the proposed method can reach a better precision and robustness, which outperforms previously proposed schemes, and makes possible to estimate image displacement with 0.01 pixel accuracy. &copy; 2011 IEEE.

Number of references:9

Main heading:Image matching

Controlled terms:Algorithms - Feature extraction - Image registration

Uncontrolled terms:BBF - Conventional techniques - High-accuracy - Image registration techniques - Kd-tree - RANSAC - RANSAC algorithm - Registration performance - SIFT Feature - Subpixel registration

Classification code:716 Telecommunication; Radar, Radio and Television - 723 Computer Software, Data Handling and Applications - 723.2 Data Processing and Image Processing - 921 Mathematics

DOI:10.1109/ICEMI.2011.6037882

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 73>

 

Accession number:20113614310384

Title:Spectral characteristics of chirped fiber Bragg gratings in large-mode-area fibers

Authors:Zhao, Baoyin (1); Duan, Kailiang (1); Zhao, Wei (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 710119, China; (2) Graduate University of Chinese Academy of Sciences, Beijing 100049, China

Corresponding author:Zhao, B.(joseph.zhao@opt.ac.cn)

Source title:Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams

Abbreviated source title:Qiangjiguang Yu Lizishu

Volume:23

Issue:7

Issue date:July 2011

Publication year:2011

Pages:1794-1798

Language:English

ISSN:10014322

CODEN:QYLIEL

Document type:Journal article (JA)

Publisher:Editorial Office of High Power Laser and Particle Beams, P.O. Box 919-805, Mianyang, 621900, China

Abstract:A matrix method is extended to solve the multimode coupling differential equations, and thereby the spectral characteristics of the chirped Bragg gratings in large-mode-area fibers (LMA FBGs) are studied theoretically. Unlike those of Bragg gratings in single mode optical fibers (SM FBGs), the reflection spectra of chirped LMA FBGs contain self-coupling and co-coupling peaks of the existing modes. For the chirped LMA FBGs, the reflectivity decreases and the reflection peaks split. These splits can be improved on some degree by Gaussian apodization function.

Number of references:14

Main heading:Fiber Bragg gratings

Controlled terms:Differential equations - Fibers - Multimode fibers - Optical fiber coupling - Optical waveguides - Pulse amplifiers

Uncontrolled terms:Apodization function - Chirped Bragg grating - Chirped fiber Bragg grating - Chirped LMA FBG - Coupled mode theory - Gaussians - Large mode area fiber - Matrix methods - Multimode couplings - Reflection peaks  - Reflection spectra - Single-mode optical fiber - Spectral characteristics

Classification code:817 Plastics and Other Polymers: Products and Applications - 812 Ceramics, Refractories and Glass - 741.3 Optical Devices and Systems - 921.2 Calculus - 741.1.2 Fiber Optics - 717 Optical Communication - 713.1 Amplifiers - 717.2 Optical Communication Equipment

DOI:10.3788/HPLPB20112307.1794

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 74>

 

Accession number:20113214224372

Title:Optical image operation based on holographic polarization multiplexing of fulgide film

Authors:Wang, Yingli (1); Yao, Baoli (1); Menke, Neimule (1); Chen, Yi (2); Fan, Meigong (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 710119, China; (2) Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100101, China

Corresponding author:Wang, Y.(wangyl@opt.ac.cn)

Source title:Chinese Optics Letters

Abbreviated source title:Chin. Opt. Lett.

Volume:9

Issue:SUPPL. 1

Issue date:June 2011

Publication year:2011

Pages:S10302

Language:English

ISSN:16717694

Document type:Journal article (JA)

Publisher:Science Press, 18,Shuangqing Street,Haidian, Beijing, 100085, China

Abstract:Fulgide, a kind of thermally irreversible photochromic compound, can be used for polarization holographic recording owing to its photoinduced anisotropy and photochromic property under the irradiation of linear polarization light. In this letter, a new technique of optical image operation based on the polarization multiplexing scheme in the fulgide film is demonstrated, which can implement the readout of two individual orthogonal polarized images separately and the subtraction or summation of the two images by simply rotating a polarizer in front of the charge-coupled device (CCD) detector. &copy; 2011 Chinese Optics Letters.

