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<RECORD 1>

 

Accession number:20133516674501

Title:Transductive face sketch-photo synthesis

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

Author affiliation:(1) VIPS Laboratory, 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 of Sydney, Ultimo, NSW 2007, Australia; (3) Center for OPTical IMagery Analysis and Learning, State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xi'an 710119, China

Source title:IEEE Transactions on Neural Networks and Learning Systems

Abbreviated source title:IEEE Trans. Neural Networks Learn. Sys.

Volume:24

Issue:9

Issue date:2013

Publication year:2013

Pages:1364-1376

Article number:6515363

Language:English

ISSN:2162237X

E-ISSN:21622388

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:Face sketch-photo synthesis plays a critical role in many applications, such as law enforcement and digital entertainment. Recently, many face sketch-photo synthesis methods have been proposed under the framework of inductive learning, and these have obtained promising performance. However, these inductive learning-based face sketch-photo synthesis methods may result in high losses for test samples, because inductive learning minimizes the empirical loss for training samples. This paper presents a novel transductive face sketch-photo synthesis method that incorporates the given test samples into the learning process and optimizes the performance on these test samples. In particular, it defines a probabilistic model to optimize both the reconstruction fidelity of the input photo (sketch) and the synthesis fidelity of the target output sketch (photo), and efficiently optimizes this probabilistic model by alternating optimization. The proposed transductive method significantly reduces the expected high loss and improves the synthesis performance for test samples. Experimental results on the Chinese University of Hong Kong face sketch data set demonstrate the effectiveness of the proposed method by comparing it with representative inductive learning-based face sketch-photo synthesis methods. &copy; 2012 IEEE.

Number of references:50

Main heading:Learning systems

Controlled terms:Optimization - Quadratic programming

Uncontrolled terms:Alternating optimizations - Chinese universities - Digital entertainment - Face sketch-photo synthesis - Inductive learning - Probabilistic graph models - Probabilistic modeling - Transductive learning

Classification code:731.5 Robotics - 921.5 Optimization Techniques

DOI:10.1109/TNNLS.2013.2258174

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 2>

 

Accession number:20134716989997

Title:Comparison of timing noise properties of carbon nanotubes, graphene and graphene oxide as saturable absorbers for a mode-locked Er-doped fiber laser

Authors:Li, Xiaohui (1); Wu, Kan (2); Shum, Perry Ping (2); Wang, Yonggang (3); Wang, Yishan (3); Wang, Qijie (1)

Author affiliation:(1) School of Electrical and Electronic Engineering, Nanyang Technological University, 50 Nanyang Ave., 639798, Singapore; (2) Centre for Disruptive Photonic Technologies, Nanyang Technological University, 21 Nanyang Link, 63737, Singapore; (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:Wang, Q.(qjwang@ntu.edu.sg)

Source title:CLEO: Science and Innovations,  CLEO_SI 2013

Abbreviated source title:Sci. Innov.

Monograph title:CLEO: Science and Innovations,  CLEO_SI 2013

Issue date:2013

Publication year:2013

Pages:JTu4A.06

Language:English

ISBN-13:9781557529725

Document type:Conference article (CA)

Conference name:CLEO: Science and Innovations,  CLEO_SI 2013

Conference date:June 9, 2013 - June 14, 2013

Conference location:San Jose, CA, United states

Conference code:100548

Publisher:Optical Society of American (OSA), 2010 Massachusetts Ave, NW, Washington, DC, DC 20036, United States

Abstract:We compare the timing noise properties of three most typical carbon materials, i.e., single walled carbon nanotubes, graphene and graphene oxide as saturable absorbers in a passively mode-locked Er-doped fiber laser as a test platform. &copy; OSA 2013.

Number of references:4

Main heading:Graphene

Controlled terms:Carbon nanotubes - Erbium - Fiber lasers - Locks (fasteners) - Mode-locked fiber lasers - Passive mode locking - Saturable absorbers

Uncontrolled terms:Carbon material - Er-doped fiber laser - Graphene oxides - Mode-locked - Passively mode-locked - Test platforms - Timing noise

Classification code:547.2 Rare Earth Metals - 601.3 Mechanisms - 744.1 Lasers, General - 744.4 Solid State Lasers - 761 Nanotechnology - 804 Chemical Products Generally

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 3>

 

Accession number:20133616692157

Title:Comparison of fused silica and oxyfluoride glass on laser induced initial damage morphology

Authors:Cheng, Qiang (1); Huang, Jin (2); Zhou, Xinda (2); Sun, Laixi (2); Jiang, Xiaodong (2); Sui, Zhan (2); Hou, Chaoqi (3); Wei, Wei (1); Peng, Bo (1)

Author affiliation:(1) Institute of Optoelectronics Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210046, China; (2) Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China; (3) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Xi'an 710119, China

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

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8786

Monograph title:Pacific Rim Laser Damage 2013: Optical Materials for High Power Lasers

Issue date:2013

Publication year:2013

Article number:878604

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819496027

Document type:Conference article (CA)

Conference name:Pacific Rim Laser Damage 2013: Optical Materials for High Power Lasers

Conference date:May 19, 2013 - May 22, 2013

Conference location:Shanghai, China

Conference code:98816

Sponsor:The Society of Photo-Optical Instrumentation Engineers (SPIE); Shanghai Institute of Optics and Fine Mechanics (SIOM); SCHOTT; OptoTech Germany; PulsePower

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

Abstract:A novel oxyfluoride glass (OFG) was prepared. The laser induced damage threshold (LIDT) of the novel OFG is 24.9% higher than fused silica under 355nm nanosecond laser irradiation by R-on-1 procedure. Characterization by optical microscope and scanning electron microscope shows that the initial damage morphologies of two kind of materials are significantly different. Experiment results indicate that the novel OFG can be a good candidate component material for high energy laser applications. &copy; 2013 SPIE.

Number of references:15

Main heading:Laser damage

Controlled terms:Fused silica - Glass - High energy lasers - High power lasers - Laser applications - Morphology - Optical materials - Scanning electron microscopy

Uncontrolled terms:Component materials - Initial damage - Laser induced - Laser induced damage thresholds - Oxy-fluoride glass

Classification code:741.1 Light/Optics - 741.3 Optical Devices and Systems - 744 Lasers - 812.3 Glass - 951 Materials Science

DOI:10.1117/12.2019995

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 4>

 

Accession number:20131316153590

Title:Detecting method of right-angled prism tilting

Authors:Zhao, Junli (1); Wu, Yiming (1); Gao, Limin (1)

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

Corresponding author:Zhao, J.(zhao.junli@163.com)

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

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

Volume:42

Issue:1

Issue date:January 2013

Publication year:2013

Pages:228-232

Language:Chinese

ISSN:10072276

Document type:Journal article (JA)

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

Abstract:In the azimuth aiming system, the sensitive-axis direction of inertial unit is monitored usually with the help of right-angled prism. The azimuth aiming error was produced by the right-angled prism tilting, through building the mathematical model of the influence of prism tilting on the aiming accuracy, the accurate vector expression was founded, in addition, the conventional measuring way and technique were introduced, furthermore, a new detecting and calibrating method of prism tilting based on the rhombic prism was studied, and some leading causes that affecting the measuring accuracy of the system were discussed. Then, experiment platform was built based on our own rhombic-equipment. The acquired data proves that the measurement results are greatly influenced by the device level state along the direction of prism titling, the calibrated system has achieved high measuring accuracy less than 10&Prime;. At the same time, this new system has obvious advantages on high measuring efficiency, and can be operated very simply and conveniently, it has a very important practical significance to improve the azimuth aiming precision.

Number of references:8

Main heading:Prisms

Controlled terms:Error analysis - Mathematical models

Uncontrolled terms:Aiming systems - Detecting methods - Experiment platforms - Inertial units - Measurement results - Measuring accuracy

Classification code:741.3 Optical Devices and Systems - 921 Mathematics - 921.6 Numerical Methods

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 5>

 

Accession number:20141317516412

Title:Optical system design of polarization imaging spectrometer for ground-based astronomical observation

Authors:Chang, Ling-Ying (1); Yao, Da-Wei (2); Zhao, Bao-Chang (2); Qiu, Yue-Hong (2)

Author affiliation:(1) Xi'an University of post and Telecommunications, Xi'an 710121, China; (2) Xi'an Institute Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

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

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8910

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Imaging Spectrometer Technologies and Applications

Issue date:2013

Publication year:2013

Article number:89101Z

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497796

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013  -  June 27, 2013

Conference location:Beijing, China

Conference code:100012

Sponsor:Chinese Society of Astronautics; European Optical Society; The Optical Society; The Society of Photo-Optical Instrumentation Engineers (SPIE)

Publisher:SPIE

Abstract:With the development of astrophysics, the astrophysics demands are higher and higher. Astronomical spectral polarization observation can obtain more object information to provide comprehensive data for further research. A polarization imaging spectrometer based on acousto-optic tunable filter was developed for ground-based telescope, which can obtain the image spectral polarization information at the same time. In this paper, first, the work principle of AOTF was introduced, then described the AOTF imaging system for ground-based astronomical observation, it covers the spectral band from 450nm to 900nm. The device can provide about 3.6&deg; view field angle and 10mm aperture, which included TeO<inf>2</inf> crystal, image optical system, a charged coupled device(CCD)camera, rf electronics and control and processing software. Finally the paper presented the results of optical design. &copy; 2013 SPIE.

Number of references:8

Main heading:Polarization

Controlled terms:Astrophysics - Optical design - Optical systems - Spectrometers - Spectroscopy - Telescopes

Uncontrolled terms:Acousto-optic tunable filters - AOTF - Astronomical observation - Ground-based telescopes - Hyperspectral Imaging - Imaging spectrometers - Polarization imaging - Spectral polarization

Classification code:741.1 Light/Optics - 741.3 Optical Devices and Systems - 801 Chemistry - 931.1 Mechanics

DOI:10.1117/12.2034993

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 6>

 

Accession number:20141317501124

Title:An all-optical encryption system for multi-wave signals

Authors:Duan, Jie (1); Wen, Yu (1); Duan, Tao (2); Xie, Xiaoping (1)

Author affiliation:(1) Xi'an Telecommunication College, Xi'an 710106, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, CAS, Xi'an 710119, China

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

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8906

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Laser Communication Technologies and Systems

Issue date:2013

Publication year:2013

Article number:89060E

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497758

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013  -  June 27, 2013

Conference location:Beijing, China

Conference code:100012

Sponsor:Chinese Society of Astronautics; European Optical Society; The Optical Society; The Society of Photo-Optical Instrumentation Engineers (SPIE)

Publisher:SPIE

Abstract:An all-optical encryption system which can be used in fiber WDM system and directly encrypt multi-wave optical signals is proposed. This scheme achieves multi-wave signals encrypting by the technology of generating coherently multi-wave optical plain text, Key text and the technology of phase shift interference. The feasibility and validity of this encrypting scheme are verified by simulative experiment for multi-wave signals at 8x10Gbps with wavelength interval of 0.8nm, the simulative result shows that when the input Pi and Ki is Gauss pulse with duty cycle of 0.3, the bit error rate and Q factor of encryption output are 0 and 164 respectively. Theory analysis and simulative experiment shows the scheme is feasible and efficient. &copy; 2013 Copyright SPIE.

Number of references:17

Main heading:Cryptography

Controlled terms:Experiments - Signal detection

Uncontrolled terms:All-optical XOR gate - Encryption system - Gauss pulse - Interference effects - Optical signals - Plain text - Wave divisions - WDM systems

Classification code:716 Telecommunication; Radar, Radio and Television - 716.1 Information Theory and Signal Processing - 717 Optical Communication - 718 Telephone Systems and Related Technologies; Line Communications - 723 Computer Software, Data Handling and Applications - 901.3 Engineering Research

DOI:10.1117/12.2032218

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 7>

 

Accession number:20134316904298

Title:Watt-level passively Q-switched double-cladding fiber laser based on graphene oxide saturable absorber

Authors:Yu, Zhenhua (1); Song, Yanrong (1); Dong, Xinzheng (1); Li, Yanlin (1); Tian, Jinrong (1); Wang, Yonggang (2)

Author affiliation:(1) Institute of Information Photonics Technology, College of Applied Sciences, Beijing University of Technology, Beijing 100124, 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

Corresponding author:Song, Y.(yrsong@bjut.edu.cn)

Source title:Applied Optics

Abbreviated source title:Appl. Opt.

Volume:52

Issue:29

Issue date:October 10, 2013

Publication year:2013

Pages:7127-7131

Language:English

ISSN:1559128X

E-ISSN:15394522

CODEN:APOPAI

Document type:Journal article (JA)

Publisher:Optical Society of American (OSA)

Abstract:A watt-level passively Q-switched ytterbium-doped double-cladding fiber laser with a graphene oxide (GO) absorber was demonstrated. The structure of the GO saturable absorber mirror (GO-SAM) was of the sandwich type. A maximum output power of 1.8 W was obtained around a wavelength of 1044 nm. To the best of our knowledge, this is the highest output power in Q-switched fiber lasers based on a GO saturable absorber. The pure GO was protected from the oxygen in the air so that the damage threshold of the GO-SAM was effectively raised. The gain fiber was a D-shaped ytterbium-doped doublecladding fiber. The pulse repetition rates were tuned from 120 to 215 kHz with pump powers from 3.89 to 7.8 W. The maximum pulse energy was 8.37 &mu;J at a pulse width of 1.7 &mu;s. &copy; 2013 Optical Society of America.

Number of references:23

Main heading:Q switching

Controlled terms:Cladding (coating) - Fiber lasers - Graphene - Optical pumping - Saturable absorbers - Ytterbium

Uncontrolled terms:Damage threshold - Double cladding fiber - Graphene oxides - Maximum output power - Passively Q-switched - Q-switched fiber lasers - Saturable absorber mirrors - Ytterbium-doped

Classification code:535.1 Metal Rolling - 547.2 Rare Earth Metals - 741.1 Light/Optics - 741.1.2 Fiber Optics - 744 Lasers - 761 Nanotechnology - 804 Chemical Products Generally

DOI:10.1364/AO.52.007127

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 8>

 

Accession number:20141317516357

Title:Alignment off-axis optical system using nodal aberration theory

Authors:Jiang, Bo (1); Zhou, Si-Zhong (1); Jiang, Kai (1); Fu, Huai-Yang (1); Mei, Chao (1)

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

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

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8910

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Imaging Spectrometer Technologies and Applications

Issue date:2013

Publication year:2013

Article number:89100E

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497796

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013  -  June 27, 2013

Conference location:Beijing, China

Conference code:100012

Sponsor:Chinese Society of Astronautics; European Optical Society; The Optical Society; The Society of Photo-Optical Instrumentation Engineers (SPIE)

Publisher:SPIE

Abstract:We present the Fringe Zernike coefficients of the parent system pupil can be converted into coefficients of off-axis system, it is show that the coefficients of the Fringe Zernike polynomials in the off-axis pupil only contain orders equal to or lower than the Fringe Zernike polynomials originally placed on the parent pupil, and for the 3<sup>rd</sup> aberration the pupil transformation matrix has been finding. Using nodal aberration, we get the misaligned matrix of rotational symmetry parent optical system. Then with the pupil transformation matrix, the misaligned matrix of off-axis two-mirror system was found, the amounts of the misalignments are calculated by the off-axis misaligned matrix. &copy; 2013 SPIE.

Number of references:14

Main heading:Linear transformations

Controlled terms:Alignment - Optical systems - Polynomials

Uncontrolled terms:Aberration theory - Misalignment - Off-axis - Rotational symmetries - Transformation matrices - Zernike coefficient - Zernike polynomials

Classification code:601.1 Mechanical Devices - 741.3 Optical Devices and Systems - 921.1 Algebra - 921.3 Mathematical Transformations

DOI:10.1117/12.2032379

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 9>

 

Accession number:20135017079648

Title:Theoretical and experimental study of 37-core waveguides with large mode area

Authors:Wang, Ping (1); Cheng, Guanghua (3); Yi, Ruimin (1); Liu, Xin (3); Shang, Tao (1); Wang, Zhansheng (1); Guo, Lixin (2)

Author affiliation:(1) State Key Laboratory of Integrated Service Networks, School of Telecommunications Engineering, Xidian University, Xi'an 710071, China; (2) School of Science, Xidian University, Xi'an 710071, 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:Wang, P.(pingwang@xidian.edu.cn)

Source title:Applied Optics

Abbreviated source title:Appl. Opt.

Volume:52

Issue:33

Issue date:November 20, 2013

Publication year:2013

Pages:7981-7986

Language:English

ISSN:1559128X

E-ISSN:15394522

CODEN:APOPAI

Document type:Journal article (JA)

Publisher:Optical Society of American (OSA)

Abstract:The evanescently coupled multicore waveguide lattice composed of 37 linear type I cores hexagonally arranged has been theoretically studied and fabricated by low-repetition-rate femtosecond laser inscription of bulk fused silica. The effects of the single core&acute;s numerical apertures (NAs) and spacing on the mode characteristics of the 37-core waveguide were calculated by the finite-element method. It was found that the mode field areas of the fundamental mode LP<inf>01</inf> with 5 &amp;mu;m spacing of different NAs were all larger than 577 &amp;mu;m<sup>2</sup>, which was confirmed by the experiments. The measured near-field mode profiles for different writing conditions and different spacing also showed that the waveguide supported both a single mode (LP <inf>01</inf>) and two modes (LP<inf>01</inf> and LP<inf>11</inf>). The multicore waveguide, according to our study, is particularly interesting for mode converters. &copy; 2013 Optical Society of America.

Number of references:33

Main heading:Waveguides

Controlled terms:Finite element method - Numerical methods

Uncontrolled terms:Femtosecond laser inscriptions - Fundamental modes - Large mode area - Mode characteristics - Mode converter - Mode field area - Mode profiles - Numerical aperture

Classification code:714.3 Waveguides - 921.6 Numerical Methods

DOI:10.1364/AO.52.007981

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 10>

 

Accession number:20132016340402

Title:The improved design of encoding mask and the correcting method for recovered spectral images in Hadamard transform spectral imager based on DMD

Authors:Xu, Jun (1); Xie, Cheng-Wang (2); Liu, Hai-Wen (1); Liu, Qiang (3); Li, Bin-Cheng (4)

Author affiliation:(1) School of Information Engineering, East China Jiaotong University, Nanchang 330013, China; (2) School of Software, East China Jiaotong University, Nanchang 330013, China; (3) Key Laboratory of Spectral Imaging Technique, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (4) Key Laboratory of Beam Control, Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, China

Corresponding author:Xu, J.(xjsdcq@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:33

Issue:5

Issue date:May 2013

Publication year:2013

Pages:1419-1423

Language:Chinese

ISSN:10000593

CODEN:GYGFED

Document type:Journal article (JA)

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

Abstract:A novel type of DMD-based Hadamard transform spectral imager is introduced. Taking the 7-order S-matrix as an example for discussion, the present paper develops an improved design of Hadamard encoding mask, which makes the dispersed spectrum of all pixels to be encoded by seven elements strictly. A correcting method for the recovered spectral images is proposed, and eventually 6 high-quality spectral images are obtained when Hadamard transform spectral imager operates based on 7-order S-matrix. Similarly, if the spectral imager operates based on n-order S-matrix, n-1 spectral images can be obtained. The experimental results show that the improved design and the correction method are feasible and effective.

Number of references:11

Main heading:Spectroscopy

Controlled terms:Design - Encoding (symbols) - Hadamard transforms - Image coding - Scattering parameters

Uncontrolled terms:Correcting method - Correction method - DMD - Encoding masks - High quality - Improved designs - Spectral imager - Spectral images

Classification code:408 Structural Design - 703.1 Electric Networks - 723.2 Data Processing and Image Processing - 801 Chemistry - 921.1 Algebra

DOI:10.3964/j.issn.1000-0593(2013)05-1419-05

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 11>

 

Accession number:20134216857687

Title:Improved design of support for large aperture space lightweight mirror

Authors:Wang, Chao (1); Ruan, Ping (1); Liu, Qimin (1)

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

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

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8908

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Imaging Sensors and Applications

Issue date:2013

Publication year:2013

Article number:89081P

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497772

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013 - June 27, 2013

Conference location:Beijing, China

Conference code:100012

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

Abstract:In order to design a kind of rational large aperture space mirror which can adapt to the space gravity and thermal environment, by taking the choice of material, the lightweight of the mirror and the design of support into account in detail, a double-deck structure with traditional flexible hinge was designed, then the analytical mathematical model of the mirror system was established. The design adopts six supports on back. in order to avoid the constraints, mirror is connected to three middle transition pieces through six flexible hinges, and then the three transition pieces are connected to support plate through another three flexible hinges. However, the initial structure is unable to reach the expected design target and needs to be made further adjustments. By improving and optimizing the original structure, a new type of flexible hinge in the shape of the letter A is designed finally. Compared with the traditional flexible hinge structure, the new structure is simpler and has less influence on the surface figure accuracy of mirror. By using the finite element analysis method, the static and dynamic characteristics as well as the thermal characteristics of the mirror system are analyzed. Analysis results show that the maximum PV value is 37 nm and the maximum RMS value is 10.4 nm when gravity load is applied. Furthermore, the maximum PV value is 46 nm and the maximum RMS value is 10.5 nm under the load case of gravity coupled with 4a&circ;.,uniform temperature rise. The results satisfy the index of optical design. The first order natural frequency of the mirror component is 130 Hz according to the conclusion obtained by modal analytical solution, so the mirror structure has high enough fundamental frequency. And, the structural strength can meet the demand under the overload and the random vibration environment respectively. It indicates that the mirror component structure has enough dynamic, static stiffness and thermal stability, meeting the design requirements. &copy; 2013 SPIE.

Number of references:13

Main heading:Mirrors

Controlled terms:Finite element method - Hinges - Mathematical models - Natural frequencies - Optical design

Uncontrolled terms:Finite element analysis method - First order natural frequency - Flexible hinge structures - Flexible supports - lightweight - Optimum designs - Static and dynamic characteristics - Surface figure accuracies

Classification code:605 Small Tools and Hardware - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 921 Mathematics - 921.6 Numerical Methods

DOI:10.1117/12.2034456

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 12>

 

Accession number:20124615668441

Title:Transfer learning for pedestrian detection

Authors:Cao, Xianbin (1); Wang, Zhong (2); Yan, Pingkun (3); Li, Xuelong (3)

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

Corresponding author:Yan, P.(pingkun@gmail.com)

Source title:Neurocomputing

Abbreviated source title:Neurocomputing

Volume:100

Issue date:January 16, 2013

Publication year:2013

Pages:51-57

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:Most of the existing methods for pedestrian detection work well, only when the following assumption is satisfied: the features extracted from the training dataset and the testing dataset have very similar distributions in the feature space. However, in practice, this assumption does not hold because of the scene complexity and variation. In this paper, a new method is proposed for detecting pedestrians in various scenes based on the transfer learning technique. Our proposed method employs the following two strategies for improving the pedestrian detection performance. First, a new sample screening method based on manifold learning is proposed. The basic idea is to choose samples from the training set, which may be similar to the samples from the unseen scene, and then merge the selected samples into the unseen set. Second, a new classification model based on transfer learning is proposed. The advantage of the classification model is that only a small number of samples need to be used from the unseen scenes. Most of the training samples are still obtained from the training scene, which take up to 90% of the entire training samples. Compared to the traditional pedestrian detection methods, the proposed algorithm can adapt to different scenes for detecting pedestrians. Experiments on two pedestrian detection benchmark datasets, DC and NICTA, showed that the method can obtain better performance as compared to other previous methods. &copy; 2012 Elsevier B.V.

Number of references:31

Main heading:Screening

Controlled terms:Benchmarking - Sampling - Statistical tests

Uncontrolled terms:Benchmark datasets - Classification models - Data sets - Feature space - Manifold learning - Number of samples - Pedestrian detection - Scene change - Scene complexity - Screening methods  - Training dataset - Training sample - Training sets - Transfer learning

Classification code:524 Solid Fuels - 801 Chemistry - 912 Industrial Engineering and Management - 913 Production Planning and Control; Manufacturing - 922.2 Mathematical Statistics

DOI:10.1016/j.neucom.2011.12.043

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 13>

 

Accession number:20134216859393

Title:Global structure constrained local shape prior estimation for medical image segmentation

Authors:Yan, Pingkun (1); Zhang, Wuxia (1); Turkbey, Baris (2); Choyke, Peter L. (2); Li, Xuelong (1)

Author affiliation:(1) Center for OPTical IMagery Analysis and Learning (OPTIMAL), State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xi'an, 710119 Shaanxi, China; (2) National Institutes of Health, National Cancer Institute, Bethesda, MD 20892, United States

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

Source title:Computer Vision and Image Understanding

Abbreviated source title:Comput Vision Image Understanding

Volume:117

Issue:9

Issue date:2013

Publication year:2013

Pages:1017-1026

Language:English

ISSN:10773142

E-ISSN:1090235X

CODEN:CVIUF4

Document type:Journal article (JA)

Publisher:Academic Press Inc., 1250 Sixth Avenue, San Diego, California, CA 92101, United States

Abstract:Organ shape plays an important role in clinical diagnosis, surgical planning and treatment evaluation. Shape modeling is a critical factor affecting the performance of deformable model based segmentation methods for organ shape extraction. In most existing works, shape modeling is completed in the original shape space, with the presence of outliers. In addition, the specificity of the patient was not taken into account. This paper proposes a novel target-oriented shape prior model to deal with these two problems in a unified framework. The proposed method measures the intrinsic similarity between the target shape and the training shapes on an embedded manifold by manifold learning techniques. With this approach, shapes in the training set can be selected according to their intrinsic similarity to the target image. With more accurate shape guidance, an optimized search is performed by a deformable model to minimize an energy functional for image segmentation, which is efficiently achieved by using dynamic programming. Our method has been validated on 2D prostate localization and 3D prostate segmentation in MRI scans. Compared to other existing methods, our proposed method exhibits better performance in both studies. &copy; 2013 Elsevier Inc. All rights reserved.

Number of references:34

Main heading:Medical image processing

Controlled terms:Deformation - Diagnosis - Image segmentation - Medical imaging

Uncontrolled terms:3d prostate segmentations - Better performance - Clinical diagnosis - Deformable modeling - Manifold assumption - Manifold learning - Prostate localization - Shape model

Classification code:421 Strength of Building Materials; Mechanical Properties - 422 Strength of Building Materials; Test Equipment and Methods - 461.6 Medicine and Pharmacology - 723.2 Data Processing and Image Processing

DOI:10.1016/j.cviu.2013.03.006

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 14>

 

Accession number:20131616213975

Title:Laboratory radiation calibration method of Hadamard transform imaging spectrometer

Authors:Bai, Junke (1); Liu, Xuebin (1); Yan, Peng (1); Hu, Bingliang (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) University of Chinese Academy of Sciences, Beijing 100049, China

Corresponding author:Bai, J.(jakeybai@163.com)

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

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

Volume:42

Issue:2

Issue date:February 2013

Publication year:2013

Pages:503-506

Language:Chinese

ISSN:10072276

Document type:Journal article (JA)

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

Abstract:Hadamard transform imaging spectrometer is a multi-channel detection digital transform spectrometer detection technology. The spectromter used this technology to achieving spectral imaging. Based on the digital micromirror array device of the Hadamard transform spectrometer working principles and the instrument, a series of precision laboratory calibration methods were researched and employed for the Hadamard transform imaging spectrometer. A point light source in long distance was used for the pixel response nonuniformity correction of the CMOS detector. The uncertainty of the relative calibration was 4.6%. Solar simulator and spectral radiometer were used in absolute radiation calibration of the whole system, and the uncertainty of the absolute radiation calibration was 8.92%. Both of the uncertainty of relative calibration and the uncertainty of the absolute radiation calibration met the requirements of the projection. By actual objects imaging, the laboratory calibration methods of the Hadamard transform imaging spectrometer are proved accurate.

Number of references:8

Main heading:Calibration

Controlled terms:CMOS integrated circuits - Hadamard transforms - Light sources - Spectrometers - Spectroscopy

Uncontrolled terms:Absolute calibration - Digital micromirror arrays - Digital transform spectrometers - Hadamard - Hadamard transform spectrometers - Nonuniformity correction - Radiation calibration - Relative calibrations

Classification code:944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 921.1 Algebra - 801 Chemistry - 714.2 Semiconductor Devices and Integrated Circuits

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 15>

 

Accession number:20132416417760

Title:Two-photon fluorescence stereomicroscopy with bessel beams

Authors:Yang, Yanlong (1); Lei, Ming (1); Zheng, Juanjuan (1); Li, Runze (1); Yan, Shaohui (1); Yao, Baoli (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) Department of Neurobiology, University of Alabama at Birmingham, Birmingham, AL 35294, United States

Corresponding author:Ye, T.(tongtye@gmail.com)

Source title:Progress in Biomedical Optics and Imaging - Proceedings of SPIE

Abbreviated source title:Progr. Biomed. Opt. Imaging Proc. SPIE

Volume:8588

Monograph title:Multiphoton Microscopy in the Biomedical Sciences XIII

Issue date:2013

Publication year:2013

Article number:85882K

Language:English

ISSN:16057422

ISBN-13:9780819493576

Document type:Conference article (CA)

Conference name:Multiphoton Microscopy in the Biomedical Sciences XIII

Conference date:February 3, 2013 - February 5, 2013

Conference location:San Francisco, CA, United states

Conference code:97277

Sponsor:The Society of Photo-Optical Instrumentation Engineers (SPIE); Becker and Hickel GmbH; Boston Electronics Corporation; Coherent, Inc.; Intelligent Software Solutions, Inc.

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

Abstract:Three dimensional distributions of cells can be usually acquired by optical sectioning methods, such as multiphoton excitation and confocal fluorescence laser scanning microscopy. Though the lateral scan rates can reach up to several kHz, the relatively slow axial scan comprises the speed of real-time imaging of a volume. Here we propose a three dimensional imaging method that uses Bessel beams as excitation in multiphoton fluorescence microscopy. The extended focus of the Bessel beam allows recording a volume of cells without scanning the depth. The depth information can be retrieved by recording a pair of parallax views of the same volume. We have demonstrated the stereoscope capability on a homebuilt two-photon fluorescence microscope. &copy; 2013 SPIE.

Number of references:13

Main heading:Laser beams

Controlled terms:Bessel functions - Fluorescence - Fluorescence microscopy - Geometrical optics - Optical waveguides - Photography - Photons - Three dimensional

Uncontrolled terms:Bessel beam - Confocal fluorescence - Extended depth of field - Laser scanning microscopy - Multiphoton excitation - Multiphoton fluorescence microscopy - Three dimensional imaging - Two photon fluorescence

Classification code:921 Mathematics - 902.1 Engineering Graphics - 746 Imaging Techniques - 744.8 Laser Beam Interactions - 741.3 Optical Devices and Systems - 741.1 Light/Optics - 461.9.1 Immunology

DOI:10.1117/12.2002850

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 16>

 

Accession number:20135217127635

Title:Subwavelength multiple focal spots produced by tight focusing the patterned vector optical fields

Authors:Cai, Mengqiang (1); Tu, Chenghou (1); Zhang, Huihui (1); Qian, Shengxia (1); Lou, Kai (1); Li, Yongnan (1); Wang, Hui-Tian (1)

Author affiliation:(1) MOE Key Laboratory of Weak Light Nonlinear Photonics, School of Physics, Nankai University, Tianjin 300071, China; (2) National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China; (3) 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

Source title:Optics Express

Abbreviated source title:Opt. Express

Volume:21

Issue:25

Issue date:December 16, 2013

Publication year:2013

Pages:31469-31482

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:We numerically and experimentally explored generation and regulation of subwavelength multiple focal spots produced by tight focusing patterned vector optical fields (PVOFs). We presented a modified Richard-Wolf diffraction integration method suitable for the tight focusing of the PVOFs. By tailoring the spatial geometry and the polarization distributions of the PVOFs, simulations show that the diverse spatial configurations of subwavelength multiple focal spots can be achieved. To verify our idea, we experimentally generated the theoretically calculated examples of femtosecond PVOFs, then tightly focused them on the surface of the crystalline silicon wafers, and finally characterized the morphologies of modified surfaces. The SEM (scanning electronic microscopy) images confirmed that the experimental results are in good agreement with the simulations. Based on the diverse controlling degrees of freedom of PVOFs, the resultant subwavelength focal fields are flexible and powerful in parallel processing, optical manipulation and so on. &copy; 2013 Optical Society of America.

Number of references:24

Main heading:Optics

Controlled terms:Optical constants

Uncontrolled terms:Crystalline silicon wafers - Integration method - Modified surfaces - Optical manipulation - Parallel processing - Polarization distributions - Scanning electronic microscopy - Spatial configuration

Classification code:741.1 Light/Optics

DOI:10.1364/OE.21.031469

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 17>

 

Accession number:20133016522178

Title:Higher quantum efficiency GaAs photocathode material with exponential-doping structure

Authors:Chen, Huailin (1); Yang, Wenzheng (2); Tang, Weidong (2); Fu, Xiaoqian (1); Du, Yujie (1); Zhang, Junju (1)

Author affiliation:(1) School of Electronic Engineering and Optoelectronic Technology, Nanjing University of Science and Technology, Nanjing, 210094, China; (2) Xi'An Institute of Optics and Precision Mechanics of CAS, Xi'an, 710119, China

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

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8761

Monograph title:PIAGENG 2013: Image Processing and Photonics for Agricultural Engineering

Issue date:2013

Publication year:2013

Article number:87610W

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819495587

Document type:Conference article (CA)

Conference name:3rd International Conference on Photonics and Image in Agriculture Engineering, PIAGENG 2013

Conference date:January 27, 2013 - January 28, 2013

Conference location:Sanya, China

Conference code:97677

Sponsor:Wuhan University of Technology; Information Engineering Research Institute

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

Abstract:To improve the performance of GaAs NEA photocathodes, an exponential-doping structure GaAs material has been put forward, in which from the GaAs bulk-to-surface doping concentration is distributed exponentially from high to low. We apply this exponential-doping GaAs structure to the transmission-mode GaAs photocathodes. This sample was grown on the high quality p-type Be-doped GaAs (100) substrate by MBE. We have calculated the band-bending energy in exponential-doping GaAs emission-layer, and the total band-bending energy is 59 meV which helps to improve the photoexcited electrons movement towards surface for the thin epilayer. The integrated sensitivity of the exponential-doping GaAs photocathode samples reaches 1547uA/lm. &copy; 2013 SPIE.

Number of references:7

Main heading:Gallium arsenide

Controlled terms:Field emission cathodes - Image processing - Photocathodes - Photonics - Semiconducting gallium

Uncontrolled terms:Doping concentration - GaAs photocathodes - GaAs(1 0 0) - High quality - NEA photocathode - Negative electron affinity - Photoexcited electrons - Transmission mode

Classification code:804 Chemical Products Generally - 744 Lasers - 741 Light, Optics and Optical Devices - 717 Optical Communication - 714.1 Electron Tubes - 712.1.1 Single Element Semiconducting Materials - 712 Electronic and Thermionic Materials

DOI:10.1117/12.2020136

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 18>

 

Accession number:20132616448354

Title:Misalignment induced aberration characteristic of TMA optical system

Authors:Pang, Zhihai (1); Fan, Xuewu (1); Chen, Qinfang (1); Ma, Zhen (1)

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

Corresponding author:Pang, Z.(uestc_pzh@126.com)

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

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

Volume:42

Issue:3

Issue date:March 2013

Publication year:2013

Pages:653-657

Language:Chinese

ISSN:10072276

Document type:Journal article (JA)

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

Abstract:Based on the vector wavefront aberration theory, the misalignment induced aberration's characteristic of TMA optical system was analyses in this paper. It is shown that a misaligned TMA has three residual 3rd aberrations. The 3rd order spherical aberration that is constant over the field and the 3rd order coma is a constant in magnitude and orientation over the field. Moreover, the 3rd order astigmatism is field-asymmetric in orientation and increases linearly with the field, and the location zero for the field-asymmetric, field linear astigmatism always reside at the center of the field of view. It has been demonstrated that a TMA under assembly is only measured to have perfect performance on-axis which is not aligned in any significant way, so the measurements of multiple field points for the TMA are required in the process of alignment. Under condition of remove axial coma, if astigmatism is measured on-axis, which is caused by the primary mirror astigmatic figure error but not the misalignment.

