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<RECORD 1>
 
Accession number:20231413853673
Title:Multifunctional all-fiber polarization-maintaining nonlinear pulse amplifier
Authors:Nie, Liang (1); Shi, Zhaojiang (2); Chen, Zeyou (3); Wang, Wei (1); Gao, Ge (1); Xu, Yusheng (1); Li, Xiaohui (1, 2); Fan, Wenhui (3) 
Author affiliation:(1) School of Optoelectronic Engineering, Xi'an Technological University, Xi'an; 710021, China; (2) School of Physics & Information Technology, Shaanxi Normal University, Xian, 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 authors:Nie, Liang(nieliang@xatu.edu.cn); Li, Xiaohui(lixiaohui0523@163.com)
Source title:Optik
Abbreviated source title:Optik
Volume:281
Issue date:June 2023
Publication year:2023
Article number:170796
Language:English
ISSN:00304026
Document type:Journal article (JA)
Publisher:Elsevier GmbH
Abstract:<div data-language="eng" data-ev-field="abstract">A multifunctional all-fiber polarization-maintaining nonlinear amplifier system is proposed and investigated. Two Erbium-doped polarization-preserving gain fibers are used to amplify the seed laser and split into four output points with different transmission fibers to obtain four stable ultra-short pulses with different durations, which vary from tens of fs to ps level. And the output powers are tens of mW and can be changed with different output point. The seed laser in this process has a repetition rate of 113 MHz, a pulse duration of about 450fs, and different absorption coefficients for the two gain fibers. It is demonstrated that the proposed fiber laser with varied pulse duration can be potentially applied in laser detection, terahertz generation, and even different types of material processing.<br/></div> &copy; 2023
Number of references:34
Main heading:Pulse amplifiers
Controlled terms:Fiber amplifiers - Fiber lasers - Laser materials processing - Polarization - Polarization-maintaining fiber - Pulse repetition rate - Ultrashort pulses
Uncontrolled terms:All fiber - All-fiber lasers - Amplifier systems - Erbium doped - Gain fibers - Mode-locked oscillators - Nonlinear amplifier - Pulse durations - Seed lasers - Ultrashort-pulse
Classification code:713.1  Amplifiers - 713.4  Pulse Circuits - 741.1.2  Fiber Optics - 744.1  Lasers, General - 744.4  Solid State Lasers - 744.9  Laser Applications
Numerical data indexing:Frequency 1.13E+08Hz, Time 4.50E-13s
DOI:10.1016/j.ijleo.2023.170796
Funding details:  Number: 20JY029, Acronym: -, Sponsor: -;Number: 1112010209,1110010717,2023-GHYB-03,2023-GHZD-46,2023-GHZD-52, Acronym: -, Sponsor: -;Number: L2022-ZDYF-GY-028, Acronym: -, Sponsor: -;Number: -, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 18QNGG006, Acronym: -, Sponsor: Shaanxi Normal University;
Funding text:This research was supported by the Funded projects for the Academic Leader and Academic Backbones, Shaanxi Normal University ( 18QNGG006 ); Shaanxi International Cooperation Project ( 2023-GHYB-03; 2023-GHZD-46; 2023-GHZD-52 ); Starting Grants of Shaanxi Normal University ( 1112010209,1110010717 ); Key Scientific Research Plan of Education Department of Shaanxi (No. 20JY029 ); Xianyang City Key R&D Plan ( L2022-ZDYF-GY-028 ), and CAS "Light of West China" program.
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 2>
 
Accession number:20231213778010
Title:Radiation force of a special correlated beam with off-axis multiple vortices on Rayleigh particles
Authors:Zhou, Zheng-lan (1); Zhang, Shao-hua (1); Zhou, Yuan (2); Han, Ya-shuai (1); Zhou, Zheng-xian (1); Yao, Bao-li (2); Qu, Jun (1) 
Author affiliation:(1) Anhui Province Key Laboratory of Optoelectric Materials Science and Technology, Anhui normal university, Wuhu; 241000, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shanxi, Xi'an; 710119, China 
Corresponding author:Qu, Jun(qujun70@ahnu.edu.cn)
Source title:Journal of Quantitative Spectroscopy and Radiative Transfer
Abbreviated source title:J. Quant. Spectrosc. Radiat. Transf.
Volume:302
Issue date:July 2023
Publication year:2023
Article number:108580
Language:English
ISSN:00224073
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">In order to explore the potential application of a superimposed Hermite-Gaussian correlated Schell-model beams with off-axis multi-vortices in optical trapping, based on the generalized Collins formula, the focused beam intensity and radiation force on particles are derived in detail. Numerical results show that the gradient force and capture stability range increase with the increase of topological charge. By changing the vortex off-axis distance, the precise position control of the particles can be made. Adjusting the number of vortices can control the existence of vortex singularity on the side lobe of the beam, and generate or close the optical potential well or optical cage in real time. By selecting the appropriate beam order, two kinds of particles with different refractive indexes can be captured. The beams are expected to be applied to optical trapping of multiple particles at different positions.<br/></div> &copy; 2023
Number of references:37
Main heading:Vortex flow
Controlled terms:Gaussian beams - Position control - Refractive index
Uncontrolled terms:Collins formula - Generalized collin formula - Hermite - Laser technologies - Multi-vortex beam - Off-axis - Optical trappings - Radiation forces - Rayleigh particle - Vortex beams
Classification code:631.1  Fluid Flow, General - 711  Electromagnetic Waves - 731.3  Specific Variables Control - 741.1  Light/Optics
DOI:10.1016/j.jqsrt.2023.108580
Funding details:  Number: 12074005, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 11974219,SKLST202103, Acronym: SKLTOP, Sponsor: State Key Laboratory of Transient Optics and Photonics;
Funding text:National Natural Science Foundation of China ( 12074005 ); State Key Laboratory of Transient Optics and Photonics ( SKLST202103 ); National Natural Science Foundation of China ( 11974219 ).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 3>
 
Accession number:20223712727226
Title:Large dispersion-managed broadband high-energy fiber femtosecond laser system with sub 300 fs pulses and high beam quality output
Authors:Li, Feng (1); Zhao, Wei (1); Wang, Yishan (1); Li, Dongjuan (1); Song, Dongdong (1); Li, Qianglong (1); Yang, Yang (1); Wen, Wenlong (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:Li, Feng(lifeng@opt.ac.cn)
Source title:Optics and Laser Technology
Abbreviated source title:Opt Laser Technol
Volume:157
Issue date:January 2023
Publication year:2023
Article number:108653
Language:English
ISSN:00303992
CODEN:OLTCAS
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">We experimentally demonstrate a high-energy sub 300 fs polarization maintaining fiber chirped pulse amplification (CPA) system. The preamplifier is a monolithic fiberized system that uses two cascaded temperature-assisted dispersion-tuning broadband chirped fiber Bragg gratings (CFBGs) with a reflected bandwidth of 20 nm as stretchers. To make full use of the stretcher to lower the system's nonlinearity accumulation, a homemade mode locked fiber laser with a spectral width of 14.8 nm (full width at half maximum) is selected as the seeder to offer a stretched pulse width of 1.69 ns. The main amplifier is based on a one-stage simple Yb:YAG single crystal fiber amplifier with an amplified output power of 40.6 W at a repetition rate of 200 kHz, and the beam quality is conserved in a single mode beam profile with beam quality of 1.246 and 1.142 in the horizontal direction and vertical direction, respectively. During amplification, the spectral gain narrowing effect is observed. To achieve the high-speed switch of the laser, an acoustical optical modulator (AOM) is inserted before the compressor to achieve high-speed turn-on/off control. The compressor is based on a diffraction grating pair with a groove density of 1600 line/mm to offer a dispersion match with the stretcher of the CFBGs. With the CFBG's fine-tuned capacity of second-order dispersion and higher-order dispersion, the compressed average power of 29.6 W and pulse duration of 278 fs, corresponding to a pulse energy of 148 &micro;J and a peak power of 532 MW with ignoring the wings of the pulse, is obtained. The beam quality is well conserved after compression, and the beam quality is 1.250 and 1.196 in the horizontal direction and vertical direction, respectively. A power fluctuation of 0.1% (root mean square) and a beam pointing drift of 8.47 &micro;rad/&deg;C over 8 h are realized. This high peak power and high beam quality femtosecond laser is promising in science and industrial applications.<br/></div> &copy; 2022
Number of references:32
Main heading:Light modulators
Controlled terms:Chirp modulation - Fiber amplifiers - Fiber Bragg gratings - Fiber lasers - Silicates - Ultrashort pulses
Uncontrolled terms:Beams quality - Broadband femto-second lasers - Broadband femtosecond laser amplification - Chirped fibre Bragg gratings - Energy - High beam quality - Laser amplification - Silicate glass fibers - Single crystal fiber - Vertical direction
Classification code:716  Telecommunication; Radar, Radio and Television - 744.4  Solid State Lasers
Numerical data indexing:Frequency 2.00E+05Hz, Percentage 1.00E-01%, Power 2.96E+01W, Power 4.06E+01W, Power 5.32E+08W, Size 1.48E-08m, Size 2.00E-08m, Size 2.90068E-02m, Size 3.03784E-02m, Size 3.16484E-02m, Size 3.175E-02m, Time 1.69E-09s, Time 2.78E-13s, Time 2.88E+04s, Time 3.00E-13s
DOI:10.1016/j.optlastec.2022.108653
Funding details:  Number: XAB2021YN12, Acronym: -, Sponsor: -;Number: 2022KJXX-98, Acronym: -, Sponsor: -;Number: 61690222, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: XIOPMQCH2021007, Acronym: YIPA CAS, Sponsor: Youth Innovation Promotion Association of the Chinese Academy of Sciences;Number: -, Acronym: -, Sponsor: CAS-SAFEA International Partnership Program for Creative Research Teams;
Funding text:This work was supported by Shaanxi young science and technology star(No. 2022KJXX-98); Chinese academy of science "light of west China" program (Grant No. XAB2021YN12); key project of "double chain" integration of Shaanxi province; the National Natural Science Foundation of China, (No.61690222);The Youth Innovation Promotion Association XIOPM-CAS (No. XIOPMQCH2021007); The CAS/SAFEA International Partnership Program for Creative Research Teams;
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 4>
 
Accession number:20231613889034
Title:Sideband suppression of conventional soliton in Figure-9 passively Mode-locked fiber laser
Authors:Liang, Lei (1); YijieWang (1); Hu, Qianyu (1); Ren, Kaili (1, 2); Zheng, Yipeng (1); Zhu, Lipeng (1); Li, Lu (1); Han, Dongdong (1) 
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:Han, Dongdong(handongdong@xupt.edu.cn)
Source title:Infrared Physics and Technology
Abbreviated source title:Infrared Phys Technol
Volume:131
Issue date:June 2023
Publication year:2023
Article number:104688
Language:English
ISSN:13504495
CODEN:IPTEEY
Document type:Journal article (JA)
Publisher:Elsevier B.V.
Abstract:<div data-language="eng" data-ev-field="abstract">In this paper, the sideband suppression of a conventional soliton pulse is studied experimentally and theoretically based on a figure-9 passively mode-locked fiber laser. The sidebands of a conventional soliton could be suppressed by adjusting the polarization controller without reducing the output power of the soliton pulse. Three typical spectral forms with different degrees of sidebands suppression are experimentally obtained and the mechanism is analyzed theoretically. Based on the round-trip model, a theoretical model of a figure-9 passively mode-locked fiber laser is established. By changing the phase difference induced by polarization controller in the laser cavity, the experimental results could be confirmed. The above results have important reference value for improving the conventional soliton spectral output and eliminating the conventional soliton sidebands.<br/></div> &copy; 2023 Elsevier B.V.
Number of references:39
Main heading:Solitons
Controlled terms:Fiber lasers - Fibers - Mode-locked fiber lasers - Passive mode locking - Polarization
Uncontrolled terms:Conventional soliton - Figure-9 cavity - Output power - Passively mode-locked fiber lasers - Polarization controllers - Round trip - Sideband - Sideband suppression - Soliton pulse - Theoretical modeling
Classification code:744.1  Lasers, General - 744.4  Solid State Lasers
DOI:10.1016/j.infrared.2023.104688
Funding details:  Number: 2022KJXX-69, Acronym: -, Sponsor: -;Number: SKLST202107, Acronym: -, Sponsor: -;Number: 12104368,61805198, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2021JQ-720,2022JM-357, Acronym: -, Sponsor: Natural Science Basic Research Program of Shaanxi Province;
Funding text:This work was supported by the National Natural Science foundation of China (Nos. 61805198, 12104368 ), Natural Science Basic Research Plan of Shaanxi Province of China (Nos. 2021JQ-720, 2022JM-357), New Star Project of Science and Technology of Shaanxi Province (No. 2022KJXX-69), Open Foundation of State Key Laboratory of Transient Optics and Photonics (SKLST202107).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 5>
 
Accession number:20231814028077
Title:Phase regeneration of star-16QAM using phase-sensitive amplification in graphene silicon-based organic hybrid waveguide
Authors:Ren, Li (1); Li, Xuefeng (2); Wu, Xiao (1); Liu, Hongjun (3) 
Author affiliation:(1) School of Electronic Engineering, Xi'an University of Posts & Telecommunications, Xi'an; 710121, China; (2) School of Science, Xi'an University of Posts & Telecommunications, Xi'an; 710121, 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:Li, Xuefeng(lixfpost@163.com)
Source title:Optics Communications
Abbreviated source title:Opt Commun
Volume:540
Issue date:August 1, 2023
Publication year:2023
Article number:129530
Language:English
ISSN:00304018
CODEN:OPCOB8
Document type:Journal article (JA)
Publisher:Elsevier B.V.
Abstract:<div data-language="eng" data-ev-field="abstract">We theoretically demonstrate the phase regeneration of the star-16-quadrature-amplitude-modulation(star-16QAM) signal in a graphene-graphene oxide hybrid waveguide. The multi-order dispersion properties of this waveguide are tuned by graphene, where the near-zero-dispersion-point moves to right with increasing applied electrochemistry. The waveguide nonlinearity coefficient is 1.534&times;10<sup>6</sup>/m/W and the dispersion is flat in the ultra-wide wavelength range of 1310 nm to 1860 nm by filling the waveguide with the high kerr coefficient organic material graphene oxide. The phase regeneration of the star-16QAM signal is achieved by using a dual-conjugate-pump degenerate four-wave mixing (FWM) technique, and the results show that the error-vector -magnitude (EVM) is reduced from 39.25% to 2.14%, the phase noise is effectively compressed.<br/></div> &copy; 2023 Elsevier B.V.
Number of references:31
Main heading:Waveguides
Controlled terms:Dispersion (waves) - Four wave mixing - Graphene - Quadrature amplitude modulation - Silicon - Stars
Uncontrolled terms:Graphene oxides - Hybrid waveguides - Organic hybrids - Phase regeneration - Phase sensitive amplifiers - Phase-sensitive amplifications - Quadrature amplitude modulation signals - Silicon-based - Star 16-quadrature amplitude modulations - Star-16QAM
Classification code:549.3  Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 657.2  Extraterrestrial Physics and Stellar Phenomena - 714.3  Waveguides - 761  Nanotechnology - 804  Chemical Products Generally
Numerical data indexing:Percentage 3.925E+01% to 2.14E+00%, Size 1.31E-06m to 1.86E-06m
DOI:10.1016/j.optcom.2023.129530
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 6>
 
Accession number:20230513475061
Title:Complete and robust energy conversion by sum frequency generation based on invariant engineering    (Open Access)
Authors:Zhang, Cong-Fu (1, 2); Wang, Zhao-Lu (1); Liu, Hong-Jun (1, 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 Chinese Academy of Sciences, Beijing; 100084, China; (3) Collabotative Innovation Center of Extreme Optics, Shanxi University, Taiyuan; 030006, China 
Corresponding author:Liu, Hong-Jun(liuhongjun@opt.ac.cn)
Source title:Optics Express
Abbreviated source title:Opt. Express
Volume:31
Issue:3
Issue date:January 30, 2023
Publication year:2023
Pages:3536-3548
Language:English
E-ISSN:10944087
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">An analytical method is proposed in this paper to achieve complete energy conversion in sum frequency generation based on the Lewis-Riesenfeld invariants theory. In the proposed scheme, a quasi-adiabatic single control parameter model is established, and the value of single control parameter is selected to make the initial eigenstate perfectly converted to the final eigenstate as needed. Corresponding to the nonlinear frequency conversion process, a nonlinear crystal structure is designed by inverse engineering using the optimal control theory. It is robust against perturbations of the coupling coefficient and phase mismatch, including variations in the pump intensity and crystal polarization period, and achieves almost 100% conversion efficiency at any crystal length. Theoretical simulations show that frequency conversion can be achieved in the wavelength range of 2.6 &mu;m-3.6 &mu;m, and the spectral bandwidth of conversion efficiency exceeds 50% and approaches 400 nm when the crystal length L = 1 mm.<br/></div> &copy; 2023 Optica Publishing Group.
Number of references:35
Main heading:Conversion efficiency
Controlled terms:Crystal structure - Crystals - Interferometry
Uncontrolled terms:Analytical method - Control parameters - Crystal length - Eigenstates - Frequency-conversion process - Invariant theory - Nonlinear frequency conversion - Parameter model - Robust energy - Sum frequency generation
Classification code:525.5  Energy Conversion Issues - 933.1  Crystalline Solids - 933.1.1  Crystal Lattice - 941.4  Optical Variables Measurements
Numerical data indexing:Percentage 1.00E+02%, Percentage 5.00E+01%, Size 1.00E-03m, Size 2.60E-06m to 3.60E-06m, Size 4.00E-07m
DOI:10.1364/OE.477959
Funding details:  Number: 61775234,61975232, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:National Natural Science Foundation of China (61975232, 61775234).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold, Green
 
<RECORD 7>
 
Accession number:20231413846930
Title:Realizing particle population inversion of 2.7 &mu;m emission in heavy Er<sup>3+</sup>/Pr<sup>3+</sup> co-doped low hydroxyl fluorotellurite glass for mid-infrared laser
Authors:Feng, Shaohua (1, 2); Liu, Chengzhen (1, 2); Zhu, Jun (1, 2); Xu, Yantao (1, 2); Xiao, Xusheng (1, 2); Guo, Haitao (1, 2, 3) 
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences (CAS), Shaanxi, Xi'an; 710119, China; (2) Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Collaborative Innovation Center of Extreme Optics, Shanxi University, Shanxi, Taiyuan; 030006, China 
Corresponding authors:Liu, Chengzhen(liuchengzhen@opt.ac.cn); Guo, Haitao(guoht_001@opt.ac.cn)
Source title:Ceramics International
Abbreviated source title:Ceram Int
Volume:49
Issue:12
Issue date:June 15, 2023
Publication year:2023
Pages:20372-20380
Language:English
ISSN:02728842
CODEN:CINNDH
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">In this work, the population bottleneck of Er<sup>3+</sup>: <sup>4</sup>I<inf>11/2</inf> &rarr; <sup>4</sup>I<inf>13/2</inf> was overcome for the first time in heavy Er<sup>3+</sup>/Pr<sup>3+</sup> co-doped TeO<inf>2</inf>&ndash;BaF<inf>2</inf>&ndash;La<inf>2</inf>O<inf>3</inf>&ndash;LaF<inf>3</inf> (TBLL) low hydroxyl fluorotellurite glasses. Infrared emission spectra and fluorescence lifetime decay curves reveal that Pr<sup>3+</sup> ions could deplete the electrons from the Er<sup>3+</sup>: <sup>4</sup>I<inf>13/2</inf> level faster than those from the Er<sup>3+</sup>: <sup>4</sup>I<inf>11/2</inf> under 980 nm excitation. Specifically, the energy transfer (ET) efficiency of the Er<sup>3+</sup>: <sup>4</sup>I<inf>13/2</inf> &rarr; Pr<sup>3+</sup>: <sup>3</sup>F<inf>3,4</inf> process (ET1) reached 96.27%, while that of the Er<sup>3+</sup>: <sup>4</sup>I<inf>11/2</inf> &rarr; Pr<sup>3+</sup>: <sup>1</sup>G<inf>4</inf> process (ET2) is only 2.17% in the Er<sup>3+</sup>/Pr<sup>3+</sup> co-doped glass. Additionally, the energy transfer mechanism of Er<sup>3+</sup> and Pr<sup>3+</sup> ions was investigated using the Dexter theory, where the energy transfer microscopic parameters C<inf>D-A</inf> are 13.21 &times; 10<sup>&minus;40</sup> cm<sup>6</sup>/s and 0.89 &times; 10<sup>&minus;40</sup> cm<sup>6</sup>/s for the ET1 and ET2 processes, respectively. Finally, a numerical simulations laser model was developed to discuss the laser properties of the Er<sup>3+</sup>/Pr<sup>3+</sup> co-doped TBLL fibers. The simulation results indicate that a 2.7 &mu;m laser with a maximum output power of 2.26 W and slope efficiency of 13.89% could be achieved when the fiber background loss is reduced to 0.5 dB/m. The above results suggest that the Er<sup>3+</sup>/Pr<sup>3+</sup> co-doped TBLL glass has great potential applications in mid-infrared fiber lasers.<br/></div> &copy; 2023 Elsevier Ltd and Techna Group S.r.l.
Number of references:35
Main heading:Energy transfer
Controlled terms:Barium compounds - Emission spectroscopy - Fiber lasers - Glass - Infrared devices - Optical parametric oscillators - Tellurium compounds
Uncontrolled terms:Co-doped - Energy-transfer - Fluoro-tellurite glass - Infrared-laser - Laser output - Low hydroxyl absorption - Midinfrared - Particle population - Population inversions - Tellurite glass
Classification code:744.4  Solid State Lasers - 812.3  Glass
Numerical data indexing:Capacitance 3.00E+00F, Decibel 5.00E-01dB, Percentage 1.389E+01%, Percentage 2.17E+00%, Percentage 9.627E+01%, Power 2.26E+00W, Size 1.321E-41m, Size 2.70E-06m, Size 8.90E-43m, Size 9.80E-07m
DOI:10.1016/j.ceramint.2023.03.165
Funding details:  Number: 61935006,62005312,62090065, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: J22-068-III, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 2023-JC-JQ-31, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;
Funding text:This work was financially supported by the National Natural Science Foundation of China (Grants Nos. 62090065 , 61935006 , and 62005312 ), the Natural Science Foundation of Shaanxi Province ( 2023-JC-JQ-31 ), and the Special Research Assistant Program of CAS ( J22-068-III ).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 8>
 
Accession number:20231513877424
Title:Spectral beam combining of fiber lasers with 32 channels    (Open Access)
Authors:Gao, Qi (1, 2); Li, Zhe (1, 2); Zhao, Wei (1); Li, Gang (1, 2); Ju, Pei (1, 2); Gao, Wei (1, 2); Dang, Wenjia (3) 
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) School of Science, Xi'an Aeronautical University, Xi'an; 710077, China 
Corresponding author:Zhao, Wei(weiz@opt.ac.cn)
Source title:Optical Fiber Technology
Abbreviated source title:Opt. Fiber Technol.
Volume:78
Issue date:July 2023
Publication year:2023
Article number:103311
Language:English
ISSN:10685200
CODEN:OFTEFV
Document type:Journal article (JA)
Publisher:Academic Press Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">We present a method for the spectral combination of fiber lasers with high spectral density, increasing spectral density utilization with no degradation in beam quality, and decreasing single channel narrow linewidth output power. Experiments demonstrating the utility of our method are described. The results show that we achieved 32-channel fiber laser spectral beam combining (SBC) with a beam quality of M<sup>2</sup> = 1.68. The SBC beam quality can be constantly optimized by integrally varying the spectral interval with the feedback system. Our method offers a point of reference to broadening to additional channels and enhancing the output power of the SBC with an excellent beam quality.<br/></div> &copy; 2023 The Authors
Number of references:26
Main heading:Fiber lasers
Controlled terms:Fibers - Spectral density
Uncontrolled terms:Beams quality - Feedback systems - Narrow-line width - Output power - Single channels - Spectral beam combing - Spectral beam combining - Spectral beams - Spectral combination - Superfluorescent source
Classification code:744.4  Solid State Lasers
DOI:10.1016/j.yofte.2023.103311
Funding details:  Number: 12204531, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2021GY-298,2021ZDLGY10-03,2022GY-225, Acronym: -, Sponsor: Key Research and Development Projects of Shaanxi Province;Number: 2021JQ-859, Acronym: -, Sponsor: Natural Science Basic Research Program of Shaanxi Province;
Funding text:This study is funded by the National Natural Science Foundation of China (NSFC) (12204531), Key Research and Development Program Fund of Shaanxi (2021GY-298, 2021ZDLGY10-03, and 2022GY-225), and Natural Science Basic Research Program of Shaanxi (2021JQ-859).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Hybrid Gold
 
<RECORD 9>
 
Accession number:20230613555366
Title:10-W random fiber laser based on Er/Yb co-doped fiber    (Open Access)
Authors:Li, Zhe (1, 2); Gao, Qi (1, 2); Li, Gang (1, 2); She, Shengfei (1, 2); Sun, Chuandong (1); Ju, Pei (1, 2); Gao, Wei (1, 2); Dang, Wenjia (3) 
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) School of Science, Xi'an Aeronautical University, Xi'an; 710077, China 
Source title:Optical Fiber Technology
Abbreviated source title:Opt. Fiber Technol.
Volume:77
Issue date:May 2023
Publication year:2023
Article number:103251
Language:English
ISSN:10685200
CODEN:OFTEFV
Document type:Journal article (JA)
Publisher:Academic Press Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">In this study, we presented a 1550-nm, high-power, high-efficiency random fiber laser to improve the output power and slope efficiency of erbium-ytterbium co-doped fiber&ndash;based random fiber lasers. By optimizing the length of the erbium-ytterbium co-doped fiber and increasing the 3-dB reflection bandwidth of fiber Bragg grating, the output power and slope efficiency of the random fiber laser were improved. Furthermore, the influence of different fiber lengths on the generation threshold of the amplified spontaneous emission from the Yb<sup>3+</sup>-ions was studied. An output power of more than 10 W was achieved, with a slope efficiency of 36.7 % and a single transverse mode output. The proposed random fiber laser showed excellent stability in the millisecond scale and long timescale (10 min). The findings of this study can provide a basis for the development of high-performance light sources for a variety of applications.<br/></div> &copy; 2023 The Authors
Number of references:23
Main heading:Fiber lasers
Controlled terms:Efficiency - Erbium - Fiber Bragg gratings - Ytterbium
Uncontrolled terms:1550 nm - 1550 nm wavelength fiber laser - Er/Yb co-doped fiber - Erbium-ytterbium co-doped fibers - Laser-based - Output power - Power-efficiency - Random fiber laser - Random fibers - Slope efficiencies
Classification code:547.2  Rare Earth Metals - 744.4  Solid State Lasers - 913.1  Production Engineering
Numerical data indexing:Decibel 3.00E+00dB, Percentage 3.67E+01%, Power 1.00E+01W, Size 1.55E-06m, Time 6.00E+02s
DOI:10.1016/j.yofte.2023.103251
Funding details:  Number: 12204531,62005310,62105358, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2021GY-298,2021ZDLGY10-03, Acronym: -, Sponsor: Key Research and Development Projects of Shaanxi Province;Number: 2021JQ-859,2022JQ-587, Acronym: -, Sponsor: Natural Science Basic Research Program of Shaanxi Province;
Funding text:National Natural Science Foundation of China (NSFC) ( 12204531 , 62105358 , 62005310 ); Key Research and Development Program Fund of Shaanxi (2021GY-298, 2021ZDLGY10-03); Natural Science Basic Research Program of Shaanxi (2021JQ-859, 2022JQ-587).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Hybrid Gold
 
<RECORD 10>
 
Accession number:20230413448214
Title:The Multiple Scattering of Laser Beam Propagation in Advection Fog and Radiation Fog    (Open Access)
Authors:Xu, Qiang (1); Cao, Yunhua (1); Zhang, Yuanyuan (1); Yan, Shaohui (2); Han, Yiping (1); Wu, Zhensen (1) 
Author affiliation:(1) School of Physics and Optoelectronic Engineering, Xidian University, Xi'an; 710071, China; (2) The 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:Wu, Zhensen(wuzhs@mail.xidian.edu.cn)
Source title:International Journal of Optics
Abbreviated source title:Int. J. Opt.
Volume:2023
Issue date:2023
Publication year:2023
Article number:9715482
Language:English
ISSN:16879384
E-ISSN:16879392
Document type:Journal article (JA)
Publisher:Hindawi Limited
Abstract:<div data-language="eng" data-ev-field="abstract">The laser beams were scattered and attenuated when they propagate in fogs for laser communication, laser remote sensing detection. For different density and droplets distribution of fogs, the laser scatter and attenuation are different, the correspond mechanism need thorough investigation. The characteristics of laser beam scattering in different types of fogs are studied based on the droplet size characteristics of advection fog and radiation fog, the scattering coefficients of droplets with different laser wavelengths(0.86 &mu;m, 0.91 &mu;m, 1.06 &mu;m, 1.3015, and 10.6 &mu;m) are calculated, the multi scattering of laser beam is studied by the Monte Carlo method, the propagation path and scattering direction of photons is analyzed, relations between asymmetry factor, albedo of fog droplets, and the visibility are presented, and the forward scattering intensity and the backward scattering intensity versus scattering angle are gotten and discussed.<br/></div> &copy; 2023 Qiang Xu et al.
Number of references:23
Main heading:Laser beams
Controlled terms:Advection - Drops - Fog - Forward scattering - Light propagation - Monte Carlo methods - Remote sensing
Uncontrolled terms:Advection fog - Communication lasers - Density distributions - Different densities - Droplet distribution - Laser beam propagation - Laser remote sensing - Multiple-scattering - Radiation fog - Scattering intensity
Classification code:443.1  Atmospheric Properties - 711  Electromagnetic Waves - 741.1  Light/Optics - 744.8  Laser Beam Interactions - 922.2  Mathematical Statistics
Numerical data indexing:Size 1.06E-05m, Size 1.06E-06m, Size 8.60E-07m, Size 9.10E-07m
DOI:10.1155/2023/9715482
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
 
<RECORD 11>
 
Accession number:20231113704388
Title:Sensitive label-free hemoglobin detection based on polydopamine functionalized graphene oxide coated micro-tapered long-period fiber grating
Authors:Li, Yansong (1); Du, Mengyu (1); He, Shuxuan (1); Wang, Ruiduo (2); Zhang, Zaikun (2); Wang, Qiang (1) 
Author affiliation:(1) Department of Anesthesiology & Center for Brain Science, The First Affiliated Hospital of Xi'an Jiaotong University, Shaanxi Province, Xi'an; 710061, 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:Wang, Ruiduo(wangruiduo@opt.ac.cn)
Source title:Optik
Abbreviated source title:Optik
Volume:275
Issue date:March 2023
Publication year:2023
Article number:170626
Language:English
ISSN:00304026
Document type:Journal article (JA)
Publisher:Elsevier GmbH
Abstract:<div data-language="eng" data-ev-field="abstract">The GO and PDA-GO functionalized TLPG based sensitive and label-free optical biosensor for human hemoglobin detection was demonstrated. The PDA-GO and GO were separately deposited onto fiber surface, the deposited materials provide a large number of binding sites to adsorb the hemoglobin and can further change the RI of fiber surface, and can provide more binding sites owing to the large specific surface area, and it exhibits higher sensing sensitivity of 3.14 mg/mL and the LOD can reach 0.057 mg/mL. In addition, the sensing was carried out in the presence of inference compounds and also proved its ideal reusability. The usage of PDA-GO as a bio-interface layer enables strong interference of optical waves as well as excellent biocompatibility, which is considered to be valuable for biosensing applications.<br/></div> &copy; 2023
Number of references:26
Main heading:Hemoglobin
Controlled terms:Binding sites - Biocompatibility - Biosensors - Diffraction gratings - Fibers - Graphene
Uncontrolled terms:Binding-sites - Fibre surfaces - Functionalized - Functionalized graphene - Graphene oxides - Haemoglobins - Label free - Long-period fibre gratings - Polydopamine - Tapered long-period fiber grating
Classification code:461.2  Biological Materials and Tissue Engineering - 461.9.1  Immunology - 741.3  Optical Devices and Systems - 761  Nanotechnology - 801.2  Biochemistry - 804  Chemical Products Generally
Numerical data indexing:Mass density 3.14E-03kg/m3, Mass density 5.70E-05kg/m3
DOI:10.1016/j.ijleo.2023.170626
Funding details:  Number: -, Acronym: NEDO, Sponsor: New Energy and Industrial Technology Development Organization;
Funding text:This work was supported by a grant from New Energy and Industrial Technology Development Organization (NEDO).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 12>
 
Accession number:20230513463019
Title:Engraving Depth-Controlled Nanohole Arrays on Fused Silica by Direct Short-Pulse Laser Ablation    (Open Access)
Authors:Liu, Xin (1, 2); Clady, Rapha&euml;l (1); Grojo, David (1); Ut&eacute;za, Olivier (1); Sanner, Nicolas (1) 
Author affiliation:(1) Aix Marseille Univ., CNRS, LP3, UMR7341, Marseille; 13288, France; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an; 710119, China 
Corresponding author:Sanner, Nicolas(nicolas.sanner@univ-amu.fr)
Source title:Advanced Materials Interfaces
Abbreviated source title:Adv. Mater. Interfaces
Volume:10
Issue:7
Issue date:March 6, 2023
Publication year:2023
Article number:2202189
Language:English
E-ISSN:21967350
Document type:Journal article (JA)
Publisher:John Wiley and Sons Inc
Abstract:<div data-language="eng" data-ev-field="abstract">Periodic nanohole arrangements constitute an important building block of advanced photonic devices. Aside from standard nanofabrication tools, a direct laser-based approach is introduced here, that enables single-step and point-by-point machining of arrays of holes with subwavelength diameters and depths reaching several micrometers at the surface of fused silica. The method relies on a simple optical arrangement including an axicon combined with an amplitude mask to shape the laser intensity in appropriately truncated micro-Bessel beams of adjustable length. The suitability and limitations of the technique are investigated to fabricate arrays of cylindrical nanoholes with tunable depths. In particular, the challenge of avoiding crosstalk effects during the laser-writing process of high-density arrays is explored. The achievability of square arrays of nanoholes at the surface of fused silica, with diameters down to 200&nbsp;nm and variable depths from 3 to 20&nbsp;&micro;m at a spatial density defined by a pitch of 1.5&nbsp;&micro;m is demonstrated. The performance level shows the potential of the direct-laser-processing method towards the realization of integrated devices, offering a highly flexible and cost-effective alternative technique to current nanofabrication methods.<br/></div> &copy; 2023 The Authors. Advanced Materials Interfaces published by Wiley-VCH GmbH.
Number of references:55
Main heading:Fused silica
Controlled terms:Bessel functions - Cost effectiveness - Laser ablation - Laser beams - Laser materials processing - Nanotechnology - Photonic devices
Uncontrolled terms:Bessel beam - Building blockes - Engraving depths - Laser process - Nanohole arrays - Nanoholes - Periodic nanoholes - Photonics devices - Pulse laser ablation - Short-pulse lasers
Classification code:641.2  Heat Transfer - 741.1  Light/Optics - 741.3  Optical Devices and Systems - 744.8  Laser Beam Interactions - 744.9  Laser Applications - 761  Nanotechnology - 812.3  Glass - 911.2  Industrial Economics - 921  Mathematics
Numerical data indexing:Size 2.00E-07m
DOI:10.1002/admi.202202189
Funding details:  Number: -, Acronym: MESR, Sponsor: Minist&egrave;re de l'Education Nationale, de l'Enseignement Superieur et de la Recherche;Number: -, Acronym: CNRS, Sponsor: Centre National de la Recherche Scientifique;Number: -, Acronym: -, Sponsor: Conseil R&eacute;gional Provence-Alpes-C&ocirc;te d'Azur;
Funding text:The authors thank E. Andr&eacute; for fabricating the annular apertures. This project has received financial support from CNRS through the MITI interdisciplinary programs. French Ministry of Research and High Education, Region Provence&#8208;Alpes&#8208;C&ocirc;te d'Azur, Department of Bouches&#8208;du&#8208;Rh&ocirc;ne, City of Marseille, CNRS, and Aix&#8208;Marseille University were gratefully acknowledged for funding the ASUR platform.The authors thank E. Andr&eacute; for fabricating the annular apertures. This project has received financial support from CNRS through the MITI interdisciplinary programs. French Ministry of Research and High Education, Region Provence-Alpes-C&ocirc;te d'Azur, Department of Bouches-du-Rh&ocirc;ne, City of Marseille, CNRS, and Aix-Marseille University were gratefully acknowledged for funding the ASUR platform.
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Hybrid Gold
 
<RECORD 13>
 
Accession number:20232514277801
Title:Research Status and Prospect of Low Thermal Resistance Liquid-cooled Heatsink Applied in Laser Diode
Title of translation:&#21322;&#23548;&#20307;&#28608;&#20809;&#22120;&#20302;&#28909;&#38459;&#28082;&#20919;&#28909;&#27785;&#30740;&#31350;&#29616;&#29366;&#19982;&#23637;&#26395;
Authors:Chen, Lang (1); Liu, Jiachen (1, 2); Zhang, Jiachen (1); Wang, Zhenfu (1); Wang, Dan (1); Li, Te (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:Li, Te(lite@opt.ac.cn)
Source title:Cailiao Daobao/Materials Reports
Abbreviated source title:Cailiao Daobao/Mater. Rep.
Volume:37
Issue:10
Issue date:May 25, 2023
Publication year:2023
Article number:21120232
Language:Chinese
ISSN:1005023X
Document type:Journal article (JA)
Publisher:Cailiao Daobaoshe/ Materials Review
Abstract:<div data-language="eng" data-ev-field="abstract">In recent decades, the output power of laser diode has been continuously increasing, leading to the restricted problem of thermal loads. The thermal load causes a temperature increment in the active region of the LD chip, which further impacts the chip temperature distribution and leads to a gradual deterioration of the LD bar performance. For a defined package configuration, the thermal resistance of the heatsink becomes a decisive factor in controlling the temperature rise. Therefore, it is important to reduce the thermal resistance of the heatsink in order to improve the output power capability and beam properties of semiconductor lasers. From three aspects:liquid-cooled heatsink materials, liquid-cooled heatsink structures and liquid-cooled refrigerant properties, this paper reviews the evolution of thermal resistance of liquid-cooled heatsinks in the last three decades. We also summarize the factors influencing thermal resistance during the development of liquid-cooled heatsinks, and further discuss the development direction and application prospects of heatsink thermal resistance reduced.<br/></div> &copy; 2023 Cailiao Daobaoshe/ Materials Review. All rights reserved.
Number of references:117
Main heading:Semiconductor lasers
Controlled terms:Deterioration - Heat resistance - Heat sinks - Refrigerants - Thermal load
Uncontrolled terms:Active regions - Chip temperature - Liquid cooled - Liquid-cooled heatsink - Output power - Performance - Research status - Restricted problem - Status and prospect - Temperature increment
Classification code:616.1  Heat Exchange Equipment and Components - 644.2  Refrigerants - 744.4.1  Semiconductor Lasers - 803  Chemical Agents and Basic Industrial Chemicals - 951  Materials Science
DOI:10.11896/cldb.21120232
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 14>
 
Accession number:20232114131598
Title:Broadband Mid-Infrared Frequency Comb Generation in a Large-Cross-Section Silicon Microresonator    (Open Access)
Authors:Wang, Wenrui (1, 2); Ming, Xianshun (1); Shi, Lei (1, 2); Ma, Kai (1); Ren, Dezheng (1, 2); Sun, Qibing (1); Wang, Leiran (1, 2); Zhang, Wenfu (1, 2) 
Author affiliation:(1) Chinese Academy of Sciences, State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China 
Corresponding author:Wang, Leiran(lionking@opt.ac.cn)
Source title:IEEE Photonics Journal
Abbreviated source title:IEEE Photon. J.
Volume:15
Issue:3
Issue date:June 1, 2023
Publication year:2023
Article number:6601406
Language:English
E-ISSN:19430655
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">As a novel portable and robust broadband coherent light source, mid-infrared (MIR) Kerr microresonator-based frequency combs (microcombs) have prospective applications in the precision spectroscopy of molecules and biochemical sensing. The mature integrated silicon photonics platform is well suited for the MIR microcombs study because silicon has both large linear and nonlinear refractive index, but the transparency window of the platform is limited by the cladding material. Here, we numerically demonstrate the generation of a broadband MIR comb in a silicon microring resonator, harnessing the large-cross-section air-cladding waveguide to alleviate the absorption loss. The effects of higher order nonlinearities are also investigated, which show that the effect of five-photon absorption around the pump wavelength (4.78 &mu;m) is negligible while an octave-spanning (3.5-8 &mu;m) Raman-Kerr comb line can be obtained with the assistance of Raman effect and a quite pure Kerr frequency soliton comb can also be achieved at large detuning. The proposed structure can be compatible with the CMOS technology, thus can be a very promising solution to the MIR integrated photonics.<br/></div> &copy; 2009-2012 IEEE.
Number of references:46
Main heading:Nonlinear optics
Controlled terms:Cladding (coating) - Infrared devices - Light sources - Microresonators - Optical communication - Photonic devices - Quantum cascade lasers - Refractive index - Silicon photonics - Waveguides
Uncontrolled terms:Broadband Communication - Coherent light sources - Frequency combs - Large cross-sections - Micro resonators - Mid-infrared frequency combs - Midinfrared - Propagation loss - Silicon microresonators - Silicon photonics
Classification code:714.3  Waveguides - 717.1  Optical Communication Systems - 741.1  Light/Optics - 741.1.1  Nonlinear Optics - 741.3  Optical Devices and Systems - 744.1  Lasers, General - 744.7  Laser Components
DOI:10.1109/JPHOT.2023.3273731
Funding details:  Number: E2291114,YSBR-069, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 2022JC-43, Acronym: -, Sponsor: Natural Science Basic Research Program of Shaanxi Province;
Funding text:This work was supported by the CAS Project forYoung Scientists in Basic Research underGrant YSBR-069, in part by Special Research Associate underGrant E2291114, in part by theWest Light Foundation of CAS, and in part by the Natural Science Basic Research Program of Shaanxi Province under Grant 2022JC-43.
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
 
<RECORD 15>
 
Accession number:20230213361633
Title:High-precision gaseous flame temperature field measurement based on quadriwave-lateral shearing interferometry
Authors:Yuan, Xun (1, 2); Xue, Yuge (1, 2); Min, Junwei (1); Yu, Xianghua (1); Li, Manman (1); Li, Runze (1); Yao, Baoli (1, 2) 
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China 
Corresponding author:Min, Junwei(mjw@opt.ac.cn)
Source title:Optics and Lasers in Engineering
Abbreviated source title:Opt Lasers Eng
Volume:162
Issue date:March 2023
Publication year:2023
Article number:107430
Language:English
ISSN:01438166
CODEN:OLENDN
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">Quadriwave-lateral shearing interferometry (QLSI) has a broad utilization in quantitative phase imaging (QPI) for refraction-type objects due to its compact structure and stable performance against external disturbance. Here we propose to use the QLSI technique to image and measure the gaseous flame temperature field distribution in high precision. The quantitative phase image of an axisymmetric candle flame is firstly reconstructed from the wire-mesh-like QLSI interferogram, and then the three-dimensional temperature field distribution is calculated with the axisymmetric projection transform algorithm. Compared to the conventional digital holographic interferometry (DHI) based on Mach-Zehnder architecture, the proposed method possesses a high-precision measurement and better stability in disturbed environment, benefiting from the compact common-path structure of QLSI. The temperature measurement errors of the proposed QLSI method are &plusmn;5.0 K and &plusmn;5.3 K in the presence of airflow disturbance and mechanical vibration, respectively, while those of the DHI method are &plusmn;7.6 K and &plusmn;12.9 K, respectively.<br/></div> &copy; 2022 Elsevier Ltd
Number of references:28
Main heading:Temperature measurement
Controlled terms:Holographic interferometry - Shearing - Temperature - Vibrations (mechanical)
Uncontrolled terms:Axisymmetric - Digital holographic interferometry - Flame temperature field - Gaseous flame - High-precision - Lateral shearing interferometry - Quadriwave-lateral shearing interferometry - Quantitative phase imaging - Temperature field distribution - Temperature field measurements
Classification code:604.1  Metal Cutting - 641.1  Thermodynamics - 931.1  Mechanics - 944.6  Temperature Measurements
Numerical data indexing:Temperature 1.29E+01K, Temperature 5.00E+00K, Temperature 5.30E+00K, Temperature 7.60E+00K
DOI:10.1016/j.optlaseng.2022.107430
Funding details:  Number: 61,975,233, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2,019,393, Acronym: YIPA CAS, Sponsor: Youth Innovation Promotion Association of the Chinese Academy of Sciences;Number: 2020SF-193,2021GY-079, Acronym: -, Sponsor: Shanxi Provincial Key Research and Development Project;
Funding text:National Natural Science Foundation of China (61,975,233); Youth Innovation Promotion Association, CAS (2,019,393); Key Research and Development Program of Shaanxi Province (2020SF-193, 2021GY-079).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 16>
 
Accession number:20230213352971
Title:30 W all-fiber supercontinuum generation via graded-index multimode fiber pumped by picoseconds laser pulse
Authors:Zhang, Ting (1, 2); Hu, Xiaohong (1); Pan, Ran (1, 2); Wang, Zhenguang (1); Zhang, Wei (1); Guo, Yashuai (1, 2); Feng, Ye (1); Wang, Yishan (1); Zhao, Wei (1) 
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China 
Corresponding author:Zhang, Ting(zhangting712@opt.ac.cn)
Source title:Optics and Laser Technology
Abbreviated source title:Opt Laser Technol
Volume:159
Issue date:April 2023
Publication year:2023
Article number:108943
Language:English
ISSN:00303992
CODEN:OLTCAS
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">We demonstrated an over 30 W all-fiber supercontinuum source based on a four-mode graded-index multimode fiber (GIMF) pumped by around 5 picoseconds laser pulse. Following the evolution of the supercontinuum, it is reasonable to conclude that the discrete spectral peaks in the range 350&ndash;700 nm were generated owing to the geometric parametric instability effect and quasi-phase matched harmonic generation, whereas the radiation of dispersive waves, stimulated Raman scattering, and relative effects of optical soliton caused spectral broadening ranging from 700 nm to 1750 nm (and even to 2400 nm). Furthermore, the properties of the supercontinua generated in the four-mode GIMF and the 50/125 standard GIMF were experimentally compared. This comparison implied that the wavelengths radiated by the geometric parametric instability differed owing to different dispersion values. And the supercontinuum generated by the four-mode GIMF had a flatter spectral profile and a wider wavelength range.<br/></div> &copy; 2022
Number of references:38
Main heading:Optical pumping
Controlled terms:Dispersion (waves) - Geometry - Laser pulses - Multimode fibers - Phase matching - Radiation effects - Stimulated Raman scattering - Supercontinuum generation
Uncontrolled terms:All fiber - Geometric parametric instability - Graded-Index Multimode fibers - Harmonics generation - Parametric instabilities - Picosecond laser pulse - Quasi-phase-matched - Spectral peak - Super continuum - Supercontinuum sources
Classification code:711  Electromagnetic Waves - 713  Electronic Circuits - 741.1  Light/Optics - 741.1.1  Nonlinear Optics - 741.1.2  Fiber Optics - 744.1  Lasers, General - 921  Mathematics
Numerical data indexing:Power 3.00E+01W, Size 2.40E-06m, Size 3.50E-07m to 7.00E-07m, Size 7.00E-07m to 1.75E-06m
DOI:10.1016/j.optlastec.2022.108943
Funding details:  Number: 61690222,61875227, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This research is supported by National Natural Science Foundation of China (No. 61690222 ) and (No. 61875227 ).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 17>
 
Accession number:20224513088218
Title:Third-Order Nonlinear Effect and Polarization-Dependent Modulation Using Spherical-Like MoS<inf>2</inf> Nanoparticles
Authors:Li, Tianlun (1); Hao, Rui (2); Hou, Yaping (1); Gao, Duorui (3); Xu, Yunfan (1); Zhang, Yanpeng (1); Fang, Jixiang (2); Zhang, Lei (1) 
Author affiliation:(1) Key Laboratory of Physical Electronics and Devices of Ministry of Education, School of Electronic Science and Engineering, Xi'an Jiaotong University, Xi'an; 710049, China; (2) Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an; 710049, China; (3) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an; 710119, China 
Corresponding author:Zhang, Lei(eiezhanglei@xjtu.edu.cn)
Source title:Annalen der Physik
Abbreviated source title:Ann Phys Leipzig
Volume:535
Issue:1
Issue date:January 2023
Publication year:2023
Article number:2200378
Language:English
ISSN:00033804
E-ISSN:15213889
CODEN:ANPYA2
Document type:Journal article (JA)
Publisher:John Wiley and Sons Inc
Abstract:<div data-language="eng" data-ev-field="abstract">A type of MoS<inf>2</inf> nanoparticle with a spherical-like shape is chemically synthesized with favorable third-order and suppressed second-order nonlinear optical response, which results from the isotropy induced by the geometrical uniformity of nanoparticles and an artificial symmetry center. It is found that the linewidth of third harmonic signal is broadened due to the self-phase modulation effect, another third-order nonlinearity. Moreover, the intensity of harmonic signal can be conveniently adjusted by controlling the polarization state of applied optical field. The artificially designed material morphology may provide a reference for designing all-optical modulation devices.<br/></div> &copy; 2022 Wiley-VCH GmbH.
Number of references:30
Main heading:Harmonic generation
Controlled terms:Harmonic analysis - Layered semiconductors - Metal nanoparticles - Modulation - Molybdenum compounds - Nonlinear optics - Polarization - Sulfur compounds - Synthesis (chemical) - Transition metals
Uncontrolled terms:Isotropy medium - Nonlinear polarizations - Polarization dependence - Second-order nonlinear optical - Synthesised - Third order - Third-harmonic generation - Third-order nonlinear effect - Transition metal dichalcogenide material - Transition metal dichalcogenides (TMD)
Classification code:531  Metallurgy and Metallography - 712.1  Semiconducting Materials - 741.1.1  Nonlinear Optics - 761  Nanotechnology - 802.2  Chemical Reactions - 921.6  Numerical Methods
DOI:10.1002/andp.202200378
Funding details:  Number: -, Acronym: XJTU, Sponsor: Xi&rsquo;an Jiaotong University;Number: xzy022021039, Acronym: -, Sponsor: Fundamental Research Funds for the Central Universities;Number: 2021TD‐56, Acronym: -, Sponsor: Shaanxi Key Science and Technology Innovation Team Project;
Funding text:The authors acknowledge the Fundamental Research Funds for the Central Universities (xzy022021039), the Shaanxi Key Science and Technology Innovation Team Project (2021TD&#8208;56), and the Young Talent Recruiting Plans of Xi'an Jiaotong University. The characterizations of materials were supported by Instrument Analysis Center of Xi'an Jiaotong University.
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 18>
 
Accession number:20232614309901
Title:Numerical simulation of the argon dielectric barrier discharge driven by dual frequency at atmospheric pressure
Authors:Qi, Bing (1, 2, 3, 4); Tian, Xiao (5); Zhang, Tao (6); Wang, Jing (7); Wang, Yishan (1, 3); Si, Jinhai (2); Tang, Jie (1, 3) 
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, Xi'an; 710119, China; (2) Shaanxi Key Lab of Information Photonic Technique, School of Electronic Science and Engineering, Xi'An Jiaotong University, Xi'an; 710049, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China; (4) College of Sciences, Xi'An University of Science and Technology, Xi'an; 710054, China; (5) College of Sciences, Xi'An Aeronautical Institute, Xi'an; 710077, China; (6) College of Materials Science and Engineering, Xi'An University of Science and Technology, Xi'an; 710054, China; (7) College of Sciences, Henan Agricultural University, Zhengzhou; 450002, China 
Corresponding author:Tang, Jie(tangjie@opt.ac.cn)
Source title:AIP Advances
Abbreviated source title:AIP Adv.
Volume:13
Issue:6
Issue date:June 1, 2023
Publication year:2023
Article number:065327
Language:English
E-ISSN:21583226
Document type:Conference article (CA)
Publisher:American Institute of Physics Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Argon dielectric barrier discharge driven by the dual frequency at atmospheric pressure has been investigated by a 1D fluid model. Temporal evolutions of voltage and charge density on dielectric surface, fluxes of electrons and ions on the surface, the spatiotemporal distribution of electron generation rate, and the spatial distribution of electron density are studied with various low-frequency (LF) voltages. Minimum sustained discharge amplitude of high frequency (HF) voltage and spatiotemporal mean electron density over one LF period varying with sheath voltage (&alpha; &rarr; &gamma;) are also discussed. Results show that in &alpha; mode, the electron flux on the dielectric surface decreases significantly when the LF voltage amplitude is lower while the ion flux is less affected. The positive charge density on the surface increases, causing the surface voltage waveform to shift upward. When the LF voltage amplitude is 40 V and that of HF voltage is 87 V, the positive and negative values of voltage amplitude of dielectric surface are 182 and 32 V. As the LF voltage amplitude increases further, the sheath formation time is significantly delayed and the discharge terminates, and the rate of electron generation decreases significantly. The discharge is extinguished when the amplitude of LF voltage is 68 V while it regains when the amplitude reaches up to 750 V. In &gamma; mode, when the amplitude of HF voltage reaches or exceeds its minimum sustained discharge value, the generation and distribution of electrons are almost unaffected by the amplitude of LF voltage.<br/></div> &copy; 2023 Author(s).
Number of references:36
Main heading:Dielectric barrier discharge
Controlled terms:Argon - Atmospheric pressure - Carrier concentration - Dielectric devices - Dielectric materials - Electron density measurement - Electrons - Flow control - Spatial distribution
Uncontrolled terms:Dielectric barrier discharges - Dielectric surface - Discharge driven - Dual frequency - Electron generation - Fluid modeling - High-frequency voltage - Low frequency voltage - Temporal evolution - Voltage amplitude
Classification code:405.3  Surveying - 443.1  Atmospheric Properties - 631.1  Fluid Flow, General - 701.1  Electricity: Basic Concepts and Phenomena - 708.1  Dielectric Materials - 731.3  Specific Variables Control - 804  Chemical Products Generally - 902.1  Engineering Graphics - 921  Mathematics
Numerical data indexing:Voltage 1.82E+02V, Voltage 3.20E+01V, Voltage 4.00E+01V, Voltage 6.80E+01V, Voltage 7.50E+02V, Voltage 8.70E+01V
DOI:10.1063/5.0152839
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 19>
 
Accession number:20231313804280
Title:Reconstruction of structured illumination microscopy with an untrained neural network
Authors:Liu, Xin (1); Li, Jinze (2); Fang, Xiang (1); Li, Jiaoyue (1); Zheng, Juanjuan (1, 3); Li, Jianlang (1); Ali, Nauman (1); Zuo, Chao (1, 4); Gao, Peng (1); An, Sha (1) 
Author affiliation:(1) School of Physics, Xidian University, Xi'an, China; (2) School of Optoelectronic Engineering, 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; (4) Smart Computational Imaging Laboratory (SCILab), School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing, JS, China 
Corresponding authors:Zuo, Chao(zuochao@njust.edu.cn); Gao, Peng(peng.gao@xidian.edu.cn)
Source title:Optics Communications
Abbreviated source title:Opt Commun
Volume:537
Issue date:June 15, 2023
Publication year:2023
Article number:129431
Language:English
ISSN:00304018
CODEN:OPCOB8
Document type:Journal article (JA)
Publisher:Elsevier B.V.
Abstract:<div data-language="eng" data-ev-field="abstract">Structured illumination microscopy (SIM) is one of super-resolution optical microscopic techniques, and it has been widely used in biological research. In this paper, a physics-driven deep image prior framework for super-resolution reconstruction of SIM (entitled DIP-SIM) is proposed. DIP-SIM does not rely on a large number of labeled data, and the output becomes more interpretable due to the intrinsic constraint of a physical model. Both the simulation and experiment verify that DIP-SIM can reconstruct a super-resolution image with a quality comparable to conventional SIM. Of note, it allows for super-resolution reconstruction from three raw images for two-orientation SIM and four raw images for three-orientation SIM, and hence it has a much faster imaging speed and lower photobleaching compared with the traditional SIM. We can envisage that the proposed method can be applied to chemistry and biomedical fields, etc.<br/></div> &copy; 2023 Elsevier B.V.
Number of references:35
Main heading:Image reconstruction
Controlled terms:Deep learning - Optical resolving power - Photobleaching
Uncontrolled terms:Biological research - Deep learning - Images reconstruction - Microscopic techniques - Neural-networks - Raw images - Structured illumination - Structured illumination microscopy - Super-resolution reconstruction - Superresolution
Classification code:461.4  Ergonomics and Human Factors Engineering - 741.1  Light/Optics - 801  Chemistry
DOI:10.1016/j.optcom.2023.129431
Funding details:  Number: 2019JJ012, Acronym: -, Sponsor: -;Number: 62075177, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2023JCQN0731,2023JCYB518, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;Number: 2021YFF0700303,2022YFE0100700, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;Number: 2023-JC-QN-0765, Acronym: -, Sponsor: Natural Science Basic Research Program of Shaanxi Province;
Funding text:The authors acknowledge the support from the National Key Research and Development Program of China ( 2022YFE0100700 and 2021YFF0700303 ); the National Natural Science Foundation of China ( NSFC 62075177 ); the Natural Science Foundation of Shaanxi Province, China ( 2023JCQN0731 , 2023JCYB518 ); Exchange Program Between China-and Poland (2021&ndash;2022) ; Key Laboratory of Wuliangye-flavor Liquor Solid-state Fermentation, China National Light Industry ( 2019JJ012 ); Natural Science Basic Research Program of Shaanxi, China (No. 2023-JC-QN-0765 ).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 20>
 
Accession number:20231313797642
Title:When optical vortex array meets cycloid    (Open Access)
Authors:Ma, Xin (1); Hu, Huajie (1); Tai, Yuping (1, 2); Li, Xinzhong (1, 2) 
Author affiliation:(1) School of Physics and Engineering, Henan University of Science and Technology, Luoyang; 471023, 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:Li, Xinzhong(xzli@haust.edu.cn)
Source title:Optics Express
Abbreviated source title:Opt. Express
Volume:31
Issue:7
Issue date:March 27, 2023
Publication year:2023
Pages:11499-11507
Language:English
E-ISSN:10944087
Document type:Conference article (CA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">Optical vortex arrays (OVAs) have drawn widespread attention owing to their multiple optical vortices and higher dimensions. However, existing OVAs have not yet been utilized to exploit the synergy effect as an entire system, particularly for manipulating multiple particles. Thus, the functionality of OVA should be explored to respond to application requirements. Hence, this study proposes a functional OVA, called cycloid OVA (COVA), based on a combination of cycloid and phase-shift techniques. By modifying the cycloid equation, multiple structural parameters are designed to modulate the structure of the COVAs. Subsequently, versatile and functional COVAs are experimentally generated and modulated. In particular, COVA executes local dynamic modulation, whereas the entire structure remains unchanged. Further, the optical gears are first designed using two COVAs, which exhibit potential for transferring multiple particles. Essentially, OVA is endowed the characteristics and capacity of the cycloid when they meet. This work provides an alternative scheme to generate OVAs, which will open up advanced applications for the complex manipulation, arrangement and transfer of multiple particles.<br/></div> &copy; 2023 Optica Publishing Group.
Number of references:35
Uncontrolled terms:Application requirements - Entire system - Higher dimensions - Local dynamics - Multiple particles - Optical vortices - Phase shift techniques - Structural parameter - Synergy effect - Vortex arrays
DOI:10.1364/OE.484830
Funding details:  Number: 21zx002, Acronym: -, Sponsor: -;Number: 11974102,12274116, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 232300421019, Acronym: -, Sponsor: Natural Science Foundation of Henan Province;
Funding text:Funding. State Key Laboratory of Transient Optics and Photonics (SKLST202216); Key Scientific Research Projects of Institutions of Higher Learning of the Henan Province Education Department (21zx002); National Natural Science Foundation of China (11974102, 12274116); Natural Science Foundation of Henan Province (232300421019).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
 
<RECORD 21>
 
Accession number:20230213371598
Title:Gibbs-Wulff optical vortex array
Authors:Qin, Xue-Yun (1); Zhu, Liu-Hao (1); Hu, Hua-Jie (1); Tai, Yu-Ping (1, 2); Li, Xin-Zhong (1, 2) 
Author affiliation:(1) School of Physics and Engineering, Henan University of Science and Technology, Luoyang; 471023, 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 authors:Tai, Yu-Ping(yptai@haust.edu.cn); Li, Xin-Zhong(xzli@haust.edu.cn)
Source title:Journal of Applied Physics
Abbreviated source title:J Appl Phys
Volume:133
Issue:1
Issue date:January 7, 2023
Publication year:2023
Article number:013101
Language:English
ISSN:00218979
E-ISSN:10897550
CODEN:JAPIAU
Document type:Journal article (JA)
Publisher:American Institute of Physics Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Optical vortex array (OVA) containing multiple optical vortices is an optimal candidate for applications of optical communications, complex manipulation of multi-particle systems, and mass-synchronous fabrication. However, the existing OVAs have not been constructed to respond to the application requirements, particularly for micro-/nanomaterial fabrication where the boundary, size, and stability need to be carefully considered. To address this issue, we propose a Gibbs-Wulff OVA (GWOVA) by analogizing the Gibbs-Wulff theorem in solid-state physics. Herein, the Gibbs-Wulff theorem is first generalized to OVA's generation as the condition to confine its growth boundary. The GWOVA, which possesses versatile structures and arrangement modes (simple- and close-packed modes), is successfully generated and grown. It exhibits high stability and perfect symmetry during growth and rotation, which satisfies the symmetric group of D2s. Owing to its stable structure and growth boundary conditions, the GWOVA has great potential for a wide range of applications, particularly in micro-/nanomaterial fabrication.<br/></div> &copy; 2023 Author(s).
Number of references:37
Main heading:Optical communication
Controlled terms:Vortex flow
Uncontrolled terms:Application requirements - Condition - Growth boundaries - Multi-particle systems - Nanomaterials fabrication - Optical vortices - Particle mass - Simple++ - Solid-state physics - Vortex arrays
Classification code:631.1  Fluid Flow, General - 717.1  Optical Communication Systems
DOI:10.1063/5.0133068
Funding details:  Number: 21zx002, Acronym: -, Sponsor: -;Number: 11974102,12274116, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: SKLST202201, Acronym: SKLTOP, Sponsor: State Key Laboratory of Transient Optics and Photonics;
Funding text:This work was supported by the Key Scientific Research Projects of Institutions of Higher Learning of the Henan Province Education Department (No. 21zx002), National Natural Science Foundation of China (NNSFC) (Nos. 11974102 and 12274116), and State Key Laboratory of Transient Optics and Photonics (No. SKLST202201).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 22>
 