Number of references:12

Main heading:Polarization

Controlled terms:Geometrical optics - Image recording - Multiplexing - Optical recording - Photochromism

Uncontrolled terms:Charge coupled device detectors - Fulgides - Holographic recordings - Linear polarization - Optical image - Photo-induced anisotropy - Photochromic compound - Photochromic properties - Polarization multiplexing

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

DOI:10.3788/COL201109.S10302

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 75>

 

Accession number:20134316893751

Title:Clock drift-tolerant optical bit pattern monitoring technique in asynchronous undersampling system

Authors:Zhang, Huixing (1); Zhao, Wei (1)

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, 710119, China; (2) Graduate School of Chinese Academy of Sciences, Beijing 100039, China

Source title:Optical Engineering

Abbreviated source title:Opt Eng

Volume:50

Issue:10

Issue date:2011

Publication year:2011

Article number:105008

Language:English

ISSN:00913286

E-ISSN:15602303

CODEN:OPEGAR

Document type:Journal article (JA)

Publisher:SPIE, P.O. Box 10, Bellingham, WA 98227-0010, United States

Abstract:Based on an asynchronously undersampling system, we present a novel bit pattern monitoring technique in terms of its performance analysis and the implementation aspects. Relying upon an finite impulse response (FIR) filter assisted fine synchronization of the acquired samples, the technique can significantly reduce the random walk clock drift between data signal and sampling source compared to a conventional fine synchronization using a fixed time step. For the performance analysis of this technique, we first present an intuitive understanding of the principle of the FIR filter method under consideration of the filter frequency response. We find that the frequency response of the FIR filter simply serves to extract the spectral component at the aliasing frequency found in the periodogram and diminish all other frequency components. Then we test the tracking limit and discuss the optimized filter length choice of the new bit pattern monitoring technique through numerical examples. It turns out that the optimal filter length is chosen as the one which minimized the measured jitter and can be found iteratively. Finally, we present an experimental verification of this FIR bit pattern synchronization method by measuring and reconstructing bit patterns of 40 Gb/s nonreturn-to-zero and 160 Gb/s return-to-zero data signals, respectively. &copy; 2011 Society of Photo-Optical Instrumentation Engineers (SPIE).

Number of references:13

Main heading:Iterative methods

Controlled terms:Clocks - FIR filters - Frequency response - Monitoring - Numerical methods - Optical communication - Optical frequency conversion - Optimization - Synchronization

Uncontrolled terms:Asynchronous optical samplings - Bit patterns - Clock-drift tolerant - Experimental verification - Fine synchronizations - Implementation aspects - Intuitive understanding - Monitoring techniques

Classification code:944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 943.3 Special Purpose Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 961 Systems Science - 921.6 Numerical Methods - 741.1.1 Nonlinear Optics - 717.1 Optical Communication Systems - 703.2 Electric Filters - 703.1 Electric Networks - 921.5 Optimization Techniques

DOI:10.1117/1.3640828

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

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Accession number:20113914362074

Title:Robust sparse tensor decomposition by probabilistic latent semantic analysis

Authors:Pang, Yanwei (1); Ma, Zhao (1); Pan, Jing (2); Yuan, Yuan (3)

Author affiliation:(1) School of Electronic Information Engineering, Tianjin University, Tianjin 300072, China; (2) School of Electronic Engineering, Tianjin University of Technology and Education, Tianjin 3000222, China; (3) State Key Laboratory of Transient Optics and Photonics, Center for OPTical IMagery Analysis and Learning (OPTIMAL), Xi'an Institute of Optics and Precision Mechanics, Xi'an 710119, Shaanxi, China

Corresponding author:Pang, Y.(pyw@tju.edu.cn)

Source title:Proceedings - 6th International Conference on Image and Graphics, ICIG 2011

Abbreviated source title:Proc. - Int. Conf. Image Graph., ICIG

Monograph title:Proceedings - 6th International Conference on Image and Graphics, ICIG 2011

Issue date:2011

Publication year:2011

Pages:893-896

Article number:6005968

Language:English

ISBN-13:9780769545417

Document type:Conference article (CA)

Conference name:6th International Conference on Image and Graphics, ICIG 2011

Conference date:August 12, 2011 - August 15, 2011

Conference location:Hefei, Anhui, China

Conference code:86574

Sponsor:National Natural Science Foundation of China; Chinese Academy of Science; Microsoft Research Asia; Xian Institute of Optics and Precision Mechanics of CAS; Anhui Crearo Technology Co., Ltd

Publisher:IEEE Computer Society, 445 Hoes Lane - P.O.Box 1331, Piscataway, NJ 08855-1331, United States