Number of references:13

Main heading:Optical systems

Controlled terms:Aberrations - Alignment - Mirrors

Uncontrolled terms:Field of views - Measurements of - Misalignment - Optical assemblies - Primary mirrors - Spherical aberrations - Three-mirror anastigmatic - Wavefront aberrations

Classification code:601.1 Mechanical Devices - 741 Light, Optics and Optical Devices - 741.3 Optical Devices and Systems

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 19>

 

Accession number:20140317209496

Title:Image definition evaluation algorithm based on color relativity

Authors:Guo, Huinan (1); Cao, Jianzhong (1); Zhou, Zuofeng (1); Tang, Linao (1); Wang, Hua (1); Ma, Nan (2)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) People's Liberation Army of No. 95879, Chengdu 610081, China

Corresponding author:Guo, H.(s09068@opt.cn)

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

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

Volume:42

Issue:11

Issue date:November 2013

Publication year:2013

Pages:3132-3136

Language:Chinese

ISSN:10072276

Document type:Journal article (JA)

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

Abstract:Definition evaluation function of digital image plays an important role in digital camera auto-focus. Due to the existing definition evaluation functions are of some marked disadvantages, a spatial domain evaluation algorithm for digital color image was proposed. The colorful property of each pixel was judged and definition chromatic difference parameters was created by using chromatic difference between their tri-stimulus values. Besides, nonlinear function was used to improve the gradient coefficient of each pixel which made the evaluation function be more sensitive to some images in extreme cases. Experimental results show the superiority of our algorithm over the most of existing evaluation algorithms in dealing with natural images. And our method also is of a good ability of robustness as well as reducing calculation complexity and it can be easily achieved on hardware.

Number of references:8

Main heading:Function evaluation

Controlled terms:Algorithms - Gradient methods - Pixels - Relativity

Uncontrolled terms:Auto focus - Difference parameters - Digital color images - Evaluation algorithm - Evaluation function - Image definition - Nonlinear functions - Spatial domains

Classification code:723 Computer Software, Data Handling and Applications - 723.5 Computer Applications - 921 Mathematics - 921.6 Numerical Methods - 931.5 Gravitation, Relativity and String Theory

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 20>

 

Accession number:20134817030991

Title:Calculation method of earth-atmosphere stray light illuminance on low-orbit space cameras

Authors:Du, Yujun (1); He, Yinghong (2); Chen, Haibin (1); Xin, Weijuan (1); Xue, Bing (2)

Author affiliation:(1) School of Optoelectronics Engineering, Xi'an Technological University, Xi'an, China; (2) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an, China

Source title:Journal of Multimedia

Abbreviated source title:J. Multimedia

Volume:8

Issue:6

Issue date:2013

Publication year:2013

Pages:699-704

Language:English

ISSN:17962048

Document type:Journal article (JA)

Publisher:Academy Publisher, P.O.Box 40,, OULU, 90571, Finland

Abstract:The earth-atmosphere stray light can lower contrast ratio and SNR of spatial optical remote sensors, or even fail the system at certain conditions. Errors in the calculation of the stray light illuminance based on point source are very large, for the satellite's altitude is only several hundred kilometers and far less than the radius of the earth. This paper proposed a stray light illuminance calculating method which viewed the earth as a plane stray source and introduced the method in detail. Using the calculating method, earth-atmosphere stray light illuminance on the camera image plane for a low-orbit space camera at a typical position is calculated, and the results were compared with those calculated by viewing the earth as a point source, which evidently show that, when considering the earth-atmosphere stray light's effects on low-orbit space cameras, it's necessary to treat the earth as a plane extended light source. &copy; 2013 Academy Publisher.

Number of references:15

Main heading:Earth atmosphere

Controlled terms:Cameras - Light sources - Orbits - Stray light

Uncontrolled terms:Calculating methods - Camera images - Contrast ratio - Light illuminance - Optical remote sensors - Point source transmission - Point sources - Space cameras

Classification code:443.1 Atmospheric Properties - 655.2 Satellites - 741.1 Light/Optics - 742.2 Photographic Equipment

DOI:10.4304/jmm.8.6.699-704

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 21>

 

Accession number:20134817032699

Title:The applications of laser tracking and ranging technology in space rendezvous and docking

Authors:She, Wenji (1); Gao, Limin (1); Zhou, Liang (2); Li, Dawei (1); Wang, Rong (3)

Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics of CAS, Shaanxi 710119, China; (2) University of Chinese, Academy of Sciences, Shaanxi 710119, China; (3) Xi'An University of Architecture and Technology, Shaanxi 710119, China

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

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8905

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Laser Sensing and Imaging and Applications

Issue date:2013

Publication year:2013

Article number:89050S

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497741

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013 - June 27, 2013

Conference location:Beijing, China

Conference code:100012

Sponsor:The Society of Photo-Optical Instrumentation Engineers (SPIE); The Optical Society; European Optical Society; Chinese Society of Astronautics

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

Abstract:With the development of space technology, more and more Rendezvous and Docking (RVD) mission require more precise measurement of relative position and attitude between tracking spacecraft and target spacecraft. In the procedure of docking between near spacecraft, the optical retroreflector on the target Spacecraft were tracked by the laser tracking and ranging device on the tracking spacecraft, the distance data were provided by laser ranging system, and the azimuth data were provided by tracking gimbal, Synthesized the distance data and azimuth data, the relative position information between two spacecraft were provided to the target spacecraft. Furthermore, through tracking more than three point on the target spacecraft,the complete information of relative position and attitude between two spacecraft were calculated rapidly by the measurement system, which were presented to the control system during the whole RVD operating stage. The laser tracking technology guaranteed continuous measurement and supplied accurate azimuth information, and the laser ranging technology ensured high accuracy of distance information. In addition, the untouched measure mode give no disturbance to the docking operation, moreover, the monochromaticity of laser make the tracking and ranging procedure avoiding to be disturbed by parasitic light of space, thus there will be a effective measurement accompanying the whole docking operating procedure and affording valid data to the control system of docking. &copy; 2013 SPIE.

Number of references:5

Main heading:Spacecraft

Controlled terms:Control systems - Docking - Laser applications - Manned space flight - Target tracking

Uncontrolled terms:Complete information - Continuous measurements - Distance information - Laser ranging systems - Laser tracking - Precise measurements - Relative position and attitude - Rendezvous and docking

Classification code:655.1 Spacecraft, General - 656.1 Space Flight - 731.1 Control Systems - 744.9 Laser Applications

DOI:10.1117/12.2033065

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 22>

 

Accession number:20134817027115

Title:Investigation and control of ultrafast laser-induced isotropic and anisotropic nanoscale-modulated index patterns in bulk fused silica

Authors:Stoian, R. (1); Mishchik, K. (1); Cheng, G. (2); Mauclair, C. (1); D'Amico, C. (1); Colombier, J.P. (1); Zamfirescu, M. (3)

Author affiliation:(1) Laboratoire Hubert Curien, UMR 5516 CNRS, Universit&#233; de Lyon, Universit&#233; Jean Monnet, 42000 Saint Etienne, France; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, 710119 Xi'an, Shaanxi, China; (3) National Institute for Laser, Plasma and Radiation Physics, 077125 Magurele, Bucharest, Romania

Corresponding author:Stoian, R.(razvan.stoian@univ-st-etienne.fr)

Source title:Optical Materials Express

Abbreviated source title:Opt. Mater. Express

Volume:3

Issue:10

Issue date:2013

Publication year:2013

Pages:1755-1768

Language:English

E-ISSN:21593930

Document type:Journal article (JA)

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

Abstract:Ultrafast laser-induced refractive index changes in a-SiO<inf>2</inf> consist, depending on the irradiation conditions, of either positive variations, voids, or regular nanoscale patterns, each of these underlying specific structural transformations. These allow for obtaining a large palette of optical functions ranging from low loss guiding to anisotropic scattering. While briefly reviewing the excitation mechanisms, we spectroscopically interrogate local electronic and structural transformations of the glass in the isotropic index zones and in the regular self-organized nanostructures, indicating bond breaking and matrix oxygen deficiency. A spatial defect segregation marks the material transformation in the different photoinscription regimes. We equally propose a method of real time control of nanogratings formation under the action of ultrashort laser pulse with variable envelopes. Application as polarizing optical devices is discussed. &copy; 2013 Optical Society of America.

Number of references:43

Main heading:Linear transformations

Controlled terms:Nanotechnology - Real time control - Ultrafast lasers - Ultrashort pulses

Uncontrolled terms:Anisotropic scattering - Excitation mechanisms - Irradiation conditions - Material transformation - Nano-scale patterns - Refractive index changes - Self-organized nanostructures - Structural transformation

Classification code:731 Automatic Control Principles and Applications - 732 Control Devices - 744.1 Lasers, General - 761 Nanotechnology - 921.3 Mathematical Transformations

DOI:10.1364/OME.3.001755

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 23>

 

Accession number:20130415941264

Title:A new method of processing high-precision micro-hole with the femtosecond laser

Authors:Yang, Xiaojun (1); Li, Ming (1); Wang, Li (2); Zhao, Hualong (1); Cheng, Guagnhua (1)

Author affiliation:(1) State Key Laboratory Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) Shenyang Liming Aero-engine Group Corporation Ltd., AVIC, Shenyang 110043, China

Corresponding author:Yang, X.(laser_ceo@opt.cn)

Source title:Applied Mechanics and Materials

Abbreviated source title:Appl. Mech. Mater.

Volume:268

Issue:PART 1

Monograph title:Materials, Mechanical Engineering and Manufacture

Issue date:2013

Publication year:2013

Pages:382-386

Language:English

ISSN:16609336

E-ISSN:16627482

ISBN-13:9783037855799

Document type:Conference article (CA)

Conference name:2nd International Conference on Applied Mechanics, Materials and Manufacturing, ICAMMM 2012

Conference date:November 17, 2012 - November 18, 2012

Conference location:Changsha, China

Conference code:95054

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

Abstract:Based on the femtosecond laser processing technology and PZT driving scanning technology, high-precision micro- manufacturing technology is developed. By adjusting the laser parameters and scanning parameters to get micro-hole machining on the flat or curved surface. Hole's size and surface morphology is observed by using phase contrast microscopy and scanning electron microscopy observations, and the surface roughness is analyzed by the surface profile instrument. The feasibility of diesel injector nozzle processing is verified in practical industry applications. The results show that this method of making micro hole has significant advantages, such as high precision, good consistency, without burrs, good surface roughness and high efficiency. These characteristics can meet the practical application requirements and can be used in various industrial fields. &copy; (2013) Trans Tech Publications, Switzerland.

Number of references:11

Main heading:Lasers

Controlled terms:Industrial applications - Machining - Manufacture - Piezoelectric ceramics - Scanning electron microscopy - Semiconducting lead compounds - Surface roughness - Ultrashort pulses

Uncontrolled terms:Application requirements - Curved surfaces - Diesel injector nozzles - Femtosecond laser processing - High-precision - Industrial fields - Industry applications - Laser parameters - Laser scanning - Lead zirconate titanate  - Manufacturing technologies - Method of processing - Micro holes - Phase-contrast microscopy - PZT - Scanning parameters - Surface profiles

Classification code:931.2 Physical Properties of Gases, Liquids and Solids - 913.4 Manufacturing - 913 Production Planning and Control; Manufacturing - 812.1 Ceramics - 744.1 Lasers, General - 712.1.2 Compound Semiconducting Materials - 604.2 Machining Operations

DOI:10.4028/www.scientific.net/AMM.268-270.382

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 24>

 

Accession number:20133016543308

Title:Design of long-wave infrared scan system with rotating dual-wedge prism

Authors:Fan, Zheyuan (1); Gao, Limin (1); Yang, Hongtao (1); Chen, Weining (1); Cao, Jianzhong (1); Zhang, Jian (1); Zhang, Zhi (1)

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

Source title:Key Engineering Materials

Abbreviated source title:Key Eng Mat

Volume:552

Monograph title:Advances in Optics Manufacture

Issue date:2013

Publication year:2013

Pages:27-32

Language:English

ISSN:10139826

CODEN:KEMAEY

ISBN-13:9783037856918

Document type:Conference article (CA)

Conference name:Asia Pacific Conference on Optics Manufacture 2012, APCOM 2012

Conference date:August 26, 2012 - August 28, 2012

Conference location:Changchun, China

Conference code:97919

Publisher:Trans Tech Publications Ltd, Kreuzstrasse 10, Zurich-Durnten, CH-8635, Switzerland

Abstract:Due to the possession of advantages of passivity working mode, good disguise, and easy observation, infrared systems are used in a wide variety of applications. This paper using 640&times;480 uncooled detector designed a long-wave scan optical system with large field and large aperture working at 8.0&mu;m&sim;12&mu;m, the Pixel Dimensions of the detector is 30&mu;m. The F number of this system is 1.4 and focal length is 17mm, FOV is 63.6&deg;, which extended to 143&deg; by adopting dual-wedge prism rotating, the paper also given the extended field theory by the dual-wedge prism. Because there are a limited number of lens materials used in LWIR spectral bands, Germanium material and three aspheric surfaces were adopted to balance sphere aberrations and chromatic aberration. All above mentioned are intending to ensure the system has good imaging quality. The results show that the optical performance approximates to the diffraction limit and the design has better achromatic performance. The modulation transfer function (MTF) is above 0.5 at spatial frequency of 20lp/mm, energy concentration ratio is greater than 70% within the sensing element of the detector and Root Mean Square (RMS) value of spot diameter is smaller than the Pixel Dimensions. The system has advantages of simple structure, large aperture, high image quality etc. &copy; (2013) Trans Tech Publications, Switzerland.

Number of references:7

Main heading:Aberrations

Controlled terms:Detectors - Diffraction - Image quality - Infrared devices - Manufacture - Optical systems - Optical transfer function - Pixels - Prisms

Uncontrolled terms:Chromatic aberration - Diffraction limits - Energy concentration - High image quality - LWIR - MTF - Optical performance - Root mean square values

Classification code:537.1 Heat Treatment Processes - 723.5 Computer Applications - 741 Light, Optics and Optical Devices - 914 Safety Engineering

DOI:10.4028/www.scientific.net/KEM.552.27

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

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Accession number:20134917058249

Title:Analytical model of amplitude-weighted array technology in forming symmetrical radiation patterns

Authors:Zhong, Lanxiang (1); Zhang, Zhiyong (1); Li, Jianlang (2)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710068, China; (2) Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China

Corresponding author:Li, J.(apuli@siom.ac.cn)

Source title:Chinese Optics Letters

Abbreviated source title:Chin. Opt. Lett.

Volume:11

Issue:8

Issue date:August 2013

Publication year:2013

Article number:080102

Language:English

ISSN:16717694

Document type:Journal article (JA)

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

Abstract:A method on amplitude-weighted array technology is proposed based on an analytical formula in which the radiation amplitudes of array elements are evaluated analytically by a random symmetrical far-field radiation pattern. Using this formula, any desired spatial radiation pattern in the far field could be built by applying the analytical solutions of radiation amplitudes of array elements. To check the validity of this formula as well as the proposed technique, an annular intensity distribution as target far-field pattern is designed, and the respective radiation amplitude of array elements are determined by solving the formula analytically. The available far-field pattern is calculated by applying these solutions and then compared with the target far-field pattern. The theoretical results show the capabilities of the analytical derivation as well as the proposed technique in forming specific radiation patterns. &copy; 2013 Chinese Optics Letters.

Number of references:15

Main heading:Physics

Controlled terms:Optics

Uncontrolled terms:Analytical formulas - Array elements - Far field - Far field radiation patterns - Far-field patterns - Intensity distribution - Radiation amplitude - Spatial radiation

Classification code:741.1 Light/Optics - 931 Classical Physics; Quantum Theory; Relativity - 932 High Energy Physics; Nuclear Physics; Plasma Physics - 933 Solid State Physics

DOI:10.3788/COL201311.080102

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

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Accession number:20124715687932

Title:Heterogeneous image transformation

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

Author affiliation:(1) School of Electronic Engineering, Xidian University, Xi'an 710071, China; (2) Faculty of Engineering and Information Technology, University of Technology, Sydney 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, China

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

Source title:Pattern Recognition Letters

Abbreviated source title:Pattern Recogn. Lett.

Volume:34

Issue:1

Issue date:January 1, 2013

Publication year:2013

Pages:77-84

Language:English

ISSN:01678655

Document type:Journal article (JA)

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

Abstract:Heterogeneous image transformation (HIT) plays an important role in both law enforcements and digital entertainment. Some available popular transformation methods, like locally linear embedding based, usually generate images with lower definition and blurred details mainly due to two defects: (1) these approaches use a fixed number of nearest neighbors (NN) to model the transformation process, i.e.; K-NN-based methods; (2) with overlapping areas averaged, the transformed image is approximately equivalent to be filtered by a low pass filter, which filters the high frequency or detail information. These drawbacks reduce the visual quality and the recognition rate across heterogeneous images. In order to overcome these two disadvantages, a two step framework is constructed based on sparse feature selection (SFS) and support vector regression (SVR). In the proposed model, SFS selects nearest neighbors adaptively based on sparse representation to implement an initial transformation, and subsequently the SVR model is applied to estimate the lost high frequency information or detail information. Finally, by linear superimposing these two parts, the ultimate transformed image is obtained. Extensive experiments on both sketch-photo database and near infrared-visible image database illustrates the effectiveness of the proposed heterogeneous image transformation method. &copy; 2012 Elsevier B.V. All rights reserved.

Number of references:32

Main heading:Mathematical transformations

Controlled terms:Infrared devices - Infrared imaging - Linear transformations

Uncontrolled terms:Digital entertainment - Fixed numbers - High frequency - Image database - Image transformations - Locally linear embedding - Near Infrared - Nearest neighbors - Overlapping area - Recognition rates  - Sparse representation - Support vector regression (SVR) - Transformation methods - Transformation process - Visual qualities

Classification code:741.3 Optical Devices and Systems - 921.3 Mathematical Transformations

DOI:10.1016/j.patrec.2012.04.005

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 27>

 

Accession number:20131116114414

Title:Error characteristics in mutual conversion process of reflective fiber optic current transducer's optical polarization state

Authors:Wang, Lihui (1); He, Zhou (3); Liu, Xixiang (1); Yan, Jie (1); Li, Peijuan (1)

Author affiliation:(1) Southeast University, Nanjing 210096, China; (2) Xian Institute of Optics and Precision Mechanics, Xi'an 710119, China; (3) Henan Pinggao Electric Co. Ltd., Pingdingshan 467001, China

Corresponding author:Wang, L.

Source title:Diangong Jishu Xuebao/Transactions of China Electrotechnical Society

Abbreviated source title:Diangong Jishu Xuebao

Volume:28

Issue:1

Issue date:January 2013

Publication year:2013

Pages:173-178

Language:Chinese

ISSN:10006753

CODEN:DIJXE5

Document type:Journal article (JA)

Publisher:Chinese Machine Press, 1 Nanjie Baiwanzhuang, Beijig, 100037, China

Abstract:Reflective fiber optic current transducer(R-FOCT) is a kind of precision instrument based on optical polarization and optical interference theory. The key optical components in R-FOCT show error characteristics in conversion between linear polarization state and circular polarization state, including quarter-wave retarder, sensing head and mirror, which induces linearly polarized light wave in polarization maintaining fiber and circularly polarized light wave in sensing fiber to be elliptically polarized light wave. Then nonreciprocal phase shift induced by magnetic field of the current is interrupted by wrong polarization state. Focused on polarization error characteristics during mutual conversion process in fiber optic current transducer, optical polarization error models are built by using Jones matrix and Poincare sphere respectively, investigated the influence of several key error factors on measurement accuracy and linearity of scale factor, including phase delay in quarter-wave retarder, birefringence in sensing head and mirror reflection phase shift error. Finally, the proposed methods are verified by simulation test, and scale factor error characteristics of R-FOCT related with optical polarization errors were quantified. The results verify the feasibility of the proposed research scheme.

Number of references:14

Main heading:Light polarization

Controlled terms:Circular polarization - Fiber optics - Mirrors - Models - Phase shift - Phase shifters - Photonics - Polarization - Polarization-maintaining fiber - Transducers

Uncontrolled terms:Circular polarization state - Circularly polarized light - Conversion process - Current transducer - Elliptically polarized light - Error characteristics - Error factors - Jones matrix - Linear polarization - Linearity errors  - Linearly polarized light - Measurement accuracy - Mirror reflections - Nonreciprocal phase shift - Optical components - Phase delay - Poincare sphere - Polarization errors - Polarization state - Precision instrument  - Quarter waves - Scale Factor - Scale factor errors - Sensing fibers - Simulation tests

Classification code:703.1 Electric Networks - 704 Electric Components and Equipment - 715 Electronic Equipment, General Purpose and Industrial - 741 Light, Optics and Optical Devices - 902.1 Engineering Graphics - 942.2 Electric Variables Measurements

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 28>

 

Accession number:20132116361723

Title:Hessian regularized support vector machines for mobile image annotation on the cloud

Authors:Tao, Dapeng (1); Jin, Lianwen (1); Liu, Weifeng (2); Li, Xuelong (3)

Author affiliation:(1) School of Electronic and Information Engineering, South China University of Technology, GuangZhou 510640, Guangdong, China; (2) College of Information and Control Engineering, China University of Petroleum, China; (3) Center for OPTical IMagery Analysis and Learning (OPTIMAL), State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xi'an 710119, Shaanxi, China

Source title:IEEE Transactions on Multimedia

Abbreviated source title:IEEE Trans Multimedia

Volume:15

Issue:4

Issue date:2013

Publication year:2013

Pages:833-844

Article number:6409462

Language:English

ISSN:15209210

CODEN:ITMUF8

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:With the rapid development of the cloud computing and mobile service, users expect a better experience through multimedia computing, such as automatic or semi-automatic personal image and video organization and intelligent user interface. These functions heavily depend on the success of image understanding, and thus large-scale image annotation has received intensive attention in recent years. The collaboration between mobile and cloud opens a new avenue for image annotation, because the heavy computation can be transferred to the cloud for immediately responding user actions. In this paper, we present a scheme for image annotation on the cloud, which transmits mobile images compressed by Hamming compressed sensing to the cloud and conducts semantic annotation through a novel Hessian regularized support vector machine on the cloud. We carefully explained the rationality of Hessian regularization for encoding the local geometry of the compact support of the marginal distribution and proved that Hessian regularized support vector machine in the reproducing kernel Hilbert space is equivalent to conduct Hessian regularized support vector machine in the space spanned by the principal components of the kernel principal component analysis. We conducted experiments on the PASCAL VOC'07 dataset and demonstrated the effectiveness of Hessian regularized support vector machine for large-scale image annotation. &copy; 1999-2012 IEEE.

Number of references:10

Main heading:Support vector machines

Controlled terms:Cloud computing - Image analysis - Image retrieval - Principal component analysis - Semantics

Uncontrolled terms:Intelligent User Interfaces - Kernel principal component analyses (KPCA) - Manifold regularizations - Marginal distribution - Mobile service - Principal Components - Reproducing Kernel Hilbert spaces - Semantic annotations

Classification code:722.4 Digital Computers and Systems - 723 Computer Software, Data Handling and Applications - 741 Light, Optics and Optical Devices - 903.2 Information Dissemination - 922.2 Mathematical Statistics

DOI:10.1109/TMM.2013.2238909

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

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Accession number:20132816484009

Title:Shape recovery from images acquired by a wedge-ring poor-pixels detector

Authors:Wen, Pengcheng (1); Zhang, Yadi (1); Wang, Xiangjun (2); Wei, Hong (3)

Author affiliation:(1) AVIC Computing Technique Research Institute, Xi'an 710119, China; (2) College of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China; (3) School of Systems Engineering, University of Reading, Reading RG6 6AY, United Kingdom

Corresponding author:Wen, P.(victorlionwen@hotmail.com)

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

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

Volume:42

Issue:5

Issue date:May 2013

Publication year:2013

Pages:1366-1371

Language:English

ISSN:10072276

Document type:Journal article (JA)

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

Abstract:A novel wedge-ring poor-pixels photoel ectric detector is valuable for a micro vision system. However an image acquired by the detector has extremely low resolution and it does not reflect the same or similar shape information of an object in the real world. To enable such a detector and its images available in further object identification, a unique shape recovery framework was presented in this paper. By rotating the wedge-ring detector around its center in a sub-wedge range, original low-resolution images were generated. Then linear interpolation along with a least squares method was applied to preliminarily recover the object shape. After noise removal via a two-stage level set evolution with an edge indicator function, the final high-quality object shape was achieved. Experiments demonstrate the effective performance of the proposed algorithms, in which the shape recovery rate is up to 95%.

Number of references:13

Main heading:Detectors

Controlled terms:Computer vision - Least squares approximations - Numerical control systems - Pixels - Shape optimization

Uncontrolled terms:Effective performance - Least squares methods - Level-set evolution - Linear Interpolation - Low resolution images - Object identification - Shape recovery - Wedge-ring image

Classification code:723.5 Computer Applications - 731.1 Control Systems - 731.6 Robot Applications - 914 Safety Engineering - 921.5 Optimization Techniques - 921.6 Numerical Methods

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 30>

 

Accession number:20131616211228

Title:3 W high-power laser passively mode-locked by graphene oxide saturable absorber

Authors:Feng, Chao (1); Wang, Yonggang (2); Liu, Jie (1); Tsang, Yuen H. (2); Song, Yanrong (4); Yu, Zhenhua (4)

Author affiliation:(1) College of Physics and Electronics, Shandong Normal University, Jinan, Shandong 250014, China; (2) Department of Applied Physics, Hong Kong Polytechnic University, Hong Kong, Hong Kong; (3) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (4) Institute of Information Photonics Technology, College of Applied Sciences, Beijing University of Technology, Beijing, China

Corresponding author:Liu, J.(jieliu@sdnu.edu.cn)

Source title:Optics Communications

Abbreviated source title:Opt Commun

Volume:298-299

Issue date:July 1, 2013

Publication year:2013

Pages:168-170

Language:English

ISSN:00304018

CODEN:OPCOB8

Document type:Journal article (JA)

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

Abstract:A novel reflective graphene oxide based saturable absorber is fabricated and used to passively mode locked the Nd:YVO<inf>4</inf> ultrafast laser system. The maximum average output power measured is 3.06 W and the optical to optical conversion efficiency is about 25%. The measured pulse duration and repetition rate are 8.8 ps and 84 MHz. The maximum peak power and the single pulse energy of the mode-locking laser are up to 4.1 kW and 36 nJ, respectively. To the best of our knowledge, it is the highest average output power for the lasers mode locked with graphene based absorbers. &copy; 2013 Elsevier B.V. All rights reserved.

Number of references:21

Main heading:Passive mode locking

Controlled terms:Graphene - Laser mode locking - Mode-locked fiber lasers - Q switched lasers - Saturable absorbers - Ultrafast lasers

Uncontrolled terms:Absorber - Average output power - Graphene oxides - Optical-to-optical conversion efficiencies - Passively mode-locked - Pulse durations - Single pulse energy - Ultrafast laser systems

Classification code:744.1 Lasers, General - 761 Nanotechnology - 804 Chemical Products Generally

DOI:10.1016/j.optcom.2013.02.003

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 31>

 

Accession number:20134216859892

Title:Electromagnetic resonance tunneling in a single-negative sandwich structure

Authors:Kang, Yongqiang (1); Zhang, Chunmin (1); Gao, Peng (1); Ren, Wenyi (1)

Author affiliation:(1) School of Science, Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xian Jiaotong University, Xian 710049, China; (2) Xian Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xian 710048, China; (3) Institute of Solid State Physics, Shanxi Datong University, Datong, Shanxi 037009, China

Corresponding author:Zhang, C.(zcm@mail.xjtu.edu.cn)

Source title:Journal of Modern Optics

Abbreviated source title:J. Mod. Opt.

Volume:60

Issue:13

Issue date:July 1, 2013

Publication year:2013

Pages:1021-1026

Language:English

ISSN:09500340

E-ISSN:13623044

CODEN:JMOPEW

Document type:Journal article (JA)

Publisher:Taylor and Francis Ltd., 4 Park Square, Milton Park, Abingdon, Oxfordshire, OX14 4RN, United Kingdom

Abstract:The electromagnetic wave tunneling phenomenon in a sandwich structure consisting of epsilon-negative (ENG), mu-negative (MNG), and epsilon-negative (ENG) media was investigated. Merging of resonance tunneling modes is demonstrated when the conjugate matched trilayer condition is satisfied. The resonance frequency is found to be independent of the thickness ratio of the matched trilayer structure. The resonance tunneling possesses particular angular-dependent and polarization-free properties. The electric fields corresponding to the frequencies of the resonance modes are found to be strongly localized at just one interface with low transmittance. The possible influence on resonance tunneling due to the losses from the single-negative materials is also investigated. &copy; 2013 Taylor and Francis.

Number of references:17

Main heading:Resonance

Controlled terms:Electric fields - Metamaterials - Sandwich structures

Uncontrolled terms:Electromagnetic optics - Electromagnetic resonance - Electromagnetic-wave tunneling - Epsilon negatives - Resonance frequencies - Resonance tunneling - Single-negative materials - Trilayer structure

Classification code:415 Metals, Plastics, Wood and Other Structural Materials - 701 Electricity and Magnetism - 701.1 Electricity: Basic Concepts and Phenomena - 951 Materials Science

DOI:10.1080/09500340.2013.827251

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

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Accession number:20132216376028

Title:Speckle noise suppression of reconstructed image based on dual-tree complex wavelet and anisotropic diffusion

Authors:Wu, Yiquan (1); Ye, Zhilong (1); Wan, Hong (1)

Author affiliation:(1) College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu 210016, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an, Shaanxi 710068, China

Corresponding author:Wu, Y.(nuaaimage@yahoo.com.cn)

Source title:Zhongguo Jiguang/Chinese Journal of Lasers

Abbreviated source title:Zhongguo Jiguang

Volume:40

Issue:4

Issue date:April 2013

Publication year:2013

Article number:0409002

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 suppress the speckle noise of reconstructed image in digital holography effectively and to further improve the quality of reconstructed image, a speckle noise suppression method of reconstructed image in digital holography based on dual-tree complex wavelet transform (DT-CWT) and anisotropic diffusion is proposed. The reconstructed image is decomposed through DT-CWT. Then, the low-frequency components and the high-frequency components in six directions are processed through P_Laplace diffusion and Laplacian pyramid-based nonlinear diffusion (LPND), respectively. The new reconstructed image is synthesized through inverse dual-tree complex wavelet transform (IDT-CWT). The experimental results are given, and a subjective visual comparison is made with the method of wavelet threshold shrinkage and total variation (TV) diffusion, the method of LPND, and the method combining contourlet transform with TV and adaptive contrast diffusion. While the results are evaluated quantitatively according to peak signal to noise ratio (PSNR), correlation coefficient (COR) and running time. Experimental results show that the proposed method has a better performance in speckle noise suppression and preserves the detail and textural features of original reconstructed image more efficiently.

Number of references:24

Main heading:Image reconstruction

Controlled terms:Computer generated holography - Diffusion - Holography - Laplace transforms - Optical anisotropy - Partial discharges - Speckle - Spurious signal noise

Uncontrolled terms:Dual-tree complex wavelet transform - Dual-tree complex wavelets - High frequency components - Nonlinear diffusion - Peak signal to noise ratio - Quality of reconstructed images - Reconstructed image - Speckle noise

Classification code:921.3 Mathematical Transformations - 746 Imaging Techniques - 743.1 Holographic Techniques - 931.1 Mechanics - 743 Holography - 741 Light, Optics and Optical Devices - 701.1 Electricity: Basic Concepts and Phenomena - 741.1 Light/Optics

DOI:10.3788/CJL201340.0409002

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 33>

 

Accession number:20135117095004

Title:Learning saliency by MRF and differential threshold

Authors:Zhu, Guokang (1); Wang, Qi (1); Yuan, Yuan (1); Yan, Pingkun (1)

Author affiliation:(1) Center for OPTical IMagery Analysis and Learning (OPTIMAL), State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Xi'an 710119, China

Source title:IEEE Transactions on Cybernetics

Abbreviated source title:IEEE Trans. Cybern.

Volume:43

Issue:6

Issue date:December 2013

Publication year:2013

Pages:2032-2043

Article number:6468084

Language:English

ISSN:21682267

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:Saliency detection has been an attractive topic in recent years. The reliable detection of saliency can help a lot of useful processing without prior knowledge about the scene, such as content-aware image compression, segmentation, etc. Although many efforts have been spent in this subject, the feature expression and model construction are far from perfect. The obtained saliency maps are therefore not satisfying enough. In order to overcome these challenges, this paper presents a new psychologic visual feature based on differential threshold and applies it in a supervised Markov-random-field framework. Experiments on two public data sets and an image retargeting application demonstrate the effectiveness, robustness, and practicability of the proposed method. &copy; 2013 IEEE.

Number of references:55

Main heading:Image segmentation

Controlled terms:Computer vision - Learning systems - Markov processes

Uncontrolled terms:Differential threshold - Feature expression - Image retargeting - Markov Random Fields - Model construction - Reliable detection - Saliency detection - Visual Attention

Classification code:723.5 Computer Applications - 731.5 Robotics - 741.1 Light/Optics - 922.1 Probability Theory

DOI:10.1109/TSMCB.2013.2238927

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 34>

 

Accession number:20132916517334

Title:Research of X-ray pulsar navigation simulation source

Authors:Sheng, Li-Zhi (1); Zhao, Bao-Sheng (1); Wu, Jian-Jun (3); Zhou, Feng (1); Song, Juan (1); Liu, Yong-An (1); Shen, Jing-Shi (4); Yan, Qiu-Rong (1); Deng, Ning-Qin (1); Hu, Hui-Jun (4)

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) University of Chinese Academy of Sciences, Beijing 100039, China; (3) Wuxi Institute of Commerce, Wuxi 214153, China; (4) Shandong Aerospace Electro-Technology Institute, Yantai 264670, China

Corresponding author:Sheng, L.-Z.(Lizhi_sheng@opt.ac.cn)

Source title:Wuli Xuebao/Acta Physica Sinica

Abbreviated source title:Wuli Xuebao

Volume:62

Issue:12

Issue date:June 20, 2013

Publication year:2013

Article number:129702

Language:Chinese

ISSN:10003290

CODEN:WLHPAR

Document type:Journal article (JA)

Publisher:Institute of Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing, 100190, China

Abstract:As an autonomous navigation method, X-ray pulsar navigation can provide position, timing and attitude information for various spacecrafts. Since the X-rays (1-20 keV) from the pulsar can not penetrate the earth atmosphere, an X-ray source in laboratory needs to be set up to test and calibrate the detector. In this paper an arbitrary X-ray pulse source to simulate the neutron pulsar signal is proposed. The main components of the simulation source are a grid controlled X-ray tube and arbitrary pulse generation electronics. With the arbitrary pulse voltage applied to the tube grid, the X-ray intensity is controlled. Through electron optics design, the tube electrode parameters are optimized. A grid controlled X-ray tube is fabricated and tested. Using a micro-channel plate detector to detect and reconstruct the generated X-ray pulses, the similarity between the accumulated profile and the original pulsar profile is better than 95%. The frequency stability of the pulsar source emulator is about 2&times;10<sup>-11</sup>. &copy; 2013 Chinese Physical Society.