Accession number:20231714024863
Title:Tailoring of the femtosecond-laser-induced damage properties and hydrolysis resistance of fluoroaluminate glass
Authors:Yang, Yuze (1, 2); Li, Xianda (1, 2); Guo, Chen (1, 2); Wang, Pengfei (1, 2) 
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) Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing; 100049, China 
Corresponding author:Wang, Pengfei(pfwang@opt.ac.cn)
Source title:Ceramics International
Abbreviated source title:Ceram Int
Volume:49
Issue:14
Issue date:July 15, 2023
Publication year:2023
Pages:23340-23348
Language:English
ISSN:02728842
CODEN:CINNDH
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">In this study, we investigated and compared the hydrolysis resistance properties of three different types of fluoride glasses and their damage characteristics induced by an 800 nm fs (fs) laser. The results show that the hydrolysis resistance of the fluoroaluminate (AYF) glass is significantly higher than that of the fluorozirconate (ZBLAN) and the fluoroindate (IZBS) glass. After soaking in distilled water for 7 days, the average transmittance of the fluoroaluminate glass (AYF) remains around 80% in the range of 2&ndash;6 &mu;m, while that of the other two glasses decrease to zero at the hydroxyl group absorption wavelength of &sim;2.96 &mu;m. After 24 h of immersion, the mass loss rate of AYF glass is less than one-eleventh of ZBLAN glass and one-eighth of IZBS glass, respectively. Under the irradiation of fs laser (800 nm, 91 fs, 1 kHz), the "1-on-1&Prime; mode laser-induced damage threshold of the AYF glass is as high as 5164.9 mJ/cm<sup>2</sup>, which is 80.3% higher than that of the IZBS glass (2863.3 mJ/cm<sup>2</sup>) and 16.8% higher than that of the ZBLAN glass (4420.1 mJ/cm<sup>2</sup>). The higher laser damage threshold is attributed to the relative larger optical bandgap and higher Al&ndash;F energies of the AYF glass. Using this mechanism, we further tailored the fluoroaluminate glass's optical bandgap increased and the accumulation rate of electrons decreased by introducing up to 20 mol % TeO<inf>2</inf> into the AYF glass, finally the fs laser-induced damage threshold of the corresponding sample with 20 mol % TeO<inf>2</inf> increased by about 79.5% to the maximum 9272.2 mJ/cm<sup>2</sup>, compared with the TeO<inf>2</inf>-free AYF sample.<br/></div> &copy; 2023 Elsevier Ltd and Techna Group S.r.l.
Number of references:54
Main heading:Glass
Controlled terms:Energy gap - Femtosecond lasers - Fluorine compounds - Hydrolysis - Laser damage - Tellurium compounds - Water absorption
Uncontrolled terms:Fluoroaluminate glass - Fs laser - Fs laser-induced damage threshold - Hydrolysis resistance - Laser induced damage thresholds - Laser-induced damage - Mid-infrared - Midinfrared - Optical-bandgap - ZBLAN glass
Classification code:744.1  Lasers, General - 744.8  Laser Beam Interactions - 802.2  Chemical Reactions - 802.3  Chemical Operations - 812.3  Glass
Numerical data indexing:Age 1.918E-02yr, Amount of substance 2.00E+01mol, Energy 2.8633E+00J, Energy 4.4201E+00J, Energy 5.1649E+00J, Energy 9.2722E+00J, Frequency 1.00E+03Hz, Percentage 1.68E+01%, Percentage 7.95E+01%, Percentage 8.00E+01%, Percentage 8.03E+01%, Size 2.00E-06m to 6.00E-06m, Size 2.96E-06m, Size 8.00E-07m, Time 8.64E+04s, Time 9.10E-14s
DOI:10.1016/j.ceramint.2023.04.166
Funding details:  Number: 61775235, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2017446, Acronym: YIPA CAS, Sponsor: Youth Innovation Promotion Association of the Chinese Academy of Sciences;Number: 2021GY-251, Acronym: -, Sponsor: Shanxi Provincial Key Research and Development Project;
Funding text:This work is financially supported by the National Natural Science Foundation of China (NSFC No. 61775235 ), Shaanxi Provincial Key Research and Development Program ( 2021GY-251 ), and Youth Innovation Promotion Association, CAS ( 2017446 ).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 23>
 
Accession number:20230713583708
Title:Cycloid-structured optical tweezers
Authors:Wei, Wenjun (1); Zhu, Liuhao (1); Tai, Yuping (1, 2); Li, Xinzhong (1, 2) 
Author affiliation:(1) School of Physics and Engineering, Henan University of Science and Technology, Luoyang; 471023, 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:Li, Xinzhong(xzli@haust.edu.cn)
Source title:Optics Letters
Abbreviated source title:Opt. Lett.
Volume:48
Issue:4
Issue date:February 15, 2023
Publication year:2023
Pages:972-975
Language:English
ISSN:01469592
E-ISSN:15394794
CODEN:OPLEDP
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">We designed novel cycloid-structured optical tweezers based on a modified cycloid and holographic shaping techniques. The optical tweezers realize all the dynamic characteristics of the trapped particles, including start, stop, and variable-velocity motions along versatile trajectories. The superiority of the tweezers is experimentally verified using polystyrene micro-sphere manipulation. This work provides a novel platform for more complex manipulations of particles.<br/></div> &copy; 2023 Optica Publishing Group.
Number of references:23
Main heading:Optical tweezers
Uncontrolled terms:Dynamics characteristic - Polystyrene micro-spheres - Shaping techniques - Trapped particle - Variable-velocity motion
Classification code:744.9  Laser Applications
DOI:10.1364/OL.482437
Funding details:  Number: 21zx002, Acronym: -, Sponsor: -;Number: 11974102,12274116, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: SKLST202216, Acronym: SKLTOP, Sponsor: State Key Laboratory of Transient Optics and Photonics;
Funding text:Funding. National Natural Science Foundation of China (11974102, 12274116); Key Scientific Research Projects of Institutions of Higher Learning of the Henan Province Education Department (No. 21zx002); State Key Laboratory of Transient Optics and Photonics (SKLST202216).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 24>
 
Accession number:20231713946298
Title:Snapshot dual-view 3D imaging    (Open Access)
Authors:Ji, Chao (1, 2); Fang, Mengyan (1, 2); Xin, Liwei (1, 3); He, Kai (1); Li, Yahui (1); Wang, Xing (1); Tian, Jinshou (1, 4) 
Author affiliation:(1) Key Laboratory of Ultra-fast Photoelectric Diagnostics Technology, Xi'an Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences (CAS), Shaanxi, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Rocket Force University of Engineering, Shaanxi, Xi'an; 710025, China; (4) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shaanxi, Xi'an; 710119, China 
Corresponding authors:Wang, Xing(wangxing@opt.ac.cn); Tian, Jinshou(tianjs@opt.ac.cn)
Source title:AIP Advances
Abbreviated source title:AIP Adv.
Volume:13
Issue:4
Issue date:April 1, 2023
Publication year:2023
Article number:045213
Language:English
E-ISSN:21583226
Document type:Journal article (JA)
Publisher:American Institute of Physics Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Multi-view 3D imaging is an indispensable imaging method for self-driving, 3D modeling, and other fields. However, there remains a scarcity of fast and efficient multi-view 3D imaging methods. In the present study, a snapshot dual-view 3D imaging setup based on the Coded Aperture Imaging method was introduced and experimentally demonstrated. The proposed method can simultaneously obtain 3D information from different views by means of a streak camera and two independent masks. Compared with traditional 3D imaging technology, our technique can meet the integrity and real-time requirements of 3D imaging while reducing the hardware cost of existing multi-view imaging methods.<br/></div> &copy; 2023 Author(s).
Number of references:51
Main heading:3D modeling
Controlled terms:Imaging systems
Uncontrolled terms:3D imaging - 3D information - 3D models - 3d-modeling - Coded aperture imaging - Imaging method - Imaging technology - Multi-views - Real time requirement - Self drivings
Classification code:723.2  Data Processing and Image Processing - 746  Imaging Techniques
DOI:10.1063/5.0142500
Funding details:  Number: 2021SR5061, Acronym: -, Sponsor: -;Number: 12105360,62075236, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: GJJSTD20220006, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 2020397, Acronym: YIPA CAS, Sponsor: Youth Innovation Promotion Association of the Chinese Academy of Sciences;
Funding text:This work was supported by the Scientific Instrument Developing Project of the Chinese Academy of Sciences under Grant No. GJJSTD20220006, the National Natural Science Foundation of China under Grant Nos. 12105360 and 62075236, the Youth Innovation Promotion Association of the Chinese Academy of Sciences under Grant No. 2020397, and the Rising Research Star of Shaanxi Province under Grant No. 2021SR5061.
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
 
<RECORD 25>
 
Accession number:20231013688651
Title:Spectral Token Guidance Transformer for Multisource Images Change Detection    (Open Access)
Authors:Sun, Bangyong (1, 2); Liu, Qinsen (1); Yuan, Nianzeng (1); Tan, Jiahai (3, 4); Gao, Xiaomei (5); Yu, Tao (6) 
Author affiliation:(1) Xi'an University of Technology, School of Printing, Packaging, and Digital Media, Xi'an; 710048, China; (2) Qilu University of Technology, Shandong Academy of Sciences, Key Laboratory of Pulp and Paper Science and Technology, Ministry of Education, Jinan; 250316, China; (3) Xi'an Technological University, School of Optoelectronic Engineering, Xi'an; 710021, China; (4) Chinese Academy of Sciences, State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Xi'an; 710119, China; (5) Mapping and Printing of China National Administration of Coal Geology, Xi'an; 710199, China; (6) Chinese Academy of Sciences, Key Laboratory of Spectral Imaging Technology Cas, Xi'an Institute of Optics and Precision Mechanics, Xi'an; 710119, China 
Corresponding author:Yu, Tao(yutao@opt.ac.cn)
Source title:IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Abbreviated source title:IEEE J. Sel. Top. Appl. Earth Obs. Remote Sens.
Volume:16
Issue date:2023
Publication year:2023
Pages:2559-2572
Language:English
ISSN:19391404
E-ISSN:21511535
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">With the development of Earth observation technology, more multisource remote sensing images are obtained from various satellite sensors and significantly enrich the data source of change detection (CD). However, the utilization of multisource bitemporal images frequently introduces challenges during featuring or representing the various physical mechanisms of the observed landscapes and makes it more difficult to develop a general model for homogeneous and heterogeneous CD adaptively. In this article, we propose an adaptive spatial-spectral transformer CD network based on spectral token guidance, named STCD-Former. Specifically, a spectral transformer with dual-branch first encodes the diverse spectral sequence in spectral-wise to generate a corresponding spectral token. And then, the spectral token is used as guidance to interact with the patch token to learn the change rules. More significantly, to optimize the learning of difference information, we design a difference amplification module to highlight discriminative features by adaptively integrating the difference information into the feature embedding. Finally, the binary CD result is obtained by multilayer perceptron. The experimental results on three homogeneous datasets and one heterogeneous dataset have demonstrated that the proposed STCD-Former outperforms the other state-of-the-art methods qualitatively and visually.<br/></div> &copy; 2008-2012 IEEE.
Number of references:44
Main heading:Feature extraction
Controlled terms:Change detection - Job analysis - Remote sensing
Uncontrolled terms:Adaptation models - Change detection - Features extraction - Heterogeneous image - HyperSpectral - Hyperspectral image - Multispectral images - Task analysis - Transformer
DOI:10.1109/JSTARS.2023.3251962
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
 
<RECORD 26>
 
Accession number:20230613553610
Title:Femtosecond Yb-doped tapered fiber pulse amplifiers with peak power of over hundred megawatts    (Open Access)
Authors:Cao, Xue (1, 2, 3); Li, Qianglong (1, 2, 3); Li, Feng (1); Zhao, Hualong (1); Zhao, Wei (1); Wang, Yishan (1); Li, Dongjuan (1); Yang, Yang (1); Wen, Wenlong (1); Si, Jinhai (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) Key Laboratory for Physical Electronics and Devices of the Ministry of Education, Shaanxi Key Lab of Information Photonic Technique, School of Electronics and Information Engineering Xi'an Jiaotong University, Xi'an; 710049, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China 
Corresponding author:Li, Feng(lifeng@opt.ac.cn)
Source title:Optics Express
Abbreviated source title:Opt. Express
Volume:31
Issue:4
Issue date:February 1, 2023
Publication year:2023
Pages:5507-5518
Language:English
E-ISSN:10944087
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">Ultrafast fiber lasers combining high peak power and excellent beam quality in the 1-&mu;m wavelength range have been explored to applications in industry, medicine and fundamental science. Here, we report generation of a high-energy sub 300 fs polarization maintaining fiber chirped pulse amplification (CPA) system by using a Yb-doped large mode area tapered polarization maintaining (PM) optical fiber with the core/cladding diameters of 35/250 &mu;m at the thin end and 56/400 &mu;m at the thick end. The taper fiber design features a confined core for selective gain amplification and multi-layer cladding for enhanced suppression of higher order modes. In this regime, we have demonstrated 266 fs pulse amplification with peak power of up to 132 MW at a repetition rate of 2 MHz and high beam quality with measured M2 value of 1.1&sim;1.3. To the best of our knowledge, it is the highest peak power reported in such tapered Yb-doped fiber (T-YDF) amplifier in the femtosecond regime. This work indicates the great potential of the T-YDF to realize further power scaling, high laser efficiency, and excellent beam quality in high-power femtosecond fiber lasers.<br/></div> &copy; 2023 Optica Publishing Group.
Number of references:39
Main heading:Polarization-maintaining fiber
Controlled terms:Amplification - Fiber amplifiers - Fiber lasers - Polarization - Pulse amplifiers - Pulse repetition rate - Ultrashort pulses
Uncontrolled terms:Beams quality - Energy - Femtoseconds - High peak power - Peak power - Report generation - Tapered fiber - Ultrafast fiber lasers - Wavelength ranges - Yb-doped
Classification code:713.1  Amplifiers - 713.4  Pulse Circuits - 741.1.2  Fiber Optics - 744.1  Lasers, General - 744.4  Solid State Lasers
Numerical data indexing:Frequency 2.00E+06Hz, Power 1.32E+08W, Size 2.50E-04m, Size 4.00E-04m, Time 2.66E-13s, Time 3.00E-13s
DOI:10.1364/OE.480637
Funding details:  Number: 2022KJXX-98, Acronym: -, Sponsor: -;Number: 61690222, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: XIOPMQCH2021007, Acronym: YIPA CAS, Sponsor: Youth Innovation Promotion Association of the Chinese Academy of Sciences;Number: -, Acronym: -, Sponsor: CAS-SAFEA International Partnership Program for Creative Research Teams;
Funding text:Funding. Chinese academy of science "light of west China" program (XAB2021YN12); Shaanxi young science and technology star (2022KJXX-98); Key Project of "Double Chain" Integration of Shaanxi Province; National Natural Science Foundation of China (61690222); Youth Innovation Promotion Association of the Chinese Academy of Sciences XIOPM-CAS (XIOPMQCH2021007); CAS-SAFEA International Partnership Program for Creative Research Teams.
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
 
<RECORD 27>
 
Accession number:20230813626027
Title:Air Channel Space-Charge-Limited Transistor
Authors:Shen, Zhihua (1); Li, Qiaoning (1); Wang, Xiao (2); Ge, Bin (1); Wu, Shengli (3); Tian, Jinshou (4) 
Author affiliation:(1) Nantong Vocational University, School of Electronics and Information Engineering, Nantong; 226007, China; (2) Shaanxi University of Science and Technology, School of Electronic Information and Artificial Intelligence, Xi'an; 710049, China; (3) Xi'an Jiaotong University, Key Laboratory for Physical Electronics and Devices of the Ministry of Education, Xi'an; 710049, China; (4) Xi'an Institute of Optics and Precision Mechanics of Cas, State Key Laboratory of Transient Optics and Photonics, Xi'an; 710119, China 
Corresponding author:Wu, Shengli(slwu@mail.xjtu.edu.cn)
Source title:IEEE Transactions on Electron Devices
Abbreviated source title:IEEE Trans. Electron Devices
Volume:70
Issue:4
Issue date:April 1, 2023
Publication year:2023
Pages:1894-1897
Language:English
ISSN:00189383
E-ISSN:15579646
CODEN:IETDAI
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">A vertical structural air channel transistor with a gate block dielectric layer, which can isolate gate from air channel, was proposed. With the presence of gate block dielectric layer, electrons at the edge of the 2-D electron system (2-DES) formed at gate are prevented to be injected into air channel, which may effectively minish the gate leakage current compared to the conventional vertical structure. The transistor operates in the space-charge-limited (SCL) regime of thermionic emission, which makes it theoretically possess the advantages of high-temperature reliability and low power consumption. Simulation results indicate that this transistor can achieve transconductance of 34.2&mu;S and cutoff frequency of 88.2 GHz by optimizing the dimensional parameters.<br/></div> &copy; 1963-2012 IEEE.
Number of references:20
Main heading:Cutoff frequency
Controlled terms:Electric space charge - Leakage currents - Thermionic emission - Transistors
Uncontrolled terms:Air channel transistor high cutoff frequency space-charge-limited current - Air channels - Channel transistors - D electrons - Dielectric layer - Electron systems - Frequency spaces - Gate-leakage current - Space-charge limited - Space-charge-limited current
Classification code:701.1  Electricity: Basic Concepts and Phenomena - 714.2  Semiconductor Devices and Integrated Circuits
Numerical data indexing:Frequency 8.82E+10Hz
DOI:10.1109/TED.2023.3241838
Funding details:  Number: 20KJD510001, Acronym: -, Sponsor: -;Number: 62004108,62004120, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: JC2021036,JCZ2022112, Acronym: -, Sponsor: Science and Technology Project of Nantong City;
Funding text:This work was supported in part by the National Natural Science Foundation of China under Grant 62004108 and Grant 62004120, in part by the Natural Science Foundation for Universities of Jiangsu Province under Grant 20KJD510001, and in part by the Nantong Science and Technology Plan Project under Grant JCZ2022112 and Grant JC2021036.
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 28>
 
Accession number:20230513467399
Title:Compact and high-reliability fiber-optic open-loop gyroscope enabled by an in-fiber polarizer    (Open Access)
Authors:Chen, Lin (1); Mao, Yuzheng (2); He, Peitong (3); Wang, Hushan (4); Jiang, Biqiang (1); Zhao, Jianlin (1) 
Author affiliation:(1) Key Laboratory of Light Field Manipulation and Information Acquisition, Ministry of Industry and Information Technology, Shaanxi Key Laboratory of Optical Information Technology, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an; 710129, China; (2) Xi'an Flight Automatic Control Research Institute, Aviation Industry Corporation of China, Xi'an; 710065, China; (3) Zhejiang Lab, Hangzhou; 311100, China; (4) 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:Jiang, Biqiang(bqjiang@nwpu.edu.cn)
Source title:Optics Express
Abbreviated source title:Opt. Express
Volume:31
Issue:3
Issue date:January 30, 2023
Publication year:2023
Pages:4803-4811
Language:English
E-ISSN:10944087
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">The performance of an open-loop fiber-optic gyroscope is strongly dependent on the optical characteristics of its polarizer. Here we report the implementation of an in-house fabricated 45&deg; tilted-fiber-grating-based polarizer, for the first time on an ultra-fine diameter polarization-maintaining fiber platform in an open-loop fiber-optic gyroscope. This special in-line polarizer is proven to have the merits of high extinction ratio, broad spectrum, bendability, stretchability, temperature insensitivity, and high reliability, all of which make it a perfect match for practical fiber optic gyros that need to be packaged compactly without affecting performance. Our prototype fiber optic gyroscope has a compact volume of only &phi;35 &times; 20 mm2, achieving a bias instability of less than 0.1 &deg;/h, full temperature bias stability of less than 1 &deg;/h, and scale factor linearity of better than 200 ppm. This compact and high-performance fiber gyro enabled by TFG polarizer may promise great potential in the field of automation and control.<br/></div> &copy; 2023 Optica Publishing Group.
Number of references:34
Main heading:Polarization-maintaining fiber
Controlled terms:Fiber optics - Gyroscopes - Optical instruments
Uncontrolled terms:Fiber polarizers - Fiber-optics - Fibre optics gyroscopes - High reliability - In-fiber - Open-loop - Optical characteristics - Performance - Polarisers - Tilted fiber gratings
Classification code:741.1.2  Fiber Optics - 941.3  Optical Instruments
Numerical data indexing:Area 2.00E-05m2
DOI:10.1364/OE.480935
Funding details:  Number: 61975166, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:National Natural Science Foundation of China (61975166).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
 
<RECORD 29>
 
Accession number:20223812778115
Title:Flow and heat transfer for the mist/steam two-phase flow in the U-shaped channel with column-row-ribs and solid ribs
Authors:Jiang, Guangwen (1); Gao, Jianmin (2) 
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of CAS, NO.17 Xinxi Road, New Industrial Park, Xi'an Hi-Tech Industrial Development Zone, Xi'an, Shaanxi; 710119, China; (2) Western China Institute of Quality Science and Technology, Xi'an Jiaotong University, No. 28, Xianning West Road, Shaanxi, Xi'an; 710049, China 
Corresponding author:Jiang, Guangwen(jgw123456@126.com)
Source title:Applied Thermal Engineering
Abbreviated source title:Appl Therm Eng
Volume:218
Issue date:January 5, 2023
Publication year:2023
Article number:119277
Language:English
ISSN:13594311
CODEN:ATENFT
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">The comparison of flow field and heat transfer characteristics for the new mist/steam working fluid inside the U-shaped internal cooling channel of the gas turbine blades roughed with new V-45 deg. Column-Row-Ribs and V-45 deg. solid ribs are conducted under the limited working conditions in this work. First, the secondary flow vortex and droplets distribution in channels with different turbulators were analyzed. Then, qualitative heat transfer comparison of these two different ribbed channels was conducted. Furthermore, the quantitative analysis of heat transfer enhancement and heat transfer uniformity was presented under the condition of different mist/steam mass ratio (mist/steam) and droplets diameter (D<inf>0</inf>). Through the analysis, it is seen that the Mainstream Secondary Flow Vortexes in U-shaped channel roughed with 45&deg; V-shaped Column-Row-Ribs has the similar structure as the channel with 45&deg; V-shaped solid ribs. The droplets have a more even distribution in U-shaped channel roughed with 45&deg; V-shaped Column-Row-Ribs than channel with 45&deg; V-shaped solid ribs. And the new Column-Row-Ribs will help to solve the problem that the droplets deposit at the windward side of the solid ribbed channel, which benefits to promote the heat transfer evenness of the heated wall. The results proved that the U-shaped channel with 45&deg; V-shaped Column-Row-Ribs cooled with the mist-steam coolant has better heat transfer characteristics than the 45&deg; V-shaped solid ribs. For the U-shaped channel, there exists a best droplet diameter which can achieve the highest heat transfer enhancement.<br/></div> &copy; 2022 Elsevier Ltd
Number of references:54
Main heading:Two phase flow
Controlled terms:Drops - Gas turbines - Heat transfer coefficients - Secondary flow - Turbine components - Turbomachine blades - Vortex flow
Uncontrolled terms:Column-row-rib - Condition - Gas turbine blades - Heat-transfer characteristics - Mist/steam two-phase flow - Shaped columns - Two phases flow - U-shaped - U-shaped channels - U-shaped passage
Classification code:612.3  Gas Turbines and Engines - 617  Turbines and Steam Turbines - 631.1  Fluid Flow, General - 641.2  Heat Transfer
DOI:10.1016/j.applthermaleng.2022.119277
Funding details:  Number: 51276136, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This work was supported by the National Natural Science Foundation of China [ 51276136 ].
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 30>
 
Accession number:20231914068543
Title:Analysis of Sensing Characteristics of Parallel Fabry-P&eacute;rot Interferometer Based on Vernier Effect
Title of translation:&#22522; &#20110; &#28216; &#26631; &#25928; &#24212; &#30340; &#24182; &#32852; &#27861; &#24067; &#37324; -&#29632; &#32599; &#24178; &#28041; &#20202;&#20256; &#24863; &#29305; &#24615; &#30340; &#20998; &#26512;
Authors:Luo, Chunhui (1); Chen, Xiaoxu (1); Wu, Shun (1, 2) 
Author affiliation:(1) Hubei Key Laboratory of Optical information and Pattern Recognition, Wuhan Institute of Technology, Hubei, Wuhan; 430205, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shaanxi, Xi'an; 710119, China 
Corresponding author:Wu, Shun(Wushun_wit@163.com)
Source title:Guangxue Xuebao/Acta Optica Sinica
Abbreviated source title:Guangxue Xuebao
Volume:43
Issue:5
Issue date:March 2023
Publication year:2023
Article number:0506002
Language:Chinese
ISSN:02532239
CODEN:GUXUDC
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">Objective Optical fiber sensor technology has been extensively applied in gas pressure sensing in the field of industrial and environmental safety monitoring on account of its high sensitivity, compact structure, and immunity to electromagnetic interference. Compared with long-period fiber gratings and anti-resonance waveguides, optical fiber sensors based on the vernier effect generally have greater advantages in terms of sensitivity. The vernier effect is an effective method for amplifying interferometer sensitivity, which is well-known in optical fiber sensing. However, as the harmonic order j increases, vernier spectra deteriorate, namely that the contrast of the external envelope decreases, and the inner envelope disappears. The objective of this work is to generalize the higher-order vernier effect and obtain high sensitivity through experimental exploration and theoretical analysis. In addition, we intend to explore the reasons for the decrease in external envelope contrast and the loss of internal envelopes that affect spectral contrast. We expect to contribute to the extensive application of the high-order harmonic vernier effect and high-sensitivity sensor design. Methods Firstly, we theoretically simulate the higher-order vernier spectrum for j=1, 2, 3, 4. Then, we fabricate four parallel structures of the Fabry-P&eacute;rot interferometers experimentally and study the corresponding vernier spectra. After that, we investigate the effect of the difference in light intensity between the sensing cavity and the reference cavity on the vernier spectrum by changing the light intensity difference between the two cavities. In addition, we analyze various parameters that affect the vernier magnification factor and design a highly sensitive fiber-based gas pressure sensor. Results and Discussions On the basis of a parallel Fabry-P&eacute;rot interferometer, this paper compares the theoretical simulations (Fig. 2) and the experimental results (Fig. 3) of vernier spectra for j=1, 2, 3, 4. The comparison shows that they are consistent, which indicates the vernier effect is valid in the experiment. After that, we simulate the spectra corresponding to different light intensities of the sensing cavity and the reference cavity. It is found that with the increase in the light intensity difference between the two cavities, the contrast of the external envelope decreases, and the internal envelope disappears (Fig. 5). Then, we fundamentally explain the deterioration of the vernier spectrum when the higher-order harmonic vernier effect is applied in the experiment (Fig. 6). In addition, the factors affecting the vernier magnification are discussed from the aspects of a higher value of j and a lower detuning ratio. After that, we put forward reasonable suggestions for obtaining higher magnification when applying the vernier effect in gas pressure sensing. Furthermore, a sample corresponding to the first-order harmonic vernier effect is produced for the gas pressure test. At room temperature, it enjoys gas pressure sensitivity of 152 pm/kPa, a corresponding magnification factor of 35.3, and linearity of 99% in the range of 10-190 kPa (Fig. 4). Conclusions This paper studies the higher-order harmonic vernier effect and proposes a method to improve the interference fringe contrast for the external vernier envelope, which is verified by experiments. The reason for the reduction in the vernier spectrum contrast is the reduction in the imbalance of light intensity between the sensing and the reference cavities. The application demonstrates that with the increase in the light intensity difference between the two cavities, the vernier spectrum becomes more susceptible to the quality or noise of the light source. This leads to weaker visibility of the envelope for higher harmonic orders. In addition, we analyze various experimental parameters so as to obtain high sensitivity and demonstrate a parallel Fabry-P&eacute;rot interferometer with gas pressure sensitivity of 152 pm/kPa, linearity of 99%, and a magnification factor of 35. 3 in the range of 10-190 kPa.<br/></div> &copy; 2023 Chinese Optical Society. All rights reserved.
Number of references:28
Main heading:Accident prevention
Controlled terms:Deterioration - Diffraction gratings - Electromagnetic pulse - Fabry-Perot interferometers - Fiber optic sensors - Harmonic analysis - Optical fiber fabrication - Optical fibers
Uncontrolled terms:Gas pressures - High order harmonics - High sensitivity - Higher order harmonics - Intensity difference - Light intensity - Magnification factors - Spectra's - Two-cavity - Vernier effect
Classification code:701  Electricity and Magnetism - 741.1.2  Fiber Optics - 741.3  Optical Devices and Systems - 914.1  Accidents and Accident Prevention - 921.6  Numerical Methods - 941.3  Optical Instruments - 951  Materials Science
Numerical data indexing:Percentage 9.90E+01%, Pressure 1.00E+04Pa to 1.90E+05Pa, Size 1.52E-10m, Size 7.62E-02m
DOI:10.3788/AOS221550
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 31>
 
Accession number:20231914075718
Title:Calibration of spatially modulated snapshot imaging polarimeter based on phase-shift interferometry
Authors:Tang, Jinfeng (1); Jia, Chenling (2); Zhang, Jin (1); Jiang, Ming (1); Pan, Yangliu (1); Jiang, Siyue (1); Hu, Baoqing (3); Cao, Qizhi (1, 4); Jin, Mingwu (5) 
Author affiliation:(1) School of Physics and Electronics, Nanning Normal University, Nanning; 530023, China; (2) China (Xi'an) Institute for Silk Road Research, Xi'an University of Finance and Economics, Xi'an; 710100, China; (3) Key Laboratory of Environment Change and Resources Use in Beibu Gulf, Nanning Normal University, Nanning; 530023, China; (4) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (5) Department of Physics, University of Texas at Arlington, Arlington; TX; 76019, United States 
Corresponding author:Hu, Baoqing(hbq1230@nnnu.edu.cn)
Source title:Applied Optics
Abbreviated source title:Appl. Opt.
Volume:62
Issue:12
Issue date:April 20, 2023
Publication year:2023
Pages:3142-3148
Language:English
ISSN:1559128X
E-ISSN:21553165
CODEN:APOPAI
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">The snapshot imaging polarimeters (SIPs) using spatial modulation have gained increasing popularity due to their capability of obtaining all four Stokes parameters in a single measurement. However, the existing reference beam calibration techniques cannot extract the modulation phase factors of the spatially modulated system. In this paper, a calibration technique based on a phase-shift interference (PSI) theory is proposed to address this issue. The proposed technique can accurately extract and demodulate the modulation phase factors through measuring the reference object at different polarization analyzer orientations and performing a PSI algorithm. Using the snapshot imaging polarimeter with modified Savart polariscopes as an example, the basic principle of the proposed technique is analyzed in detail. Subsequently, the feasibility of this calibration technique was demonstrated by a numerical simulation and a laboratory experiment. This work provides a different perspective for the calibration of a spatially modulated snapshot imaging polarimeter.<br/></div> &copy; 2023 Optica Publishing Group.
Number of references:19
Main heading:Calibration
Controlled terms:Interferometry - Polarimeters
Uncontrolled terms:Calibration techniques - Four Stokes parameters - Imaging Polarimeter - Interference theory - Modulated systems - Phase factor - Phase shift interferometry - Reference beams - Spatial modulations - Spatially modulated
Classification code:941.3  Optical Instruments - 941.4  Optical Variables Measurements
DOI:10.1364/AO.483989
Funding details:  Number: AD19110142, Acronym: -, Sponsor: -;Number: SKLST202220, Acronym: -, Sponsor: -;Number: GTEU-KLOP-K1801, Acronym: NNU, Sponsor: Nanjing Normal University;Number: 11664004,11964021,41930537,41961062,42071135,U21A2022, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: MOE, Sponsor: Ministry of Education;
Funding text:Funding. National Natural Science Foundation of China (11964021, 11664004, 41961062, 42071135, U21A2022, 41930537); State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences (SKLST202220); Key Laboratory of Environment Change and Resources Use in Beibu Gulf, Ministry of Education (Nanning Normal University) (GTEU-KLOP-K1801); The Science and Technology Foundation of Guangxi (Grant No. AD19110142).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 32>
 
Accession number:20230213380160
Title:A label-free biosensor for pepsin detection based on graphene oxide functionalized micro-tapered long period fiber grating    (Open Access)
Authors:Kang, Xin (1, 2); Wang, Ruiduo (1); Jiang, Man (2); Li, Erkang (2); Li, Yarong (2); Wang, Tianqi (2); Ren, Zhaoyu (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) State Key Laboratory of Photon-Technology in Western China Energy, International Collaborative Center on Photoelectric Technology and Nano Functional Materials, School of Physics, Institute of Photonics & Photon Technology, Northwest University, Xi'an; 710069, China 
Corresponding author:Wang, Ruiduo(wangruiduo@opt.ac.cn)
Source title:Sensors and Actuators Reports
Abbreviated source title:Sens. Actuators. Reports.
Volume:5
Issue date:June 2023
Publication year:2023
Article number:100139
Language:English
E-ISSN:26660539
Document type:Journal article (JA)
Publisher:Elsevier B.V.
Abstract:<div data-language="eng" data-ev-field="abstract">The rapid and sensitive detection of pepsin plays an important role in clinical and medical practice. A label-free and sensitive micro-tapered long-period fiber grating (MTLPFG) sensor that functionalized by graphene oxide (GO) was proposed for pepsin detection. MTLPFG was fabricated with CO<inf>2</inf> laser heating and tapered to form a series of periods, and the GO that activated oxygen groups by EDC/NHS was deposited onto MTLPFG surface. On account of large specific surface area and oxygen containing groups of GO, the biomolecules can be adsorbed on the GO surface through amide groups and &pi;-&pi; stacking. The spectrum variation trend during sensing process obeys Langmuir absorption mode, which illustrates biomolecule adsorption on GO layer. The bare MTLPFG and GO-MTLPFG separately demonstrate the limit of detection (LOD) of 104.6 ng/ml and 25.79 ng/ml, which corresponding to the effectively detection range of 1&ndash;1000 ng/ml. Combination of GO and optical fibers exhibit great adaptive capacity to the biosensors, and provides inspirations for biochemical sensing applications.<br/></div> &copy; 2023 The Authors
Number of references:48
Main heading:Graphene
Controlled terms:Absorption spectroscopy - Amides - Biomolecules - Biosensors - Carbon dioxide lasers - Diffraction gratings - Optical fiber fabrication - Optical fibers - Oxygen
Uncontrolled terms:Absorption model - Biomolecule detection - Dynamic absorption - Dynamic absorption model - Functionalized - Graphene oxides - Label-free biosensor - Long-period fibre gratings - Rapid detection - Sensitive detection
Classification code:461.9  Biology - 741.1.2  Fiber Optics - 741.3  Optical Devices and Systems - 744.2  Gas Lasers - 761  Nanotechnology - 801.2  Biochemistry - 804  Chemical Products Generally - 804.1  Organic Compounds
Numerical data indexing:Mass density 1.00E-06kg/m3 to 1.00E-03kg/m3, Mass density 1.046E-04kg/m3, Mass density 2.579E-05kg/m3
DOI:10.1016/j.snr.2023.100139
Funding details:  Number: 2014DFR10780,61505162,61905193, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2021JM316, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;
Funding text:This work is supported by the Natural Science Basic Research Plan in Shaanxi Province of China (No. 2021JM316 ), National Science Foundation of China (Nos. 61505162 and 61905193 ), and International Cooperative Program (Grant No. 2014DFR10780 ).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
 
<RECORD 33>
 
Accession number:20230613539853
Title:Femtosecond laser-induced refractive index change and phase-type Fresnel zone plate in fluorotellurite glass
Authors:Li, Xianda (1, 2); Liu, Feng (3); Wan, Rui (1, 2); Li, Weinan (1); Wang, Pengfei (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) Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Shaanxi Key Laboratory of Optical Information Technology, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an; 710129, China 
Corresponding author:Wang, Pengfei(pfwang@opt.ac.cn)
Source title:Optics and Laser Technology
Abbreviated source title:Opt Laser Technol
Volume:161
Issue date:June 2023
Publication year:2023
Article number:109216
Language:English
ISSN:00303992
CODEN:OLTCAS
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">We report a phase-type Fresnel zone plate (FZP) fabricated by femtosecond (fs) laser-induced refractive index change (RIC), which was embedded in a newly developed fluorotellurite glass. The effect of laser direct-writing parameters on the morphology of the laser-induced structures was studied and negative RIC was observed. A maximum RIC of 4.42&times;10<sup>-3</sup> was achieved at laser inscription energy of 0.13 &micro;J. Additionally, structure change from TeO<inf>4</inf> units to TeO<inf>3</inf><sup>-</sup> units triggered by fs laser irradiation is verified by Raman spectra measurements for the first time, to the best of our knowledge, and demonstrated to be a vital factor for the negative RIC. On this basis, we firstly fabricated a two-level phase-type FZP designed to work at 1340 nm inside such fluorotellurite glass. The phase-type FZP exhibits strong IR beam focusing and excellent imaging capabilities with a resolution of 128 line pairs per millimeter (lp/mm). This study reveals the facts that such novel fluorotellurite glass has good processibility with fs laser direct writing and made it a potential alternative material for micro-optics in NIR applications.<br/></div> &copy; 2023 Elsevier Ltd
Number of references:42
Main heading:Femtosecond lasers
Controlled terms:Glass - Optical waveguides - Plates (structural components) - Refractive index - Tellurium compounds
Uncontrolled terms:Energy - Femtosecond laser direct writing - Fluoro-tellurite glass - Fresnel zone plate - Laser direct writing - Laser direct-writing - Laser induced refractive index - Laser-induced structures - Negative refractive index - Refractive index changes
Classification code:408.2  Structural Members and Shapes - 714.3  Waveguides - 741.1  Light/Optics - 741.3  Optical Devices and Systems - 744.1  Lasers, General - 812.3  Glass
Numerical data indexing:Size 1.34E-06m
DOI:10.1016/j.optlastec.2023.109216
Funding details:  Number: 52127817, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: ZDKYYQ20220007,ZDRW-XH-2021-6, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 2017446, Acronym: YIPA CAS, Sponsor: Youth Innovation Promotion Association of the Chinese Academy of Sciences;Number: 310202011QD005, Acronym: -, Sponsor: Fundamental Research Funds for the Central Universities;Number: 2021GY-251, Acronym: -, Sponsor: Shanxi Provincial Key Research and Development Project;
Funding text:The work is financially supported by Shaanxi Provincial Key Research and Development Program (2021GY-251), Youth Innovation Promotion Association, CAS (2017446), Major scientific research instrument development project of National Natural Science Foundation of China (Grant No. 52127817 ), Key deployment projects of Chinese Academy of Sciences ( ZDRW-XH-2021-6 ), Research and development project of scientific research instruments and equipment of Chinese Academy of Sciences (Grant No. ZDKYYQ20220007 ), Fundamental Research Funds for the Central Universities ( 310202011QD005 ).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 34>
 
Accession number:20232114130599
Title:Photoelectric characteristics of different micro structures of black silicon etched by femtosecond laser
Authors:Zhang, Xiaomo (1, 2); Zhu, Xiangping (1, 2); Liu, Yang (1, 2); Zhao, Wei (1, 2); Jin, Chuan (1, 2); Zhang, Pu (1, 2) 
Author affiliation:(1) Key & Core Technology Innovation Institute of the Greater Bay Area, Building B3, No.11 kaiyuan Avenue, Huangpu District, Guangdong, Guangzhou; 510535, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Industrial Development Zone, Shaanxi, Xi'an; 710119, China 
Corresponding author:Zhu, Xiangping(xpzhu@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12617
Part number:1 of 1
Issue title:Ninth Symposium on Novel Photoelectronic Detection Technology and Applications
Issue date:2023
Publication year:2023
Article number:126170S
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510664432
Document type:Conference article (CA)
Conference name:9th Symposium on Novel Photoelectronic Detection Technology and Applications
Conference date:April 21, 2023  -  April 23, 2023
Conference location:Hefei, China
Conference code:188142
Sponsor:Chinese Society for Optical Engineering; Science and Technology on Low-light-level Night Vision Laboratory
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">Black silicon, which is characterized as numerous nanospikes induced on bulk silicon, has recently attracted great attention due to its fascinating photoelectric property. Compared with the traditional silicon-based photoelectric sensor, photoelectric sensors based on the black silicon doped with supersaturated chalcogens have shown both excellent photoelectric corresponding efficiency in the visible range and considerable optical absorption efficiency in the near-infrared band due to the impurity energy-level introduced by the chalcogens element supersaturated doping. Nonetheless, the differences of surface morphology greatly affect the photoelectric efficiency of black silicon photoelectric sensors, which is quite difficult to control in practice. As one of the mainstream methods in black silicon fabrication, femtosecond laser etching exhibits the ability in manipulate different dimensionality and configurations, and provide a clear and flexible research platform. Black silicon can be etched on traditional silicon-based photoelectric sensor with different size of surface morphology according to the size of surface thickness. In this work, by varying the etching energy density of the femtosecond laser, three kinds of black silicon samples with different surface morphology were obtained. At the same time, the surface morphology, size, visible-infrared absorptivity and photoelectric conversion efficiency of black silicon were characterized by scanning electron microscope, spectrophotometer and confocal Raman spectroscopy, etc. We got three sample characterization data, the minimum morphology depth of black silicon can be controlled at 2 &mu;m, the maximum visible light absorption efficiency can reach 90%, and the near-infrared absorption efficiency can reach 60% before annealing. Naturally, the photoelectric conversion efficiency has been proven to be significantly improved. Based on the observation of experimental results, it is an important step to understand the photoelectric characteristic of black silicon with different morphologies, which is the application of black silicon in different fields.<br/></div> &copy; 2023 SPIE.
Number of references:15
Main heading:Surface morphology
Controlled terms:Conversion efficiency - Etching - Femtosecond lasers - Infrared devices - Light absorption - Morphology - Photoelectricity - Scanning electron microscopy - Silicon
Uncontrolled terms:Absorption efficiency - Black silicon - Fs laser - Fs-laser etching - Laser etching - Photo-electric conversion efficiency - Photoelectric characteristics - Photoelectric sensors - Silicon-based - Supersaturated doping
Classification code:525.5  Energy Conversion Issues - 549.3  Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 701.1  Electricity: Basic Concepts and Phenomena - 741.1  Light/Optics - 744.1  Lasers, General - 802.2  Chemical Reactions - 931.2  Physical Properties of Gases, Liquids and Solids - 951  Materials Science
Numerical data indexing:Percentage 6.00E+01%, Percentage 9.00E+01%, Size 2.00E-06m
DOI:10.1117/12.2663330
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 35>
 
Accession number:20231013661870
Title:Phase-type diffractive micro-optics elements in sulfur-based polymeric glass by femtosecond laser direct writing
Authors:Liu, Feng (1); Li, Peng (1); Liu, Sheng (1); Jin, Chuan (2); Wei, Bingyan (1); Min, Junwei (2); Liu, Zhichao (2); Zhu, Xiangping (2); Zhao, Jianlin (1) 
Author affiliation:(1) Key Laboratory of Light-Field Manipulation and Information Acquisition, Ministry of Industry and Information Technology, Shaanxi Key Laboratory of Optical Information Technology, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an; 710129, 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:Zhao, Jianlin(jlzhao@nwpu.edu.cn)
Source title:Optics Letters
Abbreviated source title:Opt. Lett.
Volume:48
Issue:4
Issue date:February 15, 2023
Publication year:2023
Pages:1056-1059
Language:English
ISSN:01469592
E-ISSN:15394794
CODEN:OPLEDP
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">Sulfur-based polymeric glasses are promising alternative low-cost IR materials due to their profoundly high IR transparency. In this Letter, femtosecond-laser-induced refractive index change (RIC) was investigated in one typical sulfurbased polymeric glass material, poly(S-r-DIB), for the first time, to the best of our knowledge. The RIC in the laserengineered region was quantitively characterized, which laid a foundation for phase-type optical element design. By the integration of RIC traces, embedded phase-type micro-optics elements, including Fresnel zone plates, and a Dammann grating were fabricated in bulk poly(S-r-DIB) polymeric glass substrate via the femtosecond laser direct writing technique. The imaging and beam shaping performance were demoed in the near-infrared (NIR) region.<br/></div> &copy; 2023 Optica Publishing Group.
Number of references:19
Main heading:Femtosecond lasers
Controlled terms:Glass - Glass substrates - Infrared devices - Optical waveguides - Refractive index - Sulfur
Uncontrolled terms:Element design - Glass materials - IR materials - IR transparency - Laser direct writing - Laser direct-writing - Laser induced refractive index - Low-costs - Micro-optic elements - Refractive index changes
Classification code:714.3  Waveguides - 741.1  Light/Optics - 741.3  Optical Devices and Systems - 744.1  Lasers, General - 804  Chemical Products Generally - 812.3  Glass - 813.2  Coating Materials
DOI:10.1364/OL.483654
Funding details:  Number: ZDKYYQ20220007, Acronym: -, Sponsor: -;Number: 11634010,12074312,12074313,12174309,52127817,61975233, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: ZDRW-XH-2021-6, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 2017YFA0303800, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;Number: 310202011QD005, Acronym: -, Sponsor: Fundamental Research Funds for the Central Universities;
Funding text:Funding. National Key Research and Development Program of China (2017YFA0303800); National Natural Science Foundation of China (11634010, 12074312, 12074313, 12174309, 52127817, 61975233); Fundamental Research Funds for the Central Universities (310202011QD005); Scientific Instrument Developing Project of the Chinese Academy of Sciences (ZDKYYQ20220007); Key Research Program of the Chinese Academy of Sciences (ZDRW-XH-2021-6).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 36>
 
Accession number:20224513072792
Title:Research on fretting regime transition of DD6 single- crystal superalloy via femtosecond laser-induced asperity and hardened layer
Authors:Yu, Yanqing (1); Zhou, Liucheng (2); Li, Ming (3); Cai, Zhenbing (1); Luo, Sihai (2); He, Weifeng (2); Fang, Xiuyang (4) 
Author affiliation:(1) Tribology Research Institute, Key Lab of Advanced Technologies of Materials, Southwest Jiaotong University, Chengdu; 610031, China; (2) Science and Technology on Plasma Dynamic Laboratory, Air Force Engineering University, Xi'an; 710038, China; (3) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an; 710119, China; (4) School of Mechanical Engineering, Southwest Jiaotong University, Chengdu; 610031, China 
Corresponding author:Zhou, Liucheng(happyzlch@163.com)
Source title:Applied Surface Science
Abbreviated source title:Appl Surf Sci
Volume:610
Issue date:February 1, 2023
Publication year:2023
Article number:155392
Language:English
ISSN:01694332
CODEN:ASUSEE
Document type:Journal article (JA)
Publisher:Elsevier B.V.
Abstract:<div data-language="eng" data-ev-field="abstract">In this study, the fretting wear test was performed on DD6 single-crystal superalloy after femtosecond laser modification (FLM) to evaluate the influence of femtosecond laser-induced asperity and hardened layer on its fretting regime. Results show that the ablation layer with a depth of &sim; 3.2 &mu;m and the deformed layer are formed beneath the surface, with an increase in surface roughness and hardness. The ablation layer is composed of Al<inf>2</inf>O<inf>3</inf>, Cr<inf>2</inf>O<inf>3</inf>, and spinel structures. However, the diffraction peak and near-surface orientation after FLM remain similar to those in DD6 single-crystal superalloy substrate, indicating that no remarkable phase change and recrystallization occur despite thermal effect during FLM. The hardened layer has lower plasticity, and the asperities are easy to remove, which results in material removal predominating during the friction process. Therefore, the asperity and hardened layer induced by femtosecond laser could change the fretting regime of DD6 single-crystal superalloy from mixed slip regime (MSR) to gross slip regime (GSR). FLM provides a possibility to replace crack initiation with acceptable material removal in special conditions.<br/></div> &copy; 2022 Elsevier B.V.
Number of references:52
Main heading:Femtosecond lasers
Controlled terms:Ablation - Alumina - Aluminum oxide - Crystal orientation - Hardening - Sapphire - Single crystals - Superalloys - Surface roughness
Uncontrolled terms:DD6 single-crystal superalloy - Femtosecond laser modification - Fretting regime transition - Gradient microstructure - Hardened layers - Laser induced - Material removal - Regime transition - Single crystal superalloys - Slip regime
Classification code:482.2.1  Gems - 531  Metallurgy and Metallography - 537.1  Heat Treatment Processes - 641.2  Heat Transfer - 744.1  Lasers, General - 804.2  Inorganic Compounds - 931.2  Physical Properties of Gases, Liquids and Solids - 933.1  Crystalline Solids - 933.1.1  Crystal Lattice
Numerical data indexing:Size 3.20E-06m
DOI:10.1016/j.apsusc.2022.155392
Funding details:  Number: 2022JDJQ0019, Acronym: -, Sponsor: -;Number: 51875574, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 20200321, Acronym: CAST, Sponsor: China Academy of Space Technology;Number: 2017-VII-0003-0096-1, Acronym: -, Sponsor: National Major Science and Technology Projects of China;Number: 2018B090906002, Acronym: -, Sponsor: Special Project for Research and Development in Key areas of Guangdong Province;
Funding text:This work was financially supported by National Science and Technology Major Project of China (No. 2017-VII-0003-0096-1), National Natural Science Foundation of China (No. 51875574), Key-Area Research and Development Program of Guangdong Province (No. 2018B090906002), Young Elite Scientist Sponsorship Program by CAST (No. 20200321), and Sichuan Science and Technology Planning Project (No. 2022JDJQ0019).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 37>
 
Accession number:20230613555964
Title:High-damage vanadium pentoxide film saturable absorber for sub-nanosecond Nd:YAG lasers
Authors:Wang, Jiang (1, 4); Xie, Liang (1); Wang, Yunheng (2); Lan, Yu (3); Wu, Pengfei (1); Lv, Jing (1); Zhang, Guodong (1); Miao, Zongcheng (1); Cheng, Guanghua (1) 
Author affiliation:(1) School of Artificial intelligence, Optics and Electronics (iOPEN), Northwestern Polytechnical University, Xi'an; 710072, China; (2) Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing; 100094, 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) Research & Development Institute of Northwestern Polytechnical University in Shenzhen, Shenzhen; 518057, China 
Corresponding author:Cheng, Guanghua(guanghuacheng@nwpu.edu.cn)
Source title:Infrared Physics and Technology
Abbreviated source title:Infrared Phys Technol
Volume:129
Issue date:March 2023
Publication year:2023
Article number:104580
Language:English
ISSN:13504495
CODEN:IPTEEY
Document type:Journal article (JA)
Publisher:Elsevier B.V.
Abstract:<div data-language="eng" data-ev-field="abstract">Low-dimensional materials as saturable absorber (SA) for sub-nanosecond pulse laser have attracted extensive attention due to their excellent optoelectronic properties. However, high-quality low-dimensional materials&rsquo; nonlinear optical properties, such as larger damage threshold and higher modulation depth, are essential for generation of stable sub-nanosecond pulse laser. Herein, the large-area high-quality vanadium pentoxide (V<inf>2</inf>O<inf>5</inf>) films were prepared by magnetron sputtering deposition technology, and the usage of V<inf>2</inf>O<inf>5</inf> films as a SA for sub-nanosecond pulse passively Q-switched Nd:YAG laser generation for the first time. It was found that V<inf>2</inf>O<inf>5</inf>-SA films exhibit excellent nonlinear optical characteristics, with a larger damage threshold of 509.8 mJ/cm<sup>2</sup> and a higher modulation depth of 21.8 %, and the shortest pulse width of 59 ns. Our experimental results demonstrate that V<inf>2</inf>O<inf>5</inf>-SA films has the advantages of larger damage threshold and stable availability, which provides a promising solution for the development of high-quality low-dimensional SA devices in short pulse solid-state lasers.<br/></div> &copy; 2023 Elsevier B.V.
Number of references:37
Main heading:Nonlinear optics
Controlled terms:Neodymium lasers - Optical properties - Q switched lasers - Q switching - Saturable absorbers - Vanadium pentoxide - Yttrium aluminum garnet
Uncontrolled terms:Absorber films - Damage threshold - High quality - Low-dimensional materials - Modulation depth - Nanosecond pulse lasers - Q-switched lasers - Sub-nanosecond pulse - Vanadium pentoxide - Vanadium pentoxide film
Classification code:741.1  Light/Optics - 741.1.1  Nonlinear Optics - 744.1  Lasers, General - 744.4  Solid State Lasers - 744.8  Laser Beam Interactions - 804.2  Inorganic Compounds
Numerical data indexing:Energy 5.098E-01J, Percentage 2.18E+01%, Time 5.90E-08s
DOI:10.1016/j.infrared.2023.104580
Funding details:  Number: 2022JQ-013, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;Number: 2020A1515111030, Acronym: -, Sponsor: Basic and Applied Basic Research Foundation of Guangdong Province;
Funding text:This project was supported by the Guangdong Basic and Applied Research Foundation (2020A1515111030), the Nature Science Foundation of Shaanxi Province, China (2022JQ-013).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 38>
 
Accession number:20230213367034
Title:All-fiber acetylene-referenced optical frequency comb
Authors:Li, Yongqi (1); Hu, Xiaohong (2); Cheng, Haihao (2); Wang, Yishan (2); Yang, Yanzhao (3); Wu, Shun (1) 
Author affiliation:(1) Hubei Key Laboratory of Optical Information and Pattern Recognition, Wuhan Institute of Technology, Wuhan; 430205, 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) China Electronics Technology Group 41st Research Institute, Qingdao; 266555, China 
Corresponding author:Wu, Shun(wushun@wit.edu.cn)
Source title:Optics Communications
Abbreviated source title:Opt Commun
Volume:531
Issue date:March 15, 2023
Publication year:2023
Article number:129233
Language:English
ISSN:00304018
CODEN:OPCOB8
Document type:Journal article (JA)
Publisher:Elsevier B.V.
Abstract:<div data-language="eng" data-ev-field="abstract">We demonstrated an all-fiber compact Erbium-doped optical frequency comb based on optical reference. Compared with the traditional RF reference, the whole system adopts the all-fiber design of optical reference. Comb stabilization is achieved by simultaneously locking the repetition rate (f<inf>r</inf>) to an RF reference and an optical comb tooth to a CW reference. The standard deviation of the f<inf>r</inf> frequency in 4.5 hours was recorded as 0.37 mHz, leading to a fraction instability of 4.3 &times;10<sup>&minus;12</sup> at 1 s gate time and 2.8 &times;10<sup>&minus;13</sup> at 10 s gate time. The locking of single comb tooth is achieved by locking the optical comb and the beat note of the CW laser. We used the P(16) overtone transition line of <sup>13</sup>C<inf>2</inf>H<inf>2</inf> as the CW reference and optimized the stabilization by choosing appropriate lock point on the Doppler-limited absorption transition. The comb was able to achieve stable locking for almost five hours. The short-term fraction instability of the optical frequency was measured to be 6.56 &times;10<sup>&minus;10</sup> at 1 s gate time, which is mostly from the CW reference. Our approach of acetylene-stabilized fiber comb offers a feasible solution to help fiber combs move from laboratory to outdoors applications based on fiber sensing, laser stabilization and spectrum analysis.<br/></div> &copy; 2022 Elsevier B.V.
Number of references:37
Main heading:Stabilization
Controlled terms:Acetylene - Continuous wave lasers - Fibers - Locks (fasteners) - Natural frequencies - Optical materials - Spectrum analysis
Uncontrolled terms:All fiber - Fiber compacts - Frequency stabilization - Mode-locked - Mode-locked fiber - Optical combs - Optical frequency combs - Optical reference - Optical- - Optical-frequency combs
Classification code:741.3  Optical Devices and Systems - 744.1  Lasers, General - 804.1  Organic Compounds
Numerical data indexing:Frequency 3.70E-04Hz, Inductance 2.00E+00H, Time 1.00E+01s, Time 1.00E00s, Time 1.62E+04s
DOI:10.1016/j.optcom.2022.129233
Funding details:  Number: 22QD01, Acronym: -, Sponsor: -;Number: CX2021385, Acronym: -, Sponsor: -;Number: SKLST202105, Acronym: -, Sponsor: -;
Funding text:This work is supported by grants from Campus Science Foundation of Wuhan Institute of Technology, China [ 22QD01 ], and Open Research Fund of State Key Laboratory of Transient Optics and Photonics, China [ SKLST202105 ], and Graduate Innovative Fund of Wuhan Institute of Technology, China [NO. CX2021385 ].
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 39>
 
Accession number:20231914077042
Title:3-D Imaging Lidar Based on Miniaturized Streak Tube    (Open Access)
Authors:Tian, Liping (1, 2); Shen, Lingbin (1); Xue, Yanhua (2); Chen, Lin (1); Chen, Ping (2); Tian, Jinshou (2); Zhao, Wei (2) 
Author affiliation:(1) School of Network and Communication Engineering, Jinlin Institute of Technology, Hongjing Road, No.99, Nanjing; 211169, China; (2) Key Laboratory of Transient Optics and Photonics, Key Laboratory of Ultra-fast Photoelectric Diagnostics Technology, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xinxi Road, No.17, Xi'an; 710119, China 
Corresponding author:Shen, Lingbin(shen@jit.edu.cn)
Source title:Measurement Science Review
Abbreviated source title:Meas. Sci. Rev.
Volume:23
Issue:2
Issue date:April 1, 2023
Publication year:2023
Pages:80-85
Language:English
E-ISSN:13358871
Document type:Journal article (JA)
Publisher:Sciendo
Abstract:<div data-language="eng" data-ev-field="abstract">Streak Tube Imaging Lidar (STIL), with advantages of non-scanning working mode, small distortion, high image framing rate, high resolution in low contrast environment, compact structure, easy miniaturization and high reliability, has a wide range of applications in military, aerospace, space confrontation, attack and defense, and marine law enforcement. This article introduces the principle of single-slit and multi-slit streak tube imaging lidar. It also introduces a single-slit general streak camera that can be used for imaging lidar. In addition, a multi-slit miniaturized streak tube with a single-lens focusing system with a total length of about 200 mm has been designed. The results of the 3D electromagnetic simulation show that the effective photocathode area of this streak tube reaches 36 mm &times; 36 mm, the temporal resolution is better than 50 ps, the dynamic spatial resolution can reach 12 lp/mm, and the whole photocathode can accommodate at least 19 slits in the effective detection range. The streak tube has a meshless structure, which is highly reliable. The streak tube can be used to increase the field of view of the imaging lidar system, improve the reliability, and achieve system miniaturization.<br/></div> &copy; 2023 Liping Tian et al., published by Sciendo.
Number of references:24
Main heading:Military applications
Controlled terms:Electromagnetic simulation - Marine applications - Optical radar - Tubes (components)
Uncontrolled terms:Imaging lidar - Miniaturisation - Multi-slit streak tube - Non-scanning - Single slit - Slit streak tubes - Streak tube imaging lidar - Streak tube imaging lidars - Streak tubes - Working mode
Classification code:404.1  Military Engineering - 619.1  Pipe, Piping and Pipelines - 701.1  Electricity: Basic Concepts and Phenomena - 716.2  Radar Systems and Equipment - 741.3  Optical Devices and Systems
Numerical data indexing:Size 2.00E-01m, Size 3.60E-02m, Time 5.00E-11s
DOI:10.2478/msr-2023-0010
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
 
<RECORD 40>
 
Accession number:20224413020441
Title:Compact, repetition rate locked all-PM fiber femtosecond laser system based on low noise figure-9 Er:fiber laser
Authors:Cheng, Haihao (1, 2); Zhang, Zhao (1, 2); Pan, Ran (1, 2); Zhang, Ting (1, 2); Feng, Ye (1); Hu, Xiaohong (1); Wang, Yishan (1, 2); Wu, Shun (1, 3) 
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing; 100049, China; (3) Hubei Key Laboratory of Optical Information and Pattern Recognition, Wuhan Institute of Technology, Wuhan; 430205, China 
Corresponding author:Hu, Xiaohong(xhhu@opt.ac.cn)
Source title:Optics and Laser Technology
Abbreviated source title:Opt Laser Technol
Volume:158
Issue date:February 2023
Publication year:2023
Article number:108818
Language:English
ISSN:00303992
CODEN:OLTCAS
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">We demonstrate a compact femtosecond fiber laser system based on all polarization-maintaining (PM) fiber and fiber components integrated structure. The figure-9 oscillator which incorporated a nonlinear amplifying loop mirror in the cavity features a 103.4-MHz high repetition rate with up to 93.1 dB signal-to-noise ratio of the radio frequency spectrum, 0.0056% [1 Hz, 1 MHz] integrated root-mean-square amplitude noise at the fundamental repetition rate and 63.7-fs timing jitter [100 Hz, 1 MHz]. Meanwhile, the fundamental repetition frequency was also locked to a stable radio frequency reference by using a self-designed frequency actuator and a relative frequency stability of 2.1 &times; 10<sup>&minus;12</sup> at 1-s gate time was obtained. Moreover, benefitting from the large positive group-velocity dispersion and negative third-order dispersion at 1.5-&mu;m wavelength band, we also achieved 48.2 fs compressed pulse duration as well as an amplified average power of 199 mW via one-stage all-PM fiber amplifier and compressor. At last, as a performance proof, by directly splicing 38-cm long PM highly nonlinear fiber to the pulse compressor, a broadband coherent supercontinuum spanning from 950 nm to 2150 nm was generated. Our all-PM fiber laser system is suitable for the further buildup of a low noise PM fiber optical frequency comb.<br/></div> &copy; 2022
Number of references:55
Main heading:Signal to noise ratio
Controlled terms:Electromagnetic pulse - Fiber amplifiers - Fiber lasers - Group velocity dispersion - Noise figure - Polarization - Polarization-maintaining fiber - Radio waves - Timing circuits - Timing jitter
Uncontrolled terms:Amplitude noise - Amplitude noise and timing jitter - Femtosecond pulse amplification and compression - Femtosecond pulse amplifications - Figure-9 all-polarization-maintaining fiber laser - Polarization maintaining - Polarization maintaining fibre - Polarization-maintaining fiber lasers - Repetition rate - Timing jitters
Classification code:701  Electricity and Magnetism - 711  Electromagnetic Waves - 713.4  Pulse Circuits - 716.1  Information Theory and Signal Processing - 741.1.2  Fiber Optics - 744.4  Solid State Lasers
Numerical data indexing:Decibel 9.31E+01dB, Frequency 1.00E+02Hz, Frequency 1.00E+06Hz, Frequency 1.00E00Hz, Frequency 1.034E+08Hz, Percentage 5.60E-03%, Power 1.99E-01W, Size 3.80E-01m, Size 9.50E-07m to 2.15E-06m, Time 1.00E00s, Time 4.82E-14s, Time 6.37E-14s
DOI:10.1016/j.optlastec.2022.108818
Funding details:  Number: SKLST202105, Acronym: -, Sponsor: -;Number: 61875227, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: XAB2020YN11, Acronym: CAS, Sponsor: Chinese Academy of Sciences;
Funding text:This work is supported by grants from Western Young Scholars Program of CAS (XAB2020YN11), Natural Science Foundation of China (NSFC) (61875227) and the Open Research Fund of State Key Laboratory of Transient Optics and Photonics (SKLST202105).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 41>
 