Abstract:Movie recommendation system is becoming more and more popular in recent years. As a result, it is becoming increasingly important to develop machine learning algorithm on partially-observed matrix to predict users' preferences on missing data. Motivated by the user ratings prediction problem, we propose a novel robust tensor probabilistic latent semantic analysis (RT-pLSA) algorithm that not only takes time variable into account, but also uses the periodic property of data in time attribute. Different from the previous algorithms of predicting missing values on two-dimensional sparse matrix, we formulize the prediction problem as a probabilistic tensor factorization problem with periodicity constraint on time coordinate. Furthermore, we apply the Tsallis divergence error measure in the context of RT-pLSA tensor decomposition that is able to robustly predict the latent variable in the presence of noise. Our experimental results on two benchmark movie rating dataset: Netflix and Movielens, show a good predictive accuracy of the model. &copy; 2011 IEEE.

Number of references:15

Main heading:Tensors

Controlled terms:Forecasting - Learning algorithms - Motion pictures - Semantics

Uncontrolled terms:Data sets - Divergence error - Latent variable - matrix - Missing data - Missing values - Movie ratings - Movie recommendation - Periodic properties - Prediction problem  - Predictive accuracy - Probabilistic latent semantic analysis - Sparse matrices - Sparse representation - Tensor analysis - Tensor decomposition - Tensor factorization - Time coordinates - Time variable - Topic model  - User rating

Classification code:723 Computer Software, Data Handling and Applications - 742.1 Photography - 903.2 Information Dissemination - 921 Mathematics - 921.1 Algebra

DOI:10.1109/ICIG.2011.98

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 77>

 

Accession number:20110713659495

Title:A technology to generate arbitrary electrical waveform for shaping high power laser

Authors:Liu, H. (1); Liu, B.-Y. (1); Bai, Y.-L. (1); Gou, Y.-S. (1); Zheng, J.-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 710119, China; (2) Graduate School of the Chinese, Academy of Sciences, Beijing 100049, China

Corresponding author:Liu, H.(liuhui3713@gmail.com)

Source title:Journal of Electromagnetic Waves and Applications

Abbreviated source title:J Electromagn Waves Appl

Volume:25

Issue:4

Issue date:January 1, 2011

Publication year:2011

Pages:495-506

Language:English

ISSN:09205071

E-ISSN:15693937

CODEN:JEWAE5

Document type:Journal article (JA)

Publisher:VSP BV, P.O.Box 9000, Leiden, 2300 PA, Netherlands

Abstract:In order to improve the output power of laser pulse in the inertia confinement fusion experiment, an arbitrary waveform generator is fabricated to shape the laser pulse. The arbitrary waveform generator is based on the micro-strip line transmission delay technology and GaAs Field Effect Transistor set which has a good ability of generating voltage-controlled current. To satisfy high amplitude requirement on electrical pulse for optical waveguide modulator, an ultra-broad bandwidth voltage tunable amplifier is applied to the output signals, and the pulse amplitude is adjustable. The designed generator generates a pulse waveform with amplitude between 0 and 5 V, duration less than 10 ns, 330 ps time-domain adjustment and a square pulse with rising edge 471 ps, falling edge 428 ps. The experiment results show the shaped laser pulse is obtained based on the shaping electrical pulse. &copy; 2011 VSP.

Number of references:23

Main heading:Pulse generators

Controlled terms:Field effect transistors - High power lasers - Laser pulses - Lasers - Light modulators - Waveform analysis

Uncontrolled terms:Arbitrary waveform generator - Broad bandwidths - Electrical pulse - Falling edge - Fusion experiments - GaAs - High amplitudes - Microstripes - Optical waveguide modulators - Output power  - Output signal - Pulse amplitude - Pulse waveforms - Shaped laser pulse - Square pulse - Time domain - Transmission delays - Voltage-controlled - Voltage-tunable - Wave forms

Classification code:713.4 Pulse Circuits - 714.2 Semiconductor Devices and Integrated Circuits - 741.3 Optical Devices and Systems - 744.1 Lasers, General - 921 Mathematics

DOI:10.1163/156939311794500287

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 78>

 

Accession number:20114214432387

Title:Generation of high-power tunable picosecond fiber laser

Authors:Liu, Hongjun (1); Gao, Cunxiao (1); Huang, Nan (1); Sun, Qibing (1); Long, Hanbo (1); Wen, Jin (1); Wang, Yishan (1); Zhao, Wei (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics Technology, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Liu, H.(liuhongjun@opt.ac.cn)

Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering

Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.