Number of references:12

Main heading:X rays

Controlled terms:Electromagnetic wave emission - Navigation - Pulse generators - Tubes (components) - X ray tubes

Uncontrolled terms:Arbitrary pulse - Autonomous navigation - Electrode parameters - Grid control - Micro channel plate - Neutron - pulsars - X ray intensity - X-ray pulsars

Classification code:422.1 Strength of Building Materials : Test Equipment - 616.1 Heat Exchange Equipment and Components - 711 Electromagnetic Waves - 713.4 Pulse Circuits - 716.3 Radio Systems and Equipment - 932.1 High Energy Physics

DOI:10.7498/aps.62.129702

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 35>

 

Accession number:20135117093592

Title:Adaptive bad pixel correction algorithm for IRFPA based on PCNN

Authors:Leng, Hanbing (1); Zhou, Zuofeng (1); Cao, Jianzhong (1); Yi, Bo (1); Yan, Aqi (1); Zhang, Jian (1)

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

Corresponding author:Leng, H.(lenghanbing@opt.ac.cn)

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

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8917

Monograph title:MIPPR 2013: Multispectral Image Acquisition, Processing, and Analysis

Issue date:2013

Publication year:2013

Article number:891705

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819498021

Document type:Conference article (CA)

Conference name:8th Symposium on Multispectral Image Processing and Pattern Recognition, MIPPR 2013

Conference date:October 26, 2013 - October 27, 2013

Conference location:Wuhan, China

Conference code:101243

Sponsor:National Key Laboratory of Science and Technology; on Multi-spectral Information Processing; Huazhong University of Science and Technology; The Society of Photo-Optical Instrumentation; Engineers (SPIE)

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

Abstract:Bad pixels and response non-uniformity are the primary obstacles when IRFPA is used in different thermal imaging systems. The bad pixels of IRFPA include fixed bad pixels and random bad pixels. The former is caused by material or manufacture defect and their positions are always fixed, the latter is caused by temperature drift and their positions are always changing. Traditional radiometric calibration-based bad pixel detection and compensation algorithm is only valid to the fixed bad pixels. Scene-based bad pixel correction algorithm is the effective way to eliminate these two kinds of bad pixels. Currently, the most used scene-based bad pixel correction algorithm is based on adaptive median filter (AMF). In this algorithm, bad pixels are regarded as image noise and then be replaced by filtered value. However, missed correction and false correction often happens when AMF is used to handle complex infrared scenes. To solve this problem, a new adaptive bad pixel correction algorithm based on pulse coupled neural networks (PCNN) is proposed. Potential bad pixels are detected by PCNN in the first step, then image sequences are used periodically to confirm the real bad pixels and exclude the false one, finally bad pixels are replaced by the filtered result. With the real infrared images obtained from a camera, the experiment results show the effectiveness of the proposed algorithm. &copy; 2013 SPIE.

Number of references:8

Main heading:Pixels

Controlled terms:Algorithms - Image processing - Infrared imaging - Median filters - Neural networks - Pattern recognition

Uncontrolled terms:Adaptive median filter - Adaptive Median Filter (AMF) - Bad pixels - Compensation algorithm - Correction algorithms - IRFPA - PCNN - Pulse coupled neural network

Classification code:716 Telecommunication; Radar, Radio and Television - 716.1 Information Theory and Signal Processing - 723 Computer Software, Data Handling and Applications - 741 Light, Optics and Optical Devices - 746 Imaging Techniques - 921 Mathematics

DOI:10.1117/12.2032065

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

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Accession number:20130115862016

Title:Visual-textual joint relevance learning for tag-based social image search

Authors:Gao, Yue (1); Wang, Meng (2); Zha, Zheng-Jun (3); Shen, Jialie (4); Li, Xuelong (5); Wu, Xindong (6)

Author affiliation:(1) Department of Automation, Tsinghua University, Beijing 100084, China; (2) Computer Science and Information Engineering Department, Hefei University of Technology, Hefei 230009, China; (3) School of Computing, National University of Singapore, 117417 Singapore, Singapore; (4) School of Information Systems, Singapore Management University, 178902 Singapore, Singapore; (5) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Beijing 100864, China; (6) School of Computer Science and Information Engineering, Hefei University of Technology, Hefei 230009, China; (7) Department of Computer Science, University of Vermont, Burlington, VT 05405, United States

Corresponding author:Gao, Y.

Source title:IEEE Transactions on Image Processing

Abbreviated source title:IEEE Trans Image Process

Volume:22

Issue:1

Issue date:2013

Publication year:2013

Pages:363-376

Article number:6212356

Language:English

ISSN:10577149

CODEN:IIPRE4

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:Due to the popularity of social media websites, extensive research efforts have been dedicated to tag-based social image search. Both visual information and tags have been investigated in the research field. However, most existing methods use tags and visual characteristics either separately or sequentially in order to estimate the relevance of images. In this paper, we propose an approach that simultaneously utilizes both visual and textual information to estimate the relevance of user tagged images. The relevance estimation is determined with a hypergraph learning approach. In this method, a social image hypergraph is constructed, where vertices represent images and hyperedges represent visual or textual terms. Learning is achieved with use of a set of pseudo-positive images, where the weights of hyperedges are updated throughout the learning process. In this way, the impact of different tags and visual words can be automatically modulated. Comparative results of the experiments conducted on a dataset including 370+images are presented, which demonstrate the effectiveness of the proposed approach. &copy; 1992-2012 IEEE.

Number of references:63

Main heading:Estimation

Controlled terms:Image processing - Mathematical models

Uncontrolled terms:Data sets - Hyperedges - Hypergraph - Image search - Learning approach - Learning process - Relevance learning - Research efforts - Research fields - Social media  - tag - Tag-based - Textual information - Visual information - Visual word - visual-textual

Classification code:741 Light, Optics and Optical Devices - 921 Mathematics

DOI:10.1109/TIP.2012.2202676

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

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Accession number:20130415941285

Title:A study of femtosecond laser machining technology applied in air-film holes on turbine blades

Authors:Zhao, Hualong (1); Zhu, Wenyu (1); Yang, Xiaojun (1); Gao, Shifang (2); Zhao, Hongyan (3)

Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) China KeHan Laser(Fujian) Co., Ltd, Putian 351111, China; (3) Xi'an International University, Xi'an 710077, China

Corresponding author:Zhao, H.(laser_pm@opt.cn)

Source title:Applied Mechanics and Materials

Abbreviated source title:Appl. Mech. Mater.

Volume:268

Issue:PART 1

Monograph title:Materials, Mechanical Engineering and Manufacture

Issue date:2013

Publication year:2013

Pages:487-491

Language:English

ISSN:16609336

E-ISSN:16627482

ISBN-13:9783037855799

Document type:Conference article (CA)

Conference name:2nd International Conference on Applied Mechanics, Materials and Manufacturing, ICAMMM 2012

Conference date:November 17, 2012 - November 18, 2012

Conference location:Changsha, China

Conference code:95054

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

Abstract:Femtosecond laser with the features of ultrashort pulse duration and ultrahigh peak power can achieve "cold" machining. The recast layer and micro-cracks of the hole wall can be reduced effectively by applying femtosecond laser in processing air-film holes on turbine blades, and the machining accuracy and consistency of the hole shape will increase. In this paper, the high-speed rotating femtosecond laser beam is adopted in several currently used turbine blade materials for air-film holes machining, and high quality air-film holes without hole wall recast layer and micro-cracks are processed through a large number of experiments to optimize machining technology and technological parameter. &copy; (2013) Trans Tech Publications, Switzerland.

Number of references:8

Main heading:Lasers

Controlled terms:Cracks - Machining - Manufacture - Turbines - Turbomachine blades - Ultrashort pulses

Uncontrolled terms:Air-film hole - Femtosecond laser machining - High quality - Hole walls - Holes machining - Machining Accuracy - Machining technology - Peak power - Recast layer - Technological parameters  - Turbine blade

Classification code:421 Strength of Building Materials; Mechanical Properties - 537.1 Heat Treatment Processes - 604.2 Machining Operations - 612.3 Gas Turbines and Engines - 618 Compressors and Pumps - 744.1 Lasers, General

DOI:10.4028/www.scientific.net/AMM.268-270.487

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

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Accession number:20131416178329

Title:Low-distortion plasmonic slow-light system at telecommunication regime

Authors:Zeng, Chao (1); Cui, Yudong (1)

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

Corresponding author:Zeng, C.(zengchao@opt.cn)

Source title:Optics Communications

Abbreviated source title:Opt Commun

Volume:294

Issue date:May 1, 2013

Publication year:2013

Pages:372-376

Language:English

ISSN:00304018

CODEN:OPCOB8

Document type:Journal article (JA)

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

Abstract:On the basis of an analog of electromagnetically induced transparency (EIT), a metal-insulator-metal (MIM) plasmonic waveguide that has the capacity of realizing slow light with low distortion is proposed and investigated numerically. The transmission line results show that a quite flat dispersion curve with nearly constant group index over a broad bandwidth of 29.64 nm can be achieved by appropriately altering the grating depths. It is found that the group velocity dispersion (GVD) parameter of the proposed structure can approach zero. By means of Finite-Difference Time-Domain (FDTD) simulations, we find that the incident pulse centered at telecommunication regime (i.e., 1550 nm) could be dramatically slowed down with only 2.1% distortion due to the low dispersion. The proposed plasmonic slow-light system may find potential applications for optical buffers and all-optical signal processors in future highly integrated circuits. &copy; 2012 Elsevier B.V.

Number of references:52

Main heading:MIM devices

Controlled terms:Dispersions - Electromagnetic wave polarization - Finite difference time domain method - Group velocity dispersion - Optical waveguides - Plasmons - Quantum optics - Signal processing - Waveguides

Uncontrolled terms:Broad bandwidths - Electromagnetically induced transparency - Finite-difference time-domain simulation - Metal insulator metals - Photonic integrated circuits - Plasmonic waveguides - Signal processor - Surface plasmon polaritons

Classification code:921 Mathematics - 741.1 Light/Optics - 716.1 Information Theory and Signal Processing - 951 Materials Science - 714.3 Waveguides - 712.1 Semiconducting Materials - 711 Electromagnetic Waves - 714.2 Semiconductor Devices and Integrated Circuits

DOI:10.1016/j.optcom.2012.12.037

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

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Accession number:20134216860585

Title:A correction algorithm on reducing energy excursion phenomenon

Authors:Wang, Zheng-Jie (1); Du, Yun-Fei (1); Hu, Bing-Liang (1); Liu, Lei (1); Kong, Liang (1); Yan, Peng (1); Wu, Qi-Jing (1)

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

Corresponding author:Hu, B.-L.(hbl@opt.ac.cn)

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:42

Issue:8

Issue date:August 2013

Publication year:2013

Pages:891-896

Language:English

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

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

Abstract:The imaging principle and the structure of a Hadamard transform spectral imager with a digital micro-mirror device are presented. A phenomenon of energy excursion which is caused by mismatching of the mask unit size and the detector pixel size is expatiated. To fix the recovery images, a matrix correction algorithm is proposed. The 7-order images of plants acquired by the Hadamard transform spectral imager are used and the correction algorithm is operated on the recovery images with error, which reduces the phenomenon of dark stripes effectively. In order to improve the image quality of the recovery images, two dots in and off two adjacent dark stripes are selected to show the spectrum curves. The results show the close spectrum curves of the dot off dark stripes and the different curves of the dot in dark stripes. The comparison illustrates the validity of the correction algorithm.

Number of references:15

Main heading:Algorithms

Controlled terms:Computer aided software engineering - Hadamard transforms - Profilometry - Recovery - Spectroscopy

Uncontrolled terms:Correction algorithms - Correction matrix - Dark stripe - Digital micro-mirror device - Energy excursion - Imaging principle - Matrix correction - Spectrum curves

Classification code:531 Metallurgy and Metallography - 723 Computer Software, Data Handling and Applications - 801 Chemistry - 921 Mathematics - 921.1 Algebra - 943.3 Special Purpose Instruments

DOI:10.3788/gzxb20134208.0891

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

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Accession number:20130916050933

Title:Nondestructive scheme for measuring the attenuation coefficient of polymer optical fiber

Authors:Lin, Xiao (1); Ren, Liyong (1); Liang, Jian (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:Ren, L.(renliy@opt.ac.cn)

Source title:Optics Letters

Abbreviated source title:Opt. Lett.

Volume:38

Issue:4

Issue date:February 15, 2013

Publication year:2013

Pages:528-530

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:Based on the fiber macrobending and the refractive index matching technologies, a measurement scheme is proposed to gauge the attenuation coefficient of polymer optical fibers in this Letter. It is noteworthy that, by realizing both the light injecting into and the light extracting out the fiber core via the fiber cladding, this scheme will not induce any destruction during the whole measurement. Some related experiments and the theoretical verifications are given together with the nondestructive measurement principle. The comparison between the experimental results of this scheme and that of the cut-back scheme indicates a good feasibility of our scheme. As a result, it is promised to have a potential application for achieving the on-line attenuation monitoring that has never been introduced. &copy; 2013 Optical Society of America.

Number of references:11

Main heading:Plastic optical fibers

Controlled terms:Refractive index

Uncontrolled terms:Attenuation coefficient - Cut back - Fiber claddings - Fiber cores - Macro bending - Non destructive - Non-destructive measurement - Potential applications - Refractive index matching

Classification code:741.1 Light/Optics - 741.1.2 Fiber Optics

DOI:10.1364/OL.38.000528

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

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Accession number:20140117166297

Title:Method for measuring dispersion of three projectiles impacting simultaneously

Authors:Dong, Tao (1); Hua, Deng-Xin (1); Li, Yan (1); Ni, Jin-Ping (2)

Author affiliation:(1) School of Mechanical and Precision Instrument Engineering, Xi'an University of Technology, Xi'an 710048, China; (2) School of Opto-Electronic Engineering, Xi'an Technological University, Xi'an 710032, China

Corresponding author:Hua, D.-X.(xauthdx@163.com)

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:42

Issue:11

Issue date:November 2013

Publication year:2013

Pages:1329-1333

Language:Chinese

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

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

Abstract:As for the difficulty of measuring the dispersion of three projectiles impacting simultaneously, a method for measuring coordinate by using a single color linear array CCD camera was presented. A high-speed color linear array CCD camera was used, with red, blue and green sector-like line laser modules as the light source. When passing through the sharing screen of the CCD camera and the light source, the projectiles left projections on the projection board. Meanwhile, the camera captured the images of the projections and projectiles. Then the projection coordinates was identified and calculated by image processing and coordinate computation. By the principle of linear intersection, the impacting coordinates was obtained. The measuring principle and derivation of the measurement formula were described, and the measurement errors were analyzed and simulated. The proposed method, which proves to be effective in measuring the dispersion of three projectiles impacting simultaneously, provides guidance for the development of measuring system for the impacting coordinate of high RF weapons and multi-barrel weapons.

Number of references:13

Main heading:Projectiles

Controlled terms:CCD cameras - Dispersion (waves) - Dispersions - Image processing - Light sources

Uncontrolled terms:Impacting coordinate - Laser modules - Linear array CCD - Linear intersections - Measuring systems - Vertical targets

Classification code:654 Rockets and Rocket Propulsion - 711.1 Electromagnetic Waves in Different Media - 714.2 Semiconductor Devices and Integrated Circuits - 741 Light, Optics and Optical Devices - 744 Lasers - 951 Materials Science

DOI:10.3788/gzxb20134211.1329

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 42>

 

Accession number:20134416920913

Title:Design and implementation of railcar management system based on SSH

Authors:Cheng, Long (1); Ge, Wei (1); Xue, Bin (2)

Author affiliation:(1) The Information Science and Technology Department Northwest University, Xi'an, China; (2) The Space Optical Technology Research Department Xi'an Institute of Optics and Precision Mechanics, Xi'an, China

Source title:Applied Mechanics and Materials

Abbreviated source title:Appl. Mech. Mater.

Volume:416-417

Monograph title:Linear Drives for Industry Applications IX

Issue date:2013

Publication year:2013

Pages:1489-1494

Language:English

ISSN:16609336

E-ISSN:16627482

ISBN-13:9783037858639

Document type:Conference article (CA)

Conference name:9th International Symposium on Linear Drives for Industry Applications, LDIA 2013

Conference date:July 7, 2013 - July 10, 2013

Conference location:Hangzhou, China

Conference code:100437

Sponsor:Zhejiang University; Linear Machines Institute of China Electrotechnical Society (CES); Institute of Electrical Engineering of Chinese Academy of Science

Publisher:Trans Tech Publications Ltd, Kreuzstrasse 10, Zurich-Durnten, CH-8635, Switzerland

Abstract:As the main means of transport, Railcar performs main task of railway equipment repairing department. For managing railcar information better, upgrading the version of the DMI program version, basic data version, revealing data version of GYK on railcar, the paper develops railcar management system which is based on the B/S mode of J2EE lightweight development framework Struts-Spring-Hibernate (SSH). This paper introduces the system design process and every function module in detail. Result proves that railcar management system improves the management efficiency of railcar, consists with the characteristics of the railcar and plays a positive role in the safety of railcar. &copy; (2013) Trans Tech Publications, Switzerland.

Number of references:9

Main heading:Information management

Controlled terms:Digital storage - Industrial applications - Rail motor cars - Repair

Uncontrolled terms:Design and implementations - Development frameworks - GYK - Management efficiency - Railcars - Railway equipments - SSH - System design process

Classification code:682.1.1 Railroad Cars - 722.1 Data Storage, Equipment and Techniques - 903.2 Information Dissemination - 913 Production Planning and Control; Manufacturing - 913.5 Maintenance

DOI:10.4028/www.scientific.net/AMM.416-417.1489

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

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Accession number:20132216376023

Title:Focal length testing method of long focal length laser optical system

Authors:Duan, Yaxuan (1); Chen, Yongquan (1); Zhao, Jianke (1); Li, Kun (1); Tian, Liude (1); Zhang, Jie (1)

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

Corresponding author:Duan, Y.(6216366@163.com)

Source title:Zhongguo Jiguang/Chinese Journal of Lasers

Abbreviated source title:Zhongguo Jiguang

Volume:40

Issue:4

Issue date:April 2013

Publication year:2013

Article number:0408005

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 measure the focal length of long focal length laser optical system, a method based on the principle of autocollimation, using fiber laser, beam splitter, flat mirror, precision angular instrument, charge couple device (CCD) and wavefront sensor is proposed. The fiber pinhole is placed at the focal point of laser optical system by testing the transmission wavefront of laser optical system with the Shack-Hartmann wavefront. Then, the CCD is placed at the best image surface by the scanning focus algorithm. The synchronization acquisition of the angular instrument and CCD is made. The focal length of laser optical system is calculated with the angle got by precision angular instrument and the deviation of pinhole image calculated by the centroid algorithm. The long focal length laser optical system of which the focal length is 7171 mm has been tested by this method. The uncertainty of test result is 13.48 mm (k=2). The test results show that this method is practical to the focal length testing of long focal length laser optical system.

Number of references:17

Main heading:Optical systems

Controlled terms:Fiber lasers - Instruments - Laser mirrors - Laser optics - Measurements - Sensors - Testing - Uncertainty analysis - Wavefronts

Uncontrolled terms:Centroid algorithm - Focal lengths - Laser optical systems - Long focal lengths - Shack-Hartmann wavefront - Synchronization acquisitions - Uncertainty - Wave front sensors

Classification code:944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 941 Acoustical and Optical Measuring Instruments - 922.1 Probability Theory - 801 Chemistry - 741 Light, Optics and Optical Devices - 711 Electromagnetic Waves - 423.2 Non Mechanical Properties of Building Materials: Test Methods

DOI:10.3788/CJL201340.0408005

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

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Accession number:20133416653680

Title:Influence of driving frequency on discharge modes in a dielectric-barrier discharge with multiple current pulses

Authors:Jiang, Weiman (1); Tang, Jie (1); Wang, Yishan (1); Zhao, Wei (1); Duan, Yixiang (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics of CAS, Xi'an 710119, China; (2) Research Center of Analytical Instrumentation, Sichuan University, Chengdu 610064, China

Corresponding author:Tang, J.(tangjie1979@opt.ac.cn)

Source title:Physics of Plasmas

Abbreviated source title:Phys. Plasmas

Volume:20

Issue:7

Issue date:July 2013

Publication year:2013

Article number:073509

Language:English

ISSN:1070664X

CODEN:PHPAEN

Document type:Journal article (JA)

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

Abstract:A one-dimensional self-consistent fluid model was employed to investigate the effect of the driving frequency on the discharge modes in atmospheric-pressure argon discharge with multiple current pulses. The discharge mode was discussed in detail not only at current peaks but also between two adjacent peaks. The simulation results show that different transitions between the Townsend and glow modes during the discharge take place with the driving frequency increased. A complicated transition from the Townsend mode, through glow, Townsend, and glow, and finally back to the Townsend one is found in the discharge with the driving frequency of 8 kHz. There is a tendency of transition from the Townsend to glow mode for the discharge both at the current peaks and troughs with the increasing frequency. The discharge in the half period can all along operate in the glow mode with the driving frequency high enough. This is resulted from the preservation of more electrons in the gas gap and acquisition of more electron energy from the swiftly varying electric field with the increase in driving frequency. Comparison of the spatial and temporal evolutions of the electron density at different driving frequencies indicates that the increment of the driving frequency allows the plasma chemistry to be enhanced. This electrical characteristic is important for the applications, such as surface treatment and biomedical sterilization. &copy; 2013 AIP Publishing LLC.

Number of references:30

Main heading:Glow discharges

Controlled terms:Electric fields

Uncontrolled terms:Argon discharges - Dielectric-barrier discharges - Driving frequencies - Electrical characteristic - Electron energies - Multiple currents - Plasma chemistries - Temporal evolution

Classification code:701.1 Electricity: Basic Concepts and Phenomena

DOI:10.1063/1.4817289

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

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Accession number:20132016327496

Title:Steady-state multiple dark spatial solitons in closed-circuit photovoltaic media

Authors:Zhang, Y.H. (1); Hu, X.H. (2); Lu, K.Q. (2); Liu, B.Y. (1); Liu, W.Y. (1); Guo, R.L. (1)

Author affiliation:(1) Xi'an Technological University, Xi'an, 710032, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academic of Sciences, Xi'an, 710119, China

Corresponding author:Zhang, Y.H.(zhangyh1979@163.com)

Source title:Journal of Optical Technology (A Translation of Opticheskii Zhurnal)

Abbreviated source title:J Opt Technol

Volume:80

Issue:3

Issue date:March 1, 2013

Publication year:2013

Pages:135-141

Language:English

ISSN:10709762

CODEN:JOTEE4

Document type:Journal article (JA)

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

Abstract:We theoretically study the formation of the steady state multiple dark photovoltaic solitons in the closed-circuit photovoltaic photorefractive crystal. The results indicate that the formation of the multiple dark photovoltaic solitons in the closed-circuit photovoltaic crystal is dependent on the initial width of the dark notch at the entrance face of the crystal. The number of the solitons generated increases with the initial width of the dark notch. If the initial width of the dark notch is small, only a fundamental soliton or Y-junction soliton pair is generated. As the initial width of the dark notch is increased, the dark notch tends to split into an odd (or even) number of multiple dark photovoltaic solitons sequence, which realizes a progressive transition from a lower-order soliton to a higher-order solitons sequence. When the multiple solitons are generated, the separations between adjacent dark solitons become slightly smaller. The soliton pairs far away from the center have bigger width and less visibility and they move away from each other as they propagate in the photorefractive nonlinear crystal. &copy; 2013 Optical Society of America.

Number of references:28

Main heading:Solitons

Controlled terms:Photorefractive crystals

Uncontrolled terms:Dark spatial solitons - Fundamental solitons - Higher-order solitons - Nonlinear crystals - Photo-refractive - Photovoltaic crystals - Photovoltaic photorefractive crystal - Photovoltaic soliton

Classification code:741.1.1 Nonlinear Optics - 931.3 Atomic and Molecular Physics

DOI:10.1364/JOT.80.000135

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

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Accession number:20132616445002

Title:A passively Q-switched thulium-doped fiber laser with single-walled carbon nanotubes

Authors:Ma, H.F. (1); Wang, Y.G. (1); Zhou, W. (1); Long, J.Y. (1); Shen, D.Y. (1); Wang, Y.S. (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) Department of Applied Physics, Hong Kong Polytechnic University, Hong Kong, Hong Kong; (3) School of Science, Xi'An Jiaotong University, Xi'an, 710049, China

Source title:Laser Physics

Abbreviated source title:Laser Phys.

Volume:23

Issue:3

Issue date:March 2013

Publication year:2013

Article number:035109

Language:English

ISSN:1054660X

E-ISSN:15556611

Document type:Journal article (JA)

Publisher:Institute of Physics Publishing, Temple Circus, Temple Way, Bristol, BS1 6BE, United Kingdom

Abstract:We demonstrate a passively Q-switched thulium-doped fiber laser by using single-walled carbon nanotube (SWCNT) polyvinyl alcohol (PVA) composite film as the saturable absorber (SA). A relatively large mode area on the SA was employed to avoid damage of the SWCNT/PVA film and benefit pulsed laser operation. Stable pulses of 85-164 kHz repetition rate were generated at 1967 nm with a maximum average output power of 103 mW. The single pulse energy was up to &sim;0.63 &mu;J with &sim;0.87 &mu;s pulse duration. &copy; 2013 Astro Ltd.

Number of references:22

Main heading:Q switching

Controlled terms:Composite films - Fiber lasers - Q switched lasers - Saturable absorbers - Single-walled carbon nanotubes (SWCN) - Thulium

Uncontrolled terms:Average output power - Passively Q-switched - Poly (vinyl alcohol) (PVA) - Pulse durations - Pulsed laser operation - Single pulse energy - Singlewalled carbon nanotube (SWCNT) - Thulium-doped fibers

Classification code:547.2 Rare Earth Metals - 714.2 Semiconductor Devices and Integrated Circuits - 744 Lasers - 761 Nanotechnology

DOI:10.1088/1054-660X/23/3/035109

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 47>

 

Accession number:20134416940661

Title:A real-time image magnificationtechnology based on edge prediction

Authors:Huang, Biao (1); Tian, Yan (1); Yao, Dawei (1); Yang, Xiaojun (1)

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

Corresponding author:Huang, B.(huangbiao336@163.com)

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

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

Volume:42

Issue:SUPPL.1

Issue date:2013

Publication year:2013

Pages:268-273

Language:Chinese

ISSN:10072276

Document type:Journal article (JA)

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

Abstract:To solve the problem of edge blurring and edge jaggingIn image zooming process, a new image magnification algorithm based on edge prediction was proposed. In the algorithm, an image was firstly divided into a few sub-region units and then edges of the magnified image were predicted according to the correlation of the pixels in sub-region units of the original image, from which both the non-edge pixels and the edge pixels of the desired image could be found. Finally, the non-edge pixels and the edge pixels were calculated by liner interpolation in different regions and diagonal interpolation respectively, which effectively suppress the edge blurring and edge jagging. The algorithm could magnify a gray image to any times within limits with acceptable result. After comparing with some other algorithms and testing the practical performance of the algorithm in hardware device it turns out that the algorithm has clear advantages over the other algorithms in terms of quality and the relatively low time complexity which is slightly higher than the time complexity of the bilinear. Consequently, the algorithm can be used for both hardware and software solutions to video image.

Number of references:9

Main heading:Edge detection

Controlled terms:Algorithms - Forecasting - Hardware - Interpolation - Pixels

Uncontrolled terms:Edge blurring - Edge jagging - Hardware and software - Hardware devices - Image magnification - Liner interpolation - Magnified images - Real-time images

Classification code:605 Small Tools and Hardware - 716 Telecommunication; Radar, Radio and Television - 723 Computer Software, Data Handling and Applications - 723.5 Computer Applications - 921 Mathematics - 921.6 Numerical Methods

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 48>

 

Accession number:20131616216202

Title:Femtosecond laser-induced permanent anisotropy in bacteriorhodopsin films and applications in optical data storage

Authors:Yu, Xianghua (1); Yao, Baoli (1); Lei, Ming (1); Gao, Peng (1); Ma, Baiheng (1)

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

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

Source title:Journal of Modern Optics

Abbreviated source title:J. Mod. Opt.

Volume:60

Issue:4

Issue date:February 1, 2013

Publication year:2013

Pages:309-314

Language:English

ISSN:09500340

E-ISSN:13623044

CODEN:JMOPEW

Document type:Journal article (JA)

Publisher:Taylor and Francis Ltd., 4 Park Square, Milton Park, Abingdon, Oxfordshire, OX14 4RN, United Kingdom

Abstract:In polymeric films of bacteriorhodopsin (BR) a photoconversion product named F<inf>540</inf>-state, which is excited by 790 nm femtosecond laser pulses, is stable either for photochemical reaction or thermal pathway. The optical properties of the F<inf>540</inf>-state were studied, and Jones-matrix theory was adopted to analyze the photoinduced anisotropy of the F <inf>540</inf>-state. Based on the permanently photoinduced anisotropy, write-once-read-many (WORM) optical data storage was demonstrated by using two polarization states of femtosecond pulsed laser. Since the polarization information is also written on the storage media, it is impossible to copy it in a common way. This storage technique has a potential application in advanced optical security. &copy; 2013 Copyright Taylor and Francis Group, LLC.

Number of references:16

Main heading:Optical data storage

Controlled terms:Excited states - Optical properties - Photochemical reactions - Polarization - Ultrafast lasers - Ultrashort pulses

Uncontrolled terms:Bacteriorhodopsin - Bacteriorhodopsin (bR) - Bacteriorhodopsin films - Femtosecond pulsed laser - Permanent anisotropy - Photo-induced anisotropy - Polarization state - Write-once-read-many

Classification code:741.1 Light/Optics - 741.3 Optical Devices and Systems - 744.1 Lasers, General - 931.3 Atomic and Molecular Physics

DOI:10.1080/09500340.2013.774067

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

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Accession number:20132416411989

Title:A novel laser gain medium: Micro-sphere array cooled by refractive index-matched coolant

Authors:Gui, Luo (1); Ding, Jianyong (2); She, Jiangbo (3); Peng, Bo (3); Wei, Wei (2); Fan, Dianyuan (1)

Author affiliation:(1) Key Laboratory on High Power Laser and Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Science (CAS), Shanghai 201800, China; (2) Academy of Optoelectronics Engineering, Nanjing University of Posts and Telecommunications, Nanjing, Jiangsu 210046, China; (3) 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; (4) Key Laboratory for Organic Electronics and Information Displays, Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, Nanjing, Jiangsu 210046, China

Corresponding author:Peng, B.(iambpeng@njupt.edu.cn)

Source title:Optics Communications

Abbreviated source title:Opt Commun

Volume:305

Issue date:2013

Publication year:2013

Pages:91-95

Language:English

ISSN:00304018

CODEN:OPCOB8

Document type:Journal article (JA)

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

Abstract:A micro-sphere array laser gain medium cooled by refractive index-matched coolant was demonstrated for the first time to our knowledge. The new concept is possessed of potential to improve thermal management, to increase the thermal load capacity and to build large scale laser medium with small-sized solid laser materials. The feasibility was experimentally proved with an oscillator experiment in which reliable laser output was observed: the maximum output was 113.3 mJ for the pump energy of 765.8 mJ, the threshold was 131.7 mJ and the slope efficiency was 19%. Promising improvement could be achieved by employing methods for maintaining accurate refractive index matching during the lasing process. &copy; 2013 Elsevier B.V.

Number of references:6

Main heading:Refractive index

Controlled terms:Coolants - High power lasers - Pumping (laser) - Solar cell arrays - Spheres - Temperature control

Uncontrolled terms:Gain medium - Large scale lasers - Laser gain medium - Laser materials - Maximum output - Refractive index matching - Slope efficiencies - Thermal load capacity

Classification code:803 Chemical Agents and Basic Industrial Chemicals - 744.1 Lasers, General - 741.1 Light/Optics - 731.3 Specific Variables Control - 631 Fluid Flow - 621 Nuclear Reactors - 615.2 Solar Power

DOI:10.1016/j.optcom.2013.04.072

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

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Accession number:20132616448274

Title:Polarization-dependent optical guiding in low repetition frequency femtosecond laser photowritten type II fused silica waveguides

Authors:Li, Dongjuan (1); Lin, Ling (1); L&#252;, Baida (3); Cheng, Guanghua (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institution of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, Shaanxi 710119, China; (2) University of Chinese Academy of Sciences, Beijing 100049, China; (3) Institute of Laser Physics and Chemistry, Sichuan University, Chengdu, Sichuan 610064, China

Corresponding author:Li, D.(lidongjuan@opt.cn)

Source title:Guangxue Xuebao/Acta Optica Sinica

Abbreviated source title:Guangxue Xuebao

Volume:33

Issue:5

Issue date:May 2013

Publication year:2013

Article number:0532001

Language:Chinese

ISSN:02532239

CODEN:GUXUDC

Document type:Journal article (JA)

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

Abstract:The dependences of self-assembled nanograting in fused silica on low repetition frequency femtosecond laser parameters and scanning parameters are investigated. The results show that the filling factor of nanograting for scanning path cross section depends on the writing parameters. The type II waveguide in fused silica can be written under some writing condition and shows polarization-dependent guiding properties. Similar polarization-dependent guiding properties with 100 kHz situation is proved in experiment by hexagonal structures assembled from type II traces. Ideal models of the cross-sectional refractive index profiles of type II waveguides and the hexagonal structures are constructed. Corresponding modes are simulated using the finite element analysis method. It is found that the polarization-dependent optical guiding properties of type II waveguides are due to polarization-dependent scattering of nanograting rather than form birefringence in theory and experiment.

Number of references:25

Main heading:Polarization

Controlled terms:Experiments - Finite element method - Laser optics - Optical properties - Ultrashort pulses - Waveguides

Uncontrolled terms:Finite element analysis method - Form birefringence - Fused silica waveguides - Hexagonal structures - Nanograting - Refractive index profiles - Repetition frequency - Scanning parameters

Classification code:714.3 Waveguides - 741.1 Light/Optics - 744.1 Lasers, General - 901.3 Engineering Research - 921.6 Numerical Methods

DOI:10.3788/AOS201333.0532001

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 51>

 

Accession number:20134917048378

Title:A multi-focus image fusion method based on image blocks

Authors:Wang, Qi (1); Song, Zongxi (1); Gao, Wei (1); Zhao, Bingjie (1)

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

Corresponding author:Song, Z.(songxi@opt.ac.cn)

Source title:Journal of Information and Computational Science

Abbreviated source title:J. Inf. Comput. Sci.

Volume:10

Issue:16

Issue date:November 1, 2013

Publication year:2013

Pages:5209-5216

Language:English

ISSN:15487741

Document type:Journal article (JA)

Publisher:Binary Information Press, Flat F 8th Floor, Block 3, Tanner Garden, 18 Tanner Road, Hong Kong

Abstract:This paper presents a method for fusing multi-focus images directly based on analyzing image blocks. Firstly, we separate the clear domains and fuzzy domains by setting a threshold value for the average gradients difference of image blocks corresponding. In clear domains, all the pixels are selected directly as the corresponding pixels in the fused image instead of any kind of transform. However, in processing fuzzy domains, we use a fusion method based on the mean gradients of image blocks. The experimental results show that our method is effective and obviously superior to the multi-scale decomposition-based methods such as wavelet transform and wavelet packet transform. &copy; 2013 Binary Information Press.

Number of references:12

Main heading:Image fusion

Controlled terms:Pixels

Uncontrolled terms:Average gradient - Fused images - Fusion methods - Fuzzy domain - Image blocks - Multifocus image fusion - Multifocus images - Wavelet packet transforms

Classification code:723.2 Data Processing and Image Processing - 723.5 Computer Applications

DOI:10.12733/jics20102360

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 52>

 

Accession number:20133216576134

Title:Experimental study of the damage of silicon photoelectric detector materials induced by repetitively-pulsed femtosecond laser

Authors:Cai, Yue (1); Ma, Zhi-Liang (1); Zhang, Zhen (1); Cheng, Guang-Hua (2); Ye, Xi-Sheng (1); Cheng, De-Yan (1)

Author affiliation:(1) State Key Laboratory of Laser Interaction with Matter, Northwest Institute of Nuclear Technology, Xi'an 710024, China; (2) State Key Laboratory of Transient Optics and Photonics, Xian Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710068, China

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

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8796

Monograph title:2nd International Symposium on Laser Interaction with Matter, LIMIS 2012

Issue date:2013

Publication year:2013

Article number:87960I

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819496393

Document type:Conference article (CA)

Conference name:2nd International Symposium on Laser Interaction with Matter, LIMIS 2012

Conference date:September 9, 2012 - September 12, 2012

Conference location:Xi'an, Shaanxi, China

Conference code:97999

Sponsor:Northwest Institute of Nuclear Technology; Mechanics and Physics; Chinese Optical Society; European Laser Institute; The Optical Society

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

Abstract:The experimental setup was established for studying damage effects on silicon photoelectric detector materials induced by 800nm and 150fs repetitively-pulsed laser. The detector is irradiated by single shot and multiple shots respectively. The laser damage thresholds of silicon photoelectric detector material were measured. The surface morphologies of the material damaged by laser were analyzed. The surfaces damaged by laser with different energy were compared. The thresholds vary with the number of laser shots. According to the accumulation theory, the damage threshold is the power function of the shot number. Experimental results show that threshold of single shot that damages the silicon photoelectric detector is 0.156J/cm2. The laser damage threshold decreases with the increasing number of laser pulses, but the minimum value exists. The damage is mainly caused by the mechanical effect rather than thermal effect. In fact, the thermal effect during the interaction is so small that it can't even be observed. Resistivity of the silicon photoelectric detector irradiated by femtosecond laser decreases and finally tends to a constant value. &copy; 2013 SPIE.