Accession number:20224813188122
Title:Edge effect removal in Fourier ptychographic microscopy via periodic plus smooth image decomposition    (Open Access)
Authors:Pan, An (1, 2); Wang, Aiye (1, 2, 4); Zheng, Junfu (3); Gao, Yuting (1, 2, 4); Ma, Caiwen (1, 2, 4); Yao, Baoli (1, 2) 
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) The Institute of Optics, University of Rochester, Rochester; NY; 14627, United States; (4) CAS Key Laboratory of Space Precision Measurement Technology, Xi'an; 710119, China 
Corresponding author:Pan, An(panan@opt.cn)
Source title:Optics and Lasers in Engineering
Abbreviated source title:Opt Lasers Eng
Volume:162
Issue date:March 2023
Publication year:2023
Article number:107408
Language:English
ISSN:01438166
CODEN:OLENDN
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">Fourier ptychographic microscopy (FPM) is a promising computational imaging technique with high resolution, wide field-of-view (FOV) and quantitative phase recovery. So far, a series of system errors that may corrupt the image quality of FPM has been reported. However, an imperceptible artifact caused by edge effect caught our attention and may also degrade the precision of phase imaging in FPM with a cross-shape artifact in the Fourier space. We found that the precision of reconstructed phase at the same subregion depends on the different sizes of block processing as a result of different edge conditions, which limits the quantitative phase measurements via FPM. And this artifact is caused by the aperiodic image extension of fast Fourier transform (FFT). Herein, to remove the edge effect and improve the accuracy, two classes of opposite algorithms termed discrete cosine transform (DCT) and periodic plus smooth image decomposition (PPSID) were reported respectively and discussed systematically. Although both approaches can remove the artifacts in FPM and may be extended to other Fourier analysis techniques, PPSID-FPM has a comparable efficiency to conventional FPM algorithm. The PPSID-FPM algorithm improves the standard deviation of phase accuracy as a factor of 4 from 0.08 radians to 0.02 radians. Finally, we summarized and discussed all the reported system errors of FPM within a generalized model.<br/></div> &copy; 2022 Elsevier Ltd
Number of references:37
Main heading:Image enhancement
Controlled terms:Computational Imaging - Computational Photography - Discrete cosine transforms - Fast Fourier transforms - Fourier analysis
Uncontrolled terms:Computational imaging - Computational optical imaging - Edge-effects - Fourier - Fourier ptychographic microscopy - High resolution - Image decomposition - Optical imaging - System errors - Wide field-ofview
Classification code:742.1  Photography - 746  Imaging Techniques - 921  Mathematics - 921.3  Mathematical Transformations
DOI:10.1016/j.optlaseng.2022.107408
Funding details:  Number: 12104500, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:We acknowledge the funds from National Natural Science Foundation of China (NSFC) ( 12104500 ). An Pan thanks Daniel Martin (California Institute of Technology, USA) for helpful discussions and inspiration for this work.
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Green
 
<RECORD 42>
 
Accession number:20232114138209
Title:COMD-free continuous-wave high-power laser diodes by using the multi-section waveguide method
Authors:Demir, Abdullah (1); Ebadi, Kaveh (1); Liu, Yuxian (2, 3); S&uuml;nnet&ccedil;io&#287;lu, Ali Kaan (1); G&uuml;ndo&#287;du, Sinan (1); &#350;eng&uuml;l, Serdar (1); Zhao, Yuliang (2, 3); Lan, Yu (2, 3); Yang, Guowen (2, 3, 4) 
Author affiliation:(1) Bilkent University, UNAM, Institute of Materials Science and Nanotechnology, Ankara; 06800, Turkey; (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) University of Chinese, Academy of Sciences, Beijing; 100049, China; (4) Dogain Laser Technology (Suzhou) Co., Ltd., Suzhou; 215123, China 
Corresponding author:Demir, Abdullah(abdullah.demir@unam.bilkent.edu.tr)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12403
Part number:1 of 1
Issue title:High-Power Diode Laser Technology XXI
Issue date:2023
Publication year:2023
Article number:124030D
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510659117
Document type:Conference article (CA)
Conference name:High-Power Diode Laser Technology XXI 2023
Conference date:January 29, 2023  -  January 30, 2023
Conference location:San Francisco, CA, United states
Conference code:188226
Sponsor:The Society of Photo-Optical Instrumentation Engineers (SPIE)
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">Catastrophic optical mirror damage (COMD) limits the output power and reliability of laser diodes (LDs). The self-heating of the laser contributes to the facet temperature, but it has not been addressed so far. This study investigates a two-section waveguide method targeting significantly reduced facet temperatures. The LD waveguide is divided into two electrically isolated sections along the cavity: laser and passive waveguide. The laser section is pumped at high current levels to achieve laser output. The passive waveguide is biased at low injection currents to obtain a transparent waveguide with negligible heat generation. This design limits the thermal impact of the laser section on the facet, and a transparent waveguide allows lossless transport of the laser to the output facet. Fabricated GaAs-based LDs have waveguide dimensions of (5-mm) x (100-&micro;m) with passive waveguide section lengths varied from 250 to 1500 &micro;m. The lasers were operated continuous-wave up to the maximum achievable power of around 15 W. We demonstrated that the two-section waveguide method effectively separates the heat load of the laser from the facet and results in much lower facet temperatures (Tf). For instance, at 8 A of laser current, the standard laser has Tf = 90 <sup>o</sup>C, and a two-section laser with a 1500 &micro;m long passive waveguide section has Tf = 60 <sup>o</sup>C. While traditional LDs show COMD failures, the multi-section waveguide LDs are COMD-free. Our technique and results provide a pathway for high-reliability LDs, which would find diverse applications in semiconductor lasers.<br/></div> &copy; 2023 SPIE.
Number of references:31
Main heading:Semiconductor lasers
Controlled terms:Continuous wave lasers - Gallium arsenide - High power lasers - III-V semiconductors - Laser mirrors - Pumping (laser) - Reliability - Semiconductor diodes
Uncontrolled terms:Catastrophic optical damage - Catastrophic optical mirror damages - Continuous Wave - Damage-free - Facet temperature - High power - Multi-section - Optical damages - Passive waveguides - Two section
Classification code:712.1  Semiconducting Materials - 714.2  Semiconductor Devices and Integrated Circuits - 741.3  Optical Devices and Systems - 744.1  Lasers, General - 744.4.1  Semiconductor Lasers - 744.7  Laser Components - 804  Chemical Products Generally
Numerical data indexing:Electric current 8.00E+00A, Power 1.50E+01W, Size 5.00E-03m
DOI:10.1117/12.2650619
Funding details:  Number: 118F057, Acronym: T&Uuml;B&#304;TAK, Sponsor: T&uuml;rkiye Bilimsel ve Teknolojik Ara&#351;t&#305;rma Kurumu;
Funding text:The authors gratefully acknowledge the financial support in part from TUBITAK 118F057.
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 43>
 
Accession number:20230613560050
Title:Design of Underwater Wireless Optical Communication and Radar Integrated System
Authors:Li, Peng (1); Yang, Haodong (2); Wang, Shanglin (2); Tu, Min (2); Yan, Qiurong (2); Han, Xiaotian (1); Nie, Wenchao (1); Chang, Chang (1); Liao, Peixuan (1); Wang, Wei (1) 
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi&rsquo;an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, 17 Xinxi Road, New Industrial Park, Xi'an Hi-Tech Industrial Development Zone, Shaanxi, Xi'an; 710119, China; (2) School of Information Engineering, Nanchang University, 999 Xuefu Avenue, Honggu Tan New District, Jiangxi, Nanchang; 330031, China 
Corresponding author:Wang, Wei(wangwei2012@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12561
Part number:1 of 1
Issue title:AOPC 2022: Atmospheric and Environmental Optics
Issue date:2023
Publication year:2023
Article number:1256109
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510662360
Document type:Conference article (CA)
Conference name:2022 Applied Optics and Photonics China: Atmospheric and Environmental Optics, AOPC 2022
Conference date:December 18, 2022  -  December 19, 2022
Conference location:Virtual, Online, China
Conference code:186193
Sponsor:Chinese Society for Optical Engineering (CSOE)
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">As a new type of technology, the integrated system of underwater wireless optical communication and radar will play a huge role in realizing flexible and high-speed communication links between underwater vehicles, underwater monitoring points, and marine vessels. It plays an important role in wireless sensor networks, ocean exploration and detection. This paper proposes an integrated system of underwater wireless optical communication and radar, which integrates the functions of communication and radar in the same system. A time-slot synchronous clock recovery method is proposed to recover communication signals and achieve high-reliability communication; a high-precision target imaging algorithm based on the first photon is proposed to achieve high-precision radar imaging. The communication performance is verified by simulation, and the influence of radar imaging quality is verified by experiment. The results show that the system can not only achieve the function of single-photon wireless optical communication, but also achieve the high-quality target imaging of single-photon level.<br/></div> &copy; 2023 SPIE.
Number of references:16
Main heading:Optical communication
Controlled terms:Integrated control - Integrated optics - Optical radar - Particle beams - Photons - Radar imaging
Uncontrolled terms:Communication integration - High precision radar imaging - High reliability - High reliability communication - High-precision - Integrated systems - Radar integration - Target imaging - Type of technology - Underwater wireless optical communications
Classification code:716.2  Radar Systems and Equipment - 717.1  Optical Communication Systems - 731.1  Control Systems - 741.3  Optical Devices and Systems - 931.3  Atomic and Molecular Physics - 932.1  High Energy Physics
DOI:10.1117/12.2651833
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 44>
 
Accession number:20232114138213
Title:48 W continuous-wave output power with high efficiency from a single emitter laser diode at 915 nm
Authors:Yang, Guowen (1, 2, 3); Liu, Yuxian (2, 3); Zhao, Yongming (1); Tang, Song (1); Zhao, Yuliang (2, 3); Lan, Yu (2, 3); Bai, Longgang (1); Li, Ying (1); Wang, Ximin (1); Demir, Abdullah (4) 
Author affiliation:(1) Dogain Laser Technology (Suzhou) Co., Ltd., Suzhou; 215123, 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) University of Chinese Academy of Sciences, Beijing; 100049, China; (4) Bilkent University, UNAM, Institute of Materials Science and Nanotechnology, Ankara; 06800, Turkey 
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12403
Part number:1 of 1
Issue title:High-Power Diode Laser Technology XXI
Issue date:2023
Publication year:2023
Article number:124030H
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510659117
Document type:Conference article (CA)
Conference name:High-Power Diode Laser Technology XXI 2023
Conference date:January 29, 2023  -  January 30, 2023
Conference location:San Francisco, CA, United states
Conference code:188226
Sponsor:The Society of Photo-Optical Instrumentation Engineers (SPIE)
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">Improving the power and efficiency of 9xx-nm broad-area laser diodes reduces the cost of laser systems and expands applications. LDs with more than 25 W output power combined with power conversion efficiency (PCE) above 65% can provide a cost-effective high-power laser module. We report a high output power and high conversion efficiency laser diode operating at 915 nm by investigating the influence of the laser internal parameters on its output. The asymmetric epitaxial structure is optimized to achieve low optical loss while considering high internal efficiency, low series resistance, and modest optical confinement factor. Experimental results show an internal optical loss of 0.31 cm<sup>-1</sup> and internal efficiency of 96%, in agreement with our simulation results. Laser diodes with 230 &mu;m emitter width and 5 mm cavity length have T0 and T1 characteristic temperatures of 152 and 567 K, respectively. The maximum power conversion efficiency reaches 74.2% at 5 &deg;C and 72.6% at 25 &deg;C, and the maximum output power is 48.5 W at 48 A (at 30 &#8451;), the highest reported for a 9xx-nm single emitter laser diode. At 25 <sup>o</sup>C, a high PCE of 67.5% is achieved for the operating power of 30 W at 27.5 A, and the lateral far-field angle with 95% power content is around 8&deg;. Life test results show no failure in 1200 hours for 55 laser diodes. In addition, 55.5 W output was achieved at 55 A from a laser diode with 400 &mu;m emitter width and 5.5 mm cavity length. A high PCE of 64.3% is obtained at 50 W with 47 A.<br/></div> &copy; 2023 SPIE.
Number of references:23
Main heading:Semiconductor lasers
Controlled terms:Conversion efficiency - Cost effectiveness - Electric resistance - High power lasers - Power semiconductor diodes
Uncontrolled terms:915 nm - Cavity length - Continuous wave output power - Continuous-wave output power - High power - Higher efficiency - Internal efficiencies - Power conversion efficiencies - Single emitter lasers
Classification code:525.5  Energy Conversion Issues - 701.1  Electricity: Basic Concepts and Phenomena - 714.2  Semiconductor Devices and Integrated Circuits - 744.1  Lasers, General - 744.4.1  Semiconductor Lasers - 911.2  Industrial Economics
Numerical data indexing:Electric current 2.75E+01A, Electric current 4.70E+01A, Electric current 4.80E+01A, Electric current 5.50E+01A, Percentage 6.43E+01%, Percentage 6.50E+01%, Percentage 6.75E+01%, Percentage 7.26E+01%, Percentage 7.42E+01%, Percentage 9.50E+01%, Percentage 9.60E+01%, Power 2.50E+01W, Power 3.00E+01W, Power 4.80E+01W, Power 4.85E+01W, Power 5.00E+01W, Power 5.55E+01W, Size 2.30E-04m, Size 3.10E-03m, Size 4.00E-04m, Size 5.00E-03m, Size 5.50E-03m, Size 9.15E-07m, Temperature 1.52E+02K, Temperature 2.78E+02K, Temperature 2.98E+02K, Temperature 5.67E+02K, Time 4.32E+06s
DOI:10.1117/12.2650049
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 45>
 
Accession number:20231713955230
Title:Numerical simulation of the large-gap and small-gap pre-ionized direct-current glow discharges in atmospheric helium
Authors:Liu, Zaihao (1, 2); Liu, Yinghua (1, 2); Ran, Shuang (1, 2); Xu, Boping (1, 2); Yin, Peiqi (1, 2); Li, Jing (3); Wang, Yishan (1, 2); Zhao, Wei (1, 2); Wang, Hui (4); Tang, Jie (1, 2) 
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, CAS, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Faculty of Mathematics and Physics, Huaiyin Institute of Technology, Huaian; 223003, China; (4) Near-Surface Detection Laboratory, The First Scientific Research Institute of Wuxi, Wuxi; 214035, China 
Corresponding author:Tang, Jie(tangjie@opt.ac.cn)
Source title:Physics of Plasmas
Abbreviated source title:Phys. Plasmas
Volume:30
Issue:4
Issue date:April 1, 2023
Publication year:2023
Article number:043507
Language:English
ISSN:1070664X
E-ISSN:10897674
CODEN:PHPAEN
Document type:Journal article (JA)
Publisher:American Institute of Physics Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">A one-dimensional self-consistent fluid model was employed to comparatively investigate the influence of pre-ionization on the helium direct-current glow discharge in the large gap and the small gap at atmospheric pressure. For the large-gap and small-gap discharges, the negative glow space and the cathode fall layer are both offset to the cathode with the increase in pre-ionization, which is mainly ascribed to the decrease in charged particle density in the original negative glow space as a result of the increased probability of collision and recombination between ions and electrons, and the new balance between the positive and negative charges established at the distance closer to the cathode. The electron density tends to grow in the negative glow space due to the elevated pre-ionization, while the ion density exhibits an overall downward tendency in the cathode fall layer because the increase in secondary electrons produces more newly born electrons that neutralize more ions via the recombination reaction. Thanks to the pre-ionization, a significant reduction of sustaining voltage and discharge power is obtained in both the large-gap and small-gap discharges. A remarkable characteristic is that the absent positive column in the small-gap discharge comes into being again due to the pre-ionization. Moreover, with the increase in the pre-ionization level, the potential fall shifts from the cathode fall layer to the positive column in the large-gap discharge, while it is always concentrated in the cathode fall layer in the small-gap discharge.<br/></div> &copy; 2023 Author(s).
Number of references:45
Main heading:Cathodes
Controlled terms:Atmospheric ionization - Atmospheric pressure - Electrons - Glow discharges - Helium - Ionization potential - Ions
Uncontrolled terms:Atmospheric helium - Cathode fall - Direct current glow discharges - Fluid modeling - One-dimensional - Particle densities - Positive charges - Positive column - Pre-ionization - Small gaps
Classification code:443.1  Atmospheric Properties - 701.1  Electricity: Basic Concepts and Phenomena - 801.4  Physical Chemistry - 802.2  Chemical Reactions - 804  Chemical Products Generally - 931.3  Atomic and Molecular Physics
DOI:10.1063/5.0138129
Funding details:  Number: 6142414200714, Acronym: -, Sponsor: -;Number: 51877210,52177166, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2020JM-309, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;
Funding text:The authors are grateful for financial support from the National Natural Science Foundation of China (Grant Nos. 52177166 and 51877210), the Natural Science Foundation of Shaanxi Province (Grant No. 2020JM-309), and the Stability of Scientific Research Funding of Science and Technology on Near-Surface Detection Laboratory (Grant No. 6142414200714).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 46>
 
Accession number:20230613567314
Title:Reflective epoxy resin/chitosan/PAA composite-functionalized fiber-optic interferometric probe sensor for sensitive heavy metal ion detection
Authors:Yan, Minglu (1); Wang, Ruiduo (1, 2); Li, Yang (3); Kang, Xin (1); Zhang, Zaikun (2); Li, Yangyang (1); Jiang, Man (1) 
Author affiliation:(1) State Key Laboratory of Photon-Technology in Western China Energy, International Collaborative Center on Photoelectric Technology and Nano Functional Materials, School of Physics, Institute of Photonics & Photon Technology, Northwest University, Xi'an; 710069, 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) Key Laboratory of Aperture Array and Space Application, 38th Research Institute of China Electronics Technology Group Corporation, HeFei; 230000, China 
Corresponding authors:Wang, Ruiduo(wangruiduo@opt.ac.cn); Jiang, Man(jmnwu@nwu.edu.cn)
Source title:Analyst
Abbreviated source title:Analyst
Volume:148
Issue:5
Issue date:January 21, 2023
Publication year:2023
Pages:1075-1084
Language:English
ISSN:00032654
E-ISSN:13645528
CODEN:ANALAO
Document type:Journal article (JA)
Publisher:Royal Society of Chemistry
Abstract:<div data-language="eng" data-ev-field="abstract">A highly sensitive label-free chemical sensing platform for the detection of various metal ions is demonstrated. The chemical sensor was derived from a single-mode fiber that is inserted into the ceramic tube with epoxy resin (ER) on the end face for reflecting light and forms the Fabry-Perot (F-P) interferometric cavity. Multilayer chitosan (CS)/polyacrylic acid (PAA) were coated on the surface of the epoxy resin and act as the sensitive film. Based on the analysis of the sensing principle and the F-P cavity structure, the parameters were numerically simulated and experimentally evaluated, which enables ease of fabrication and real-time modulation of the cavity length. The sensitivity of sensing Ni<sup>2+</sup>, Zn<sup>2+</sup>, and Na<sup>+</sup> reached 9.95 &times; 10<sup>&minus;4</sup> nm ppb<sup>&minus;1</sup>, 2.31 &times; 10<sup>&minus;4</sup> nm ppb<sup>&minus;1</sup>, and 4 &times; 10<sup>&minus;4</sup> nm ppb<sup>&minus;1</sup>, respectively, and the sensing results were theoretically analyzed by the Langmuir adsorption model, which corresponds to the surface atom percentage results obtained by SEM and EDS measurements for sensing three types of metal ions. The proposed ER/CS/PAA multilayer film-coated F-P sensor can be employed as a probe, which features label-free, highly sensitivity, real-time monitoring, ease of measurement, stability, and therefore provides a remarkable analytical platform for chemical applications.<br/></div> &copy; 2023 The Royal Society of Chemistry.
Number of references:42
Main heading:Metal ions
Controlled terms:Chemical detection - Chemical sensors - Chemical stability - Epoxy resins - Fabry-Perot interferometers - Heavy metals - Interferometry - Multilayers - Probes - Single mode fibers
Uncontrolled terms:Chemical sensing - Fiber-optics - Functionalized - Heavy metal ion - Interferometric probe - Label free - Metal ion detection - Metals ions - Poly(acrylic acid) - Probe sensor
Classification code:531  Metallurgy and Metallography - 531.1  Metallurgy - 741.1.2  Fiber Optics - 801  Chemistry - 815.1.1  Organic Polymers - 941.3  Optical Instruments - 941.4  Optical Variables Measurements
Numerical data indexing:Size 2.31E-13m, Size 4.00E-13m, Size 9.95E-13m
DOI:10.1039/d2an01740g
Funding details:  Number: 2018JM1059, Acronym: -, Sponsor: -;Number: 61535015, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:The authors acknowledge funding from National Natural Foundation of China (NSFC) (61535015); the Science and Technology Innovation and Entrepreneurship Double Tutor Project of Shaanxi Province (2018JM1059).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 47>
 
Accession number:20232114130493
Title:Stand-off Detection of Explosive Hazards Based on Time-gated Raman Spectroscopy
Authors:Zhang, Pu (1, 2); Zhu, Xiangping (1, 2); Ren, Wenzhen (2); Wang, Bo (2, 3); Yang, Junhong (2) 
Author affiliation:(1) Key & Core Technology Innovation Institute of the Greater Bay Area, Building B3, No.11 kaiyuan Avenue, Huangpu District, Guangdong, Guangzhou; 510535, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, No.17 Xinxi Road, New Industrial Park, Xi'an Hi-Tech Industrial Development Zone, Shaanxi, Xi'an; 710119, China; (3) University of Chinese Academy of Sciences, No. 19 Yuquan Road, Shijingshan District, Beijing; 100049, China 
Corresponding author:Zhang, Pu(zhangpu@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12617
Part number:1 of 1
Issue title:Ninth Symposium on Novel Photoelectronic Detection Technology and Applications
Issue date:2023
Publication year:2023
Article number:126174J
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510664432
Document type:Conference article (CA)
Conference name:9th Symposium on Novel Photoelectronic Detection Technology and Applications
Conference date:April 21, 2023  -  April 23, 2023
Conference location:Hefei, China
Conference code:188142
Sponsor:Chinese Society for Optical Engineering; Science and Technology on Low-light-level Night Vision Laboratory
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">There are currently lots of research activities concerning explosive hazards detection, and stand-off detection of explosives is in main focus. The reason for this interest is the occurrence of terrorist attacks on the civilian society involving improvised explosives devices IED. Laser-based spectroscopies are the only currently viable techniques that can be utilized to detect trace amounts of explosives at stand-off distances. In particular, Raman spectroscopy (RS) has been shown to be effective for stand-off detection and has the ability to both detect and identify explosive materials. Raman spectroscopy is virtually instantaneous, non-destructive in nature and provides high selectivity. The traditional Raman spectrometer utilizes continuous lasers and CCDs to detection the scattering signal, which greatly limits the application of Raman spectroscopy in the stand-off detection of explosive hazards due to the weak signal, strong background fluorescence, ambient light interference, and long analysis time. Time-gated Raman spectroscopies are based on ultrafast pulsed lasers and time-resolved single-photon detection techniques. Through the time-gated method, the Raman signal intensity can be greatly improved, and the influence of fluorescence and environmental light can be effectively suppressed. In this work, the time-gated Raman system utilizing frequency-doubled Nd:YAG lasers at 532 nm excitation was developed. The Cassegrain telescope was coupled to the Raman spectrometer using a fiber optics cable, and Notch filter was used to reject Rayleigh scattering light. The Raman scattered light was collected by a telescope and then transferred via fiber optic to spectrometer and finally directed into intensified CMOS (ICMOS) detector. The applications of time-gated Raman spectroscopy in stand-off detection of hazardous explosives have been performed. The Raman spectra of DNT, TNT, RDX and NaNO3 at a stand-off distance of 50 m have been identified with a detection limit of 1 mg/cm<sup>2</sup><br/></div> &copy; 2023 SPIE.
Number of references:9
Main heading:Fluorescence
Controlled terms:Explosives - Explosives detection - Hazards - Neodymium lasers - Notch filters - Particle beams - Photons - Pulsed lasers - Raman spectroscopy - Sodium nitrate  - Spectrometers - Yttrium aluminum garnet
Uncontrolled terms:Detection of explosives - Explosive hazard detections - Explosive hazards - Improvised explosives devices - Raman spectrometers - Research activities - Stand-off - Standoff detection - Terrorists attack - Time-gated
Classification code:703.2  Electric Filters - 741.1  Light/Optics - 741.3  Optical Devices and Systems - 744.1  Lasers, General - 744.4  Solid State Lasers - 801  Chemistry - 804.2  Inorganic Compounds - 914.1  Accidents and Accident Prevention - 931.3  Atomic and Molecular Physics - 932.1  High Energy Physics
Numerical data indexing:Linear density 1.00E-04kg/m, Size 5.00E+01m, Size 5.32E-07m
DOI:10.1117/12.2666356
Funding details:  Number: 2019B090917012, Acronym: -, Sponsor: -;Number: 62075237, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:We would like to acknowledge support from the Natural Science Foundation of China under Grant 62075237 and Guangdong Province Key R&D Program 2019B090917012.We would like to acknowledge support from the Natural Science Foundation of China under Grant 62075237 and
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 48>
 
Accession number:20231713945920
Title:Effect of La Doping on the Radiation Damage Effect of Er<sup>3+</sup>-Doped Silica Fibers for Space Laser Communication
Title of translation:La &#25530;&#26434;&#23545;&#29992;&#20110;&#31354;&#38388;&#28608;&#20809;&#36890;&#20449;&#30340;&#25530;&#38098;&#20809;&#32420;&#36752;&#23556;&#25439;&#20260;&#25928;&#24212;&#30340;&#24433;&#21709;
Authors:Wen, Xuan (1); Yang, Shengsheng (1); Gao, Xin (1); She, Shengfei (2, 3); Wang, Gencheng (2, 3); Feng, Zhanzu (1); Wang, Jun (1); Yin, Hong (1); Hou, Chaoqi (2, 3); Zhang, Jianfeng (1) 
Author affiliation:(1) National Defense Science and Technology Key Lab for Space Materials Behavior and Evaluation, Lanzhou Institute of Physics, Lanzhou; 730000, 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) China Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing; 100049, China 
Corresponding author:Yang, Shengsheng(2syang@sina.com)
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:52
Issue:2
Issue date:February 2023
Publication year:2023
Article number:0206003
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">Space laser communication has the outstanding advantages of large transmission bandwidth&#65292;high transmission rate&#65292;and strong anti-interference ability&#65292;which is an important development direction of future communication technology. Since relay amplification cannot be realized in space laser communication links&#65292;a large transmission optical power is required in addition to ensuring a high modulation rate. Erbium-doped fiber amplifier achieves the amplification of 1.55 &mu;m optical signal through the three-layer structure of erbium ions. The erbium-doped fiber is the core component of the erbium-doped fiber amplifier&#65292;and the erbium-doped fiber is a silicon fiber doped with a small number of erbium ions. In the space irradiation environment&#65292;high-energy particles impact the erbium-doped fiber&#65292;the core component of the erbium-doped fiber amplifier&#65292;resulting in a large number of carriers in the fiber&#65292;which combines with the original defects in the fiber to form new color-centered defects. The core defect leads to a dramatic increase in the loss of the fiber in the operating band&#65292;as well as a decrease in the gain performance of the erbium-doped fiber. As a rare earth element&#65292;La&#65292;like Er&#65292;is present in the interstitial positions of the quartz lattice structure. It can compete with Er ions for the interstitial positions and act as a dispersion of Er ions. It can achieve Al without affecting the maximum amount of Er ion doping. Low dose doping. La doping can disperse Er ions and suppress fluorescence quenching. There are few studies on the radiation effects of lanthanum-doped erbium-doped fibers. It is important to further understand the radiation-induced absorption mechanism of erbium-doped fibers to improve the performance of erbium-doped fibers in harsh environments. To verify the effect of La doping on the radiation resistance of erbium-doped fibers&#65292;two types of erbium-doped fibers&#65292;lanthanum-doped and non-lanthanum-doped&#65292;are selected in this paper&#65292;and the macroscopic radiation gain resistance performance and microstructural changes of the fibers are investigated. Radiation damage test study. The optical fiber was irradiated with a 60Co irradiation source at room temperature at a cumulative dose of 100 krad and a dose rate of 6.17 rad/s. The loss of the fiber was found to decrease along the wavelength direction in the range of 843~1 659 nm by electron probe tests and loss spectroscopy tests before and after irradiation&#65292;as well as online loss tests at specific wavelength points. However&#65292;the five fixed wavelength tests are not sufficient to fully express the loss variation of the fiber in each wavelength band under an irradiation environment. Offline loss tests were performed on both fibers before and after irradiation. The results showed that the increment before and after irradiation was 3 019 dB/km for S1 and 3 922 dB/km for S2. The loss increment of S2 after irradiation was significantly larger than that of S1 after irradiation. it was speculated that Al-OHC mainly caused the radiation-induced absorption. Absorption spectroscopy tests showed that La doping did not cause any change in the performance of Er ions in the fiber. the loss of the La-doped fiber at 1 200 nm was 0.030 67 dB/&#65288;km&middot;krad&#65289;&#65292;which was lower than 0.039 53 dB/&#65288;km&middot;krad&#65289;&#65292;and the gain of the La-doped fiber changed very little in the irradiated environment. The properties of the core matrix material did not change after irradiation by Raman testing&#65292;which proves that La doping does not cause changes in the glass lattice structure of the fiber. The paramagnetic defects of the fibers were further tested by electron paramagnetic resonance spectroscopy. The EPR signal intensities of the color-centered defects corresponding to Ge and Si did not differ much between the two types of light at 3 370 Gauss by fiber absorption spectroscopy and EPR tests. the peak at 3 330 Gauss is mainly due to the difference in Al content. the higher Al content in S2 produces a higher number of Al-OHC defects in the irradiated environment&#65292;and the corresponding EPR signal is stronger. the higher number of Al-OHC defects in S2 leads to a larger radiation-induced absorption in the 700~1 600 nm band&#65292;and the conclusion that the higher number of Al-OHC defects in S2 is consistent with the results of absorption spectroscopy tests before and after previous irradiation. The changes of Al-related paramagnetic defects in the fiber before and after irradiation were analyzed&#65292;indicating that the increase of Al content leads to more Al-OHC defects after irradiation&#65292;which in turn affects the gain performance of the fiber after irradiation. Further&#65292;by testing the gain performance of the two fibers before and after irradiation&#65292;it was found that the gain performance of the La-doped fiber changed less. It was verified that the loss and gain changes of the lanthanum- and erbium-doped fibers are smaller after irradiation&#65292;which indicates that lanthanum doping can improve the radiation resistance of the fibers. The doping of La can replace Al as the dispersant of Er ion to improve the radiation resistance of the fiber to a certain extent&#65292;and the doping of La does not negatively affect the gain performance of the fiber. This study can provide a reference for the radiation-hardening design of special optical fibers for subsequent space applications.<br/></div> &copy; 2023 Chinese Optical Society. All rights reserved.
Number of references:16
Main heading:Irradiation
Controlled terms:Erbium - Erbium doped fiber amplifiers - Fluorescence - Ions - Light transmission - Optical communication - Optical fibers - Quenching - Radiation damage - Rare earths
Uncontrolled terms:Erbium- doped fibers - Erbium-doped fiber amplifiers - Gain performance - Gamma irradiation - La doping - Lanthana doped - Lanthana doping - Performance - Radiation-induced absorption - Space laser communication
Classification code:537.1  Heat Treatment Processes - 547.2  Rare Earth Metals - 717.1  Optical Communication Systems - 741.1  Light/Optics - 741.1.2  Fiber Optics - 741.3  Optical Devices and Systems - 744.7  Laser Components - 804.2  Inorganic Compounds
Numerical data indexing:Absorbed dose 1.00E+05Gy, Angular velocity 6.17E+00rad/s, Decibel 1.90E+01dB, Decibel 5.30E+01dB, Decibel 6.70E+01dB, Decibel 9.22E+02dB, Size 1.55E-06m, Size 2.00E-07m, Size 6.00E-07m, Size 6.59E-07m
DOI:10.3788/gzxb20235202.0206003
Funding details:  Number: 6142910210210, Acronym: -, Sponsor: -;Number: -, Acronym: CASC, Sponsor: China Aerospace Science and Technology Corporation;
Funding text:&#65306;National Defense Science and Technology Key Laboratory Fund Project&#65288;No. 6142910210210&#65289;&#65292;CASC Self-developed Projects
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 49>
 
Accession number:20232614309168
Title:Optical Forces on Multipoles Induced by the Belinfante Spin Momentum
Authors:Zhou, Yuan (1, 2); Zhang, Yanan (1, 2); Xu, Xiaohao (1); Nieto-Vesperinas, Manuel (3); Yan, Shaohui (1); Li, Manman (1); Gao, Wenyu (1, 2); Zhang, Yao (4); Yao, Baoli (1, 2) 
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Cient&iacute;ficas, Campus de Cantoblanco, Madrid; 28049, Spain; (4) Institute of Nanophotonics, Jinan University, Guangzhou; 511443, China 
Corresponding authors:Xu, Xiaohao(xuxiaohao@opt.ac.cn); Yan, Shaohui(shaohuiyan@opt.ac.cn); Yao, Baoli(yaobl@opt.ac.cn); Zhang, Yao(zhyao5@jnu.edu.cn)
Source title:Laser and Photonics Reviews
Abbreviated source title:Laser Photon. Rev.
Issue date:2023
Publication year:2023
Language:English
ISSN:18638880
E-ISSN:18638899
Document type:Article in Press
Publisher:John Wiley and Sons Inc
Abstract:<div data-language="eng" data-ev-field="abstract">The Belinfante spin momentum (BSM) is a fundamental yet enigmatic quantity of electromagnetic fields. It vanishes from the global momentum of the field, but can be detected locally, manifesting itself as an optical force on small particles. Hitherto, however, the BSM force is a concept well established only within the dipole approximation, and there is no explicit experimental evidence for its action on multipoles. Here, a theoretical model for multipolar BSM forces, exerted on generic Mie particles supporting multipoles of arbitrary order,&nbsp;is developed. This multipolar mechanical action is observed experimentally from a structured light field, which suppresses the effect of spin&ndash;orbit coupling. It can also selectively enhance the multipolar BSM forces, while restraining the dipolar component on a probe particle (Au sphere). These results constitute a distinct chapter in the physics of high-order interactions in light&ndash;matter systems and can facilitate additional progress in optomechanics, optical manipulation, and Mie-tronics.<br/></div> &copy; 2023 Wiley-VCH GmbH.
Number of references:53
Main heading:Optical tweezers
Controlled terms:Electromagnetic fields - Momentum
Uncontrolled terms:Dipole approximation - Experimental evidence - Metallic particles - Momentum force - Multipoles - Optical force - Orbital rotations - Small particles - Spin momentum - Spin momentum flow
Classification code:701  Electricity and Magnetism - 744.9  Laser Applications - 931.1  Mechanics
DOI:10.1002/lpor.202300245
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 50>
 
Accession number:20232614322605
Title:The research progress in underwater wireless optical communication technology
Authors:Li, Peng (1); Han, Xiaotian (1, 2); Nie, Wenchao (1); Chang, Chang (1); Li, Guangying (1); Liao, Peixuan (1, 2); Wang, Wei (1) 
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics Xi&rsquo;an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, 17 Xinxi Road, New Industrial Park, Xi'an Hi-Tech Industrial Development Zone, Shaanxi, Xi'an; 710119, China; (2) School of Future Technology, University of Chinese Academy of Science, No.1 Yanqi Lake East Road, Huairou District, Beijing; 101408, China 
Corresponding author:Wang, Wei
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12706
Part number:1 of 1
Issue title:First International Conference on Spatial Atmospheric Marine Environmental Optics, SAME 2023
Issue date:2023
Publication year:2023
Article number:127060T
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510666337
Document type:Conference article (CA)
Conference name:1st International Conference on Spatial Atmospheric Marine Environmental Optics, SAME 2023
Conference date:April 7, 2023  -  April 9, 2023
Conference location:Shanghai, China
Conference code:189236
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">Underwater wireless optical communication, which is an effective technical way to build a high-speed and flexible underwater wireless communication network due to its large bandwidth, good confidentiality and low time delay, is widely regarded as a complementary communication way to hydroacoustic communication. The newest research progress and main technical specification in the current technology of underwater wireless optical communication are introduced, the characteristics of the current underwater wireless optical communication technology are summarized in this paper. A series of improvement measures are proposed for the problems of short communication distance and low robustness in underwater wireless optical communication system, which can provide references for underwater wireless optical communication technology research and engineering project development.<br/></div> &copy; 2023 SPIE.
Number of references:62
Main heading:Optical communication
Controlled terms:Underwater optical wireless communication
Uncontrolled terms:Bule-green optical communication - High Speed - Optical communication technologies - Sea channel - Underwater channels - Underwater communication - Underwater communication network - Underwater optical communications - Underwater wireless optical communications - Wireless communications networks
Classification code:675  Marine Engineering - 717.1  Optical Communication Systems
DOI:10.1117/12.2682867
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 51>
 
Accession number:20225213304872
Title:Dynamics of Dark Pulse Affected by Higher-Order Effects in Microresonators    (Open Access)
Authors:Shi, Wenmi (1); Li, Zhiheng (1); Fan, Xuening (1); Sun, Qiyuan (1); Liu, Mulong (1); Huang, Huimin (2); Lu, Zhizhou (3); Zhao, Wei (4) 
Author affiliation:(1) Northwest A and F University, Institute for School of Science, Yangling; 712100, China; (2) Institute for College of Information Engineering, Northwest A and F University, Yangling; 712100, China; (3) Institute for Chongqing United Microelectronics Center, Chongqing; 401332, China; (4) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Institute for State Key Laboratory of Transient Optics and Photonics, Xi'an; 710119, China 
Corresponding authors:Liu, Mulong(lingshu@nwafu.edu.cn); Huang, Huimin(huanghm@nwafu.edu.cn)
Source title:IEEE Photonics Journal
Abbreviated source title:IEEE Photon. J.
Volume:15
Issue:1
Issue date:February 1, 2023
Publication year:2023
Article number:3000207
Language:English
E-ISSN:19430655
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">We theoretically investigate dynamics of dark pulse and Raman-Kerr microcombs generation influenced by higher-order effects, including high-order dispersion (HOD), stimulated Raman scattering (SRS) and self-steepening (SS) effects in silicon microresonators. These three effects cause the delay of dark pulse individually, or interact with each other to alter the drift velocity and direction of pulses. HOD effect can change pulse shift direction and even cause bifurcation. The temporal drift induced by SS or SRS effects could be balanced by the simultaneous third-order dispersion (TOD) engineering. In spectral domain, stable Raman-Kerr frequency comb will be generated due to the competition between strong SRS and Kerr effects. The Raman comb components are suppressed when HOD effect coexists, while SS effect has ignorable effect on the distribution of the Raman comb. Furthermore, the SS effect will increase the total energy of the spectrum by shifting the dispersive wave (DW) generation to the longer wavelength side. Our findings could deepen the understanding of intracavity nonlinear dynamics and provide theoretical guidance to precisely control the stabilization of dark pulse and the generation of broadband mid-infrared (MIR) microcomb.<br/></div> &copy; 2009-2012 IEEE.
Number of references:63
Main heading:Stimulated Raman scattering
Controlled terms:Dispersion (waves) - Dynamics - Microresonators - Optical Kerr effect
Uncontrolled terms:Dark pulse - Dispersion effect - High-order dispersion - Higher order dispersion - Higher-order - Micro resonators - Microcombs - Scattering effects - Self steepening effect - Self-steepening
Classification code:711  Electromagnetic Waves - 741.1  Light/Optics - 744.7  Laser Components
DOI:10.1109/JPHOT.2022.3227173
Funding details:  Number: 12204381,52002331, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2022JQ-066,2022JQ-688, Acronym: -, Sponsor: Natural Science Basic Research Program of Shaanxi Province;
Funding text:This work was supported in part by the Natural Science Basic Research Program of Shaanxi under Grants 2022JQ-066 and 2022JQ-688, and in part by the National Natural Science Foundation of China under Grants 52002331 and 12204381.
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
 
<RECORD 52>
 
Accession number:20232414207405
Title:Enhancing the Quantum Correlation of Biphotons via Coherent Energy Redistribution
Authors:Crockett, Benjamin (1); Montaut, Nicola (1); Howe, James Van (1, 2); Roztocki, Piotr (1, 3); Liu, Yang (1, 4, 5); Helsten, Robin (1); Zhao, Wei (4, 5); Morandotti, Roberto (1); Azana, Jose (1) 
Author affiliation:(1) Institut National de la Recherche Scientifique, Centre &Eacute;nergie Mat&eacute;riaux T&eacute;l&eacute;communications (INRS-EMT), Montr&eacute;al; QC, Canada; (2) Augustana College, Department of Physics and Astronomy, Rock Island; IL, United States; (3) Ki3 Photonics Technologies Inc, Montr&eacute;al; QC, Canada; (4) Xi'an Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences, State Key Laboratory of Transient Optics and Photonics, Xi'an; 710119, China; (5) University of Chinese Academy of Sciences, Beijing; 100049, China 
Corresponding author:Crockett, Benjamin(Benjamin.crockett@inrs.ca)
Source title:2023 Optical Fiber Communications Conference and Exhibition, OFC 2023 - Proceedings
Abbreviated source title:Opt. Fiber Commun. Conf. Exhib., OFC - Proc.
Part number:1 of 1
Issue title:2023 Optical Fiber Communications Conference and Exhibition, OFC 2023 - Proceedings
Issue date:2023
Publication year:2023
Article number:Th3J.6
Language:English
ISBN-13:9781957171180
Document type:Conference article (CA)
Conference name:2023 Optical Fiber Communications Conference and Exhibition, OFC 2023
Conference date:May 5, 2023  -  May 9, 2023
Conference location:San Diego, CA, United states
Conference code:188820
Sponsor:Acacia Communications Inc.; acphotonics; Amphenol; Ciena; Cisco; et al.
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Towards meeting the strict demands of practical quantum networks, we leverage coherent energy redistribution for noise-tolerant quantum signal processing. We demonstrate the enhancement of noisy biphoton coincidence-to-accidental ratios by up to 3.8 times.<br/></div> &copy; 2023 The Author(s).
Number of references:13
Main heading:Signal processing
Controlled terms:Quantum optics
Uncontrolled terms:Biphotons - Energy re distributions - Noise tolerants - Quantum correlations - Quantum network - Quantum signal processing
Classification code:716.1  Information Theory and Signal Processing - 741.1  Light/Optics - 931.4  Quantum Theory; Quantum Mechanics
DOI:10.23919/OFC49934.2023.10117058
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 53>
 
Accession number:20230313391063
Title:Avoided mode-crossing assisted single soliton formation
Authors:Wang, Xinyu (1, 2); Wang, Wei-qiang (1, 2); Xie, Peng (3); Wang, Yang (1, 2); Chu, Sai T. (4); Little, Brent.E. (1, 2); Zhao, Wei (1, 2); Zhang, Wen-fu (1, 2) 
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) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Department of Engineering Science, University of Oxford, Parks Road, Oxford; OX1 3PJ, United Kingdom; (4) Department of Physics and Materials Science, City University of Hong Kong, Hong Kong 
Corresponding author:Xie, Peng(PENG.XIE@ENG.OX.AC.UK)
Source title:Optics and Laser Technology
Abbreviated source title:Opt Laser Technol
Volume:161
Issue date:June 2023
Publication year:2023
Article number:109118
Language:English
ISSN:00303992
CODEN:OLTCAS
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">Single soliton micro-comb (SMC) provides a tool for nonlinear optics investigation, and has become a novel integrated coherent source for portable optical clock, precise measurement and massive parallel optical communication systems, etc. Here, we demonstrate a new approach for deterministic single soliton generation in a microresonator. The microresonator is pumped at a mode with a frequency shift of &minus;160 MHz due to the avoided mode-crossing (AMX), which enhances the local dispersion to form native mode spaced (NMS) Turing pattern directly. The Turing pattern provides a potential field to capture and sustain single soliton. Moreover, the high power chaotic microcomb is absent, which enables stable accessing of single SMC state. Our experiment presents a different dynamics of single soliton generation, which paves a new way for stable and deterministic single soliton micro-comb formation for practical applications.<br/></div> &copy; 2023 Elsevier Ltd
Number of references:36
Main heading:Nonlinear optics
Controlled terms:Microresonators - Optical communication - Solitons
Uncontrolled terms:AMX - Coherent sources - Deterministics - Micro resonators - Microcombs - Native mode spaced microcomb - Single soliton - Soliton formation - Soliton generation - Turing patterns
Classification code:717.1  Optical Communication Systems - 741.1  Light/Optics - 741.1.1  Nonlinear Optics - 744.7  Laser Components
Numerical data indexing:Frequency 1.60E+08Hz
DOI:10.1016/j.optlastec.2023.109118
Funding details:  Number: 62075238, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: E0291113, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: -, Acronym: -, Sponsor: West Light Foundation of the Chinese Academy of Sciences;
Funding text:This work was supported by National Natural Science Foundation of China (62075238); West Light Foundation of the Chinese Academy of Sciences (E0291113).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 54>
 
Accession number:20231914059704
Title:High-accuracy relative arrival time measurement for coherent beam combination based on double-humped interferometry    (Open Access)
Authors:Liu, Keyang (1); Li, Jinhui (1, 2); Wang, Xinliang (3); Song, Liwei (3); Cao, Huabao (1, 2); Fu, Yuxi (1, 2) 
Author affiliation:(1) XIOPM Center for Attosecond Science and Technology, State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shaanxi, Xi'an; 710119, China; (2) University of Chinese Academy of Science, Beijing; 100049, China; (3) State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai; 201800, China 
Corresponding author:Cao, Huabao(caohuabao@opt.ac.cn)
Source title:Optics Communications
Abbreviated source title:Opt Commun
Volume:541
Issue date:August 15, 2023
Publication year:2023
Article number:129553
Language:English
ISSN:00304018
CODEN:OPCOB8
Document type:Journal article (JA)
Publisher:Elsevier B.V.
Abstract:<div data-language="eng" data-ev-field="abstract">The precise measurement of the shot-to-shot relative arrival time (RAT) for ultrashort pulses in the coherent beam combination (CBC) was experimentally demonstrated by the double-humped interferometry method in our previous work (Liu et al., 2020). However, the optimization of various parameters has not been systematically evaluated, which is significant for practical applications. In this study, we propose an optimization of the parameter settings for high RAT measurement accuracy, which is characterized by the deformation sensitivity and modulation depth of the multi-peak interference pattern. Based on the analytical derivation and numerical simulations, the influence of the parameters including the incidence angle, spectral notch bandwidth, and beam size on the measurement accuracy is studied, which provides a guideline for practical measurement. Moreover, the applicability of double-humped interferometry to the measurement of RAT for chirped pulses is demonstrated experimentally. Thus, double-humped interferometry is suitable for coherent beam combinations of femtosecond pulses, even with a large amount of chirp from various laser systems.<br/></div> &copy; 2023 The Authors
Number of references:45
Main heading:Interferometry
Controlled terms:Electromagnetic pulse - Parameter estimation - Rats
Uncontrolled terms:Arrival time - Coherent beam combinations - Double-humped interferometry - High-accuracy - Measurement accuracy - Measurements of - Optimisations - Precise measurements - Relative arrival time - Ultrashort-pulse
Classification code:701  Electricity and Magnetism - 941.4  Optical Variables Measurements
DOI:10.1016/j.optcom.2023.129553
Funding details:  Number: J21-029-III, Acronym: -, Sponsor: -;Number: S19-020-III, Acronym: -, Sponsor: -;Number: 202005YK01, Acronym: -, Sponsor: -;Number: 12104501,61690222,62175256,92050107, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: J20-021-III, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 2022YFE0111500, Acronym: MOST, Sponsor: Ministry of Science and Technology of the People's Republic of China;Number: 2019JCW-03, Acronym: -, Sponsor: Natural Science Basic Research Program of Shaanxi Province;
Funding text:This work was supported by National Natural Science Foundation of China (NSFC) (Nos.12104501, 62175256, 92050107, 61690222); International Key Research Program of the Ministry of Science and Technology of China (No. 2022YFE0111500); Natural Science Basic Research Program of Shaanxi, China (No. 2019JCW-03); Science and Technology Program of Xi'an, China (No. 202005YK01); Major Science and Technology Infrastructure Pre-research Program of the CAS, China (No. J20-021-III); Key Deployment Research Program of XIOPM, China (No. S19-020-III); Innovation team in Shaanxi Province, China (No. J21-029-III).This work was supported by National Natural Science Foundation of China (NSFC) (Nos. 12104501 , 62175256 , 92050107 , 61690222 ); International Key Research Program of the Ministry of Science and Technology of China (No. 2022YFE0111500 ); Natural Science Basic Research Program of Shaanxi, China (No. 2019JCW-03 ); Science and Technology Program of Xi&rsquo;an, China (No. 202005YK01 ); Major Science and Technology Infrastructure Pre-research Program of the CAS, China (No. J20-021-III ); Key Deployment Research Program of XIOPM, China (No. S19-020-III ); Innovation team in Shaanxi Province, China (No. J21-029-III ).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Hybrid Gold
 
<RECORD 55>
 
Accession number:20230613537963
Title:Optical testing of the primary mirror of the telescope of multispectral high-resolution imaging system
Authors:Li, Jing (1); Sun, Guoyan (1); Xue, Xun (1); Yan, Zhou (1); Zhao, Jianke (1) 
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an; 710119, China 
Corresponding author:Li, Jing(lijing@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12507
Part number:1 of 1
Issue title:Advanced Optical Manufacturing Technologies and Applications 2022; and 2nd International Forum of Young Scientists on Advanced Optical Manufacturing, AOMTA and YSAOM 2022
Issue date:2023
Publication year:2023
Article number:125071R
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510661264
Document type:Conference article (CA)
Conference name:Advanced Optical Manufacturing Technologies and Applications 2022, AOMTA 2022 and 2nd International Forum of Young Scientists on Advanced Optical Manufacturing, YSAOM 2022
Conference date:July 29, 2022  -  July 31, 2022
Conference location:Changchun, China
Conference code:186036
Sponsor:Changchun Institute of Optics, Fine Mechanics and Physics, CAS; Changchun University of Science and Technology; Changchun University of Technology; et al.; Jilin University; University of Shanghai for Science and Technology
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">The multispectral high-resolution imaging system is composed of four wide-spectrum cameras, which can detect targets in the visible, short-wave infrared, medium-wave infrared and long-wave infrared spectrum simultaneously. In order to reduce the size of the system, the four wide-spectrum cameras use the same telescope. To achieve operating wavelengths covering four wavebands, the telescope uses a fully reflective design with a coaxial aspherical surface with a hole in the center of the primary mirror. If aberration-free testing is used, the central aperture will occur, resulting in incomplete aperture of surface shape detection. Thus, in this paper, a compensator is designed which can achieve the whole aperture of surface testing without centralized obscuration. At the same time, the impact of the misalignment of compensator in the optical path during the test is analyzed. The optical testing path adopts infinite conjugate working distance to reduce one adjustment amount of compensator. And the first surface of compensator is coordinated with the interferometer to adjust the angle of compensator quickly and accurately, which further reduces the measurement error introduced by the optical testing path. The design of the compensator can realize the control of sensitive misalignment, reduce the surface measuring error caused by the compensator misalignments, and eventually reduce the precise processing error.<br/></div> &copy; 2023 SPIE.
Number of references:7
Main heading:Imaging systems
Controlled terms:Alignment - Cameras - Errors - Image resolution - Infrared devices - Infrared radiation - Mirrors - Optical systems - Optical testing - Surface measurement  - Telescopes
Uncontrolled terms:Compensator - High-resolution imaging - Infrared spectrum - Longwave infrared - Medium wave - Multi-spectral - Primary mirrors - Sensitive misalignment - Short wave infrared - Wide spectrum
Classification code:601.1  Mechanical Devices - 741.1  Light/Optics - 741.3  Optical Devices and Systems - 742.2  Photographic Equipment - 746  Imaging Techniques - 943.2  Mechanical Variables Measurements
DOI:10.1117/12.2656049
Funding details:  Number: 52105493, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: XAB2019B24, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 4139ZRY4, Acronym: -, Sponsor: China Postdoctoral Science Foundation;
Funding text:This work was supported by the National Natural Science Foundation of China (NSFC) [grant number 52105493], the CAS Light of West China Program [grant number XAB2019B24], and the China Postdoctoral Science Foundation [grant number 4139ZRY4].
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 56>
 
Accession number:20232614323631
Title:Identification of bad pixels in shortwave infrared high-speed hyperspectral imager for spaceborne remote sensing
Title of translation:&#26143;&#36733;&#36965;&#24863;&#30701;&#27874;&#32418;&#22806;&#39640;&#36895;&#39640;&#20809;&#35889;&#25104;&#20687;&#20202;&#22351;&#20687;&#20803;&#35782;&#21035;
Authors:Liu, Yongzheng (1); Du, Jian (1); An, Qinyuning (1); Yang, Fanchao (1); Zhang, Xin (1); Li, Hongbo (1) 
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China 
Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering
Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.
Volume:52
Issue:2
Issue date:February 2023
Publication year:2023
Article number:20220308
Language:Chinese
ISSN:10072276
Document type:Journal article (JA)
Publisher:Chinese Society of Astronautics
Abstract:<div data-language="eng" data-ev-field="abstract">To reduce the influence of bad pixels in large-aperture interferometric imaging shortwave infrared high-speed hyperspectral imagers on recovering spectra, a bad pixel identification template was established using a hyperspectral imager test process to effectively raise the efficiency of identification of bad pixels. First, image data were collected based on the gain template and frame-rate template for the hyperspectral imager test. Then, the judgment threshold Th<inf>1</inf> was set reasonably according to the gain response of normal pixels to identify abnormal pixels under different gains and record the corresponding coordinate values, and the judgment threshold Th<inf>2</inf> was set reasonably according to the frame-rate response gray values of normal pixels to identify abnormal pixels under different frame rates and record the coordinate values. Finally, after the abnormal pixels identified by the gain template and those identified by the frame-rate template were compared, they were used together to identify bad pixels. The experimental results show that the identification method based on the gain and frame-rate templates can effectively identify bad pixels in a shortwave infrared hyperspectral imager detector without increasing the cost of equipment development and testing, while providing an economical, practical, efficient, and reliable technical means for correcting bad pixels in a shortwave infrared hyperspectral imager. The method also offers a useful reference to improve the accuracy of inversion of interferometric imaging hyperspectral imager spectral data.<br/></div> &copy; 2023 Chinese Society of Astronautics. All rights reserved.
Number of references:15
Main heading:Pixels
Controlled terms:Hyperspectral imaging - Image enhancement - Interferometry
Uncontrolled terms:Bad pixel recognition - Bad pixels - Frame-rate - High Speed - Hyperspectral imagers - Interference imaging - Interferometric imaging - Large aperture - Short wave infrared - Spaceborne remote sensing
Classification code:746  Imaging Techniques - 941.4  Optical Variables Measurements
DOI:10.3788/IRLA20220308
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 57>
 
Accession number:20232114130360
Title:Athermalization of Infrared Continuous Zoom Optical System Based on Wavefront Coding
Authors:Kai, Jiang (1, 2); Er-Rui, Chen (1, 2); Liang, Zhou (1, 2); Kai, Liu (1, 2); Jing, Duan (1, 2); Qiusha, Shan (1, 2) 
Author affiliation:(1) The Photoelectric Track and Measurement Technology Research Department, Xi'an Institute of Optics and Precision Mechanics, CAS, Shaanxi, Xi'an; 710119, China; (2) CAS Key Laboratory of Space Precision Measurement Technology, 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:12617
Part number:1 of 1
Issue title:Ninth Symposium on Novel Photoelectronic Detection Technology and Applications
Issue date:2023
Publication year:2023
Article number:1261759
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510664432
Document type:Conference article (CA)
Conference name:9th Symposium on Novel Photoelectronic Detection Technology and Applications
Conference date:April 21, 2023  -  April 23, 2023
Conference location:Hefei, China
Conference code:188142
Sponsor:Chinese Society for Optical Engineering; Science and Technology on Low-light-level Night Vision Laboratory
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">Wavefront coding is a technology which combination of the optical design and digital image processing. By inserting a phase mask closed to the pupil plane of the continuous zoom optical system&#65292;the wavefront of the system is re-modulated. And the depth of focus is extended consequently. In reality the idea is same as the athermalization theory of infrared optical system. In this paper, an uncooled infrared continuous zoom optical system with effective focal as 38mm&#65374;19mm, F number as 1.2, operating wavelength varying from 8&mu;m to 12&mu;m was designed. A cubic phase mask was used at the pupil plane to re-modulate the wavefront. Then the performance of the infrared continuous zoom system was simulated with CODEV as the environment temperature varying from -40&#8451; to 60&#8451;. MTF curve of the optical system with phase mask are compared with the traditional before using phase mask. Decode the image of the coding system, and the result show that wavefront coding technology can make the system not sensitive to thermal defocus, and then realize the athermal design of the infrared optical system.<br/></div> &copy; 2023 SPIE.
Number of references:10
Main heading:Wavefronts
Controlled terms:Image coding - Optical data processing - Optical design - Optical signal processing - Optical systems
Uncontrolled terms:Athermalization - Athernalization - Continuous zooms - Depth-of-focus - Infrared optical systems - Phase masks - Pupil planes - Uncooled Infrared - Wavefront coding - Zoom optical system
Classification code:723.2  Data Processing and Image Processing - 741.1  Light/Optics - 741.3  Optical Devices and Systems
Numerical data indexing:Size 1.90E-02m, Size 3.80E-02m, Size 8.00E-06m to 1.20E-05m
DOI:10.1117/12.2666470
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 58>
 
Accession number:20230613537928
Title:Study on mechanism of action between mirror Surface shape and active force
Authors:Wang, Peng (1); Kang, Shi-Fa (1); Ren, Wang-Tao (1); Zheng, Xiang-Ke (1); Ji, Bin-Dong (1) 
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China 
Corresponding author:Wang, Peng
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12507
Part number:1 of 1
Issue title:Advanced Optical Manufacturing Technologies and Applications 2022; and 2nd International Forum of Young Scientists on Advanced Optical Manufacturing, AOMTA and YSAOM 2022
Issue date:2023
Publication year:2023
Article number:125070I
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510661264
Document type:Conference article (CA)
Conference name:Advanced Optical Manufacturing Technologies and Applications 2022, AOMTA 2022 and 2nd International Forum of Young Scientists on Advanced Optical Manufacturing, YSAOM 2022
Conference date:July 29, 2022  -  July 31, 2022
Conference location:Changchun, China
Conference code:186036
Sponsor:Changchun Institute of Optics, Fine Mechanics and Physics, CAS; Changchun University of Science and Technology; Changchun University of Technology; et al.; Jilin University; University of Shanghai for Science and Technology
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">In this paper, a mirror with 400mm aperture is taken as the research object. A test system and experimental method for the study of the mechanism of action between the surface shape of the mirror and the actuating force are designed. The system is composed of five parts: optical element, the metering type surface shape control device, a stress-strain testing system, a measuring device for the mirror surface shape and a multi-dimensional translation table. Firstly, the support mode of &phi;400mm aperture plane mirror is determined by means of optically integrated analysis technique. Secondly, the design of the metrological surface shape control device is completed. The metrological surface shape control device can realize the micro-stress support of the mirror and provide the initial state for the experimental study. At the same time, the actuator component on the back can test and display the driving force in real time. Thirdly, with the mirror shape as the optimization target and the force applied on the back of the mirror as the control variable, the size of the force can be obtained by using the optic-mechanical integrated analysis technology for simulation optimization. In the experiment, the mirror shape can meet the expected requirements by applying the corresponding tension or pressure through the back actuator. In addition, set up a mirror surface shape - promoting the motivation mechanism research and testing system. The research flow of mirror shape regulation mechanism is put forward, through reflection mirror shape detection, the form data processing, and actuating force calculation, and the power, surface shape control effect assessment, through several rounds of iteration calculation and adjustment, realize the regulation and optimization of reflection mirror. The experimental system and method proposed in this paper provide a theoretical basis for the further study of active control technology of large aperture mirror.<br/></div> &copy; 2023 SPIE.
Number of references:3
Main heading:Mirrors
Controlled terms:Actuators - Data handling - Iterative methods - Optical testing
Uncontrolled terms:Active forces - Adjust and control - Control device - Mechanism of action - Mechanism studies - Mechanism study&#65307; - Mirror shape - Mirror surfaces - Surface shape - Surface shape control
Classification code:723.2  Data Processing and Image Processing - 732.1  Control Equipment - 741.3  Optical Devices and Systems - 921.6  Numerical Methods
Numerical data indexing:Size 4.00E-01m
DOI:10.1117/12.2654254
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 59>
 