Volume:40

Issue:8

Issue date:August 2011

Publication year:2011

Pages:1438-1441

Language:Chinese

ISSN:10072276

Document type:Journal article (JA)

Publisher:Chinese Society of Astronautics, P.O. Box 225-32, Tianjin, 300192, China

Abstract:Generation technology of high-power tunable picosecond fiber laser based on the gain switch laser diode and Yb-doped fiber amplifier was experimentally studied. A gain switch laser diode was adopted as the seed source, and a multi-stage single mode Yb-doped fiber preamplifier was combined with two large mode area double-clad Yb-doped fiber main amplifiers to construct the amplification system. The gain compensation technology, tunable filter technology, Sagnac loop technology and cladding pump technology were also used in the high-power tunable fiber picosecond laser system. High stability and excellent beam quality (M<sup>2</sup> &lt; 1.2) pulses with 1MHz repetition rate, 10 W average power, 150ps pulse duration, 2.5-3 nm bandwidth (FWHM), and central wavelength tunable from 1053 nm to 1073 nm were generated. This system provides a compact, stable and reliable high-power tunable picosecond fiber laser source.

Number of references:11

Main heading:Fiber amplifiers

Controlled terms:Amplification - Amplifiers (electronic) - Diode amplifiers - Fibers - Pulse repetition rate - Pumping (laser) - Technology - Ytterbium

Uncontrolled terms:Average power - Central wavelength - Cladding pump - Compensation technology - Double-clad - Fiber laser source - Gain switch - Generation technologies - High stability - High-power  - Large mode area - Main amplifiers - Multi-stage - Picosecond laser - Picoseconds - Pulse durations - Repetition rate - Sagnac loop - Seed source - Single mode  - Tunable filters - Yb-doped fibers

Classification code:901 Engineering Profession - 817 Plastics and Other Polymers: Products and Applications - 812 Ceramics, Refractories and Glass - 744.4 Solid State Lasers - 744.1 Lasers, General - 713.1 Amplifiers - 547.2 Rare Earth Metals

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 79>

 

Accession number:20113914363022

Title:Spatially resolved X-ray spectroscopy using a flat HOPG crystal

Authors:Yuan, X.H. (1); Carroll, D.C. (1); Coury, M. (1); Gray, R.J. (1); Brenner, C.M. (1); Lin, X.X. (4); Li, Y.T. (4); Quinn, M.N. (1); Tresca, O. (1); Zielbauer, B. (3); Neely, D. (2); McKenna, P. (1)

Author affiliation:(1) SUPA, Department of Physics, University of Strathclyde, Glasgow G4 0NG, United Kingdom; (2) Central Laser Facility, Rutherford Appleton Laboratory, Oxfordshire OX11 0QX, United Kingdom; (3) PHELIX Department, Gesellschaft f&#252;r Schwerionenforschung MbH, Planckstrasse 1, D-64291 Darmstadt, Germany; (4) Beijing National Laboratory of Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China; (5) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:McKenna, P.(p.mckenna@phys.strath.ac.uk)

Source title:Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Abbreviated source title:Nucl Instrum Methods Phys Res Sect A

Volume:653

Issue:1

Issue date:October 11, 2011

Publication year:2011

Pages:145-149

Language:English

ISSN:01689002

CODEN:NIMAER

Document type:Conference article (CA)

Publisher:Elsevier, P.O. Box 211, Amsterdam, 1000 AE, Netherlands

Abstract:A novel design of a 1-D imaging X-ray spectrometer is implemented, using a high efficiency HOPG (highly oriented pyrolitic graphite) Bragg crystal and a double-entrance-slit. The double slit provides self-calibration of the imaging magnification. The spatial and spectral resolutions and dispersion are characterised both analytically and by ray tracing simulations. A key feature of this approach is that it enables the X-ray spectrum to be measured over different regions of the plasma source. The application of this instrument is demonstrated in high intensity laserfoil interaction experiments. &copy; 2010 Elsevier B.V.