Number of references:10

Main heading:Laser damage

Controlled terms:Laser tissue interaction - Photonic devices - Plasma interactions - Silicon - Ultrashort pulses

Uncontrolled terms:Constant values - Damage threshold - Experimental studies - Laser damage threshold - Mechanical effects - Multi-shot - Photoelectric detectors - Power functions

Classification code:712.1.1 Single Element Semiconducting Materials - 717 Optical Communication - 744 Lasers - 932.3 Plasma Physics

DOI:10.1117/12.2011136

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

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Accession number:20133716741518

Title:Synthesis and optical properties of NdF<inf>3</inf> nanocrystals from one source precursor

Authors:Li, Dongdong (1); She, Jiangbo (2); Peng, Bo (2)

Author affiliation:(1) School of Electronic Engineering, Xi'an University of Posts and Telecommunications, Xi'an Shaanxi, 710121, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an Shannxi, 710119, China

Corresponding author:Li, D.(dongdong@opt.ac.cn)

Source title:International Journal of Nanomanufacturing

Abbreviated source title:Int. J. Nanomanufacturing

Volume:9

Issue:3-4

Monograph title:Special Issue on New Energy Materials and Nanotechnology - Part I

Issue date:2013

Publication year:2013

Pages:279-285

Language:English

ISSN:17469392

E-ISSN:17469406

Document type:Conference article (CA)

Publisher:Inderscience Enterprises Ltd., Editorial Office, P O Box 735, Olney, Bucks., MK46 5WB, MK46 5WB, United Kingdom

Abstract:The monodisperse colloidal NdF<inf>3</inf> nanorods were synthesised via one-step thermolysis of Nd(CF<inf>3</inf>COO)<inf>3</inf> 3H<inf>2</inf>O in a hot trioctylphosphine oxide solution. The resulting product was characterised by Fourier transform infrared analysis, transmission electron microscopy and photoluminescence spectroscopy. The rod-like nanocrystals possess well shaped fenestral structures. Optical spectra exhibited the colloidal NdF<inf>3</inf> nanoparitcles possessing typical Nd<sup>3+</sup> 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 was 2.12 &times; 10<sup>-20</sup> cm<sup>2</sup>, and comparable with some laser glasses. Copyright &copy; 2013 Inderscience Enterprises Ltd.

Number of references:15

Main heading:Nanocrystals

Controlled terms:Judd-Ofelt theory - Nanorods - Nanotechnology - Photoluminescence spectroscopy - Transmission electron microscopy

Uncontrolled terms:Emission cross-section - Fluorescence transitions - Fourier transform infra reds - Ion absorption - Laser glass - Mono-disperse - Optical spectra - Trioctylphosphine oxide

Classification code:741.3 Optical Devices and Systems - 761 Nanotechnology - 931.3 Atomic and Molecular Physics - 933 Solid State Physics

DOI:10.1504/IJNM.2013.056053

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 54>

 

Accession number:20141317516360

Title:Design of hybrid refractive-diffractive visible lens with small F-number

Authors:Wang, Hu (1); Luo, Jianjun (1)

Author affiliation:(1) School of Astronautics, Northwestern Polytechnical University, Xi'an 710072, China; (2) Xi'an Institute of Optics and Precision Mechanics, CAS, Xi'an 710119, China

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

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8910

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Imaging Spectrometer Technologies and Applications

Issue date:2013

Publication year:2013

Article number:89100H

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497796

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013  -  June 27, 2013

Conference location:Beijing, China

Conference code:100012

Sponsor:Chinese Society of Astronautics; European Optical Society; The Optical Society; The Society of Photo-Optical Instrumentation Engineers (SPIE)

Publisher:SPIE

Abstract:A hybrid diffractive/refractive visible lens with small F-number of 1.5 is proposed based on the special chromatic aberration of diffractive optical element. It is used in the optical system of visible camera for space debris. The visible lens has an effective focal length of 100 mm, a working wavelength range of 0.5-0.8&mu;m and a field of view 6&deg;. Firstly, the lens system consists of three groups and five lenses. Then, aspheric and diffractive surfaces are used in order to correct high-order aberrations resulting from large relative aperture. Finally, the lens is designed with the help of Code-v optical design software. The lens is evaluated by energy concentration, the dispersion spot diameter, lateral color, distortion, the simulated final design shows adequate image quality. The method puts forward a new ideas for visible camera for space debris optical system design and had an important reference significance and application value. &copy; 2013 SPIE.

Number of references:12

Main heading:Aberrations

Controlled terms:Cameras - Diffractive optics - Optical design - Optical systems

Uncontrolled terms:Aspheric surfaces - Chromatic aberration - Diffractive surfaces - Effective focal lengths - Energy concentration - High-order aberrations - Lens designs - Optical-design software

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

DOI:10.1117/12.2032432

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 55>

 

Accession number:20141317510097

Title:A multi-exposure image fusion method based on wavelet packet transform

Authors:Wang, Qi (1); Song, Zongxi (1); Gao, Wei (1)

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

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

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8907

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Infrared Imaging and Applications

Issue date:2013

Publication year:2013

Article number:89070X

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497765

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013  -  June 27, 2013

Conference location:Beijing, China

Conference code:100012

Sponsor:Chinese Society of Astronautics; European Optical Society; The Optical Society; The Society of Photo-Optical Instrumentation Engineers (SPIE)

Publisher:SPIE

Abstract:This paper presents a method for multi-exposure images fusion based on wavelet packet transform, combining the local energy distributions of multi-exposure images with the edge detection. After decomposing two images involved in fusion into sub images in low-frequency and high-frequency with wavelet packet transform, we use different methods for low-frequency and high-frequency to obtain fusion coefficients. In low frequency processing, the method that threshold value is set for local energy is used while the edge detection method is used in high frequency, where the edge detection operator help compute the information quantity of different high frequency images. Then the coefficients for fusion are selected according to different strategies adopted for low- and high-frequency. Finally, the fusion image is reconstructed through inverse wavelet packet transform. The result shows that the fusion method is effective and the fusion image can preserve the details of the each input image successfully. &copy; 2013 Copyright SPIE.

Number of references:13

Main heading:Image fusion

Controlled terms:Edge detection - Thermography (imaging)

Uncontrolled terms:Edge detection methods - Edge-detection operators - Fusion coefficients - High frequency HF - Information quantity - Local energy - Multi-exposure images - Wavelet packet transforms

Classification code:716 Telecommunication; Radar, Radio and Television - 723.2 Data Processing and Image Processing - 742.1 Photography

DOI:10.1117/12.2031837

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 56>

 

Accession number:20134616972680

Title:Multiring large-mode-area delivery fiber for high power

Authors:Li, Lu (1); Zhang, Aidong (1); Zhan, Huan (1); He, Jianli (1); Shi, Tengfei (1); Zhou, Zhiguang (1); Xiao, Xusheng (1); Lin, Aoxiang (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences (CAS), Xi'an 710119, China; (2) Graduate School of Chinese Academy of Sciences (CAS), Beijing 100049, China

Corresponding author:Lin, A.(aoxiang@opt.ac.cn)

Source title:Applied Optics

Abbreviated source title:Appl. Opt.

Volume:52

Issue:31

Issue date:November 1, 2013

Publication year:2013

Pages:7407-7410

Language:English

ISSN:1559128X

E-ISSN:15394522

CODEN:APOPAI

Document type:Journal article (JA)

Publisher:Optical Society of American (OSA)

Abstract:The study presents a novel design of multiring delivery fiber with large mode area for high power. Using a FiberCAD method, we investigated a fiber whose core is surrounded by alternative low- and high-index rings. Based on our calculation, the effective area is 400 &mu;m<sup>2</sup> at 1.08 &mu;m, larger than the ~280 &mu;m<sup>2</sup> of conventional step-index fiber (20/400). The macrobending loss at 1.08 &mu;m is estimated to be 1 &times; 10<sup>-3</sup> dB/m, approximately one-third that of conventional step-index fiber (20/400). The single-mode operation can be achieved by the macrobending loss contrast between the fundamental mode (&lt;1 dB/m) and high-order mode (&gt;100 dB/m). The results indicate that multiring delivery fiber fabricated by modified chemical vapor deposition process is a promising candidate for high-power transmission. &copy; 2013 Optical Societyof America.

Number of references:25

Main heading:Fibers

Controlled terms:Chemical vapor deposition - Fiber optic sensors

Uncontrolled terms:Fundamental modes - High order mode - High-power transmissions - Large mode area - Macro-bending loss - Modified chemical vapor depositions - Single mode operation - Step-index fibers

Classification code:732.2 Control Instrumentation - 802.2 Chemical Reactions - 812 Ceramics, Refractories and Glass - 817 Plastics and Other Polymers: Products and Applications

DOI:10.1364/AO.52.007407

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 57>

 

Accession number:20141317510098

Title:An improved image fusion algorithm based on wavelet transform

Authors:Duan, Zewei (1); Wen, Desheng (1); Song, Zongxi (1)

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

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

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8907

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Infrared Imaging and Applications

Issue date:2013

Publication year:2013

Article number:89070Y

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497765

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013  -  June 27, 2013

Conference location:Beijing, China

Conference code:100012

Sponsor:Chinese Society of Astronautics; European Optical Society; The Optical Society; The Society of Photo-Optical Instrumentation Engineers (SPIE)

Publisher:SPIE

Abstract:Image fusion takes a significant part in the technology of information enhancement. By analyzing the advantages and disadvantages of previous methods , this paper proposes an improved wavelet-transform-algorithm, which both considers the fusion methods of low-frequency and high-frequency components: On the low-frequency sub-band aspect, introducing a border detector operator in order to collect the border information of images that can be the basis of selective fusion method; On the high-frequency sub-band aspect, applying the local-standard-deviation to being the basis of selective and weighted-averaging fusion method. The experiments reveal that the proposed algorithm contributes to enhancing the definition and contract ratio of the fused images, thereby it's a valid method. &copy; 2013 Copyright SPIE.

Number of references:14

Main heading:Algorithms

Controlled terms:Detectors - Image fusion - Thermography (imaging)

Uncontrolled terms:border information - Fusion methods - High frequency components - High frequency HF - Image fusion algorithms - local-standard-deviation - Low-frequency - wavelet-transform-algorithm

Classification code:723 Computer Software, Data Handling and Applications - 723.2 Data Processing and Image Processing - 742.1 Photography - 914 Safety Engineering - 921 Mathematics

DOI:10.1117/12.2031878

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 58>

 

Accession number:20141117461493

Title:Image super-resolution via non-local steering kernel regression regularization

Authors:Zhang, Kaibing (1); Gao, Xinbo (2); Tao, Dacheng (3); Li, Xuelong (4)

Author affiliation:(1) School of Computer and Information Science, Hubei Engineering University, Xiaogan 432000, China; (2) School of Electronic Engineering, Xidian University, Xi'an 710071, China; (3) QCIS and FEIT, University of Technology, Sydney, NSW 2007, Australia; (4) Xi'An Institute of Optics and Precision Mechanics of CAS, Xi'an 710119, China

Source title:2013 IEEE International Conference on Image Processing, ICIP 2013 - Proceedings

Abbreviated source title:IEEE Int. Conf. Image Process., ICIP - Proc.

Monograph title:2013 IEEE International Conference on Image Processing, ICIP 2013 - Proceedings

Issue date:2013

Publication year:2013

Pages:943-946

Article number:6738195

Language:English

Document type:Conference article (CA)

Conference name:2013 20th IEEE International Conference on Image Processing, ICIP 2013

Conference date:September 15, 2013  -  September 18, 2013

Conference location:Melbourne, VIC, Australia

Conference code:103050

Sponsor:The Institute of Electrical and Electronics Engineers (IEEE) Signal Processing Society

Publisher:IEEE Computer Society

Abstract:In this paper, we employ the non-local steering kernel regression to construct an effective regularization term for the single image super-resolution problem. The proposed method seamlessly integrates the properties of local structural regularity and non-local self-similarity existing in natural images, and solves a least squares minimization problem for obtaining the desired high-resolution image. Extensive experimental results on both simulated and real low-resolution images demonstrate that the proposed method can restore compelling results with sharp edges and fine textures. &copy; 2013 IEEE.

Number of references:10

Main heading:Least squares approximations

Controlled terms:Image processing - Optical resolving power - Regression analysis

Uncontrolled terms:High resolution image - Image super-resolution - Least squares minimization - Local structural regularities - Local structure - Low resolution images - Self-similarities - Steering kernel regressions

Classification code:741 Light, Optics and Optical Devices - 741.1 Light/Optics - 921.6 Numerical Methods - 922.2 Mathematical Statistics

DOI:10.1109/ICIP.2013.6738195

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 59>

 

Accession number:20141317501217

Title:Analysis of terahertz generation characteristic affected by injured photoconductive antenna

Authors:Li, Hui (1); Fan, Wen-Hui (1); Liu, Jia (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 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:8909

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Terahertz Technologies and Applications

Issue date:2013

Publication year:2013

Article number:89090I

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497789

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013  -  June 27, 2013

Conference location:Beijing, China

Conference code:100012

Sponsor:Chinese Society of Astronautics; European Optical Society; The Optical Society; The Society of Photo-Optical Instrumentation Engineers (SPIE)

Publisher:SPIE

Abstract:In this paper, we deployed a home-made THz time-domain system and experimentally investigated the influence of impairment on photoconductive antenna. The low temperature grown GaAs photoconductive antenna (PCA) was used as THz emitter and a &lang;110&rang; ZnTe crystal modulating the probe beam to detect the THz field based on electro-optic sampling. By adjusting the position of laser spot on PCA gap, we found that the generated THz signal was quite different as the laser beam irradiating on different position of the antenna's gap. Moreover, we found that the small burned holes on the edge of both metal electrodes may affect the electric field of the antenna. Furthermore, we simulated the electric field of the PCA with a DC biased voltage applied across the electrodes, and found that the simulation results agreed with the experimental phenomenon, which can well demonstrated that the impairments on the antenna electrodes have a great influence on THz generation. &copy; 2013 Copyright SPIE.

Number of references:18

Main heading:Antennas

Controlled terms:Electric fields - Electrodes - Microwave antennas - Zinc compounds

Uncontrolled terms:Antenna simulations - Electrooptic sampling - Low-temperature-grown GaAs - Metal electrodes - Photoconductive antennas - Position of laser - Terahertz generation - THz generation

Classification code:701.1 Electricity: Basic Concepts and Phenomena - 704.1 Electric Components - 716 Telecommunication; Radar, Radio and Television - 804.1 Organic Compounds

DOI:10.1117/12.2033033

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 60>

 

Accession number:20141317510090

Title:Infrared and visible image fusion based on region growing and contourlet transform

Authors:Zhao, Bingjie (1); Gao, Wei (1); Song, Zongxi (1)

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

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

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8907

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Infrared Imaging and Applications

Issue date:2013

Publication year:2013

Article number:89070P

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497765

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013  -  June 27, 2013

Conference location:Beijing, China

Conference code:100012

Sponsor:Chinese Society of Astronautics; European Optical Society; The Optical Society; The Society of Photo-Optical Instrumentation Engineers (SPIE)

Publisher:SPIE

Abstract:According to the characteristics of infrared and visible images, a new image fusion method based on region growing and contourlet transform is proposed in this paper. To obtain more complementary information, the method is designed as a two-stage procedure. Firstly, the input infrared image is processed with region growing to segment the thermal target. Different fusion rules are adopted in target and background regions, respectively. For the target region, local energy is utilized as the fusion rule of the first fusion to fuse the thermal target and the visible image, while for the non-target region, we reserve the visible background information. Secondly, in order to fully add original information of the source images and avoid loss of information caused by segmentation, we make the second fusion between the visible image and the result image of the one-stage fusion. For good properties of localization, directionality and anisotropy, we adopt contourlet transform as the second fusion method. Experiments are carried out and the results show that our method is clearer in visual quality and effective in quantitative evaluations and the fused images are better than those resulting of using wavelet transform and contourlet transform. &copy; 2013 Copyright SPIE.

Number of references:13

Main heading:Image fusion

Controlled terms:Image segmentation - Infrared imaging - Thermography (imaging)

Uncontrolled terms:Background information - Contourlet transform - Image fusion methods - Infrared and visible image - Quantitative evaluation - Region growing - Target and background - Visible image

Classification code:723.2 Data Processing and Image Processing - 742.1 Photography - 746 Imaging Techniques

DOI:10.1117/12.2031627

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 61>

 

Accession number:20141117463717

Title:Image fusion based on non-negative matrix factorization and infrared feature extraction

Authors:Mou, Jiao (1); Gao, Wei (1); Song, Zongxi (1)

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

Source title:Proceedings of the 2013 6th International Congress on Image and Signal Processing, CISP 2013

Abbreviated source title:Proc. Int. Congr. Image Signal Process., CISP

Volume:2

Monograph title:Proceedings of the 2013 6th International Congress on Image and Signal Processing, CISP 2013

Issue date:2013

Publication year:2013

Pages:1046-1050

Article number:6745210

Language:English

Document type:Conference article (CA)

Conference name:2013 6th International Congress on Image and Signal Processing, CISP 2013

Conference date:December 16, 2013  -  December 18, 2013

Conference location:Hangzhou, China

Conference code:103106

Publisher:IEEE Computer Society

Abstract:A new effective fusion method based on non-negative matrix factorization (NMF) and infrared target extraction is presented for infrared and visible images fusion. The two source images are taken as original data in NMF analysis, from which the feature base containing the global features of the source images can be extracted. The feature base image is replaced by the adjusted visible image, which is histogram matched with the raw feature base. As non-negative matrix factorization image fusion algorithm lacks details, we introduce a local gradient as an active measure, and combine weighting and selection methods to fuse the visible image with the feature base image. Then the target regions from infrared image are segmented through edge detection, region growing and morphological processing methods. The segmented target regions are fused with the background regions of the feature base image. Experiment indicates that the proposed method is simple in calculation. And it can retain texture details of visible image, highlight the thermal target of infrared image and enhance the readability of source images. &copy; 2013 IEEE.

Number of references:12

Main heading:Image processing

Controlled terms:Edge detection - Factorization - Feature extraction - Image fusion - Infrared imaging

Uncontrolled terms:Background region - Feature base - Image fusion algorithms - Infrared and visible image - Infrared features - Morphological processing - Nonnegative matrix factorization - Selection methods

Classification code:716 Telecommunication; Radar, Radio and Television - 723.2 Data Processing and Image Processing - 746 Imaging Techniques - 921 Mathematics

DOI:10.1109/CISP.2013.6745210

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 62>

 

Accession number:20141317510150

Title:A new algorithm of inter-frame filtering in IR image based on threshold value

Authors:Liu, Wei (1); Leng, Hanbing (1); Chen, Weining (1); Yang, Hongtao (1); Xie, Qingsheng (1); Yi, Bo (1); Zhang, Haifeng (1)

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

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

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8907

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Infrared Imaging and Applications

Issue date:2013

Publication year:2013

Article number:89072N

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497765

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013  -  June 27, 2013

Conference location:Beijing, China

Conference code:100012

Sponsor:Chinese Society of Astronautics; European Optical Society; The Optical Society; The Society of Photo-Optical Instrumentation Engineers (SPIE)

Publisher:SPIE

Abstract:This paper proposed a new algorithm of inter-frame filtering in IR image based on threshold value for the purpose of solving image blur and smear brought by traditional inter-frame filtering algorithm. At first, it finds out causes of image blur and smear by analyzing general inter-frame filtering algorithm and dynamic inter-frame filtering algorithm, hence to bring up a new kind of time-domain filter. In order to obtain coefficients of the filter, it firstly gets difference image of present image and previous image, and then, it gets noisy threshold value by analyzing difference image with probability analysis method. The relationship between difference image and threshold value helps obtaining the coefficients of filter. At last, inter-frame filtering method is adopted to process pixels interrupted by noise. The experimental result shows that this algorithm has successfully repressed IR image blur and smear, and NETD tested by traditional inter filtering algorithm and the new algorithm are respectively 78mK and 70mK, which shows it has a better noise reduction performance than traditional ones. The algorithm is not only applied to still image, but also to sports image. As a new algorithm with great practical value, it is easy to achieve on FPGA, of excellent real-time performance and it effectively extends application scope of time domain filtering algorithm. &copy; 2013 Copyright SPIE.

Number of references:8

Main heading:Algorithms

Controlled terms:Infrared imaging - Signal filtering and prediction - Thermography (imaging) - Time domain analysis

Uncontrolled terms:Blurring - Inter-frame - IR camera - Noise - Smearing - Time domain

Classification code:723 Computer Software, Data Handling and Applications - 731.1 Control Systems - 742.1 Photography - 746 Imaging Techniques - 921 Mathematics

DOI:10.1117/12.2033067

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 63>

 

Accession number:20141317501178

Title:Theoretical and experimental study on methods for increasing squeezed level in the generation of squeezed light

Authors:Feng, Fei (1); Qu, Wen-Yan (1); Song, Jia-Zheng (1); Zhang, Tong-Yi (1)

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

Corresponding author:Zhang, T.-Y.(tyzhang@opt.ac.cn)

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

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8906

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Laser Communication Technologies and Systems

Issue date:2013

Publication year:2013

Article number:89061W

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497758

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013  -  June 27, 2013

Conference location:Beijing, China

Conference code:100012

Sponsor:Chinese Society of Astronautics; European Optical Society; The Optical Society; The Society of Photo-Optical Instrumentation Engineers (SPIE)

Publisher:SPIE

Abstract:We demonstrate the methods for increasing the observed squeezing level in the generation of squeezed states of light at 1064 nm with periodically poled KTiOPO<inf>4</inf> (PPKTP) crystal. We analyze the technical limits to the reduction of noise in the squeezed quadrature theoretically, including the intra-cavity loss of the optical parametric amplifier (OPA) cavity, the normalized amplitude, the detection frequency, and the mode matching on the balanced homodyning stage. To observe a high degree of squeezing, we improve the quality of mode matching into the OPA cavity and the mode cleaning (MC) cavity experimentally. By optimizing mode matching of the light into cavities, the finesse of the cavities would be higher in practice and the desirable spatial mode can be realized. As the intensity noise of the laser light reach the shot noise limit above the frequency of 1 MHz, which is sufficient for our experiment, so the MC cavity is incorporated to filter higher-order transverse modes of the local oscillator (LO) beam for the balanced homodyne detection. The experimental and theoretical results show that it is essential to optimize the mode matching efficiency to generate and detect high degree of squeezing otherwise an inefficiency mode matching will throw away the squeezing and transform the squeezed field into a vacuum field. &copy; 2013 Copyright SPIE.

Number of references:10

Main heading:Optimization

Controlled terms:Homodyne detection - Light amplifiers - Optical parametric amplifiers - Squeezed light

Uncontrolled terms:Balanced homodyne detection - Detection frequency - Local oscillators - Mode matching - Optical parametric amplifiers (OPA) - Periodically poled - Squeezed level - Technical limits

Classification code:714 Electronic Components and Tubes - 714.2 Semiconductor Devices and Integrated Circuits - 716.1 Information Theory and Signal Processing - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 921.5 Optimization Techniques

DOI:10.1117/12.2034574

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 64>

 

Accession number:20142017710723

Title:Mid-infrared fluorescence of Ho-doped water-free fluorotellurite glasses

Authors:He, Jianli (1); Zhan, Huan (1); Zhou, Zhiguang (1); Zhang, Aidong (1); Lin, Aoxiang (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences (CAS), Xi'an 710119, China; (2) Graduate School of Chinese Academy of Sciences, Beijing 100049, China

Corresponding author:Lin, A.(aoxiang@opt.ac.cn)

Source title:Asia Communications and Photonics Conference, ACP

Abbreviated source title:Asia Commun. Photonics Conf.

Monograph title:Asia Communications and Photonics Conference, ACP 2013

Issue date:2013

Publication year:2013

Language:English

ISSN:2162108X

ISBN-13:9781557529893

Document type:Conference article (CA)

Conference name:Asia Communications and Photonics Conference, ACP 2013

Conference date:November 12, 2013  -  November 15, 2013

Conference location:Beijing, China

Conference code:104975

Publisher:Optical Society of America

Abstract:Ho<sup>3+</sup>-doped water-free fluorotellurite glasses and fiber canes were reported. Comparable long fluorescence lifetimes of 0.81 ms at 2.85 &mu;m and 10.01 ms at 2.04 &mu;m were obtained. &copy; OSA 2013.

Number of references:5

Main heading:Photonics

Controlled terms:Fluorescence - Glass

Uncontrolled terms:Fluorescence lifetimes - Fluoro-tellurite glass - Midinfrared

Classification code:741.1 Light/Optics - 812.3 Glass

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 65>

 

Accession number:20135217123256

Title:A novel compensation fiber coil for eliminating Sagnac Effect in fiber optic current sensor

Authors:Wang, Yingli (1); Kang, Menghua (1); Ren, Liyong (1); Ren, Kaili (1); Xu, Jintao (1); Shi, Nianbao (1)

Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) University of Chinese Academy of Sciences, Beijing, 100049, China; (3) Xi'An Sino Huaxin Measurement and Control Co., Ltd, China

Source title:Chinese Control Conference, CCC

Abbreviated source title:Chinese Control Conf., CCC

Monograph title:Proceedings of the 32nd Chinese Control Conference, CCC 2013

Issue date:October 18, 2013

Publication year:2013

Pages:7473-7476

Article number:6640753

Language:English

ISSN:19341768

E-ISSN:21612927

ISBN-13:9789881563835

Document type:Conference article (CA)

Conference name:32nd Chinese Control Conference, CCC 2013

Conference date:July 26, 2013  -  July 28, 2013

Conference location:Xi'an, China

Conference code:103692

Publisher:IEEE Computer Society, 2001 L Street N.W., Suite 700, Washington, DC 20036-4928, United States

Abstract:In Sagnac interferometer fiber optics current sensor, errors from the residual linear birefringence and environmental temperature and vibration sensitity has severely influenced on accuracy of this sensor. Spun highly linearly birefringent fiber has intrinsic sensitivity to magnetic fields through the Faraday Effect which result in simplification of optical element. The absence of the quarter wave plate result in good temperature performance and reducing light loss for less splice points. In this manuscript, the spun highly linearly birefringent fiber was designed and the vibration insensitive Sagnac interferometer fiber optics current sensor (S-FOCS) scheme was set up. In this scheme, the compensation fiber coil was designed to compensate the error caused by Sagnac effect in sensing fiber coil. Therefore, it is vibration immunity Sagnac interferometer fiber optics current sensor. The theoretical modeling of the state of light polarization was built by Jones Matrix. The results demonstrated that this novel sensor have good performance of conductor position insensitivity, temperature stability and vibration immunity. &copy; 2013 TCCT, CAA.

Number of references:17

Main heading:Fibers

Controlled terms:Fiber optic sensors - Fiber optics - Light polarization - Sensors - Spinning (fibers)

Uncontrolled terms:Fiber coil - Fiber-optic current sensor - Jones matrix - Sagnac effect - Spun fiber

Classification code:741.1 Light/Optics - 741.1.2 Fiber Optics - 801 Chemistry - 812 Ceramics, Refractories and Glass - 817 Plastics and Other Polymers: Products and Applications - 819.3 Fiber Chemistry and Processing

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 66>

 

Accession number:20134917058257

Title:Suppression of the fluctuation effect in terahertz imaging using homomorphic filtering

Authors:Xu, Limin (1); Fan, Wenhui (1); Liu, Jia (1)

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

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

Source title:Chinese Optics Letters

Abbreviated source title:Chin. Opt. Lett.

Volume:11

Issue:8

Issue date:August 2013

Publication year:2013

Article number:081201

Language:English

ISSN:16717694

Document type:Journal article (JA)

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

Abstract:To suppress the fluctuation effect due to laser power instability and terahertz radiation fluctuation, a homomorphic filtering method is proposed to process the terahertz images obtained from a pulsed terahertz raster scanning imaging system. The physical model of homomorphic filtering for terahertz imaging is established. The mathematical expressions are given with the specific physical meaning in accordance with the imaging principle. To demonstrate the effectiveness of the method, a homomorphic filtering experiment based on two raw terahertz images selected from the literature using a continuous-wave (CW) terahertz source is also performed. The effect of the method is compared with those described in the literature, and the advantages of homomorphic filtering are discussed. The pulsed- and CW-terahertz image processing results both show that in addition to suppressing the fluctuation effect, the method can also enhance target imaging. &copy; 2013 Chinese Optics Letters.

Number of references:20

Main heading:Laser optics

Controlled terms:Image processing

Uncontrolled terms:Continuous-wave terahertz sources - Homomorphic filtering - Imaging principle - Mathematical expressions - Physical meanings - Raster scanning - Terahertz imaging - Terahertz radiation

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

DOI:10.3788/COL201311.081201

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 67>

 

Accession number:20133416640460

Title:Pedestrian detection in unseen scenes by dynamically updating visual words

Authors:Cao, Xianbin (1); Wang, Li (1); Ning, Bo (2); Yuan, Yuan (3); Yan, Pingkun (3)

Author affiliation:(1) Beihang University, Beijing 100191, China; (2) University of Science and Technology of China, Hefei 230026, China; (3) Center for OPTical IMagery Analysis and Learning (OPTIMAL), State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, Shaanxi, China

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

Source title:Neurocomputing

Abbreviated source title:Neurocomputing

Volume:119

Issue date:November 7, 2013

Publication year:2013

Pages:232-242

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:Adapting trained detectors to unseen scenes is a critical problem in pedestrian detection. The performance of trained detector may drop quickly when scenes vary significantly. Retraining a detector with labeled samples from the new scenes may improve its performance. However, it is difficult to obtain enough labeled samples in real applications. In this paper, a novel bag of visual words based method is proposed to detect pedestrians in unseen scenes by dynamically updating the key words. The proposed method achieves its adaptability by using three strategies covering key word selection, detector invariance, and codebook update: (1) In order to select typical words representing pedestrians, a low dimensional model of visual words is built to describe their distribution and select key words using manifold learning. (2) Matching confidence vector (MCV), a novel visual words measurement is proposed, which aims to generate a uniform input vector for the fixed detector applied to different pedestrian codebooks. (3) When detecting pedestrians under changing road conditions, the key word set will be dynamically adjusted according to the matching frequency of each word to adapt the detector to the new scenes. By employing the above strategies, the proposed method is able to detect pedestrians in different scenes without retraining the detector. Experiments in different scenes showed that our proposed method can achieve better adaptability to various scenes and get better performance than other existing methods in unseen scenes. &copy; 2013 Elsevier B.V.

Number of references:41

Main heading:Detectors

Controlled terms:Computer applications - Neural networks

Uncontrolled terms:Adaptive detectors - Bag-of-visual-words - Better performance - Low-dimensional models - Manifold leaning - Matching confidences - Matching frequency - Pedestrian detection

Classification code:723.4 Artificial Intelligence - 723.5 Computer Applications - 914 Safety Engineering

DOI:10.1016/j.neucom.2013.03.036

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 68>

 

Accession number:20133316611695

Title:Enhanced luminescence properties of monodisperse trioctylphosphine oxide-capped Nd<sup>3+</sup>-doped LaF<inf>3</inf> nanorods without OH groups

Authors:Cui, Xiaoxia (1); Guo, Haitao (1); Hou, Chaoqi (1); Gao, Fei (1); Wang, Zhongyue (2); 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) Institute of Advanced Materials, Nanjing University of Posts and Telecommunications, Nanjing 210003, China

Corresponding author:Cui, X.(cuixx@opt.ac.cn)

Source title:Colloids and Surfaces A: Physicochemical and Engineering Aspects

Abbreviated source title:Colloids Surf. A Physicochem. Eng. Asp.

Volume:436

Issue date:September 5, 2013

Publication year:2013

Pages:386-391

Language:English

ISSN:09277757

E-ISSN:18734359

CODEN:CPEAEH

Document type:Journal article (JA)

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

Abstract:Nd<sup>3+</sup>-doped LaF<inf>3</inf> nanorods without -OH groups were synthesized via a simple thermolysis method in trioctylphosphine oxide (TOPO) solvent. FTIR spectrum indicates that TOPO molecules have been coordinated to LaF<inf>3</inf>:Nd nanorods surface, which reduce the number of -OH groups on the nanoparticles surface effectively. The structure and morphology of as-synthesized nanorods were characterized. The possible grow mechanism of LaF<inf>3</inf>:Nd nanorods has been also discussed in detail. The TOPO capped LaF<inf>3</inf>:Nd nanoparticles preferentially grow along the &lt;0001&gt; orientation under high temperature. Based on the absorption spectra and Judd-Ofelt theory, higher value of emission cross-section for <sup>4</sup>F<inf>3/2</inf>&rarr<sup>4</sup>I<inf>11/2</inf> transition of Nd<sup>3+</sup> was calculated to be 3.22&times;10<sup>-20</sup>cm<sup>2</sup>. The strong fluorescence intensity of LaF<inf>3</inf>:Nd nanorods in chloroform demonstrates that these nanorods are promising luminescence materials. &copy; 2013 Elsevier B.V.

Number of references:20

Main heading:Nanorods

Controlled terms:Luminescence - Nanoparticles - Surface treatment

Uncontrolled terms:Emission cross-section - Enhanced luminescence - Fluorescence intensities - Luminescence material - Structure and morphology - Topo - Trioctylphosphine oxide - Trioctylphosphines

Classification code:933 Solid State Physics - 931 Classical Physics; Quantum Theory; Relativity - 802 Chemical Apparatus and Plants; Unit Operations; Unit Processes - 761 Nanotechnology - 741.1 Light/Optics - 708 Electric and Magnetic Materials - 539 Metals Corrosion and Protection; Metal Plating

DOI:10.1016/j.colsurfa.2013.07.009

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 69>

 

Accession number:20131616216353

Title:Sparse coding from a bayesian perspective

Authors:Lu, Xiaoqiang (1); Wang, Yulong (1); Yuan, Yuan (1)

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 710119, China; (2) Faculty of Mathematics and Computer Science, Hubei University, Wuhan 430062, China

Corresponding author:Lu, X.(luxiaoqiang@opt.ac.cn)

Source title:IEEE Transactions on Neural Networks and Learning Systems

Abbreviated source title:IEEE Trans. Neural Networks Learn. Sys.

Volume:24

Issue:6

Issue date:2013

Publication year:2013

Pages:929-939

Article number:6472078

Language:English

ISSN:2162237X

E-ISSN:21622388

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:Sparse coding is a promising theme in computer vision. Most of the existing sparse coding methods are based on either &ell;<inf>0</inf> or &ell;<inf>1</inf> penalty, which often leads to unstable solution or biased estimation. This is because of the nonconvexity and discontinuity of the &ell;<inf>0</inf> penalty and the over-penalization on the true large coefficients of the &ell;<inf>1</inf> penalty. In this paper, sparse coding is interpreted from a novel Bayesian perspective, which results in a new objective function through maximum a posteriori estimation. The obtained solution of the objective function can generate more stable results than the &ell;<inf>0</inf> penalty and smaller reconstruction errors than the &ell;<inf>1</inf> penalty. In addition, the convergence property of the proposed algorithm for sparse coding is also established. The experiments on applications in single image super-resolution and visual tracking demonstrate that the proposed method is more effective than other state-of-the-art methods. &copy; 2012 IEEE.

Number of references:39

Main heading:Computer networks

Controlled terms:Artificial intelligence - Computer vision

Uncontrolled terms:Bayesian - Compressive sensing - Convergence properties - Maximum a posteriori - Maximum a posteriori estimation - Reconstruction error - Sparse coding - State-of-the-art methods

Classification code:716 Telecommunication; Radar, Radio and Television - 717 Optical Communication - 718 Telephone Systems and Related Technologies; Line Communications - 722 Computer Systems and Equipment - 723 Computer Software, Data Handling and Applications

DOI:10.1109/TNNLS.2013.2245914

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 70>

 

Accession number:20134016817716

Title:Key technologies research of new generation concentrating photovoltaic

Authors:Liu, Chun Tong (1); Bing, Li (1); Tao, Wang (2); Li, Hong Cai (1)

Author affiliation:(1) High-Tech Institute of Xi'an, Shaanxi, 710025, China; (2) Xi'an institute of optics and precision mechanics of CAS, Shaanxi, 710119, China

Source title:Advanced Materials Research

Abbreviated source title:Adv. Mater. Res.