Accession number:20231113736020
Title:Label-free and selective cholesterol detection based on multilayer functional structure coated fiber fabry-perot interferometer probe
Authors:Wang, Ruiduo (1, 2); Yan, Minglu (2); Jiang, Man (2); Li, Yang (3); Kang, Xin (4); Hu, Mingxuan (2); Liu, Beibei (2); He, Zhengquan (1); Kong, Depeng (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) State Key Laboratory of Photon-Technology in Western China Energy, International Collaborative Center on Photoelectric Technology and Nano Functional Materials, School of Physics, Institute of Photonics&Photon Technology, Northwest University, Xi'an; 710069, China; (3) Key Laboratory of Aperture Array and Space Application, 38th Research Institute of China Electronics Technology Group Corporation, HeFei; 230000, China; (4) Key Laboratory of Light Field Manipulation and Information Acquisition, Ministry of Industry and Information Technology, and Shaanxi Key Laboratory of Optical Information Technology, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an; 710129, China 
Corresponding authors:Jiang, Man(jmnwu@nwu.edu.cn); Kong, Depeng(kongdp@opt.ac.cn)
Source title:Analytica Chimica Acta
Abbreviated source title:Anal. Chim. Acta
Volume:1252
Issue date:April 29, 2023
Publication year:2023
Article number:341051
Language:English
ISSN:00032670
E-ISSN:18734324
CODEN:ACACAM
Document type:Journal article (JA)
Publisher:Elsevier B.V.
Abstract:<div data-language="eng" data-ev-field="abstract">A reflective fiber-optic Fabry-Perot cavity probe sensor is proposed to selectively measure cholesterol concentration by insert single mode fiber into ceramic tube and immobilize epoxy resin (ER)/graphene oxide (GO)/beta-cyclodextrin (&beta;-CD) multi-layer film onto end face of ceramic tube. EDC/NHS activated GO is selected to form chemical binding with &beta;-CD, and &beta;-CD is the sensitive materials to bind with cholesterol molecules. With multi-layer film assisted, the sensitivity of sensor to cholesterol concentration can reach 3.92 nm/mM and the limit of detection reaches 3.48 &mu; M. In addition, 4 mM hemoglobin, glucose and ascorbic acid are doped into a set cholesterol sample and verified the highly selectivity of sensing cholesterol. Furthermore, the reproducibility was proved by measure the spectrum of four sensors with same fabrication process, and the reusability was also proved by repeated measurements. Overall, the sensor features with high mechanical strength, ease of fabrication, real-time monitoring, low cost and ease for measurement that given by probe structure. Therefore, the sensor provides a remarkable analytical platform for biosensing applications.<br/></div> &copy; 2023 Elsevier B.V.
Number of references:52
Main heading:Graphene
Controlled terms:Ascorbic acid - Cavity resonators - Cholesterol - Epoxy resins - Fabry-Perot interferometers - Fiber optic sensors - Fibers - Probes - Reusability
Uncontrolled terms:Beta-cyclodextrin - Ceramic tubes - Cholesterol detection - Coated fibers - Fabry-Perot cavity - Functional structure - Graphene oxides - Label free - Multi-layer films - &beta;-CD
Classification code:461.2  Biological Materials and Tissue Engineering - 741.1.2  Fiber Optics - 761  Nanotechnology - 804  Chemical Products Generally - 804.1  Organic Compounds - 815.1.1  Organic Polymers - 941.3  Optical Instruments
Numerical data indexing:Size 3.92E-09m, Size 4.00E-03m
DOI:10.1016/j.aca.2023.341051
Funding details:  Number: 2018JM1059, Acronym: -, Sponsor: -;Number: 61535015, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2021JM316, Acronym: -, Sponsor: Natural Science Basic Research Program of Shaanxi Province;
Funding text:Financial support from the National Natural Foundation of China (NSFC) ( 61535015 ), Natural funding from the National Science Basic Research Plan in Shaanxi Province of China ( 2021JM316 ) and the Science and Technology Innovation and Entrepreneurship double tutor project of Shaanxi province ( 2018JM1059 ).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 60>
 
Accession number:20230613537983
Title:A Coaxial Assembling Method of Dual Optical Path System based on Optical Centering Assembling
Authors:Yin, Yamei (1); Lei, Yu (1) 
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shaanxi, Xi'an; 710119, China 
Corresponding author:Yin, Yamei(yinyamei@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12507
Part number:1 of 1
Issue title:Advanced Optical Manufacturing Technologies and Applications 2022; and 2nd International Forum of Young Scientists on Advanced Optical Manufacturing, AOMTA and YSAOM 2022
Issue date:2023
Publication year:2023
Article number:125072L
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510661264
Document type:Conference article (CA)
Conference name:Advanced Optical Manufacturing Technologies and Applications 2022, AOMTA 2022 and 2nd International Forum of Young Scientists on Advanced Optical Manufacturing, YSAOM 2022
Conference date:July 29, 2022  -  July 31, 2022
Conference location:Changchun, China
Conference code:186036
Sponsor:Changchun Institute of Optics, Fine Mechanics and Physics, CAS; Changchun University of Science and Technology; Changchun University of Technology; et al.; Jilin University; University of Shanghai for Science and Technology
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">As the most widely used optical structure, coaxial optical system has become the critical component of many elaborate compound machines. However, with the development of science and technology, aerospace and lithography technology has put forward higher requirements on the imaging quality of ultra-precision coaxial optical system. And the optical axis consistency condition plays a critical role in the system imaging quality. In this paper, the dual optical path system based on light splitting prism is introduced, in which the coaxiality of the dual optical path become a critical issue. For the high coaxiality assembly, the optical centering assembling technology based on optical imaging principle is applied to ensure the coaxiality among the optical axis of optical element, the rotation axis of corresponding machine part and the rotation axis of lathe. According to the optical auto-collimation imaging principle, the visualization and transmission of the main datum of the optical system is completed, which will ensure the datum conversion completed with high precision. Finally, the experiment has been conducted and the coaxiality of the actual dual optical system is better than 0.05mm.<br/></div> &copy; 2023 SPIE.
Number of references:15
Main heading:Optical systems
Controlled terms:Lithography
Uncontrolled terms:Assembling method - Auto-collimation - Coaxial optical systems - Coaxiality - Imaging principle - Imaging quality - Optical centering assembling - Optical centring - Optical path - Rotation axes
Classification code:741.3  Optical Devices and Systems
Numerical data indexing:Size 5.00E-05m
DOI:10.1117/12.2656558
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 61>
 
Accession number:20230613537945
Title:Construction of the optical-mechanical installation and calibration process technology on the basis of the digital twin
Authors:Chou, Xiao-Quan (1); Li, Xiao-Yan (1); Kang, Shi-Fa (1); Yang, Fan (1) 
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shaanxi, Xi'an; 710119, China 
Corresponding author:Chou, Xiao-Quan(chouxiaoquan@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12507
Part number:1 of 1
Issue title:Advanced Optical Manufacturing Technologies and Applications 2022; and 2nd International Forum of Young Scientists on Advanced Optical Manufacturing, AOMTA and YSAOM 2022
Issue date:2023
Publication year:2023
Article number:125070Z
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510661264
Document type:Conference article (CA)
Conference name:Advanced Optical Manufacturing Technologies and Applications 2022, AOMTA 2022 and 2nd International Forum of Young Scientists on Advanced Optical Manufacturing, YSAOM 2022
Conference date:July 29, 2022  -  July 31, 2022
Conference location:Changchun, China
Conference code:186036
Sponsor:Changchun Institute of Optics, Fine Mechanics and Physics, CAS; Changchun University of Science and Technology; Changchun University of Technology; et al.; Jilin University; University of Shanghai for Science and Technology
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">With the continuous development of the technology and informatization, the current research and application of the technology of the digital twin has become a hot spot. The technology of the digital twin is applied to the optical-mechanical system design, the optical-mechanical manufacturing, the optical-mechanical installation and calibration, as well as the inspection over the whole process and the whole life cycle. The objective of this paper is to study the construction of the digital twin in the crucial links of the installation and calibration process over the whole process of the optical-mechanical system, as well as the modeling and simulation of the digital twin in the optical-mechanical installation and calibration process, including the ideal model simulation, the optical-mechanical part-level simulation, the optical-mechanical thermal coupling simulation, the total integration simulation, as well as the prediction of the use effect of the optical-mechanical system. In the past, the ex post data were collected in order to feed back for the model design and the process, so as to improve the accuracy of the simulation. Accordingly, the actual measured data of the optical-mechanical part entity are substituted into the model. Moreover, the results of the simulation integration are used to correct the technical scheme of the process. Furthermore, the physical entity data generated during the execution of the correction scheme are transmitted to the simulation model once again, so as to achieve the dynamic data interactive application of the optical-mechanical system in the physical entity and the virtual model. Thus, the dynamic system is formed. In the end, the data exchange, sharing as well as the mutual mapping between the physical entity and the virtual entity during the installation and calibration of the optical-mechanical system can be realized. In conclusion, the provision of the real-time data, the analysis and optimization of the installation and calibration process, as well as the decision making of the implementation plan in the aspect of the installation and calibration application of the optical-mechanical system, which provide an effective way for the process design of the installation and calibration of the optical-mechanical system as well as the digital improvement of the installation and calibration technology.<br/></div> &copy; 2023 SPIE.
Number of references:12
Main heading:Calibration
Controlled terms:Decision making - Dynamics - Electronic data interchange - Installation - Integration - Life cycle - Machine design
Uncontrolled terms:Assembly technology - Calibration process - Machine systems - Mechanical installation - Mechanical parts - Mechanical systems - Optical machine system - Optical- - Simulation - Whole process
Classification code:601  Mechanical Design - 723.2  Data Processing and Image Processing - 912.2  Management - 921.2  Calculus
DOI:10.1117/12.2655281
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 62>
 
Accession number:20222712304950
Title:Design of compact dual-core terahertz polarization beam splitter with broad bandwidth
Authors:Zheng, Yunqiang (1); Liu, Jinqiu (2); Wang, Yufei (1); Liu, Huan (1); Wang, Wei (1); Xie, Xiaoping (1) 
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Shaanxi, Xi'an, China; (2) School of General Education, Xi'an Technology and Business College, Shaanxi, Xi'an, China 
Corresponding authors:Wang, Wei(wangwei2012@opt.ac.cn); Xie, Xiaoping(xxp@opt.ac.cn); Liu, Jinqiu(jinqiuliu6@foxmail.com)
Source title:Microwave and Optical Technology Letters
Abbreviated source title:Microwave Opt Technol Lett
Volume:65
Issue:5
Issue date:May 2023
Publication year:2023
Pages:1277-1284
Language:English
ISSN:08952477
E-ISSN:10982760
CODEN:MOTLEO
Document type:Journal article (JA)
Publisher:John Wiley and Sons Inc
Abstract:<div data-language="eng" data-ev-field="abstract">A novel dual-core structure based on cyclic olefin copolymer (COC) photonic crystal fiber (PCF) is proposed for realizing Terahertz (THz) polarization beam splitting. The dependence of coupling length and structural parameters of the THz polarization beam splitter (TPBS) is analyzed. The confinement loss, effective material loss, and extinction ratio (ER) are examined. The numerical simulation results show, two orthogonal polarization modes are separated completely within a device length of only 45.16 mm owing to the different coupling length in x- and y-polarization directions. The maximum polarization ER of 107.7 dB is obtained at 0.54 THz. The bandwidth with ER greater than 20 dB reaches 0.02 THz. The proposed compact dual-core TPBS will find extensive applications in THz photonic systems.<br/></div> &copy; 2022 Wiley Periodicals LLC.
Number of references:45
Main heading:Polarization
Controlled terms:Bandwidth - Crystal structure - Crystal whiskers - Optical instruments - Photonic crystal fibers - Prisms
Uncontrolled terms:Broad bandwidths - Core structure - Coupling length - Dual-core - Extinction ratios - Photonic-crystal fiber - Polarization beamsplitters - Polarization-selective devices - Tera Hertz - Terahertz polarization
Classification code:716.1  Information Theory and Signal Processing - 741.1.2  Fiber Optics - 741.3  Optical Devices and Systems - 933.1.1  Crystal Lattice - 941.3  Optical Instruments - 951  Materials Science
Numerical data indexing:Decibel 1.077E+02dB, Decibel 2.00E+01dB, Frequency 2.00E+10Hz, Frequency 5.40E+11Hz, Size 4.516E-02m
DOI:10.1002/mop.33384
Funding details:  Number: XAB2019B22, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 2017YFC0803909, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;
Funding text:This study is supported by the National Key Research and Development Program of China (No. 2017YFC0803909) and CAS "Light of West China" Program (Nos. XAB2019B22).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 63>
 
Accession number:20224112861394
Title:Effect of residual chlorine on fluorescence emission of Dy<sup>3+</sup> doped chalcogenide glasses with low gallium content    (Open Access)
Authors:Cui, Jian (1, 2); Xu, Yantao (1); Xiao, Xusheng (1); Cui, Xiaoxia (1); Liu, Chengzhen (1); Guo, Haitao (1, 2, 3) 
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences (CAS), Xi'an, China; (2) Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, China; (3) Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, China 
Corresponding author:Guo, Haitao(guoht_001@opt.ac.cn)
Source title:Journal of the American Ceramic Society
Abbreviated source title:J Am Ceram Soc
Volume:106
Issue:2
Issue date:February 2023
Publication year:2023
Pages:941-950
Language:English
ISSN:00027820
E-ISSN:15512916
CODEN:JACTAW
Document type:Journal article (JA)
Publisher:John Wiley and Sons Inc
Abstract:<div data-language="eng" data-ev-field="abstract">Chlorine or chlorides are usually used as a dehydrating agent for removing the O-H or S(Se)-H in the preparation of high-purity chalcogenide glasses. However, the residual chlorine in some rare-earth ions doped chalcogenide glasses was found to have a great negative impact on fluorescence emission. In this work, the effect of residual chlorine on the fluorescence emission of Dy<sup>3+</sup> ions in serial (Ge)GaAsSbS glasses was studied quantitatively, and the reasons were discussed. Cl<inf>2</inf> gas and SbCl<inf>3</inf> were used as the source of chlorine and their residual contents were controlled by the post-distillation process and added content, respectively. The results can give some suggestions for how to eliminate the negative effects of chlorine and improve the glass&rsquo; optical gain properties.<br/></div> &copy; 2022 The American Ceramic Society.
Number of references:32
Main heading:Metal ions
Controlled terms:Chalcogenides - Chlorine compounds - Dehydration - Distillation - Fluorescence - Gallium - Gallium compounds - Glass - III-V semiconductors - Optical properties  - Rare earths
Uncontrolled terms:Chalcogenide glass - Dehydrating agents - Fluorescence emission - High purity - Impurity removal - Infrared fluorescences - Mid-infrared fluorescence - Midinfrared - Rare earth ions - Residual chlorines
Classification code:531.1  Metallurgy - 549.3  Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 712.1  Semiconducting Materials - 741.1  Light/Optics - 802.2  Chemical Reactions - 802.3  Chemical Operations - 804.2  Inorganic Compounds - 812.3  Glass
DOI:10.1111/jace.18783
Funding details:  Number: 61935006,62005312,62090065, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: JCTD‐2018‐19, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: IOSKL2020KF11, Acronym: SKLIOE, Sponsor: State Key Laboratory on Integrated Optoelectronics;Number: 2022GY‐423, Acronym: -, Sponsor: Key Research and Development Projects of Shaanxi Province;
Funding text:This work was financially supported by the National Natural Science Foundation of China (62090065, 61935006, and 62005312), the CAS Interdisciplinary Innovation Team project (JCTD-2018-19), the Open Fund of the State Key Laboratory of Integrated Optoelectronics (IOSKL2020KF11), and the Key Research and Development Projects of Shaanxi Province (2022GY-423).This work was financially supported by the National Natural Science Foundation of China (62090065, 61935006, and 62005312), the CAS Interdisciplinary Innovation Team project (JCTD&#8208;2018&#8208;19), the Open Fund of the State Key Laboratory of Integrated Optoelectronics (IOSKL2020KF11), and the Key Research and Development Projects of Shaanxi Province (2022GY&#8208;423).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Bronze
 
<RECORD 64>
 
Accession number:20230713580393
Title:Analytical method for calculating internal stray radiation from an IR spectrometer based on the view factor
Authors:Zhang, Zhi-Nan (1, 2); Li, Li-Bo (1); Hu, Bing-Liang (1); Wang, Peng-Chong (1); Yang, Ying (1); Ke, Shan-Liang (1); Wang, Shuang (1); Li, Si-Yuan (1) 
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology, Xian Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xian; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China 
Corresponding author:Hu, Bing-Liang(hbl@opt.ac.cn)
Source title:Applied Optics
Abbreviated source title:Appl. Opt.
Volume:62
Issue:3
Issue date:January 20, 2023
Publication year:2023
Pages:725-734
Language:English
ISSN:1559128X
E-ISSN:21553165
CODEN:APOPAI
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">Optomechanical components such as the lens barrels and frames of IR spectrometers produce strong internal stray radiation, which reduces the instrument&rsquo;s SNR and dynamic range. An IR internal stray radiation calculation method based on an analytical model of the view factor is proposed. The mathematical model of the view factor calculation method of typical optomechanical components is established. For any IR optical systems, the internal stray radiation can be quickly and accurately calculated by adjusting the coordinate systems in the calculation method. Based on the proposed method, the internal stray radiation of a double-pass long-wave IR spectrometer was calculated. The calculation results are consistent with the simulation results. The RMS value of the relative error between the calculated value and the simulated value is around 11%. To verify the proposed method, an experiment was conducted to test the internal stray radiation of the long-wave IR spectrometer. The internal stray radiation test results agree with the calculated and simulated results, and the relative error between the test results and the calculation results is within 9%.<br/></div> &copy; 2023 Optica Publishing Group.
Number of references:25
Main heading:Stray light
Controlled terms:Optomechanics - Spectrometers
Uncontrolled terms:Analytical method - Calculation results - Dynamic range - Lens barrels - Long wave IR - Optomechanical components - Relative errors - SNR range - Stray radiation - View factor
Classification code:741.1  Light/Optics - 741.3  Optical Devices and Systems - 961  Systems Science
Numerical data indexing:Percentage 1.10E+01%, Percentage 9.00E+00%
DOI:10.1364/AO.478330
Funding details:  Number: 2018YFB0504900, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;
Funding text:Funding. National Key Research and Development Program of China (2018YFB0504900)
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 65>
 
Accession number:20231113734082
Title:The Key Research of High Speed Camera Based on Multiple Core CMOS Sensors
Authors:Li, Yanzhang (1); Zeng, Hong (1); Liu, Guangsen (2); Zhu, Jun (1); Che, Xiaoling (1) 
Author affiliation:(1) DFH Satellite Co., Ltd., Beijing; 10094, China; (2) Xi&rsquo;an Institute of Optics and Precision Mechanics of Cas., Xian; 710119, China 
Corresponding author:Li, Yanzhang(1172783269@qq.com)
Source title:Lecture Notes in Electrical Engineering
Abbreviated source title:Lect. Notes Electr. Eng.
Volume:996 LNEE
Part number:1 of 1
Issue title:Signal and Information Processing, Networking and Computers - Proceedings of the 10th International Conference on Signal and Information Processing, Networking and Computers, ICSINC 2022
Issue date:2023
Publication year:2023
Pages:245-252
Language:English
ISSN:18761100
E-ISSN:18761119
ISBN-13:9789811999673
Document type:Conference article (CA)
Conference name:10th International Conference on Signal and Information Processing, Network and Computers, ICSINC 2022
Conference date:September 6, 2022  -  September 6, 2022
Conference location:Xining, China
Conference code:290819
Publisher:Springer Science and Business Media Deutschland GmbH
Abstract:<div data-language="eng" data-ev-field="abstract">High speed camera is different from traditional remote sensing camera. Object details can be captured through high frame rate imaging. Due to the limited exposure time, the amount of data transmitted and other factors, a single camera cannot achieve the ultra-high frame rate imaging function, and multiple cameras are required to work together. The camera is mainly used for high-speed shooting of moving targets. High frame rate cameras are mainly foreigner design, and domestic cameras are still in their infancy. Especially in the design of a single camera to achieve high frame rate, it is limited by the performance of the CMOS sensor. This paper uses the design of interpolating multiple CMOS sensors into a high frame rate camera, which is not limited by the frame rate of a single CMOS sensor. It only needs the accurate interval exposure of each CMOS sensor, which needs to deal with the exposure synchronization of many CMOS sensors, otherwise the inter-polated high frame rate will be meaningless.<br/></div> &copy; 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.
Number of references:10
Main heading:High speed cameras
Controlled terms:CMOS integrated circuits - Integrated circuit design - Remote sensing
Uncontrolled terms:Accurate interval exposure - Camera-based - CMOS sensors - Core cmos sensor - High frame rate - High frame rate imaging - High Speed - High-speed cameras - Remote sensing cameras - Single cameras
Classification code:714.2  Semiconductor Devices and Integrated Circuits - 742.2  Photographic Equipment
DOI:10.1007/978-981-19-9968-0_29
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 66>
 
Accession number:20232114130605
Title:Small sample learning of calligraphy and painting identification based on hyperspectral image
Authors:Tang, Xingjia (1, 2); Zhang, Pengchang (1); Xu, Zongben (2); Hu, Bingliang (1); Li, Siyuan (1) 
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an; 710119, China; (2) School of Mathematics and Statistics, Xi'an JiaoTong University, Xi'an; 710149, China 
Corresponding author:Tang, Xingjia
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12617
Part number:1 of 1
Issue title:Ninth Symposium on Novel Photoelectronic Detection Technology and Applications
Issue date:2023
Publication year:2023
Article number:126170Y
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510664432
Document type:Conference article (CA)
Conference name:9th Symposium on Novel Photoelectronic Detection Technology and Applications
Conference date:April 21, 2023  -  April 23, 2023
Conference location:Hefei, China
Conference code:188142
Sponsor:Chinese Society for Optical Engineering; Science and Technology on Low-light-level Night Vision Laboratory
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">The existence of forgeries has seriously affected the fair trading, protection and inheritance of calligraphy and painting, while, it been unable to identify high-level counterfeiting means by traditional expert eye identification method. Combining the advantages of material attribute recognition and imaging analysis of hyperspectral imaging technology with the powerful feature expression and classification ability of convolutional neural network, the identification level of calligraphy and painting could be improved. However, there are still some practical problems in the application, like the small sample learning problem caused by the difficulty in obtaining the real hyperspectral sample data of calligraphy and painting. In this paper, a 10-hidden layers 2D-CNN convolutional neural network transfer learning method for calligraphy and painting identification with data enhancement is proposed by using a large number of relevant picture data and a small amount of MNF dimensionality reduced hyperspectral data. The experimental test shows that on the test set of this paper, for the identification of calligraphy and painting authors and authenticity, the accuracy of migration learning with data enhancement under the original sample are separately 97.5% and 94.8%, the accuracy of migration learning with data enhancement under half of the original sample are separately 94.3% and 92.8%, which shows the migration learning and data enhancement is helpful, and the identification accuracy of half of the original sample basically reaches the identification accuracy of the original sample without data enhancement and transfer learning, whose accuracy are 92.1% and 92.5%.<br/></div> &copy; 2023 SPIE.
Number of references:20
Main heading:Convolutional neural networks
Controlled terms:Convolution - Eye protection - Hyperspectral imaging - Learning systems - Multilayer neural networks - Transfer learning
Uncontrolled terms:Calligraphy and painting identification - Convolutional neural network - Data enhancement - HyperSpectral - Hyperspectral image - Original sample - Sample learning - Small sample learning - Small samples - Transfer learning
Classification code:716.1  Information Theory and Signal Processing - 723.4  Artificial Intelligence - 746  Imaging Techniques - 914.1  Accidents and Accident Prevention
Numerical data indexing:Percentage 9.21E+01%, Percentage 9.25E+01%, Percentage 9.28E+01%, Percentage 9.43E+01%, Percentage 9.48E+01%, Percentage 9.75E+01%
DOI:10.1117/12.2663778
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 67>
 
Accession number:20231713946066
Title:Fringe Pattern Orthogonalization Method by Generative Adversarial Nets
Title of translation:&#22522;&#20110; GANs &#32593;&#32476;&#30340;&#26465;&#32441;&#22270;&#27491;&#20132;&#21270;&#26041;&#27861;
Authors:Feng, Leijie (1); Du, Hubing (1); Zhang, Gaopeng (2); Li, Yanjie (1); Han, Jinlu (1) 
Author affiliation:(1) School of Mechatronic Engineering, Xi'an Technological University, Xi'an; 710021, China; (2) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China 
Corresponding author:Zhang, Gaopeng(zhanggaopeng@opt.ac.cn)
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:52
Issue:1
Issue date:January 2023
Publication year:2023
Article number:0112003
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">Optical measurement techniques, such as interferometry, moir&eacute; techniques, and digital holography, are the most popular noncontact approaches for measuring three-dimensional (3D) object surfaces in terms of non-invasive, fast, and accurate evaluation. Usually, the property of the measured quantity is encoded in the phase of the intensity distribution of the fringe pattern, which can be decoded by phase retrieval, in other words, the recovery of a complex-valued signal from the sampled intensity patterns. In this way, phase demodulation of the fringe pattern plays a crucial role in the ubiquitous optical measurements. Among various single frame phase demodulation techniques, the high-frequency fringe pattern demodulation technique, such as Fourier transform profilometry, sampling moir&eacute; method and spatial carrier phase-shifting have been intensively studied and are mainly based on known analytical models of measurement systems, such as harmonic representation of the intensity of fringe patterns. But for low-frequency fringe pattern, phase reconstruction from only a single interferogram is difficult, especially for those including closed fringes. Sign ambiguity during the single-frame demodulation is one of the main problems that impede the development of single-frame interferometry. In this case, fringe pattern orthogonalization plays a very important role in low-frequency fringe pattern phase extraction. However, due to the ill-posed problem of orthogonalization of a single frame fringe pattern, the development of an analytical method for fringe pattern orthogonalizing is full of challenges. In recent years, researchers have demonstrated that deep learning is a powerful machine learning technique that uses artificial neural networks with deep layers to fit complex mathematical functions, thereby, deep learning provides a promising improvement over classical methods derived from explicit analytical formulations of the forward models. More specifically, deep learning approaches handle problems by searching and establishing sophisticated mapping between the input and the target data owing to the powerful computation capability, and therefore may provide a new solution for the phase demodulation of low-frequency fringe pattern. Inspired by recent successful artificial intelligence-based optical imaging applications, in this paper, we propose to utilize the deep learning to solve this problem of under sampling. This paper shows the new phase retrieval method based on deep learning can effectively improve performance and enable new functionalities for fringe profilometry. In the proposed network, the Generative Adversarial Nets areused to generate digitally the phase shifting of original image by combining the prior knowledge of network and fringe pattern denoising normalization. After training on labeled image pairs, the proposed method successfully implemente the desired phase-shifting fringes pattern, which can be viewed as the orthogonal transformation of a fringe pattern. With this Orthogonal transformation network, the wrapped phase can be extracted easily if the sampled fringes pattern is normalized using a trained deep neural network. The validity of the proposed Orthogonal transformation network is demonstrated on both the simulated and experimentally obtained fringe patterns. We also perform a comparative analysis of the proposed and existing approaches. Herein, we conducted fringe pattern denoising-normalization by using a deep-learning-based method developed because of its high-quality reconstruction ability. Thereafter, we input the normalized FP into the proposed Hilbert transformation network to perform Hilbert transform. We demonstrated our approach on both an open and a closed fringe pattern. Indeed, owing to local phase-sign ambiguity, the processed results show that the unwrapped phase map cannot be reconstructed adequately from the existing D4-PS wrapped map, even for a plane. Further, the reference phase from the proposed method is compared with the phase obtained by the multiple-frame high precision phase shift algorithm. Experimental results show that the proposed Orthogonal transformation network can provide a simple and robust solution for optical phase extraction from a single fringe pattern with phase error distribution within 0.05 rad and, therefore, make it allow for paving a new way to measure object 3D profilometry in a transient situation.<br/></div> &copy; 2023 Chinese Optical Society. All rights reserved.
Number of references:21
Main heading:Interferometry
Controlled terms:Complex networks - Deep learning - Demodulation - Learning systems - Optical data processing - Optical variables measurement - Phase modulation
Uncontrolled terms:3-d profile measurements - Deep learning - Fringe pattern - Fringe pattern analysis - Lower frequencies - Orthogonal transformations - Orthogonalization - Orthogonalization of fringe pattern - Phase demodulation - Single frames
Classification code:461.4  Ergonomics and Human Factors Engineering - 722  Computer Systems and Equipment - 723.2  Data Processing and Image Processing - 941.4  Optical Variables Measurements
Numerical data indexing:Absorbed dose 5.00E-04Gy
DOI:10.3788/gzxb20235201.0112003
Funding details:  Number: 51975448, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2022410, Acronym: YIPA CAS, Sponsor: Youth Innovation Promotion Association of the Chinese Academy of Sciences;Number: 2021GY-274, Acronym: -, Sponsor: Shanxi Provincial Key Research and Development Project;
Funding text:National Natural Science Foundation of China(No. 51975448), Key Research and Development Program of Shaanxi Province(No. 2021GY-274), Youth Innovation Promotion Association, CAS(No. 2022410)
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 68>
 
Accession number:20231713946103
Title:Two Step Phase-shifting Interferometry by Least Squares Iterative Optimization
Title of translation:&#22522; &#20110; &#36845; &#20195; &#20248; &#21270; &#30340; &#20004; &#24103; &#38543; &#26426; &#30456; &#31227; &#24178; &#28041; &#26415;
Authors:Liu, Chang (1); Du, Hubing (1); Feng, Leijie (1); Yan, Xingxu (1); Zhang, Gaopeng (2) 
Author affiliation:(1) School of Mechatronic Engineering, Xi'an Technological University, Xi'an; 710021, China; (2) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China 
Corresponding author:Du, Hubing(duhubing@xatu.edu.cn)
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:52
Issue:2
Issue date:February 2023
Publication year:2023
Article number:0212003
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">The temporal phase shifting technique is a powerful tool that is used in numerous industrial&#65292;research and development applications&#65292; such as range acquisition&#65292; industrial inspection&#65292; reverse engineering&#65292;and object recognition. However&#65292;the accuracy of temporal phase shifting technique is limited by the phase-shifting uncertainties resulting from the imperfect conditions in the real testing environments&#65292;such as the miscalibration. So&#65292;there is a strict requirement on the precision of the phase shifter. To remove this requirement&#65292;there have been reported works about phase reconstruction with only two frames. Two-shot phase reconstruction&#65292;i.e.&#65292;the recovery of a complex-valued signal from two intensity patterns that are nearly identical apart from a random and unknown phase shift between them&#65292;which can reconstruct the phase without local sign ambiguity using the minimum number of interferograms with higher measurement accuracy than the single-frame algorithm&#65292;is especially prevalent in imperfect testing conditions where requires reducing the detrimental effects on the measurements from mechanical vibrations&#65292;ambient air turbulence&#65292;and temperature changes. In the implementation of the technique&#65292;the filtering procedure of the fringe normalization&#65292;background removal&#65292;or noise reduction must be applied to the two arbitrarily phase shifted patterns before the phase demodulation. However&#65292;due to certain experimental imperfections of any physical system that are hard to model accurately&#65292;we cannot assume any particular behavior for the intensity pattern in a general case. In this case&#65292;the two-shot phase reconstruction technique may have an unsatisfactory filtering effect during the phase demodulation. Recently&#65292;much special attention is paid to the algorithm that does not require pre-filtering. In this work&#65292; we proposed a novel two-shot phase reconstruction method that can bypass the pre-filtering with the help of the least squares iterative phase shifting algorithm. In our method&#65292;a rough estimation of the phase shift is obtained by correlation operation of two background removed fringe patterns under the approximate orthogonal characteristic of a trigonometric function. Thus&#65292;we can compute the phase using two frame phase shifting algorithm. Then&#65292;using this initial phase shift estimation&#65292;both the phase shift and background light improved by solving other N linear equation systems in a frame-wise manner. Further&#65292;the two background removed fringe patterns are updated. Iterating this process&#65292;it eventually settles down in the searched phase. In essence&#65292;this method is a two-frame version of the AIA algorithm except for the use of background terms&#65292;which is usuallydiscarded in the standard AIA algorithm. To reduce the effect of spatially varying background intensity and modulation amplitude&#65292;we divide the captured interferogram space into several blocks&#65288;for example&#65292;150&times;150&#65289;. if the blocks are sufficiently small&#65292;we may consider that the background intensity and modulation amplitude in each block do not have pixel-to-pixel variation and can be assumed as constants. Then we select one block&#65292;and the necessary parameters are estimated by the phases and the intensity in this block. Our novel approach consists of the following steps&#65306;1&#65289;Estimate an initial phase step by s correlation operation of two background removed fringe patterns&#65292;2&#65289;Compute the measurement phase using the initial phase step&#65292;and 3&#65289;Use the obtained intermediate parameters for continually updating both the two filtered fringe patterns and the phase step until the accurate phase is reconstructed through the searched phase shift. To demonstrate&#65292;the proposed method is compared with other state-of-the-art two-frame random phase-shifting algorithms&#65306; CV and PCA&LSI&#65292; for they can accomplish the phase reconstruction universally and accurately. We choose the typical scenarios&#65292;namely open-fringe pattern&#65292;and closed-fringe pattern as our test case. Both simulations and measurement experiment results obtained using the proposed method indicate that it is a simple&#65292;albeit robust solution for phase extraction from two-frame unknown phase shift fringe pattern.<br/></div> &copy; 2023 Chinese Optical Society. All rights reserved.
Number of references:16
Main heading:Interferometry
Controlled terms:Demodulation - Industrial research - Iterative methods - Least squares approximations - Linear equations - Optical variables measurement - Orthogonal functions - Vibrations (mechanical)
Uncontrolled terms:Fringe pattern - Least Square - Least square iterative phase-shifting algorithm - Phase - Phase shifting Interferometry - Phase-shifting - Phase-shifting algorithm - Random phase shifting - Random-phase - Two-frame phase shifting interferometry
Classification code:901.3  Engineering Research - 912.1  Industrial Engineering - 921  Mathematics - 921.6  Numerical Methods - 931.1  Mechanics - 941.4  Optical Variables Measurements
DOI:10.3788/gzxb20235202.0212003
Funding details:  Number: 51975448, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2022410, Acronym: YIPA CAS, Sponsor: Youth Innovation Promotion Association of the Chinese Academy of Sciences;Number: 2021GY‒274, Acronym: -, Sponsor: Shanxi Provincial Key Research and Development Project;
Funding text:&#65306;National Natural Science Foundation of China&#65288;No. 51975448&#65289;&#65292;the Key Research and Development Program of Shaanxi Province&#65288;No. 2021GY&#8210;274&#65289;&#65292;Youth Innovation Promotion Association&#65292;CAS&#65288;No. 2022410&#65289;
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 69>
 
Accession number:20232514277985
Title:Timing fluctuation correction for the front end of 100-PW laser    (Open Access)
Authors:Li, Hongyang (1, 2, 3); Liu, Keyang (3, 4); Wang, Xinliang (2, 3); Liu, Xingyan (2, 3); Meng, Xianze (2, 3); Liu, Yanqi (2, 3); Song, Liwei (2, 3); Leng, Yuxin (2, 3); Li, Ruxin (2, 3) 
Author affiliation:(1) School of Physics Science and Engineering, Tongji University, Shanghai; 200092, China; (2) State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai; 201800, China; (3) Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing; 100049, China; (4) XIOPM Center for Attosecond Science and Technology, State Key Laboratory of Transient Optics and Photonics, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shaanxi, Xi'an; 710119, China 
Corresponding author:Song, Liwei(slw@siom.ac.cn)
Source title:High Power Laser Science and Engineering
Abbreviated source title:High Power Laser Sci. Eng.
Issue date:2023
Publication year:2023
Language:English
E-ISSN:20523289
Document type:Article in Press
Publisher:Cambridge University Press
Abstract:<div data-language="eng" data-ev-field="abstract">The development of high-intensity ultrafast laser facilities provides the possibility to create novel physical phenomena and matter states. The timing fluctuation of the laser pulses is crucial for the pump-probe experiments, which is one of the vital means to observe the ultrafast dynamics driven by intense laser pulses. In this letter, we demonstrate the timing fluctuation characterization and control of the front end of 100-PW laser which is composed of a high-contrast optical parametric amplifier (seed) and a 200-TW optical parametric chirped pulse amplifier (preamplifier). By combining the timing jitter measurement with a feedback system, the laser seed and preamplifier are synchronized to the reference with timing fluctuation of 1.82 fs and 4.48 fs, respectively. The timing system will be a key prerequisite for the stable operation of 100-PW laser facility and provide the basis for the potential pump-probe experiments performed on the laser.<br/></div> &copy; 2023 Cambridge University Press. All rights reserved.
Number of references:39
Main heading:Timing circuits
Controlled terms:Feedback amplifiers - Laser pulses - Optical parametric amplifiers - Optical pumping - Parametric amplifiers - Probes - Ultrafast lasers
Uncontrolled terms:Front end - High contrast - High intensity - High-intensity ultrafast laser - Intense laser pulse - Laser facilities - Physical phenomena - Pump-probe experiments - Timing fluctuation - Ultra-fast dynamics
Classification code:713.1  Amplifiers - 713.4  Pulse Circuits - 714  Electronic Components and Tubes - 744.1  Lasers, General
Numerical data indexing:Time 1.82E-15s, Time 4.48E-15s
DOI:10.1017/hpl.2023.41
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
 
<RECORD 70>
 
Accession number:20232114130572
Title:Total reflection optical design of AOTF imaging spectrometer
Authors:Chang, Lingying (1); Wang, Xinyou (1); Qiu, Yuehong (2); Wang, Guanru (1); Lv, Yifan (1); Liang, Chi (1); Chen, Kui (1) 
Author affiliation:(1) School of Electronic Engineering, Xi'an University of Posts and Telecommunications, Xi'an; 710121, China; (2) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an; 710119, China 
Corresponding author:Chang, Lingying(sophia_chang@126.com)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12617
Part number:1 of 1
Issue title:Ninth Symposium on Novel Photoelectronic Detection Technology and Applications
Issue date:2023
Publication year:2023
Article number:126173O
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510664432
Document type:Conference article (CA)
Conference name:9th Symposium on Novel Photoelectronic Detection Technology and Applications
Conference date:April 21, 2023  -  April 23, 2023
Conference location:Hefei, China
Conference code:188142
Sponsor:Chinese Society for Optical Engineering; Science and Technology on Low-light-level Night Vision Laboratory
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">A total reflection optical system of AOTF (acousto-optic tunable filters) imaging spectrometer was designed, which adopts the confocal scheme, consisting of the front lens, AOTF and projection lens. AOTF is the field stop of the optical system. Both subsystems are quasi-telecentric systems that can effectively eliminate the parallax when the subsystems are connected and facilitate the installation of the system. The initial structural parameters are determined by the third-order aberration theory of the coaxial three-mirror optical system. This off-axis total reflection optical system is unobstructed by adding the field of view off-axis, tilt, and decentration, with a spectral range of 0.4-1.7&mu;m, a focal length of 150mm, and a full field of view of 4.68&deg;. The simulation result is shown that the modulation transfer function (MTF) is greater than 0.54 in the 0.4-1.7&mu;m band, which is close to the diffraction limit, and the systematic distortion value is less than 0.1%.<br/></div> &copy; 2023 SPIE.
Number of references:18
Main heading:Mirrors
Controlled terms:Diffraction - Electromagnetic wave reflection - Geometrical optics - Lenses - Optical design - Optical systems - Spectrometers
Uncontrolled terms:Acoustooptic tunable filters (AOTF) - Coaxial three mirrors - Field of views - Imaging spectrometers - Projection lens - Structural parameter - Telecentric system - Third order aberration theory - Three-mirror anastigmatic - Total reflection
Classification code:711  Electromagnetic Waves - 741.1  Light/Optics - 741.3  Optical Devices and Systems
Numerical data indexing:Percentage 1.00E-01%, Size 1.3716E-02m, Size 1.50E-01m, Size 4.00E-07m to 1.70E-06m
DOI:10.1117/12.2666109
Funding details:  Number: 61475190, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:National Natural Science Foundation of China (61475190).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 71>
 
Accession number:20232114130500
Title:Analysis of GEO Space Debris Detection Based on Near-GEO Orbit RPO
Authors:Cui, Kai (1, 2); Wang, Feng (1); She, Wen-Ji (1, 2); Liu, Zhao-Hui (1, 2); Li, Zhi-Guo (1, 2); Chen, Rong-Li (1) 
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, CAS, Xi'An; 710119, China; (2) Key Laboratory of Space Precision Measurement Technology, 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:12617
Part number:1 of 1
Issue title:Ninth Symposium on Novel Photoelectronic Detection Technology and Applications
Issue date:2023
Publication year:2023
Article number:126174Q
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510664432
Document type:Conference article (CA)
Conference name:9th Symposium on Novel Photoelectronic Detection Technology and Applications
Conference date:April 21, 2023  -  April 23, 2023
Conference location:Hefei, China
Conference code:188142
Sponsor:Chinese Society for Optical Engineering; Science and Technology on Low-light-level Night Vision Laboratory
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">The America and Russia set their new space surveillance and detection equipment s to the near GEO orbit, and frequently conducted rendezvous and proximity operations(RPO) tests, which may pose great threats to our effect in protecting the precious GEO satellite assets. But the satellites&#8223; operator schema, the satellites&#8223; on-orbit status modes were kept secret by the owners, it was difficult for others to acquire detailed information. Firstly both the America and Russia space surveillance system capacities were investigated and summarized. Secondly, taking the distribution characteristics of GEO debris in mind, simulations were conducted based on the near GEO orbit dynamics and few satellite orbit data, to deduce the satellites trace during the valid TLE intervals. The accuracy verification was checked by the "classified" information disclosed mutually by the America and Russia. Finally, the similarities and differences between the American and Russian near GEO satellites were summarized, and suggestions were towed out when using the near-GEO orbit. According to the suggestion, for a near GEO surveillance equipment, it was proper to take enough flue to pushing themselves for more than 2000km, and was better to satay in every near-GEO orbit for more than 20 days when performing the RPO tests.<br/></div> &copy; 2023 SPIE.
Number of references:14
Main heading:Orbits
Controlled terms:Satellites - Space debris - Space rendezvous - Space surveillance
Uncontrolled terms:GEO satellites - GEO space debris detection - Near-GEO - Operation tests - Orbit rendezvous - Orbital dynamics - Orbital maneuvers - Proximity operations - Rendezvous and proximity operation - Surveillance equipment
Classification code:655.2  Satellites - 656.1  Space Flight - 656.2  Space Research
Numerical data indexing:Age 5.48E-02yr, Size 2.00E+06m
DOI:10.1117/12.2666383
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 72>
 
Accession number:20230813600606
Title:Design of Wide-range and Multi-spectral TDI-CMOS Imaging System
Authors:Yang, Yang (1, 2); Bo, Zhu (1); Hong, Wang (1); Pei, Yao (1) 
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Science, Shaanxi, Xi'an; 710119, China; (2) Shaanxi Normal University, Shaanxi, Xi'an; 710119, China 
Corresponding author:Bo, Zhu(zhubo@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12557
Part number:1 of 1
Issue title:AOPC 2022: Optical Sensing, Imaging, and Display Technology
Issue date:2023
Publication year:2023
Article number:125571J
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510662285
Document type:Conference article (CA)
Conference name:2022 Applied Optics and Photonics China: Optical Sensing, Imaging, and Display Technology, AOPC 2022
Conference date:December 18, 2022  -  December 19, 2022
Conference location:Virtual, Online, China
Conference code:186412
Sponsor:Chinese Society for Optical Engineering (CSOE)
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">As the need for image resolution, transmission rate, and integration rises in space remote sensing applications, the charge accumulation-based TDI-CMOS sensor devices evolve fast. This study proposes a TDI-CMOS imaging system based on FPGA to answer the challenge of high-resolution, wide-format multispectral imaging. First, the device selection and stitching design ideas are clarified based on the index requirements of the imaging system; second, the design techniques of the TDI-CMOS imaging system are emphasized, and the implementation methods of critical technologies such as TDI-CMOS timing drive, register configuration, P-spectrum, and B-spectrum image data training, and high-speed data interface design of the imaging system are illustrated; third, the relevant experimental work is described. In conclusion, the experimental work is described, and the experimental findings are examined and interpreted. The experimental findings demonstrate that the imaging system has a signal-to-noise ratio of 45 dB for P-spectrum and 55 dB for B-spectrum and that the resolution of picture elements is 8288 columns for P-spectrum and 2072 columns for B-spectrum.<br/></div> &copy; 2023 SPIE.
Number of references:5
Main heading:Field programmable gate arrays (FPGA)
Controlled terms:CMOS integrated circuits - Digital storage - Image resolution - Imaging systems - Integrated circuit design - Remote sensing - Signal to noise ratio
Uncontrolled terms:Array sensors - CMOS imaging - Large arrays - Large-array sensor - Multi-spectral - Remote sensing applications - Space remote sensing - Spectra's - Transmission rates - Wide-range
Classification code:714.2  Semiconductor Devices and Integrated Circuits - 716.1  Information Theory and Signal Processing - 721.2  Logic Elements - 722.1  Data Storage, Equipment and Techniques - 746  Imaging Techniques
Numerical data indexing:Decibel 4.50E+01dB, Decibel 5.50E+01dB
DOI:10.1117/12.2651685
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 73>
 
Accession number:20230613537976
Title:Research on nonlinear relationship between rotation speed and material removal in wheel polishing technology
Authors:Yao, Yongsheng (1, 2); Li, Qixin (1); Jiang, Xiangmin (1); Ding, Jiaoteng (1); Ma, Zhen (1); Fan, Xuewu (1) 
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, CAS, Xi'an; 710119, China; (2) University of Chinese Academy of Science, Beijing; 100049, China 
Corresponding author:Yao, Yongsheng(ganglangyao@126.com)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12507
Part number:1 of 1
Issue title:Advanced Optical Manufacturing Technologies and Applications 2022; and 2nd International Forum of Young Scientists on Advanced Optical Manufacturing, AOMTA and YSAOM 2022
Issue date:2023
Publication year:2023
Article number:125072E
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510661264
Document type:Conference article (CA)
Conference name:Advanced Optical Manufacturing Technologies and Applications 2022, AOMTA 2022 and 2nd International Forum of Young Scientists on Advanced Optical Manufacturing, YSAOM 2022
Conference date:July 29, 2022  -  July 31, 2022
Conference location:Changchun, China
Conference code:186036
Sponsor:Changchun Institute of Optics, Fine Mechanics and Physics, CAS; Changchun University of Science and Technology; Changchun University of Technology; et al.; Jilin University; University of Shanghai for Science and Technology
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">The classical Preston equation considers that the material removal is linearly related to time, velocity, and pressure. However, in the wheel polishing technology, it is found through experiments that there is a nonlinear relationship between the rotational speed of the polishing wheel and the amount of material removed. In order to accurately control the material removal in the polishing wheel variable speed machining strategy, it is necessary to modify the classical Preston equation. In this paper, the control variable method is used to carry out the sampling experiment: the time and pressure are set as fixed values, and the polishing wheel speed is set as a variable and the value is between 0-4rps. Then the data points were analyzed and a least squares fit was used to obtain a non-linear function between the rotational speed of the polishing wheel and the amount of material removed. Finally, the classical Preston equation is modified to obtain the removal equation suitable for the variable speed machining strategy.<br/></div> &copy; 2023 SPIE.
Number of references:13
Main heading:Wheels
Controlled terms:Polishing
Uncontrolled terms:Machining strategy - Material removal - Non-linear relationships - Polishing technology - Polishing wheels - Preston equations - Rotation speed - Rotational speed - Variable speed - Wheel polishing
Classification code:601.2  Machine Components - 604.2  Machining Operations
DOI:10.1117/12.2656447
Funding details:  Number: -, Acronym: YIPA CAS, Sponsor: Youth Innovation Promotion Association of the Chinese Academy of Sciences;
Funding text:This work is supported by Youth Innovation Promotion Association CAS.
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 74>
 
Accession number:20230713574400
Title:Multispectral image registration parameter calibration method based on pyramid mixture model
Authors:Gao, Xingli (1, 2); Xue, Bin (1) 
Author affiliation:(1) Xi an Institute of Optics and Precision Mechanics of Chinese Academy of Science, Shaanxi, Xi'an; 710119, China; (2) Shaanxi Normal University, Xi an, Shaanxi; 710119, China 
Corresponding author:Xue, Bin(xuebin@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12558
Part number:1 of 1
Issue title:AOPC 2022: Optical Spectroscopy and Imaging
Issue date:2023
Publication year:2023
Article number:125580E
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510662308
Document type:Conference article (CA)
Conference name:2022 Applied Optics and Photonics China: Optical Spectroscopy and Imaging, AOPC 2022
Conference date:December 18, 2022  -  December 19, 2022
Conference location:Virtual, Online, China
Conference code:186190
Sponsor:Chinese Society for Optical Engineering (CSOE)
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">With unique properties, multispectral cameras have become a hot research direction in recent years. In our country's major space mission "Mars Exploration Project", the multispectral camera was mounted on the "Zhu Rong"rover as an important payload to complete a number of exploration missions. Due to the optical structure of the multispectral camera and other reasons, there are often deviations such as rotation, scale change, and displacement between the images of each channel. For multispectral images, there may be huge differences between the image grayscales of different channels. For the same target subject, the local grayscale contrast may even be opposite. Therefore, the conventional image registration method is difficult to solve the alignment issue between the subjects in each channel. In this paper, a calibration method based on a pyramid mixture model of the circular templet is proposed, and a set of accurate calibration parameters is obtained by using the templet images, so as to complete the channel registration of the Mars multispectral image. At the same time, based on the particularity of the template images, an objective evaluation criterion of geometric calibration is proposed.<br/></div> &copy; COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.
Number of references:11
Main heading:Image registration
Controlled terms:Calibration - Cameras - Martian surface analysis - Rovers
Uncontrolled terms:Calibration method - Distortions corrections - Gray scale - Images registration - Mars exploration - Mixture modeling - Multispectral cameras - Multispectral images - Parameters calibrations - Property
Classification code:655.1  Spacecraft, General - 723.2  Data Processing and Image Processing - 742.2  Photographic Equipment
DOI:10.1117/12.2651499
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 75>
 
Accession number:20232114130526
Title:Sensitivity analysis of pointing error sources for periscope terminals
Authors:Leyi, Xi (1, 2); Junfeng, Han (1, 2) 
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, CAS, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China 
Corresponding author:Junfeng, Han(hanjf@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12617
Part number:1 of 1
Issue title:Ninth Symposium on Novel Photoelectronic Detection Technology and Applications
Issue date:2023
Publication year:2023
Article number:126175R
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510664432
Document type:Conference article (CA)
Conference name:9th Symposium on Novel Photoelectronic Detection Technology and Applications
Conference date:April 21, 2023  -  April 23, 2023
Conference location:Hefei, China
Conference code:188142
Sponsor:Chinese Society for Optical Engineering; Science and Technology on Low-light-level Night Vision Laboratory
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">Aiming at the deviation of the actual light emission direction of the periscope terminal system from the theoretical light emission direction, the optical axis pointing model of the periscope laser communication terminal was established based on the multi-body system theory, and the influence of the mechanical axis system error and the optical axis system error on the pointing model was analyzed, and through the analysis of the sensitivity of the pointing error factors, the error with the greatest influence on the final apparent axis error was obtained as the elevation axis system error. followed by the slope angle error and wedge angle error of the azimuth 45&deg; plane mirror and azimuth axis system error, which provides a basis for the correction of pointing errors.<br/></div> &copy; 2023 SPIE.
Number of references:6
Main heading:Sensitivity analysis
Controlled terms:Errors - Laser theory - Light emission - Optical communication - Optical instruments
Uncontrolled terms:Angle errors - Error sources - Laser communication terminals - Multi-body system theories - Optical axis - Periscopic terminal - Pointing errors - Pointing models - System errors - Terminal systems
Classification code:717.1  Optical Communication Systems - 741.1  Light/Optics - 744.1  Lasers, General - 921  Mathematics - 941.3  Optical Instruments
DOI:10.1117/12.2666613
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 76>
 
Accession number:20232114130633
Title:Design and tolerance analysis of multispectral infrared off-axis three mirror optical system
Authors:Chenfeng, Wang (1, 2); Weiguo, Lu (1) 
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, CAS, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China 
Corresponding author:Weiguo, Lu(luweiguo@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12617
Part number:1 of 1
Issue title:Ninth Symposium on Novel Photoelectronic Detection Technology and Applications
Issue date:2023
Publication year:2023
Article number:126175Y
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510664432
Document type:Conference article (CA)
Conference name:9th Symposium on Novel Photoelectronic Detection Technology and Applications
Conference date:April 21, 2023  -  April 23, 2023
Conference location:Hefei, China
Conference code:188142
Sponsor:Chinese Society for Optical Engineering; Science and Technology on Low-light-level Night Vision Laboratory
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">In the field of infrared detection, as the application scenarios become more and more complex, the infrared optical system of a single band is limited by the impact of the detection environment, resulting in too little information received, which can no longer meet the detection requirements. Multispectral detection becomes the future research hotspots of such optical systems. Taken advantage of the basic principle of the Gaussian optics and the primary aberration theory, an off-axis three mirror optical system is devised to avoid the central occlusion and improve the energy utilization. The simulation results show that the full field modulation transfer function at the spatial frequency of 20lp/mm in the 4.2~4.45&mu;m band is greater than 0.6, and the MTF of 20lp/mm in the 5.8~7.3&mu;m band is greater than 0.5. In addition, reasonable allocation of system tolerance will greatly affect the imaging capability of the system. Using tolerance sensitivity analysis and inversion sensitivity analysis, calculate the impact of each tolerance on the imaging performance of the system, and reasonably allocate the tolerance. After simulation analysis, the MTF of the system is greater than 0.4 according to the given common error processing and assembly.<br/></div> &copy; 2023 SPIE.
Number of references:6
Main heading:Optical design
Controlled terms:Energy utilization - Fits and tolerances - Mirrors - Optical systems - Sensitivity analysis
Uncontrolled terms:Application scenario - Design Analysis - Dual Band - Infrared detection - Infrared systems - Multispectral infrared - Off-axis - Off-axis three mirror - Off-axis three mirror optical system - Tolerance analysis
Classification code:525.3  Energy Utilization - 741.1  Light/Optics - 741.3  Optical Devices and Systems - 921  Mathematics
Numerical data indexing:Size 4.20E-06m to 4.45E-06m, Size 5.80E-06m to 7.30E-06m
DOI:10.1117/12.2666631
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 77>
 
Accession number:20232614311952
Title:Design of all-sky airglow imaging spectrometers in the middle and upper atmosphere
Authors:Li, Xijie (1); Li, Yong (1); Fu, Di (1); Feng, Yutao (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 
Corresponding author:Li, Xijie(lixijie@opt.ac.cn)
Source title:Optik
Abbreviated source title:Optik
Volume:287
Issue date:September 2023
Publication year:2023
Article number:171087
Language:English
ISSN:00304026
Document type:Journal article (JA)
Publisher:Elsevier GmbH
Abstract:<div data-language="eng" data-ev-field="abstract">In order to detect the distribution of gravity waves in the middle and upper atmosphere, an all-sky airglow imaging spectrometer is designed to measure the airglow. It has the detection advantages of ultrawide field of view (FOV), large relative aperture and high signal-to-noise ratio (SNR). It can obtain the spectral images of OH (715&ndash;850 nm / 880&ndash;930 nm) and OI (630 nm) in the height range of 87&ndash;250 km. The whole design method of telecentric objective splicing relay zoom group is used to effectively suppress the spectral drift less than 0.2 nm, which meets the requirements of narrow bandwidth filters. The field experiments in northwest China show that the all-sky airglow imaging spectrometer can continuously acquire airglow spectral images with high SNR in both OH channel and OI channel without focusing in the temperature range of 0&ndash;45 &#8451;, and the images obtained in OH channel have obvious gravity wave phenomenon after star point removal and geometric correction.<br/></div> &copy; 2023 Elsevier GmbH
Number of references:20
Main heading:Gravity waves
Controlled terms:Design - Signal to noise ratio - Spectrometers - Upper atmosphere
Uncontrolled terms:Airglow imaging spectrometer - All-sky - Design method - Fish-eye lens - Gravity wave phenomenon - High signal-to-noise ratio - Imaging spectrometers - Spectral images - Ultra-wide - Wave phenomena
Classification code:443.1  Atmospheric Properties - 716.1  Information Theory and Signal Processing - 741.3  Optical Devices and Systems - 931.5  Gravitation, Relativity and String Theory
Numerical data indexing:Size 2.00E-10m, Size 6.30E-07m, Size 7.15E-07m to 8.50E-07m, Size 8.70E+04m to 2.50E+05m, Size 8.80E-07m to 9.30E-07m
DOI:10.1016/j.ijleo.2023.171087
Funding details:  Number: 2019JQ-931, Acronym: -, Sponsor: Natural Science Basic Research Program of Shaanxi Province;Number: 41005019, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: XAB 2016A07, Acronym: -, Sponsor: West Light Foundation of the Chinese Academy of Sciences;Number: YJKYYQ20210021, Acronym: CAS, Sponsor: Chinese Academy of Sciences;
Funding text:This work was supported by the National Natural Science Foundation of China (No. 41005019), West Light Foundation of Chinese Academy of Sciences (No. XAB 2016A07), Natural Science Basic Research Program of Shaanxi Province (No. 2019JQ-931), West Light Cross-Disciplinary Innovation team of Chinese Academy of Sciences (No. E1294301), Supported by research instrument and equipment development project of Chinese Academy of Sciences (No.YJKYYQ20210021).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 78>
 
Accession number:20230413411340
Title:Reversible lateral optical force on phase-gradient metasurfaces for full control of metavehicles
Authors:Li, Tianyue (1); Kingsley-Smith, Jack J. (2); Hu, Yanhui (2); Xu, Xiaohao (3, 4); Yan, Shaohui (3, 5); Wang, Shuming (1, 6); Yao, Baoli (3, 5); Wang, Zhenlin (1); Zhu, Shining (1, 6) 
Author affiliation:(1) National Laboratory of Solid-State Microstructures, Collaborative Innovation Center for Advanced Microstructures, School of Physics, Nanjing University, Nanjing; 210093, China; (2) Department of Physics, London Centre for Nanotechnology, King's College London, London; WC2R 2LS, United Kingdom; (3) State Key Laboratory of Transient Optics, Photonics Xi'an Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences (CAS), Xi'an; 710119, China; (4) Institute of Nanophotonics, Jinan University, Guangzhou; 511443, China; (5) University of Chinese Academy of Sciences, Beijing; 100049, China; (6) Key Laboratory of Intelligent Optical Sensing and Manipulation, Ministry of Education, Nanjing; 210093, China 
Source title:Optics Letters
Abbreviated source title:Opt. Lett.
Volume:48
Issue:2
Issue date:January 15, 2023
Publication year:2023
Pages:255-258
Language:English
ISSN:01469592
E-ISSN:15394794
CODEN:OPLEDP
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">Photonics is currently undergoing an era of miniaturization thanks in part to two-dimensional (2D) optical metasurfaces. Their ability to sculpt and redirect optical momentum can give rise to an optical force, which acts orthogonally to the direction of light propagation. Powered by a single unfocused light beam, these lateral optical forces (LOFs) can be used to drive advanced metavehicles and are controlled via the incident beam's polarization. However, the full control of a metavehicle on a 2D plane (i.e. forward, backward, left, and right) with a sign-switchable LOF remains a challenge. Here we present a phase-gradient metasurface route for achieving such full control while also increasing efficiency. The proposed metasurface is able to deflect a normally incident plane wave in a traverse direction by modulating the plane wave's polarization, and results in a sign-switchable recoil LOF. When applied to a metavehicle, this LOF enables a level of motion control that was previously unobtainable.<br/></div> &copy; 2023 Optica Publishing Group.
Number of references:45
Main heading:Wave propagation
Controlled terms:Elastic waves - Incident light - Polarization
Uncontrolled terms:Full control - Light beam - Metasurface - Miniaturisation - Optical force - Optical- - Phase gradient - Plane wave - Switchable - Two-dimensional
Classification code:741.1  Light/Optics - 931.1  Mechanics
DOI:10.1364/OL.478979
Funding details:  Number: 11621091,11774162,11774164,11804119,11822406,12274181, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:Funding. National Natural Science Foundation of China (12274181, 11621091, 11774162, 11774164, 11804119, 11822406).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 79>
 
Accession number:20230187573
Title:Evaporation characteristics of Er<sup>3+</sup>doped silica fiber and its application in the preparation of whispering gallery mode lasers
Authors:Li, Angzhen (1); Ward, Jonathan M. (2); Tian, Ke (3); Yu, Jibo (4); She, Shengfei (5); Hou, Chaoqi (5); Guo, Haitao (5); Chormaic, S&iacute;le Nic (6); Wang, Pengfei (3) 
Author affiliation:(1) Tianjin Key Laboratory of Quantum Optics and Intelligent Photonics, School of Science, Tianjin University of Technology, Tianjin; 300384, China; (2) Physics Department, University College Cork, Cork, Ireland; (3) Key Laboratory of In-Fiber Integrated Optics of Ministry of Education, Harbin Engineering University, Harbin; 150001, China; (4) Xi'an Institute of Applied Optics, Xi&rsquo;an; 710065, China; (5) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi&rsquo;an; 710119, China; (6) Okinawa Institute of Science and Technology, Graduate University, Okinawa, Onna; 904-0495, Japan 
Corresponding authors:Wang, Pengfei(pengfei.wang@tudublin.ie); Chormaic, S&iacute;le Nic(sile.nicchormaic@oist.jp)
Source title:arXiv
Abbreviated source title:arXiv
Issue date:May 12, 2023
Publication year:2023
Language:English
E-ISSN:23318422
Document type:Preprint (PP)
Publisher:arXiv
Abstract:<div data-language="eng" data-ev-field="abstract">The fabrication of whispering gallery lasers (WGL) is used to experimentally evaluate the evaporation rate (mol/&mu;m) and ratio (mol/mol) of erbium and silica lost from a doped fiber during heating. Fixed lengths of doped silica fiber are spliced to different lengths of undoped fiber and then evaporated by feeding into the focus of a CO<inf>2</inf>laser. During evaporation, erbium ions are precipitated in the doped silica fiber to control the erbium concentration in the remaining SiO<inf>2</inf>, which is melted into a microsphere. By increasing the length of the undoped section, a critical point is reached where effectively no ions remain in the glass microsphere. The critical point is found using the lasing spectra of the whispering gallery modes in microspheres with equal sizes. From the critical point, it is estimated that, for a given CO<inf>2</inf>laser power, 6.36 &times; 10<sup>-21</sup>mol of Er<sup>3+</sup>is lost during the evaporation process for every cubic micron of silica fiber. This is equivalent to 1.74 &times; 10<sup>-7</sup>mol of Er<sup>3+</sup>lost per mol of SiO<inf>2</inf>evaporated. This result facilitates the control of the doping concentration in WGLs and provides insight into the kinetics of laser-induced evaporation of doped silica.<br/></div> Copyright &copy; 2023, The Authors. All rights reserved.
Number of references:33
Main heading:Silica
Controlled terms:Erbium - Evaporation - Fibers - Metal ions - Microspheres - Optical resonators - Rare earths - Whispering gallery modes
Uncontrolled terms:CO 2 laser - Doped silicas - Evaporation rate - Fiber applications - ITS applications - Microsphere resonators - Rare earth ions - Silica fibers - Whispering gallery - Whispering gallery mode lasers
Classification code:531.1  Metallurgy - 547.2  Rare Earth Metals - 714.3  Waveguides - 741.3  Optical Devices and Systems - 802.3  Chemical Operations - 804.2  Inorganic Compounds
Numerical data indexing:Amount of substance 1.74E-07mol, Amount of substance 6.36E-21mol
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.Preprint ID:2305.07527v1
Preprint source website:https://arxiv.org
Preprint ID type:ARXIV
 