Number of references:12

Main heading:Spectrometers

Controlled terms:Beam plasma interactions - X ray spectroscopy

Uncontrolled terms:Bragg crystals - Double slits - High intensity - Highly oriented pyrolitic graphites - HOPG crystal - Imaging X-ray spectrometers - Key feature - Laser-plasma interactions - Novel design - Ray tracing simulation  - Self calibration - Spatially resolved - X ray spectrum

Classification code:801 Chemistry - 932.3 Plasma Physics

DOI:10.1016/j.nima.2010.12.147

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 80>

 

Accession number:20113814357633

Title:Rapid pedestrian detection in unseen scenes

Authors:Cao, Xianbin (1); Wang, Zhong (1); Yan, Pingkun (2); Li, Xuelong (2)

Author affiliation:(1) University of Science and Technology of China, Hefei, 230026, 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, China; (3) The BeiHang University, Beijing 100083, China

Corresponding author:Yan, P.(pingkun@ieee.org)

Source title:Neurocomputing

Abbreviated source title:Neurocomputing

Volume:74

Issue:17

Issue date:October 2011

Publication year:2011

Pages:3343-3350

Language:English

ISSN:09252312

E-ISSN:18728286

CODEN:NRCGEO

Document type:Journal article (JA)

Publisher:Elsevier, P.O. Box 211, Amsterdam, 1000 AE, Netherlands

Abstract:In this paper, a rapid adaptive pedestrian detection method based on cascade classifier with ternary pattern is proposed. The proposed method achieves its goal by employing the following three new strategies: (1) A method for adjusting the key parameters of the trained cascade classifier dynamically for detecting pedestrians in unseen scenes using only a small amount of labeled data from the new scenes. (2) An efficient optimization method is proposed, based on the cross entropy method and a priori knowledge of the scenes, to solve the classifier parameter optimization problem. (3) In order to further speed up pedestrian detection in unseen scenes, each strong classifier in the cascade employs a ternary detection pattern. In our experiments, two significantly different datasets, AHHF and NICTA, were used as the training set and testing set, respectively. The experimental results showed that the proposed method can quickly adapt a previously trained detector for pedestrian detection in various scenes compared with other existing methods. &copy; 2011 Elsevier B.V.

Number of references:32

Main heading:Detectors

Controlled terms:Entropy - Feature extraction - Optimization

Uncontrolled terms:Adaptive detectors - Cascade classifier - Cross entropy - Pedestrian detection system - Ternary detection pattern

Classification code:641.1 Thermodynamics - 716 Telecommunication; Radar, Radio and Television - 914 Safety Engineering - 921.5 Optimization Techniques

DOI:10.1016/j.neucom.2011.05.019

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 81>

 

Accession number:20112714121448

Title:Design and realization of photoelectric theodolite remote control system based on network

Authors:Peng, Wei (1); Yang, Xiao-Jun (1); Cao, Jian-Zhong (1)

Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an 710019, China

Corresponding author:Peng, W.(pwhbyx@163.com)

Source title:2011 International Conference on Electric Information and Control Engineering, ICEICE 2011 - Proceedings

Abbreviated source title:Int. Conf. Electr. Inf. Control Eng., ICEICE - Proc.

Monograph title:2011 International Conference on Electric Information and Control Engineering, ICEICE 2011 - Proceedings

Issue date:2011

Publication year:2011

Pages:1281-1284

Article number:5778129

Language:English

ISBN-13:9781424480395

Document type:Conference article (CA)

Conference name:2011 International Conference on Electric Information and Control Engineering, ICEICE 2011

Conference date:April 15, 2011 - April 17, 2011

Conference location:Wuhan, China

Conference code:85257

Sponsor:IEEE Beijing Section ED Chapter; Jiangsu University

Publisher:IEEE Computer Society, 445 Hoes Lane - P.O.Box 1331, Piscataway, NJ 08855-1331, United States

Abstract:A new way to design and realize a net-based photoelectronic theodolite remote control system is proposed. Analyzes the reliability, net delay and net security problems of this system and uses buffer technology to ensure the reliability, uses password authentication technology to solve the security problem, uses multicast technology to improve the efficiency of network transmission, uses data extrapolation to solve the network delay problem. Practical application shows that the system meets the design requirements and makes the equipment unattended. &copy; 2011 IEEE.

Number of references:5

Main heading:Photoelectricity

Controlled terms:Control systems - Design - Multicasting - Remote control

Uncontrolled terms:Data extrapolation - Design requirements - Multicast technology - Multicasts - Network delays - Network transmission - Password authentication - photoelectric theodolite - Security problems

Classification code:408 Structural Design - 716 Telecommunication; Radar, Radio and Television - 717 Optical Communication - 718 Telephone Systems and Related Technologies; Line Communications - 731.1 Control Systems - 741.1 Light/Optics

DOI:10.1109/ICEICE.2011.5778129

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 82>

 

Accession number:20111513904131

Title:Synthesis, crystal structure and photophysical properties of a neodymium trifluoroacetate complex with 2,2'-bipyridine