Volume:724-725

Monograph title:Applied Energy Technology

Issue date:2013

Publication year:2013

Pages:171-175

Language:English

ISSN:10226680

ISBN-13:9783037857410

Document type:Conference article (CA)

Conference name:2013 2nd International Conference on Energy and Environmental Protection, ICEEP 2013

Conference date:April 19, 2013 - April 21, 2013

Conference location:Guilin, China

Conference code:99790

Publisher:Trans Tech Publications Ltd, Kreuzstrasse 10, Zurich-Durnten, CH-8635, Switzerland

Abstract:The new concentrating photovoltaic (CPV) with core technology of III-V multi-junction cells, can significantly reduce the cost of photovoltaic system, and with advantages of high conversion rate, light weight, small size, energy saving and environmental protection, etc, which was widely regarded as the next-generation of solar photovoltaic technology. On the basis of the introduction of related research process, the paper concentrating discuss on the key technologies such as the new efficient multi-junction cells, high performance non-imaging concentrated light technology and sun tracking system, and propose the appropriate technical solutions, which can provide reference for the application and dissemination of the new generation concentrating photovoltaic. &copy; (2013) Trans Tech Publications, Switzerland.

Number of references:8

Main heading:Technology

Controlled terms:Photovoltaic cells - Solar cells - Solar power generation

Uncontrolled terms:Concentrating photovoltaic - Energy saving and environmental protection - Key technologies - Multi-junction cells - Photovoltaic systems - Solar photovoltaic technology - Sun tracking systems - Technical solutions

Classification code:615.2 Solar Power - 702.3 Solar Cells - 741.3 Optical Devices and Systems - 901 Engineering Profession

DOI:10.4028/www.scientific.net/AMR.724-725.171

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 71>

 

Accession number:20135117094997

Title:LDFT-based watermarking resilient to local desynchronization attacks

Authors:Tian, Huawei (1); Zhao, Yao (3); Ni, Rongrong (1); Qin, Lunming (1); Li, Xuelong (4)

Author affiliation:(1) Institute of Information Science, Beijing Jiaotong University, Beijing, China; (2) Beijing Key Laboratory of Advanced Information Science and Network Technology, Beijing 100044, China; (3) Institute of Information Science, Beijing Jiaotong University, State Key Laboratory of Rail Traffic Control and Safety, Beijing 100044, China; (4) Center for OPTical IMagery Analysis and Learning (OPTIMAL), State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Xi'an 710119, Shaanxi, China

Source title:IEEE Transactions on Cybernetics

Abbreviated source title:IEEE Trans. Cybern.

Volume:43

Issue:6

Issue date:December 2013

Publication year:2013

Pages:2190-2201

Article number:6486549

Language:English

ISSN:21682267

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:Up to now, a watermarking scheme that is robust against desynchronization attacks (DAs) is still a grand challenge. Most image watermarking resynchronization schemes in literature can survive individual global DAs (e.g., rotation, scaling, translation, and other affine transforms), but few are resilient to challenging cropping and local DAs. The main reason is that robust features for watermark synchronization are only globally invariable rather than locally invariable. In this paper, we present a blind image watermarking resynchronization scheme against local transform attacks. First, we propose a new feature transform named local daisy feature transform (LDFT), which is not only globally but also locally invariable. Then, the binary space partitioning (BSP) tree is used to partition the geometrically invariant LDFT space. In the BSP tree, the location of each pixel is fixed under global transform, local transform, and cropping. Lastly, the watermarking sequence is embedded bit by bit into each leaf node of the BSP tree by using the logarithmic quantization index modulation watermarking embedding method. Simulation results show that the proposed watermarking scheme can survive numerous kinds of distortions, including common image-processing attacks, local and global DAs, and noninvertible cropping. &copy; 2013 IEEE.

Number of references:46

Main heading:Image watermarking

Controlled terms:Binary trees - Computer crime - Digital watermarking - Forestry - Watermarking

Uncontrolled terms:Binary space partitioning trees - De-synchronization attacks - Feature transform - Quantization index modulation - Robust - Watermark synchronization - Watermarking embedding - Watermarking schemes

Classification code:723 Computer Software, Data Handling and Applications - 723.2 Data Processing and Image Processing - 811.1.1 Papermaking Processes - 821.0 Woodlands and Forestry

DOI:10.1109/TCYB.2013.2245415

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 72>

 

Accession number:20140317201777

Title:An enhanced infrared and visible image fusion method based on wavelet transform

Authors:Xu, Fan (1); Su, Xiuqin (1)

Author affiliation:(1) Key Laboratory of Ultrafast Photoelectric Diagnostics Technology, Xi'an Institute of Optics and Precision, CAS, Xi'an 710119, China; (2) Univerity of CAS, Beijing, 100049, China

Source title:Proceedings - 2013 5th International Conference on Intelligent Human-Machine Systems and Cybernetics, IHMSC 2013

Abbreviated source title:Proc. - Int. Conf. Intelligent Hum.-Mach. Syst. Cybern., IHMSC

Volume:2

Monograph title:Proceedings - 2013 5th International Conference on Intelligent Human-Machine Systems and Cybernetics, IHMSC 2013

Issue date:2013

Publication year:2013

Pages:453-456

Article number:6642783

Language:English

ISBN-13:9780769550114

Document type:Conference article (CA)

Conference name:2013 5th International Conference on Intelligent Human-Machine Systems and Cybernetics, IHMSC 2013

Conference date:August 26, 2013 - August 27, 2013

Conference location:Hangzhou, Zhejiang, China

Conference code:101433

Publisher:IEEE Computer Society, 2001 L Street N.W., Suite 700, Washington, DC 20036-4928, United States

Abstract:In some researches of infrared(IR) and visible image fusion, the IR images often contribute more useful information. However, the IR sensor is sensitive to the temperature of a scene. Therefore, the IR images have low definition and contain much noise which affects the quality of the fused image. In a decomposed image Based on wavelet transform, the contrast of an image is proportional to the relative variation of the gray scale. And with the scale increasing, at least the mean and variance of impulse noise and Gaussian noise linearly decrease. Thus, a novel image fusion method Based on the wavelet transform is proposed in this paper. Firstly, both the IR image and visible image are decomposed by wavelet transform and their multi-scale sub images are achieved. Then, the contrast of IR image is improved by modifying the modulus of the sub images in scale space and stretching the dynamic scope of smooth sub image at coarser resolution level. Finally, the improved IR images and visible images are fused at different scales and reconstructed to the fused image. Experiments are carried out Based on discrete wavelet transform (DWT) and dual tree complex wavelet transform (DTCWT). The results turn out that the enhanced method is effective compared with the original methods. &copy; 2013 IEEE.

Number of references:7

Main heading:Infrared imaging

Controlled terms:Cybernetics - Discrete wavelet transforms - Gaussian noise (electronic) - Image fusion - Image segmentation - Wavelet transforms

Uncontrolled terms:Coarser resolution - Contrast enhance - Dual tree complex wavelet transform (DT-CWT) - Image fusion methods - Infrared and visible image - Scale increasing - Subimages - Visible image

Classification code:713 Electronic Circuits - 716 Telecommunication; Radar, Radio and Television - 723.2 Data Processing and Image Processing - 723.4 Artificial Intelligence - 746 Imaging Techniques - 921.3 Mathematical Transformations

DOI:10.1109/IHMSC.2013.255

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 73>

 

Accession number:20141717632973

Title:An adaptive and effective single image dehazing algorithm based on dark channel prior

Authors:Zhu, Qingsong (1); Yang, Shuai (3); Heng, Pheng Ann (4); Li, Xuelong (5)

Author affiliation:(1) Shenzhen Institutes of Advanced Technology, Chinese Advanced of Sciences, Shenzhen, China; (2) Chinese University of Hong Kong, Hong Kong; (3) School of Electronic Engineering, Tsinghua University, Beijing, 100084, China; (4) Department of Computer Science and Engineering, Chinese University of Hong Kong, Ho Sin-Hang Engineering Building, Shatin, N.T., Hong Kong; (5) Centre for OPTical IMagery Analysis and Learning (OPTIMAL), Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, Shanxi, China

Corresponding author:Zhu, Q.(qs.zhu@siat.ac.cn)

Source title:2013 IEEE International Conference on Robotics and Biomimetics, ROBIO 2013

Abbreviated source title:IEEE Int. Conf. Rob. Biomimetics, ROBIO

Monograph title:2013 IEEE International Conference on Robotics and Biomimetics, ROBIO 2013

Issue date:2013

Publication year:2013

Pages:1796-1800

Article number:6739728

Language:English

Document type:Conference article (CA)

Conference name:2013 IEEE International Conference on Robotics and Biomimetics, ROBIO 2013

Conference date:December 12, 2013  -  December 14, 2013

Conference location:Shenzhen, China

Conference code:104586

Publisher:IEEE Computer Society

Abstract:In this paper, we describe a novel and effective single image enhancement algorithm for haze image. As we observe that, the contrast and intensity of haze image after using dark channel prior approach will unavoidably tend to be lower than those of the real scene, we proposed a method using histogram specification to make an improvement on image after dark channel prior approach. We make a large number of experiment and find that, if dealing with a haze image with large background area and low contrast, dark channel prior result will become dark, also a general haze image after dark channel occurs different degree of anamorphose. We introduce an adaptive algorithm to repair the different kinds of anamorphose on the hazy image after dark channel prior. The experimental results shows that our method make the dehazing result more close to real scene. &copy; 2013 IEEE.

Number of references:11

Main heading:Demulsification

Controlled terms:Adaptive algorithms - Biomimetics - Image enhancement - Repair - Robotics

Uncontrolled terms:Dark channel priors - Dehazing - Histogram specifications - Low contrast - Single image dehazing - Single images

Classification code:461.9 Biology - 513.1 Petroleum Refining, General - 723 Computer Software, Data Handling and Applications - 731.5 Robotics - 741 Light, Optics and Optical Devices - 913.5 Maintenance - 921 Mathematics

DOI:10.1109/ROBIO.2013.6739728

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 74>

 

Accession number:20132916505304

Title:A research on navigation star catalog selection algorithm based on SVM

Authors:Liu, Fu Cheng (1); Liu, Zhao Hui (1); Liu, Wen (1); Liang, Dong Sheng (1); Cui, Kai (1); Yuan, Hui (1)

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

Source title:Advanced Materials Research

Abbreviated source title:Adv. Mater. Res.

Volume:706-708

Monograph title:Mechatronics and Intelligent Materials III

Issue date:2013

Publication year:2013

Pages:613-617

Language:English

ISSN:10226680

ISBN-13:9783037857106

Document type:Conference article (CA)

Conference name:2013 3rd International Conference on Mechatronics and Intelligent Materials, MIM 2013

Conference date:May 18, 2013 - May 19, 2013

Conference location:XiShuangBanNa, China

Conference code:97695

Sponsor:Hong Kong Control Engin. and Inform.; Science Research Assoc. (CEIS); Internat. Frontiers of science and; technol. Research Assoc. (IFST); Integrated Research Center for Green Living Techniques; National Chin-Yi University of Technology

Publisher:Trans Tech Publications Ltd, Kreuzstrasse 10, Zurich-Durnten, CH-8635, Switzerland

Abstract:A navigation star catalog (NSC) selection algorithm via support vector machine (SVM) is proposed in this paper. The sphere spiral method is utilized to generate the sampling boresight directions by virtue of obtaining the uniform sampling data. Then the theory of regression analysis methods is adopted to extract the NSC, and an evenly distributed and small capacity NSC is obtained. Two criterions, namely a global criterion and a local criterion, are defined as the uniformity criteria to test the performance of the NSC generated. Simulations show that, compared with MFM, magnitude weighted method (MWM) and self-organizing algorithm(S-OA), the Boltzmann entropy (B.e) of SVM selection algorithm (SVM-SA) is the minimum, to 0.00207. Simultaneously, under the conditions such as the same field of view (FOV) and elimination of the hole, both the number of guide stars (NGS) and standard deviation (std) of SVM-SA is the least, respectively 7668 and 2.17. Consequently, the SVM-SA is optimal in terms of the NGS and the uniform distribution, and has also a strong adaptability. &copy; (2013) Trans Tech Publications, Switzerland.

Number of references:7

Main heading:Support vector machines

Controlled terms:Algorithms - Entropy - Intelligent materials - Pattern recognition - Regression analysis - Stars

Uncontrolled terms:Boltzmann entropy - Guide star - Regression analysis methods - Selection algorithm - Self organizing algorithm - Standard deviation - Star pattern recognition - Uniform distribution

Classification code:415 Metals, Plastics, Wood and Other Structural Materials - 641.1 Thermodynamics - 657.2 Extraterrestrial Physics and Stellar Phenomena - 716 Telecommunication; Radar, Radio and Television - 723 Computer Software, Data Handling and Applications - 922.2 Mathematical Statistics

DOI:10.4028/www.scientific.net/AMR.706-708.613

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 75>

 

Accession number:20132616449039

Title:Experimental study on high eff iciency of Ti: sapphire laser to single-mode fiber coupling

Authors:Liu, Jia (1); Fan, Wenhui (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) University of Chinese Academy of Sciences, Beijing 100049, China

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

Source title:Chinese Optics Letters

Abbreviated source title:Chin. Opt. Lett.

Volume:11

Issue:5

Issue date:May 2013

Publication year:2013

Article number:050605

Language:English

ISSN:16717694

Document type:Journal article (JA)

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

Abstract:We experimentally investigate an optimum scheme of coupling a collimated light from a Ti: sapphire laser source into a standard single-mode fiber (SMF). By adjusting the effective numerical aperture (NA) of coupling lens and eliminating the chromatic aberration, a coupling efficiency of around 70% is finally obtained. This result is close to the maximum value predicted by theoretical simulation. It is well demonstrated that high coupling efficiency between Ti:sapphire laser and SMF can also be obtained by optimizing certain parameters of a coupling lens, without employing any special optical components, or the specific fiber with complex structure. &copy; 2013 Chinese Optics Letters.

Number of references:23

Main heading:Aberrations

Controlled terms:Single mode fibers

Uncontrolled terms:Chromatic aberration - Coupling efficiency - Effective numerical aperture - Experimental studies - Optical components - Single-mode-fiber coupling - Standard single mode fibers - Theoretical simulation

Classification code:741 Light, Optics and Optical Devices - 741.1.2 Fiber Optics

DOI:10.3788/COL201311.050605

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 76>

 

Accession number:20131916321286

Title:Femtosecond multi-beam interference lithography based on dynamic wavefront engineering

Authors:Zhou, Qiang (1); Yang, Wenzheng (1); He, Fengtao (2); Stoian, Razvan (3); Hui, Rongqing (4); Cheng, Guanghua (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, CAS, Xi'an 710119, Shaanxi, China; (2) School of Electron and Engineering, Xi'An University of Post and Telecommunications, Xi'an 710121, Shaanxi, China; (3) Laboratoire Hubert Curien, UMR 5516 CNRS, Universit&#233; de Lyon, 42000 Saint Etienne, France; (4) Department of Electrical Engineering and Computer Science, University of Kansas, Lawrence, Kansas 66044, United States

Source title:Optics Express

Abbreviated source title:Opt. Express

Volume:21

Issue:8

Issue date:April 22, 2013

Publication year:2013

Pages:9851-9861

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:A method for precise multi-spot parallel ultrafast laser material structuring is presented based on multi-beam interference generated by dynamic spatial phase engineering. A Spatial Light Modulator (SLM) and digitally programming of phase masks are used to accomplish the function of a multi-facet pyramid lens, so that the laser beam can be spatially modulated to create beam multiplexing and desired two-dimensional (2D) multi-beam interference patterns. Various periodic microstructures on metallic alloy surfaces are fabricated with this technique. A method of preparing extended scale periodic microstructures by loading dynamic time-varying phases is also demonstrated. Scanning electron microscopy (SEM) reveals the period and morphology of the microstructures created using this technique. The asymmetry of interference modes generated from the beams with asymmetric wave vector distributions is equally explored. The flexibility of programming the period of the microstructures is demonstrated. &copy; 2013 Optical Society of America.

Number of references:25

Main heading:Loading

Controlled terms:Light modulators - Microstructure - Scanning electron microscopy - Ultrafast lasers

Uncontrolled terms:Asymmetric waves - Beam multiplexing - Dynamic spatial - Multi-beam interference pattern - Multibeam interferences - Periodic microstructure - Spatial light modulators - Spatially modulated

Classification code:672 Naval Vessels - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 744.1 Lasers, General - 933 Solid State Physics - 951 Materials Science

DOI:10.1364/OE.21.009851

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 77>

 

Accession number:20132016333246

Title:SIFT on manifold: An intrinsic description

Authors:Zhu, Guokang (1); Wang, Qi (1); Yuan, Yuan (1); Yan, Pingkun (1)

Author affiliation:(1) Center for OPTical IMagery Analysis and Learning (OPTIMAL), State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, Shaanxi, China; (2) School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, China

Corresponding author:Yuan, Y.(yuany@opt.ac.cn)

Source title:Neurocomputing

Abbreviated source title:Neurocomputing

Volume:113

Issue date:August 3, 2013

Publication year:2013

Pages:227-233

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:Scale Invariant Feature Transform is a widely used image descriptor, which is distinctive and robust in real-world applications. However, the high dimensionality of this descriptor causes computational inefficiency when there are a large number of points to be processed. This problem has led to several attempts at developing more compact SIFT-like descriptors, which are suitable for faster matching while still retaining their outstanding performance. This paper focuses on the SIFT descriptor and explore a dimensionality reduction for its local representation. By using the manifold learning algorithm of Locality Preserving Projections, a more effective and efficient descriptor LPP-SIFT can be obtained. A large number of experiments have been carried out to demonstrate the effectiveness of LPP-SIFT. Besides, the practicability of LPP-SIFT is also shown in another set of experiments for image similarity measurement. &copy; 2013 Elsevier B.V.

Number of references:29

Main heading:Experiments

Controlled terms:Computer vision - Learning algorithms

Uncontrolled terms:Descriptors - Dimensionality reduction - High dimensionality - Image Descriptor - Locality preserving projections - Manifold learning - Manifold learning algorithm - Scale invariant feature transforms

Classification code:723 Computer Software, Data Handling and Applications - 723.5 Computer Applications - 901.3 Engineering Research

DOI:10.1016/j.neucom.2013.01.020

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 78>

 

Accession number:20134817038435

Title:A synthetic aperture telescope based on a pair of gratings

Authors:Ji, Ke (1); Gao, Peng (2); Min, Junwei (2); Guo, Rongli (2); Menke, Neimule (1)

Author affiliation:(1) School of Physical Science and Technology, Inner Mongolia University, Hohhot 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 710119, China; (3) Ordos College, Inner Mongolia University, Ordos 017000, China

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

Source title:Journal of Modern Optics

Abbreviated source title:J. Mod. Opt.

Volume:60

Issue:15

Issue date:2013

Publication year:2013

Pages:1229-1233

Language:English

ISSN:09500340

E-ISSN:13623044

CODEN:JMOPEW

Document type:Journal article (JA)

Publisher:Taylor and Francis Ltd., 4 Park Square, Milton Park, Abingdon, Oxfordshire, OX14 4RN, United Kingdom

Abstract:A synthetic aperture is an effective approach to enhancement of the resolution of telescopes. In this paper, a new method to improve the resolution by using a pair of gratings is proposed. It allows collection of parts of the light diffracted from the object which could not previously reach the imaging device. This method improves the resolution and light energy utilization ratio of telescopes without introducing new chromatic aberration. An experiment for resolution testing was carried out and the feasibility and availability of the method were verified. &copy; 2013 Taylor &amp; Francis.

Number of references:16

Main heading:Telescopes

Controlled terms:Aberrations - Energy utilization - Optical resolving power - Synthetic apertures

Uncontrolled terms:Chromatic aberration - Effective approaches - Grating - Imaging device - Light energy

Classification code:525.3 Energy Utilization - 657 Space Physics - 716.2 Radar Systems and Equipment - 741 Light, Optics and Optical Devices - 741.1 Light/Optics

DOI:10.1080/09500340.2013.832428

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 79>

 

Accession number:20130315915562

Title:Design of a novel LED collimating element based on freeform surface

Authors:Yan, Xing-tao (1); Yang, Jian-feng (1); Xue, Bin (1); Zhang, Guo-qi (3); Bu, Fan (1)

Author affiliation:(1) Key Laboratory of Spectral Imaging Technology, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, 710119, China; (2) Graduate School of Chinese Academy of Sciences, Beijing, 100049, China; (3) Xi'an ZKMT Electronic Technology Equipment Co., Ltd, Xi'an, 710119, China

Corresponding author:Yan, X.-T.(xingtao.yan@163.com)

Source title:Optoelectronics Letters

Abbreviated source title:Optoelectron. Lett.

Volume:9

Issue:1

Issue date:2013

Publication year:2013

Pages:9-12

Language:English

ISSN:16731905

Document type:Journal article (JA)

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

Abstract:A novel element for collimating LED light is designed based on non-imaging optics. It is composed of a refraction lens and a reflector. The upper surface of the lens is freeform and calculated by geometrical optics and iterative process. The lens makes the rays in the range of 0&deg;-45&deg; from the optical axis collimated. The rays in the range of 45&deg;-90&deg; from the optical axis are collimated by the reflector. The inner surface of the reflector is parabolic with its focus located in the LED chip. The designed element is applicable to LED source of any emitting type. For a certain application, the simulation results of the designed element in Tracepro show that it has a very compact structure and good collimating performance. Just investigating the loss in the lens surfaces, this element has high light output efficiency of nearly 99%. Most lighting area radii are no more than 20 mm when the illuminated plane is 5 m away from the LED source. &copy; 2013 Tianjin University of Technology and Springer-Verlag Berlin Heidelberg.

Number of references:13

Main heading:Light emitting diodes

Controlled terms:Geometrical optics - Light - Reflection

Uncontrolled terms:Collimating element - Compact structures - Free-form surface - Freeforms - Inner surfaces - Iterative process - LED chips - LED lights - Lens surface - Light-output efficiency  - Non-imaging - Optical axis - TracePro - Upper surface

Classification code:741.1 Light/Optics

DOI:10.1007/s11801-013-2331-0

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 80>

 

Accession number:20132516432278

Title:A sub-nanosecond narrow-linewidth pulsed laser source with controllable repetition rate

Authors:Niu, L.Q. (1); Gao, C.X. (1); He, H.D. (1); Feng, L. (1); Cao, Z.Y. (1); Sun, C.D. (1); Zhu, S.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

Corresponding author:Zhu, S.L.(slzhu@opt.ac.cn)

Source title:Laser Physics

Abbreviated source title:Laser Phys.

Volume:23

Issue:7

Issue date:July 2013

Publication year:2013

Article number:075101

Language:English

ISSN:1054660X

E-ISSN:15556611

Document type:Journal article (JA)

Publisher:Institute of Physics Publishing, Temple Circus, Temple Way, Bristol, BS1 6BE, United Kingdom

Abstract:A compact all-fiber sub-nanosecond narrow-linewidth Yb-doped fiber amplifier with a controllable repetition rate has been investigated. Tunable temporal pulses ranging from sub-nanoseconds to 10 ns with repetition rates from 10 kHz to 1 MHz are obtained by controlling the waveform of the injected electrical-pulse signal. Due to the practical requirements of our intended applications, a distributed feedback semiconductor laser with a wavelength of 1064 nm, pulse duration of 802 ps, repetition rate of 500 kHz and average power of 20 &mu;W is used to seed a dual-stage single mode Yb-doped fiber amplifier. The characteristics of the amplified pulses are measured and exhibit a temporal duration of 810 ps with an average power of 31.2 mW. The gain of the amplified pulse is about 32 dB at the maximum output power. A notable feature of the amplifier pulses is that the spectral linewidth can be maintained to less than 0.1 nm during the dual-stage amplifier process. The noise level lies more than 22 dB below the peak value of the amplified spectrum, which represents an excellent signal-to-noise ratio. &copy; 2013 Astro Ltd.

Number of references:23

Main heading:Pulse repetition rate

Controlled terms:Fiber amplifiers - Linewidth - Semiconductor lasers - Ytterbium

Uncontrolled terms:Amplified pulse - Controllable repetition rate - Distributed feedback semiconductor laser - Maximum output power - Practical requirements - Pulsed laser sources - Spectral line width - Temporal durations

Classification code:547.2 Rare Earth Metals - 744 Lasers - 931.3 Atomic and Molecular Physics

DOI:10.1088/1054-660X/23/7/075101

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 81>

 

Accession number:20132616448420

Title:CFRC outer baffle structure &amp; modal analysis and test of space camera

Authors:Chu, Changbo (1); Chai, Wenyi (1); Zhang, Haosu (1); He, Tianbing (1); Wen, Desheng (1)

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

Corresponding author:Chu, C.(cbchu@opt.ac.cn)

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

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

Volume:42

Issue:4

Issue date:April 2013

Publication year:2013

Pages:1033-1037

Language:Chinese

ISSN:10072276

Document type:Journal article (JA)

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

Abstract:Outer baffle of space camera was designed and manufactured with more complicated shape and multilevel inclined vanes using high strengthened carbon fiber reinforced composite (CFRC) T300. Meanwhile the manufacturing process was introduced briefly. Modal analysis was finished with finite element method (FEM). Fixing the outer baffle on an existing fixture the modal test was finished and the radial modes and shapes were obtained, the test frequency response function map was also presented. Comparing the finite element analysis (FEA) and testing data it is indicated that the error of every mode is less than 2.3% between the FEA model &amp; the fact product. It can be seen that the structure of CFRC outer baffle is reasonable and the FEM is feasible. Used into the kinetic modeling process of the space camera, the FEM could have guidance significance to the design of the whole structure of camera.

Number of references:8

Main heading:Cameras

Controlled terms:Finite element method - Frequency response - Modal analysis

Uncontrolled terms:Carbon fiber reinforced composite - Complicated shape - Kinetic modeling - Manufacturing process - Modal test - Outer baffle - Space cameras - Test frequencies

Classification code:731.1 Control Systems - 742.2 Photographic Equipment - 921 Mathematics - 921.6 Numerical Methods

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 82>

 

Accession number:20134416937891

Title:Design and implementation of the computer monitoring and management system for the multi-mode combination timer device

Authors:Wu, Peng Fei (1); Li, Jian Xun (1); Wang, Yu Jian (1); Li, Jian Xun (2)

Author affiliation:(1) Xi'an University of Technology, Xi'an 710048, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an 710119, China

Source title:Advanced Materials Research

Abbreviated source title:Adv. Mater. Res.

Volume:760-762

Monograph title:Optoelectronics Engineering and Information Technologies in Industry

Issue date:2013

Publication year:2013

Pages:916-922

Language:English

ISSN:10226680

ISBN-13:9783037857731

Document type:Conference article (CA)

Conference name:2nd International Conference on Opto-Electronics Engineering and Materials Research, OEMR 2013

Conference date:October 19, 2013 - October 20, 2013

Conference location:Zhengzhou, Henan, China

Conference code:100390

Sponsor:Computer Science and Electronic Technology; Trans tech publications inc.; National Cheng Kung University

Publisher:Trans Tech Publications Ltd, Kreuzstrasse 10, Zurich-Durnten, CH-8635, Switzerland

Abstract:The multi-mode combination timer device can receive the GPS\GLONASS, No.1 BeiDou and loran-C at the same time. Since the multiple external frequency sources are introduced for the system, it is necessary to manage and monitor it. The wavelet decomposition atomic time algorithm is used to weight average the external reference signals in the wavelet domain, and the integrated time scales are obtained. The disciplined clock technology is employed to the time scale for calibrating the clock; the results indicate that the system can achieve fast timing and the complementary advantages of all kinds of resources. &copy; (2013) Trans Tech Publications, Switzerland.

Number of references:7

Main heading:Time measurement

Controlled terms:Clocks - Computer monitors - Electronics engineering - Information technology - Radio navigation - Wavelet decomposition

Uncontrolled terms:Design and implementations - Frequency source - Monitoring and management systems - Multimodes - Reference signals - Time algorithms - Time-scales - Wavelet domain

Classification code:943.3 Special Purpose Instruments - 921.3 Mathematical Transformations - 903 Information Science - 722.2 Computer Peripheral Equipment - 718 Telephone Systems and Related Technologies; Line Communications - 717 Optical Communication - 716.3 Radio Systems and Equipment - 716 Telecommunication; Radar, Radio and Television - 715 Electronic Equipment, General Purpose and Industrial - 714 Electronic Components and Tubes - 713 Electronic Circuits

DOI:10.4028/www.scientific.net/AMR.760-762.916

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 83>

 

Accession number:20132916506343

Title:Study of multiple quantum beats in atomic wavepackets

Authors:Zhu, Chang Jun (1); Xue, Bing (1); Zhai, Xue Jun (1); He, Jun Fang (2)

Author affiliation:(1) Department of Physics, School of Science, Xi'an Polytechnic University, Xi'an 710048, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Xi'an 710119, China

Source title:Applied Mechanics and Materials

Abbreviated source title:Appl. Mech. Mater.

Volume:325-326

Monograph title:Manufacturing Engineering and Process II

Issue date:2013

Publication year:2013

Pages:119-122

Language:English

ISSN:16609336

E-ISSN:16627482

ISBN-13:9783037857076

Document type:Conference article (CA)

Conference name:2013 2nd International Conference on Manufacturing Engineering and Process, ICMEP 2013

Conference date:April 13, 2013 - April 14, 2013

Conference location:Vancouver, BC, Canada

Conference code:97674

Sponsor:Science and Engineering Institute; University of Ontario Institute of Technology (UOIT), Canada

Publisher:Trans Tech Publications Ltd, Kreuzstrasse 10, Zurich-Durnten, CH-8635, Switzerland

Abstract:A theoretical model consisting of 5 energy levels in coupled four-wave mixing processes was proposed to analyze the coherent characteristics of atomic wavepackets using perturbative theory. The equations of motions of the density matrix were derived and the third-order density matrix elements were presented. Under the condition that the duration of laser pulses is sufficiently short, the system response was treated as impulse response. Moreover, in the lowest order perturbation theory, the third-order nonlinear polarization was obtained using rotating-wave approximation. The results show that multiple quantum beats are embedded in the coupled four-wave mixing signals, and coherent dynamics of wavepackets can be retrieved from the quantum beat dynamics. &copy; (2013) Trans Tech Publications, Switzerland.

Number of references:6

Main heading:Wave packets

Controlled terms:Equations of motion - Four wave mixing - Impulse response - Industrial engineering

Uncontrolled terms:Coherent dynamics - Density matrix elements - Lowest-order perturbation theories - Nonlinear polarizations - Quantum beat - Rotating wave approximations - System response - Theoretical models

Classification code:408.1 Structural Design, General - 711.1 Electromagnetic Waves in Different Media - 912.1 Industrial Engineering - 931.1 Mechanics - 931.4 Quantum Theory; Quantum Mechanics

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 84>

 

Accession number:20135017076778

Title:Object or background: Whose call is it in complicated scene classification?

Authors:Mou, Lichao (1); Lu, Xiaoqiang (1); Yuan, Yuan (1)

Author affiliation:(1) Center for OPTical IMagery Analysis and Learning (OPTIMAL), State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xi'an 710119, Shaanxi, China; (2) Graduate University, Chinese Academy of Science, 19A Yuquanlu, Beijing, 100049, China

Source title:2013 IEEE China Summit and International Conference on Signal and Information Processing, ChinaSIP 2013 - Proceedings

Abbreviated source title:IEEE China Summit Int. Conf. Signal Inf. Process., ChinaSIP - Proc.

Monograph title:2013 IEEE China Summit and International Conference on Signal and Information Processing, ChinaSIP 2013 - Proceedings

Issue date:2013

Publication year:2013

Pages:543-546

Article number:6625399

Language:English

ISBN-13:9781479910434

Document type:Conference article (CA)

Conference name:2013 IEEE China Summit and International Conference on Signal and Information Processing, ChinaSIP 2013

Conference date:July 6, 2013 - July 10, 2013

Conference location:Beijing, China

Conference code:101067

Sponsor:The Institute of Electrical and Electronics Engineers Signal Processing Society (IEEE SPS)

Abstract:Scene semantic parsing is a challenging problem in the field of computer vision. Most approaches exploit low-level features to describe the whole scene. However, there is a large semantic gap between low-level features and high-level scene semantic. In this paper, a scene classification approach is proposed by exploiting semantic objects/materials of the background to reduce the semantic gap. The proposed approach can be divided three steps: First we construct two high-level semantic features (BCFs and BSLFs). Second, we design an approach to learn the prior probability of the Bayesian Networks from these two semantic features of training images. Finally, Bayesian Networks is used to achieve the goal of scene classification. Experimental results show that our approach achieves state-of-the-art performance on the task of scene classification compare with other approaches. &copy; 2013 IEEE.

Number of references:10

Main heading:Image classification

Controlled terms:Bayesian networks - Data processing - Semantics

Uncontrolled terms:Background analysis - High-level semantic features - Low-level features - Scene categorization - Scene classification - scene parsing - Semantic features - State-of-the-art performance

Classification code:716 Telecommunication; Radar, Radio and Television - 723.2 Data Processing and Image Processing - 903.2 Information Dissemination - 921.4 Combinatorial Mathematics, Includes Graph Theory, Set Theory

DOI:10.1109/ChinaSIP.2013.6625399

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 85>

 

Accession number:20133016530636

Title:Underwater optical imaging technology and its applications

Authors:Zeng, Rong (1); He, Jun Hua (2); Lv, Pei (2)

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

Source title:Advanced Materials Research

Abbreviated source title:Adv. Mater. Res.

Volume:710

Monograph title:Advanced Technologies and Solutions in Industry

Issue date:2013

Publication year:2013

Pages:408-412

Language:English

ISSN:10226680

ISBN-13:9783037857205

Document type:Conference article (CA)

Conference name:2013 International Conference on Advanced Technologies and Solutions in Industry, ICATSI 2013

Conference date:March 22, 2013 - March 23, 2013

Conference location:Taiyuan, Shanxi, China

Conference code:97849

Publisher:Trans Tech Publications Ltd, Kreuzstrasse 10, Zurich-Durnten, CH-8635, Switzerland

Abstract:The applications of underwater optical imaging technology are reviewed. The main types of underwater laser imaging technology are introduced, such as underwater laser scanning imaging and underwater distance selected imaging. The respective imaging principle and characteristics are presented. Furthermore, the newest imaging technology, such as underwater compressive sensing imaging technology is described in detail. The recent researching status is included. &copy; (2013) Trans Tech Publications, Switzerland.

Number of references:11

Main heading:Underwater imaging

Controlled terms:Laser applications - Optical image storage - Signal reconstruction

Uncontrolled terms:Compressive sensing - Imaging principle - Imaging technology - ITS applications - Laser scanning - Optical imaging technology - Range-gated - Underwater laser imaging

Classification code:472 Ocean Engineering - 716.1 Information Theory and Signal Processing - 741 Light, Optics and Optical Devices - 741.3 Optical Devices and Systems - 744.9 Laser Applications - 746 Imaging Techniques

DOI:10.4028/www.scientific.net/AMR.710.408

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 86>

 

Accession number:20134216860599

Title:Graphene-based 2 &mu;m Tm<sup>3+</sup>-doped fiber passively Q-switched laser

Authors:Li, Diao (1); Jiang, Man (1); Qi, Mei (1); Zheng, Xin-Liang (1); Ren, Zhao-Yu (1); Sun, Zhi-Pei (2); Wang, Yi-Shan (3); Bai, Jin-Tao (1)

Author affiliation:(1) Department of Physics, Institute of Photonics and Photon-Technology, Northwest University, Xi'an 710069, China; (2) Department of Engineering, University of Cambridge, Cambridge CB30FA, United Kingdom; (3) State Key Laboratory of Transient Optics and Technology, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Bai, J.-T.(baijt@nwu.edu.cn)

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:42

Issue:8

Issue date:August 2013

Publication year:2013

Pages:978-982

Language:Chinese

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

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

Abstract:The output characteristics of graphene-based passively Q-switched pulses at 2 &mu;m wavelengths were reported. On the basis of linear resonant cavity, Tm<sup>3+</sup>-doped fiber and graphene saturable absorber mirror served as gain medium and passively Q-switched device respectively. Tm<sup>3+</sup>-doped fiber was end pumped by 792 nm semiconductor laser. Light in the cavity was focused onto graphene membrane through a set of collimation and focusing lens. Passively Q-switched pulses centered at 1 958 nm wavelength were acquired successfully. The minimum pulse width of 1.02 &mu;s was obtained when pump power rise to 3.0 W, and corresponding average output power of 26 mW, repetition rate of 116 kHz, single pulse energy of 224 nJ were obtained respectively. Furthermore, average output power and pulse width presented approximate linear relationship with incident pump power. The experimental results indicate that excellent saturated absorption characteristic of graphene is effective for passively Q-switched pulse operation at 2 &mu;m wavelengths.