 
<RECORD 80>
 
Accession number:20230813600475
Title:Dynamical analysis and structural optimisation of angular contact ball bearing
Authors:Luo, Shan (1, 2); Li, Zhiguo (1, 2); Cheng, Zhiyuan (1, 2) 
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:Li, Zhiguo(lzg@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12557
Part number:1 of 1
Issue title:AOPC 2022: Optical Sensing, Imaging, and Display Technology
Issue date:2023
Publication year:2023
Article number:1255731
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510662285
Document type:Conference article (CA)
Conference name:2022 Applied Optics and Photonics China: Optical Sensing, Imaging, and Display Technology, AOPC 2022
Conference date:December 18, 2022  -  December 19, 2022
Conference location:Virtual, Online, China
Conference code:186412
Sponsor:Chinese Society for Optical Engineering (CSOE)
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">Spaceborne two-dimensional turntable is the main carrier of the space camera and other optoelectronic equipment, and the stability of the thin-walled angular contact ball bearings used in its shaft system will affect the control accuracy and service life of the satellite. Research on slip rate, the deviation ratio of centroid whirl velocity and vibration of bearing with different pocket clearances, outer clearances and velocity and axial loads. For 71928AC type angular contact ball bearing, when pocket clearance is between 0.30-0.40mm, outer clearance is 1.60mm, the cage of bearing has better stability. According to the experimental results, after the parameter optimization, the bearing stability is enhanced. The research results provide a theoretical basis for the optimal design of angular contact ball bearing cages.<br/></div> &copy; 2023 SPIE.
Number of references:9
Main heading:Stability
Controlled terms:Structural optimization - Thin walled structures
Uncontrolled terms:Cage slip - Cage slip rate - Dynamical analysis - Dynamics simulation - Slip rates - Space cameras - Space-borne - Structural optimisations - Thin-walled - Two-dimensional turntables
Classification code:921.5  Optimization Techniques
Numerical data indexing:Size 1.60E-03m, Size 3.00E-04m to 4.00E-04m
DOI:10.1117/12.2652154
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 81>
 
Accession number:20230813600535
Title:An efficient wide area imaging scheme based on spiral scanning
Authors:Chang, Sansan (1, 2); Li, Xiang (1); Yang, Kai (3) 
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 Technological University, Xi'an; 710021, China 
Corresponding author:Chang, Sansan(changsansan@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12557
Part number:1 of 1
Issue title:AOPC 2022: Optical Sensing, Imaging, and Display Technology
Issue date:2023
Publication year:2023
Article number:125572O
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510662285
Document type:Conference article (CA)
Conference name:2022 Applied Optics and Photonics China: Optical Sensing, Imaging, and Display Technology, AOPC 2022
Conference date:December 18, 2022  -  December 19, 2022
Conference location:Virtual, Online, China
Conference code:186412
Sponsor:Chinese Society for Optical Engineering (CSOE)
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">There are three common scanning schemes for large area imaging for airborne camera-multi lens splicing, circumferential scanning or reciprocating scanning. However, the lens splicing form requires multiple lenses, and the system is cumbersome. The circumferential scanning imaging obtains a wide area image through azimuth continuous scanning and the field of view in the pitching direction of this imaging method is a fixed value. And the imaging efficiency of reciprocating scanning form is low due to the need for multiple mechanism turns. In this paper, a new spiral scanning scheme method over large area imaging is proposed, which carries the area array camera on the two-dimensional platform with external azimuth gimbal and internal pitch gimbal. Scanning in azimuth combined with pitch motion, the spiral scanning trail is composed for wide-area imaging, and this method requires only one area array camera and only one rotation in pitch direction in one imaging process, which has high imagery efficiency. At the same time, the spiral dynamic scanning algorithm which can isolate attitude disturbance and compensate flight movement to achieve the scanning imaging for large area of the specified area is deduced. Then the implementation form of the scanning method is also derived. Finally, we take some simulation to test the method. The results show that the spiral scanning algorithm can compensate the attitude disturbance and aircraft attitude disturbance, and can obtain the staring imaging of 254km<sup>2</sup> (mapping radius of 9km) in 3.8 seconds, when the field of view angle of area array camera is 7.5 &deg;&times;11.25 &deg;, the flight speed is 360km/h, the azimuth attitude disturbance is 15 &deg;, the pitch attitude disturbance is 15 &deg;, and the roll attitude disturbance is 8 &deg;, at the flight altitude of 7500m. Therefore, the spiral scanning algorithm scheme is suitable for wide area imaging of moving carrier and has certain significance for the research of wide area scanning imaging system.<br/></div> &copy; 2023 SPIE.
Number of references:8
Main heading:Cameras
Controlled terms:Efficiency
Uncontrolled terms:Airborne cameras - Area-Efficient - Circumferential scanning method - Dynamic scanning - Large area efficient imaging for airborne camera - Multi lens splicing - Multi-lens - Scanning algorithms - Scanning methods - Spiral dynamic scanning algorithm  - Spiral dynamics
Classification code:742.2  Photographic Equipment - 913.1  Production Engineering
Numerical data indexing:Area 2.54E+08m2, Size 3.60E+05m, Size 7.50E+03m, Size 9.00E+03m, Time 3.80E+00s
DOI:10.1117/12.2652233
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 82>
 
Accession number:20230813600546
Title:Research on Active Disturbance Rejection Control of Voice Coil Motor Based on Improved Particle Swarm Optimization
Authors:Wang, ZiYuan (1, 2); Ge, Wei (1) 
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of CAS, Shaanxi, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China 
Corresponding author:Ge, Wei(gewei@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12557
Part number:1 of 1
Issue title:AOPC 2022: Optical Sensing, Imaging, and Display Technology
Issue date:2023
Publication year:2023
Article number:125572Z
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510662285
Document type:Conference article (CA)
Conference name:2022 Applied Optics and Photonics China: Optical Sensing, Imaging, and Display Technology, AOPC 2022
Conference date:December 18, 2022  -  December 19, 2022
Conference location:Virtual, Online, China
Conference code:186412
Sponsor:Chinese Society for Optical Engineering (CSOE)
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">As a high-precision position actuator, the voice coil motor (VCM) is widely used in technology of segmented mirror and mirror shape correction in space telescope. In response to the adverse effects of internal and external disturbances on the precision positioning of the VCM, an improved particle swarm optimization (PSO) based active disturbance rejection control (ADRC) VCM position control model is proposed in this paper. Our model is able to present a reasonable solution to the problem that ADRC has numerous parameters which are knotty to configure. In order to prevent precocious convergence or falling into local optimal, a variable weight factor search method is proposed. MATLAB and Simulink are employed for co-simulation and control experiment are designed. The simulation results show that compared with traditional PID control, the control model designed in this paper has better dynamic performance, higher tracking accuracy and better disturbance rejection performance, and it is suitable for high-precision position control under complex environment with a bright engineering application prospect.<br/></div> &copy; 2023 SPIE.
Number of references:10
Main heading:Mirrors
Controlled terms:Disturbance rejection - Particle swarm optimization (PSO) - Position control - Precision engineering - Simulink - Space telescopes - Three term control systems
Uncontrolled terms:Active disturbances rejection controls - Control model - High-precision position - Non-linear expansion - Non-linear expansion status observation - Particle swarm - Particle swarm optimization - Position actuators - Swarm optimization - Voice coil motors
Classification code:723  Computer Software, Data Handling and Applications - 723.2  Data Processing and Image Processing - 731  Automatic Control Principles and Applications - 731.1  Control Systems - 731.3  Specific Variables Control - 741.3  Optical Devices and Systems - 921.5  Optimization Techniques
DOI:10.1117/12.2651636
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 83>
 
Accession number:20232114130706
Title:Development status of low temperature infrared detection technology
Authors:Ke, Shanliang (1, 2); Hu, Binliang (1); Zhang, Zhaohui (1); Zhang, Zhinan (1); Sun, Lijun (1) 
Author affiliation:(1) Xi'an Institute of Optical Precision Machinery, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China 
Corresponding author:Hu, Binliang
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12617
Part number:1 of 1
Issue title:Ninth Symposium on Novel Photoelectronic Detection Technology and Applications
Issue date:2023
Publication year:2023
Article number:1261729
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510664432
Document type:Conference article (CA)
Conference name:9th Symposium on Novel Photoelectronic Detection Technology and Applications
Conference date:April 21, 2023  -  April 23, 2023
Conference location:Hefei, China
Conference code:188142
Sponsor:Chinese Society for Optical Engineering; Science and Technology on Low-light-level Night Vision Laboratory
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">Infrared detection technology is getting more and more attention, with the rapid development of infrared remote sensing application. Among them, low temperature infrared spectroscopy detection technology is an important development direction in the future. Infrared detection technology is a kind of target detection technology, using the infrared radiation characteristics of substances to different wavelengths. Infrared spectrometer is an important instrument to realize infrared detection technology. This type of spectrometer has been popularized and applied. The imaging spectrometer can reflect the spatial information and spectral characteristics of the observation target. With the improvement of spectral imaging resolution, the signal-to-noise ratio of imaging system is required to increase, which is the technical difficulty of low-temperature infrared spectroscopy. At present, noise reduction through low temperature is the main method. Therefore, infrared detection technology to work in a lower temperature direction. Furthermore, it promotes the progress of low temperature infrared spectroscopy technology. This paper summarizes and compares the development status of low temperature infrared spectrum detection technology. Thus, the key technology of low temperature detection spectrum is extracted. The low temperature infrared detection technology is classified according to the development status of low temperature infrared optics, low temperature support technology and low temperature refrigeration technology. Summarize the shortcomings of domestic existing technology and look forward to the future development direction.<br/></div> &copy; 2023 SPIE.
Number of references:59
Main heading:Signal to noise ratio
Controlled terms:Image resolution - Infrared detectors - Infrared radiation - Infrared spectroscopy - Refrigeration - Remote sensing - Temperature
Uncontrolled terms:Detection technology - Development directions - Development status - Infrared detection - Infrared optics - Infrared remote sensing - Infrared: spectroscopy - Lows-temperatures - Refrigeration technology - Support technology
Classification code:641.1  Thermodynamics - 644.1  Refrigeration Methods - 716.1  Information Theory and Signal Processing - 741.1  Light/Optics - 944.7  Radiation Measuring Instruments
DOI:10.1117/12.2664844
Funding details:  
Funding text:Conclusion Many researchers from Xi 'an Institute of Optics and Machinery, Chinese Academy of Sciences contributed to this study. These include first author Shanliang Ke, corresponding author Bingliang Hu, and researchers Zhaohui Zhang, Zhinan Zhang, and Lijun Sun. We thank the Spectral Imaging Technology Laboratory of Xi 'an Institute of Optical Machinery for the support. We also thank the High-resolution Hyperspectral Payload Technology Project Group for their support.
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 84>
 
Accession number:20231213748668
Title:Co-phase error detection for segmented mirrors with ptychography
Authors:Li, Liangliang (1, 2); Pan, An (1, 2); Li, Chuang (1, 2); Zhao, Hui (1, 2) 
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, Chuang(lichuang@opt.ac.cn)
Source title:Optics Communications
Abbreviated source title:Opt Commun
Volume:537
Issue date:June 15, 2023
Publication year:2023
Article number:129393
Language:English
ISSN:00304018
CODEN:OPCOB8
Document type:Journal article (JA)
Publisher:Elsevier B.V.
Abstract:<div data-language="eng" data-ev-field="abstract">Co-phase error detection has been extensively studied as a key technology to achieve diffraction-limited imaging for telescopes with segmented primary mirrors. This paper provides a novel method to simultaneously detect piston, tip&ndash;tilt, and decenter errors of sub-mirrors based on an extended ptychographic iterative engine (ePIE). The main components of the detection system are a transmissive specimen and a detector near the focal plane of the segmented system. The specimen is mechanically moved across the stationary beam from the telescope with adjacent positions sufficiently overlapped, and the detector then records the diffraction patterns. After retrieving the wavefront aberration of the segmented primary mirror using ePIE, the decenter errors can be calculated based on the displacement of the pupil centers of sub-mirrors and the piston and tip&ndash;tilt errors can be computed by the least square method According to a series of numerical simulations, the root mean square errors (RMSEs) of the residual co-phase errors are below 0.01 &lambda;. The results of preliminary experiments show that the relative errors of piston error detection and decenter error detection are 1.20% and 2.08%, respectively, which validates the effectiveness of our proposed method.<br/></div> &copy; 2023 Elsevier B.V.
Number of references:36
Main heading:Mirrors
Controlled terms:Aberrations - Diffraction - Error detection - Iterative methods - Least squares approximations - Mean square error - Numerical methods - Pistons - Telescopes - Wavefronts
Uncontrolled terms:Co phase - Co-phase error - Extended ptychographic iterative engine - Key technologies - Phase error - Phase error detection - Segmented mirror - Segmented primary mirrors - Tip-tilt - Wavefront aberrations
Classification code:612.1.1  Internal Combustion Engine Components - 741.3  Optical Devices and Systems - 921.6  Numerical Methods - 922.2  Mathematical Statistics
Numerical data indexing:Percentage 1.20E+00%, Percentage 2.08E+00%
DOI:10.1016/j.optcom.2023.129393
Funding details:  Number: 12104500, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This work was supported by National Natural Science Foundation of China [grant numbers 12104500 ].
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 85>
 
Accession number:20231213774330
Title:Terahertz fiber with multi-concentric ring cores for OAM modes propagation
Authors:Yuan, Yuan (1); Kong, Depeng (1); Guan, Lei (1, 2); Wang, Lili (1); Li, Wenlong (1) 
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi&rsquo;an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shannxi, Xi&rsquo;an; 710119, China; (2) National and Local Joint Engineering Laboratory of POF Production and Application, Sichuan, Chengdu; 611230, China 
Corresponding author:Kong, Depeng(kongdp@opt.ac.cn)
Source title:Physica Scripta
Abbreviated source title:Phys Scr
Volume:98
Issue:4
Issue date:April 1, 2023
Publication year:2023
Article number:045504
Language:English
ISSN:00318949
E-ISSN:14024896
CODEN:PHSTBO
Document type:Journal article (JA)
Publisher:Institute of Physics
Abstract:<div data-language="eng" data-ev-field="abstract">A novel fiber incorporating central hollow, porous isolated layers, and concentric ring cores is proposed for the simultaneous propagation of multi-terahertz (THz) orbital angular momentum (OAM) modes with low-level inter-core and inter-mode crosstalk. The designed fiber can efficiently support 132 OAM modes in 0.6 &sim; 1.5 THz, 178 OAM modes in 0.7 &sim; 1.5 THz, etc, the high-order radial modes are suppressed within the whole frequency range meanwhile, and the number of OAM modes can be further boosted by further increasing the number of ring cores. In addition, the fiber has low confinement loss, flat dispersion, and high purity over a wide operating range. Hence it can be applied in mode-division multiplexing (MDM) based on OAM combined with core-division multiplexing (CDM) in THz range, and is also compatible with wavelength-division multiplexing (WDM) and multi-level modulation formats. The realized fiber is expected to dramatically extend the transmission capacity and spectral efficiency.<br/></div> &copy; 2023 IOP Publishing Ltd.
Number of references:44
Main heading:Fibers
Controlled terms:Angular momentum
Uncontrolled terms:Concentric rings - Core modes - Isolated layer - Mode propagation - Multilplexing - Orbital angular momentum - Orbital angular momentum mode - Ring-core - Tera Hertz - Terahertz fiber
Numerical data indexing:Frequency 1.50E+12Hz
DOI:10.1088/1402-4896/acbf87
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 86>
 
Accession number:20230613558963
Title:Design of MWIR hyperspectral imagers based on acousto-optic tunable filters
Authors:Li, Xijie (1, 2); Gao, Ming (1); Liu, Jun (1); Li, Yong (2); Feng, Yutao (2) 
Author affiliation:(1) School of Opto-electronical Engineering, Xi'an Technological University, Xi'an; 710021, China; (2) Key Laboratory of Spectral Imaging Technology, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China 
Corresponding author:Gao, Ming(minggao1964@163.com)
Source title:Optik
Abbreviated source title:Optik
Volume:276
Issue date:April 2023
Publication year:2023
Article number:170636
Language:English
ISSN:00304026
Document type:Journal article (JA)
Publisher:Elsevier GmbH
Abstract:<div data-language="eng" data-ev-field="abstract">Thermal infrared hyperspectral imagers have significant application values in the field of space optics. However, it is very difficult to obtain the spectral data cube and temperature field information of fast moving targets in a short time. An acousto-optic tunable filter (AOTF) has many advantages, such as fast tuning speed, light weight and no moving parts. It can obtain thermal infrared hyperspectral images of a fast-moving target in a very short integration time. In this paper, a collimating optical system is obtained by splicing optical path a telescope and a secondary imaging mirror. A middle wavelength infrared (MWIR) AOTF is introduced into the collimating optical system to modulate the spectrum and obtain thermal infrared hyperspectral images. The system with a focal length of 18 mm, a relative aperture of 1/2, a field of view (FOV) of 8&deg;, a spectral resolution of 30.08 nm at 4 &micro;m and a 100% cold diaphragm efficiency achieving is taken as a design example. The design results show that the modulation transfer function (MTF) of the system is greater than 0.6 at the Nyquist space frequency of 17 lp/mm, and the imaging quality is close to the diffraction limit. Finally, we develop a prototype of MWIR hyperspectral imager based on AOTFs and do experiments to prove its feasibility.<br/></div> &copy; 2023 Elsevier GmbH
Number of references:26
Main heading:Infrared radiation
Controlled terms:Diffraction - Hyperspectral imaging - Optical systems
Uncontrolled terms:Acoustooptic tunable filters (AOTF) - Collimating optical systems - Data cube - Hyperspectral imagers - Middle wavelength infrared - Moving targets - Narcissu analyse - Spectral data - Thermal infrared hyperspectral images - Thermal-infrared
Classification code:741.1  Light/Optics - 741.3  Optical Devices and Systems - 746  Imaging Techniques
Numerical data indexing:Percentage 1.00E+02%, Size 1.80E-02m, Size 3.008E-08m
DOI:10.1016/j.ijleo.2023.170636
Funding details:  Number: 61424120503xx, Acronym: -, Sponsor: -;Number: E1294301,YJKYYQ20210021, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 2019JQ-931, Acronym: -, Sponsor: Natural Science Basic Research Program of Shaanxi Province;
Funding text:This work is supported by the Funding of Science and Technology on Low-Light-Level Night Version Laboratory (Grant No. 61424120503xx ), Natural Science Basic Research Program of Shaanxi Province (Grant No. 2019JQ-931 ), West Light Cross-Disciplinary Innovation team of Chinese Academy of Sciences (Grant No. E1294301 ), and Research instrument and equipment development project of Chinese Academy of Sciences (Grant No. YJKYYQ20210021 ).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 87>
 
Accession number:20232314199727
Title:High-Accurate Quantitative Phase Imaging Based on the Transport of Intensity Equation and Wavelet Transform
Authors:Fan, Chen (1); Zhao, Hong (1); Zhao, Zixin (1); Li, Junxiang (1); Du, Yijun (1); Zhang, Gaopeng (2) 
Author affiliation:(1) Xi'an Jiaotong University, State Key Laboratory for Manufacturing Systems Engineering, School of Mechanical Engineering, Xi'an; 710049, China; (2) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China 
Corresponding authors:Zhao, Hong(zhaohongxjtu@163.com); Zhao, Zixin(zixinzhao@xjtu.edu.cn)
Source title:IEEE Transactions on Instrumentation and Measurement
Abbreviated source title:IEEE Trans. Instrum. Meas.
Volume:72
Issue date:2023
Publication year:2023
Article number:7004211
Language:English
ISSN:00189456
E-ISSN:15579662
CODEN:IEIMAO
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">We propose a high-accurate quantitative phase imaging (QPI) method by using transport of intensity equation (TIE) and wavelet transform (WT). TIE provides a simple and fast method for QPI, but its accuracy is always limited due to the nonlinear error and noise problems caused by the defocus distance. To improve the accuracy of the phase recovered by TIE, WT is introduced to combine with TIE under several defocus distances. With the help of the multiresolution characteristics of the WT, effective information can be extracted from the phases retrieved with TIE at different defocus distances. As a result, a more accurate phase can be obtained by fusing this effective information. Moreover, to extend the applicability of our method, the problems of phase discrepancy and phase singularity in TIE are discussed and solved with an iterative WT-TIE algorithm. Numerical simulations and experiments with various types of phase maps are presented to comprehensively demonstrate the accuracy and effectiveness of our method.<br/></div> &copy; 1963-2012 IEEE.
Number of references:47
Main heading:Image resolution
Controlled terms:Computational Imaging - Image compression - Iterative methods - Numerical methods - Wavelet transforms
Uncontrolled terms:Computational imaging - Fitting - Intensity equation - Phase retrieval - Quantitative phase imaging - Transport of intensity - Transport of intensity equation - Wavelets transform
Classification code:746  Imaging Techniques - 921.3  Mathematical Transformations - 921.6  Numerical Methods
DOI:10.1109/TIM.2023.3280499
Funding details:  Number: 52175516,61975161, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2022410, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: -, Acronym: YIPA, Sponsor: Youth Innovation Promotion Association;
Funding text:This work was supported in part by the National Natural Science Foundation of China under Grant 61975161 and Grant 52175516; and in part by the Youth Innovation Promotion Association, Chinese Academy of Sciences (CAS), under Grant 2022410.
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 88>
 
Accession number:20230613538012
Title:Study on optimization method of multi-point combined adhesive process for optical plane mirror
Authors:Xiang-Ke, Zheng (1); Shi-Fa, Kang (1); Hua, Li (1); Peng, Wang (1); Xiaoyan, Li (1); Lin-Sen, Shu (2) 
Author affiliation:(1) Xi'an institute of optices and precision mechanics of cas, Xi'an; 710119, China; (2) School of Mechanical Engineering, Shaanxi University of technology, Hanzhong; 723001, China 
Corresponding author:Xiang-Ke, Zheng(zhengxiangke@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12507
Part number:1 of 1
Issue title:Advanced Optical Manufacturing Technologies and Applications 2022; and 2nd International Forum of Young Scientists on Advanced Optical Manufacturing, AOMTA and YSAOM 2022
Issue date:2023
Publication year:2023
Article number:1250718
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510661264
Document type:Conference article (CA)
Conference name:Advanced Optical Manufacturing Technologies and Applications 2022, AOMTA 2022 and 2nd International Forum of Young Scientists on Advanced Optical Manufacturing, YSAOM 2022
Conference date:July 29, 2022  -  July 31, 2022
Conference location:Changchun, China
Conference code:186036
Sponsor:Changchun Institute of Optics, Fine Mechanics and Physics, CAS; Changchun University of Science and Technology; Changchun University of Technology; et al.; Jilin University; University of Shanghai for Science and Technology
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">In order to quickly obtain the optimal bonding styles in the adhesive bonded mirror, the simulation and experimental study of the adhesive bonding assembly process for plane mirror were carried out. A single-factor experiment was designed to study the variation of the PV and RMS values of the surface-shape of optical plane mirror with the change of various factors. Then, an orthogonal experiment was designed to study the optimal parameters for the optimal bonding process by taking the PV and RMS of the surface-shape as comprehensive indexes. A finite element model named "Mirror-Adhesive -Frame" was developed using ANSYS Parametric Design Language (APDL) to calculate the PV and RMS values of the surface-shape of the mirror after bonding. In addition, a interference instrument named ZYGO is used to verify the correctness of the surface shape from simulation. The results show that the prediction results of the developed simulation model are in good agreement with the measurement results. The values of surface shape index PV and RMS increase with the increase of adhesive layer diameter and thickness, and gradually decrease with the increase of adhesive layer position in R direction and H direction.The orthogonal experiment with four factors and three levels revealed that the diameter of adhesive layer is the main factor to change the shape of the surface. The optimal process parameters are as follows: adhesive layer diameter of &Phi;4mm, adhesive layer thickness of 0.1 mm. adhesive layer position in R-direction of 40 mm and adhesive layer position in H-direction of 9.5mm.<br/></div> &copy; 2023 SPIE. All rights reserved.
Number of references:11
Main heading:Mirrors
Controlled terms:Adhesives - Finite element method - Optical testing - Optimization
Uncontrolled terms:Adhesive layers - Adhesives bonding - Finite element modelling (FEM) - Optical planes - Optimal bonding - Orthogonal experiment - Plane mirrors - Process optimisation - RMS values - Surface shape
Classification code:741.3  Optical Devices and Systems - 921.5  Optimization Techniques - 921.6  Numerical Methods
Numerical data indexing:Size 1.00E-04m, Size 4.00E-02m, Size 9.50E-03m
DOI:10.1117/12.2655549
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 89>
 
Accession number:20232214160679
Title:Thermal Insulation Structure Design and Simulation Analysis of Optical Measuring Device under Extremely Low-Temperature Based on Phase Change Temperature Control    (Open Access)
Authors:Guo, Hailong (1, 2); Zhang, Zhi (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:Journal of Physics: Conference Series
Abbreviated source title:J. Phys. Conf. Ser.
Volume:2492
Part number:1 of 1
Issue:1
Issue date:2023
Publication year:2023
Article number:012002
Language:English
ISSN:17426588
E-ISSN:17426596
Document type:Conference article (CA)
Conference name:2023 6th International Conference on Intelligent Manufacturing and Automation, IMA 2023
Conference date:January 13, 2023  -  January 15, 2023
Conference location:Guangzhou, Virtual, China
Conference code:188524
Publisher:Institute of Physics
Abstract:<div data-language="eng" data-ev-field="abstract">To meet the thermal insulation requirements of the measurement system in the liquid oxygen tank of the rocket, we designed the thermal insulation structure of the optical measuring device at an extremely low temperature based on phase change temperature control, selected neicosane as the phase change material, and used 15 mm phase change layer to combine with 9 mm polyurethane thermal insulation layer to achieve passive temperature control. Finally, a thermal simulation model is established for transient thermal analysis. The simulation results show that the internal temperature of the system decreases from the initial temperature of 50 &deg;C to -13.9 &deg;C after 2 hours, which proves that the design meets the requirements.<br/></div> &copy; Published under licence by IOP Publishing Ltd.
Number of references:10
Main heading:Temperature control
Controlled terms:Liquefied gases - Phase change materials - Rockets - Structural design - Temperature - Thermal insulation - Thermoanalysis
Uncontrolled terms:Design Analysis - Design and simulation - Insulation structure designs - Liquid oxygen tank - Lows-temperatures - Measurement system - Optical measuring devices - Phase change temperature - Simulation analysis - Structure simulations
Classification code:408.1  Structural Design, General - 413.2  Heat Insulating Materials - 641.1  Thermodynamics - 654.1  Rockets and Missiles - 731.3  Specific Variables Control - 801  Chemistry
Numerical data indexing:Size 1.50E-02m, Size 9.00E-03m, Temperature 2.591E+02K, Temperature 3.23E+02K, Time 7.20E+03s
DOI:10.1088/1742-6596/2492/1/012002
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
 
<RECORD 90>
 
Accession number:20232114115565
Title:Combination algorithms applied to source reconstruction for neutron coded images and restoration for incomplete coded images
Authors:Li, Qiukai (1, 2); Yan, Yadong (1); Wang, Feng (2); He, Junhua (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:He, Junhua(hjh@opt.ac.cn)
Source title:Review of Scientific Instruments
Abbreviated source title:Rev. Sci. Instrum.
Volume:94
Issue:5
Issue date:May 1, 2023
Publication year:2023
Article number:053301
Language:English
ISSN:00346748
E-ISSN:10897623
CODEN:RSINAK
Document type:Journal article (JA)
Publisher:American Institute of Physics Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">The neutron emission of compressed capsules filled with fuels in inertial confinement fusion implosions can be measured by neutron imaging systems. Source reconstruction is an important method in coded-aperture imaging. In this paper, we use a combination algorithm to reconstruct the neutron source image. This method can improve the resolution and signal-noise ratio of the reconstructed image. In addition, the ray tracing method is used to obtain the point spread functions of the whole field of view (250 &mu;m), and thus, the system response can be obtained. The edge gray interpolation method is used to restore the missing portion of incomplete coded images. The method can maintain a good performance when the missing-data angle is limited to less than 50&deg;.<br/></div> &copy; 2023 Author(s).
Number of references:21
Main heading:Image reconstruction
Controlled terms:Image enhancement - Inertial confinement fusion - Neutron sources - Optical transfer function - Restoration
Uncontrolled terms:Coded aperture imaging - Fusion implosions - Inertial-confinement fusions - Neutron imaging systems - Point-Spread function - Ray-tracing method - Reconstructed image - Signal-noise ratio - Source images - Source reconstruction
Classification code:741.1  Light/Optics - 932.2.1  Fission and Fusion Reactions
Numerical data indexing:Size 2.50E-04m
DOI:10.1063/5.0138742
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 91>
 
Accession number:20232114130375
Title:Freeform surface compensation design for machining error of primary mirror
Authors:Huang, Cheng (1); Xie, Yongjun (1); Mao, Xianglong (1) 
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China University of Chinese Academy of Sciences, Beijing 100049, China 
Corresponding author:Mao, Xianglong(maoxianglong@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12617
Part number:1 of 1
Issue title:Ninth Symposium on Novel Photoelectronic Detection Technology and Applications
Issue date:2023
Publication year:2023
Article number:1261775
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510664432
Document type:Conference article (CA)
Conference name:9th Symposium on Novel Photoelectronic Detection Technology and Applications
Conference date:April 21, 2023  -  April 23, 2023
Conference location:Hefei, China
Conference code:188142
Sponsor:Chinese Society for Optical Engineering; Science and Technology on Low-light-level Night Vision Laboratory
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">Considering the demand of high-resolution imaging and dark targets detection, large-aperture space telescopes have always been the most direct tool for human observation of the universe. However, limited by the capability of current optical manufacturing equipment, the difficulty, cycle and cost of fabricating the primary mirror increase significantly as the optical surface aperture increased, and the accuracy requirements of the mirror are also closely related. In order to reduce the machining accuracy requirements, a freeform optical wavefront compensation method was proposed to increase the tolerance on the manufacturing error of the primary mirror. In this paper, we compensated two different large aperture telescope systems, and one of their mirrors were replaced by freeform surfaces represented by 37-term Zernike fringe polynomials in the optical system to correct the system wavefront distortion caused by the machining error of the large-aperture primary mirror. A new algorithm that is based on the principle of equal optical path and ray tracing was adopted here for the construction of freeform surfaces. The design results proved the superiority of the compensation method and the new algorithm of freeform surface. The machining accuracy demand was reduced by more than one order of magnitude, and high-quality imaging of the optical system was realized with the low-precision primary mirror.<br/></div> &copy; 2023 SPIE.
Number of references:20
Main heading:Optical systems
Controlled terms:Adaptive optics - Error compensation - Mirrors - Optical design - Optical testing - Space telescopes - Wavefronts
Uncontrolled terms:Compensation designs - Compensation method - Free-form surface - Freeform optics - High-resolution imaging - Imaging optical design - Large aperture - Machining Accuracy - Machining error - Primary mirrors
Classification code:741.1  Light/Optics - 741.3  Optical Devices and Systems
DOI:10.1117/12.2666802
Funding details:  Number: 62105357, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: YIPA CAS, Sponsor: Youth Innovation Promotion Association of the Chinese Academy of Sciences;
Funding text:This research was supported by the National Natural Science Foundation of China (Grant No. 62105357) and Youth Innovation Promotion Association CAS.
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 92>
 
Accession number:20223812765181
Title:Hilbert transformation deep learning network for single-shot moir&eacute; profilometry
Authors:Ma, Pu (1); Du, Hubing (1); Ma, Yueyang (1); Zhang, Gaopeng (2); Wang, Feng (2); Zhao, Zixin (3); Feng, Leijie (1) 
Author affiliation:(1) School of Mechatronic Engineering, Xi'an Technological University, Shaanxi, Xi'an; 710032, China; (2) Xi'an Institute of Optics and Precision Mechanics, CAS, Xi'an; 710119, China; (3) State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Shaanxi, Xi'an; 710049, China 
Corresponding author:Du, Hubing(duhubing@xatu.edu.cn)
Source title:Optics and Lasers in Engineering
Abbreviated source title:Opt Lasers Eng
Volume:160
Issue date:January 2023
Publication year:2023
Article number:107279
Language:English
ISSN:01438166
CODEN:OLENDN
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">Phase demodulation from a single moir&eacute; fringe pattern is an ill-posed inverse problem that limits the applications of moir&eacute; profilometry in dynamic three-dimensional (3D) measurement. In this paper, a deep-learning-based high-precision technique is used to solve this problem arising from highly under sampled inputs. Our novel approach termed two-dimensional (2D) Hilbert transformation network uses two Res U-Net networks paired with a dichotomous network to generate the desired quadrature fringe pattern by referring to the input. This process can be viewed as 2D Hilbert transformation of a fringe pattern. By using the proposed network, the wrapped phase can be extracted easily if the sampled fringe pattern is filtered and normalized in advance. Experimental results obtained using the proposed Hilbert transformation network trained on simulated data indicate that it is a simple, albeit robust solution for phase extraction from a single fringe pattern with a phase error of less than 0.02 rad. Thus, the proposed network represents a novel approach to reliable and practical learning-based single-shot Moir&eacute; profilometry.<br/></div> &copy; 2022 Elsevier Ltd
Number of references:24
Main heading:Profilometry
Controlled terms:Deep learning - Demodulation - Interferometry - Inverse problems - Mathematical transformations - Metadata - Optical variables measurement
Uncontrolled terms:2d hilbert transform - Deep learning - Fringe pattern - Hilbert transform - Hilbert transformations - ILL-posed inverse problem - Learning network - Moire profilometry - Phase demodulation - Single-shot
Classification code:461.4  Ergonomics and Human Factors Engineering - 921.3  Mathematical Transformations - 941.4  Optical Variables Measurements
Numerical data indexing:Absorbed dose 2.00E-04Gy
DOI:10.1016/j.optlaseng.2022.107279
Funding details:  Number: 2021GY-274, Acronym: -, Sponsor: -;Number: 51905529,51975448, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2022410, Acronym: YIPA CAS, Sponsor: Youth Innovation Promotion Association of the Chinese Academy of Sciences;
Funding text:National Natural Science Foundation of China ( 51975448 , 51905529 ); Key R & D Plan of Shaanxi Province ( 2021GY-274 ), and Youth Innovation Promotion Association , CAS ( 2022410 ).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 93>
 
Accession number:20231613905077
Title:Scattering Model for Stray Light Calculations in Laser Interferometry Application to TianQin Science Interferometer    (Open Access)
Authors:Yan, Haoyu (1, 2); Chen, Qinfang (1); Wang, Hu (1, 2); Wang, Xingyan (1, 2); Ma, Zhanpeng (1, 2) 
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:Wang, Hu(wanghu@opt.ac.cn)
Source title:Journal of Physics: Conference Series
Abbreviated source title:J. Phys. Conf. Ser.
Volume:2464
Part number:1 of 1
Issue:1
Issue date:2023
Publication year:2023
Article number:012008
Language:English
ISSN:17426588
E-ISSN:17426596
Document type:Conference article (CA)
Conference name:2nd International Conference on Advanced Optics and Photonics Research in Engineering, AOPR 2022
Conference date:February 16, 2022  -  February 17, 2022
Conference location:Virtual, Online
Conference code:187465
Publisher:Institute of Physics
Abstract:<div data-language="eng" data-ev-field="abstract">In the field of space optics, correct estimation of the amount of stray light is necessary to evaluate system performance and guide the selection of the correct design. Given the noise target of several picometers on distance measurements, this configuration is very sensitive to stray-light noise; thus, stray-light estimation is an important part of the design process. For complex optical systems, stray-light simulations can be performed by using specific optical analysis software (FRED, Tracepro, ASAP), which require expensive licenses and excessive computing time. Herein, we consider the effects of combined roughness, mirror contamination, and surface imperfections, construct a unified physical scattering model and simulate it. According to the analysis, the stray light of the telescope system is less than 1010 of the outgoing laser power.These considerations apply to various optical systems.<br/></div> &copy; Published under licence by IOP Publishing Ltd.
Number of references:17
Main heading:Stray light
Controlled terms:Laser interferometry
Uncontrolled terms:Analysis softwares - Complex optical systems - Design-process - Interferometry applications - Light estimations - Light noise - Optical analysis - Scattering model - Systems performance - TracePro
Classification code:741.1  Light/Optics - 741.3  Optical Devices and Systems - 743.2  Holographic Applications - 744.9  Laser Applications - 941.4  Optical Variables Measurements
DOI:10.1088/1742-6596/2464/1/012008
Funding details:  Number: 2021YFC2202104,2021YFC2203501, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;
Funding text:This work was supported by the National Key R&D Program of China (Nos. 2021YFC2202104, 2021YFC2203501).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
 
<RECORD 94>
 
Accession number:20232114130365
Title:Adaptive Point Design Algorithm to Generate Toolpath in Fast Tool Servo Ultra-Precision Machining of Freeform Surface
Authors:Zhaohan, Cai (1, 2); Jinpeng, Li (1); Yongjun, Xie (1); Xianglong, Mao (1, 2) 
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:Xianglong, Mao(maoxianglong@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12617
Part number:1 of 1
Issue title:Ninth Symposium on Novel Photoelectronic Detection Technology and Applications
Issue date:2023
Publication year:2023
Article number:1261765
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510664432
Document type:Conference article (CA)
Conference name:9th Symposium on Novel Photoelectronic Detection Technology and Applications
Conference date:April 21, 2023  -  April 23, 2023
Conference location:Hefei, China
Conference code:188142
Sponsor:Chinese Society for Optical Engineering; Science and Technology on Low-light-level Night Vision Laboratory
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">Compared with traditional coaxial multi-reflection imaging systems, the off-axis imaging system using optical freeform has many advantages, including high design freedom, small optical system size and high energy utilization. Nowadays, optical freeform surfaces have been widely utilized in imaging and non -imaging optical systems. But correspondingly, freeform machining is more difficult than spherical and aspherical optical reflectors. In the turning process, toolpath plays a critical role because it will determine the accuracy of the machined surface. The conventional methods to generate toolpath include constant-angle method, constant-arc-length method and the combination of constant-angle and constant-arc-length methods. This article proposes a new method based on an adaptive point design algorithm (APDA) to generate a series of cutting points. It will generate the cutter's toolpath based on the tangential height changes of the ideal surface. Through the simulation, the algorithm is verified that it can achieve the same accuracy when reducing the amount of data by about 40%, compared with the traditional constant-angle method. This makes freeform machining faster and provides the basis for precision machining of large-aperture freeform surfaces.<br/></div> &copy; 2023 SPIE.
Number of references:10
Main heading:Energy utilization
Controlled terms:Imaging systems - Optical systems - Turning
Uncontrolled terms:Angle method - Arc length method - Diamond turning - Free-form surface - Freeform fabrication - Freeforms - Microstructure fabrication - Point design - Toolpath design - Toolpaths
Classification code:525.3  Energy Utilization - 604.2  Machining Operations - 741.3  Optical Devices and Systems - 746  Imaging Techniques
Numerical data indexing:Percentage 4.00E+01%
DOI:10.1117/12.2666675
Funding details:  Number: 62105357, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: YIPA CAS, Sponsor: Youth Innovation Promotion Association of the Chinese Academy of Sciences;
Funding text:This research was supported by the National Innovation Promotion Association CAS.This research was supported by the National Natural Science Foundation of China (Grant No. 62105357) and Youth Innovation Promotion Association CAS.
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 95>
 
Accession number:20232014081253
Title:Research Progress of Raman Spectroscopy Technology for Deep Space Exploration
Title of translation:&#28145; &#31354; &#25506; &#27979; &#25289; &#26364; &#20809; &#35889; &#25216; &#26415; &#30740; &#31350; &#36827; &#23637;
Authors:Zhao, Yiyi (1, 2); Xue, Bin (1, 2); Huang, Shuaidong (1, 2); Xie, Xinmei (1, 2); Yang, Jianfeng (1, 2) 
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shaanxi, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China 
Corresponding author:Yang, Jianfeng(yangjf@opt.ac.cn)
Source title:Guangxue Xuebao/Acta Optica Sinica
Abbreviated source title:Guangxue Xuebao
Volume:43
Issue:8
Issue date:April 2023
Publication year:2023
Article number:0822006
Language:Chinese
ISSN:02532239
CODEN:GUXUDC
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">Significance The detection of material composition on the surface of celestial bodies has always been an important content in lunar and deep space exploration. At present, the main detection means of material composition on the surface of celestial bodies is visible-near-infrared spectroscopy. Given the wide variety of material components on the surface of celestial bodies, attention should be paid to their chemical properties and content. The current single payload is difficult to meet these requirements, and it is necessary to develop new scientific payload technologies. Over the past two decades, the potential of Raman spectroscopy as a tool for lunar and deep space exploration has been intensively explored. Raman spectroscopy has the advantages of no need to prepare samples, fast and non-destructive analysis, and clear identification of molecular information. Thus, it is very suitable for the in situ detection of celestial bodies. Compared with visible and near-infrared spectroscopy, Raman spectroscopy has unique advantages in the detection of celestial surface materials. 1) The Raman spectrum peaks are clear and sharp without overlapping, which is conducive to the identification of minerals, especially for the composition and content measurement of mixed minerals. 2) It is not only easy to identify feldspar minerals, but also can detect other iron-free minerals. 3) It can detect inorganic substances, hydrous minerals, and organic substances at the same time. Therefore, Raman spectroscopy is a method with important application value and potential for the detection of material composition on the surface of celestial bodies, which complements the advantages of traditional visible light and near-infrared spectroscopy. Progress Since the first commercial laser Raman spectrometer came out in 1987, Raman spectroscopy, as a powerful spectral analysis technique, has been widely applied in various material analysis fields. In 1995, Wang et al. first proposed the application of Raman spectroscopy on the lunar surface to detect its surface material composition. Subsequently, scientists successively proposed to apply Raman spectroscopy technology to the detection of extraterrestrial celestial bodies such as the moon and Mars and put forward optical probe type short-range detection Raman, long-range Raman, and time-resolved Raman. Raman spectrometers served as a potential payload in the Mars Exploration Rover mission of American and Tianwen-1 mission of China but ultimately were not adopted due to low technology maturity. With the development of lasers, charge-coupled devices, and other instrument components, the application of Raman spectroscopy technology to deep space exploration has become a reality. After years of verification of principle devices, various countries have added or plan to add Raman spectrometers to the payload queue for deep space exploration. The Perseverance Mars rover launched by NASA in 2020 is equipped with two Raman spectrometers SHERLOC and SuperCam. SHERLOC mounted on the robotic arm is a close-working deep-UV Raman and fluorescence spectrometer. The SuperCam is mounted on the mast and includes an image intensifier-based long-range time-resolved Raman spectrometer with a working distance of 7-12 m. ESA's Mars rover ExoMars is preparing to carry a Raman spectrometer RLS. RLS mounted inside the cabin is a close-range Raman spectrometer with an excitation wavelength of 532 nm. Japan's Phobos mission MMX is also preparing to carry the Raman spectrometer RAX. RAX mounted at the bottom of the rover is a close-range Raman spectrometer with an excitation wavelength of 532 nm. China's Chang'e-7 lunar exploration mission also plans a Raman spectrometer. The Chang'e-7 Raman spectrometer is a long-range time-resolved Raman spectrometer based on an image intensifier, with an excitation wavelength of 532 nm and a working distance of 1. 2-3. 0 m. Table 1 lists the parameter comparison of the above five Raman spectrometer payloads. This paper analyzes and discusses the key issues of Raman spectroscopy for deep space exploration. Due to the laser ablation limit of the material, there is a contradiction between the signal intensity of Raman spectroscopy and its spatial resolution. Long-range Raman spectrometers should focus more on signal strength, while close-range Raman spectrometers should focus more on spatial resolution. In terms of excitation wavelength selection, each excitation wavelength has its advantages and disadvantages. The most important thing in the selection of excitation wavelength is to consider the priorities of various scientific mission objectives. Fluorescence suppression is still one of the main problems faced by Raman spectroscopy. Infrared/ultraviolet excitation, time gating, frequency-shift excitation, and photobleaching are effective methods for suppressing fluorescence in deep-space Raman spectrometers. Raman spectroscopy technology for deep space exploration requires the support of many key components, and key components such as intensifiers and gratings still need to be developed. Conclusions and Prospects Raman spectroscopy is a very powerful tool for detecting the composition of astronomical matters and is being applied by increasingly more deep space exploration missions. At present, the development trend of Raman spectroscopy technology for deep space exploration is modularization and miniaturization, multi-technology joint detection, long-range and short-range joint detection, and diversified detection fields.<br/></div> &copy; 2023 Chinese Optical Society. All rights reserved.
Number of references:40
Main heading:Raman spectroscopy
Controlled terms:Infrared devices - Interplanetary flight - Lunar missions - Martian surface analysis - Near infrared spectroscopy - Optical design - Rovers - Space research - Spectrometers - Spectrum analysis
Uncontrolled terms:Celestial bodies - Deep-space exploration - Excitation wavelength - Grating spectrometers - Laser spectrum - Lunar and deep space exploration - Material compositions - Raman spectrometers - Spectral measurement - Spectroscopy technology
Classification code:655.1  Spacecraft, General - 656.1  Space Flight - 656.2  Space Research - 741.1  Light/Optics - 741.3  Optical Devices and Systems
Numerical data indexing:Size 0.00E00m, Size 5.32E-07m, Size 7.00E+00m to 1.20E+01m
DOI:10.3788/AOS221968
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 96>
 
Accession number:20232114139897
Title:Research On Shutter-less Non-uniformity Correction Technology Based on Ambient Temperature
Authors:Zhou, Feng (1, 2); Chen, Yaohong (1); Wang, Feng (1); Xie, Qingsheng (1); Wang, Huawei (1) 
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shaanxi, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China 
Corresponding author:Wang, Huawei(whw@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12615
Part number:1 of 1
Issue title:International Conference on Signal Processing and Communication Technology, SPCT 2022
Issue date:2023
Publication year:2023
Article number:126151L
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510664333
Document type:Conference article (CA)
Conference name:2022 International Conference on Signal Processing and Communication Technology, SPCT 2022
Conference date:December 23, 2022  -  December 25, 2022
Conference location:Harbin, China
Conference code:188140
Sponsor:Academic Exchange Information Centre (AEIC); Greater Noida Institute of Technology (GNIOT)
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">Infrared imaging technology is widely used in national defense, industry, medical and other fields. High performance infrared imaging technology is highly valued by all countries in the world. However, the inhomogeneity, the inherent characteristic of infrared image, will seriously affect the real information of the image and seriously restrict the performance of infrared imaging system. In this paper, we proposed a shutter-less non-uniformity correction (SLNUC) algorithm based on ambient temperature. The SLNUC is based on the non-uniformity correction of the collected image of HgCdTE mid-wave infrared detector. The experimental results show that the SLNUC correction algorithm can adapt to the working requirements of a wide temperature range, without affecting the output of video stream, and the non-uniformity reaches 0.17% after correction, which lays a foundation for the development of new equipment.<br/></div> &copy; 2023 SPIE.
Number of references:11
Main heading:Temperature
Controlled terms:Cadmium alloys - II-VI semiconductors - Infrared detectors - Infrared radiation - Medical imaging - Mercury amalgams - Semiconductor alloys - Thermography (imaging)
Uncontrolled terms:Correction algorithms - Infrared image - Infrared imaging technology - Inherent characteristics - Inhomogeneities - National defense industry - Nonuniformity correction - Performance - Shutter-less correction - Technology-based
Classification code:461.1  Biomedical Engineering - 549.3  Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 641.1  Thermodynamics - 712.1  Semiconducting Materials - 741.1  Light/Optics - 742.1  Photography - 746  Imaging Techniques - 944.7  Radiation Measuring Instruments
Numerical data indexing:Percentage 1.70E-01%
DOI:10.1117/12.2673955
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 97>
 
Accession number:20231413833073
Title:Stability analysis of an angle trimmer mechanism applied to a double crystal monochromator    (Open Access)
Authors:Jiang, Bo (1); Zhang, Zijie (2); Zhou, Shun (2); Chu, Yuanbo (2); Guo, Yifan (2) 
Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) Laboratory for Thin Film Techniques and Optical Test, School of Optoelectronics Engineering, Xi'An Technological University, Shaanxi, Xi'an; 710021, China 
Corresponding author:Jiang, Bo(ilysay@opt.ac.cn)
Source title:Journal of Physics: Conference Series
Abbreviated source title:J. Phys. Conf. Ser.
Volume:2450
Part number:1 of 1
Issue:1
Issue date:2023
Publication year:2023
Article number:012051
Language:English
ISSN:17426588
E-ISSN:17426596
Document type:Conference article (CA)
Conference name:2022 6th International Conference on Electrical, Mechanical and Computer Engineering, ICEMCE 2022
Conference date:October 28, 2022  -  October 30, 2022
Conference location:Xi'an, Virtual, China
Conference code:187125
Publisher:Institute of Physics
Abstract:<div data-language="eng" data-ev-field="abstract">Double crystal monochromator is the core device of the synchrotron light source beamline, for the application of double crystal monochromator trimmer mechanism not only needs a high angular adjustment resolution, but also needs a high inherent frequency to ensure its stability. In this paper, we have analyzed the inherent frequency of an angle-trimming mechanism applied to a biocrystal monochromator by the energy method, established the relationship equation between its inherent frequency and each parameter of the mechanism, and analyzed the influence of each parameter on its inherent frequency. And we establish the simulation model according to the actual installation situation to carry out finite element analysis. The results prove that the mechanism has excellent stability performance and meets the requirements of light source use.<br/></div> &copy; Published under licence by IOP Publishing Ltd.
Number of references:6
Main heading:Monochromators
Controlled terms:Finite element method - Light sources - Synchrotron radiation
Uncontrolled terms:Beam-lines - Biocrystals - Double crystal monochromators - Energy method - Inherent frequencies - Relationship equations - Simulation model - Stability analyze - Synchrotron light source - Trim mechanisms
Classification code:741.3  Optical Devices and Systems - 921.6  Numerical Methods - 932.1.1  Particle Accelerators
DOI:10.1088/1742-6596/2450/1/012051
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
 
<RECORD 98>
 
Accession number:20230813600610
Title:Athermalization of star sensor optical system with large field of view and low distortion
Authors:Wang, Xingyan (1, 2); Wang, Hu (1, 2); Shen, Yang (1); Ma, Zehua (1, 2); Yan, Haoyu (1, 2) 
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shaanxi, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China 
Corresponding author:Wang, Hu(wanghu@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12557
Part number:1 of 1
Issue title:AOPC 2022: Optical Sensing, Imaging, and Display Technology
Issue date:2023
Publication year:2023
Article number:125571N
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510662285
Document type:Conference article (CA)
Conference name:2022 Applied Optics and Photonics China: Optical Sensing, Imaging, and Display Technology, AOPC 2022
Conference date:December 18, 2022  -  December 19, 2022
Conference location:Virtual, Online, China
Conference code:186412
Sponsor:Chinese Society for Optical Engineering (CSOE)
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">Star sensor is the key measurement equipment for satellite positioning and spacecraft attitude control. It provides high-precision measurement data for spacecraft attitude control and astronomical navigation. In order to realize the accurate measurement of star positioning and spacecraft attitude by star sensor in the environment with large temperature difference in space, according to the thermal compensation theory, an athermal star sensor lens with wide band, large field of view, low distortion is designed, which can work in wide temperature range. The working band is 450nm~850nm, the F number is 1.5, the field angle is 20&deg;, and the diameter of the pupil is 30mm. The analysis results show that the relative distortion of the system is less than 0.06%, the lateral aberration of the full field is less than 3.7&mu;m, the surrounding full field-of-view energy ratio within &phi;20mm is large than 80%, and temperature range is -50&#8451; ~60&#8451;. The change of relative distortion, lateral aberration, energy concentration and other indicators relative to 20&#8451; is no more than &plusmn;10%, which fully meets the application requirements of high-precision star sensor in space environment.<br/></div> &copy; 2023 SPIE.
Number of references:5
Main heading:Optical design
Controlled terms:Attitude control - Optical systems - Star trackers - Stars
Uncontrolled terms:Athermalization - High-precision measurement - Large field of views - Low-distortion - Measurement data - Measurement equipment - Relative distortion - Satellite positioning - Spacecraft attitude control - Star sensors
Classification code:657.2  Extraterrestrial Physics and Stellar Phenomena - 731.3  Specific Variables Control - 741.1  Light/Optics - 741.3  Optical Devices and Systems
Numerical data indexing:Percentage 1.00E+01%, Percentage 6.00E-02%, Percentage 8.00E+01%, Size 3.00E-02m, Size 3.70E-06m, Size 4.50E-07m to 8.50E-07m
DOI:10.1117/12.2651770
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 99>
 
Accession number:20232314196042
Title:Short pulse laser drive technology in a distance-selective imaging system
Title of translation:&#36317;&#31163;&#36873;&#36890;&#25104;&#20687;&#31995;&#32479;&#20013;&#30701;&#33033;&#20914;&#28608;&#20809;&#39537;&#21160;&#25216;&#26415;&#30740;&#31350;
Authors:Wang, Chong (1); Yang, Jia-Hao (1); Zhu, Bing-Li (2); Han, Jiang-Hao (1); Dang, Wen-Bin (1) 
Author affiliation:(1) School of Electronic Engineering, Xi'an University of Posts and Telecommunications, Xi'an; 710121, China; (2) Key Laboratory of Ultrafast Diagnostic Technology (CAS), Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China 
Corresponding author:Yang, Jia-Hao(y1998jh@163.com)
Source title:Chinese Optics
Abbreviated source title:Chin. Opt.
Volume:16
Issue:3
Issue date:May 2023
Publication year:2023
Pages:567-577
Language:Chinese
ISSN:20971842
Document type:Journal article (JA)
Publisher:Editorial Office of Chinese Optics
Abstract:<div data-language="eng" data-ev-field="abstract">In a distance-selected imaging system based on single-photon detection, a short-pulse laser is emitted and synchronization control between the transmitter and receiver is performed, and the detector operates in photon counting mode and integrates in time to complete the imaging. In order to obtain a short pulse laser that meets the system requirements while reducing the system&rsquo;s size and cost, we propose to apply two types of narrow pulse generation circuits based on RF bipolar transistor and Step Recovery Diode (SRD) to single photon distance selective imaging systems. We introduce the principle and design method of both types and verify the system through simulation, physical fabrication and testing. The characteristics of the pulse generator and factors affecting its pulse width and amplitude are analyzed. The physical test results show that the transistor-based method can generate a narrow pulse with a rise time of 903.5 ps, a fall time of 946.1 ps, a pulse width of 824 ps, and an amplitude of 2.46 V; the SRD-based method can generate a narrow pulse with a rise time of 456.8 ps, a fall time of 458.3 ps, a pulse width of 1.5 ns, and an amplitude of 2.38 V; and the repetition frequency of both can reach 50 MHz. Both design methods can be used with external current-driven laser diodes to achieve excellent short pulse laser output.<br/></div> &copy; 2023 Editorial Office of Chinese Optics. All rights reserved.
Number of references:21
Main heading:Photons
Controlled terms:Avalanche diodes - Design - Imaging systems - Laser pulses - Particle beams
Uncontrolled terms:Design method - Fall time - Narrow pulse - Pulsewidths - Pulswidths - Range-gated imaging - Risetimes - Selective imaging - Short-pulse lasers - Step recovery diodes
Classification code:714.1  Electron Tubes - 744.1  Lasers, General - 746  Imaging Techniques - 931.3  Atomic and Molecular Physics - 932.1  High Energy Physics
Numerical data indexing:Frequency 5.00E+07Hz, Time 1.50E-09s, Time 4.568E-10s, Time 4.583E-10s, Time 8.24E-10s, Time 9.035E-10s, Time 9.461E-10s, Voltage 2.38E+00V, Voltage 2.46E+00V
DOI:10.37188/CO.2022-0142
Funding details:  Number: 51709228, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;Number: 2020JM-578, Acronym: -, Sponsor: -;
Funding text:&#25910;&#31295;&#26085;&#26399;&#65306;2022-06-23&#65307;&#20462;&#35746;&#26085;&#26399;&#65306;2022-07-14 &#22522;&#37329;&#39033;&#30446;&#65306;&#22269;&#23478;&#33258;&#28982;&#31185;&#23398;&#22522;&#37329;&#65288;No. 51709228&#65289;&#65307;&#38485;&#35199;&#30465;&#33258;&#28982;&#31185;&#23398;&#22522;&#37329;&#65288;No. 2020JM-578&#65289; Supported by National Natural Science Foundation of China (No. 51709228); Natural Science Foundation of Shaanxi Province (No. 2020JM-578)
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 100>
 
Accession number:20231714014773
Title:Flexible On-Orbit Calibration for Monocular Camera and Laser Rangefinder Integrated Pose Measurement System
Authors:Zhang, Guangdong (1); Zhang, Gaopeng (2); Yang, Hongtao (2); Wang, Changqing (2); Bao, Wenfan (1); Chen, Weining (1); Cao, Jianzhong (2); Du, Hubing (3); Zhao, Zixin (4); Liu, Chang (3) 
Author affiliation:(1) Northwestern Polytechnical University, School of Automation, Xi'an; 710072, China; (2) Chinese Academy of Sciences, Xi'an Institute of Optics and Precision Mechanics, Xi'an; 710119, China; (3) Xi'an Technological University, School of Mechatronic Engineering, Xi'an; 710021, China; (4) Xi'an Jiaotong University, School of Mechanical Engineering, Xi'an; 710049, China 
Corresponding authors:Zhang, Gaopeng(zhanggaopeng@opt.ac.cn); Yang, Hongtao(yanght@opt.ac.cn)
Source title:IEEE Transactions on Instrumentation and Measurement
Abbreviated source title:IEEE Trans. Instrum. Meas.
Volume:72
Issue date:2023
Publication year:2023
Article number:1003116
Language:English
ISSN:00189456
E-ISSN:15579662
CODEN:IEIMAO
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Due to its low cost and ease of manufacture, integrated monocular space camera and laser rangefinders are commonly used in many space applications (i.e., pose measurement of noncooperative targets). This and other composite systems estimate poses with high precision using a combination of high-resolution lateral visual and high-precision distance information. Notably, any system that is tested on ground must again receive precise on-orbit calibration because the accompanying spaceborne turntables and arms must be frequently manipulated to meet the field-of-view and distance measurement requirements and require complicated realignments. To accommodate flexible multiple target calibration, this study proposed an on-orbit model that obtains accurate pose relationships jointly using the monocular camera and laser rangefinder. First, we invented a robust calibration model and derive its pose transformation matrix based on the given component positions. We then provided an improved (simplified) orthogonal iteration algorithm that optimizes the given matrix for calibration. The influences of different factors on calibration accuracy are quantitatively analyzed via simulations, and the new method's performance is verified with real-world experiments. This system enables several novel and significant space and military applications.<br/></div> &copy; 1963-2012 IEEE.
Number of references:36
Main heading:Laser theory
Controlled terms:Cameras - Iterative methods - Laser applications - Laser beams - Linear transformations - Military applications - Optical radar - Orbits - Range finders - Space applications
Uncontrolled terms:Extraterrestrial measurements - Integrated sensors - Laser range finders - matrix - Measurement by laser beam - Monocular cameras - On-orbit calibration - Pose matrix - Space cameras - Space vehicles
Classification code:404.1  Military Engineering - 656  Space Flight - 716.2  Radar Systems and Equipment - 741.3  Optical Devices and Systems - 742.2  Photographic Equipment - 744.1  Lasers, General - 744.8  Laser Beam Interactions - 744.9  Laser Applications - 921.3  Mathematical Transformations - 921.6  Numerical Methods - 943.1  Mechanical Instruments
DOI:10.1109/TIM.2023.3265638
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 101>
 