Authors:She, Jiangbo (1); Li, Dongdong (1); Hou, Chaoqi (1); Yang, Wenzheng (1); Wei, Wei (2); 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 710119, China; (2) Institute of Advanced Materials, Nanjing University of Posts and Telecommunications, Nanjing 210003, China

Corresponding author:Wei, W.(weiwei@njupt.edu.cn)

Source title:Journal of Rare Earths

Abbreviated source title:J Rare Earth

Volume:29

Issue:3

Issue date:March 2011

Publication year:2011

Pages:193-197

Language:English

ISSN:10020721

CODEN:JREAE6

Document type:Journal article (JA)

Publisher:Chinese Rare Earth Society, 2 Xinjiekouwai Dajie, Beijing, 100088, China

Abstract:The neodymium trifluoroacetate complexes were synthesized and characterized by single-crystal X-ray diffraction for [Nd(CF<inf>3</inf>COO) <inf>3</inf>&middotBpy&middot(H<inf>2</inf>O)<inf>3</inf>]Bpy (1), elemental and TG analysis, FT-IR spectra, and PL spectra for Nd(CF<inf>3</inf>COO) <inf>3</inf>&middotBpy (2) (Bpy: 2,2'-bipyridine). The most interesting feature of the crystal structure for 1 is that it comprises a coordinated 2,2'-bipyridine molecule and an out-sphere 2,2'-bipyridine molecule. At the same time, the C-O distances appeared average which indicates the three atoms of carboxylato forming electron-conjugate system. Hydrogen bond and p-p-stacking link the binuclear to two-dimensional sheet. The optical spectra for 2 exhibited that the complex possessed typical Nd (III) ion absorption and photoluminescence emission. The emission cross-section of <sup>4</sup>F <inf>3/2</inf>&rarr<sup>4</sup>I<inf>11/2</inf> fluorescence transition (3.63&times;10<sup>-20</sup> cm<sup>2</sup>) was comparable with some laser glasses, which indicated good radiative properties of this neodymium trifluoroacetate complex in liquid matrix. The thermal analysis indicated that it was quite stable to heat. &copy; 2011 The Chinese Society of Rare Earths.

Number of references:22

Main heading:Crystal structure

Controlled terms:Glass lasers - Hydrogen - Hydrogen bonds - Luminescence - Neodymium - Rare earths - Spheres - Structural properties - Thermoanalysis - X ray diffraction

Uncontrolled terms:Bipyridines - Carboxylato - Conjugate systems - Emission cross-section - Fluorescence transitions - FT-IR spectrum - Ion absorption - Laser glass - Liquid matrix - Luminescent property  - Optical spectra - Photophysical properties - PL spectra - Radiative properties - Single crystal x-ray diffraction - Thermal analysis - Trifluoroacetates

Classification code:951 Materials Science - 931.3 Atomic and Molecular Physics - 804.2 Inorganic Compounds - 804 Chemical Products Generally - 801.4 Physical Chemistry - 801 Chemistry - 744.1 Lasers, General - 741.1 Light/Optics - 631 Fluid Flow - 547.2 Rare Earth Metals - 408 Structural Design

DOI:10.1016/S1002-0721(10)60429-2

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 83>

 

Accession number:20113614293326

Title:Photoreaction constants of fulgide films at different wavelengths

Authors:Du, Juan (1); Menke, Neimule (1); Yao, Baoli (2); Wang, Yingli (2); Chen, Yi (3)

Author affiliation:(1) School of Physical Science and Technology, Inner Mongolia Universtiy, Huhhot, 010021, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710068, China; (3) Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100101, China

Corresponding author:Menke, N.(py_menkenei@imu.edu.cn)

Source title:2011 International Conference on Remote Sensing, Environment and Transportation Engineering, RSETE 2011 - Proceedings

Abbreviated source title:Int. Conf. Remote Sens., Environ. Transp. Eng., RSETE - Proc.