Number of references:18

Main heading:Optical pumping

Controlled terms:Fibers - Graphene - Q switched lasers - Q switching - Saturable absorbers

Uncontrolled terms:Graphene saturable absorbers - Linear resonant cavity - Output characteristics - Passively Q-switched - Passively Q-switched lasers - Saturated absorptions - Short pulse - Tm-doped

Classification code:817 Plastics and Other Polymers: Products and Applications - 812 Ceramics, Refractories and Glass - 804 Chemical Products Generally - 761 Nanotechnology - 744.8 Laser Beam Interactions - 744.1 Lasers, General - 741.1 Light/Optics

DOI:10.3788/gzxb20134208.0978

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 87>

 

Accession number:20140817350390

Title:Research progress of microstructured polymer optical fiber preparation method

Authors:Wang, Jian (1); Wei, Jian-Ping (1); Yang, Bo (4); Zhang, Li-Wei (3); Yang, Xue-Feng (3); Yuan, Xiao-Li (3)

Author affiliation:(1) Key Laboratory of Gas Geology and Gas Control, Henan Polytechnic University, Jiaozuo 454000, 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) Department of Physics and Chemistry, Henan Polytechnic University, Jiaozuo 454000, China; (4) School of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China

Corresponding author:Wang, J.

Source title:Gongneng Cailiao/Journal of Functional Materials

Abbreviated source title:Gongneng Cailiao

Volume:44

Issue:SUPPL.2

Issue date:December 30, 2013

Publication year:2013

Pages:171-175

Language:Chinese

ISSN:10019731

CODEN:GOCAEA

Document type:Journal article (JA)

Publisher:Journal of Functional Materials, P.O. Box 1512, Chongqing, 630700, China

Abstract:Microstructured optical fibers attract extensive attention for their excellent optical properties. As an important part of the microstructure fiber, microstructured polymer optical fibers have been studied in depth by researchers. In this paper, the preparation methods of microstructured polymer fiber preform are reviewed. It mainly introduces the methods such as packing method, drilling holes method, casting method, extrusion method and extrusion-molding method. The advantages and disadvantages of these methods are analyzed and prospected.

Number of references:32

Main heading:Optical fibers

Controlled terms:Antibodies - Extrusion molding - Polymers

Uncontrolled terms:Casting method - Drilling holes - Extrusion method - Micro-structured optical fibers - Microstructure fibers - Microstructured polymer optical fibers - Packing method - Preparation method

Classification code:461.9.1 Immunology - 741.1.2 Fiber Optics - 815.1 Polymeric Materials - 816 Plastics and Other Polymers: Processing and Machinery

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 88>

 

Accession number:20131516204736

Title:Long-term stable bright amplitude-squeezed state of light at 1064 nm for quantum imaging

Authors:Feng, Fei (1); Bi, Si Wen (1); Lu, Bao Zhu (1); Kang, Meng Hua (1)

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

Corresponding author:Feng, F.(fengfei@opt.cn)

Source title:Optik

Abbreviated source title:Optik

Volume:124

Issue:11

Issue date:June 2013

Publication year:2013

Pages:1070-1073

Language:English

ISSN:00304026

Document type:Journal article (JA)

Publisher:Urban und Fischer Verlag Jena, P.O. Box 100537, Jena, 07705, Germany

Abstract:Bright amplitude-squeezed light at 1064 nm is generated with excellent long-term stability by utilizing the degenerate optical parametric amplifier (OPA) based on periodically poled KTiOPO<inf>4</inf> (PPKTP) crystal. Amplitude noise reduction of as much as -5.5 dB is observed directly at an output power of 0.3 mW. This corresponds to a squeezing of -6.22 dB in the beam, the detection efficiency and the propagation efficiency are taken into account. The average value of the detected noise reduction in continuous operation over 5 h is -3.8 dB by locking the cavity length of the OPA. The squeezed state light is applied for imaging of virtual object. The experimental results indicate that the obtained image is more distinct and has less distortion compared to that obtained by infrared coherent light. &copy; 2013 Elsevier GmbH. All rights reserved.

Number of references:21

Main heading:Noise abatement

Controlled terms:Homodyne detection - Light amplifiers - Optical parametric amplifiers - Quantum optics - Squeezed light

Uncontrolled terms:Continuous operation - Detection efficiency - Long term stability - Optical parametric amplifiers (OPA) - Periodically poled - Quantum imaging - Self-balanced - Virtual objects

Classification code:714 Electronic Components and Tubes - 714.2 Semiconductor Devices and Integrated Circuits - 716.1 Information Theory and Signal Processing - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 751.4 Acoustic Noise

DOI:10.1016/j.ijleo.2013.01.005

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 89>

 

Accession number:20131916321362

Title:Erratum: Empirical mode decomposition based background removal and de-noising in polarization interference imaging spectrometer (Optics Express (2013) 21:3 (2592-2605))

Authors:Ren, Wenyi (1); Zhang, Chunmin (1); Mu, Tingkui (1); Fu, Lili (1); Jia, Chenling (1)

Author affiliation:(1) School of Science, Xi'An Jiaotong University, Xi'an 710049, China; (2) Non-equilibrium Condensed Matter and Quantum Engineering Laboratory, Key Laboratory, Ministry of Education, Xi'an 710049, China; (3) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Science (CAS), Xi'an 710119, China

Source title:Optics Express

Abbreviated source title:Opt. Express

Volume:21

Issue:8

Issue date:April 22, 2013

Publication year:2013

Pages:10207

Language:English

E-ISSN:10944087

Document type:Journal article (JA)

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

Number of references:1

DOI:10.1364/OE.21.010207

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 90>

 

Accession number:20133516678921

Title:Dispersion imaging spectrometer for detecting and locating energetic targets in real time

Authors:Yang, Qinghua (1); Zeng, Xiaodong (1); Zhao, Baochang (2)

Author affiliation:(1) School of Technical Physics, Xidian University, Xi'an 710071, China; (2) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Yang, Q.(yangqh666@163.com)

Source title:Chinese Optics Letters

Abbreviated source title:Chin. Opt. Lett.

Volume:11

Issue:6

Issue date:June 2013

Publication year:2013

Article number:061202

Language:English

ISSN:16717694

Document type:Journal article (JA)

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

Abstract:A conceptual dispersion imaging spectrometer (DIS) is proposed. It consists of a telescope, four prisms, an imaging lens, and a detector. The first prism allows only the first set of wavelengths along the first direction to pass and disperse. The second prism allows only the second set of wavelengths along the second direction, which is perpendicular to the first. The third and fourth prisms are used to compensate for the angular deviations from the optical axes of the first and second prisms, respectively. The proposed DIS disperses the spectra of a target to form an L-shaped dispersion pattern (LDP). The theoretical calculation and numerical simulation of the LDP are presented. The DIS can locate multiple targets based only on data obtained from a single frame. It is suitable for detecting and locating energetic targets in real time. &copy; 2013 Chinese Optics Letters.

Number of references:25

Main heading:Dispersion (waves)

Controlled terms:Dispersions - Prisms - Spectrometers

Uncontrolled terms:Angular deviations - Dispersion imaging - Dispersion patterns - Imaging lens - Multiple targets - Optical axes - Single frames - Theoretical calculations

Classification code:711.1 Electromagnetic Waves in Different Media - 741.3 Optical Devices and Systems - 951 Materials Science

DOI:10.3788/COL201311.061202

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 91>

 

Accession number:20130415939973

Title:Prostate segmentation in MR images using discriminant boundary features

Authors:Yang, Meijuan (1); Li, Xuelong (1); Turkbey, Baris (2); Choyke, Peter L. (2); Yan, Pingkun (1)

Author affiliation:(1) Center for OPTical IMagery Analysis and Learning, State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xi'an 710119, Shaanxi, China; (2) National Institutes of Health, National Cancer Institute, Bethesda, MD 20892, United States

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

Source title:IEEE Transactions on Biomedical Engineering

Abbreviated source title:IEEE Trans. Biomed. Eng.

Volume:60

Issue:2

Issue date:2013

Publication year:2013

Pages:479-488

Article number:6359798

Language:English

ISSN:00189294

E-ISSN:15582531

CODEN:IEBEAX

Document type:Journal article (JA)

Publisher:IEEE Computer Society, 2001 L Street N.W., Suite 700, Washington, DC 20036-4928, United States

Abstract:Segmentation of the prostate in magnetic resonance image has become more in need for its assistance to diagnosis and surgical planning of prostate carcinoma. Due to the natural variability of anatomical structures, statistical shape model has been widely applied in medical image segmentation. Robust and distinctive local features are critical for statistical shape model to achieve accurate segmentation results. The scale invariant feature transformation (SIFT) has been employed to capture the information of the local patch surrounding the boundary. However, when SIFT feature being used for segmentation, the scale and variance are not specified with the location of the point of interest. To deal with it, the discriminant analysis in machine learning is introduced to measure the distinctiveness of the learned SIFT features for each landmark directly and to make the scale and variance adaptive to the locations. As the gray values and gradients vary significantly over the boundary of the prostate, separate appearance descriptors are built for each landmark and then optimized. After that, a two stage coarse-to-fine segmentation approach is carried out by incorporating the local shape variations. Finally, the experiments on prostate segmentation from MR image are conducted to verify the efficiency of the proposed algorithms. &copy; 1964-2012 IEEE.

Number of references:21

Main heading:Image segmentation

Controlled terms:Discriminant analysis - Magnetic resonance imaging - Medical image processing - Urology

Uncontrolled terms:Anatomical structures - Coarse-to-fine - Descriptors - Gray value - Image features - Local feature - Local shape - Magnetic resonance images - Medical image segmentation - MR images  - Natural variability - Point of interest - Prostate carcinoma - Prostate segmentation - Scale invariant - Segmentation results - SIFT Feature - Statistical shape model - Surgical planning

Classification code:461.6 Medicine and Pharmacology - 723.2 Data Processing and Image Processing - 746 Imaging Techniques - 922 Statistical Methods

DOI:10.1109/TBME.2012.2228644

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 92>

 

Accession number:20131616207206

Title:A stable polarization switching laser from a bidirectional passively mode-locked thuliumdoped fiber oscillator

Authors:Zhou, Wei (1); Shen, Deyuan (1); Wang, Yishan (1); Ma, Hefeng (1); Wang, Fei (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) School of Science, Xi'an Jiaotong University, Xi'an, 710049, China; (3) Graduate University of Chinese Academy of Sciences, Beijing 100049, China

Corresponding author:Zhou, W.(zhouwei@opt.cn)

Source title:Optics Express

Abbreviated source title:Opt. Express

Volume:21

Issue:7

Issue date:April 8, 2013

Publication year:2013

Pages:8945-8952

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:We report on a novel polarization switching laser from a bidirectional passively mode-locked thulium(Tm)-doped fiber oscillator, which was characterized by the periodical change of polarization state of every pulse. The switching laser was created by combing two orthogonally stable vector solitons, which were found to be wave-breaking-free pulses in the all-anomalous- dispersion regime. The measured repetition rates of switching laser and the corresponding vector solitons were 49.596 MHz, 24.798 MHz, and 24.798MHz. By controlling wave plates, either of the polarized pulse trains can be switched on or off. To our knowledge, this is the first report of polarization switching laser with vector solitons in Tm fiber oscillators. &copy; 2013 Optical Society of America.

Number of references:26

Main heading:Solitons

Controlled terms:Optical switches - Passive mode locking

Uncontrolled terms:Controlling waves - Doped fiber - Passively mode-locked - Polarization state - Polarization switching - Repetition rate - Thulium-doped fibers - Vector soliton

Classification code:741.3 Optical Devices and Systems - 744.1 Lasers, General - 931.3 Atomic and Molecular Physics

DOI:10.1364/OE.21.008945

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 93>

 

Accession number:IP52877255

Title:Dayside aurora classification via BIFs-based sparse representation using manifold learning

Authors:Han, Bing (1); Zhao, Xiaojing (1); Tao, Dacheng (3); Li, Xuelong (4); Hu, Zejun (5); Hu, Hongqiao (5)

Author affiliation:(1) VIPS Lab, School of Electronic Engineering, Xidian University, Xi'an 710071, China; (2) Key Laboratory of Intelligent Perception and Image Understanding of Ministry of Education of China, Xidian University, Xi'an 710071, China; (3) Engineering and Information Technology, University of Technology Sydney, Sydney, NSW y2007, Australia; (4) Center for Optical Imagery Analysis and Learning, Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an 710119, China; (5) SOA Key Laboratory for Polar Science, Polar Research Institute of China, Shanghai 200136, China

Corresponding author:Han, B.(bhan@xidian.edu.cn)

Source title:International Journal of Computer Mathematics

Abbreviated source title:Int J Comput Math

Issue date:2013

Publication year:2013

Language:English

ISSN:00207160

E-ISSN:10290265

CODEN:IJCMAT

Document type:Article in Press

Abstract:Aurora is the typical ionosphere track generated by the interaction of solar wind and magnetosphere, whose modality and variation are significant to the study of space weather activity. A new aurora classification algorithm based on biologically inspired features (BIFs) and discriminative locality alignment (DLA) is proposed in this paper. First, an aurora image is represented by the BIFs, which combines the C1 units from the hierarchical model of object recognition in cortex and the gist features from the saliency map; then, the manifold learning method called DLA is used to obtain the effective sparse representation for auroras based on BIFs; finally, classification results using support vector machine and nearest neighbour with three sets of features: the C1 unit features, the gist features and the BIFs illustrate the effectiveness and robustness of our method on the real aurora image database from Chinese Arctic Yellow River Station. &copy; 2013 &copy; 2013 Taylor &amp; Francis.

Number of references:31

Main heading:Image retrieval

Controlled terms:Hierarchical systems - Ionosphere - Magnetosphere - Object recognition

Uncontrolled terms:Biologically inspired - Classification algorithm - Classification results - Hierarchical model - Manifold learning - Nearest neighbour - Sets of features - Sparse representation

Classification code:443.1 Atmospheric Properties - 711.1 Electromagnetic Waves in Different Media - 716 Telecommunication; Radar, Radio and Television - 741 Light, Optics and Optical Devices - 961 Systems Science

DOI:10.1080/00207160.2013.831084

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 94>

 

Accession number:20132816483962

Title:Auto-exposure algorithm for scenes with high dynamic range based on image entropy

Authors:Yang, Zuo-Ting (1); Ruan, Ping (1); Zhai, Bo (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 100049, China

Corresponding author:Ruan, P.(ruanp@opt.ac.cn)

Source title:Guangzi Xuebao/Acta Photonica Sinica

Abbreviated source title:Guangzi Xuebao

Volume:42

Issue:6

Issue date:June 2013

Publication year:2013

Pages:742-746

Language:Chinese

ISSN:10044213

CODEN:GUXUED

Document type:Journal article (JA)

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

Abstract:Automatic exposure control is a process of optimizing image brightness by controlling the exposure. To achieve auto exposure in digital cameras, image brightness is widely used because of its direct relationship with exposure value. Although entropy has been used in various image processing applications, it has not been used for AE application. A new auto-exposure algorithm was proposed based on the image entropy. The proposed method calculated the entropy of captured images to estimate lighting conditions. By comparing the image entropy and entropy threshold, the images were divided into the regions of interest and regions of no interest. After that, assign different weights to the regions of interest and regions of no interest, so that the overall brightness level was made to carry more information of the regions of interest. At last, the image can get accurate automatic exposure. The algorithm is mainly based on the image entropy, so the exposures are not affected by the location of objects in the image. It can make the algorithm more flexible. The experiment results show that the algorithm can accurately detect high-contrast lighting conditions and improve the dynamic range of output images for a camera system, at the same time the algorithm can also increases the accuracy of auto exposure.

Number of references:13

Main heading:Luminance

Controlled terms:Algorithms - Exposure controls - Image processing - Lighting

Uncontrolled terms:Exposure value - High dynamic range - Image brightness - Image entropy - Image processing applications - Lighting conditions - Regions of interest - Weight

Classification code:707 Illuminating Engineering - 723 Computer Software, Data Handling and Applications - 741 Light, Optics and Optical Devices - 741.1 Light/Optics - 742.1 Photography - 921 Mathematics

DOI:10.3788/gzxb20134206.0742

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 95>

 

Accession number:20134316878004

Title:Effect of turbulence on visibility and signal-to-noise ratio of lensless ghost imaging with thermal light

Authors:Yao, Yin-Ping (1); Wan, Ren-Gang (1); Zhang, Shi-Wei (1); Zhang, Tong-Yi (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) Graduate School of Chinese Academy of Sciences, Beijing 100039, China

Corresponding author:Zhang, T.-Y.(tyzhang@opt.ac.cn)

Source title:Optik

Abbreviated source title:Optik

Volume:124

Issue:24

Issue date:December 2013

Publication year:2013

Pages:6973-6977

Language:English

ISSN:00304026

Document type:Journal article (JA)

Publisher:Urban und Fischer Verlag Jena, P.O. Box 100537, Jena, 07705, Germany

Abstract:Lensless ghost imaging with thermal light through turbulent atmosphere is investigated. Based on the extended Huygens-Fresnel integral and the classical optical coherence theory, we derive the expressions for the visibility and signal-to-noise ratio (SNR) of lensless ghost imaging through turbulence. To show the effect of turbulence on the quality of lensless ghost imaging, we numerically calculate the visibility and SNR for different propagation distances and various turbulence strengths. Though turbulence degrades the image quality, specific visibility and SNR can be obtained for ghost imaging in certain propagation distances. &copy; 2013 Elsevier GmbH. All rights reserved.

Number of references:28

Main heading:Signal to noise ratio

Controlled terms:Imaging techniques - Turbulence - Visibility

Uncontrolled terms:Extended Huygens-Fresnel integrals - Ghost imaging - Propagation distances - Signal-noise-rote ratio (SNR) - Signaltonoise ratio (SNR) - Thermal light - Turbulence strength - Turbulent atmosphere

Classification code:443.1 Atmospheric Properties - 716.1 Information Theory and Signal Processing - 741 Light, Optics and Optical Devices - 741.2 Vision - 746 Imaging Techniques

DOI:10.1016/j.ijleo.2013.05.184

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 96>

 

Accession number:20134316893779

Title:Terahertz spectroscopy of DNA nucleobases: Cytosine and thymine

Authors:Yan, Hui (1); Fan, Wen-Hui (1); Zheng, Zhuan-Ping (1); Liu, Jia (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China; (2) Zhongyuan University of Technology, Zhengzhou 450007, China

Corresponding author:Fan, W.-H.(fanwh@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:33

Issue:10

Issue date:October 2013

Publication year:2013

Pages:2612-2616

Language:Chinese

ISSN:10000593

CODEN:GYGFED

Document type:Journal article (JA)

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

Abstract:The absorption features of DNA nucleobases cytosine and thymine were measured by terahertz time-domain spectroscopy (THz-TDS) from 0.1 to 3.5 THz. Our experimental results clearly show that these important biomolecules exhibit distinctive absorption features in THz region. To the best of our knowledge, the subtle absorption peak of cytosine at 2.53 THz is reported for the first time. Moreover, geometry optimizations and lattice dynamic calculations on cytosine crystal were also performed with the pseudo-potential plane wave method of density functional theory by taking periodic boundary conditions into account. All measured terahertz absorption features of cytosine were assigned successfully and its absorption spectrum was reproduced according to our calculations. Furthermore, our results show that absorption features of cytosine below 3.5 THz arise from external modes in translation and rotation motions, which are dominated by the intermolecular hydrogen bonds.

Number of references:14

Main heading:Biomolecules

Controlled terms:Absorption spectroscopy - Frequency bands - Hydrogen bonds - Laser pulses - Terahertz spectroscopy

Uncontrolled terms:Cytosine - Geometry optimization - Intermolecular hydrogen bonds - Periodic boundary conditions - Terahertz time domain spectroscopy - Theoretical calculations - Thymine - THz-TDS

Classification code:716.4 Television Systems and Equipment - 741 Light, Optics and Optical Devices - 744.1 Lasers, General - 801 Chemistry - 931.1 Mechanics

DOI:10.3964/j.issn.1000-0593(2013)10-2612-05

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 97>

 

Accession number:20134516950204

Title:Passive Q-switching in a diode-side-pumped Nd:YAG laser at 1.319 &mu; m

Authors:Yan, Shilian (1); Zhang, Ling (1); Yu, Haijuan (1); Li, Menglong (1); Sun, Wei (1); Hou, Wei (1); Lin, Xuechun (1); Wang, Yonggang (2); Wang, Yishan (2)

Author affiliation:(1) Chinese Academy of Sciences, Institute of Semiconductors, Laboratory of All-Solid-State Light Sources, Beijing 100083, China; (2) Chinese Academy of Sciences, Xi'An Institute of Optics and Precision Mechanics, State Key Laboratory of Transient Optics and Photonics, Xi'an 710119, China

Source title:Optical Engineering

Abbreviated source title:Opt Eng

Volume:52

Issue:10

Issue date:2013

Publication year:2013

Article number:106107

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:We demonstrated a passively Q-switched Nd:YAG laser operating at 1.319 &mu;m using a transmission-type single-wall carbon nanotube (SWCNT) as the saturable absorber. This is the first report on using SWCNT as a Q-switcher for 1.319 &mu;m Nd:YAG laser in a side-pumped configuration. A maximum output power of 780 mW was obtained with 1.15-&mu;s pulse duration and 42.7-kHz repetition rate. &copy; 2013 Society of Photo-Optical Instrumentation Engineers.

Number of references:35

Main heading:Neodymium lasers

Controlled terms:Carbon nanotubes - Q switching - Saturable absorbers

Uncontrolled terms:Diode-side-pumped - Maximum output power - Passive Q-switching - Passively Q-switched - Pulse durations - Q-switched - Repetition rate - Side-pumped

Classification code:744 Lasers - 761 Nanotechnology

DOI:10.1117/1.OE.52.10.106107

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 98>

 

Accession number:20140317203849

Title:A new reduction technique for thermospheric wind and temperature measurement with Fabry-Perot interferometer

Authors:Wang, Hong (1); Liu, Xuebin (1); Feng, Yutao (1); Bai, Qinglan (1)

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

Corresponding author:Wang, H.(wosky619@sina.com)

Source title:Guangxue Xuebao/Acta Optica Sinica

Abbreviated source title:Guangxue Xuebao

Volume:33

Issue:11

Issue date:November 2013

Publication year:2013

Article number:1130003

Language:Chinese

ISSN:02532239

CODEN:GUXUDC

Document type:Journal article (JA)

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

Abstract:The principle of measuring thermospheric wind and temperature by Fabry-Perot interferometer (FPI) is elaborated, the transfer function of FPI and the analytical response expression to the incident line is studied. Referring to the basic principle of traditional wind and temperature retrieval method with FPI, a new matrix reduction technique is proposed. This technique is based on the decompose and approximate mathematics to obtain the matrix form of analytical response expression, then a least-squares technique is employed to get the thermospheric wind and temperature. Simulation results show that when the guessed wind is less than 150 m/s and the guessed temperature is less than 80 K, the error range is &plusmn;3 m/s for wind and &plusmn;10 K for temperature. The matrix technique not only retains the accuracy of a full Fourier Series Representation method, but also avoids instrument calibration and wavelength translation, which makes it simple and fast.

Number of references:16

Main heading:Temperature measurement

Controlled terms:Atmospheric optics - Calibration - Fabry-Perot interferometers - Fourier series

Uncontrolled terms:Instrument calibrations - Least-squares techniques - Matrix reduction - Reduction techniques - Series representations - Systematic response expression - Temperature retrieval - Thermospheric winds

Classification code:944 Moisture, Pressure and Temperature, and Radiation Measuring Instruments - 943 Mechanical and Miscellaneous Measuring Instruments - 942 Electric and Electronic Measuring Instruments - 944.6 Temperature Measurements - 941.3 Optical Instruments - 921.3 Mathematical Transformations - 741.1 Light/Optics - 941 Acoustical and Optical Measuring Instruments

DOI:10.3788/AOS201333.1130003

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 99>

 

Accession number:20132516429446

Title:Intersubband optical absorption of semiconductor quantum wells driven by in-plane terahertz field

Authors:Zhu, Haiyan (1); Luo, Wenfeng (1); Li, Xiaoli (1); Zhang, Tongyi (2)

Author affiliation:(1) School of Electronic Engineering, Xi'an University of Posts and Telecommunications, Xi'an 710121, 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

Corresponding author:Zhu, H.(haiyanvvv@xupt.edu.cn)

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

Abbreviated source title:Qiangjiguang Yu Lizishu

Volume:25

Issue:6

Issue date:June 2013

Publication year:2013

Pages:1460-1464

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:The intersubband optical absorption of a semiconductor quantum well driven by an in-plane terahertz electric field is investigated theoretically by employing the extended semiconductor Bloch equations. Our results show that in-plane polarized terahertz fields induce a variety of behavior in the absorption spectra, including terahertz replicas of the main absorption peak and the dynamical Franz-Keldysh effect. The dependence of the absorption of the probe field on frequency and phase of the terahertz field is also very remarkable.

Number of references:16

Main heading:Semiconductor quantum wells

Controlled terms:Electric fields - Light absorption

Uncontrolled terms:Absorption peaks - Dynamical franz-keldysh effects - Intersubband optical absorptions - Intersubband transitions - Probe field - Semiconductor Bloch equations - Tera Hertz - Terahertz fields

Classification code:701.1 Electricity: Basic Concepts and Phenomena - 714.2 Semiconductor Devices and Integrated Circuits - 741.1 Light/Optics

DOI:10.3788/HPLPB20132506.1460

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 100>

 

Accession number:20134216867588

Title:Low repetition rate subnanosecond pulse laser generation from a diode pumped Nd:Lu<inf>3</inf>Al<inf>5</inf>O<inf>12</inf> laser with electro-optic modulator and transmission semiconductor saturable absorber

Authors:Chang, L. (1); Zhao, S.Z. (1); Yang, K.J. (1); Zhao, J. (1); Zheng, L.H. (2); Xu, X.D. (2); Di, J.Q. (2); Xu, J. (2); Wang, Y.G. (3)

Author affiliation:(1) School of Information Science and Engineering, Shandong University, Jinan, Shandong 250100, China; (2) Key Laboratory of Transparent and Opto-functional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 215 Chengbei Road, Shanghai 201800, 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:Zhao, S.Z.(shengzhi_zhao@sdu.edu.cn)

Source title:Journal of the Optical Society of America B: Optical Physics

Abbreviated source title:J Opt Soc Am B

Volume:30

Issue:10

Issue date:October 1, 2013

Publication year:2013

Pages:2710-2714

Language:English

ISSN:07403224

CODEN:JOBPDE

Document type:Journal article (JA)

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

Abstract:By using the dual-loss modulated technology, i.e., adopting the electro-optic (EO) modulator and transmission semiconductor saturable absorber (transmission SSA) simultaneously, a diode-pumped doubly Q-switched and mode-locked (QML) Nd:Lu<sup>3</sup>Al<sup>5</sup>O<sup>12</sup> (Nd:LuAG) laser at 1.06 &mu;m has been realized for the first time. In comparison to the singly passively QML Nd:LuAG laser with transmission SSA, the doubly QML laser can generate more stable pulses with shorter pulse widths and higher peak powers. It can also be observed that the pulse duration of the Q-switched envelope decreases with increasing pump power. When the pump power exceeds 6.52 W for the first time, there is only one mode-locked pulse underneath a Q-switched envelope for this doubly QML Nd:LuAG laser. As a result, the subnanosecond pulse laser with 1 kHz repetition rate of EO and high stability canbe generated. The shortest pulse duration generated is about 718 ps and the highest peak power reaches as high as 502 kW. The experimental results show that Nd:LuAGis an excellent alternative crystal for diode-pumped QML pulsed laser generation. &copy; 2013 Optical Society of America.

Number of references:23

Main heading:Laser power transmission

Controlled terms:Locks (fasteners) - Mode-locked fiber lasers - Modulators - Optical pumping - Pulse generators - Q switching - Saturable absorbers - Semiconductor lasers

Uncontrolled terms:Doubly qml lasers - Electro-optic modulators - Laser generation - Low repetition rate - Mode-locked pulse - Q-switched envelopes - Semiconductor saturable absorbers - Sub-nanosecond pulse

Classification code:601.3 Mechanisms - 713.3 Modulators, Demodulators, Limiters, Discriminators, Mixers - 713.4 Pulse Circuits - 741.1 Light/Optics - 744 Lasers

DOI:10.1364/JOSAB.30.002710

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 101>

 

Accession number:20130215877006

Title:Localized surface waves at the interfzace between a linear dielectric and a photovoltaic-photorefractive crystal

Authors:Li, Kehao (1); Lu, Keqing (1); Zhang, Yiqi (2); Niu, Pingjuan (3); Yu, Liyuan (3); Zhang, Yanpeng (4)

Author affiliation:(1) State Key Laboratory of Transient Optics, Photonics xi'An Institute of Optics and Precision Mechanics, Chinese Academic of Sciences, Xi'an 710119, China; (2) Key Laboratory for Physical Electronics and Devices, Ministry of Education, Xi'An Jiaotong University, Xi'an 710049, China; (3) School of Electronics and Information Engineering, Tianjin Polytechnic University, Tianjin 300160, China; (4) Graduate University of Chinese Academic of Sciences, Beijing 100049, China

Corresponding author:Lu, K.(kqlutj@126.com)

Source title:Optics and Laser Technology

Abbreviated source title:Opt Laser Technol

Volume:48

Issue date:2013

Publication year:2013

Pages:79-82

Language:English

ISSN:00303992

CODEN:OLTCAS

Document type:Journal article (JA)

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

Abstract:We study localized surface waves at the interface between a linear dielectric and a photovoltaic-photorefractive (PP) crystal. These localized surface waves can be established provided that 0&gt;&delta;-b&gt;-&alpha;/2, where &delta; is the guiding parameter, b is the propagation constant, and &alpha; is the parameter related to the wavelength and the PP crystal. We show that when &delta;&gt;0, the part of the energy concentrated in the PP crystal is always higher than that in the linear dielectric and that when &delta;&lt;0, the part of the energy concentrated in the linear dielectric decreases with an increase in b. We find that the part of the energy concentrated in the linear dielectric for &delta;&lt;0 is bigger than that for &delta;&gt;0. Crown Copyright &copy; 2012 Published by Elsevier Ltd. All rights reserved.

Number of references:22

Main heading:Surface waves

Controlled terms:Nonlinear optics - Photoreactivity - Photorefractive crystals

Uncontrolled terms:Linear dielectric - Photorefractive nonlinearity - Propagation constant

Classification code:711 Electromagnetic Waves - 741.1 Light/Optics - 741.1.1 Nonlinear Optics - 751 Acoustics, Noise. Sound - 931 Classical Physics; Quantum Theory; Relativity

DOI:10.1016/j.optlastec.2012.09.021

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 102>

 

Accession number:20133816763222

Title:Column fixed pattern noise correction of the CMOS image sensor based on estimation method

Authors:Wang, Hua (1); Cao, Jianzhong (1); Wang, Huawei (1); Guo, Huinan (1); Zhao, Xiaodong (1); Liu, Guangsen (1)

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

Corresponding author:Wang, H.(s09065@opt.cn)

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

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

Volume:42

Issue:7

Issue date:July 2013

Publication year:2013

Pages:1928-1932

Language:Chinese

ISSN:10072276

Document type:Journal article (JA)

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

Abstract:The column fixed pattern noise (CFPN) of the CMOS image sensors have severe influence on image quality. A column fixed pattern noise correction method for CMOS image sensors was proposed based on the analysis of emerge mechanism, noise characteristic and the behavior in the output image of the fixed pattern noise. It sampled the uniform and parallel light source which radiated from a integrating sphere more times use a CMOS image acquiring system and then estimated the column fixed pattern noise using these images. Then, the estimation result was used to correct the column fixed pattern noise in the CMOS image acquisition system. Experimental results show that with this method, the fixed pattern noise can be effectively reduced and the quality of the image can be increased.

Number of references:9

Main heading:Digital cameras

Controlled terms:CMOS integrated circuits - Estimation - Light sources - Pixels

Uncontrolled terms:CMOS image sensor - Estimation methods - Estimation results - Fixed pattern noise - Image acquisition systems - Integrating spheres - Noise characteristic - Nonuniformity

Classification code:714.2 Semiconductor Devices and Integrated Circuits - 742.2 Photographic Equipment - 921 Mathematics

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 103>

 

Accession number:20130515973985

Title:Simulation of the space turntable angular velocity measurement

Authors:Cui, Kai (1); Liu, Zhaohui (2); Li, Zhiguo (2); Yuan, Hui (1); Liang, Dongsheng (1)

Author affiliation:(1) Graduate University of Chinese Academy of Science, Beijing100049, China; (2) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an710119, China

Corresponding author:Cui, K.(cuik87@163.com)

Source title:Applied Mechanics and Materials

Abbreviated source title:Appl. Mech. Mater.

Volume:246-247

Monograph title:Computer-Aided Design, Manufacturing, Modeling and Simulation II

Issue date:2013

Publication year:2013

Pages:257-261

Language:English

ISSN:16609336

E-ISSN:16627482

ISBN-13:9783037855409

Document type:Conference article (CA)

Conference name:2nd International Conference on Computer-Aided Design, Manufacturing, Modeling and Simulation, CDMMS 2012

Conference date:September 21, 2012 - September 23, 2012

Conference location:Chongqing, China

Conference code:95107

Sponsor:National Natural Science Foundation of China (NSFC)

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

Abstract:For better design and control of the space turntable, a model for measuring its angular velocity was built. The model utilized a two-axis space turntable to perform the simulation basing on the coordinate conversion theory. The measuring simulation went on with the help of MATLAB software using different carrier attitude angles. It shows the maximal error in the sub astral point longitude and/or latitude is 0.00785 degrees when comparing with the STK results, certifying the validity of the models. The satellite attitude angles have influence on the angular velocity, the maximal azimuth angular velocity is 3.784 deg per sec, yet the elevation's is 0.6945 deg per sec when the attitude angles are all 20 degrees. This simulation process provides some guidance for designing, controlling and calibrating the space turntable. &copy; (2013) Trans Tech Publications, Switzerland.

Number of references:11

Main heading:Computer simulation

Controlled terms:Angular velocity - Computer aided design - Computer software - Earth (planet) - Manufacture - MATLAB - Navigation - Velocity measurement

Uncontrolled terms:Attitude angle - Coordinate conversion - Design and control - Matlab- software - Maximal error - Satellite attitude - Simulation process - Two-axis

Classification code:943.3 Special Purpose Instruments - 931.1 Mechanics - 723.5 Computer Applications - 723 Computer Software, Data Handling and Applications - 716.3 Radio Systems and Equipment - 657 Space Physics - 537.1 Heat Treatment Processes

DOI:10.4028/www.scientific.net/AMM.246-247.257

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 104>

 

Accession number:20133816764219

Title:Multiple frequency bands of square split resonant rings and metal wire metamaterial

Authors:Gao, Peng (1); Zhang, Chunmin (1); Ai, Jingjing (1); Kang, Yongqiang (1); Li, Gang (1)

Author affiliation:(1) School of Science, Xi'an Jiaotong University, Xi'an 710049, China; (2) Non-equilibrium Condensed Matter and Quantum Engineering Laboratory, Key Laboratory of the Ministry of Education, Xi'an 710049, China; (3) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an 710119, China

Source title:Applied Optics

Abbreviated source title:Appl. Opt.