Accession number:20232214159224
Title:Hydrogen-Related Anti-Radiation Effect and its Suppression Mechanism in Er<sup>3&#x002B;</sup>&#x002F;Al<sup>3&#x002B;</sup>&#x002F;Ge<sup>4&#x002B;</sup> Co-doped Silica Fibers
Authors:Wang, Gencheng (1); She, Shengfei (1); Zhang, Yuting (1); Wang, Yanan (2); Li, Miao (2); Ma, Zhenchao (2); Zhang, Yan (1); Gao, Song (1); Cui, Xiaoxia (1); Li, Zhe (1); Hou, Chaoqi (1); Guo, Haitao (1) 
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi&#x0027;an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi&#x0027;an, China; (2) Zhongkexin Engineering Consulting (Beijing) Limited Company, Beijing, China 
Source title:Journal of Lightwave Technology
Abbreviated source title:J Lightwave Technol
Issue date:2023
Publication year:2023
Pages:1-8
Language:English
ISSN:07338724
E-ISSN:15582213
CODEN:JLTEDG
Document type:Article in Press
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">The antiradiation effect and evolution process of color center defects in hydrogen-treated Er<sup>3&#x002B;</sup>&#x002F;Al<sup>3&#x002B;</sup>&#x002F;Ge<sup>4&#x002B;</sup> codoped fiber under radiation were studied. The radiation-induced absorption spectra and continuous wave electron paramagnetic resonance spectra of glass slice samples were tested to explain the mechanism of internal defect transformation. The hydrogen treatment reduces radiation-induced absorption and increases loss in the working band by the combination of the Ge-related short wavelength absorption edge effect and the absorption peak of hydrogen vibration. Thus, there is an optimal hydrogen concentration for decreasing the radiation-induced gain variation (RIGV) of optical fibers, and the fiber with 3&#x00D7;10<sup>19</sup> cm<sup>-3</sup> hydrogen content had the lowest RIGV of approximately 0.038 dB&#x002F;krad. The radiation-induced absorption and continuous wave electron paramagnetic property revealed that the hydrogen treatment suppresses Al-OHC and Ge dangling bands in optical fibers. Hydrogen also generates H(I), Si-E&#x0027;, and Ge-E&#x0027; defects in the irradiation environment. This work helps to elucidate how hydrogen improves the radiation resistance of Er<sup>3&#x002B;</sup>&#x002F;Al<sup>3&#x002B;</sup>&#x002F;Ge<sup>4&#x002B;</sup> codoped silica fibers.<br/></div> IEEE
Main heading:Paramagnetic resonance
Controlled terms:Aluminum compounds - Color centers - Doping (additives) - Electron resonance - Electron spin resonance spectroscopy - Erbium doped fiber amplifiers - Germanium - Glass - Optical fibers - Paramagnetism  - Radiation effects - Silica
Uncontrolled terms:Co-doped - Erbium- doped fibers - Erbium-doped fiber - Germaniums (Ge) - Hydrogen loadings - Optical fiber networks - Optical fibers amplifiers - Radiation resistance - Radiation-induced absorption
Classification code:549.3  Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 701.2  Magnetism: Basic Concepts and Phenomena - 741.1.2  Fiber Optics - 741.3  Optical Devices and Systems - 744.7  Laser Components - 801  Chemistry - 812.3  Glass - 933.1  Crystalline Solids
Numerical data indexing:Decibel 3.80E-02dB, Size 1.90E-01m
DOI:10.1109/JLT.2023.3275982
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 102>
 
Accession number:20232214173394
Title:Monolithic scintillator PET detector by using light sharing between adjacent detector modules
Authors:Sun, M.D. (1); Zhang, C.H. (2); He, Z. (1); Wang, H.J. (1) 
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) Center for Advanced Material Diagnostic Technology, Shenzhen Technology University, Shenzhen; 518118, China 
Corresponding author:Sun, M.D.(sunmingdao@opt.ac.cn)
Source title:Journal of Instrumentation
Abbreviated source title:J. Instrum.
Volume:18
Issue:5
Issue date:May 1, 2023
Publication year:2023
Article number:P05044
Language:English
E-ISSN:17480221
Document type:Journal article (JA)
Publisher:Institute of Physics
Abstract:<div data-language="eng" data-ev-field="abstract">A monolithic crystal-based positron emission tomography (PET) detector has a low cost and high sensitivity and allows determining 3D positions by scintillation light distribution. However, the edge effect inherent to scintillators deteriorates the position resolution of the detector toward the crystal borders due to the escape and reflection of the scintillation light. An increase in crystal thickness will improve the detection efficiency, but the edge effect becomes severe. To improve the position resolution and detection efficiency of scintillators, the light-sharing technique is developed. Two identical trapezoidal monolithic cerium-doped lutetium yttrium orthosilicate (LYSO) crystals with a bottom size of 25.80 &times; 25.80 mm<sup>2</sup> and a thickness of 20 mm are optically coupled at one lateral face by an optical medium. The scintillation light near the optically coupled interface is jointly collected by two adjacent 8 &times; 8 SiPM arrays from the bottom faces. The SiPM signals are individually read out and processed by using the multichannel readout application-specific integrated circuits (ASICs) of TOFPET2 to provide a light distribution. The transverse positions and depth of interaction (DOI) are calculated from the measured light distribution. As expected, the optical glue with a refractive index of n = 1.68 shows better light sharing between two LYSO crystals than the coupling media of silicon grease (n = 1.40) and air. For the 20 mm thick monolithic LYSO-based PET detector, the transverse position resolution near the crystal edge is improved by nearly 30% by using the light-sharing method compared with the black-painted treatment. However, the DOI resolution near the edge of the crystal is not significantly improved, which may be attributed to the incomplete collection of scintillation light. The DOI resolution of the detector would be improved by using electronics with lower noise and SiPM arrays with smaller pixel.<br/></div> &copy; 2023 IOP Publishing Ltd and Sissa Medialab.
Number of references:16
Main heading:Positron emission tomography
Controlled terms:Crystals - Efficiency - Integrated circuit design - Ionization - Lutetium compounds - Refractive index - Scintillation - Scintillation counters - Yttrium compounds
Uncontrolled terms:Construction technologies - CT angiography - Design and construction - Design technologies - Detector design - Detector design and construction technology and material - Emission process - Gamma camera, SPECT, positron emission tomography positron emission tomography/CT, coronary CT angiography - Gamma-camera - Liquid scintillator  - Scintillator, scintillation and light emission process (solid, gas and liquid scintillator)
Classification code:714.2  Semiconductor Devices and Integrated Circuits - 741.1  Light/Optics - 802.2  Chemical Reactions - 913.1  Production Engineering - 933.1  Crystalline Solids - 944.7  Radiation Measuring Instruments
Numerical data indexing:Percentage 3.00E+01%, Size 2.00E-02m, Size 2.58E-02m
DOI:10.1088/1748-0221/18/05/P05044
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 103>
 
Accession number:20232514272482
Title:Unsupervised real image super-resolution via knowledge distillation network
Authors:Yuan, Nianzeng (1); Sun, Bangyong (1); Zheng, Xiangtao (2) 
Author affiliation:(1) School of Computer Science and Engineering, Xi'an University of Technology, Xi'an, Shannxi; 710048, China; (2) Key Laboratory of Spectral Imaging Technology CAS, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, Shaanxi; 710119, China 
Corresponding author:Zheng, Xiangtao(xiangtaoz@gmail.com)
Source title:Computer Vision and Image Understanding
Abbreviated source title:Comput Vision Image Understanding
Volume:234
Issue date:September 2023
Publication year:2023
Article number:103736
Language:English
ISSN:10773142
E-ISSN:1090235X
CODEN:CVIUF4
Document type:Journal article (JA)
Publisher:Academic Press Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Super-resolution convolutional neural networks recently have demonstrated high-quality restoration for single images. Despite existing methods have achieved remarkable performance based on synthetic datasets, the performance is poor on real-world or natural data. To address this issue, zero-shot super-resolution (ZSSR) has been proposed for adaptive learning. However, ZSSR is unable to keep the simulated degradation process consistent with the degradation kernel of the real degradation process. Furthermore, the learned mapping of ZSSR is different from the desired mapping. In this paper, an unsupervised image super-resolution via knowledge distillation network (USRKDN) is proposed. Specifically, the proposed degradation module generates an image-specific degradation kernel and corresponding degenerated images. Moreover, the knowledge distillation module is proposed to solve the issue that the mapping cannot be completely equivalent, which transfers the learned map by knowledge distillation. The full convolution module is also explored to help the reconstruction of information. Extensive experimental results on synthetic and real datasets demonstrate the effectiveness of USRKDN. In addition, USRKDN is proven to be good at reconstructing image details in real scenes, which provides an effective method for generating information learning tasks with fewer samples.<br/></div> &copy; 2023 Elsevier Inc.
Number of references:50
Main heading:Distillation
Controlled terms:Convolution - Convolutional neural networks - Image reconstruction - Mapping - Optical resolving power - Restoration - Zero-shot learning
Uncontrolled terms:Convolutional neural network - Degradation module - Degradation process - High quality - Image super resolutions - Knowledge distillation - Real images - Single images - Superresolution - Synthetic datasets
Classification code:405.3  Surveying - 716.1  Information Theory and Signal Processing - 741.1  Light/Optics - 802.3  Chemical Operations
DOI:10.1016/j.cviu.2023.103736
Funding details:  Number: 2022ZDLGY01-03, Acronym: -, Sponsor: -;Number: 62076199,62241604, Acronym: -, Sponsor: -;Number: SKLST202005,SKLST202214, Acronym: -, Sponsor: -;Number: KF202118, Acronym: -, Sponsor: -;Number: 22GXFW0088, Acronym: -, Sponsor: -;
Funding text:This work was supported in part by the National Natural Science Foundation of China under Grant 62076199 and 62241604 , in part by the Key R&D project of Shaanxi Province under Grant 2022ZDLGY01-03 , in part by the Open Research Fund of State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences under Grant SKLST202214 and SKLST202005 , in part by the Foundation of Key Laboratory of Pulp and Paper Science and Technology of Ministry of Education, Qilu University of Technology (Shandong Academy of Sciences) under Grant KF202118 , and in part by Xi&rsquo;an science and technology research plan under Grant 22GXFW0088 .This work was supported in part by the National Natural Science Foundation of China under Grant 62076199 and 62241604, in part by the Key R&D project of Shaanxi Province under Grant 2022ZDLGY01-03, in part by the Open Research Fund of State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences under Grant SKLST202214 and SKLST202005, in part by the Foundation of Key Laboratory of Pulp and Paper Science and Technology of Ministry of Education, Qilu University of Technology (Shandong Academy of Sciences) under Grant KF202118, and in part by Xi'an science and technology research plan under Grant 22GXFW0088.
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 104>
 
Accession number:20231713945967
Title:Research on Laser Cold Machining Hole Penetration Spectroscopy Detection Technology
Title of translation:&#28608; &#20809; &#20919; &#21152; &#24037; &#23380; &#31359; &#36879; &#20809; &#35889; &#26816; &#27979; &#25216; &#26415; &#30740; &#31350;
Authors:Yan, Qing (1); Peng, Bo (1); Wang, Li (1); Wang, Dong (1); Zhao, Hualong (2); Gao, Fei (1); Hua, Dengxin (1) 
Author affiliation:(1) School of Mechanical and Precision Instrument Engineering, Xi'an University of Technology, Xi'an; 710048, China; (2) Research Center for Photonic Manufacturing System and Application, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China 
Corresponding author:Wang, Li(wlfuyun@xaut.edu.cn)
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:52
Issue:3
Issue date:March 2023
Publication year:2023
Article number:0352119
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">The ultra-high peak power and ultra-short pulse time characteristics of the femtosecond laser allow it to act quickly on a specific area during machining&#65292;and the material in the area of the laser beam is removed in the form of a plasma eruption to achieve cold machining with almost no thermal impact on the surrounding material. Laser cold machining technology is widely used because of its high processing accuracy&#65292;small heat-affected zone and high machining efficiency. One of the important applications is the machining of air film holes in aero-engine turbine blades. Due to the existence of hollow cavities and the close distance between the opposite walls of the aero-engine turbine blades&#65292;the hole making process is prone to contramural damage. Therefore&#65292;in order to avoid contramural damage and improve the quality of air film hole machining&#65292;a real-time detecting system needs to be developed to judge the hole penetration status during the hole machining in real time. Laser Induced Breakdown Spectroscopy&#65288;LIBS&#65289;is a kind of atomic emission spectroscopy technology&#65292;which has a fast response time and can achieve real-time detection and analysis of the target under test. In the LIBS detection system&#65292;a spectrometer is used to collect the emission spectra excited during the plasma cooling process of femtosecond laser machining&#65292;and the elements corresponding to each spectral line can be identified according to the characteristic wavelength of atomic or ion emission spectra in a specific wavelength band&#65292;and quantitative analysis can be achieved by measuring the intensity of emission spectra captured at a specific wavelength. Aiming at the problem of contramural damage in the machining of aero-engine turbine blade with femtosecond laser&#65292; a hole penetration detection scheme based on laser-induced breakdown spectroscopy detection technology of femtosecond laser hole making is proposed. Based on the elemental analysis of the material and the information of the LIBS spectrogram obtained in the wavelength 520~560 nm during processing&#65292;the emission spectrum of Cr&#65288;I&#65289;521.531 nm is selected as the characteristic spectral line&#65292;and the change in intensity of the characteristic spectral line is used to realize the judgment of the hole machining process. In this paper&#65292;we design a laser cold machining hole penetration spectroscopy detection system consisting of an ultrashort pulse laser&#65292;a grating spectrometer&#65292;a focusing optical path and an upper computer for data processing and analysis. The effect of important machining parameters on the detection performance of LIBS is studied experimentally&#65292;and the effect of machining parameters on the spectral intensity is analyzed&#65292;and the optimized machining parameters are selected as laser energy of 32 W&#65292;the distance of the part to be processed from the focus of 150 mm&#65292;and the laser spin speed of 2 400 r/min. The designed hole penetration detection system is used to continuously collect and analyze the plasma spectra during the actual hole machining&#65292;and the correspondence between the specific spectral intensity and the penetration state of the sample to be processed in the hole machining is obtained. The intensity of the spectrum peaks at the beginning of the hole punching because of the high percentage of upward reflection of the atomic emission spectra during the laser exit stage&#65307;the overall intensity of the atomic emission spectra gradually decreases as the hole depth increases&#65307;the detected intensity of the atomic emission spectra starts to decrease significantly when the hole starts to penetrate gradually&#65307;when the hole is completely penetrated&#65292;there are no reflected back characteristic spectral lines and only background noise with spectral line intensity less than 230. The experimental results verify the feasibility of the method in solving the problem of preventing damage to the opposite wall during femtosecond laser hole machining&#65292;and can provide real-time feedback on the completion of hole processing to help the development of the feedback system&#65292;which is conducive to the further optimization of laser cold machining technology in terms of accuracy and efficiency.<br/></div> &copy; 2023 Chinese Optical Society. All rights reserved.
Number of references:17
Main heading:Damage detection
Controlled terms:Aircraft engines - Atomic emission spectroscopy - Engines - Heat affected zone - Laser damage - Laser induced breakdown spectroscopy - Spectroscopic analysis - Spectrum analysis - Turbomachine blades - Ultrashort pulses
Uncontrolled terms:Aeroengine turbine - Characteristic spectral lines - Contramural damage - Detection system - Emission spectrums - Holes machining - Laser cold machining - Laserinduced breakdown spectroscopy (LIBS) - Penetration detection - Turbine blade
Classification code:538.2  Welding - 653.1  Aircraft Engines, General - 744.8  Laser Beam Interactions - 801  Chemistry - 931.1  Mechanics
Numerical data indexing:Size 5.20E-07m to 5.60E-07m, Size 5.21531E-07m, Angular velocity 6.68E+00rad/s, Power 3.20E+01W, Size 1.50E-01m
DOI:10.3788/gzxb20235203.0352119
Funding details:  Number: 22JY049, Acronym: -, Sponsor: -;Number: 2021YFF0701103, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;
Funding text:National Key Research and Development Program of China&#65288;No. 2021YFF0701103&#65289;&#65292;Key Project of Scientific Research Plan of Education Department of Shaanxi Provincial Government&#65288;No. 22JY049&#65289;
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 105>
 
Accession number:20232614326644
Title:Real-time image processing of space camera based on FPGA
Authors:Duan, Jia Xin (1, 2); Zhang, Hai Feng (2, 3); Zhou, Shun (1); Huang, Ji Jiang (2) 
Author affiliation:(1) Xi'an Technological University, School of Opto-electronical Engineering, Shanxi, Xi'an; 710119, China; (2) Xi'an Institute of Optics and Precision Mechanics of UCAS, University of Chinese Academy of Sciences, Shanxi, Xi'an; 710119, China; (3) XI'An Key Laboratory of Spacecraft Optical Imaging and Measurement Technology, Shanxi, Xi'an; 710119, China 
Corresponding author:Zhang, Hai Feng(Zhanghf@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12700
Part number:1 of 1
Issue title:International Conference on Electronic Information Engineering and Data Processing, EIEDP 2023
Issue date:2023
Publication year:2023
Article number:1270022
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510666160
Document type:Conference article (CA)
Conference name:2023 International Conference on Electronic Information Engineering and Data Processing, EIEDP 2023
Conference date:March 17, 2023  -  March 19, 2023
Conference location:Nanchang, China
Conference code:189234
Sponsor:Sichuan University
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">According to the characteristics of space camera subject to working environment and task requirements, the automatic exposure and automatic white balance are analyzed theoretically. Gaussian weight is used to correlate the target position and gray value of image, and the relationship between variable step size adjustment, balance accuracy and speed of automatic exposure is optimized. Automatic white balance performs color temperature estimation in RGB space, enabling accurate image color restoration under different illumination. The optimized design of hardware implementation according to the FPGA characteristics. Through the simulation software analysis and the effect of the hardware system display pictures, it is shown that the FPGA hardware system can run high-definition real-time, fast speed, low power consumption and strong practicability. This hardware system has been used in image processing of space cameras.<br/></div> &copy; 2023 SPIE.
Number of references:10
Main heading:Field programmable gate arrays (FPGA)
Controlled terms:Cameras - Computer software - Image processing
Uncontrolled terms:Automatic exposure - Automatic white balance - Camera-based - Gaussian weight - Hardware system - Position value - Real-time image processing - Space cameras - Target position - Working environment
Classification code:721.2  Logic Elements - 723  Computer Software, Data Handling and Applications - 723.2  Data Processing and Image Processing - 742.2  Photographic Equipment
DOI:10.1117/12.2682281
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 106>
 
Accession number:20230613549807
Title:Theoretical and experimental study on responsivity of ultra-fast X-ray semiconductor chip based on the rad-optic effect
Authors:Yan, Xin (1, 2); Wang, Tao (2); Wang, Gang (2); Yao, Dong (1, 2); Liu, Yiheng (2); Gao, Guilong (2); Xin, Liwei (1, 2); Yin, Fei (2); Tian, Jinshou (2); Chang, Xinlong (1); He, Kai (2) 
Author affiliation:(1) Rocket Force University of Engineering, Xi'an; 710025, China; (2) Key Laboratory of Ultra-fast Photoelectric Diagnostics Technology, Xi'an Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences (CAS), Shaanxi, Xi'an; 710119, China 
Corresponding author:Chang, Xinlong(xinlongch@vip.sina.com)
Source title:Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Abbreviated source title:Nucl Instrum Methods Phys Res Sect A
Volume:1049
Issue date:April 2023
Publication year:2023
Article number:168070
Language:English
ISSN:01689002
CODEN:NIMAER
Document type:Journal article (JA)
Publisher:Elsevier B.V.
Abstract:<div data-language="eng" data-ev-field="abstract">Semiconductor sensors based on the rad-optic effect enable ultra-fast detection of X-rays and play an important role in fusion diagnostics. Obtaining the responsivity of the semiconductor ultrafast response material is an important part of characterization. In this work, the refractive index change mechanism of the semiconductor under X-ray irradiation was analyzed, and the quantitative relationship between the diffraction efficiency and the X-ray photon energy was established through the LT-AlGaAs diffraction imaging experiments. The impulse responses of LT-AlGaAs under 1 keV&ndash;10 keV X-ray radiation were calculated, revealing the variation of responsivity with radiated photon energy. Imaging experiments of LT-AlGaAs were performed by bombarding an Al target to generate 1.5 keV X-rays. The diffraction images were obtained in agreement with the simulations. The responsivity of the semiconductor chip increases with the square of the incident X-ray power density. This study provides meaningful analyses for the development of ultra-fast X-ray imaging systems based on the rad-optic effect.<br/></div> &copy; 2023 Elsevier B.V.
Number of references:20
Main heading:X ray detectors
Controlled terms:Aluminum gallium arsenide - Diffraction - Gallium compounds - Photons - Refractive index
Uncontrolled terms:Chip based - Imaging experiments - Rad-optic effect - Responsivity - Semiconductor chips - Ultra-fast - Ultrafast measurements - Ultrafast response - Ultrafast response semiconductor material - X-ray detector
Classification code:712.1.2  Compound Semiconducting Materials - 741.1  Light/Optics - 931.3  Atomic and Molecular Physics
Numerical data indexing:Electron volt 1.00E+03eV to 1.00E+04eV, Electron volt 1.50E+03eV
DOI:10.1016/j.nima.2023.168070
Funding details:  Number: -, Acronym: -, Sponsor: Eesti Teaduste Akadeemia;Number: 12075312,62005311, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: GJJSTD2022006,XDA25030900, Acronym: CAS, Sponsor: Chinese Academy of Sciences;
Funding text:This work was supported by the National Natural Science Foundation of China, China (Grant Nos. 12075312 and 62005311), by the Science Instrument Developing Project ofChinese Academy of Sciences, China (Grant No. GJJSTD2022006) and the Strategic Priority Program of Chinese Academy of Sciences, China (Grant No. XDA25030900).This work was supported by the National Natural Science Foundation of China, China (Grant Nos. 12075312 and 62005311 ), by the Science Instrument Developing Project of Chinese Academy of Sciences, China (Grant No. GJJSTD2022006 ) and the Strategic Priority Program of Chinese Academy of Sciences, China (Grant No. XDA25030900 ).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 107>
 
Accession number:20231713946002
Title:F/0.78 High Order Aspheric Surface Testing with Null Compensator and Mapping Distortion Correction
Title of translation:F/0.78 &#39640;&#27425;&#38750;&#29699;&#38754;&#38646;&#20301;&#34917;&#20607;&#26816;&#27979;&#19982;&#25237;&#24433;&#30072;&#21464;&#26657;&#27491;
Authors:Hao, Sanfeng (1, 2); Zhang, Jian (1, 3); Yang, Jianfeng (1) 
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Xidian University, School of Mechano-electronic Engineering, Xi'an; 710071, China 
Corresponding author:Zhang, Jian(zj@opt.ac.cn)
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:52
Issue:2
Issue date:February 2023
Publication year:2023
Article number:0212004
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">Compared with traditional spherical surfaces&#65292;aspheric surfaces own more degrees of freedom&#65292;which is beneficial to the light weight&#65292;integration and aberration correction of an optical system. In recent years&#65292;with the development and progress of high-precision optical manufacturing technology&#65292;aspheric surfaces have been widely used in the optical systems design in aerospace&#65292;space telephoto and other fields. Meanwhile&#65292;the testing of aspheric surfaces&#65292;especially high-order aspheric surfaces&#65292;is more difficult and is a prerequisite for guiding optical deterministic manufacturing. That is to say&#65292;it is not only necessary to realize the testing of aspheric surfaces&#65292;but also to be able to give correct guidance for manufacturing based on the testing results. At present&#65292;aspheric surfaces testing can be achieved with null lens compensator&#65292;but for high-order aspheric surfaces with a small F-number&#65292;traditional two-piece lens compensator cannot meet the testing accuracy requirements&#65292;and the structure of null lens needs to be further optimized. What's more&#65292;the shape of interfermetric image obtained with null lens compensator is inconsistent with that of the mirror under test&#65292; that is&#65292; mapping distortion. It is worth noting that deterministic manufacturing techniques such as Computer-Controlled Optical Surfacing &#65288;CCOS&#65289;&#65292; Magnetorheological Finishing &#65288;MRF&#65289;&#65292;and Ion Beam Figuring&#65288;IBF&#65289; all require accurate guidance and feedback from interfermetric image&#65292;position errors caused by mapping distortion will seriously affect manufacturing efficiency&#65292;and even lead to a failure. Therefore&#65292;the mapping distortion correction is crucial for the interferometric image to correctly guide deterministic manufacturing. In this paper&#65292;not only the design method of high-order aspheric null lens compensator is discussed&#65292;but also the mapping distortion correction of interferometric image. Firstly&#65292;based on third-order aberration theory and PW method&#65292;the initial structure calculation formula of the high-order aspheric three-piece lens compensator is deduced&#65292;and the above formula is programmed&#65292;which facilitates the null lens compensator design. For an 8th-order even-order aspheric surface with an effective diameter of 314 mm and F/0.78&#65292;the initial structural parameters of null lens compensator were obtained by using the calculation formula. Then&#65292;it is substituted into the optical design software for scaling and optimization&#65292;and finally the design result with PV=0.0096&lambda;&#65292;RMS=0.0012&lambda; &#65288;&lambda;=632.8 nm&#65289;can be obtained&#65292;which can meet the high-precision testing requirements. Furthermore&#65292;a correction method is proposed to solve the problem of mapping distortion in the interferometric image obtained with null lens compensator. This method combines imaging distortion of null lens and an algorithm for solving null distortion point coordinates&#65292;which can conveniently realize the rapid mapping distortion correction. On the one hand&#65292;null lens imaging system with high-order aspheric surfaces as object can be obtained by reversing the testing light path&#65292;and the imaging distortion is consistent with the mapping distortion&#65292;which can be used for mapping distortion correction. On the other hand&#65292;since the null distortion point is also the geometric center of the interfermetric image&#65292;the least squares method is used to fit the circle boundary in combination with the boundary data of interfermetric image&#65292;and then the null distortion point can be obtained. Then&#65292;The correction method is used to correct the mapping distortion of the interferometeric image obtained by null lens compensator. After 6 times of magnetorheological finishing based correction results&#65292;the surface RMS reduced from 0.270&lambda; to 0.019&lambda;&#65292;which verifies the validity and efficiency of this correction method.<br/></div> &copy; 2023 Chinese Optical Society. All rights reserved.
Number of references:24
Main heading:Aspherics
Controlled terms:Aberrations - Degrees of freedom (mechanics) - Interferometry - Ion beams - Lenses - Magnetorheological fluids - Mapping - Mirrors - Optical design - Optical systems  - Optical testing - Polishing
Uncontrolled terms:Compensator design - Deterministic polishing - Distortions corrections - High-order aspheric surfaces - Mapping distortion - Mapping distortion correction - Null lens - Null testing - Optical deterministic polishing - Optical-
Classification code:405.3  Surveying - 604.2  Machining Operations - 708.4  Magnetic Materials - 741.1  Light/Optics - 741.3  Optical Devices and Systems - 931.1  Mechanics - 932.1  High Energy Physics - 941.4  Optical Variables Measurements
Numerical data indexing:Capacitance 3.14E+02F, Size 6.328E-07m
DOI:10.3788/gzxb20235202.0212004
Funding details:  Number: 2018ZDXM-GY-105, Acronym: -, Sponsor: Key Technology Research and Development Program of Shandong;
Funding text:CAS "Light of West China" Program&#65288;No. XAB2016A10&#65289;&#65292;Key Program of Research and Development of Shanxi Province of China&#65288;No. 2018ZDXM-GY-105&#65289;
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 108>
 
Accession number:20232114124231
Title:Regulatory method of 3D Multi-focus Controllable Distribution Based on Computer Generated Holography
Authors:Zhang, Ruidi (1, 2); Chen, Xiaoyi (1, 3); Duan, Yaxuan (1, 3); Wang, Pu (1, 3); Da, Zhengshang (1, 3) 
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shaanxi, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Xi'an Key Laboratory of High Power Laser Measurement Technology and Instruments, Shaanxi, Xi'an; 710119, China 
Corresponding author:Da, Zhengshang(dazhengshang@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12595
Part number:1 of 1
Issue title:Advanced Fiber Laser Conference, AFL 2022
Issue date:2023
Publication year:2023
Article number:125951U
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510663145
Document type:Conference article (CA)
Conference name:2022 Advanced Fiber Laser Conference, AFL 2022
Conference date:November 11, 2022  -  November 13, 2022
Conference location:Changsha, China
Conference code:187972
Sponsor:The Chinese Society for Optical Engineering
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">Traditional analytical algorithm needs to combine the transmission functions of grating and lens to generate a computer generated hologram (CGH), so as to realize the distribution of three-dimensional (3D) multi-focal points in space, but the grating phase will inevitably produce high-order diffraction focus, resulting in energy loss, and the traditional analytic algorithm is more suitable for generating array multi-focal distribution with equal spacing. To solve this problem, this paper simplifies the traditional analytical algorithm, and proposes a method that only uses multi-lens phase and random phase superposition to generate the CGH required by the target light location, by changing the focal length of the lens phase, the multi-focus distribution along the z-axial direction of multiple independent focal planes is realized. Then the phase of these different focal planes is superimposed, and a 0~2&pi; random phase modulation is added, which can quickly generate 3D multi-focus distribution with controllable number and position. The simulation results show that the energy uniformity of focal spot on each focal plane is between 89.45% and 98.08%. The experimental results show that the energy uniformity of focal spots on each focal plane is between 88.40% and 96.13%, which is consistent with the simulation results. Compared with traditional analytical algorithm, the proposed method is more universal for multi-focus distribution in 3D space without special requirements of array distribution with equal spacing, and has potential application value in laser processing, holographic optical tweezers, optical communication and other fields.<br/></div> &copy; 2023 SPIE.
Number of references:16
Main heading:Optical communication
Controlled terms:Computer generated holography - Diffraction gratings - Energy dissipation - Femtosecond lasers - Focusing - Holograms - Light modulators - Optical signal processing - Optical tweezers
Uncontrolled terms:3d multi-focus - Analytic algorithm - Analytical algorithms - Computergenerated holograms (CGH) - Energy - Femtosecond laser processing - Focal Plane - Multi-focus - Optical field modulations - Random-phase
Classification code:525.4  Energy Losses (industrial and residential) - 717.1  Optical Communication Systems - 723.5  Computer Applications - 741.3  Optical Devices and Systems - 743  Holography - 743.1  Holographic Techniques - 744.1  Lasers, General - 744.9  Laser Applications
Numerical data indexing:Percentage 8.84E+01% to 9.613E+01%, Percentage 8.945E+01% to 9.808E+01%
DOI:10.1117/12.2668871
Funding details:  Number: -, Acronym: -, Sponsor: Key Technology Research and Development Program of Shandong;Number: 61705254, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2021YFC2203501, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;
Funding text:In this paper, the research was sponsored by National Natural Science Foundation of China (No.61705254), National Key R&D Program of China (No.2021YFC2203501), Key Research and Development Program of Shaanxi Province of China (No.2020GY-114).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 109>
 
Accession number:20231413849337
Title:VCSEL Cavity Loss and Gain Measurement for High-Speed Optical Interconnects
Authors:Wang, Binhao (1); Sorin, Wayne V. (2); Tan, Michael R.T. (3) 
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi&#x0027;an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi&#x0027;an, China; (2) Hewlett Packard Labs, Hewlett Packard Enterprise, Milpitas, CA, USA; (3) Lumentum, San Jose, CA, USA 
Source title:Journal of Lightwave Technology
Abbreviated source title:J Lightwave Technol
Issue date:2023
Publication year:2023
Pages:1-7
Language:English
ISSN:07338724
E-ISSN:15582213
CODEN:JLTEDG
Document type:Article in Press
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Over 100&#x00A0;Gb/s Four-level Pulse-Amplitude Modulation (PAM4) Vertical-Cavity Surface-Emitting Laser (VCSEL) based optical interconnects require high speed, damped, and low relative intensity noise (RIN) VCSELs. Measurement techniques for intrinsic parameters are essential for optimizing VCSEL designs. The proposed VCSEL cavity round-trip loss and gain coefficient measurement provides the insight of VCSEL distributed Bragg reflectors (DBRs) and quantum well (QW) design. A simple VCSEL cavity model is described and excellent matching between the model and measurement is achieved.<br/></div> IEEE
Main heading:Surface emitting lasers
Controlled terms:Laser mirrors - Laser pulses - Optical interconnects - Optical waveguides - Quantum well lasers - Reflection - Semiconductor quantum wells - Transceivers
Uncontrolled terms:Cavity loss - High Speed - High speed optical interconnects - High-low - Laser-based - Loss measurement - Low relative intensity noise - Optical interconnect - Vertical-cavity surface emitting laser
Classification code:714.2  Semiconductor Devices and Integrated Circuits - 714.3  Waveguides - 716.3  Radio Systems and Equipment - 741.3  Optical Devices and Systems - 744.1  Lasers, General - 744.7  Laser Components
DOI:10.1109/JLT.2023.3262193
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 110>
 
Accession number:20230713574415
Title:Study on the influence of spectral overflow and its correction method of push broom static hadamard transform spectral imager
Authors:Zhou, Yingshu (1, 2); Gao, Xiaohui (1); Liu, Jie (1); Liu, Xuebin (1) 
Author affiliation:(1) Xi an Institute of Optics and Precision Mechanics of CAS, Xi'an; 710119, China; (2) University of Chinese Academy of Science, Beijing; 100049, China 
Corresponding author:Gao, Xiaohui(gaoxhui@163.com)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12558
Part number:1 of 1
Issue title:AOPC 2022: Optical Spectroscopy and Imaging
Issue date:2023
Publication year:2023
Article number:1255807
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510662308
Document type:Conference article (CA)
Conference name:2022 Applied Optics and Photonics China: Optical Spectroscopy and Imaging, AOPC 2022
Conference date:December 18, 2022  -  December 19, 2022
Conference location:Virtual, Online, China
Conference code:186190
Sponsor:Chinese Society for Optical Engineering (CSOE)
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">Hadamard transform spectral imaging technology has high signal-To-noise ratio and the advantage in energy distribution. In recent decades, related works focus on dynamic coding Hadamard spectral imager instead of static coding ones. The latter has great potential value in spaceborne and airborne applications, but the accuracy of its restored spectral image data is poor at present. Therefore, it is necessary to further study the formation mechanism and correction method of errors in static coding Hadamard spectral imager. In this paper, the influencing mechanism and correction method of spectral overflow are studied. Firstly, the imaging and restoration process of the Hadamard coding spectral imager with spectral overflow is mathematically deduced, and the conclusion is compared with the simulated restoration results. Secondly, the simulated results are compared with the experimental data, verifying that spectral overflow is an important source of the error in experimental results. Finally, a correction method for eliminating spectral overflow errors under certain conditions is proposed, and the effectiveness of the method is verified by simulation. This paper can provide reference for the design and data restoration of static coding Hadamard spectral imager.<br/></div> &copy; COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.
Number of references:12
Main heading:Image reconstruction
Controlled terms:Error correction - Hadamard transforms - Image coding - Restoration - Signal encoding - Signal to noise ratio
Uncontrolled terms:Encodings - Errors correction - Hadamard - Hadamard encoding - Push broom - Simulation - Spectral image restoration - Spectral images - Spectral imaging - Spectral overflow
Classification code:716.1  Information Theory and Signal Processing - 921.1  Algebra
DOI:10.1117/12.2647236
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 111>
 
Accession number:20232114127038
Title:Free-form surface reconstruction of off-axis three mirror optical system based on Rhino
Authors:Chang, Lingying (1); Chen, Kui (1); Zhao, Yuhang (1); Qiu, Yuehong (2); Wang, Guanru (1); Wang, Xinyou (1) 
Author affiliation:(1) Xi'an University of Post and Telecommunications, Xi&rsquo;an; 710121, China; (2) Xi&rsquo;an Institute Optics and Precision Mechanics, Chinese Academy of Sciences, Xi&rsquo;an; 710119, China 
Corresponding author:Chang, Lingying(sophia_chang@126.comTel)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12565
Part number:1 of 1
Issue title:Conference on Infrared, Millimeter, Terahertz Waves and Applications, IMT 2022
Issue date:2023
Publication year:2023
Article number:125653S
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510662476
Document type:Conference article (CA)
Conference name:2022 Conference on Infrared, Millimeter, Terahertz Waves and Applications, IMT 2022
Conference date:September 20, 2022  -  September 22, 2022
Conference location:Xi'an, China
Conference code:188255
Sponsor:Chinese Society for Optical Engineering (CSOE)
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">With the development of modern space optical system, off-axis reflective system with wide spectrum, high resolution and large field of view has become the main direction of optical design. However, the off-axis property of off-axis reflective structure brings asymmetric aberration, which makes designers use free-form surface frequently to correct the aberration of optical system and improve the imaging quality. When the Trace Pro optical mechanical simulation software cannot accurately convert the optical system with free-form surface in CODE V, it is difficult to simulation stray light and analysis environmental in the subsequent studies. The reconstruction of free-form surface of off-axis three mirror optical systems are realized by Rhino in this paper. For the free-form surface in the off-axis three mirror optical systems designed by CODE V, a uniform circular dot ring array sampling method based on polar coordinates is proposed to obtain the free-form surface point cloud data. The point deviation of 5mm-80mm was analyzed, and the optimal sampling interval for the point cloud data of XY polynomial free-form surface with an aperture of 150mm was determined to be 10mm; The NURBS method is used to reconstruct the free-form surface model in Rhino, and the free-form surface reconstruction of the off-axis three mirror optical system is modeled in Trace Pro. Through the simulation of imaging optical path and the analysis of image point dispersion spot radius, it is verified that the free-form surface model of off-axis three mirror optical system can be reconstructed based on rhino. This research provides an effective method reference for optical mechanical joint simulation analysis.<br/></div> &copy; 2023 SPIE.
Number of references:14
Main heading:Optical systems
Controlled terms:Aberrations - Codes (symbols) - Computer software - Mirrors - Optical design - Stray light - Surface measurement - Surface reconstruction
Uncontrolled terms:Free-form surface - Off-axis - Off-axis three mirror optical system - Optical free-form surface - Optical- - Point cloud data - Rhino - Surface modeling - Surfaces reconstruction - Trace pro
Classification code:723  Computer Software, Data Handling and Applications - 723.2  Data Processing and Image Processing - 741.1  Light/Optics - 741.3  Optical Devices and Systems - 943.2  Mechanical Variables Measurements
Numerical data indexing:Size 1.00E-02m, Size 1.50E-01m, Size 5.00E-03m to 8.00E-02m
DOI:10.1117/12.2663242
Funding details:  Number: 61475190, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:Project supported by National Natural Science Foundation of China(Grant No.61475190)
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 112>
 
Accession number:20225213290363
Title:Push-broom compressive hyperspectral imaging method based on self-fusion refinement
Authors:Zhu, Mengjun (1); Yi, Wenjun (1); Du, Junyi (2); Zhu, Shuyue (1); Qi, Junli (1); Fu, Meicheng (1); Li, Libo (3); Li, Xiujian (1) 
Author affiliation:(1) College of Sciences, National University of Defense Technology, deyaroad109, Changsha; 410073, China; (2) School of Computer Science and Technology, Xidian University, Xi'an; 710071, China; (3) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China 
Corresponding author:Yi, Wenjun(yiwenjun@nudt.edu.cn)
Source title:Optics Communications
Abbreviated source title:Opt Commun
Volume:530
Issue date:March 1, 2023
Publication year:2023
Article number:129198
Language:English
ISSN:00304018
CODEN:OPCOB8
Document type:Journal article (JA)
Publisher:Elsevier B.V.
Abstract:<div data-language="eng" data-ev-field="abstract">Compressive hyperspectral imaging (CHI) with random encoding mask usually suffers from various noises and artifacts. Inspired by the dual-camera CHI techniques based on hyperspectral (HS) and multispectral (MS) image fusion, herein, we present a single-camera push-broom CHI method based on self-fusion refinement (SFR). In this work, the MS guidance image for data fusion is derived directly from the raw solved HS data cube itself rather than any additional data source, which turns cross-fusion into self-fusion; furthermore, a modified joint bilateral filtering (JBF) fusion algorithm is developed to adapt this self-fusion problem, and an adaptive range Gaussian radius is adopted to avoid the invalidation or over-smoothing effects so as to ensure spatial and spectral improvement. The visualized and quantitative assessment results both demonstrate that the proposed method achieves high-quality HS imaging in terms of noise and artifact removal and spatial&ndash;spectral fidelity. Furthermore, the proposed method has a great flexibility and extensibility, whose performances highly depend on the exact fusion algorithm adopted, and a more suitable fusion algorithm will lead to better reconstruction quality; herein, the SFR process by the modified JBF achieves better performances than SFR by guided filtering (GF) or Markov random field (MRF).<br/></div> &copy; 2022 Elsevier B.V.
Number of references:33
Main heading:Cameras
Controlled terms:Hyperspectral imaging - Image enhancement - Image fusion - Markov processes - Nonlinear filtering - Structural frames
Uncontrolled terms:Bilateral filtering - Dual cameras - Encoding masks - Fusion algorithms - Hyperspectral imaging techniques - Imaging method - Modified joint bilateral filtering - Performance - Push-broom compressive hyperspectral imaging - Self-fusion refinement
Classification code:408.2  Structural Members and Shapes - 716.1  Information Theory and Signal Processing - 723.2  Data Processing and Image Processing - 742.2  Photographic Equipment - 746  Imaging Techniques - 922.1  Probability Theory
DOI:10.1016/j.optcom.2022.129198
Funding details:  Number: 11704411,62005207,62005317, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2019JJ40341,2021JJ40695, Acronym: -, Sponsor: Natural Science Foundation of&nbsp;Hunan Province;Number: 2020YFA0713504, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;
Funding text:This work was supported by the National Natural Science Foundation of China ( 62005317 , 11704411 , 62005207 ); Natural Science Foundation of Hunan Province, China ( 2019JJ40341 , 2021JJ40695 ); The National Key Research and Development Program of China (NKRDPC Grant NO. 2020YFA0713504 ).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 113>
 
Accession number:20230513536677
Title:Position linearity analysis of circular arc terminated resistive anode using finite element method for photon-counting imaging detectors    (Open Access)
Authors:Yang, Kai (1, 2); Bai, Yonglin (1, 2); Cao, Weiwei (1); Yang, Yang (1); Zhu, Bingli (1); Zheng, Jinkun (1); Bai, Xiaohong (1); Chen, Zhen (1); Wang, Bo (1, 2) 
Author affiliation:(1) Key Laboratory of Ultrafast Photoelectric Diagnostic Technology, Xi'an Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences (CAS), Beijing; 100049, China 
Corresponding author:Wang, Bo(wbo@opt.ac.cn)
Source title:Review of Scientific Instruments
Abbreviated source title:Rev. Sci. Instrum.
Volume:94
Issue:1
Issue date:January 1, 2023
Publication year:2023
Article number:013703
Language:English
ISSN:00346748
E-ISSN:10897623
CODEN:RSINAK
Document type:Journal article (JA)
Publisher:American Institute of Physics Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">This study proposes a comprehensive model of the circular arc terminated (CAT) resistive anode based on the finite element method to explore the dynamic process of charge diffusion on this anode and its position linearity performance. The waveforms of charges of the electrodes on the anode are calculated for different electrical parameters and their influence on positional linearity is investigated. The influence of the signal development time and the non-uniformity of the resistance per square of the anode on positional linearity is also analyzed. The results of simulations show that the non-linearity of the image varies monotonically with the termination resistance and the non-uniformity of the resistance per square of the anode, but has a non-linear relationship with the signal development time and the ratio of the resistance per square. A CAT resistive anode with capacitance c and a resistance per square of the sensitive area of R can be used to recover an image with a root mean-squared non-linearity of 2%, when the charge signals of the electrode are collected for at least 0.6R s. The reliability of the results of the simulations was verified with experimental measurements.<br/></div> &copy; 2023 Author(s).
Number of references:22
Main heading:Anodes
Controlled terms:Finite element method
Uncontrolled terms:Charge diffusion - Circular arc - Comprehensive modeling - Development time - Dynamic process - Imaging detector - Nonuniformity - Performance - Photon-counting imaging - Resistive anodes
Classification code:714.1  Electron Tubes - 921.6  Numerical Methods
Numerical data indexing:Percentage 2.00E+00%
DOI:10.1063/5.0118899
Funding details:  Number: 12027803,61904202, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This work was supported by the National Natural Science Foundation of China, under Grant Nos. 61904202 and 12027803.
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Hybrid Gold
 
<RECORD 114>
 
Accession number:20232614325902
Title:Design of optical system for wide-spectrum visible-short wave infrared imaging
Title of translation:&#23485;&#20809;&#35889;&#21487;&#35265;-&#30701;&#27874;&#32418;&#22806;&#25104;&#20687;&#20809;&#23398;&#31995;&#32479;&#35774;&#35745;
Authors:Xuan, Bin (1); Zhao, Zeyu (2); Luo, Yaowei (3); Wei, Qun (3); Zhu, Yixian (1); Wang, Yajun (4) 
Author affiliation:(1) School of Mechanical Engineering, Nantong University, Nantong; 226019, China; (2) Faculty of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an; 710049, China; (3) Nanjing Huaopt Technology CO. LTD, Nanjing; 210000, China; (4) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China 
Corresponding author:Wang, Yajun
Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering
Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.
Volume:52
Issue:4
Issue date:April 2023
Publication year:2023
Article number:20220638
Language:Chinese
ISSN:10072276
Document type:Journal article (JA)
Publisher:Chinese Society of Astronautics
Abstract:<div data-language="eng" data-ev-field="abstract">Objective The industrial lens for machine vision inspection needs not only to meet the design requirements of lightweight and large field of view, but also have high luminous flux. In this paper, based on the needs of machine vision engineering applications, an optical system for wide-spectrum visible-short wave infrared imaging is designed using the optical design software ZEMAX. The Wide spectrum visible-short wave infrared imaging system can operate in the band of 0.4-1.7 &mu;m. The system is composed of 7 groups of 10 lenses. The MTF value is greater than 0.4 at the Nyquist frequency of 100 lp/mm. The F number of the system is 2.8, and the distortion is less than 1.4%. All kinds of aberrations have been well corrected and balanced. And the system has good imaging performance. It has certain reference value for the design of similar optical systems. Methods The optical system structures are usually divided into refractive system, reflective system and hybrid system. Different optical system structures have their own advantages and disadvantages. According to the imaging performance of the system and the cost-performance ratio in industrial applications, the refractive system can meet the requirements of large field of view, low distortion and compact structure. The refractive system is used to observe through refraction of transmitted light, so it is widely used in optical structure selection. At the time, by using the conventional processing and adjustment methods, it can meet the accuracy requirements. It has the characteristics of stable image quality, small stray light and high element transmittance. Results and Discussions According to the actual needs of industrial testing, the main parameters to be considered in the structural design of the wide-spectrum visible-short wave infrared imaging optical system are lens material, working band, focal length, F number, field angle, total length of the system, etc. Based on the analysis of the parameters of the wide-band infrared imaging system, the resolution CMOS area array detector is 2 448&times;2 048. The pixel size is 3.45 &mu;m. The target size is 2/3 inch (1 inch=2.54 cm), and the lens has stable optical performance and good imaging quality in the operating temperature range of 0-50 &#8451;. After the initial structure of the system is determined, the design structure is further optimized using subsequent repeated aberration correction. The optimized wide-spectrum visible-short wave infrared imaging optical system is composed of 7 groups of lenses, and the number of the lenses is 10. The diaphragm is located on the rear surface of the fourth lens, and the front surface of the tenth lens is aspheric. The total length of the system is 79.6 mm, the diameter of the entrance pupil is 9.9 mm, and the F-number is 2.8. It can image in the visible light and short-wave infrared bands. After testing, the point array of the system's field of view is very close to the Airy spot, which is close to the diffraction limit, and meets the imaging requirements. The maximum astigmatism and field curvature of the system is 0.1 mm, and the maximum distortion is 1.4%, which meets the requirements of the system design for field curvature and distortion. The systematic tolerance is analysed based on diffraction MTF average. According to the experience and actual technological level, firstly, relatively loose tolerance preset value of each parameter is given, and then the tolerance analysis is carried out based on the design results, finally the particularly sensitive tolerance is found out and the tolerance is reallocated. Through Monte Carlo analysis of MTF, the results show that at 100 lp/mm, the nominal value of MTF is 0.559, the best value is 0.554, the worst value is 0.333, the average value is 0.481, and the standard deviation is 0.052, the MTF of 90% of the lens&ge; 0.410, the MTF of 50% of the lens &ge; 0.427, and the MTF of 10% of the lens&ge; 0.540. Based on the results, the MTF can meet the technical index requirements under the given tolerance. In order to better prove the performance of the optical system, the bruises in the interior of agricultural products are taken with a visible light band camera and a short-wave infrared camera respectively, which proved that the bruises can be clearly seen in the object image of this wavelength by SWIR imaging. The ability of SWIR to penetrate plastic was proved by shooting through plastic bottles. The experiment proves that the system has good detection effect in industrial detection. Conclusions With the increasing demand of machine vision for composite image information, the modern optical imaging technology will expand beyond the visible and near-infrared bands. Short-wave infrared will be more widely used in the future because of its resolution comparable to visible light and unique optical performance.<br/></div> &copy; 2023 Chinese Society of Astronautics. All rights reserved.
Number of references:14
Main heading:Optical design
Controlled terms:Application programs - Computer vision - Hybrid systems - Image resolution - Imaging systems - Lenses - Optical systems - Stray light - Thermography (imaging)
Uncontrolled terms:Broad spectrum - F/number - Large field of views - Light imaging - Machine-vision - Refractive systems - Short wave infrared - Visible light - Visible light imaging - Wide spectrum
Classification code:723  Computer Software, Data Handling and Applications - 723.5  Computer Applications - 741.1  Light/Optics - 741.2  Vision - 741.3  Optical Devices and Systems - 742.1  Photography - 746  Imaging Techniques - 921  Mathematics
Numerical data indexing:Percentage 1.00E+01%, Percentage 1.40E+00%, Percentage 5.00E+01%, Percentage 9.00E+01%, Size 1.00E-04m, Size 2.54E-02m, Size 3.45E-06m, Size 4.00E-07m to 1.70E-06m, Size 7.62E-02m, Size 7.96E-02m, Size 9.90E-03m
DOI:10.3788/IRLA20220638
Funding details:  Number: 61903204, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:National Natural Science Foundation of China (61903204)
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 115>
 
Accession number:20231013667052
Title:Proportional fairness secrecy beamforming for massive MIMO-SWIPT systems with low-resolution ADCs
Authors:Li, Hao (1); Cao, Jiawei (1); Li, Qi (1); Zhang, Shengyi (1); Zhao, Yijiu (1); Wang, Zhigang (1); Meng, Jiacheng (2, 3); Wang, Houjun (1) 
Author affiliation:(1) School of Automation Engineering, University of Electronic Science and Technology of China, Chengdu, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an, China; (3) University of Chinese Academy of Sciences, Beijing, China 
Corresponding authors:Wang, Zhigang(wangzhigang@uestc.edu.cn); Meng, Jiacheng(mengjiacheng@opt.ac.cn)
Source title:Digital Signal Processing: A Review Journal
Abbreviated source title:Digital Signal Process Rev J
Volume:136
Issue date:May 2023
Publication year:2023
Article number:103943
Language:English
ISSN:10512004
CODEN:DSPREJ
Document type:Journal article (JA)
Publisher:Elsevier Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Simultaneous wireless information and power transfer (SWIPT) technology is one of the solutions to the energy shortage problem in Massive multiple-input and multiple-output (MIMO) systems, while the low-resolution analog-to-digital convertor (ADC) is a potential way to significantly reduce the power consumption of radio frequency circuits in Massive MIMO enabled SWIPT systems. In this paper, we focus on the secrecy transmission maximization problem for Massive MIMO-SWIPT systems over Nakagami-m fading channels, where a low-resolution ADC quantization model and a non-linear energy harvester are exploited. By considering proportional fairness, a joint beamforming design and power allocation problem are proposed to achieve the sum logarithmic secrecy rates. To tackle the non-convex maximization problem, the suboptimal solutions of the beamforming design and power allocation are respectively obtained based on a successive convex approximation and a semidefinite relaxation. Numerical results demonstrate the effectiveness of the proposed joint optimization scheme.<br/></div> &copy; 2023
Number of references:28
Main heading:Energy transfer
Controlled terms:Analog to digital conversion - Beamforming - Digital radio - Fading (radio) - Fading channels
Uncontrolled terms:Analog-to-digital convertors - Information and power transfers - Low-resolution analog-to-digital convertor - Lower resolution - Massive multiple-input and multiple-output - Maximization problem - Multiple input and multiple outputs - Power transfer systems - Proportional fairness - Simultaneous wireless information and power transfer
Classification code:711.2  Electromagnetic Waves in Relation to Various Structures - 716.3  Radio Systems and Equipment
DOI:10.1016/j.dsp.2023.103943
Funding details:  Number: 2021M700707, Acronym: -, Sponsor: China Postdoctoral Science Foundation;Number: -, Acronym: UBC, Sponsor: University of British Columbia;Number: 2022NSFSC0905, Acronym: -, Sponsor: Natural Science Foundation of Sichuan Province;
Funding text:Hao Li received the Ph.D. degree with the School of Automation Engineering, University of Electronic Science and Technology of China, Chengdu, China, in 2020. He is currently a Postdoctoral with the Shenzhen Institute for Advanced Study, University of Electronic Science and Technology of China, Shenzhen, China, and also with the School of Automation Engineering, University of Electronic Science and Technology of China, Chengdu, China. He has been visiting the Wireless Communication Group, The University of British Columbia, Kelowna, BC, Canada, from 2017 to 2019, sponsored by the China Scholarship Council. His current research interests include 5G cellular networks, resource allocation optimization, Massive MIMO and heterogeneous networks.This document is the results of the research project funded by China Postdoctoral Science Foundation ( 2021M700707 ), and supported by Natural Science Foundation of Sichuan Province ( 2022NSFSC0905 ).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 116>
 
Accession number:20230613537948
Title:Research on assembly method of non-coaxial transmissive optical system
Authors:LeiYu (1, 2); Ma, Caiwen (1); Kang, Shifa (1); Yin, Yamei (1); Cao, Mingqiang (1) 
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, CAS, NO.17 Xinxi Road, Xi'an Hi-Tech Industrial Development Zone, Shaanxi, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, No.19(A) Yuquan Road, Shijingshan District, Beijing; 100049, China 
Corresponding author:LeiYu
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12507
Part number:1 of 1
Issue title:Advanced Optical Manufacturing Technologies and Applications 2022; and 2nd International Forum of Young Scientists on Advanced Optical Manufacturing, AOMTA and YSAOM 2022
Issue date:2023
Publication year:2023
Article number:125071C
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510661264
Document type:Conference article (CA)
Conference name:Advanced Optical Manufacturing Technologies and Applications 2022, AOMTA 2022 and 2nd International Forum of Young Scientists on Advanced Optical Manufacturing, YSAOM 2022
Conference date:July 29, 2022  -  July 31, 2022
Conference location:Changchun, China
Conference code:186036
Sponsor:Changchun Institute of Optics, Fine Mechanics and Physics, CAS; Changchun University of Science and Technology; Changchun University of Technology; et al.; Jilin University; University of Shanghai for Science and Technology
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">Coaxial transmission optical systems can be assembled by optical centering processing and optical centering assembly to eliminate the eccentricity and tilt of each lens, thus ensuring the coaxiality of the lens. Non-coaxial transmission optical systems cannot be assembled by the traditional optical centering method, and this type of system poses a new challenge to the assembly method. Aiming at a non-coaxial transmissive optical system, this paper proposes a precise assembly method based on the spatial coordinate change and the principle of self-collimation imaging. Firstly, we calculate the spatial angle and eccentricity value of different axis mirror groups, and then use two self-collimating theodolites and optical reticle centering tools to construct the spatial angle reference and eccentricity reference for different axis mirror groups. Then, the spatial position of each lens group is determined by the adjustment method of auto-collimation. The article finally carried out the alignment experiment. The wavefront RMS of the optical system after alignment is 0.026&lambda;@632.8nm which meets the design requirements and verifies the effectiveness of the proposed method.<br/></div> &copy; 2023 SPIE.
Number of references:10
Main heading:Alignment
Controlled terms:Lenses - Light transmission - Mirrors - Optical instruments - Optical systems
Uncontrolled terms:Auto-collimation - Coaxial transmission - Coaxiality - Eccentricity and tilt - Non-coaxial transmissive optical system - Optical centring - Precise assembly - Spatial angle - Transmission optical systems - Transmissive optical system
Classification code:601.1  Mechanical Devices - 741.1  Light/Optics - 741.3  Optical Devices and Systems - 941.3  Optical Instruments
Numerical data indexing:Size 6.328E-07m
DOI:10.1117/12.2655612
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 117>
 
Accession number:20231914055642
Title:Recent advances of lanthanide nanomaterials in Tumor NIR fluorescence detection and treatment    (Open Access)
Authors:Fan, Qi (1, 2); Sun, Chao (1, 2); Hu, Bingliang (1); Wang, Quan (1, 2) 
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology, Xi'an Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences, Xi'an; 710119, China; (2) Key Laboratory of Biomedical Spectroscopy of Xi'an, Key Laboratory of Spectral Imaging Technology, Xi'an Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences, Xi'an; 710119, China 
Corresponding authors:Wang, Quan(wangquan@opt.ac.cn); Fan, Qi(fanqi@opt.ac.cn)
Source title:Materials Today Bio
Abbreviated source title:Mater. Today Bio.
Volume:20
Issue date:June 2023
Publication year:2023
Article number:100646
Language:English
E-ISSN:25900064
Document type:Journal article (JA)
Publisher:Elsevier B.V.
Abstract:<div data-language="eng" data-ev-field="abstract">Lanthanide nanomaterials have garnered significant attention from researchers among the main near-infrared (NIR) fluorescent nanomaterials due to their excellent chemical and fluorescence stability, narrow emission band, adjustable luminescence color, and long lifetime. In recent years, with the preparation, functional modification, and fluorescence improvement of lanthanide materials, great progress has been made in their application in the biomedical field. This review focuses on the latest progress of lanthanide nanomaterials in tumor diagnosis and treatment, as well as the interaction mechanism between fluorescence and biological tissues. We introduce a set of efficient strategies for improving the fluorescence properties of lanthanide nanomaterials and discuss some representative in-depth research work in detail, showcasing their superiority in early detection of ultra-small tumors, phototherapy, and real-time guidance for surgical resection. However, lanthanide nanomaterials have only realized a portion of their potential in tumor applications so far. Therefore, we discuss promising methods for further improving the performance of lanthanide nanomaterials and their future development directions.<br/></div> &copy; 2023 The Authors
Number of references:208
Main heading:Fluorescence imaging
Controlled terms:Chemical stability - Diagnosis - Infrared devices - Medical imaging - Nanostructured materials - Rare earth elements - Rare earths - Tumors
Uncontrolled terms:Fluorescence detection - Fluorescence imaging - Infrared windows - Lanthanide nanomaterial - Near Infrared - Near infrared window - Near-infrared - Near-infrared fluorescence - Rare-earths - Therapy
Classification code:461.1  Biomedical Engineering - 461.2  Biological Materials and Tissue Engineering - 461.6  Medicine and Pharmacology - 547.2  Rare Earth Metals - 746  Imaging Techniques - 761  Nanotechnology - 801  Chemistry - 804.2  Inorganic Compounds - 933.1  Crystalline Solids
DOI:10.1016/j.mtbio.2023.100646
Funding details:  Number: 29J20-015-,29J20-052-, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 2022JQ544, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;
Funding text:The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: Natural Science Basic Research Plan in Shaanxi Province of China (No. 2022JQ544 ), "From 0 to 1&Prime; Original Innovation Project of the Basic Frontier Scientific Research Program of the Chinese Academy of Sciences ( 29J20-015-&#8546; ) and Chinese Academy of Sciences's 100 Talents Project: Research on Task oriented Functional Brain Development of Infants ( 29J20-052-&#8546; ).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold, Green
 
<RECORD 118>
 
Accession number:20230713598459
Title:Spatial coupling efficiency of collimators based on gradient-index lens with an angle polish
Authors:Song, Wei (1, 2, 3); Xie, Youjin (1, 2); Hao, Wei (1, 2); Han, Junfeng (1, 2); Yan, Peipei (1, 2); LI, Xin (1, 2); Wang, Yifan (1, 2); Li, Xiangyu (1, 2); Sun, Chuandong (1); Li, Zhiguo (1, 2) 
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) Key Laboratory of Space Precision Measurement Technology, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China 
Corresponding author:Li, Zhiguo(lzg@opt.ac.cn)
Source title:Optics and Laser Technology
Abbreviated source title:Opt Laser Technol
Volume:162
Issue date:July 2023
Publication year:2023
Article number:109245
Language:English
ISSN:00303992
CODEN:OLTCAS
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">As high coupling efficiency and return loss are crucial in fiber-optic transmission systems, they have attracted widespread attention. This study proposes a ray-transfer matrix-based mathematical analysis method and experimentally demonstrates a collimator based on a gradient-index lens with an angle polish. The propagation characteristics and coupling mechanisms of the collimators are introduced. A beam-steering technology based on a wedge prism and flat glass is proposed to improve the coupling efficiency of the Gaussian beam using collimators. The proposed method is validated via simulation and experiment. The results are significant in free-space optical communication, optical signal processing, and optical fiber connectors.<br/></div> &copy; 2023 Elsevier Ltd
Number of references:19
Main heading:Gaussian beams
Controlled terms:Efficiency - Lenses - Optical collimators - Optical fiber communication - Optical fibers - Signal processing - Transfer matrix method
Uncontrolled terms:Beam-steering - Beam-steering technology - Coupling efficiency - Efficiency loss - Fiber-optic transmissions - Gradient-index lens - In-fiber - Returns loss - Spatial couplings - Transmission systems
Classification code:711  Electromagnetic Waves - 716.1  Information Theory and Signal Processing - 717.1  Optical Communication Systems - 741.1.2  Fiber Optics - 741.3  Optical Devices and Systems - 913.1  Production Engineering - 921  Mathematics
DOI:10.1016/j.optlastec.2023.109245
Funding details:  Number: 2021YFC2202103, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;
Funding text:This work was supported by the National Key Research and Development Program of China ( 2021YFC2202103 ).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 119>
 