Monograph title:2011 International Conference on Remote Sensing, Environment and Transportation Engineering, RSETE 2011 - Proceedings

Issue date:2011

Publication year:2011

Pages:6148-6154

Article number:5965760

Language:English

ISBN-13:9781424491711

Document type:Conference article (CA)

Conference name:2011 International Conference on Remote Sensing, Environment and Transportation Engineering, RSETE 2011

Conference date:June 24, 2011 - June 26, 2011

Conference location:Nanjing, China

Conference code:86226

Sponsor:Nanjing University of Information Science and Technology; Peking University; Fudan University; Tsinghua University; Jilin University

Publisher:IEEE Computer Society, 445 Hoes Lane - P.O.Box 1331, Piscataway, NJ 08855-1331, United States

Abstract:Two kinds of synthesized photochromic fulgide - pyrrylfulgide (F1) and 3-indoly-benzylfulgimide (F2) - are prepared as thin films doped in a polymethyl methacrylate (PMMA) matrix. Under irradiation by 405nm laser, the films convert from the colorless E-form (bleached state) into the C-form (colored state). When the C-forms are irradiated by 488nm, 514nm, 633nm or 650nm laser, the films returns to the E-forms. The photochromic kinetics of them under the irradiation of different wavelength lights (405nm, 488nm, 514nm, 633nm and 650nm) and the two-beam complementary suppression curve of F2 film under the irradiation of 633nm and 405nm lights are experimentally measured, which are simulated by using the first order kinetics and numerical calculation methods and the best simulating values of the photoreaction constants are obtained and compared. Under the irradiation of 633nm light, the photoreaction constants of the bleaching progress in F1 and F2 films (&gamma;<sup>C&rarrE</sup> <inf>633nm</inf>) are 1.4&times;10<sup>3</sup> cm<sup>2</sup>/mJ and 2.89&times;103 cm2/mJ respectively. Under the irradiation of 488nm, 514nm and 650nm lights, the relative values of photoreaction constant &gamma; <sup>c&rarr</sup>/&gamma;<sup>C&rarrE</sup><inf>633nm</inf> are same with the theoretical values getting from the absorption spectra and &gamma;<sup>E&rarrc</sup><inf>F2,40fm</inf> =5.5&times;10<sup>4</sup>cm <sup>2</sup>/m. The two-beam complementary suppression curves proved that &gamma; <sup>C &rarrE</sup><inf>F2,633</inf> and &gamma; <sup>E&rarrc</sup><inf>F2,405nm</inf> getting from the single beam irradiation curves are correct. And it is found that non-uniformity distribution of exciting light intensity has great affection to the deviation of the transmission curve from the first order dynamic curve. &copy; 2011 IEEE.

Number of references:11

Main heading:Photoreactivity

Controlled terms:Bleaching - Civil engineering - Cleaning - Irradiation - Numerical methods - Photochromism - Radiation - Remote sensing

Uncontrolled terms:3-indoly-benzylfulgimide - E-forms - First order - First order kinetics - Fulgides - Light intensity - matrix - Nonuniformity - Numerical calculation methods - Photochromic fulgide  - Photoreactions - Pyrrylfulgide - Relative value - Single beam - Theoretical values - Transmission curve

Classification code:921.6 Numerical Methods - 802.3 Chemical Operations - 802.2 Chemical Reactions - 741.1 Light/Optics - 731.1 Control Systems - 711 Electromagnetic Waves - 409 Civil Engineering, General

DOI:10.1109/RSETE.2011.5965760

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

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Accession number:20112614103086

Title:Design of large dimension and rear projecting lens in laser display system

Authors:Chen, Xu (1); Feng, Yu-Tao (3); Liu, Wei-Qi (1); Wei, Zhong-Lun (1); Kang, Yu-Si (1)

Author affiliation:(1) State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China; (2) Graduate University of Chinese Academy of Sciences, Beijing 100049, China; (3) Key Laboratory of Spectral Imaging Technology of Chinese Academy of Sciences, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Chen, X.(chxu2009@126.com)

Source title:Guangxue Jingmi Gongcheng/Optics and Precision Engineering

Abbreviated source title:Guangxue Jingmi Gongcheng

Volume:19

Issue:5

Issue date:May 2011

Publication year:2011

Pages:945-950

Language:Chinese

ISSN:1004924X

CODEN:GJGOF4

Document type:Journal article (JA)

Publisher:Chinese Academy of Sciences, 140 Renmin Street, Changchun, 130022, China

Abstract:After comparing different structures of wide-angle projecting lenses, a wide-angle lens for 162.6 cm(64 in) rear projection laser display is designed. The focal length of the system is 7.38 mm, the wavelength used in the design is F, d, C and the full field of view reaches 100&deg;. The technical indii of the projection lens are summarized as follows: DMD (Digital Micromirror Delice) is used in the light digital processing, 90% MTF is greater than 0.6 at the Nyquist frequency; the barrel distortion of the system is smaller than 1.4%, and 90% of the energy in the point target is focused in a pixel dimension. Furthermore, a right angle prism is used to fold the optical path to decrease the length of the lens, so that the whole optical length of the system is 259 mm after outspreading the right angle prism. The vignetting factor of the wide angle is negative, which enhances the image illumination after projection. Moreover, an aspheric surface with the small size, zero conic constant and the maximum eight order coefficient is used to promise the feasibility of the mounting. Analytical results show that the design can decrease the production costs of the projecting system and promote the technological industrialization.