Volume:52

Issue:25

Issue date:September 1, 2013

Publication year:2013

Pages:6309-6315

Language:English

ISSN:1559128X

E-ISSN:15394522

CODEN:APOPAI

Document type:Journal article (JA)

Publisher:Optical Society of American (OSA)

Abstract:This work presents experimental measurements of two square split resonant ring and metal wire (SSRR-MW) samples with different cell sizes at microwave frequencies. The geometrical sizes of the metamaterial cells are found to play an important role in the resonant frequency. Cells with different geometrical sizes are chosen to stack into a two-layer or three-layer metamaterial unit to realize the multiple negative passbands. The effective parameters of three separate SSRR-MW models (a one-layer unit, a two-layer unit, and a three-layer unit) are retrieved from the simulation data. The composed models exhibit two or three negative bands by overlapping the passbands of original cells and broadening the overall bandwidth. The recovered parameters show good agreement with the theoretical analysis. &copy; 2013 Optical Society of America.

Number of references:17

Main heading:Cytology

Controlled terms:Cells - Computer simulation - Frequency bands - Metamaterials - Natural frequencies - Wire

Uncontrolled terms:Cell size - Effective parameters - Geometrical sizes - Measurements of - Metal wires - Multiple frequency - Simulation data - Three-layer

Classification code:461.2 Biological Materials and Tissue Engineering - 535.2 Metal Forming - 711.1 Electromagnetic Waves in Different Media - 716.4 Television Systems and Equipment - 723.5 Computer Applications - 951 Materials Science

DOI:10.1364/AO.52.006309

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 105>

 

Accession number:20141317510109

Title:Design of lens-hood in the space fisheye optical system

Authors:Zhu, Qing (1); Zhang, Zhao-Hui (1); Zhang, Zhi (1); Yan, Aqi (1); Cao, Jian-Zhong (1); Zhang, Kai-Sheng (1)

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

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

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8907

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Infrared Imaging and Applications

Issue date:2013

Publication year:2013

Article number:89071A

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497765

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013  -  June 27, 2013

Conference location:Beijing, China

Conference code:100012

Sponsor:Chinese Society of Astronautics; European Optical Society; The Optical Society; The Society of Photo-Optical Instrumentation Engineers (SPIE)

Publisher:SPIE

Abstract:Due to the extra wide field of view, fisheye optical systems are appropriately applied in space camera for scouting large-scale objects with near-distance. At the same time, because of the violent sunlight linger within the field of view more than other optical system and more stray light occur during the period, to design proper lens-hood can effectively reduce the sunshine time. Another distinct characteristic of fisheye optical system is the first protrude lens, which is contrived with negative focus to trace the ray with angle about even above 90 degree of incidence. Consequently, the first lens is in danger of damaging by scratching when operating the camera during the ground experiments without lens-hood. Whereas on account of the huge distortion which is the third mainly characteristic of fisheye optical system, to design appropriate lens-hood is a tough work comparing with other low-distortion optical system, especially for those whose half diagonal field is more than 90&deg;. In this paper, an research carried out on the design lens-hood for fisheye is proposed. In the way of reverse ray-tracing, the location on the first lens and point-vector for each incident ray can be accurately calculated. Thus the incident ray intersecting the first lens corresponds to the boundary of the image sensor form the effective object space. According to the figure of the lens and the incident rays, the lens-hood can be confirmed. In the proposed method, a space fisheye lens is presented as a typical lens, whose horizontal field and vertical field are 134&deg;, diagonal field is up to 192&deg;, respectively. The results of design for the lens-hood show that the lingering time of sunshine is shorten because of obstructing some redundant sunlight, and the first outstanding lens are protected in the most degree. &copy; 2013 Copyright SPIE.

Number of references:9

Main heading:Optical systems

Controlled terms:Cameras - Design - Thermography (imaging)

Uncontrolled terms:Degree of incidence - Fish-eye - Ground experiments - Horizontal fields - Large-scale objects - Lens-hood - Space optical system - Wide field of view

Classification code:408 Structural Design - 741.3 Optical Devices and Systems - 742.1 Photography - 742.2 Photographic Equipment

DOI:10.1117/12.2032304

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 106>

 

Accession number:20141317510156

Title:New scene-based adaptive bad pixel detection algorithm for IRFPA

Authors:Leng, Han-Bing (1); Zhou, Zuo-Feng (1); Liu, Wei (1); Yi, Bo (1); Xie, Qing-Sheng (1); Wu, Deng-Shan (1); Cao, Jian-Zhong (1)

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

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

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8907

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Infrared Imaging and Applications

Issue date:2013

Publication year:2013

Article number:89072T

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497765

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013  -  June 27, 2013

Conference location:Beijing, China

Conference code:100012

Sponsor:Chinese Society of Astronautics; European Optical Society; The Optical Society; The Society of Photo-Optical Instrumentation Engineers (SPIE)

Publisher:SPIE

Abstract:Traditional bad pixel detection algorithm is always based on the radiometric calibration. This method is easy to operate, but only suitable for the bad pixels whose positions are fixed. During the longtime operation period, environment temperature usually has drastic influence on IRFPA, the number of bad pixels often increase and their positions also vary, this result in the degradation of infrared image quality. In this paper, a new scene-based adaptive bad pixel detection algorithm is proposed for IRFPA. The algorithm firstly comparing the pixel value with its neighborhood, and affirm bad pixels preliminary through a suitable threshold. Then the potential bad pixels from different scene are matched, false bad pixels caused by scene and targets are eliminated, real bad pixels are confirmed. The essence of the proposed algorithm is using the correlation between the pixel and its neighborhood. The bad pixels and some targets in the scene have a weak correlation within neighborhoods, and the position of bad pixels varies slowly while the scene varies drastically when IRFPA is in use. This new method can be implemented in hardware easily and achieve the real time demand. With the real infrared images obtained from a camera, the experiment results show the effectiveness of the proposed algorithm. &copy; 2013 Copyright SPIE.

Number of references:10

Main heading:Pixels

Controlled terms:Algorithms - Signal detection - Thermography (imaging)

Uncontrolled terms:Bad pixels - Detection algorithm - Environment temperature - IRFPA - Long-time operation - Radiometric calibrations - Scene-based - Weak correlation

Classification code:716.1 Information Theory and Signal Processing - 723 Computer Software, Data Handling and Applications - 723.5 Computer Applications - 742.1 Photography - 742.2 Photographic Equipment - 921 Mathematics

DOI:10.1117/12.2033162

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 107>

 

Accession number:20141717631768

Title:Complementary projection hashing

Authors:Jin, Zhongming (1); Hu, Yao (1); Lin, Yue (1); Zhang, Debing (1); Lin, Shiding (2); Cai, Deng (1); Li, Xuelong (3)

Author affiliation:(1) State Key Lab of CAD and CG, College of Computer Science, Zhejiang University, Hangzhou, China; (2) Baidu, Inc., Beijing, China; (3) Center for OPTical IMagery Analysis and Learning (OPTIMAL), State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Xi'an 710119, Shaanxi, China

Source title:Proceedings of the IEEE International Conference on Computer Vision

Abbreviated source title:Proc IEEE Int Conf Comput Vision

Monograph title:Proceedings - 2013 IEEE International Conference on Computer Vision, ICCV 2013

Issue date:2013

Publication year:2013

Pages:257-264

Article number:6751141

Language:English

CODEN:PICVES

ISBN-13:9781479928392

Document type:Conference article (CA)

Conference name:2013 14th IEEE International Conference on Computer Vision, ICCV 2013

Conference date:December 1, 2013  -  December 8, 2013

Conference location:Sydney, NSW, Australia

Conference code:104551

Sponsor:APRS; Australian National University; CVF; et al.; IEEE Computer Society; NICTA

Publisher:Institute of Electrical and Electronics Engineers Inc.

Abstract:Recently, hashing techniques have been widely applied to solve the approximate nearest neighbors search problem in many vision applications. Generally, these hashing approaches generate 2c buckets, where c is the length of the hash code. A good hashing method should satisfy the following two requirements: 1) mapping the nearby data points into the same bucket or nearby (measured by the Hamming distance) buckets. 2) all the data points are evenly distributed among all the buckets. In this paper, we propose a novel algorithm named Complementary Projection Hashing (CPH) to find the optimal hashing functions which explicitly considers the above two requirements. Specifically, CPH aims at sequentially finding a series of hyper planes (hashing functions) which cross the sparse region of the data. At the same time, the data points are evenly distributed in the hyper cubes generated by these hyper planes. The experiments comparing with the state-of-the-art hashing methods demonstrate the effectiveness of the proposed method. &copy; 2013 IEEE.

Number of references:29

Main heading:Hamming distance

Controlled terms:Algorithms

Uncontrolled terms:Approximate nearest neighbor - Approximate Nearest Neighbor Search - Hashing - Hashing functions - Hashing techniques - Novel algorithm - Search problem - Vision applications

Classification code:723 Computer Software, Data Handling and Applications - 921 Mathematics - 921.6 Numerical Methods

DOI:10.1109/ICCV.2013.39

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 108>

 

Accession number:20141317510148

Title:Calculation of signal-to-noise ratio (SNR) of infrared detection system based on MODTRAN model

Authors:Lu, Xue (1); Li, Chuang (1); Fan, Xuewu (1)

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

Corresponding author:Li, C.

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

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8907

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Infrared Imaging and Applications

Issue date:2013

Publication year:2013

Article number:89072K

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497765

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013  -  June 27, 2013

Conference location:Beijing, China

Conference code:100012

Sponsor:Chinese Society of Astronautics; European Optical Society; The Optical Society; The Society of Photo-Optical Instrumentation Engineers (SPIE)

Publisher:SPIE

Abstract:Signal-to-noise ratio (SNR) is an important parameter of infrared detection system. SNR of infrared detection system is determined by the target infrared radiation, atmospheric transmittance, background infrared radiation and the detector noise. The infrared radiation flux in the atmosphere is determined by the selective absorption of the gas molecules, the atmospheric environment, and the transmission distance of the radiation, etc, so the atmospheric transmittance and infrared radiance flux are intricate parameters. A radiometric model for the calculation of SNR of infrared detection system is developed and used to evaluate the effects of various parameters on signal-to-noise ratio (SNR). An atmospheric modeling tool, MODTRAN, is used to model wavelength-dependent atmospheric transmission and sky background radiance. Then a new expression of SNR is deduced. Instead of using constants such as average atmospheric transmission and average wavelength in traditional method, it uses discrete values for atmospheric transmission and sky background radiance. The integrals in general expression of SNR are converted to summations. The accuracy of SNR obtained from the new method can be improved. By adopting atmospheric condition of the 1976 US standard, no clouds urban aerosols, fall-winter aerosol profiles, the typical spectrum characters of sky background radiance and transmittance are computed by MODTRON. Then the operating ranges corresponding to the threshold quantity of SNR are calculated with the new method. The calculated operating ranges are more close to the measured operating range than those calculated with the traditional method. &copy; 2013 Copyright SPIE.

Number of references:8

Main heading:Signal to noise ratio

Controlled terms:Atmospheric aerosols - Detectors - Infrared detectors - Infrared radiation - Light transmission - Thermography (imaging)

Uncontrolled terms:Atmospheric conditions - Atmospheric environment - Atmospheric transmissions - Atmospheric transmittance - MODTRAN - Signaltonoise ratio (SNR) - Sky background - SNR

Classification code:716.1 Information Theory and Signal Processing - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 742.1 Photography - 804.1 Organic Compounds - 914 Safety Engineering - 914.1 Accidents and Accident Prevention

DOI:10.1117/12.2033048

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 109>

 

Accession number:20141317516381

Title:Design of camera and spectrometer dual-use system

Authors:Qi, Yong-Hong (1); Xue, Bin (1); Zhao, Yi-Yi (1); Tao, Jin-You (1)

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

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

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8910

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Imaging Spectrometer Technologies and Applications

Issue date:2013

Publication year:2013

Article number:891014

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497796

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013  -  June 27, 2013

Conference location:Beijing, China

Conference code:100012

Sponsor:Chinese Society of Astronautics; European Optical Society; The Optical Society; The Society of Photo-Optical Instrumentation Engineers (SPIE)

Publisher:SPIE

Abstract:Imaging spectrometers based on prism-grating-prism (PGP) have advantage of direct vision, as a basis for the design of an optical system for a spectrometer and camera dual-use, the system can plug the light splitting element to switch between the spectrometer and camera. This paper has discussed the working principles and structure of the PGP and spectrometer, collimating and focusing lens design principles, then the design result has been presented. The spectral range of the system is 400-800nm, the pixel size of CCD used is 10um &times; 10um, 1010 &times; 1018 pixels, the object space numerical aperture is 0.1. In order to reduce the cost and eliminate aberration, collimating lens and focusing lens have symmetric structure, in order to improve the diffraction efficiency, PGP uses the volume phase holographic transmission grating. After optimization the design by ZEMAX software, the whole spectral range resolution is better than 1nm in average, the MTF at Nyquist frequency is greater than 0.7, the length of the whole system is 87mm. &copy; 2013 SPIE.

Number of references:7

Main heading:Spectrometers

Controlled terms:Cameras - Optical design - Optical systems - Pixels - Prisms

Uncontrolled terms:Collimating lens - Imaging spectrometers - Light splitting - Numerical aperture - Nyquist frequency - Prism-Grating-Prism - Symmetric structures - Volume Phase Holographic

Classification code:741.1 Light/Optics - 741.3 Optical Devices and Systems - 742.2 Photographic Equipment

DOI:10.1117/12.2033622

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 110>

 

Accession number:20141117450328

Title:Image super-resolution via double sparsity regularized manifold learning

Authors:Lu, Xiaoqiang (1); Yuan, Yuan (1); Yan, Pingkun (1)

Author affiliation:(1) Center for Optical Imagery Analysis and Learning, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

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

Abbreviated source title:IEEE Trans Circuits Syst Video Technol

Volume:23

Issue:12

Issue date:December 2013

Publication year:2013

Pages:2022-2033

Article number:6428635

Language:English

ISSN:10518215

CODEN:ITCTEM

Document type:Journal article (JA)

Publisher:Institute of Electrical and Electronics Engineers Inc.

Abstract:Over the past few years, high resolutions have been desirable or essential, e.g., in online video systems, and therefore, much has been done to achieve an image of higher resolution from the corresponding low-resolution ones. This procedure of recovering/rebuilding is called single-image super-resolution (SR). Performance of image SR has been significantly improved via methods of sparse coding. That is to say, the image frame patch can be sparse linear combinations of basis elements. However, most of these existing methods fail to consider the local geometrical structure in the space of the training data. To take this crucial issue into account, this paper proposes a method named double sparsity regularized manifold learning (DSRML). DSRML can preserve the properties of the aforementioned local geometrical structure by employing manifold learning, e.g., locally linear embedding. Based on a large amount of experimental results, DSRML is demonstrated to be more robust and more effective than previous efforts in the task of single-image SR. &copy; 2013 IEEE.

Number of references:43

Main heading:Image coding

Controlled terms:Geometry - Online systems - Optical resolving power

Uncontrolled terms:Double sparsity - Geometrical structure - Image super-resolution - Linear combinations - Locally linear embedding - Manifold learning - Sparse coding - Superresolution

Classification code:722.4 Digital Computers and Systems - 741 Light, Optics and Optical Devices - 741.1 Light/Optics - 921 Mathematics

DOI:10.1109/TCSVT.2013.2244798

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 111>

 

Accession number:20142817926612

Title:Mid-infrared fluorotellurite glasses and fibers

Authors:Zhan, Huan (1); Zhang, Aidong (1); He, Jianli (1); Zhou, Zhiguang (1); Li, Lu (1); Lin, Aoxiang (1)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences (CAS), Xi'an 710119, China; (2) Graduate School, Chinese Academy of Sciences (CAS), Beijing 100049, China

Corresponding author:Lin, A.(aoxiang@opt.ac.cn)

Source title:2013 Conference on Lasers and Electro-Optics, CLEO 2013

Abbreviated source title:Conf. Lasers Electro-Opt., CLEO

Monograph title:2013 Conference on Lasers and Electro-Optics, CLEO 2013

Issue date:2013

Publication year:2013

Article number:6833934

Language:English

ISBN-13:9781557529725

Document type:Conference article (CA)

Conference name:2013 Conference on Lasers and Electro-Optics, CLEO 2013

Conference date:June 9, 2013  -  June 14, 2013

Conference location:San Jose, CA, United states

Conference code:106048

Publisher:IEEE Computer Society

Abstract:We report on the fabrication and characterization of rare earth ions-doped water-free fluorotellurite glasses and fibers. For 2.8 mm glass fiber rods, its background loss was -12 dB/m in the range of 2.5-4.2 urn. &copy; 2013 The Optical Society.

Number of references:5

Main heading:Glass

Controlled terms:Metal ions

Uncontrolled terms:Background loss - Fabrication and characterizations - Fluoro-tellurite glass - Midinfrared

Classification code:533 Ore Treatment and Metal Refining - 812.3 Glass

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 112>

 

Accession number:20141317521645

Title:The research of relay lens coupling in image intensified camera

Authors:Sun, Xin (1); Hu, Bing-Liang (1); Zou, Chun-Bo (1); Bai, Qing-Lan (1); Wang, Le (1)

Author affiliation:(1) Key Laboratory of Spectral Imaging Technology, Institute of Optics and Precision Mechanics, CAS, Xi'an 710119, China

Corresponding author:Sun, X.

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

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8912

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Low-Light-Level Technology and Applications

Issue date:2013

Publication year:2013

Article number:89121E

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497819

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013  -  June 27, 2013

Conference location:Beijing, China

Conference code:100012

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

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

Abstract:Image Intensified CCD (ICCD) camera is widely used in the field of low-light-level image detection. The crucial part of ICCD, coupling component, which realizes the image transmitting between the image intensifier and detector, affects the final performance of the ICCD camera significantly. There are two means of coupling: relay lens and optical fiber taper (OFT). OFT has the merits of small volume and relatively high coupling efficiency, therefore it is commonly used in the portable devices or applications with less precision demands. However, relay lens turns out to be a better solution other than OFT for the applications with no volume and weight restrictions, since it provides higher resolution, perfect image plane uniformity and manufacture flexibility. In this paper, we discuss a methodology of high performance relay lens design and based on the method a solid design is proposed. There are three major merits of the lens design. Firstly, the lens has large object space numerical aperture and thus the coupling efficiency reaches 5% at the magnification of 0.25. Secondly, the lens is telecentric in both sides of object space and image space, this feature guarantees uniform light collection over the field of view and uniform light receiving on the detector plane. Finally, the design can be conveniently optimized to meet the needs of different type of image intensifier. Moreover, the paper presents a prototype ICCD camera and a series of imaging experiment as well. The experiment results prove the validity of the foregoing analysis and optical design. &copy; 2013 SPIE.

Number of references:6

Main heading:Cameras

Controlled terms:Detectors - Image intensifiers (solid state) - Optical design - Optical fibers - Optical instrument lenses

Uncontrolled terms:Coupling efficiency - Image-intensified camera - Imaging experiments - Low-light-level - Low-light-level image - Optical fiber tapers - Relay lens - Weight restriction

Classification code:714.2 Semiconductor Devices and Integrated Circuits - 741 Light, Optics and Optical Devices - 742.2 Photographic Equipment - 914 Safety Engineering

DOI:10.1117/12.2034709

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 113>

 

Accession number:20132616448231

Title:Experimental research of high gain and low noise figure optical amplifier based on erbium-doped fiber

Authors:Zhang, Kewei (1); Zhao, Wei (1); Xie, Xiaoping (1); Wang, Wei (1); Qian, Fengchen (1); Han, Biao (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) University of Chinese Academy of Sciences, Beijing 100049, China; (3) Xi'an Communication College, Xi'an, Shaanxi 710106, China

Corresponding author:Zhang, K.(zhangkewei@opt.cn)

Source title:Guangxue Xuebao/Acta Optica Sinica

Abbreviated source title:Guangxue Xuebao

Volume:33

Issue:5

Issue date:May 2013

Publication year:2013

Article number:0506003

Language:Chinese

ISSN:02532239

CODEN:GUXUDC

Document type:Journal article (JA)

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

Abstract:Considering the trade-off between the high gain and low noise figure in optical amplifier, a two-stage amplifier which has the structure to suppress the forward and backward-travelling amplified spontaneous emission noise with high gain and low noise figure based on Erbium-doped fiber is set up. Interpolation is used to test the power of amplified spontaneous emission (ASE) noise accurately. The gain and noise figures and some other parameters of the amplifier are analyzed. Comparison between the erbium-doped fiber amplifer (EDFA) and the commercial low noise EDFA is carried out. The results show that the highest gain of the EDFA in the experiment is 40.1 dB and the noise figure is 3.8 dB which is 0.8 dB above quantum-limit. The results when testing the amplifier and commercial EDFA in the same input power and gain show that the noise figure of the amplifier is 0.3 dB lower than the commercial EDFA.

Number of references:20

Main heading:Amplifiers (electronic)

Controlled terms:Fibers - Light amplifiers - Noise figure - Optical communication - Optical switches - Spontaneous emission

Uncontrolled terms:Amplified spontaneous emission noise - Amplified spontaneous emissions - Erbium doped fibers - Experimental research - Input power - Low noise - Low noise figure - Two-stage amplifiers

Classification code:817 Plastics and Other Polymers: Products and Applications - 812 Ceramics, Refractories and Glass - 741.3 Optical Devices and Systems - 717.1 Optical Communication Systems - 713.1 Amplifiers - 713 Electronic Circuits - 711 Electromagnetic Waves

DOI:10.3788/AOS201333.0506003

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 114>

 

Accession number:20134316874279

Title:Advanced transient thermoreflectance 2D imaging for integrated circuit sub-micron defect detection and thermal analysis

Authors:Yazawa, Kazuaki (1); Kendig, Dustin (1); Zhang, Yan (2); Shakouri, Ali (3)

Author affiliation:(1) Microsanj, LLC., Santa Clara, CA, United States; (2) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (3) Birck Nanotechnology Center, Purdue University, West Lafayette, IN, United States

Source title:Proceedings of the International Symposium on the Physical and Failure Analysis of Integrated Circuits, IPFA

Abbreviated source title:Proc Int Symp Phys Failure Anal Integr Circuits IPFA

Monograph title:Proceedings of the 2013 20th IEEE International Symposium on the Physical and Failure Analysis of Integrated Circuits, IPFA 2013

Issue date:2013

Publication year:2013

Pages:127-131

Article number:6599139

Language:English

ISBN-13:9781479912414

Document type:Conference article (CA)

Conference name:2013 20th IEEE International Symposium on the Physical and Failure Analysis of Integrated Circuits, IPFA 2013

Conference date:July 15, 2013 - July 19, 2013

Conference location:Suzhou, China

Conference code:100081

Sponsor:IEEE Nanjing Section ED/SSC Joint Chapter; FEI Company; Digit Concept; Hanwa; WinTech

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

Abstract:Transient thermoreflectance 2D thermal imaging is rapidly proving to be an effective technique for meeting the thermal analysis challenges inherent with today's advanced high speed integrated circuits. Using near infrared light illumination is particularly suitable for the thermal imaging of flip chip mounted devices and silicon substrate chips. High speed transient imaging reveals the timing of heating the spots in the circuit to identify if it is designed or unintended heating. Time-dependent unusual thermal signals provide the information of the depth location of a failure by knowing the time delay underneath the opaque layers. &copy; 2013 IEEE.

Number of references:8

Main heading:Integrated circuits

Controlled terms:Defects - Delay circuits - Failure analysis - Flip chip devices - Infrared imaging - Thermoanalysis - Timing circuits - Transients

Uncontrolled terms:2-d imaging - Defect detection - High-speed integrated circuits - Near infrared light - Silicon substrates - Thermal signals - Thermoreflectance - Transient thermoreflectance

Classification code:921 Mathematics - 801 Chemistry - 746 Imaging Techniques - 714.2 Semiconductor Devices and Integrated Circuits - 951 Materials Science - 713.5 Electronic Circuits Other Than Amplifiers, Oscillators, Modulators, Limiters, Discriminators or Mixers - 621 Nuclear Reactors - 423 Non Mechanical Properties and Tests of Building Materials - 421 Strength of Building Materials; Mechanical Properties - 713.4 Pulse Circuits

DOI:10.1109/IPFA.2013.6599139

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 115>

 

Accession number:20134216857663

Title:Field-programmable gate array-based hardware architecture for high-speed camera with KAI-0340 CCD image sensor

Authors:Wang, Hao (1); Yan, Su (1); Zhou, Zuofeng (1); Cao, Jianzhong (1); Yan, Aqi (1); Tang, Liniao (1); Lei, Yangjie (1)

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

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

Abbreviated source title:Proc SPIE Int Soc Opt Eng

Volume:8908

Monograph title:International Symposium on Photoelectronic Detection and Imaging 2013: Imaging Sensors and Applications

Issue date:2013

Publication year:2013

Article number:890811

Language:English

ISSN:0277786X

E-ISSN:1996756X

CODEN:PSISDG

ISBN-13:9780819497772

Document type:Conference article (CA)

Conference name:5th International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013

Conference date:June 25, 2013 - June 27, 2013

Conference location:Beijing, China

Conference code:100012

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

Abstract:We present a field-programmable gate array (FPGA)-based hardware architecture for high-speed camera which have fast auto-exposure control and colour filter array (CFA) demosaicing. The proposed hardware architecture includes the design of charge coupled devices (CCD) drive circuits, image processing circuits, and power supply circuits. CCD drive circuits transfer the TTL (Transistor-Transistor-Logic) level timing Sequences which is produced by image processing circuits to the timing Sequences under which CCD image sensor can output analog image signals. Image processing circuits convert the analog signals to digital signals which is processing subsequently, and the TTL timing, auto-exposure control, CFA demosaicing, and gamma correction is accomplished in this module. Power supply circuits provide the power for the whole system, which is very important for image quality. Power noises effect image quality directly, and we reduce power noises by hardware way, which is very effective. In this system, the CCD is KAI-0340 which is can output 210 full resolution frame-per-second, and our camera can work outstandingly in this mode. The speed of traditional auto-exposure control algorithms to reach a proper exposure level is so slow that it is necessary to develop a fast auto-exposure control method. We present a new auto-exposure algorithm which is fit high-speed camera. Color demosaicing is critical for digital cameras, because it converts a Bayer sensor mosaic output to a full color image, which determines the output image quality of the camera. Complexity algorithm can acquire high quality but cannot implement in hardware. An low-complexity demosaicing method is presented which can implement in hardware and satisfy the demand of quality. The experiment results are given in this paper in last. &copy; 2013 SPIE.

Number of references:11

Main heading:Power supply circuits

Controlled terms:Algorithms - Analog circuits - Charge coupled devices - Color image processing - Exposure controls - Field programmable gate arrays (FPGA) - Hardware - High speed cameras - Image quality - Image sensors  - Sensors - Signal detection - Timing circuits

Uncontrolled terms:Auto exposure - CCD image sensors - Color demosaicing - Complexity algorithms - Full color images - Full resolutions - Hardware architecture - Processing circuits

Classification code:921 Mathematics - 801 Chemistry - 742.2 Photographic Equipment - 742.1 Photography - 741 Light, Optics and Optical Devices - 723 Computer Software, Data Handling and Applications - 721.3 Computer Circuits - 716.1 Information Theory and Signal Processing - 714.2 Semiconductor Devices and Integrated Circuits - 713 Electronic Circuits - 605 Small Tools and Hardware

DOI:10.1117/12.2033013

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 116>

 

Accession number:20133016530607

Title:Research of a new all-optical solid-state scanner based on GaAs

Authors:Xu, Guo Ya (1); He, Jun Hua (1); Sen, Fan (1); Zhu, Yuan Tao (1)

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

Source title:Advanced Materials Research

Abbreviated source title:Adv. Mater. Res.

Volume:710

Monograph title:Advanced Technologies and Solutions in Industry

Issue date:2013

Publication year:2013

Pages:269-272

Language:English

ISSN:10226680

ISBN-13:9783037857205

Document type:Conference article (CA)

Conference name:2013 International Conference on Advanced Technologies and Solutions in Industry, ICATSI 2013

Conference date:March 22, 2013 - March 23, 2013

Conference location:Taiyuan, Shanxi, China

Conference code:97849

Publisher:Trans Tech Publications Ltd, Kreuzstrasse 10, Zurich-Durnten, CH-8635, Switzerland

Abstract:Design an all-optical solid-state scanner chip, which can realize high speed light deflection in a very small space, instead of electron beam deflection scan image converter tube and opto-mechanical scanner, cancel the complicated mechanical components, use the all-optical scanning to realize the super fast phenomenon observation. The beam deflection system is based on semiconductor optical waveguide core layer carrier induced refractive index change effect to realize, its development work is mainly divided into semiconductor optical waveguide and saw prisms two parts. And through the experiment, we measured deflection angle of the scanner chip to 1053nm signal light. &copy; (2013) Trans Tech Publications, Switzerland.

Number of references:8

Main heading:Scanning

Controlled terms:Gallium arsenide - Laser recording - Optical waveguides - Product design - Semiconducting gallium - Semiconductor materials

Uncontrolled terms:All-optical scanner - Beam deflection - Deflection angles - Electron beam deflection - GaAs - Light deflection - Mechanical components - Opto-mechanical scanners

Classification code:712.1 Semiconducting Materials - 712.1.1 Single Element Semiconducting Materials - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 804 Chemical Products Generally - 913.1 Production Engineering

DOI:10.4028/www.scientific.net/AMR.710.269

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 117>

 

Accession number:20140917407639

Title:Research on detection and correction of defective pixels of LASIS

Authors:Jing, Juanjuan (1); Lv, Qunbo (1); Shi, Dalian (2)

Author affiliation:(1) Academy of Opto-Electronics, Chinese Academy of Sciences(CAS), Beijing, China; (2) Key Lab. of Spectral Imaging Technology, Xi'An Institute of Optics and Precision Mechanics, CAS, China

Source title:IST 2013 - 2013 IEEE International Conference on Imaging Systems and Techniques, Proceedings

Abbreviated source title:IST - IEEE Int. Conf. Imaging Syst. Tech., Proc.

Monograph title:IST 2013 - 2013 IEEE International Conference on Imaging Systems and Techniques, Proceedings

Issue date:2013

Publication year:2013

Pages:7-10

Article number:6729652

Language:English

ISBN-13:9781467357906

Document type:Conference article (CA)

Conference name:2013 IEEE International Conference on Imaging Systems and Techniques, IST 2013

Conference date:October 22, 2013  -  October 23, 2013

Conference location:Beijing, China

Conference code:102804

Publisher:IEEE Computer Society, 2001 L Street N.W., Suite 700, Washington, DC 20036-4928, United States

Abstract:Due to the imperfections in producing, a finite number of pixels in an array will be defective. Regarding a Fourier transform Imaging spectrometer, the existence of defective pixels will not only affect the quality of the image, but also cause interferogram extraction error, and then result in a distortion of the reconstructed spectrum. So the defective pixels must be accurately distinguished and eliminated by data processing. In this paper, according to the characteristic of the Fourier transform Imaging spectrometer, a distinguishing and eliminating method is carried out. The Fourier transform Imaging spectrometer is illuminated by a uniform light. The data is fitted in the spatial dimension; the error between the actual data and the fitted data is computed and divided by the standard deviation. By choosing a proper threshold value, the cold, hot and non-saturated pixels can be effectively distinguished. Single defective pixels can be effectively corrected by spatial dimension interpolating; for clustered defective pixels, spatial dimension interpolating and interference dimension fitting are taken and the result is averaged. The experimental result proves that this method is effective and also efficient both for uniform light illuminated data and push broom data. &copy; 2013 IEEE.

Number of references:10

Main heading:Pixels

Controlled terms:Data processing - Imaging systems - Interferometry - Interpolation - Spectrometers

Uncontrolled terms:Data fittings - Finite number - Fourier transform imaging spectrometers - Interferograms - interpolating - Spatial dimension - Standard deviation

Classification code:723.2 Data Processing and Image Processing - 723.5 Computer Applications - 801 Chemistry - 921.6 Numerical Methods - 941.4 Optical Variables Measurements

DOI:10.1109/IST.2013.6729652

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 118>

 

Accession number:20134016793882

Title:Wide-range continuously-tunable slow-light delay line based on stimulated brillouin scattering

Authors:Ju, Haijuan (1); Ren, Liyong (1); Lin, Xiao (1); Liang, Jian (1); Ma, Chengju (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

Source title:IEEE Photonics Technology Letters

Abbreviated source title:IEEE Photonics Technol Lett

Volume:25

Issue:19

Issue date:2013

Publication year:2013

Pages:1920-1923

Article number:6582552

Language:English

ISSN:10411135

CODEN:IPTLEL

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:Through selectively controlling the stimulated Brillouin scattering in optical fibers with different lengths, a continuously tunable time-delay scheme enabling to work in a large range is proposed in this letter. This is realized by connecting a fixed long single-mode fiber (SMF) to one of the several selectable short SMFs that successively have an equal increment in length. These short-length fibers are, respectively, fixed to the different channels between two identical optical switches. Therefore, a wide-range and continuously tunable slow-light delay line can be constructed by changing the power of the pump beam, assisted by switching to different channels. In the experiment, a time delay from 0 to 201.29 ns is demonstrated for a five-channel configuration. A further large-range time delay can be expected if one adds the number of channels accordingly. &copy; 2013 IEEE.

Number of references:20

Main heading:Slow light

Controlled terms:Optical fibers - Single mode fibers - Stimulated Brillouin scattering - Time delay - Waves

Uncontrolled terms:Optical delay lines - Pump beams - Slow-light delay - Stimulated Brillouin Scattering (SBS)

Classification code:713 Electronic Circuits - 731 Automatic Control Principles and Applications - 741.1 Light/Optics - 741.1.2 Fiber Optics

DOI:10.1109/LPT.2013.2278536

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 119>

 

Accession number:20131516200535

Title:A compact interferometer insensitive to scanning speed variations

Authors:Yang, Qinghua (1); Zhao, Baochang (2); Zeng, Xiaodong (1)

Author affiliation:(1) School of Technical Physics, Xidian University, Xi'an 710071, China; (2) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China

Corresponding author:Yang, Q.(yangqh666@163.com)

Source title:Chinese Optics Letters

Abbreviated source title:Chin. Opt. Lett.

Volume:11

Issue:2

Issue date:February 2013

Publication year:2013

Article number:021202

Language:English

ISSN:16717694

Document type:Journal article (JA)

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

Abstract:A compact moving optical-wedge interferometer (CMOWI) is presented. This device consists of a moving optical wedge (MOW), a fixed optical wedge (FOW), a fixed compensating plate, and a beam-splitting cube. The optical path difference (OPD) is calculated and analyzed. The factor between the OPD and the displacement of the MOW is less than 1 if the refractive index and wedge angle of the MOW and FOW are chosen properly. Therefore, the CMOWI is insensitive to scanning speed variations compared with the traditional Michelson interferometer. The CMOWI is compact, small-sized, and suitable for low-resolution Fourier transform spectroscopy. &copy; 2013 Chinese Optics Letters.

Number of references:7

Main heading:Refractive index

Controlled terms:Michelson interferometers

Uncontrolled terms:Beam-splitting cubes - Compact interferometer - Fourier transform spectroscopy - Low resolution - Optical path difference - Optical wedges - Scanning speed - Wedge angle

Classification code:741.1 Light/Optics - 941.3 Optical Instruments

DOI:10.3788/COL201311.021202

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 120>

 

Accession number:20134616987924

Title:Adaptive cancellation of light relative intensity noise for fiber optic gyroscope

Authors:Ji, Zhongxiao (1)

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

Corresponding author:Ji, Z.(wnq_8510@163.com)

Source title:Telkomnika - Indonesian Journal of Electrical Engineering

Abbreviated source title:Telkomnika Indonesian J. Elect. Eng.

Volume:11

Issue:12

Issue date:December 2013

Publication year:2013

Pages:7490-7499

Language:English

ISSN:23024046

E-ISSN:2087278X

Document type:Journal article (JA)

Publisher:Universitas Ahmad Dahlan, Jalan Kapas 9, Semaki, Umbul Harjo,, Yogiakarta, 55165, Indonesia

Abstract:In order to reduce the relative intensity noise (RIN) in the interferometric signal of the fiber opticgyroscope (FOG), an adaptive noise subtraction method is presented, which aims to overcome to the drawbacks that the fixed delay time and gain of the digital noise subtraction method. The drawbacks willmake the performance of FOG to be degraded greatly in the changing environment. In the paper theadaptive noise subtraction system based on the recursive least squares algorithm (RLS) is formed inFPGA, in which the interferometric signal is regarded as the signal source, and RIN in the free end of theoptical fiber coupler of FOG is looked as the noise reference signal. The two critical parameters that minimum delay time and its varying range result from measuring the minimum and maximum delay times of the interferometric signal in a certain temperature range. The off-line and on-line temperature experimental results verify the capability of adapting to the environmental temperature. &copy; 2013 Universitas Ahmad Dahlan.