Accession number:20230713574401
Title:Stability research of fore-Telescope system with mechanical passive athermalization design
Authors:Sun, Jian (1, 2); Wang, Wei (1); Hu, Bing-Liang (1); Li, Si-Yuan (1); Zou, Chun-Bo (1); Feng, Yu-Tao (1) 
Author affiliation:(1) Xi an Institute of Optics Precision Mechanic of Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China 
Corresponding authors:Wang, Wei; Feng, Yu-Tao
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12558
Part number:1 of 1
Issue title:AOPC 2022: Optical Spectroscopy and Imaging
Issue date:2023
Publication year:2023
Article number:125580F
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510662308
Document type:Conference article (CA)
Conference name:2022 Applied Optics and Photonics China: Optical Spectroscopy and Imaging, AOPC 2022
Conference date:December 18, 2022  -  December 19, 2022
Conference location:Virtual, Online, China
Conference code:186190
Sponsor:Chinese Society for Optical Engineering (CSOE)
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">With the improvement of spatial resolution, the focal length of space cameras and spectral imagers become longer. The thermal stability of image stability is more sensitive, with the temperature, especially in VNIR (visible and near-infrared). To solve the thermal stability of R-C(Ritchey-Chr&eacute;tien) long focal length fore-Telescope system, the relevant factors are discussed, on the basis of the LASIS(Large Aperture Static Imaging Spectrometer), and the change in the spacing between primary mirror and secondary mirror with temperature is proposed. Base on the calculation in theory, the method of mechanical passive athermalization design is developed. Mechanical test results indicate that the first natural frequency is 195Hz, above the 100 Hz. The thermal experiments show that the stability of primary mirror and secondary mirror spacing is 0.5&mu;m-1, consisting with the FEA(Finite Element Analysis) value<br/></div> &copy; COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.
Number of references:15
Main heading:Mirrors
Controlled terms:Finite element method - Image enhancement - Infrared devices - Structural optimization - System stability - Telescopes - Thermodynamic stability
Uncontrolled terms:Mechanical - Mechanical passive athermalization design - Optimal structures - Passive athermalization - Primary mirrors - Ritchey-chretien - Secondary mirror - Spatial resolution - Telescope system - Visible and near infrared
Classification code:641.1  Thermodynamics - 741.3  Optical Devices and Systems - 921.5  Optimization Techniques - 921.6  Numerical Methods - 961  Systems Science
Numerical data indexing:Frequency 1.00E+02Hz, Frequency 1.95E+02Hz, Size 5.00E-07m
DOI:10.1117/12.2651530
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 120>
 
Accession number:20231513877180
Title:Modeling 3D sliding electrical contact considering fully coupled thermal-mechanical-electrical effects
Authors:Sui, Yijin (1); Wang, Wenzhong (1); Zhang, Haibo (1); Xie, Youjin (2, 3) 
Author affiliation:(1) School of Mechanical Engineering, Beijing Institute of Technology, Beijing; 100081, China; (2) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China 
Corresponding author:Zhang, Haibo(haibozhang@bit.edu.cn)
Source title:Tribology International
Abbreviated source title:Tribol Int
Volume:184
Issue date:June 2023
Publication year:2023
Article number:108491
Language:English
ISSN:0301679X
CODEN:TRBIBK
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">The 3D sliding electrical contact model considering thermal-mechanical-electrical coupling is presented in this paper. The semi-analytical method (SAM) is used to solve this complex multi-physical contact model. Firstly, the frequency response functions (FRFs) for thermal-mechanical-electrical fields are derived. Then, with discrete convolution and fast Fourier transform (DC-FFT) speeding calculation, a solving procedure, including the conjugate gradient method for force balance and algorithms for electrical potential equilibrium and heat flux partition, is proposed for the first time to solve the fully coupled electrical contact problem. Last, the effects of multiple loadings including the current, normal force, and sliding velocity on electrical contact behaviors are systematically investigated.<br/></div> &copy; 2023
Number of references:37
Main heading:Conjugate gradient method
Controlled terms:3D modeling - Electric contacts - Electric potential - Fast Fourier transforms - Frequency response - Heat flux
Uncontrolled terms:Constriction resistance - Contact modeling - Electric potential equilibrium - Electrical constriction resistance - Fully-coupled - Mechanical - Mechanical-Electrical coupling - Sliding electrical contacts - Thermal - Thermal-mechanical-electrical coupling
Classification code:641.2  Heat Transfer - 701.1  Electricity: Basic Concepts and Phenomena - 704.1  Electric Components - 723.2  Data Processing and Image Processing - 921  Mathematics - 921.3  Mathematical Transformations
DOI:10.1016/j.triboint.2023.108491
Funding details:  Number: U2141243, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: -, Sponsor: Beijing Institute of Technology Research Fund Program for Young Scholars;
Funding text:This work was supported by the National Natural Science Foundation of China ( U2141243 ) and Beijing Institute of Technology Research Fund Program for Young Scholars .
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 121>
 
Accession number:20230713574399
Title:Research on key technologies of hyperspectral imaging system for spaceborne water environment remote sensing monitoring
Authors:Song, Shuyao (1, 2); Liu, Xiao (1); Wang, Xueji (1); Liu, Yuyang (1, 2); Liu, Hong (1); Liu, Jiacheng (1); Yu, Tao (1) 
Author affiliation:(1) Xi an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shaanxi, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China 
Corresponding author:Yu, Tao(yutao@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12558
Part number:1 of 1
Issue title:AOPC 2022: Optical Spectroscopy and Imaging
Issue date:2023
Publication year:2023
Article number:125580D
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510662308
Document type:Conference article (CA)
Conference name:2022 Applied Optics and Photonics China: Optical Spectroscopy and Imaging, AOPC 2022
Conference date:December 18, 2022  -  December 19, 2022
Conference location:Virtual, Online, China
Conference code:186190
Sponsor:Chinese Society for Optical Engineering (CSOE)
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">In order to realize space-based remote sensing for river, lake and ocean environment monitoring and break through the key technology of hyperspectral imaging system, based on the Ritchey-Chr&eacute;tien (R-C) Cassegrain folding reflector telescope, we designed a front telescope system with a working altitude of 600 km, a working spectral band of 450-900 nm, a full field of view of 2.9&deg;, a system focal length of 400 mm, the optical speed of F/4 and effective control of aberration and chromatic aberration of adding three-piece correction mirror to control the field of view is designed. The initial structural parameters of the front telescope system are solved according to the primary aberration theory, and the secondary mirror blocking ratio of the front telescope system is designed to be 0.35, and the simulation and optimization design are carried out in ZEMAX software. The system performance analysis shows that more than 80% of the energy of the imaging spot is concentrated within 12 &mu;m.The maximum aberration is 0.78% and the maximum magnification chromatic aberration is 1.26 &mu;m.The RMS (Rate-Monotonic Scheduling) radius of spot at all fields of view and wavelengths in the point column diagram is less than 2.6 &mu;m (Airy radius is 3.3 &mu;m). At the Nyquist frequency of 25 lp / mm, the MTF (Modulation Transfer Function) values of each spectral section in all fields of view are greater than 0.8.All the above evaluation indexes meet the performance requirements of hyperspectral imaging system<br/></div> &copy; COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.
Number of references:11
Main heading:Aberrations
Controlled terms:Adaptive optics - Altitude control - Computer software - Hyperspectral imaging - Imaging systems - Mirrors - Optical remote sensing - Space optics - Telescopes
Uncontrolled terms:Cassegrain - Cassegrain. - Chromatic aberration - Field of views - Hyperspectral imaging systems - Key technologies - Remote sensing monitoring - Space-borne - Telescope system - Water environments
Classification code:656.1  Space Flight - 723  Computer Software, Data Handling and Applications - 731.3  Specific Variables Control - 741.1  Light/Optics - 741.3  Optical Devices and Systems - 746  Imaging Techniques
Numerical data indexing:Percentage 7.80E-01%, Percentage 8.00E+01%, Size 1.20E-05m, Size 1.26E-06m, Size 2.60E-06m, Size 3.30E-06m, Size 4.00E-01m, Size 4.50E-07m to 9.00E-07m, Size 6.00E+05m
DOI:10.1117/12.2651498
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 122>
 
Accession number:20232114113546
Title:Design of three-class ultra-efficient stray light suppression baffle
Authors:Jin, Yu (1, 2); Lin, Shangmin (1, 2); Wang, Hu (1, 2); Qiao, Jiang (1, 2); Yan, Haoyu (1, 2); Wang, Xingyan (1, 2) 
Author affiliation:(1) University of Chinese Academy of Sciences, Beijing City; 100049, China; (2) Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Science, No. 17, Information Avenue, High-tech Zone, Shanxi Province, Xi'an City; 710119, China 
Corresponding author:Lin, Shangmin(lsm175@163.com)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12585
Part number:1 of 1
Issue title:International Conference on Precision Instruments and Optical Engineering, PIOE 2022
Issue date:2023
Publication year:2023
Article number:1258504
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510662902
Document type:Conference article (CA)
Conference name:2022 International Conference on Precision Instruments and Optical Engineering, PIOE 2022
Conference date:September 23, 2022  -  September 25, 2022
Conference location:Guangzhou, China
Conference code:187960
Sponsor:Guangdong Measurement and Control Technology and Equipment Application Promotion Association
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">The ultra-efficient standard light baffle plays an important role in the calibration of the stray light test system. In this paper, a three-class baffle is designed. And a design scheme of the baffle with honeycombed wall is proposed, by analyzing the stray light transmission model and suppression mechanism, which can meet the requirements of a baffle with ultra-efficient stray light suppression capability. A simulation model of the baffle was established. The simulation of baffle show that when the stray light suppression angle is greater than 8&deg;, the PST value of the baffle reaches 10<sup>-6</sup> magnitude. When the stray light suppression angle is greater than 17&deg;, the PST value of the baffle reaches 10<sup>-12</sup> magnitude, which can meet the needs of ultra-efficient calibration of laboratory stray light test systems.<br/></div> &copy; 2023 SPIE.
Number of references:21
Main heading:Honeycomb structures
Controlled terms:Calibration - Light transmission - Optical instruments - Stray light
Uncontrolled terms:Design scheme - Model mechanisms - Simulation model - Stray light suppression - Suppression mechanism - Test systems - Three-class baffle - Transmission model - Transmission suppression - Ultra-efficient
Classification code:408.2  Structural Members and Shapes - 741.1  Light/Optics - 941.3  Optical Instruments
DOI:10.1117/12.2668091
Funding details:  Number: 2021YFC2203501, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;
Funding text:Fund project&#65306;National Key R&D Program of China (No. 2021YFC2203501)
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 123>
 
Accession number:20220711646734
Title:Improved structure for the dissipative soliton generation based on nonlinear polarization rotation effect
Authors:Ban, Xiaoqiang (1, 2); Li, Xiaohui (3); Zhong, Ming (4); Little, Brent E. (1, 2); Zhao, Wei (1, 2) 
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China; (3) School of Physics and Information Technology, Shaanxi Normal University, Xi'an, China; (4) School of Mathematics and Statistics, Shaanxi Normal University, Xi'an, China 
Corresponding author:Li, Xiaohui(lixiaohui0523@163.com)
Source title:Microwave and Optical Technology Letters
Abbreviated source title:Microwave Opt Technol Lett
Volume:65
Issue:5
Issue date:May 2023
Publication year:2023
Pages:1127-1132
Language:English
ISSN:08952477
E-ISSN:10982760
CODEN:MOTLEO
Document type:Journal article (JA)
Publisher:John Wiley and Sons Inc
Abstract:<div data-language="eng" data-ev-field="abstract">Nonlinear polarization rotation (NPR) technique has been studied for several decades to investigate the ultrafast pulse in both scientific and industrial fields. However, some drawbacks such as sensitive to the environment, noncompact, difficult to reach all the polarization states limit the real applications of this methods. In this work, an improved NPR technique, with polarizar-polarization controlar-polarizar structure, has been proposed for the first time. The new structure is relatively more simple to reach all the polarization states and remains much more stable states than traditional NPR technique. We proposed all-normal-dispersion Yb-doped fiber laser and rectangular-shaped spectrum is obtained both experimentally and theoretically by improved NPR technique. The achieved stable pulse duration and pulse period are 11.69 ps and 37.2 ns, respectively. Signal-to-noise ratio is 64 dB at 26.9&nbsp;MHz, thus the proposed fiber laser has very high stability. Besides, we investigate the output spectrum and pulse shape based on dispersive Fourier transformation, getting the right triangle and ordinary triangle spectrums that are symmetric with the corresponding pulse shapes.<br/></div> &copy; 2022 Wiley Periodicals LLC.
Number of references:31
Main heading:Fiber lasers
Controlled terms:Fourier transforms - Polarization - Signal to noise ratio - Solitons
Uncontrolled terms:All-normal dispersions - Dispersive fourier transformation - Dissipative solitons - Fourier transformations - Improved nonlinear polarization rotation technique - Nonlinear polarization rotation - Polarization state - Pulse-shape - Spectra's - Yb-doped fiber lasers
Classification code:716.1  Information Theory and Signal Processing - 744.4  Solid State Lasers - 921.3  Mathematical Transformations
Numerical data indexing:Decibel 6.40E+01dB, Frequency 2.69E+07Hz, Time 1.169E-11s, Time 3.72E-08s
DOI:10.1002/mop.33199
Funding details:  Number: 1110010717, Acronym: -, Sponsor: Shaanxi Normal University;
Funding text:The work is supported by Starting Grants of Shaanxi Normal University (Grant No. 1110010717).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 124>
 
Accession number:20222812337743
Title:Various-order soliton molecule evolution in a fiber laser with nonlinear polarization rotation effect
Authors:Ban, Xiaoqiang (1, 2); Li, Xiaohui (3); Zhong, Ming (4); Little, Brent E. (1, 2) 
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China; (3) School of Physics and Information Technology, Shaanxi Normal University, Xi'an, China; (4) School of Mathematics and Statistics, Shaanxi Normal University, Xi'an, China 
Corresponding author:Li, Xiaohui(lixiaohui0523@163.com)
Source title:Microwave and Optical Technology Letters
Abbreviated source title:Microwave Opt Technol Lett
Volume:65
Issue:5
Issue date:May 2023
Publication year:2023
Pages:1285-1291
Language:English
ISSN:08952477
E-ISSN:10982760
CODEN:MOTLEO
Document type:Journal article (JA)
Publisher:John Wiley and Sons Inc
Abstract:<div data-language="eng" data-ev-field="abstract">The generation and evolution of soliton molecules are investigated theoretically with the coupled nonlinear Schrodinger equations&nbsp;based on a vector field. The formation of second-and third-order soliton molecules is investigated. Besides this, various-order soliton molecules from the 6th order to the 13th order have been observed by adjusting small-signal gain and phase delay. Finally, we analyze the reason for the soliton molecule generation. Exploring soliton molecules is helpful for optical communication as well as for fiber laser design.<br/></div> &copy; 2022 Wiley Periodicals LLC.
Number of references:27
Main heading:Fiber lasers
Controlled terms:Molecules - Nonlinear equations - Optical fiber communication - Polarization - Solitons
Uncontrolled terms:A.Fibres - Coupled nonlinear Schrodinger equation - Equation based - Nonlinear polarization rotation - Nonlinear polarization rotation effect - Phase delay - Rotation effect - Small signal gain - Soliton molecules - Various-order soliton molecule
Classification code:717.1  Optical Communication Systems - 744.4  Solid State Lasers - 931.3  Atomic and Molecular Physics
DOI:10.1002/mop.33406
Funding details:  Number: XDB24030300, Acronym: CAS, Sponsor: Chinese Academy of Sciences;
Funding text:This work was supported by a strategic pilot project (Class B) of the Chinese Academy of Sciences (Grant No. XDB24030300).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 125>
 
Accession number:20232614306943
Title:Two-frame advanced iterative self-tuning algorithm for accurate phase retrieval
Authors:He, Zhouxuan (1); Du, Hubing (1); Gu, Feifei (4); Hu, Bingqing (1); Wang, Feng (2); Zhao, Zixin (3); Zhang, Gaopeng (2) 
Author affiliation:(1) School of Mechatronic Engineering, Xi'an Technological University, Shaanxi, Xi'an; 710032, China; (2) Xi'an Institute of Optics and Precision Mechanics, CAS, Xi'an; 710119, China; (3) State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Shaanxi, Xi'an; 710049, China; (4) Guangdong-Hong Kong-Macao Joint Laboratory of Human-Machine Intelligence Synergy Systems, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen; 518055, China 
Corresponding author:Du, Hubing(duhubing@xatu.edu.cn)
Source title:Optics and Lasers in Engineering
Abbreviated source title:Opt Lasers Eng
Volume:169
Issue date:October 2023
Publication year:2023
Article number:107715
Language:English
ISSN:01438166
CODEN:OLENDN
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">Two-shot random phase-shifting interferometry has been actively investigated and improved owing to more demanding requirements in investigating dynamic phenomena or sensing some transient events. Given the background intensity and phase step knowledge, a reconstruction algorithm can be used to recover a complex-valued signal from intensity-only measurements. Most algorithms assume the background intensity and modulation amplitude in a frame of interferogram are constant variables; however, in realistic systems, they vary laterally and axially across the field of view. The model can be used but often appears less precise. In this work, we propose an approach that leverages the iterative method to cope with spatially varying background intensity and modulation amplitude. Our approach, termed the two-frame advanced iterative self-tuning algorithm, uses the spatial mean algorithm paired with an iterative procedure to search the phase step from two captured fringe patterns. It represents a novel approach to reliable and practical two-step phase-shifting interferometry without pre-filtering due to the cancelation of simultaneously obtaining the phase shifts and measured phase through iterative operation in the spatial&ndash;temporal domain. Experimental results obtained using the proposed method indicate that it is a simple and robust solution for phase extraction from a two-frame unknown phase shift fringe pattern with spatially varying background intensity and modulation amplitude.<br/></div> &copy; 2023 Elsevier Ltd
Number of references:26
Main heading:Interferometry
Controlled terms:Iterative methods - Tuning
Uncontrolled terms:Dynamic phenomena - Fringe pattern - Fringes analysis - Modulation amplitudes - Phase retrieval - Phase shifting Interferometry - Phase steps - Random-phase - Self-tuning algorithms - Varying background
Classification code:921.6  Numerical Methods - 941.4  Optical Variables Measurements
DOI:10.1016/j.optlaseng.2023.107715
Funding details:  Number: 2022410, Acronym: YIPA, Sponsor: Youth Innovation Promotion Association;Number: 51905529, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 51975448, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:National Natural Science Foundation of China (51975448, 51905529); Key R & D Plan of Shaanxi Province (2021GY-274); Youth Innovation Promotion Association, CAS (2022410); Shaanxi Province Youth Science and Technology New Star Project (2023KJXX-102).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 126>
 
Accession number:20231714021605
Title:Generation of perfect vectorial vortex beams by employing coherent beam combining    (Open Access)
Authors:Ju, Pei (1, 2); Fan, Wenhui (1, 2, 3); Gao, Wei (1, 2); Li, Zhe (1, 2); Gao, Qi (1, 2); Li, Gang (1, 2); Jiang, Xiaoqiang (1, 2); Zhang, Tongyi (1, 2) 
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi&rsquo;an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi&rsquo;an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan; 030006, China 
Source title:Optics Express
Abbreviated source title:Opt. Express
Volume:31
Issue:7
Issue date:March 27, 2023
Publication year:2023
Pages:11885-11898
Language:English
E-ISSN:10944087
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">Based on coherent beam combining, we propose a method for generating the perfect vectorial vortex beams (VVBs) with a specially designed radial phase-locked Gaussian laser array, which is composed of two discrete vortex arrays with right-handed (RH) and left-handed (LH) circularly polarized states and in turn adjacent to each other. The simulation results demonstrate that the VVBs with correct polarization order and topological Pancharatnam charge are successfully generated. The diameter and thickness of generated VVBs independent of the polarization orders and topological Pancharatnam charges further prove that the generated VVBs are perfect. Propagating in free space, the generated perfect VVBs can be stable for a certain distance, even with half-integer orbital angular momentum. In addition, constant phases &phi;0 between the RH and LH circularly polarized laser arrays has no effect on polarization order and topological Pancharatnam charge but makes polarization orientation to rotate &phi;<inf>0</inf>/2. Moreover, perfect VVBs with elliptically polarized states can be flexibly generated only by adjusting the intensity ratio between the RH and LH circularly polarized laser array, and such perfect VVBs are also stable on beam propagation. The proposed method could provide a valuable guidance for high power perfect VVBs in future applications.<br/></div> &copy; 2023 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.
Number of references:48
Main heading:Topology
Controlled terms:Circular polarization - Gaussian beams - Vortex flow
Uncontrolled terms:Circularly polarized lasers - Coherent beam combining - Gaussian lasers - Laser arrays - Lefthanded - Phase locked - Polarized state - Radial phase - Right handed - Vortex beams
Classification code:631.1  Fluid Flow, General - 701.1  Electricity: Basic Concepts and Phenomena - 711  Electromagnetic Waves - 921.4  Combinatorial Mathematics, Includes Graph Theory, Set Theory
DOI:10.1364/OE.485396
Funding details:  Number: 62005310,62171443, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: XIOPMQCH2021003, Acronym: YIPA CAS, Sponsor: Youth Innovation Promotion Association of the Chinese Academy of Sciences;Number: 2021GY-298, Acronym: -, Sponsor: Key Research and Development Projects of Shaanxi Province;
Funding text:Funding. Youth Innovation Promotion Association XIOPM-CAS (XIOPMQCH2021003); National Natural Science Foundation of China (62005310, 62171443); Key Research and Development Projects of Shaanxi Province (2021GY-298).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
 
<RECORD 127>
 
Accession number:20232214155305
Title:Polarization control of terahertz waves generated by a femtosecond three-color pulse scheme
Authors:Wang, Hanqi (1, 2); Fan, Wenhui (1, 2, 3); Chen, Xu (1); Yan, Hui (1, 2) 
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi&rsquo;an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi&rsquo;an; 710119, China; (2) University of Chinese, Academy of Sciences, Beijing; 100049, China; (3) Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan; 030006, China 
Corresponding author:Fan, Wenhui(fanwh@opt.ac.cn)
Source title:Journal of the Optical Society of America B: Optical Physics
Abbreviated source title:J Opt Soc Am B
Volume:40
Issue:6
Issue date:June 2023
Publication year:2023
Pages:1375-1383
Language:English
ISSN:07403224
E-ISSN:15208540
CODEN:JOBPDE
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">Polarization characteristics of terahertz waves generated from a short air plasma excited by femtosecond three-color pulses with a frequency ratio of 1:2:3 have been theoretically investigated, and the results show that flexible and effective control of terahertz polarization can be achieved by means of changing the polarization combination and relative phase of three-color pulses, which is related to the electric field spatiotemporal distribution of the synthetic pulse formed via three-color pulse superposition. The complicated spatiotemporal distribution can be made clear by analyzing the projection component of the electric field in the three-dimensional Cartesian coordinate system. For terahertz waves generated from a short air plasma filament, the proposed method of terahertz polarization control on the basis of a three-color pulse scheme can be realized by ordinary multi-cycle laser pulses and overcome the disadvantage of few-cycle laser pulses utilized to obtain nearly circularly polarized intense terahertz waves or elliptically polarized intense terahertz waves with large ellipticity in the two-color pulse scheme.<br/></div> &copy; 2023 Optica Publishing Group.
Number of references:43
Main heading:Terahertz waves
Controlled terms:Color - Electric fields - Laser pulses - Polarization - Spatial distribution
Uncontrolled terms:Air plasmas - Cartesian coordinate system - Cartesian-coordinates system - Femtoseconds - Frequency ratios - Polarization characteristics - Polarization control - Relative phasis - Spatiotemporal distributions - Tera Hertz
Classification code:405.3  Surveying - 701.1  Electricity: Basic Concepts and Phenomena - 711  Electromagnetic Waves - 741.1  Light/Optics - 744.1  Lasers, General - 902.1  Engineering Graphics - 921  Mathematics
DOI:10.1364/JOSAB.484521
Funding details:  Number: LSIT201913N, Acronym: -, Sponsor: -;Number: 61675230,61905276, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2020JQ-437, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;
Funding text:Funding. National Natural Science Foundation of China (61675230, 61905276); Natural Science Foundation of Shaanxi Province (2020JQ-437); Open Research Fund of Key Laboratory of Spectral Imaging Technology, Chinese Academy of Sciences (LSIT201913N).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 128>
 
Accession number:20232114130171
Title:Remote Sensing Image Retrieval by Deep Attention Hashing with Distance-Adaptive Ranking    (Open Access)
Authors:Zhang, Yichao (1, 2); Zheng, Xiangtao (3); Lu, Xiaoqiang (3) 
Author affiliation:(1) Chinese Academy of Sciences, Key Laboratory of Spectral Imaging Technology, Xi'An Institute of Optics and Precision Mechanics, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Fuzhou University, College of Physics and Information Engineering, Fuzhou; 350002, China 
Corresponding author:Zheng, Xiangtao(xiangtaoz@gmail.com)
Source title:IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Abbreviated source title:IEEE J. Sel. Top. Appl. Earth Obs. Remote Sens.
Volume:16
Issue date:2023
Publication year:2023
Pages:4301-4311
Language:English
ISSN:19391404
E-ISSN:21511535
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">With the joint advancement of numerous related fields of remote sensing, the amount of remote sensing data is growing exponentially. As an essential remote sensing Big Data management technique, content-based remote sensing image retrieval has attracted more and more attention. A novel deep attention hashing with distance-adaptive ranking (DAH) is proposed for remote sensing image retrieval in this article. First, a channel-spatial joint attention mechanism is employed for feature extraction of remote sensing images to make the proposed DAH method focus more on the critical details of the remote sensing images and suppress irrelevant regional responses. Second, a novel balanced pairwise weighted loss function is proposed to enable discrete hash codes to participate in neural network training, which contains pairwise weighted similarity loss, classification loss, and quantization loss. The pairwise weighted similarity loss is designed to decrease the impact of the imbalance of positive and negative sample pairs. The classification loss and quantization loss are added to the loss function to decrease background interference and information loss during the quantization phase, respectively. Finally, a distance-adaptive ranking strategy with category-weighted Hamming distance is presented in the retrieval phase to utilize the category probability information fully. Experiments on benchmark datasets compared with state-of-the-art methods demonstrate the effectiveness of the proposed DAH method.<br/></div> &copy; 2008-2012 IEEE.
Number of references:50
Main heading:Feature extraction
Controlled terms:Big data - Classification (of information) - Deep learning - Extraction - Hamming distance - Hash functions - Image retrieval - Information management - Neural networks - Remote sensing  - Semantics
Uncontrolled terms:Adaptive rankings - Channel-spatial joint attention - Code - Deep hashing - Deep learning - Distance-adaptive ranking - Features extraction - Joint attention - Remote sensing image retrieval - Remote-sensing  - Spatial joint
Classification code:461.4  Ergonomics and Human Factors Engineering - 716.1  Information Theory and Signal Processing - 723.2  Data Processing and Image Processing - 802.3  Chemical Operations - 903.1  Information Sources and Analysis
DOI:10.1109/JSTARS.2023.3271303
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
 
<RECORD 129>
 
Accession number:20232114125062
Title:Classification of skin cancer based on hyperspectral microscopic imaging and machine learning    (Open Access)
Authors:Qi, Meijie (1, 2); Liu, Yujie (1); Li, Yanru (1); Liu, Lixin (1); Zhang, Zhoufeng (2) 
Author affiliation:(1) School of Optoelectronic Engineering, Xidian University, Xi&rsquo;an; 710071, China; (2) CAS Key Laboratory of Spectral Imaging Technology, Xi&rsquo;an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China 
Corresponding author:Liu, Lixin(lxliu@xidian.edu.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12601
Part number:1 of 1
Issue title:SPIE-CLP Conference on Advanced Photonics 2022
Issue date:2023
Publication year:2023
Article number:1260103
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510663282
Document type:Conference article (CA)
Conference name:SPIE-CLP Conference on Advanced Photonics 2022
Conference date:November 21, 2022  -  November 23, 2022
Conference location:Virtual, Online, China
Conference code:188033
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">Hyperspectral microscopic imaging (HMI) technology is a non-contact optical diagnostic method, which combines hyperspectral imaging (HSI) technology with microscopy to provide both spectral information and image information of the samples to be measured. In this paper, basal cell carcinoma (BCC), squamous cell carcinoma (SCC) and malignant melanoma (MM) were classified based on synthetic RGB image data from HMI cube by using four classification methods extreme learning machine (ELM), support vector machine (SVM), decision tree and random forest (RF). The highest classification accuracy of 0.791&plusmn;0.060 and a KAPPA value of 0.685&plusmn;0.095 were obtained when color moment, gray level co-occurrence matrix (GLCM) and local binary pattern (LBP) were used for image feature extraction, feature dimensions were reduced by the PLS, the sample sets were divided by the hold-out method, and the tissues were classified by the SVM model.<br/></div> &copy; 2023 SPIE.
Number of references:11
Main heading:Decision trees
Controlled terms:Classification (of information) - Dermatology - Diseases - Hyperspectral imaging - Learning systems - Local binary pattern - Support vector machines
Uncontrolled terms:Cancer classification - Classifieds - HyperSpectral - Hyperspectral microscopic imaging - Imaging technology - Machine-learning - Microscopic imaging - Non-contact - Optical diagnostic methods - Skin cancers
Classification code:461.6  Medicine and Pharmacology - 716.1  Information Theory and Signal Processing - 723  Computer Software, Data Handling and Applications - 723.2  Data Processing and Image Processing - 746  Imaging Techniques - 903.1  Information Sources and Analysis - 921.4  Combinatorial Mathematics, Includes Graph Theory, Set Theory - 961  Systems Science
DOI:10.1117/12.2666425
Funding details:  Number: LSIT202005W, Acronym: -, Sponsor: -;
Funding text:This work was supported by the Technology (LSIT202005W).This work was supported by the 111 Project and Open Research Fund of CAS Key Laboratory of Spectral Imaging Technology (LSIT202005W).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Bronze
 
<RECORD 130>
 
Accession number:20231113742172
Title:Design and simulation of space-based photoelectric imaging stabilization control system    (Open Access)
Authors:Cheng, Zhiyuan (1, 2); Ji, Zhou (3); Su, Hua (4); Gao, Yansheng (3) 
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences, China; (2) Cas Key Laboratory of Space Precision Measurement Technology, Xi'an; 710119, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China; (4) School of Physics and Information Technology, Shaanxi Normal University, Xi'an; 710119, China 
Corresponding author:Cheng, Zhiyuan(czy@opt.ac.cn)
Source title:ACM International Conference Proceeding Series
Abbreviated source title:ACM Int. Conf. Proc. Ser.
Part number:1 of 1
Issue title:Proceedings - 2023 7th International Conference on Control Engineering and Artificial Intelligence, CCEAI 2023
Issue date:January 28, 2023
Publication year:2023
Pages:96-101
Language:English
ISBN-13:9781450397513
Document type:Conference article (CA)
Conference name:7th International Conference on Control Engineering and Artificial Intelligence, CCEAI 2023
Conference date:January 28, 2023  -  January 30, 2023
Conference location:Sanya, China
Conference code:187085
Publisher:Association for Computing Machinery
Abstract:<div data-language="eng" data-ev-field="abstract">Space-based theodolite is an important technology in the field of space remote sensing imaging. The technology can be applied to space optical remote sensing, space astronomical observation, space laser communication and other technical fields. In order to suppress the influence of disturbance of moving satellite platform on the imaging stabilization accuracy and improve the stabilization accuracy of space-based theodolite, a photoelectric imaging stabilization method based on fiber optic gyroscope and Fast Steering Mirror(FSM) was proposed to compensate the disturbance of moving satellite platform. Firstly, fiber optic gyroscope was used to measure the micro-perturbation information of the moving satellite platform. Then the influence of the disturbance on the optical axis direction of the space-based theodolite was compensated by FSM. Finally, the method improved the stability accuracy of the space-based theodolite. A semi-physical simulation experiment platform for space-based photoelectric image stabilization was constructed, and the proposed image stabilization method of space-based theodolite and the space-based stabilization experiment platform was tested and verified. The research results show that the proposed space-based stabilization method can effectively improve the stabilization accuracy of the space-based photoelectric system. The novel stabilization method and space-based stabilization platform can provide effective technical support for the design and development of space high-precision photoelectric stabilization system.<br/></div> &copy; 2023 Owner/Author.
Number of references:13
Main heading:Fiber optics
Controlled terms:Gyroscopes - Optical communication - Optical remote sensing - Photoelectricity - Satellites - Simulation platform - Stabilization
Uncontrolled terms:Disturbance of moving satellite platform - Experiment platforms - Fast-steering mirrors - Fibre optics gyroscopes - Imaging stabilization - Photoelectrics - Satellite platforms - Space-based - Space-based the odolite - Stabilization methods
Classification code:655.2  Satellites - 701.1  Electricity: Basic Concepts and Phenomena - 717.1  Optical Communication Systems - 723.5  Computer Applications - 741.1  Light/Optics - 741.1.2  Fiber Optics - 741.3  Optical Devices and Systems
DOI:10.1145/3580219.3580237
Funding details:  Number: CXJJ-21S042, Acronym: -, Sponsor: -;Number: 61875257, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:&lowast;This research was supported by the National Natural Science Foundation of China (Grant No 61875257) This work is licensed under a Creative Commons Attribution-NonCommercial International 4.0 License.This research was supported by the National Natural Science Foundation of China and Grant No 61875257. The work was also supported by the Open Research Fund of CAS Key Laboratory of Space Precision Measurement Technology and Grant No CXJJ-21S042.
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Bronze
 
<RECORD 131>
 
Accession number:20230613543063
Title:Precision Improvement of Underwater Single Photon Imaging Based on Model Matching
Authors:Zhang, Zhenyang (1, 2); Chen, Songmao (2, 3); Wang, Jie (1, 2); Ma, Caiwen (2, 4); Su, Xiuqin (1, 2) 
Author affiliation:(1) University of Chinese Academy of Sciences, Beijing; 100049, China; (2) Pilot National Laboratory for Marine Science and Technology, Qingdao; 266200, China; (3) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Key Laboratory of Space Precision Measurement Technology, Xi'an; 710119, China; (4) Chinese Academy of Sciences, Xi'an Institute of Optics and Precision Mechanics, Xi'an; 710119, China 
Corresponding author:Ma, Caiwen(cwma@opt.ac.cn)
Source title:IEEE Photonics Technology Letters
Abbreviated source title:IEEE Photonics Technol Lett
Volume:35
Issue:5
Issue date:March 1, 2023
Publication year:2023
Pages:253-256
Language:English
ISSN:10411135
E-ISSN:19410174
CODEN:IPTLEL
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">In this letter, the Gaussian With Exponential Components (GWEC) model is proposed to simulate the Instrument Response Function (IRF) by the convolution of the conventional Gaussian and exponential models, which aims to solve the issue that the system failed to obtain IRF accurately, resulting in poor accuracy of the cross-correlation results. Meanwhile, the GWEC model takes the advantage of simplicity in parameter setting and high range accuracy after cross-correlation operation.<br/></div> &copy; 1989-2012 IEEE.
Number of references:18
Main heading:Probability density function
Controlled terms:Particle beams - Photonics - Photons - Underwater imaging
Uncontrolled terms:Component modeling - Cross-correlations - Exponential components - Fitting - Gaussian with exponential component - Gaussians - Instrument response functions - Precision improvement - Single-photon imaging - Underwater
Classification code:741.1  Light/Optics - 741.3  Optical Devices and Systems - 746  Imaging Techniques - 922.1  Probability Theory - 931.3  Atomic and Molecular Physics - 932.1  High Energy Physics
DOI:10.1109/LPT.2023.3238079
Funding details:  Number: 2020M683600, Acronym: -, Sponsor: China Postdoctoral Science Foundation;
Funding text:This work was supported by the China Postdoctoral Science Foundation under Grant 2020M683600.
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 132>
 
Accession number:20224513072238
Title:Visual attention-based siamese CNN with SoftmaxFocal loss for laser-induced damage change detection of optical elements
Authors:Kou, Jingwei (1, 2); Zhan, Tao (3); Zhou, Deyun (1); Xie, Yu (4); Da, Zhengshang (2); Gong, Maoguo (5) 
Author affiliation:(1) School of Electronics and Information, Northwestern Polytechnical University, Xi'an; 710072, China; (2) The Advanced Optical Instrument Research Department, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (3) College of Information Engineering, Northwest A& F University, Xi'an; 712100, China; (4) School of Computer and Information Technology, Shanxi University, Taiyuan; 030006, China; (5) Key Laboratory of Intelligent Perception and Image Understanding of Ministry of Education, Xidian University, Xi'an; 710071, China 
Corresponding author:Zhou, Deyun(dyzhounpu@nwpu.edu.cn)
Source title:Neurocomputing
Abbreviated source title:Neurocomputing
Volume:517
Issue date:January 14, 2023
Publication year:2023
Pages:173-187
Language:English
ISSN:09252312
E-ISSN:18728286
CODEN:NRCGEO
Document type:Journal article (JA)
Publisher:Elsevier B.V.
Abstract:<div data-language="eng" data-ev-field="abstract">With high-energy laser irradiating, the laser-induced damages may occur in the surfaces of optical elements in laser facilities. As the laser-induced damage changes can badly affect regular and healthy operation of laser facilities, it is essential to effectively detect real damage changes while suppressing meaningless and spurious changes in captured optical images. In order to achieve high-precision laser-induced damage change detection, this paper presents a novel deep learning model which exploits visual attention-based siamese convolutional neural network with SoftmaxFocal loss and significantly improves the performance of damage change detection. In the proposed model, an end-to-end classification network is designed and trained which fuses the spatial-channel domain collaborative attention modules into siamese convolutional neural network thus achieving more efficient feature extraction and representation. For the purpose of addressing the unbalanced distribution of hard and easy samples, a novel loss function which is termed as SoftmaxFocal loss is put forward to train the proposed network. The SoftmaxFocal loss creatively introduces an additive focusing term into original softmax loss which greatly enhances the online hard sample mining ability of the proposed model. Experiments conducted on three real datasets demonstrate the validity and superiority of the proposed model.<br/></div> &copy; 2022 Elsevier B.V.
Number of references:47
Main heading:Convolution
Controlled terms:Behavioral research - Change detection - Convolutional neural networks - Damage detection - Deep learning - Geometrical optics - Laser damage
Uncontrolled terms:Change detection - Convolutional neural network - High-energy lasers - Laser facilities - Laser irradiating - Laser-induced damage - Siamese convolutional neural network - Softmaxfocal loss - Visual Attention - Visual attention mechanisms
Classification code:461.4  Ergonomics and Human Factors Engineering - 716.1  Information Theory and Signal Processing - 741.1  Light/Optics - 744.8  Laser Beam Interactions - 971  Social Sciences
DOI:10.1016/j.neucom.2022.10.074
Funding details:  Number: 62103311, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: MOE, Sponsor: Ministry of Education of the People's Republic of China;
Funding text:This work was supported by the National Natural Science Foundation of China under Grant 62103311.Maoguo Gong received the B.S. degree (Hons.) in electronic engineering and the Ph.D. degree in electronic science and technology from Xidian University, Xi&rsquo;an, China, in 2003 and 2009, respectively. Since 2006, he has been a Teacher with Xidian University. In 2008 and 2010, he was promoted as an Associate Professor and a Full Professor, respectively, both with exceptive admission. His current research interest includes computational intelligence with applications to optimization, learning, data mining, and image understanding. Dr. Gong was a recipient of the prestigious National Program for the support of Top-Notch Young Professionals from the Central Organization Department of China, the Excellent Young Scientist Foundation from the National Natural Science Foundation of China, and the New Century Excellent Talent in University from the Ministry of Education of China. He is an Associate Editor of the IEEE TRANSACTIONS ON EVOLUTIONARY COMPUTATION and the IEEE TRANSACTIONS ON NEURAL NETWORKS AND LEARNING SYSTEMS.
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 133>
 
Accession number:20225113272435
Title:Modeling and analysis of fast steering mirror disturbance effects on the line of sight jitter for precision pointing and tracking system
Authors:Lv, Tao (1, 2, 3, 4); Ruan, Ping (2, 3); Jiang, Kai (2, 3); Jing, Feng (2, 3) 
Author affiliation:(1) University of Chinese Academy of Sciences, Beijing; 100049, China; (2) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (3) Key Laboratory of Space Precision Measurement Technology, Chinese Academy of Sciences, Xi'an; 710119, China; (4) Youth Innovation Promotion Association, Chinese Academy of Sciences, Beijing; 100029, China 
Corresponding author:Ruan, Ping(ruanp@opt.ac.cn)
Source title:Mechanical Systems and Signal Processing
Abbreviated source title:Mech Syst Signal Process
Volume:188
Issue date:April 1, 2023
Publication year:2023
Article number:110002
Language:English
ISSN:08883270
E-ISSN:10961216
CODEN:MSSPEP
Document type:Journal article (JA)
Publisher:Academic Press
Abstract:<div data-language="eng" data-ev-field="abstract">Fast steering mirrors (FSMs) are typically applied for beam stabilization for precision pointing and tracking systems (PPTSs) owing to their high-bandwidth, high-resolution, and high accuracy. In addition to the advantages, the presence of the residual momentum which caused by FSMs&rsquo; operation usually has noticeable effects on the stabilization of the line of sight (LOS) for PPTSs. Hence, it is necessary and momentous to estimate the effects of these disturbances to give insight into the FSM specification and the PPTS structural performance. However, the characteristic of multidisciplinary coupling makes it a challenge to measure the LOS jitter caused by FSMs. We approach this problem by establishing an integrated model for estimating the LOS jitter. A dynamic model of an FSM is firstly built to value the unbalanced momentum generated from its motion. Then a finite element model for the structure of the tracking system is established to predict the dynamic response excited by the disturbances from the FSM. In addition, with a linear optical model, the system optical performance under the FSM's disturbances is determined. Finally, a test is conducted to verify the validity of the model and the analysis. This paper focuses on estimating the disturbances effects of the FSM on the LOS jitter for a PPTS, and providing potential approaches for reducing these effects.<br/></div> &copy; 2022 Elsevier Ltd
Number of references:42
Main heading:Jitter
Controlled terms:Mirrors - Stabilization - Tracking (position)
Uncontrolled terms:Beam stabilizations - Disturbance effects - Fast-steering mirrors - Integrated modeling - Line of Sight - Line of sight jitter - Lines-of-sight - Pointing and tracking system - Precision pointing - Precision tracking
Classification code:741.3  Optical Devices and Systems
DOI:10.1016/j.ymssp.2022.110002
Funding details:  Number: -, Acronym: YIPA CAS, Sponsor: Youth Innovation Promotion Association of the Chinese Academy of Sciences;
Funding text:This work is supported by the Key Laboratory of Space Precision Measurement Technology, Chinese Academy of Sciences (NO. 29J21-063-III), and the Youth Innovation Promotion Association, Chinese Academy of Sciences. The authors thank Yongming Qiao, Wen Liu and Rui Wang for their significant work during the experiment.
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 134>
 
Accession number:20230613537564
Title:Optimization of the quality control parameters in sapphire single crystal preparation using the Kyropoulos method
Authors:Xu, Jia (1); Qiao, Tiezhu (1, 2); Dong, Huijie (2); Zhang, Haifeng (3); Yan, Gaowei (4) 
Author affiliation:(1) Key Laboratory of Advanced Transducers and Intelligent Control System, Ministry of Education, Taiyuan University of Technology, Taiyuan; 030024, China; (2) College of Optoelectronics, Taiyuan University of Technology, Taiyuan; 030024, China; (3) Xi'an Institute of Optics and Precision Mechanics of CAS, Shanxi, Xi'an; 710119, China; (4) College of Electrical and Power Engineering, Taiyuan University of Technology, Taiyuan; 030024, China 
Corresponding author:Qiao, Tiezhu(qiaotiezhu@tyut.edu.cn)
Source title:CrystEngComm
Abbreviated source title:Crystengcomm
Volume:25
Issue:7
Issue date:January 25, 2023
Publication year:2023
Pages:1136-1145
Language:English
E-ISSN:14668033
CODEN:CRECF4
Document type:Journal article (JA)
Publisher:Royal Society of Chemistry
Abstract:<div data-language="eng" data-ev-field="abstract">The production of sapphire single crystals with high quality and low cost is an important goal of the sapphire industry. The quality of seeding has a direct impact on the final growth quality of sapphire crystals when sapphire is prepared using the Kyropoulos method. Keeping the crystal/melt contact stable is essential for lowering the number of seeding defects. In order to reduce the preparation cost of sapphire, an optimization strategy integrating computational fluid dynamics, artificial neural networks, and genetic algorithm is proposed to optimize the growth parameters of crystal seeding. The optimization goals are to stabilize the crystal/melt growth interface and increase seeding effectiveness. Three growth parameters, namely, melt temperature, seed crystal rotation speed and pulling speed, are selected as optimization variables. The samples produced by numerical calculation are combined with the actual production data to train and test the neural networks. The genetic algorithm is coupled with artificial neural networks to solve the multi-objective conflict between improving seeding efficiency and reducing the formation of crystal defects in the seeding process. The influence of the mechanism of different combinations of seeding parameters on seeding quality is discussed, and the optimization of seeding growth process is realized. The results show that the optimized combination of parameters gained in this study can improve the seeding speed and ensure the stability of the solid-liquid interface. This work is helpful to reduce the formation of seeding defects, improve the seeding quality, and shorten the seeding time.<br/></div> &copy; 2023 The Royal Society of Chemistry
Number of references:23
Main heading:Sapphire
Controlled terms:Computational fluid dynamics - Costs - Crystal orientation - Genetic algorithms - Molecular dynamics - Phase interfaces
Uncontrolled terms:Control parameters - Crystal melt - Crystal preparation - Growth parameters - High quality - High-low - Kyropoulos methods - Optimisations - Sapphire single crystal - Seeding qualities
Classification code:482.2.1  Gems - 723.5  Computer Applications - 801.4  Physical Chemistry - 911  Cost and Value Engineering; Industrial Economics - 931.1  Mechanics - 933.1.1  Crystal Lattice
DOI:10.1039/d2ce01675c
Funding details:  Number: 61973226, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2021ZD0004, Acronym: -, Sponsor: Science and Technology Major Project of Inner Mongolia;
Funding text:This research was supported by the National Natural Science Foundation of China (Grant No. 61973226) and the Inner Mongolia Science and Technology Major Project (Grant No. 2021ZD0004).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 135>
 
Accession number:20231914078637
Title:Harvey-Shack theory for a converging-diverging Gaussian beam    (Open Access)
Authors:Ma, Zhanpeng (1, 2, 3, 4); Hansen, Poul-Erik (3); Wang, Hu (1, 2); Karamehmedovi&#263;, Mirza (4); Chen, Qinfang (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) Danish Fundamental Metrology A/S, H&oslash;rsholm; DK-2970, Denmark; (4) Department of Applied Mathematics and Computer Science, Technical University of Denmark, Kgs. Lyngby; DK-2800, Denmark 
Corresponding author:Hansen, Poul-Erik(peh@dfm.dk)
Source title:Journal of the Optical Society of America B: Optical Physics
Abbreviated source title:J Opt Soc Am B
Volume:40
Issue:5
Issue date:May 2023
Publication year:2023
Pages:1162-1169
Language:English
ISSN:07403224
E-ISSN:15208540
CODEN:JOBPDE
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">The scattering characteristics of random rough surfaces illuminated with a 3D converging-diverging Gaussian beam are investigated by applying the conventional Harvey-Shack theory in conjunction with 2D plane-wave decomposition. The Gaussian beam is assumed to have an arbitrary angle of incidence and to be linearly s-polarized. Using data obtained from laser BRDF measurements on isotropic random rough surfaces with low surface roughness, we demonstrate that the Gaussian beam Harvey-Shack theory is in better accordance with the experimental data than the conventional Harvey-Shack theory. The two models become identical for a large beam waist radii but are significantly different for smaller ones.<br/></div> &copy; 2023 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.
Number of references:34
Main heading:Gaussian beams
Controlled terms:Gaussian distribution - Laser theory - Surface measurement - Surface roughness
Uncontrolled terms:Angle of Incidence - Arbitrary angles - Beam waist radius - Isotropics - Low surface roughness - Plane-wave decomposition - Random rough surfaces - S-polarized - Scattering char-acteristics
Classification code:711  Electromagnetic Waves - 744.1  Lasers, General - 922.1  Probability Theory - 922.2  Mathematical Statistics - 931.2  Physical Properties of Gases, Liquids and Solids - 943.2  Mechanical Variables Measurements
DOI:10.1364/JOSAB.478801
Funding details:  Number: JRP 18SIB03, Acronym: -, Sponsor: -;Number: 25893, Acronym: -, Sponsor: Villum Fonden;Number: -, Acronym: -, Sponsor: Danish Agency for Science and Higher Education;Number: 202104910354, Acronym: CSC, Sponsor: China Scholarship Council;Number: 2021YFC2202100,2021YFC2202104, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;
Funding text:Acknowledgment. Author Z. Ma thanks Dr. T. Jiang for useful discussions. P-E. Hansen was also supported by the Danish Agency for Institutions and Education. Z. Ma was supported by China Scholarship Council and National Key Research and Development Program of China. M. Karamehmedovi&#263; was supported by The Villum Foundation.Funding. European Metrology Programme for Innovation and Research (20IND07, BxDiff, JRP 18SIB03, TracOptic); Danish Agency for Science and Higher Education; China Scholarship Council (CSC) (202104910354); National Key Research and Development Program of China (2021YFC2202100, 2021YFC2202104); Villum Fonden (25893).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Green
 
<RECORD 136>
 
Accession number:20232114124188
Title:Numerical simulation of dual MCP hard x-ray imaging detector on spatial resolution and detection quantum efficiency
Authors:Liu, Yiheng (1, 2, 3); Li, Lili (1, 2, 3); Chen, Ping (1, 3); Zhang, Feng (4); Gou, Yongsheng (1); He, Kai (1); Tian, Jinshou (1, 3) 
Author affiliation:(1) Key Laboratory of Ultra-fast photoelectric Diagnostics Technology, 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) Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan; 030006, China; (4) China Academy of Engineering Physics, Mianyang; 621900, China 
Corresponding authors:Chen, Ping(chenping1@opt.ac.cn); Tian, Jinshou(tianjs@opt.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12595
Part number:1 of 1
Issue title:Advanced Fiber Laser Conference, AFL 2022
Issue date:2023
Publication year:2023
Article number:125950D
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510663145
Document type:Conference article (CA)
Conference name:2022 Advanced Fiber Laser Conference, AFL 2022
Conference date:November 11, 2022  -  November 13, 2022
Conference location:Changsha, China
Conference code:187972
Sponsor:The Chinese Society for Optical Engineering
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">Compton radiography is an important diagnostic tool for inertial confinement fusion (ICF), which provides important parameters about integrity, symmetry and &rho;R areal density of the dense cold fuel surrounding the hot spot. The dual MCPs (micro-channel plate) configuration detector as a key component for Compton radiography has the ability to detect hard x-rays at energies from 40 to 200 keV with higher detective quantum efficiency (DQE). In this work, a set of simulation methods for calculating the DQE and spatial resolution of dual MCPs are proposed. The photoelectric conversion and secondary electron multiplication processes of 59 KeV X-rays in double MCPs were simulated. The first piece of MCP with 51% lead content absorb x-rays volumetrically to improve the DQE and the second piece of MCP provides a large gain to multiply the secondary electrons. The simulation results indicate that the spatial resolution of the dual MCP detector is 186 &mu;m, and the DQE can reach 6.2%, which will ensure the dual MCP-based framing cameras can obtain imploded capsule images with higher signal-to-noise ratio and spatial resolution. The influence of MCP parameters on DQE and spatial resolution was analyzed, and the simulation method will provide an important reference for further optimization of the detector.<br/></div> &copy; 2023 SPIE.
Number of references:13
Main heading:Quantum efficiency
Controlled terms:Cameras - Conversion efficiency - Image resolution - Inertial confinement fusion - Photoelectricity - Secondary emission - Signal to noise ratio - X ray detectors - X ray radiography
Uncontrolled terms:COMPTON - Compton radiography - Detection quantum efficiencies - Detective quantum efficiency - Hard x-ray imaging - Micro channel plate - Secondary electrons - Spatial resolution - X-ray framing camera - X-ray imaging detector
Classification code:525.5  Energy Conversion Issues - 701.1  Electricity: Basic Concepts and Phenomena - 716.1  Information Theory and Signal Processing - 741.1  Light/Optics - 742.2  Photographic Equipment - 931.4  Quantum Theory; Quantum Mechanics - 932.2.1  Fission and Fusion Reactions
Numerical data indexing:Electron volt 4.00E+04eV to 2.00E+05eV, Percentage 5.10E+01%, Percentage 6.20E+00%, Size 1.86E-04m
DOI:10.1117/12.2666993
Funding details:  Number: 12075311,52175433, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: GJJSTD20220006,XAB2020YN10,XDA25030900,XDA25031100, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 2021402, Acronym: YIPA CAS, Sponsor: Youth Innovation Promotion Association of the Chinese Academy of Sciences;
Funding text:The work is supported by National Natural Science Foundation of China (Grants No. 12075311 and No. 52175433), the Youth Innovation Promotion Association CAS (Grant No. 2021402), Strategic Priority Research Program of Chinese Academy of Sciences (Grants No. XDA25030900 and No. XDA25031100), the CAS "Light of West China" Program (Grant No. XAB2020YN10) and the Scientific Instrument Developing Project of the Chinese Academy of Sciences (Grant No. GJJSTD20220006).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 137>
 
Accession number:20230133034
Title:Study of Sub-Pixel Gray Degree Reconstruction Method for Simulation of Faint Star Element Target Position
Authors:Wu, Linghao (1); Wang, Jiaan (1); Jia, Wentao (2); Zhang, Jian (3); Sun, Jingrui (3) 
Author affiliation:(1) Department of Measurement and Control Technology and Instrumentation, Changzhou Institute of Technology, Changzhou; 213032, China; (2) Key Laboratory of Space Precision Measurement Technology, Chinese Academy of Sciences, Xian; 710119, China; (3) State Key Laboratory of Optoelectronic Measurement, Control and Optical Information Transmission, Changchun University of Science and Technology, Changchun; 130022, China 
Corresponding authors:Wu, Linghao(101222670@czu.cn); Sun, Jingrui(101222670@czu.cn)
Source title:SSRN
Issue date:April 19, 2023
Publication year:2023
Language:English
ISSN:15565068
Document type:Preprint (PP)
Publisher:SSRN
Abstract:<div data-language="eng" data-ev-field="abstract">The simulation accuracy of the faint star element target (FSET) position is a key factor that affects the accuracy of the precision test of the star sensor. In order to solve the problem that the position accuracy of FSET is restricted by the size of its component elements, the mathematical representation of FSET position correction and the grayscale distribution of the component elements is derived, and the Gaussian radius and grayscale energy coefficient model of FSET is established. According to the measured distribution results of the position error of the full-field FSET, the gray distribution of the basic element is reconstructed by reconstructing each correction set to simulate FSET, and the correction accuracy of the sub-pixel level FSET position is realized. The experimental results show that, compared with the existing correction methods, the position accuracy of FSET is improved by 1.64 times after subpixel gray reconstruction.<br/></div> &copy; 2023, The Authors. All rights reserved.
Number of references:18
Main heading:Pixels
Controlled terms:Stars
Uncontrolled terms:Component elements - Faint stars - Gray reconstruction of weak star target - Position accuracy - Simulation tests - Star sensors - Star simulator - Sub-pixels - Target position - The spacecraft ground simulation test calibration device
Classification code:657.2  Extraterrestrial Physics and Stellar Phenomena
DOI:10.2139/ssrn.4423797
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.Preprint ID:4423797
Preprint source website:https://papers.ssrn.com/sol3/papers.cfm
Preprint ID type:SSRN
 
 
<RECORD 138>
 
Accession number:20230713587717
Title:Evaluation of grinding characteristics for sapphire ultra-precision grinding using small grit sizes wheels based on AE signals
Authors:Wang, Sheng (1); Sun, Guoyan (2, 3); Zhao, Qingliang (1); Yang, Xiaodong (4) 
Author affiliation:(1) Center for Precision Engineering, School of Mechatronics Engineering, Harbin Institute of Technology, Harbin; 150001, China; (2) College of Artificial Intelligence, National University of Defense Technology, Changsha; 410073, China; (3) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (4) Department of Mechanical Engineering and Automation, Harbin Institute of Technology, Harbin; 150001, China 
Corresponding author:Zhao, Qingliang(zhaoqingliang@hit.edu.cn)
Source title:Journal of Manufacturing Processes
Abbreviated source title:J. Manuf. Processes
Volume:90
Issue date:March 24, 2023
Publication year:2023
Pages:94-110
Language:English
ISSN:15266125
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">This paper focused on the grinding characteristics for sapphire ultra-precision grinding with small grit size grinding wheels and acoustic emission signal monitoring of material removal mechanism under the action of multiple abrasive grain. The results show that the use of small grit size grinding wheels allowed for effective removal of sapphire and they facilitated the production of ductile surfaces at the correct parameters. The grinding depth was the most significant effect on the grinding characteristics, the grinding force and subsurface damage scale increased with the grinding depth, and the grinding surface morphology developed from ductile surface to low damage ductile surface and brittle fracture surface. The material removal behavior can be monitored with acoustic emission signals, the original signal, frequency domain and wavelet decomposition features were distinct attributed to the different material removal modes. Besides, low-scale subsurface damage also occurred at the parameters of small size grits and minimal grinding depth.<br/></div> &copy; 2023 The Society of Manufacturing Engineers
Number of references:53
Main heading:Grinding (machining)
Controlled terms:Acoustic emission testing - Brittle fracture - Ductile fracture - Frequency domain analysis - Sapphire - Surface morphology - Topography - Wavelet decomposition - Wheels
Uncontrolled terms:Acoustic emission signal - Acoustic-emissions - AE signals - Ductile brittle transition - Grinding characteristics - Grit size - Material removal mechanisms - Signal monitoring - Sub-surface damage - Ultraprecision grinding
Classification code:482.2.1  Gems - 601.2  Machine Components - 604.2  Machining Operations - 751.2  Acoustic Properties of Materials - 921.3  Mathematical Transformations - 951  Materials Science
DOI:10.1016/j.jmapro.2023.02.009
Funding details:  Number: 52105493, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: XAB2019B24, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 4139ZRY4, Acronym: -, Sponsor: China Postdoctoral Science Foundation;Number: 2018YFA0703400, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;
Funding text:The authors are appreciative of the support from the National Key Research and Development Program of China [ 2018YFA0703400 ], National Natural Science Foundation of China (NSFC) [ 52105493 ], the CAS Light of West China Program [ XAB2019B24 ], and the China Postdoctoral Science Foundation [ 4139ZRY4 ].
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 139>
 
Accession number:20230613555334
Title:Monitoring of ductile&ndash;brittle transition mechanisms in sapphire ultra-precision grinding used small grit size grinding wheel through force and acoustic emission signals
Authors:Wang, Sheng (1); Sun, Guoyan (2, 3); Zhao, Qingliang (1); Yang, Xiaodong (4) 
Author affiliation:(1) Center for Precision Engineering, School of Mechatronics Engineering, Harbin Institute of Technology, Harbin; 150001, China; (2) College of Artificial Intelligence, National University of Defense Technology, Changsha; 410073, China; (3) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (4) Department of Mechanical Engineering and Automation, Harbin Institute of Technology, Harbin; 150001, China 
Corresponding author:Zhao, Qingliang(zhaoqingliang@hit.edu.cn)
Source title:Measurement: Journal of the International Measurement Confederation
Abbreviated source title:Meas J Int Meas Confed
Volume:210
Issue date:March 31, 2023
Publication year:2023
Article number:112557
Language:English
ISSN:02632241
CODEN:MSRMDA
Document type:Journal article (JA)
Publisher:Elsevier B.V.
Abstract:<div data-language="eng" data-ev-field="abstract">Progressive ultra-precision grinding experiments used small grit size grinding wheels were performed to investigate the ductile&ndash;brittle transition process of sapphire, force and AE signals were employed to monitor the material removal behavior. Precision dressing and measurement of circular arc grinding wheels were performed to meet the minimum grinding depth for ultra-precision grinding. A grinding force model was proposed to interpret the grinding forces in different materials removal modes. A continuous complete ductile&ndash;brittle transition process was observed and monitored, the progressive grinding was divided into three stages: ductile dominant, ductile&ndash;brittle transition and brittle eruption. The grinding force, surface profile, micro morphology and brittle fracture percentage were discussed. Brittle fracture will not entirely occur, but rather brittle fracture and ductile grooves were coexisted on the surface in the brittle eruption stage, which was attributed to the grinding characteristics of small grit wheels. In addition, raw AE signals and multiple transformation forms were utilized to monitor the material removal behavior and their respective roles were analyzed. The Fourier transform, discrete wavelet, continuous wavelet and wavelet coefficients in different stages can all establish a mapping relationship with material removal modes.<br/></div> &copy; 2023
Number of references:45
Main heading:Brittle fracture
Controlled terms:Acoustic emission testing - Ductile fracture - Fourier series - Grinding (machining) - Grinding wheels - Morphology - Sapphire
Uncontrolled terms:Acoustic-emissions - AE signals - Ductile brittle transition - Grinding force - Grit size - Material removal behaviours - Material removal mode - Online monitoring - Transition process - Ultraprecision grinding
Classification code:482.2.1  Gems - 604.2  Machining Operations - 751.2  Acoustic Properties of Materials - 921.3  Mathematical Transformations - 931.2  Physical Properties of Gases, Liquids and Solids - 951  Materials Science
DOI:10.1016/j.measurement.2023.112557
Funding details:  Number: 52105493, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: XAB2019B24, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 4139ZRY4, Acronym: -, Sponsor: China Postdoctoral Science Foundation;Number: 2018YFA0703400, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;
Funding text:The authors wish to acknowledge the support of the National Key Research and Development Program of China [2018YFA0703400], the National Natural Science Foundation of China (NSFC) [52105493], the CAS Light of West China Program [XAB2019B24], and the China Postdoctoral Science Foundation [4139ZRY4].
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 140>
 