Number of references:10

Main heading:Display devices

Controlled terms:Design - Lenses - Prisms

Uncontrolled terms:Analytical results - Aspheric surfaces - Barrel distortion - Different structure - Digital Micrmirror Device(DMD) - Digital micromirrors - Focal lengths - Full-field - Large dimensions - Laser display  - Laser display system - Nyquist frequency - Optical length - Optical path - Pixel dimension - Point targets - Production cost - Projection lens - Rear projection laser display system - Right angle prism  - Small size - Wide angle - Wide-angle lens

Classification code:408 Structural Design - 722.2 Computer Peripheral Equipment - 741.3 Optical Devices and Systems

DOI:10.3788/OPE.20111905.0945

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 85>

 

Accession number:20114214431743

Title:Compressed hyperspectral image sensing reconstruction based on interband prediction and joint optimization

Authors:Liu, Hai-Ying (1); Wu, Cheng-Ke (1); L&#252;, Pei (2); Song, Juan (1)

Author affiliation:(1) State Key Lab. of Integrated Service Networks, Xidian University, Xi'an 710071, China; (2) Xi'an Institute of Optics and Precision Mechanics of Chinese Acad. of Sci., Xi'an 710119, China

Corresponding author:Liu, H.-Y.(hyliu@mail.xidian.edu.cn)

Source title:Dianzi Yu Xinxi Xuebao/Journal of Electronics and Information Technology

Abbreviated source title:Dianzi Yu Xinxi Xuebao

Volume:33

Issue:9

Issue date:September 2011

Publication year:2011

Pages:2248-2252

Language:Chinese

ISSN:10095896

CODEN:DKXUEC

Document type:Journal article (JA)

Publisher:Science Press, 18,Shuangqing Street,Haidian, Beijing, 100085, China

Abstract:According to the correlation analysis of Compressed Sensing (CS) measurements for hyperspectral images, a new reconstruction algorithm based on interband prediction and joint optimization is proposed. In the method, linear prediction is first applied to remove the correlations among successive hyperspectral measurement vectors. The obtained residual measurement vectors are then recovered using the proposed joint optimization based POCS (Projections Onto Convex Sets) algorithm with the steepest descent method. In addition, a pixel-guided stopping criterion is introduced to stop the iteration. Experimental results show that the proposed algorithm exhibits its superiority over other known CS reconstruction algorithms in the literature at the same measurement rates, while with a faster convergence speed.

Number of references:16

Main heading:Forecasting

Controlled terms:Algorithms - Convergence of numerical methods - Independent component analysis - Optimization - Remote sensing - Set theory - Signal reconstruction - Steepest descent method

Uncontrolled terms:Compressive Sensing (CS) - Hyperspectral imagery - Linear prediction - Projections onto convex sets - Steepest descent

Classification code:716.1 Information Theory and Signal Processing - 723.4 Artificial Intelligence - 731.1 Control Systems - 921 Mathematics

DOI:10.3724/SP.J.1146.2010.01343

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 86>

 

Accession number:20112714112235

Title:Static imaging spectropolarimeter

Authors:Wang, Xin-Quan (1); Xiang, Li-Bin (2); Huang, Min (2); Hu, Liang (1); Jing, Juan-Juan (1)

Author affiliation:(1) Laboratory of Spectral Imaging Technique, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) Academy of Optoelectronics, Chinese Academy of Sciences, Beijing 100190, China; (3) Graduate University of Chinese Academy of Sciences, Beijing 100049, China

Corresponding author:Wang, X.-Q.(wangxinquan@opt.ac.cn)

Source title:Guangdianzi Jiguang/Journal of Optoelectronics Laser

Abbreviated source title:Guangdianzi Jiguang

Volume:22

Issue:5

Issue date:May 2011

Publication year:2011

Pages:689-692

Language:Chinese

ISSN:10050086

CODEN:GUJIE9

Document type:Journal article (JA)

Publisher:Board of Optronics Lasers, No. 47 Yang-Liu-Qing Ying-Jian Road, Tian-Jin City, 300380, China