Number of references:13

Main heading:Gyroscopes

Controlled terms:Fiber optics

Uncontrolled terms:Adaptive cancellation - Changing environment - Environmental temperature - Fiber optic gyroscopes - Interferometric signals - Recursive least square (RLS) - Recursive least squares algorithms - Relative intensity noise

Classification code:741.1.2 Fiber Optics - 943.1 Mechanical Instruments

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 121>

 

Accession number:20131616218928

Title:Image fusion of tempo-spatially modulated polarization interference imaging spectrometer

Authors:Zhang, Chunmin (1); Cao, Qizhi (1); Jian, Xiaohua (4); Ren, Wenyi (1); Zhang, Jing (3)

Author affiliation:(1) Xi'an Jiaotong University School of Science, Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Ministry of Education, Xi'an 710049, China; (2) Spatial Optics Department, Xi'an Institute of Optics and Precision Mechanics, Academia Sinica, Xi'an 710048, China; (3) School of Physics and Electronic Information Science, Guangxi Teachers College, Nanning 530023, China; (4) Suzhou Institute of Biomedical Engineering and Technology, CAS, Suzhou 215163, China

Corresponding author:Zhang, C.(zcm@mail.xjtu.edu.cn)

Source title:Optics Communications

Abbreviated source title:Opt Commun

Volume:297

Issue date:June 15, 2013

Publication year:2013

Pages:12-19

Language:English

ISSN:00304018

CODEN:OPCOB8

Document type:Journal article (JA)

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

Abstract:The space-based tempo-spatially modulated polarization interferometer imaging spectrometer (TSMPIIS) scans over an observed area, and acquires the image-spectrum data cubic consisting of a series of the CCD images taken at different times. Every pixel on the CCD image records interferographs with different optical path differences, corresponding to the incident angles changing from maximum, via zero, and finally to negative maximum. To improve the spatial resolution of the color comprised image acquired by TSMPIIS, the panchromatic (PAN) image of high spatial resolution is fused with the color composite image of high spectrum resolution to produce the fused image of both high spatial and spectrum resolution. Based on the characteristics of the TSMPIIS image data, the FFT (fast Fourier transform)-enhanced IHS (intensity-hue-saturation) transform method is used and compared with IHS and WT (wave transform) methods. The experimental results show that the FFT-enhanced IHS method can establish very good trade-off between spatial and spectral quality of the fused image and largely improve the spatial resolution of the color composite image. The fusion method significantly enhances the instrument performance at very low cost. &copy; 2013 Elsevier B.V.

Number of references:23

Main heading:Spectrometers

Controlled terms:Color - Fast Fourier transforms - Fusion reactions - Image fusion - Image resolution

Uncontrolled terms:FFT (fast Fourier transform) - Filter - High spatial resolution - Intensity hue saturations - Optical path difference - Panchromatic (Pan) image - Polarization interferences - Polarization interferometer

Classification code:621.2 Fusion Reactors - 723.2 Data Processing and Image Processing - 741.1 Light/Optics - 801 Chemistry - 921.3 Mathematical Transformations

DOI:10.1016/j.optcom.2013.01.041

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 122>

 

Accession number:20134316876168

Title:Two approaches to improve FPGA performance for the stereo camera of the chang'e-1 satellite

Authors:Duan, Yongqiang (1); Wen, Desheng (1); Gao, Wei (1); Zhao, Baochang (1)

Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, Shaanxi, 710119, China; (2) University of Chinese Academy of Sciences (CAS), Beijing. Mailing Address: No. 17 Xinxi Road, New Industrial Park, Xi'an Hi-Tech Industrial Development Zone, Xi'an, Shaanxi, 710119, China

Source title:IEEE Aerospace and Electronic Systems Magazine

Abbreviated source title:IEEE Aerosp Electron Syst Mag

Volume:28

Issue:9

Issue date:2013

Publication year:2013

Pages:16-29

Article number:6617095

Language:English

ISSN:08858985

CODEN:IESMEA

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:The CE-1 satellite was successfully launched on October 24, 2007, and was guided to crash-land on the Moon on March 1, 2009. The FPGA of the CCD stereo camera operated more than 1 year without faults, exceeding the expected life span by about 4 months. The first lunar image from CE-1 was obtained on November 20 and November 21, 2007, and was released on November 26, 2007 (Figure 14). A three-dimensional image was acquired by processing at the same time and released on November 26, 2007 (Figure 15). The raw data obtained by the CCD stereo camera included 508 orbit images between the latitudes of 70&deg;N and 70&deg;S and 589 polar orbit images. Many scientific results have been obtained by analyzing these data [26], especially the &iquest;global lunar image from the first Chinese lunar exploration mission&iquest; in [27]. The results of the onboard flight validate that the FPGA design of the CCD stereo camera is reasonable and reliable and has achieved the mission requirements. &copy; 1986-2012 IEEE.

Number of references:27

Main heading:CCD cameras

Controlled terms:Moon

Uncontrolled terms:Expected life - Exploration missions - FPGA design - Mission requirements - Polar orbit - Scientific results - Stereo cameras - Three dimensional images

Classification code:657.2 Extraterrestrial Physics and Stellar Phenomena - 714.2 Semiconductor Devices and Integrated Circuits

DOI:10.1109/MAES.2013.6617095

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 123>

 

Accession number:20131516188564

Title:Crystallization and absorption properties of novel photo-thermal refractive glasses with the addition of B<inf>2</inf>O<inf>3</inf>

Authors:Wang, Pengfei (1); Lu, Min (1); Li, Weinan (1); Gao, Fei (1); Peng, Bo (1)

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

Corresponding author:Peng, B.(bpengcas@yahoo.cn)

Source title:Journal of Non-Crystalline Solids

Abbreviated source title:J Non Cryst Solids

Volume:368

Issue:1

Issue date:2013

Publication year:2013

Pages:55-62

Language:English

ISSN:00223093

CODEN:JNCSBJ

Document type:Journal article (JA)

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

Abstract:A new boron-containing photo-thermal-refractive (boron-PTR) glass was prepared by two-step melt-quenching techniques at relative lower glass melting temperature. The influence of Ag<sup>+</sup> doping concentration, UV exposure dosage and thermal development parameters on the boron-PTR glass' spectroscopic absorption and crystallization property were investigated and compared with that of the known boron-free PTR glass explored by L. B. Glebov et al. The introduction of B<inf>2</inf>O<inf>3</inf>, to some extent, can increase the strength of the silicate bonding thus preventing the liquid-liquid phase separation in this new PTR system when compared to the boron-free PTR system. The developed boron-PTR glass with the processing of 15 s-UV exposure and appropriate thermal development (480 C/3 h, 500 C/2 h) exhibits good photo-induced crystallization performance, high VIS-near IR transmittance (670 to 2600 nm) and moderate photo-induced refractive index change (1.1 &times; 10<sup>- 3</sup>), which at present status enables this new PTR glass basic ability to record holographic elements. &copy; 2013 Elsevier B.V.

Number of references:34

Main heading:Glass

Controlled terms:Absorption - Absorption spectroscopy - Boron - Crystallization - Forced convection - Glass manufacture - Phase separation - Silicates

Uncontrolled terms:Crystallization properties - Glass melting temperature - Liquid-liquid phase separation - Melt quenching techniques - Photo-induced crystallization - Spectroscopic absorption - Thermal development - UV exposure

Classification code:931.2 Physical Properties of Gases, Liquids and Solids - 812.3 Glass - 812 Ceramics, Refractories and Glass - 801 Chemistry - 933.1 Crystalline Solids - 741 Light, Optics and Optical Devices - 641.1 Thermodynamics - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 414 Masonry Materials - 641.2 Heat Transfer

DOI:10.1016/j.jnoncrysol.2013.03.002

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 124>

 

Accession number:20132916508844

Title:Model of radial artery based on human pulse

Authors:Wang, Xuemin (1); Yang, Cheng (1); Lu, Xiaozuo (2); Sun, Tao (3); Zhou, Peng (1)

Author affiliation:(1) School of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China; (2) School of Traditional Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin 300193, China; (3) School of Biomedical Engineering, The Fourth Military Medical University, Xi'an 710032, China

Corresponding author:Zhou, P.(zpzpa@vip.sina.com)

Source title:Tianjin Daxue Xuebao (Ziran Kexue yu Gongcheng Jishu Ban)/Journal of Tianjin University Science and Technology

Abbreviated source title:Tianjin Daxue Xuebao (Ziran Kexue yu Gongcheng Jishu Ban)

Volume:46

Issue:6

Issue date:June 2013

Publication year:2013

Pages:487-492

Language:Chinese

ISSN:04932137

CODEN:TCHHA9

Document type:Journal article (JA)

Publisher:Tianjin University, Tianjin, 300072, China

Abstract:For the purpose of clarifying the differences and similarities of different pulses, a radial artery circuit model was built based on the existing model of two elastic chambers and elastic tube by analyzing the pulse signal with engineering method. With the help of this model, a simulation was conducted, aiming at finding out what will happen to the output signal of Guan and Cun when there is a change in resistance and inductance between Chi and Cun has the same input signal. The experimental result shows that the change has more influence on Cun than on Guan, which indicates that the way the doctor changes his fingers when taking a diagnosis will has great effect on pulse wave, so he can get more information by adjusting his finger tips. The comparison of the pulse at Cun before and after the pressure change at Guan explains the reasonableness in the way of Chinese pulse diagnosis.

Number of references:15

Main heading:Computer simulation

Controlled terms:Tubes (components)

Uncontrolled terms:Circuit models - Elastic tubes - Engineering methods - Human pulse - Pressure change - Pulse diagnosis - Radial artery - Resistance and inductance

Classification code:616.1 Heat Exchange Equipment and Components - 723.5 Computer Applications

DOI:10.11784/tdxb20130603

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 125>

 

Accession number:20134416937961

Title:A FPGA-based digital-mirror driving control system for compressive imaging

Authors:Li, Shi Bo (1); He, Jun Hua (1); Lv, Pei (1)

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

Source title:Advanced Materials Research

Abbreviated source title:Adv. Mater. Res.

Volume:760-762

Monograph title:Optoelectronics Engineering and Information Technologies in Industry

Issue date:2013

Publication year:2013

Pages:1259-1262

Language:English

ISSN:10226680

ISBN-13:9783037857731

Document type:Conference article (CA)

Conference name:2nd International Conference on Opto-Electronics Engineering and Materials Research, OEMR 2013

Conference date:October 19, 2013 - October 20, 2013

Conference location:Zhengzhou, Henan, China

Conference code:100390

Sponsor:Computer Science and Electronic Technology; Trans tech publications inc.; National Cheng Kung University

Publisher:Trans Tech Publications Ltd, Kreuzstrasse 10, Zurich-Durnten, CH-8635, Switzerland

Abstract:With FPGA as the host controller, a set of hardware system based on digital micro-mirror device (DMD) for compressive imaging (CI) was developed. This paper studies the principle and characteristic of DMD control. First, the data of PC Screen image is transferred to DMD driver by software using binary pulse width modulation (BPWM) technology. The data is then rewritten into a control single which finally directs the DMD. The test results proved that the digital image received can be loaded onto the micro-mirrors excellently and with optics module installed, the system could successfully implement the CS measurement patterns which satisfy CI system. &copy; (2013) Trans Tech Publications, Switzerland.

Number of references:6

Main heading:Optical testing

Controlled terms:Electronics engineering - Field programmable gate arrays (FPGA) - Information technology - Mirrors

Uncontrolled terms:Compressive imaging - Digital micro-mirror device - DMD - Driving control - Hardware system - Host controller - Measurement patterns - USB2.0 transferring

Classification code:903 Information Science - 741.3 Optical Devices and Systems - 721.3 Computer Circuits - 718 Telephone Systems and Related Technologies; Line Communications - 717 Optical Communication - 716 Telecommunication; Radar, Radio and Television - 715 Electronic Equipment, General Purpose and Industrial - 714 Electronic Components and Tubes - 713 Electronic Circuits

DOI:10.4028/www.scientific.net/AMR.760-762.1259

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 126>

 

Accession number:20132016328399

Title:Spatiotemporal shaping of terahertz pulses using conductive apertures of finite thickness

Authors:Zou, Shengwu (1); Zhang, Tongyi (1)

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

Corresponding author:Zhang, T.(tyzhang@opt.ac.cn)

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

Abbreviated source title:Qiangjiguang Yu Lizishu

Volume:25

Issue:5

Issue date:May 2013

Publication year:2013

Pages:1325-1331

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:Terahertz (THz) pulses after spatiotemporal shaping have been widely applied to THz spectroscopy and imaging. We simulate the shaping effect of rectangular and circular apertures by employing the three-dimensional (3D) finite-difference-time-domain (FDTD) method. The simulation results show that we can realize effective shaping and filtering of THz pulses using rectangular and circular conductive apertures of finite thickness. When the long side of the rectangular aperture is perpendicular to the polarization direction of the incident wave, the rectangular aperture has a good influence on the shaping and filtering of THz pulses. However, when the long side of the rectangular aperture is parallel to the polarization direction of the incident wave, it almost has no obvious effect on the shaping and filtering of THz pulses. The circular aperture has more obvious effect on shaping of THz pulses than the rectangular aperture. Moreover, these simulation results can be interpreted qualitatively by the theory of planar waveguides.

Number of references:22

Main heading:Pulse shaping

Controlled terms:Finite difference time domain method - Polarization - Terahertz waves - Time domain analysis

Uncontrolled terms:Circular aperture - Finite thickness - Polarization direction - Rectangular aperture - Spatiotemporal shaping - Tera Hertz - Terahertz pulse - Thz spectroscopy

Classification code:711 Electromagnetic Waves - 711.1 Electromagnetic Waves in Different Media - 713.4 Pulse Circuits - 921 Mathematics

DOI:10.3788/HPLPB20132505.1325

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 127>

 

Accession number:20131716229854

Title:Two-dimensional sub-half-wavelength atom localization via phase control of absorption and gain

Authors:Wan, Ren-Gang (1); Zhang, Tong-Yi (1); Kou, Jun (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) Quantum Engineering Center, Beijing Institute of Control Device, Beijing 100854, China

Corresponding author:Wan, R.-G.(wrg@opt.ac.cn)

Source title:Physical Review A - Atomic, Molecular, and Optical Physics

Abbreviated source title:Phys Rev A

Volume:87

Issue:4

Issue date:April 15, 2013

Publication year:2013

Article number:043816

Language:English

ISSN:10502947

E-ISSN:10941622

CODEN:PLRAAN

Document type:Journal article (JA)

Publisher:American Physical Society, One Physics Ellipse, College Park, MD 20740-3844, United States

Abstract:We propose a scheme for two-dimensional atom localization based on the coherent controlled absorption and gain of a weak probe field in a four-level double-&Lambda; system, in which the atom interacts with two orthogonal standing-wave fields. Owing to the space-dependent atom-field interaction, the position probability distribution of the atom passing through the standing waves can be directly determined by measuring the resulting absorption and gain spectra. The phase-sensitive property of the atomic system significantly reduces the uncertainty in the position measurement of the atom. It is found that, by properly varying the parameters of the system, we can achieve sub-half-wavelength atom localization with high precision. Especially the probability of finding the atom at a particular position can be 100% when a photon with certain frequency is absorbed or amplified. Numerical calculations and qualitative analyses show that the enhancement of precision in the position measurement of the atom is attributed to the interference between the one-photon excitation and the phase-dependent three-photon excitation from the closed interacting contour in the laser-driven atomic system. &copy; 2013 American Physical Society.

Number of references:40

Main heading:Atom lasers

Controlled terms:Atoms - Laser excitation - Multiphoton processes - Photons - Position measurement - Probability distributions - Two dimensional

Uncontrolled terms:Atom localization - Atom-field interaction - Numerical calculation - One-photon excitation - Qualitative analysis - Standing-wave field - Three-photon excitation - Two-dimensional atoms

Classification code:744.1 Lasers, General - 744.9 Laser Applications - 902.1 Engineering Graphics - 922.1 Probability Theory - 931.3 Atomic and Molecular Physics - 943.2 Mechanical Variables Measurements

DOI:10.1103/PhysRevA.87.043816

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 128>

 

Accession number:20134416940654

Title:Survey on reconstruction algorithm based on compressive sensing

Authors:Li, Shen (1); Ma, Caiwen (1); Li, Yan (1); Chen, Ping (1)

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

Corresponding author:Li, S.(waterblue_333@opt.ac.cn)

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

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

Volume:42

Issue:SUPPL.1

Issue date:2013

Publication year:2013

Pages:225-232

Language:Chinese

ISSN:10072276

Document type:Journal article (JA)

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

Abstract:With the rapid demanding for information, the existing systems are very difficult to meet the challenges of high speed sampling, large volume data transmission and storage. Recently, a new sampling theory called compressive sensing (CS) provides a golden opportunity for solving this problem. CS theory asserts that a signal or image, unknown but supposed to be sparse or compressible in some basis, can be subjected to fewer measurements than traditional methods, and be accurately reconstructed. Firstly, a brief overview of the CS theory framework was given in this paper and the sampling process about signal compression was discussed. Next, the reconstruction algorithm of CS theory was reviewed. Especially, the basis pursuit algorithm and greedy algorithms were introduced and the difference between them was explored. In the end, possible implication in the areas of CS data reconstruction was briefly discussed. This paper provides theory basis for the improvement and application of compressed sensing reconstruction algorithm.

Number of references:60

Main heading:Algorithms

Controlled terms:Compressed sensing - Digital storage - Signal reconstruction

Uncontrolled terms:Compressive sensing - Data reconstruction - Greedy algorithms - High speed sampling - Information samplings - Reconstruction algorithms - Signal compression - Sparse

Classification code:716.1 Information Theory and Signal Processing - 722.1 Data Storage, Equipment and Techniques - 723 Computer Software, Data Handling and Applications - 921 Mathematics

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 129>

 

Accession number:20131416178299

Title:Modal characteristics analysis of a doubly clad optical fiber with semi-weakly guiding approximation

Authors:Tan, Xuefei (1); Liu, Xianglian (1); Zhao, Wei (1); Li, Cheng (1); Wang, Yishan (1); Li, Jianfeng (3)

Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an 710119, China; (2) University of the Chinese Academy of Science, Beijing 100049, China; (3) State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China (UESTC), Chengdu 610054, China

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

Source title:Optics Communications

Abbreviated source title:Opt Commun

Volume:294

Issue date:May 1, 2013

Publication year:2013

Pages:148-155

Language:English

ISSN:00304018

CODEN:OPCOB8

Document type:Journal article (JA)

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

Abstract:Modified characteristic equations for doubly clad multimode fibers were rigorously derived under semi-weakly guiding approximation in this article. The analytical expressions of the power flows distributed in the three regions of fiber cross section are also given. Different from previous works, results in this paper elucidate that, other than the inner cladding, the refractive indices also hold a non-ignorable influence on the modal power distribution and mode behaviors. By comparing the results of two models, this article demonstrates that the singly clad fiber model may not be suitable for analyses of common doubly clad fibers. &copy; 2012 Elsevier B.V.

Number of references:15

Main heading:Multimode fibers

Controlled terms:Fibers - Refractive index

Uncontrolled terms:Analytical expressions - Characteristic equation - Doubly clad optical fiber - Fiber cross section - Inner cladding - Modal characteristics - Modal power distributions - Power distributions

Classification code:741.1 Light/Optics - 741.1.2 Fiber Optics - 812 Ceramics, Refractories and Glass - 817 Plastics and Other Polymers: Products and Applications

DOI:10.1016/j.optcom.2012.11.080

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 130>

 

Accession number:20132216376032

Title:Precise alignment of separated Sagnac interferometer

Authors:Zhang, Xuemin (1); Wei, Ruyi (1); Yan, Su (1); Duan, Jiayou (1); Li, Hua (1); Yang, Jianfeng (1)

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

Corresponding author:Wei, R.(ruyiwei@opt.ac.cn)

Source title:Zhongguo Jiguang/Chinese Journal of Lasers

Abbreviated source title:Zhongguo Jiguang

Volume:40

Issue:4

Issue date:April 2013

Publication year:2013

Article number:0416001

Language:Chinese

ISSN:02587025

CODEN:ZHJIDO

Document type:Journal article (JA)

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

Abstract:A separated Sagnac interferometer with optical diameter of 60 mm and spectral channel of 65 is introduced based on its working principle. Ideal interference fringes and interference fringes are simulated when reflector has an angle deviation, and the effect of alignment error to the interference fringes is analyzed. The position accuracy and angle accuracy of alignment are induced based on the optical design parameters. The method of precision alignment is introduced in detail, which includes the installation of primary alignment plane, the precise location of splitting prism, the precise adjustment of long-arm and short-arm reflectors. Through the installation of alignment refrence and the masterly refrence transformation, the precise alignment of separated Sagnac interferometer is achieved based on the principle of auto-collimation, whose position accuracy is better than 0.01 mm, angle accuracy is better than 1&Prime;, super possition accuracy of primary working plane is better than 1&Prime;.

Number of references:15

Main heading:Separation

Controlled terms:Fiber optic sensors - Optical design - Reflection

Uncontrolled terms:Angle accuracies - Position accuracy - Precise alignments - Sagnac interferometer - Separated

Classification code:741.1 Light/Optics - 741.1.2 Fiber Optics - 802.3 Chemical Operations

DOI:10.3788/CJL201340.0416001

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 131>

 

Accession number:20132016329276

Title:A space audio cummunication system based on X-ray

Authors:Deng, Ning-Qin (1); Zhao, Bao-Sheng (1); Sheng, Li-Zhi (1); Yan, Qiu-Rong (1); Yang, Hao (1); Liu, Duo (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) University of Chinese Academy of Sciences, Beijing 100049, China

Corresponding author:Deng, N.-Q.(dengningqin@163.com)

Source title:Wuli Xuebao/Acta Physica Sinica

Abbreviated source title:Wuli Xuebao

Volume:62

Issue:6

Issue date:March 20, 2013

Publication year:2013

Article number:060705

Language:Chinese

ISSN:10003290

CODEN:WLHPAR

Document type:Journal article (JA)

Publisher:Institute of Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing, 100190, China

Abstract:In this paper, an X-ray communication program, which consists of a sender of grid controlled X-ray source and a receiver of X-ray single-photon detector based on micro-channel plate, is presented. With the detailed information about the signal modulation transmitter, the micro-channel-based X-ray single-photon detector as well as the signal receiving demodulator, a space audio communication system based on X-ray is built. The communication rate of more than 20 kbit/s is realized. According to the preliminary test result analyses of the X-ray space audio communication system test, the X-ray emission success rate restricts the communication speed by the influence of different X-ray intensities, signal shaping time and threshold settings respectively. Therefore, a scheme for further increasing X-ray communication performance is suggested. &copy; 2013 Chinese Physical Society.

Number of references:13

Main heading:X rays

Controlled terms:Communication systems - Detectors - Electron sources - Particle beams - Photodetectors - Photons - X ray apparatus

Uncontrolled terms:Communication performance - Communication rate - Communication speed - Micro channel plate - Signal modulations - Single-photon detectors - Threshold setting - X-ray sources

Classification code:716 Telecommunication; Radar, Radio and Television - 741.1 Light/Optics - 741.3 Optical Devices and Systems - 801 Chemistry - 914 Safety Engineering - 932.1 High Energy Physics

DOI:10.7498/aps.62.060705

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 132>

 

Accession number:20132916512171

Title:Graph-regularized low-rank representation for destriping of hyperspectral images

Authors:Lu, Xiaoqiang (1); Wang, Yulong (2); Yuan, Yuan (1)

Author affiliation:(1) Center for Optical Imagery Analysis and Learning, State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Xi'an 710119, China; (2) Faculty of Mathematics and Computer Science, Hubei University, Wuhan 430062, China

Source title:IEEE Transactions on Geoscience and Remote Sensing

Abbreviated source title:IEEE Trans Geosci Remote Sens

Volume:51

Issue:7

Issue date:2013

Publication year:2013

Pages:4009-4018

Article number:6418020

Language:English

ISSN:01962892

CODEN:IGRSD2

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:Hyperspectral image destriping is a challenging and promising theme in remote sensing. Striping noise is a ubiquitous phenomenon in hyperspectral imagery, which may severely degrade the visual quality. A variety of methods have been proposed to effectively alleviate the effects of the striping noise. However, most of them fail to take full advantage of the high spectral correlation between the observation subimages in distinct bands and consider the local manifold structure of the hyperspectral data space. In order to remedy this drawback, in this paper, a novel graph-regularized low-rank representation (LRR) destriping algorithm is proposed by incorporating the LRR technique. To obtain desired destriping performance, two sides of performing destriping are included: 1) To exploit the high spectral correlation between the observation subimages in distinct bands, the technique of LRR is first utilized for destriping, and 2) to preserve the intrinsic local structure of the original hyperspectral data, the graph regularizer is incorporated in the objective function. The experimental results and quantitative analysis demonstrate that the proposed method can both remove striping noise and achieve cleaner and higher contrast reconstructed results. &copy; 1980-2012 IEEE.

Number of references:41

Main heading:Spectroscopy

Controlled terms:Independent component analysis - Remote sensing

Uncontrolled terms:Destriping - Hyper-spectral images - Low-rank representations - Regularizer - Spectral correlation

Classification code:723.4 Artificial Intelligence - 731.1 Control Systems - 801 Chemistry

DOI:10.1109/TGRS.2012.2226730

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 133>

 

Accession number:20134817040197

Title:Design of new wide-angle unobscured three-mirror optical system

Authors:Pang, Zhihai (1); Fan, Xuewu (1); Zou, Gangyi (1); Zhao, Hui (1)

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

Corresponding author:Pang, Z.(uestc_pzh@126.com)

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

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

Volume:42

Issue:9

Issue date:September 2013

Publication year:2013

Pages:2449-2452

Language:Chinese

ISSN:10072276

Document type:Journal article (JA)

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

Abstract:For the disadvantage of conventional three mirrors system to achieve wide field of view, a new-style unobscured three -mirror optical system with wide field of view was designed based on the retrofocus -type objective configuration. One powerful retrofocus design approach was the combination with a reversed Galilean Telescope, the expression of initial configuration parameters was obtained and the unobscured style was carried out by decenter the field. A system with effective focal length of 100 mm, field of view of 20&deg; &times; 20&deg; and F-number of 5 was designed, the modulation transfer function value at spatial frequency of 50 lp/mm was over 0.6 and image qualities were excellent. Compared with traditional common three-mirror optical systems, the most prominent advantage of this new three-mirror system are that it can provide wide field of view and just use two aspheric mirrors and one spherical, so that the cost of this system will be reduced.

Number of references:10

Main heading:Optical systems

Controlled terms:Mirrors - Optical design

Uncontrolled terms:Effective focal lengths - Galilean telescopes - Initial configuration - Reflective systems - Spatial frequency - Three-mirror system - Wide field of view - Wide-angle

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

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 134>

 

Accession number:20134216859371

Title:Mean shift based gradient vector flow for image segmentation

Authors:Zhou, Huiyu (1); Li, Xuelong (2); Schaefer, Gerald (3); Celebi, M. Emre (4); Miller, Paul (1)

Author affiliation:(1) ECIT, Queen's University Belfast, Belfast BT3 9DT, United Kingdom; (2) Center for OPTical IMagery Analysis and Learning (OPTIMAL), State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xi'an 710119, Shaanxi, China; (3) Department of Computer Science, Loughborough University, Loughborough LE11 3TU, United Kingdom; (4) Department of Computer Science, Louisiana State University, Shreveport, LA 71115, United States

Corresponding author:Zhou, H.(h.zhou@ecit.qub.ac.uk)

Source title:Computer Vision and Image Understanding

Abbreviated source title:Comput Vision Image Understanding

Volume:117

Issue:9

Issue date:2013

Publication year:2013

Pages:1004-1016

Language:English

ISSN:10773142

E-ISSN:1090235X

CODEN:CVIUF4

Document type:Journal article (JA)

Publisher:Academic Press Inc., 1250 Sixth Avenue, San Diego, California, CA 92101, United States

Abstract:In recent years, gradient vector flow (GVF) based algorithms have been successfully used to segment a variety of 2-D and 3-D imagery. However, due to the compromise of internal and external energy forces within the resulting partial differential equations, these methods may lead to biased segmentation results. In this paper, we propose MSGVF, a mean shift based GVF segmentation algorithm that can successfully locate the correct borders. MSGVF is developed so that when the contour reaches equilibrium, the various forces resulting from the different energy terms are balanced. In addition, the smoothness constraint of image pixels is kept so that over- or under-segmentation can be reduced. Experimental results on publicly accessible datasets of dermoscopic and optic disc images demonstrate that the proposed method effectively detects the borders of the objects of interest. &copy; 2013 Elsevier Inc. All rights reserved.

Number of references:52

Main heading:Image segmentation

Controlled terms:Partial differential equations

Uncontrolled terms:Contour - Energy functions - Gradient vector flow - Mean shift - Publicly accessible - Segmentation algorithms - Segmentation results - Smoothness constraints

Classification code:741.1 Light/Optics - 921.2 Calculus

DOI:10.1016/j.cviu.2012.11.015

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 135>

 

Accession number:20131116108217

Title:Optical storage properties of different fulgides

Authors:Chao, Lumen (1); Menke, Neimule (1); Yao, Baoli (3); Lei, Ming (3); Wang, Yingli (3); Sun, Xiaoman (1); Chen, Yi (4)

Author affiliation:(1) School of Physical Science and Technology, Inner Mongolia University, Hohhot 010021, China; (2) Ordos College, Inner Mongolia University, Ordos, 017000, 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; (4) 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:Advanced Materials Research

Abbreviated source title:Adv. Mater. Res.

Volume:660

Monograph title:Future Optical Materials and Circuit Design

Issue date:2013

Publication year:2013

Pages:24-29

Language:English

ISSN:10226680

ISBN-13:9783037856413

Document type:Conference article (CA)

Conference name:2012 International Conference on Future Optical Materials and Circuit Design, FOMCD 2012

Conference date:December 27, 2012 - December 28, 2012

Conference location:Xiamen, China

Conference code:95897

Sponsor:Hongkong Education Society

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

Abstract:As one kind of organic photochromic optical storage material, fulgides are well-known for their thermally irreversibility. In this paper, two kinds of new fulgide materials, like pyrrylfulgide/PMMA film and 3-indoly-benzylfulgimide/PMMA film are used as storage materials. Different kinds of optical storage properties, like photosensitive spectral range, light sensitivity, resolution, fatigue resistance and thermal stability of them are measured. The experimental results show that for pyrrylfulgide and 3-indoly-benzylfulgimide, their photosensitive spectral range were 500nm~780nm and 480nm~720nm respectively; their maximum absorption were at 626nm and 573nm respectively; under 633nm light excitation, their light reaction constants of bleaching process on the exciting light polarization direction were 1.4&times;10<sup>-3</sup>cm<sup>2</sup>/mJ and 2.89&times;10<sup>-3</sup>cm<sup>2</sup>/mJ respectively; their resolution were both higher than 1680 lines/mm; they can be recycled more than 33 times and 70 times respectively; at room temperature they can be stored for 12 months and 14 months respectively. And it is concluded that pyrrylfulgide and 3-indoly-benzylfulgimide show better application potential in the field of rewriteable optical storage. &copy; 2013 Trans Tech Publications, Switzerland.

Number of references:10

Main heading:Photosensitivity

Controlled terms:Light sensitive materials - Photochromism

Uncontrolled terms:3-indoly-benzylfulgimide - Bleaching process - Fulgides - Light excitation - Optical Storage - Photochromic optical storage - Polarization direction - Pyrrylfulgide - Room temperature - Spectral range

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

DOI:10.4028/www.scientific.net/AMR.660.24

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 136>

 

Accession number:20132416413136

Title:Approach for differential phase contrast imaging in x-ray microscopy

Authors:Liu, Zhenwei (1); Lin, Danying (2); Huang, Jianheng (2); Niu, Hanben (1)

Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics of CAS, Chinese Academy of Sciences, Xi'an 710119, China; (2) Key Laboratory of Optoelectronics Devices, Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen 518060, China

Source title:Optics Letters

Abbreviated source title:Opt. Lett.

Volume:38

Issue:11

Issue date:June 1, 2013

Publication year:2013

Pages:1990-1992

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:We propose a differential phase contrast imaging method in x-ray microscopy by utilizing a biased derivative filter, which is structurally similar to that used in visible optics, except that phase changes by the filter cannot be ignored in the x-ray range. However, it is demonstrated that the filter's phase retardation does not disturb its function of phase contrast imaging, and even enhances the signals to some extent. Theoretical formulations and corresponding numerical simulations show that the approach is capable of performing characteristic differential microscopic phase imaging with nanometer-scale resolution. Manageable parameters are also examined in detail for pursuing a high image quality. &copy; 2013 Optical Society of America.

Number of references:7

Main heading:X rays

Controlled terms:X ray microscopes

Uncontrolled terms:Derivative filter - Differential phase contrast imaging - High image quality - Nanometer-scale resolution - Phase retardation - Phase-contrast imaging - Theoretical formulation - X ray microscopy

Classification code:741.3 Optical Devices and Systems - 932.1 High Energy Physics

DOI:10.1364/OL.38.001990

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 137>

 

Accession number:20134917058169

Title:Research on microsphere array laser in circulating state pumped by LDA

Authors:Ding, Jianyong (1); Gui, Luo (2); Zhao, Pengfei (3); Peng, Bo (3); Wei, Wei (1)

Author affiliation:(1) School of Optoelectronic Engineering, Nanjing University of Posts and Telecommunications, Nanjing, Jiangsu 210023, China; (2) Joint Laboratory on High Power Laser and Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China; (3) 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

Corresponding author:Ding, J.(ding.jianyong@163.com)

Source title:Zhongguo Jiguang/Chinese Journal of Lasers

Abbreviated source title:Zhongguo Jiguang

Volume:40

Issue:10

Issue date:October 2013

Publication year:2013

Article number:1002010

Language:Chinese

ISSN:02587025

CODEN:ZHJIDO

Document type:Journal article (JA)

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

Abstract:A novel laser gain medium, microsphere array cooled by refractive index-matched coolant, is presented in response to the thermal management of high-power solid-state lasers in this paper. Experiments on microsphere array lasers in circulating state are carried out. The emission spectra and flourescence decay curves are measured. Besides, the stable pulse output energy is achieved and its laser characteristics are studied. The maximum pulse energy of microsphere array laser with diameters of 2 mm and 4 mm are 30.2 mJ and 115.4 mJ, respectively at a repetition rate of 1 Hz, and the corresponding slope efficiencies are 4.6% and 16.2%, respectively. Output energy decreases as pumping frequency increases. Experimental results show that the microsphere array laser has relatively good thermal performance and thermal stability, and can be used in high-power laser systems.

Number of references:10

Main heading:Pumping (laser)

Controlled terms:Emission spectroscopy - Laser Doppler velocimeters - Lasers - Microspheres - Q switched lasers - Refractive index - Solid state lasers - Temperature control

Uncontrolled terms:Emission spectrums - High-power laser systems - High-power solid-state lasers - Laser characteristics - Laser diode pumping - Microsphere arrays - Slope efficiencies - Thermal Performance

Classification code:731.3 Specific Variables Control - 741.1 Light/Optics - 744 Lasers - 818 Rubber and Elastomers

DOI:10.3788/CJL201340.1002010

Database:Compendex

Compilation and indexing terms, Copyright 2014 Elsevier Inc.

 

<RECORD 138>

 

Accession number:20124515637915

Title:A photocatalytic reactor derived from microstructured polymer optical fiber preform

Authors:Li, Dongdong (1); Wang, Lili (2); Zhang, Gongjian (3)

Author affiliation:(1) Department of Electronic and Telecommunications Engineering, Xi'An University of Post and Telecommunications, Xi'an, 710121, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Information road 17, Xi'an, Shaanxi, 710119, China; (3) Chitose Institute of Science and Technology, Bibi 758-65, Chitose, Hokkaido, 0668655, Japan

Corresponding author:Li, D.(dongdong19821111@163.com)