Accession number:20231714005636
Title:Optical design and fabrication of a common-aperture multispectral imaging system for integrated deep space navigation and detection
Authors:Cao, Jiajing (1); Chang, Jun (1); Huang, Yi (1); Wu, Yunan (1); Ji, Zhongye (1); Lai, Xiaoxiao (1); Wang, Junya (1); Li, Yiting (1); Zhu, Weihong (2); Li, Xuyang (3) 
Author affiliation:(1) Key Laboratory of Photoelectronic Imaging Technology and System of Ministry of Education of China, School of Optics and Photonics, Beijing Institute of Technology, Beijing; 100081, China; (2) Institute of Spacecraft System Engineering, Beijing; 100094, China; (3) Space Optics Lab, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China 
Corresponding author:Chang, Jun(optics_chang@126.com)
Source title:Optics and Lasers in Engineering
Abbreviated source title:Opt Lasers Eng
Volume:167
Issue date:August 2023
Publication year:2023
Article number:107619
Language:English
ISSN:01438166
CODEN:OLENDN
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">Multispectral imaging systems enable the simultaneous acquisition of spatial and multispectral information about a target, thereby improving the capability of all-weather autonomous spacecraft operations for sensing measurements and condition identification. This paper reports designing and constructing a common-aperture multispectral imaging system (CAMIS) that can simultaneously obtain ultraviolet, visible, mid-wave, and long-wave infrared wavebands. Such a system can simultaneously realize distant stars' navigation and multispectral detection. An experimental setup was constructed to verify the basic principles of the device. The device is used to image an optical-resolution target and a pinhole. The results indicated that the system could perform celestial navigation in the visible waveband and image objects well in multiple wavebands, thereby realizing the integration of deep-space navigation and detection.<br/></div> &copy; 2023 Elsevier Ltd
Number of references:27
Main heading:Optical design
Controlled terms:Imaging systems - Infrared radiation - Navigation
Uncontrolled terms:Common aperture - Deep space navigation and detection - Deep-space navigation - Multi-spectral - Multi-spectral imaging systems - Multispectral imaging - Optical design and fabrication - Simultaneous acquisition - Space detection - Wavebands
Classification code:741.1  Light/Optics - 746  Imaging Techniques
DOI:10.1016/j.optlaseng.2023.107619
Funding details:  Number: 2021YFC2202100, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;
Funding text:The work is supported by National Key R&D Program of 327 China ( 2021YFC2202100 ).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 141>
 
Accession number:20225113273729
Title:Energy-Efficient Design for a NOMA Assisted STAR-RIS Network With Deep Reinforcement Learning    (Open Access)
Authors:Guo, Yi (1, 2, 3); Fang, Fang (4); Cai, Donghong (5); Ding, Zhiguo (6) 
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (2) Xi'an Jiaotong University, School of Information and Communications Engineering, Xi'an; 710049, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China; (4) Western University, Department of Electrical and Computer Engineering, Department of Computer Science, London; ON; N6A 3K7, Canada; (5) Jinan University, College of Cyber Security, Guangzhou; 510632, China; (6) The University of Manchester, School of Electrical and Electronic Engineering, Manchester; M13 9PL, United Kingdom 
Corresponding author:Guo, Yi(guoyi@opt.ac.cn)
Source title:IEEE Transactions on Vehicular Technology
Abbreviated source title:IEEE Trans. Veh. Technol.
Volume:72
Issue:4
Issue date:April 1, 2023
Publication year:2023
Pages:5424-5428
Language:English
ISSN:00189545
E-ISSN:19399359
CODEN:ITVTAB
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Simultaneous transmitting and reflecting reconfigurable intelligent surfaces (STAR-RISs) have been considered promising auxiliary devices to enhance the performance of the wireless network, where users located at different sides of the surfaces can be simultaneously served by the transmitting or reflecting signals. In this article, an energy efficiency (EE) optimization problem for non-orthogonal multiple access (NOMA) assisted STAR-RIS downlink network is investigated. Due to the fractional form of the objective function, it is challenging to solve the EE optimization problem using traditional convex optimization solutions. This article proposes a deep deterministic policy gradient (DDPG)-based algorithm to maximize the EE by jointly optimizing the transmission beamforming vectors at the base station and the coefficients matrices at the STAR-RIS. Simulation results demonstrate that the proposed algorithm can effectively maximize the system EE considering the time-varying channels.<br/></div> &copy; 1967-2012 IEEE.
Number of references:12
Main heading:Energy efficiency
Controlled terms:Convex optimization - Deep learning - Reinforcement learning - Stars
Uncontrolled terms:Deep deterministic policy gradient - Deterministics - Multiple access - Multiple inputs - Multiple-input and single-output - Non-orthogonal - Non-orthogonal multiple access - Policy gradient - Reconfigurable - Simultaneous transmitting and reflecting reconfigurable intelligent surface
Classification code:461.4  Ergonomics and Human Factors Engineering - 525.2  Energy Conservation - 657.2  Extraterrestrial Physics and Stellar Phenomena - 723.4  Artificial Intelligence
DOI:10.1109/TVT.2022.3224926
Funding details:  Number: 201904910016, Acronym: CSC, Sponsor: China Scholarship Council;
Funding text:The work of YiGuo was supported by China Scholarship Council under Grant 201904910016.
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Green
 
<RECORD 142>
 
Accession number:20231814038467
Title:Deep learning methods for medical image fusion: A review
Authors:Zhou, Tao (1, 4); Cheng, QianRu (1, 4); Lu, HuiLing (2); Li, Qi (1, 4); Zhang, XiangXiang (1, 4); Qiu, Shi (3) 
Author affiliation:(1) School of Computer Science and Engineering, North Minzu University, Yinchuan; 750021, China; (2) School of Science, Ningxia Medical University, Yinchuan; 750004, China; (3) Key Laboratory of Spectral Imaging Technology CAS, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (4) Key Laboratory of Image and Graphics Intelligent Processing of State Ethnic Affairs Commission, North Minzu University, Yinchuan; 750021, China 
Corresponding authors:Cheng, QianRu(chengqianru5@163.com); Lu, HuiLing(Lu_huiling@163.com)
Source title:Computers in Biology and Medicine
Abbreviated source title:Comput. Biol. Med.
Volume:160
Issue date:June 2023
Publication year:2023
Article number:106959
Language:English
ISSN:00104825
E-ISSN:18790534
CODEN:CBMDAW
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">The image fusion methods based on deep learning has become a research hotspot in the field of computer vision in recent years. This paper reviews these methods from five aspects: Firstly, the principle and advantages of image fusion methods based on deep learning are expounded; Secondly, the image fusion methods are summarized in two aspects: End-to-End and Non-End-to-End, according to the different tasks of deep learning in the feature processing stage, the non-end-to-end image fusion methods are divided into two categories: deep learning for decision mapping and deep learning for feature extraction. According to the different types of the networks, the end-to-end image fusion methods are divided into three categories: image fusion methods based on Convolutional Neural Network, Generative Adversarial Network, and Encoder-Decoder Network; Thirdly, the application of the image fusion methods based on deep learning in medical image field is summarized from two aspects: method and data set; Fourthly, evaluation metrics commonly used in the field of medical image fusion are sorted out from 14 aspects; Fifthly, the main challenges faced by the medical image fusion are discussed from two aspects: data sets and fusion methods. And the future development direction is prospected. This paper systematically summarizes the image fusion methods based on the deep learning, which has a positive guiding significance for the in-depth study of multi modal medical images.<br/></div> &copy; 2023
Number of references:101
Main heading:Generative adversarial networks
Controlled terms:Convolution - Convolutional neural networks - Decoding - Deep learning - Image fusion - Learning systems - Medical imaging - Network coding
Uncontrolled terms:Convolutional neural network - Data set - Deep learning - Encoder-decoder - Encoder-decoder network - End to end - Hotspots - Image fusion methods - Learning methods - Medical image fusion
Classification code:461.1  Biomedical Engineering - 461.4  Ergonomics and Human Factors Engineering - 716.1  Information Theory and Signal Processing - 723.2  Data Processing and Image Processing - 723.4  Artificial Intelligence - 746  Imaging Techniques
DOI:10.1016/j.compbiomed.2023.106959
Funding details:  Number: 2020BEB04022, Acronym: -, Sponsor: Key Research and Development Program of Ningxia;Number: 62062003, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2020KYQD08,2022AAC03149, Acronym: -, Sponsor: Natural Science Foundation of Ningxia Province;Number: -, Acronym: MNU, Sponsor: North Minzu University;
Funding text:This research was funded by the National Natural Science Foundation of China , grant no. 62062003 , Key Research and Development Program of Ningxia , grant no. 2020BEB04022 , Natural Science Foundation of Ningxia Province , grant no. 2022AAC03149 , and Key Research and Development Program of Ningxia , grant no. 2020KYQD08 .This project was carried out by Tao Zhou's Laboratory of Computer Science and Engineering School of North Minzu University. It was guided and supported by the research direction of Tao Zhou's team from North Minzu University of science and technology . We sincerely thank them for their help in revising the paper.This research was funded by the National Natural Science Foundation of China, grant no.62062003, Key Research and Development Program of Ningxia, grant no.2020BEB04022, Natural Science Foundation of Ningxia Province, grant no.2022AAC03149, and Key Research and Development Program of Ningxia, grant no.2020KYQD08.This project was carried out by Tao Zhou's Laboratory of Computer Science and Engineering School of North Minzu University. It was guided and supported by the research direction of Tao Zhou's team from North Minzu University of science and technology. We sincerely thank them for their help in revising the paper.
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 143>
 
Accession number:20231013682084
Title:Nested multi-scale transform fusion model: The response evaluation of chemoradiotherapy for patients with lung tumors
Authors:Zhou, Tao (1, 4); Liu, Shan (1, 4); Lu, Huiling (2); Bai, Jing (1, 4); Zhi, Lijia (1, 4); Shi, Qiu (3) 
Author affiliation:(1) School of Computer Science and Engineering, North Minzu University, Ningxia, Yinchuan; 750021, China; (2) School of Science, Ningxia Medical University, Ningxia, Yinchuan; 750004, China; (3) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (4) The Key Laboratory of Images and Graphics Intelligent Processing of State Ethnic Affairs Commission, North Minzu University, Yinchuan; 750021, China 
Corresponding author:Lu, Huiling(lu_huiling@163.com)
Source title:Computer Methods and Programs in Biomedicine
Abbreviated source title:Comput. Methods Programs Biomed.
Volume:232
Issue date:April 2023
Publication year:2023
Article number:107445
Language:English
ISSN:01692607
E-ISSN:18727565
CODEN:CMPBEK
Document type:Journal article (JA)
Publisher:Elsevier Ireland Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">Background and Objective: The response evaluation of chemoradiotherapy is an important method of precision treatment for patients with malignant lung tumors. In view of the existing evaluation criteria for chemoradiotherapy, it is difficult to synthesize the geometric and shape characteristics of lung tumors. In the present, the response evaluation of chemoradiotherapy is limited. Therefore, this paper constructs a response evaluation system of chemoradiotherapy based on PET/CT images. Methods: There are two parts in the system: a nested multi-scale fusion model and an attribute sets for the Response evaluation of chemoradiotherapy (AS-REC). In the first part, a new nested multi-scale transform method, i.e., latent low-rank representation (LATLRR) and non-subsampled contourlet transform (NSCT), is proposed. Then, the average gradient self-adaptive weighting is used for the low-frequency fusion rule, and the regional energy fusion rule is used for the high-frequency fusion rule. Further, the low-rank part fusion image is obtained by the inverse NSCT, and the fusion image is generated by adding the low-rank part fusion image and the significant part fusion image. In the second part, AS-REC is constructed to evaluate the growth direction of the tumor, the degree of tumor metabolic activity, and the tumor growth state. Results: the numerical results clearly show that the performance of our proposed method outperforms in comparison with several existing methods, among them, the value of Qabf increased by up to 69%. Conclusions: Through the experiment of three reexamination patients, the effectiveness of the evaluation system of radiotherapy and chemotherapy are proved.<br/></div> &copy; 2023 Elsevier B.V.
Number of references:26
Main heading:Chemotherapy
Controlled terms:Biological organs - Chemoradiotherapy - Contourlet transform - Image fusion - Inverse problems - Numerical methods - Tumors
Uncontrolled terms:Attribute set for the response evaluation of chemoradiotherapy - Attribute sets - Contourlet transform - Fusion image - Latent low-rank representation - Low-rank representations - Lung tumor - Non-subsampled contourlet - Non-subsampled contourlet transform - PET/CT fusion
Classification code:461.2  Biological Materials and Tissue Engineering - 461.6  Medicine and Pharmacology - 723.2  Data Processing and Image Processing - 921.3  Mathematical Transformations - 921.6  Numerical Methods
Numerical data indexing:Percentage 6.90E+01%
DOI:10.1016/j.cmpb.2023.107445
Funding details:  Number: 2020KYQD08, Acronym: -, Sponsor: -;Number: 62062003, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2022AAC03149, Acronym: -, Sponsor: Natural Science Foundation of Ningxia Province;
Funding text:This work was supported in part by the Natural Science Foundation of China under Grant No. 62062003 , Natural Science Foundation of Ningxia under Grant No. 2022AAC03149, North Minzu University Research Project of Talent Introduction under Grant No. 2020KYQD08.
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 144>
 
Accession number:20230313385584
Title:Optical design and implementation of a compact and long focal length imaging system
Authors:Zhong, Yue (1); Chang, Jun (1); Zhao, Xuehui (1); Du, Shan (1); Mu, Yu (1); Jiang, Huilin (1, 2); Li, Xuyang (3) 
Author affiliation:(1) Key Laboratory of Photoelectronic Imaging Technology and System of Ministry of Education of China, School of Optics and Photonics, Beijing Institute of Technology, Beijing; 100081, China; (2) School of Opto-Electronic Engineering, Changchun University of Science and Technology, Changchun; 130022, China; (3) Space Optics Lab, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China 
Corresponding author:Chang, Jun(optics_chang@126.com)
Source title:Optics and Lasers in Engineering
Abbreviated source title:Opt Lasers Eng
Volume:163
Issue date:April 2023
Publication year:2023
Article number:107467
Language:English
ISSN:01438166
CODEN:OLENDN
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">In this paper, we demonstrate a compact and long focal length imaging system for building detection. This system is an all-spherical system. In order to avoid the use of aspheres, the system relies on two groups of correction elements to correct aberrations. This allows for short manufacturing cycles and simplified adjustments. The system works in the visible band from 460 nm to 750 nm. The focal length is 900 mm, and the optical length is only 280 mm. The designed modulation transfer function (MTF) is consistent with the diffraction limit. The MTF curve is 0.63 at the Nyquist frequency of 78 lp/mm. The optomechanical structure is developed based on the analysis consequence of tolerance and stray light, and a device is fabricated. We also propose a simplified method for measuring the space between the primary mirror and the secondary mirror in a compact coaxial optical system. According to the experimentation, the device is proven to meet the application requirement. Detailed descriptions of the design and implementation are provided.<br/></div> &copy; 2022 Elsevier Ltd
Number of references:27
Main heading:Optical design
Controlled terms:Diffraction - Imaging systems - Mirrors - Optical systems - Optical transfer function - Stray light
Uncontrolled terms:All-spherical system - Aspheres - Building detection - Correction elements - Design and implementations - Long focal lengths - Manufacturing cycle - Optical length - Visible band
Classification code:741.1  Light/Optics - 741.3  Optical Devices and Systems - 746  Imaging Techniques
Numerical data indexing:Size 2.80E-01m, Size 4.60E-07m to 7.50E-07m, Size 9.00E-01m
DOI:10.1016/j.optlaseng.2022.107467
Funding details:  Number: 2021YFC2202100, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;
Funding text:The work is supported by National Key R&D Program of China (2021YFC2202100).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 145>
 
Accession number:20224313003896
Title:The generation and observation of pulses with switchable single/dual wavelengths and tunable bandwidth from a SWNT mode-locked Er-doped fiber laser
Authors:Hu, Guoqing (1, 2); Wang, Chen (1, 2); Chen, Kai (3); Wen, Junyue (1, 2); Guo, Guowen (1, 2); Liu, Ya (4); Chen, Guangwei (1, 2); Zhu, Lianqing (1, 2) 
Author affiliation:(1) Key Laboratory of the Ministry of Education for Optoelectronic Measurement Technology and Instrument, Beijing Information Science & Technology University, Beijing; 100192, China; (2) Beijing Laboratory of Optical Fiber Sensing and System, Beijing Information Science & Technology University, Beijing; 100016, China; (3) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an; 710119, China; (4) Yunnan Key Laboratory of Opto-Electronic Information Technology, School of Physics and Electronic Information Technology, Yunnan Normal University, Kunming; 650500, China 
Corresponding author:Zhu, Lianqing(guoqing2011@foxmail.com)
Source title:Optics and Laser Technology
Abbreviated source title:Opt Laser Technol
Volume:158
Issue date:February 2023
Publication year:2023
Article number:108715
Language:English
ISSN:00303992
CODEN:OLTCAS
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">Mode-locked pulse outputs with switchable single/dual wavelengths and widely tunable spectral bandwidth are demonstrated by fully exploiting multiple soliton formation mechanisms combining single-wall carbon nanotube, intracavity loss tuning and nonlinear polarization rotation. An isolator with single-polarization fiber pigtails is additionally inserted in a ring fiber laser cavity to introduce polarization-dependent loss modulation for gain profile tuning and nonlinear polarization rotation. Mode-locked by a home-made single-wall carbon nanotube saturable absorber, switchable single/dual-wavelength pulses centered in the 1530- or/and 1550-nm gain regions of erbium-doped fiber are experimentally observed by tuning the intracavity loss to tilt the gain profile. Moreover, the spectral bandwidths of single-wavelength pulses centered in the 1530- and 1550 nm regions could be continuously tuned from 2.4 to 4.0 nm, and 2.7 to 9.0 nm, respectively. Such widely tunable spectral bandwidths are attributed to hybrid mode-locked mechanisms combining the nonlinear polarization rotation and single-wall carbon nanotube. Our results give a deep insight into the well-controlled gain profile tuning and provide a relatively simple setup and method to obtain bandwidth-tunable, wavelength-switchable pulse outputs, showing the potential to meet various requirements of ultrafast laser applications.<br/></div> &copy; 2022
Number of references:54
Main heading:Fiber lasers
Controlled terms:Bandwidth - Fibers - Locks (fasteners) - Mode-locked fiber lasers - Polarization - Rotation - Single-walled carbon nanotubes (SWCN) - Ultrafast lasers
Uncontrolled terms:Dual-wavelength - Intracavity loss - Intracavity loss tuning - Mode-locked - Mode-locked pulse - Nonlinear polarization rotation - Single Wall - Single-wall carbon nanotube - Spectral bandwidth - Switchable
Classification code:716.1  Information Theory and Signal Processing - 744.1  Lasers, General - 744.4  Solid State Lasers - 761  Nanotechnology - 931.1  Mechanics - 933.1  Crystalline Solids
Numerical data indexing:Size 1.53E-06m, Size 1.55E-06m, Size 2.40E-09m to 4.00E-09m, Size 2.70E-09m to 9.00E-09m
DOI:10.1016/j.optlastec.2022.108715
Funding details:  Number: KM202211232001, Acronym: -, Sponsor: -;Number: 52105540,61801030,61903042,62005020,62105036,62105038, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2214058,3204047,4202027,4212048,4214081,51535002, Acronym: -, Sponsor: Natural Science Foundation of Beijing Municipality;
Funding text:This work is supported by R&D Program of Beijing Municipal Education Commission (KM202211232001), National Natural Science Foundation of China (62105038, 62105036, 52105540, 62005020, 61903042, 61801030); Beijing Natural Science Foundation (3204047, 4214081, 2214058, 4212048, 4202027); Key Projects of the National Natural Science Foundation of China (51535002).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 146>
 
Accession number:20230713574407
Title:A pupil detection method based on Unet with attention module and shape-prior loss
Authors:Song, Wenhui (1, 2, 3); Wang, Hui (1, 2, 3); Gui, Yawei (1, 2, 3); Dang, Ruochen (1, 2, 3); Hu, Bingliang (1, 3); Wang, Quan (1, 3) 
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology, Xi an Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Key Laboratory of Biomedical Spectroscopy of Xi an, Key Laboratory of Spectral Imaging Technology, Xi an Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences, Xi'an; 710119, China 
Corresponding authors:Hu, Bingliang(hbl@opt.ac.cn); Wang, Quan(wangquan@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12558
Part number:1 of 1
Issue title:AOPC 2022: Optical Spectroscopy and Imaging
Issue date:2023
Publication year:2023
Article number:125580L
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510662308
Document type:Conference article (CA)
Conference name:2022 Applied Optics and Photonics China: Optical Spectroscopy and Imaging, AOPC 2022
Conference date:December 18, 2022  -  December 19, 2022
Conference location:Virtual, Online, China
Conference code:186190
Sponsor:Chinese Society for Optical Engineering (CSOE)
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">In recent years, pupil detection in human eye images or videos has played a key role in many fields. In the field of eye tracking, the position of the center of the pupil is a basic problem, and the error of pupil detection will be magnified in subsequent calculations, which will seriously affect the performance of eye tracking. In this paper, we propose to use the currently popular semantic segmentation network for pupil detection task. We first train the Unet architecture as a benchmark, then introduce two different attention modules into Unet, and compare with the benchmark network. The results show that our method has a higher detection rate within 1-15 pixel errors. We also added an ellipse fitting error term to the loss function of the network to further improve the network performance. The training of the model is done on the LPW dataset. Finally, we also investigate the effect of data augmentation on generalization performance, with the model trained on the LPW dataset and tested on the I-SOCIALDB dataset. Although data enhancement slightly reduces the detection rate of the model in the original data set, it can improve the generalization performance of the model.<br/></div> &copy; COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.
Number of references:12
Main heading:Eye tracking
Controlled terms:Semantics
Uncontrolled terms:Attention mechanisms - Data augmentation - Eye-tracking - Infrared and visible light image - Infrared light - Pupils detection - Shape priors - Shape-prior loss - Unet - Visible light images
DOI:10.1117/12.2651952
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 147>
 
Accession number:20230613542994
Title:VG-Swarm: A Vision-Based Gene Regulation Network for UAVs Swarm Behavior Emergence    (Open Access)
Authors:Li, Huanlin (1); Cai, Yuwei (1); Hong, Juncao (1); Xu, Peng (1); Cheng, Hui (2); Zhu, Xiaomin (3); Hu, Bingliang (4); Hao, Zhifeng (1); Fan, Zhun (1) 
Author affiliation:(1) University of Shantou, Key Lab of Digital Signal and Image Processing of Guangdong Province, College of Engineering, Guangdong; 515063, China; (2) University of Sun Yat-Sen, School of Computer Science and Engineering, Guangdong; 510006, China; (3) College of Systems Engineering, National University of Defense Technology Changsha, Hunan; 410073, China; (4) Xi'An Institute of Optics and Precision Mechanics, Shanxi; 710119, China 
Corresponding author:Fan, Zhun(zfan@stu.edu.cn)
Source title:IEEE Robotics and Automation Letters
Abbreviated source title:IEEE Robot. Autom.
Volume:8
Issue:3
Issue date:March 1, 2023
Publication year:2023
Pages:1175-1182
Language:English
E-ISSN:23773766
Document type:Journal article (JA)
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">We present VG-Swarm, a practical and effective method for aerial robots dynamic encirclement, which consists of a vision-based gene regulatory network (V-GRN) and a visual perception module. For each flying robot deployed with the proposed method, the relative spatial positions of the surrounding robots, targets, and obstacles are first obtained by omnidirectional monocular vision. Then the proposed method is used to generate the concentration field within its own perception range according to the obtained position information. The agent individually calculates and selects an optimal moving direction in its concentration field, and finally stays on its selected encirclement pattern (a closed concentration contour around the target). As a result, a swarm of flying robots can emerge adaptive pattern formations to entrap the targets even without any communication and global information. We verify the effectiveness and robustness of the proposed method in various simulations and real-world experiments.<br/></div> &copy; 2016 IEEE.
Number of references:23
Main heading:Robots
Controlled terms:Antennas - Behavioral research - Genes - Swarm intelligence - Vision
Uncontrolled terms:Adaptation models - Aerial system: perception and autonomy - Aerial systems - Behavioral science - Biologically-inspired robots - Pattern formation - Swarm robotics - System perception - Vision based - Visual perception
Classification code:461.2  Biological Materials and Tissue Engineering - 461.4  Ergonomics and Human Factors Engineering - 723.4  Artificial Intelligence - 731.5  Robotics - 971  Social Sciences
DOI:10.1109/LRA.2023.3236565
Funding details:  Number: 62176147, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2021ZD0111502, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;
Funding text:Thisworkwas supported in part by the National Key R&D Program of China under Grant 2021ZD0111502 and in part by the National Natural Science Foundation of China under Grant 62176147.
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Green
 
<RECORD 148>
 
Accession number:20230613559817
Title:Design of Large Aperture and Large Field of View Receiving Optical System Based on Catadioptric System
Authors:Chao, Li (1, 2); Yingjun, Ma (1); Youhui, Huo (1, 3); Weining, Chen (1) 
Author affiliation:(1) Xi&rsquo;an Institute Optics and Precision Mechanics, Chinese Academ of Sciences, Shaanxi, Xi&rsquo;an; 710119, China; (2) Shaanxi Normal University, ShaanXi, Xi&rsquo;an; 710119, China; (3) University of Chinses Academy of Sciences, Beijing; 100049, China 
Corresponding author:Weining, Chen(cwn@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12559
Part number:1 of 1
Issue title:AOPC 2022: Novel Optical Design; and Optics Ultra Precision Manufacturing and Testing
Issue date:2023
Publication year:2023
Article number:125590E
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510662322
Document type:Conference article (CA)
Conference name:2022 Applied Optics and Photonics China: Novel Optical Design; and Optics Ultra Precision Manufacturing and Testing, AOPC 2022
Conference date:December 18, 2022  -  December 19, 2022
Conference location:Virtual, Online, China
Conference code:186191
Sponsor:Chinese Society for Optical Engineering (CSOE)
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">The structure of the initial system is calculated according to the aberration theory, in which the radius of the primary mirror is 300 mm, the radius of the secondary mirror is 320 mm, the distance between the primary mirror and the secondary mirror is 90 mm, and the blocking ratio is close to 0.4, and the occlusion ratio is close to 0.4. A three-piece correction lens set is designed to solve the spherical aberration and comet aberration caused by the Cassegrain system in the large field of view, and the imaging of the edge field of view of the large field of view system is realized. Through the optimization and layout of the overall system, the MTF value of the system is finally greater than 0.4 within the frequency of 130 lp/mm. This paper provides important reference value for the design of catadioptric optical system with large aperture and large field of view.<br/></div> &copy; 2023 SPIE.
Number of references:10
Main heading:Optical design
Controlled terms:Aberrations - Aspherics - Mirrors - Optical systems
Uncontrolled terms:Aberration theory - Aperture fields - Cassegrain - Cassegrain system - Catadioptrics - Imaging quality - Large aperture - Large field of views - Primary mirrors - Secondary mirror
Classification code:741.1  Light/Optics - 741.3  Optical Devices and Systems
Numerical data indexing:Size 3.00E-01m, Size 3.20E-01m, Size 9.00E-02m
DOI:10.1117/12.2651842
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 149>
 
Accession number:20231914072408
Title:An Overview of Spaceborne Atmospheric Wind Field Measurement with Passive Optical Remote Sensing
Title of translation:&#26143; &#36733; &#34987; &#21160; &#20809; &#23398; &#36965; &#24863; &#22823; &#27668; &#39118; &#22330; &#25506; &#27979; &#25216; &#26415; &#36827; &#23637; &#32508; &#36848;
Authors:Feng, Yutao (1); Fu, Di (1, 2); Zhao, Zengliang (3); Zong, Weiguo (4); Yu, Tao (5); Sheng, Zheng (6); Zhu, Yajun (7) 
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shaanxi, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Beijing Institute of Applied Meteorology, Beijing; 100029, China; (4) Key Laboratory of Space Weather, National Satellite Meteorological Center, National Center for Space Weather, China Meteorological Administration, Beijing; 100081, China; (5) School of Geophysics and Geomatics, China University of Geosciences, Hubei, Wuhan; 430074, China; (6) College of Meteorology and Oceanography, National University of Defense Technology, Hunan, Changsha; 410073, China; (7) State Key Laboratory of Space Weather, National Space Science Center, Chinese Academy of Sciences, Beijing; 100088, China 
Corresponding author:Feng, Yutao(fytciom@126.com)
Source title:Guangxue Xuebao/Acta Optica Sinica
Abbreviated source title:Guangxue Xuebao
Volume:43
Issue:6
Issue date:March 2023
Publication year:2023
Article number:0601011
Language:Chinese
ISSN:02532239
CODEN:GUXUDC
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">Significance Wind field is an important parameter characterizing the dynamic characteristics of the earth's atmospheric system, and it serves as basic data necessary for business work and scientific research in fields such as weather forecasting, space weather, and climatology. The wind field measurement based on satellite remote sensing is not limited by geographical conditions. It can determine the intensity and direction information of the atmospheric wind field at different altitudes by monitoring the motion state of ocean waves, clouds, aerosols, and atmospheric components. It can not only obtain the observation data of ocean, desert, and polar regions, which are difficult to be collected by conventional methods, but also obtain the profile information of the wind field along the height distribution. As one of the main techniques in atmospheric wind field measurement, passive optical remote sensing has the characteristics of high accuracy, large altitude coverage, and small resource occupation. Great progress in the past half century has been made, and various wind measurement technologies have been developed such as atmospheric motion vectors, infrared hyperspectral analysis of water vapor, wind imaging interferometer, and Doppler modulated gas correlation, which can realize wind field measurement in an altitude ranging from 1 km near the surface to 300-400 km and form a reliable verification and capability complementation with active wind field measurement technologies such as lidar and microwave. In order to promote the development of spaceborne passive optical remote sensing for measuring atmospheric wind fields, it is necessary to summarize and discuss the existing research progress and future development trends, so as to provide a reference for the development of future passive optical remote sensing detection technology for atmospheric wind field and the task planning in atmospheric wind field detection. Progress This review focuses on two types of spaceborne optical passive techniques for wind field measurement based on atmospheric motion vector monitoring and atmospheric spectral Doppler shift detection. The fundamental theories, basic inversion methods, and the progress of research and application of representative payloads of various passive wind field detection technologies are summarized (Table 4). The atmospheric motion vector detection technology relies on cloud map observation to realize wind field detection. It has the characteristics of high spatial resolution and high detection accuracy and can obtain meter-level and precise wind field data at a sub-kilometer scale. However, limited by its detection technology mechanism, its detection altitude and efficiency are also significantly restricted. Infrared hyperspectral wind field measurement technology is based on infrared images of specific water vapor spectral channels and profile data to track the movement of characteristic image targets at specific altitudes to invert atmospheric wind speed, which is used for troposphere wind measurement, with high vertical resolution and profile data, and it is less affected by the cloud. Compared with those of the cloud-derived motion vector (CMV) technology, its measurement accuracy and horizontal spatial resolution of wind speed and direction need to be improved. However, as infrared hyperspectral loading and wind field inversion algorithms develop, infrared hyperspectral wind field measurement technology will become an important technology for troposphere wind. The wind field interferometer obtains the interferogram of the fine atmospheric spectrum from the limb observation, inverts the Doppler frequency shift of the atmospheric spectrum through the intensity position or phase change in the interferogram, and then realizes the measurement of the atmospheric wind field. The spaceborne application of this technology began in the late 1960s, and three technical systems have been developed, namely, Michelson interferometer, Fabry-P&eacute;rot interferometer, and Doppler asymmetric spatial heterodyne interferometer. The detection altitude covers most of the atmosphere including the stratosphere, mesosphere, and thermosphere. It features continuous profile detection capability, vertical resolution with an order of kilometers, and horizontal spatial resolution with an order of 100 km, and the highest peak accuracy of wind speed measurement has reached 3 m/s. The Doppler modulated gas correlation technology modulates and filters the incident spectrum through a molecular filter with its composition the same as the target atmospheric composition, so as to realize the frequency shift detection of the atmospheric spectrum and the detection of the wind. Compared with traditional spaceborne wind field measurement technologies, it has the advantages of high horizontal resolution, small size, light weight, and low power consumption and has a good application prospect in the field of small satellite network observation. At present, the technology is still in the stage of technical verification and application testing, and it is expected to further improve the vertical resolution of the limb observation, but the space for improving the effective horizontal resolution is limited. Conclusions and Prospects Through the technical research and payload application in the past 20 to 30 years, China's spaceborne passive optical atmospheric wind field detection technology is gradually narrowing the gap with the international leading level. However, in general, the spaceborne atmospheric wind field detection capability based on passive optical remote sensing still has problems such as discontinuous altitude profile coverage, incomplete local coverage of middle and high level wind field data, and limited spatial resolution of high level wind field data. In the future, the accuracy and resolution of profile data products for tropospheric wind field elements should be improved, and the gaps in China's middle and upper level atmospheric wind field observation data in terms of global scale should be filled. In addition, As China's planetary scientific research and deep-space exploration plans develop, the wind field detection for the atmospheres of Mars, Jupiter, and other planets is also an important direction for the development of wind measurement technology based on passive optical remote sensing.<br/></div> &copy; 2023 Chinese Optical Society. All rights reserved.
Number of references:100
Main heading:Optical remote sensing
Controlled terms:Hyperspectral imaging - Interferometers - Optical radar - Space optics - Vector spaces - Vectors - Water waves - Weather forecasting
Uncontrolled terms:Atmosphere wind field - Cloud-derived motion vector - Dopple modulated gas correlation - Doppler - Gas correlations - Hyper spectra - Infrared hyperspectrum - Motion Vectors - Wind field - Wind interferometer
Classification code:443  Meteorology - 471.4  Seawater, Tides and Waves - 656.1  Space Flight - 716.2  Radar Systems and Equipment - 741.1  Light/Optics - 741.3  Optical Devices and Systems - 746  Imaging Techniques - 921  Mathematics - 921.1  Algebra - 941.3  Optical Instruments
Numerical data indexing:Age 2.00E+01yr to 3.00E+01yr, Size 1.00E+03m, Size 1.00E+05m, Size 3.00E+05m to 4.00E+05m, Velocity 3.00E+00m/s
DOI:10.3788/AOS221462
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 150>
 
Accession number:20230066265
Title:ULTRA BROADBAND COHERENT DIFFRACTIVE IMAGING A FAST MONOCHROMATIZATION METHOD
Authors:Li, Boyang (1) 
Author affiliation:(1) Xi&rsquo;an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi&rsquo;an; 710119, China 
Source title:arXiv
Abbreviated source title:arXiv
Issue date:January 11, 2023
Publication year:2023
Language:English
E-ISSN:23318422
Document type:Preprint (PP)
Publisher:arXiv
Abstract:<div data-language="eng" data-ev-field="abstract">Coherent diffractive imaging (CDI) as a lensless imaging technique, has been applied in a wide range of sciences. However it is not compatible with short pulse lasers, because it is limited with monochromatic illumination. Although there have been reports on the broadband CDI, the bandwidth is limited with 10% for robust imaging. In this article, we report a algorithm which is able to CDI robustly with at least 80% bandwidth. This algorithm is apply to published experiment data and simulated ultra-broadband data to demonstrate its ability. This technique enables us to capture the non-repeatable transient dynamics as short as the laser pulse width, which is one step forward to the ultrafast CDI.<br/></div> Copyright &copy; 2023, The Authors. All rights reserved.
Number of references:17
Main heading:Bandwidth
Controlled terms:Laser pulses - Ultra-wideband (UWB)
Uncontrolled terms:A* algorithm - Broad-band data - Coherent diffractive imaging - Experiment data - Lensless imaging technique - Monochromatic illumination - Monochromatization - Short-pulse lasers - Transient dynamics - Ultra-broadband
Classification code:716.1  Information Theory and Signal Processing - 716.3  Radio Systems and Equipment - 744.1  Lasers, General
Numerical data indexing:Percentage 1.00E+01%, Percentage 8.00E+01%
DOI:10.48550/arXiv.2302.08898
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.Preprint ID:2302.08898v1
Preprint source website:https://arxiv.org
Preprint ID type:ARXIV
 
 
<RECORD 151>
 
Accession number:20230813600620
Title:Research on the Key Technology of High Resolution Low-Light-Level Remote Sensing
Authors:Bai, Zhe (1); Ma, Yilong (1) 
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China 
Corresponding author:Ma, Yilong
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12557
Part number:1 of 1
Issue title:AOPC 2022: Optical Sensing, Imaging, and Display Technology
Issue date:2023
Publication year:2023
Article number:125571X
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510662285
Document type:Conference article (CA)
Conference name:2022 Applied Optics and Photonics China: Optical Sensing, Imaging, and Display Technology, AOPC 2022
Conference date:December 18, 2022  -  December 19, 2022
Conference location:Virtual, Online, China
Conference code:186412
Sponsor:Chinese Society for Optical Engineering (CSOE)
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">In recent years, besides higher spatial resolution, higher temporal resolution and higher spectral resolution, extending the effective working time of satellite platform based aerospace paid much attention. And Low-light-level(LLL) remote sensing technology in visible band is one of the ways to achieve the goal. LLL remote-sensing camera has become a novel subject for the development of aerospace optical remote-sensing payloads. In this manuscript, first the status quo and trend of LLL remote sensing technology is made a comprehensive introduction. After that, centering on the crucial technique to realize the low-light-level sensing, several different implementation ways are made a comparison both from the theoretical viewpoint and experiment demonstration. Finally, some advices are given on how to develop aerospace LLL remote sensing techniques based on the existing research results.<br/></div> &copy; 2023 SPIE.
Number of references:6
Main heading:Optical remote sensing
Uncontrolled terms:Dynamic range - EMCCD - High resolution - High spatial resolution - ICCD - Key technologies - Low light level - Remote sensing technology - Remote-sensing - SCMOS
Classification code:741.3  Optical Devices and Systems
DOI:10.1117/12.2651915
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 152>
 
Accession number:20224813193570
Title:Modified achromatic Savart polariscope for broadband spatially modulated snapshot imaging polarimeter
Authors:Quan, Naicheng (1); Li, Siyuan (1, 2); Zhang, Chunmin (2) 
Author affiliation:(1) School of Materials Science and Engineering, Chinese Academy of Sciences, Xi'an Institute of Optics and Precision Mechanics, Key Laboratory of Spectral Imaging Technology CAS, Xi'an University of Technology, Xi'an, China; (2) Xi'an Jiaotong University, Xi'an, China 
Corresponding author:Quan, Naicheng(quanncx@hotmail.com)
Source title:Optics and Lasers in Engineering
Abbreviated source title:Opt Lasers Eng
Volume:162
Issue date:March 2023
Publication year:2023
Article number:107398
Language:English
ISSN:01438166
CODEN:OLENDN
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">This paper presents the modified achromatic Savart Polariscope for constructing broadband spatially modulated snapshot imaging polarimeter. The modified achromatic Savart Polariscope can be made from two different birefringent crystals. The achievements and performances of the modified achromatic Savart Polariscope are demonstrated with numerical simulations. The chromatic variations in spatial carrier frequencies can be reduced by an order of magnitude. The spatially modulated snapshot imaging polarimeter constructed by the modified achromatic Savart Polariscopes can achieve the root mean square errors with a magnitude of 10<sup>&minus;4</sup> across the spectral range 0.48&ndash;0.96 &mu;m as it does in monochromatic light conditions.<br/></div> &copy; 2022 Elsevier Ltd
Number of references:17
Main heading:Mean square error
Controlled terms:Polarimeters
Uncontrolled terms:Birefringent crystals - Carrier frequency - Imaging Polarimeter - Orders of magnitude - Performance - Root mean square errors - Savart polariscope - Spatially modulated - Spatially modulation - Spectral range
Classification code:922.2  Mathematical Statistics - 941.3  Optical Instruments
Numerical data indexing:Size 4.80E-07m to 9.60E-07m
DOI:10.1016/j.optlaseng.2022.107398
Funding details:  Number: CXY-2021-121, Acronym: -, Sponsor: -;Number: 61805193, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2020M673448, Acronym: -, Sponsor: China Postdoctoral Science Foundation;Number: 2018440, Acronym: YIPA CAS, Sponsor: Youth Innovation Promotion Association of the Chinese Academy of Sciences;
Funding text:The authors thank the anonymous reviewers for their helpful comments and constructive suggestions. The work was supported by Youth Innovation Promotion Association of the Chinese Academy of Sciences ( 2018440 ), National Natural Science Foundation of China ( 61805193 ), China Postdoctoral Science Foundation ( 2020M673448 ) and Yulin Municipal Science and Technology Foundation (CXY-2021-121).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 153>
 
Accession number:20230713593009
Title:Multiple Attention Mechanism Enhanced YOLOX for Remote Sensing Object Detection    (Open Access)
Authors:Shen, Chao (1, 2); Ma, Caiwen (1); Gao, Wei (1) 
Author affiliation:(1) Xi&rsquo;an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi&rsquo;an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China 
Corresponding author:Ma, Caiwen(cwma@opt.ac.cn)
Source title:Sensors
Abbreviated source title:Sensors
Volume:23
Issue:3
Issue date:February 2023
Publication year:2023
Article number:1261
Language:English
ISSN:14248220
Document type:Journal article (JA)
Publisher:MDPI
Abstract:<div data-language="eng" data-ev-field="abstract">The object detection technologies of remote sensing are widely used in various fields, such as environmental monitoring, geological disaster investigation, urban planning, and military defense. However, the detection algorithms lack the robustness to detect tiny objects against complex backgrounds. In this paper, we propose a Multiple Attention Mechanism Enhanced YOLOX (MAME-YOLOX) algorithm to address the above problem. Firstly, the CBAM attention mechanism is introduced into the backbone of the YOLOX, so that the detection network can focus on the saliency information. Secondly, to identify the high-level semantic information and enhance the perception of local geometric feature information, the Swin Transformer is integrated into the YOLOX&rsquo;s neck module. Finally, instead of GIOU loss, CIoU loss is adopted to measure the bounding box regression loss, which can prevent the GIoU from degenerating into IoU. The experimental results of three publicly available remote sensing datasets, namely, AIBD, HRRSD, and DIOR, show that the algorithm proposed possesses better performance, both in relation to quantitative and qualitative aspects.<br/></div> &copy; 2023 by the authors.
Number of references:39
Main heading:Object detection
Controlled terms:Environmental technology - Object recognition - Remote sensing - Semantics
Uncontrolled terms:Attention mechanisms - CBAM - Detection technology - Environmental Monitoring - Geological disaster - Loss functions - Multiple attention - Objects detection - Remote-sensing - Swin transformer
Classification code:454  Environmental Engineering - 723.2  Data Processing and Image Processing
DOI:10.3390/s23031261
Funding details:  Number: -, Acronym: IMII, Sponsor: Institute of Infection and Immunity;Number: XDA15020604, Acronym: CAS, Sponsor: Chinese Academy of Sciences;
Funding text:This work was supported by the Strategic Priority Program on Space Science (III) Chinese Academy of Science (CAS) Program, grant number XDA15020604.
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold, Green
 
<RECORD 154>
 
Accession number:20232314196689
Title:X-ray transmission effects in a high-density dynamic-dusty plasma environment
Authors:Li, Yao (1); Yang, Zhiqiang (1); Zhang, Yingjun (2); Chen, Mingde (3); Xia, Fangyuan (2, 4, 5); Yang, Lihong (1); Zhang, Furui (1); Wu, Yinhua (1); Tan, Zhenkun (1); Yang, Chen (1); Su, Tong (3) 
Author affiliation:(1) College of Optoelectronic Engineering, Xi'an Technological University, Xi'an, China; (2) Xi'an Institute of Space Radio Technology, Xi'an, China; (3) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (4) Beijing Institute of Tracking and Telecommunication Technology, Beijing, China; (5) Beijing University of Posts and Telecommunication, Beijing, China 
Corresponding authors:Li, Yao(liyao_xatu@163.com); Su, Tong(sutong@opt.ac.cn)
Source title:Vacuum
Abbreviated source title:Vacuum
Volume:212
Issue date:June 2023
Publication year:2023
Article number:112260
Language:English
ISSN:0042207X
CODEN:VACUAV
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">X-ray communication (XCOM), which employs modulated X-ray photons as the carrier for signal transmission, is a promising wireless optical technology for space applications, particularly during spacecraft blackout re-entry. Currently, several challenges related to XCOM require solutions, including incomplete transmission attenuation models and a lack of experimental verification of the dynamic-dusty communication effects. This study improved the XCOM transmission characteristics in high-density dynamic-dusty plasma based on a collision model. A dynamic-dusty plasma XCOM was built to verify a modulated X-ray tube and an alkali-metal plasma source. The results show that with an increase in photon energy and flow, the X-ray carrier achieves a higher transmission speed, which is sharper than that of photon energy under the influence of flow. When the average electron density of the dusty plasma is 10<sup>12</sup>&ndash;10<sup>13</sup> cm<sup>&minus;2</sup>, the plasma flow speed is 550&ndash;650 m/s, the macro temperature exceeds 1500 K, and the communication demonstration system achieves a stable data rate of 50 kbps at a bit error (BER) of 1.7 &times; 10<sup>&minus;5</sup> with a carrier amplitude and frequency of approximately 20 kV and 4.8 Mcps, respectively. This experiment yielded theoretical and actual values for the development of XCOM technology in space applications during re-entry blackouts.<br/></div> &copy; 2023
Number of references:32
Main heading:Photons
Controlled terms:Bit error rate
Uncontrolled terms:Bit error ratios - Dusty plasmas - Dynamic-dusty plasma - Photon energy - Plasma environments - Pulse x-ray - Signal transmission - X-ray communication - X-ray transmission - X-rays photons
Classification code:723.1  Computer Programming - 931.3  Atomic and Molecular Physics
Numerical data indexing:Bit rate 5.00E+04bit/s, Size 1.30E-01m, Temperature 1.50E+03K, Velocity 5.50E+02m/s to 6.50E+02m/s, Voltage 2.00E+04V
DOI:10.1016/j.vacuum.2023.112260
Funding details:  Number: 21JY016, Acronym: -, Sponsor: -;Number: 12103039,62001363,62001364,62101420,62271483, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2020JQ-818,2021JM-432,2021JQ-640, Acronym: -, Sponsor: Natural Science Basic Research Program of Shaanxi Province;
Funding text:This study was supported by the National Natural Science Foundation of China (Grant No. 62001364 , No. 62001363 , No. 62101420 , No. 12103039 , and No. 62271483 ), the Natural Science Basic Research Program in Shaanxi Province, China (Grant No. 2020JQ-818 , No. 2021JQ-640 , and No. 2021JM-432 ), and the Key Scientific Research Program of Education Department of Shaanxi Province (Grant No. 21JY016 ).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 155>
 
Accession number:20230713582633
Title:High sensitivity Fabry-P&eacute;rot interferometric magnetic sensor based on Fe<inf>3</inf>O<inf>4</inf>-doped PDMS composite thin film
Authors:Wang, Xingfeng (1, 2); Yang, Jianfeng (1) 
Author affiliation:(1) Xi&rsquo;an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi&rsquo;an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 101408, China 
Source title:Applied Physics Express
Abbreviated source title:Appl. Phys. Express
Volume:16
Issue:2
Issue date:February 2023
Publication year:2023
Article number:026501
Language:English
ISSN:18820778
E-ISSN:18820786
Document type:Journal article (JA)
Publisher:Institute of Physics
Abstract:<div data-language="eng" data-ev-field="abstract">A magnetic field sensor based on Fabry-P&eacute;rot interferometer (FPI) with soft gold magnetic composite film (GMCF) is proposed and demonstrated experimentally. GMCF is fabricated by Fe<inf>3</inf>O<inf>4</inf>-doped polydimethylsiloxane (PDMS) film and adhered thin gold membrane via van der Waals force. Applying an external magnetic field, GMCF can vibrate under magnetic forces and cause a change in the cavity length of FPI and hence modulates the interference spectra. Experimental results indicate that the sensor can achieve maximum sensitivity of 390 pm mT<sup>&minus;1</sup> under a linear magnetic field intensity ranging from 0 to 65 mT. The proposed sensor could help with magnetic field detection in complex environments.<br/></div> &copy; 2023 The Japan Society of Applied Physics.
Number of references:28
Main heading:Magnetite
Controlled terms:Composite films - Fabry-Perot interferometers - Fiber optic sensors - Gold - Magnetic field measurement - Magnetic fields - Magnetic sensors - Microchannels - Polydimethylsiloxane - Silicones  - Thin films - Van der Waals forces
Uncontrolled terms:Composite thin films - Fabry-Perot - Fibre-optic sensor - High sensitivity - Interferometrics - Magnetic composites - Magnetic fields measurements - Magnetic fields sensors - Soft gold magnetic composite film - Van der waals' forces
Classification code:547.1  Precious Metals - 701.2  Magnetism: Basic Concepts and Phenomena - 741.1.2  Fiber Optics - 801.4  Physical Chemistry - 815.1.1  Organic Polymers - 931.3  Atomic and Molecular Physics - 941.3  Optical Instruments - 942.4  Magnetic Variables Measurements
Numerical data indexing:Magnetic flux density 0.00E00T to 6.50E-02T, Size 3.90E-10m
DOI:10.35848/1882-0786/acb3af
Funding details:  Number: XDA15320102, Acronym: CAS, Sponsor: Chinese Academy of Sciences;
Funding text:This work was supported by the Strategic Priority Research Program of the Chinese Academy of Sciences (XDA15320102).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 156>
 
Accession number:20232114126750
Title:Optical passive athermalization design of a catadioptric infrared optical system with large aperture and long focal length
Authors:Cui, Wen (1, 2); Yan, Aqi (1); Mei, Chao (1); Chen, Weining (1) 
Author affiliation:(1) Xi&rsquo;an Institute Optics and Precision Mechanics, Chinese Academ of Sciences, Shaanxi, Xi&rsquo;an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China 
Corresponding author:Yan, Aqi(yanaqi@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12565
Part number:1 of 1
Issue title:Conference on Infrared, Millimeter, Terahertz Waves and Applications, IMT 2022
Issue date:2023
Publication year:2023
Article number:1256505
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510662476
Document type:Conference article (CA)
Conference name:2022 Conference on Infrared, Millimeter, Terahertz Waves and Applications, IMT 2022
Conference date:September 20, 2022  -  September 22, 2022
Conference location:Xi'an, China
Conference code:188255
Sponsor:Chinese Society for Optical Engineering (CSOE)
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">In view of the problem that the imaging quality of the large-aperture and long-focal length infrared optical system is sensitive to temperature changes.In this paper, we propose an idea of combining athermalization design with catadioptric optical system, and a large-aperture long-focal length catadioptric infrared optical system is designed by this idea.According to the influence of each parameter by environmental changes, the system optical power is allocated reasonably.Select the appropriate infrared lens material and reflector base material for the system so that the image plane deviation caused by the environmental changes of the components cancel each other out.The design method and idea proposed in this paper have important reference value for the realization of heat dissipation of catadioptric optical system.The working band of the system is 8~14&mu;&#8575;, the focal length is 250&#8575;&#8575;, F-number is 1, and the three infrared materials used in the system are HWS2, HWS9 and IRG22.The design results show that the system can maintain high imaging quality in the temperature range of -40&#8451;~+60&#8451;, with the modulation transfer function(MTF)curves close to the diffraction limit at the cutoff frequency.The design methods and ideas proposed in this paper have significant reference value for realizing athermalization of catadioptric optical systems.<br/></div> &copy; 2023 SPIE.
Number of references:11
Main heading:Optical systems
Controlled terms:Cutoff frequency - Design - Diffraction - Infrared radiation - Optical transfer function
Uncontrolled terms:Catadioptirc - Catadioptrics - Infrared optical systems - Large aperture - LWIR - Optical passive athermalization - Optical system designs - Optical- - Passive athermalization - Uncooled
Classification code:741.1  Light/Optics - 741.3  Optical Devices and Systems
DOI:10.1117/12.2661520
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 157>
 
Accession number:20230813609899
Title:Detection method of sidelobe peaks parameter for far-field measurement based on the diffraction inversion of sidelobe beam
Title of translation:&#22522;&#20110;&#26049;&#29923;&#20809;&#26463;&#34893;&#23556;&#21453;&#28436;&#30340;&#36828;&#22330;&#27979;&#37327;&#26049;&#29923;&#27874;&#23792;&#21442;&#25968;&#26816;&#27979;&#26041;&#27861;
Authors:Wang, Zhengzhou (1); Duan, Yaxuan (1); Wang, Li (1); Li, Gang (1); Guo, Jiafu (1, 2) 
Author affiliation:(1) Xi&rsquo;an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi&rsquo;an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China 
Corresponding author:Duan, Yaxuan
Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering
Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.
Volume:52
Issue:1
Issue date:January 2023
Publication year:2023
Article number:20220281
Language:Chinese
ISSN:10072276
Document type:Journal article (JA)
Publisher:Chinese Society of Astronautics
Abstract:<div data-language="eng" data-ev-field="abstract">In order to solve the problem that high power laser far-field measurement can not effectively identify the parameters of each sidelobe peak in any direction of sidelobe beam, a detection method of sidelobe peak parameters of far-field measurement based on sidelobe beam diffraction inversion is proposed in this paper. The main idea is to quantify the sidelobe beam image according to a specific angle sampling interval, and convert the two-dimensional sidelobe beam image into a set of one-dimensional sidelobe beam curves in all directions by angle transformation, then detect the parameters of each sidelobe peak of one-dimensional sidelobe beam curve at each angle, so as to obtain the parameters of each sidelobe peak in any direction of sidelobe beam. The main optimization measures are as follows: (1) Convert the two-dimensional sidelobe beam image into a set of one-dimensional sidelobe beam curves in all directions by angle transformation; (2) Detect the parameters of each sidelobe peak of one-dimensional sidelobe beam curve at each angle, count each sidelobe peak in all directions, and generate the maximum rings of each sidelobe peak; (3) Count the gray mean values of the maximum rings of each sidelobe peak, compare the gray mean values of the maximum rings of each sidelobe peak with the background noise, and select the minimum peak mean value greater than 1.5 times the background noise as the minimum measurable sidelobe peak signal of the whole sidelobe beam. The experimental results show that this method can effectively detect the parameters of each sidelobe peak in any direction of the sidelobe beam. The error between the mean value of gray maximum value and the theoretical value of gray maximum value in any direction is 0.477, and the error between the mean value of the maximum ring radius and the radius of the theoretical value of 5 sidelobe peaks is less than 1 pixel. This method improves the experimental accuracy and reliability of far-field measurement of high power laser based on the diffraction inversion of sidelobe beam, and it will lay a foundation for the accurate measurement of the far field of the high power laser in the large scientific facility in the future.<br/></div> &copy; 2023 Chinese Society of Astronautics. All rights reserved.
Number of references:19
Main heading:High power lasers
Controlled terms:Curve fitting - Diffraction - Parameter estimation
Uncontrolled terms:Angle transformation - Diffraction inversion of sidelobe beam - Far field measurement - Mean values - One-dimensional - Parameter detection - Parameter detection of sidelobe peak - Schlieren method - Side lobes
Classification code:744.1  Lasers, General - 921.6  Numerical Methods
DOI:10.3788/IRLA20220281
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 158>
 
Accession number:20220511582672
Title:Feature spatial pyramid network for low-light image enhancement
Authors:Song, Xijuan (1, 2); Huang, Jijiang (1); Cao, Jianzhong (1); Song, Dawei (1, 2) 
Author affiliation:(1) Xi&rsquo;an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi&rsquo;an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China 
Corresponding author:Huang, Jijiang(huangjijiang@opt.ac.cn)
Source title:Visual Computer
Abbreviated source title:Visual Comput
Volume:39
Issue:1
Issue date:January 2023
Publication year:2023
Pages:489-499
Language:English
ISSN:01782789
CODEN:VICOE5
Document type:Journal article (JA)
Publisher:Springer Science and Business Media Deutschland GmbH
Abstract:<div data-language="eng" data-ev-field="abstract">Low-light images usually contain high noise and low contrast. This brings bad visual feelings and hinders subsequent computer vision work. At present, many algorithms have been proposed to enhance low-light images. However, the existing methods still have some problems, such as insufficient enhancement, color distortion, or overexposure. In this paper, we propose a low-light image enhancement network based on the spatial pyramid to solve the problems existing in other methods, so as to make the enhancement result closer to the normal illumination image in brightness and color. The network is divided into two parts. Firstly, the decomposition network is designed based on Retinex theory, and the image is decomposed into the illumination image and reflection image. Then, the illumination image is processed through the three convolution kernels on the spatial pyramid module to obtain three sets of features with different scales. Next, we concatenate these three groups of features together. And the concatenated features are extracted through a convolution kernel to obtain the enhanced illumination image. Finally, the enhanced illumination image and the decomposed reflection image are multiplied pixel by pixel to obtain an enhanced image. In addition, we introduce a color loss function to solve the problem of color distortion. The experimental results show that the proposed algorithm has better visual feelings than other algorithms. We also calculate the peak signal-to-noise ratio, structural similarity index and average brightness of the enhanced results of different algorithms, and the results show that the proposed algorithm performs better.<br/></div> &copy; 2022, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.
Number of references:48
Main heading:Image enhancement
Controlled terms:Color - Convolution - Light reflection - Luminance - Pixels - Signal to noise ratio
Uncontrolled terms:Color distortions - Color loss - Convolution kernel - Feature spatial pyramid network - Illumination images - Low-light image enhancement - Low-light images - Pyramid network - Reflection image - Spatial pyramids
Classification code:716.1  Information Theory and Signal Processing - 741.1  Light/Optics
DOI:10.1007/s00371-021-02343-8
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 159>
 
Accession number:20232614323484
Title:Measurement of underwater camera imaging resolution using underwater collimator
Title of translation:&#21033;&#29992;&#27700;&#19979;&#24179;&#34892;&#20809;&#31649;&#27979;&#37327;&#27700;&#19979;&#30456;&#26426;&#25104;&#20687;&#20998;&#36776;&#29575;
Authors:Ding, Zhe (1, 2); Wu, Guojun (1, 2); Wu, Yafeng (1); Feng, Fei (1, 2); Liu, Bo (1) 
Author affiliation:(1) Xi&rsquo;an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi&rsquo;an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China 
Corresponding author:Wu, Guojun
Source title:Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering
Abbreviated source title:Hongwai yu Jiguang Gongcheng Infrared Laser Eng.
Volume:52
Issue:2
Issue date:February 2023
Publication year:2023
Article number:20220397
Language:Chinese
ISSN:10072276
Document type:Journal article (JA)
Publisher:Chinese Society of Astronautics
Abstract:<div data-language="eng" data-ev-field="abstract">Underwater optical imaging is an important underwater measurement method. The existing underwater camera imaging resolution measurement method is affected by the water body and the measurement method, and it is difficult to accurately measure the imaging resolution. The underwater camera imaging resolution measurement technology based on an underwater collimator is proposed to directly measure the underwater camera imaging resolution by generating parallel light beams in the water. Through simulation, the modulation transfer function (MTF) of the underwater collimator in visible light in water and single wavelength in the air are basically the same. In conclusion, a method for adjusting the underwater collimator in the air is proposed. The experimental test is carried out for an underwater camera developed in the laboratory, and its resolution under the condition of visible light in water and a 635 nm light source in the air is the same. The experimental results show that the proposed underwater camera imaging resolution measurement method based on the underwater collimator can effectively eliminate the influence of water on the measurement and realize the accurate measurement of the underwater camera imaging resolution.<br/></div> &copy; 2023 Chinese Society of Astronautics. All rights reserved.
Number of references:21
Main heading:Underwater cameras
Controlled terms:Aberrations - Light sources
Uncontrolled terms:Chromatic aberration - Imaging resolutions - Measurement methods - Measurements of - Optical imaging - Resolution measurements - Underwater collimator - Underwater optic - Visible light - Waterbodies
Classification code:742.2  Photographic Equipment
Numerical data indexing:Size 6.35E-07m
DOI:10.3788/IRLA20220397
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 160>
 
Accession number:20231613942131
Title:CSMOT: Make One-Shot Multi-Object Tracking in Crowded Scenes Great Again &dagger;    (Open Access)
Authors:Hou, Haoxiong (1, 2); Shen, Chao (1, 2); Zhang, Ximing (1); Gao, Wei (1) 
Author affiliation:(1) Xi&rsquo;an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi&rsquo;an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 101408, China 
Corresponding authors:Zhang, Ximing(zhangximing@opt.ac.cn); Gao, Wei(gaowei@opt.ac.cn)
Source title:Sensors
Abbreviated source title:Sensors
Volume:23
Issue:7
Issue date:April 2023
Publication year:2023
Article number:3782
Language:English
ISSN:14248220
Document type:Journal article (JA)
Publisher:MDPI
Abstract:<div data-language="eng" data-ev-field="abstract">The current popular one-shot multi-object tracking (MOT) algorithms are dominated by the joint detection and embedding paradigm, which have high inference speeds and accuracy, but their tracking performance is unstable in crowded scenes. Not only does the detection branch have difficulty in obtaining the accurate object position, but the ambiguous appearance of features extracted by the re-identification (re-ID) branch also leads to identity switches. Focusing on the above problems, this paper proposes a more robust MOT algorithm, named CSMOT, based on FairMOT. First, on the basis of the encoder&ndash;decoder network, a coordinate attention module is designed to enhance the information interaction between channels (horizontal and vertical coordinates), which improves its object-detection abilities. Then, an angle-center loss that effectively maximizes intra-class similarity is proposed to optimize the re-ID branch, and the extracted re-ID features are made more discriminative. We further redesign the re-ID feature dimension to balance the detection and re-ID tasks. Finally, a simple and effective data association mechanism is introduced, which associates each detection instead of just the high-score detections during the tracking process. The experimental results show that our one-shot MOT algorithm achieves excellent tracking performance on multiple public datasets and can be effectively applied to crowded scenes. In particular, CSMOT decreases the number of ID switches by 11.8% and 33.8% on the MOT16 and MOT17 test datasets, respectively, compared to the baseline.<br/></div> &copy; 2023 by the authors.
Number of references:45
Main heading:Object detection
Controlled terms:Channel coding - Feature extraction - Inference engines - Object recognition
Uncontrolled terms:'current - Angle-center loss - Coordinate attention - Data association - Joint-detection - Multi-object tracking - Object tracking algorithm - One-shot - Re identifications - Tracking performance
Classification code:716.1  Information Theory and Signal Processing - 722.3  Data Communication, Equipment and Techniques - 723.2  Data Processing and Image Processing - 723.4.1  Expert Systems
Numerical data indexing:Percentage 1.18E+01%, Percentage 3.38E+01%
DOI:10.3390/s23073782
Funding text:This work was supported by the Development of Image Processor Test Systems program, grant number E19041WC01.
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold, Green
 
<RECORD 161>
 
Accession number:20232614316029
Title:A Middleware-Based Approach for Latency-Sensitive Service Provisioning in IoT with End-Edge Cooperation
Authors:Sun, Canlong (1); Li, Ting (1); Wu, Zihao (1); Li, Cong (2) 
Author affiliation:(1) The 705 Research Institute of China State Shipbuilding Corporation Limited, Yunnan, Kunming, China; (2) Xi&rsquo;an Institute of Optics and Precision Mechanics, CAS, Shanxi, Xian, China 
Corresponding author:Sun, Canlong(362028257@qq.com)
Source title:Lecture Notes of the Institute for Computer Sciences, Social-Informatics and Telecommunications Engineering, LNICST
Abbreviated source title:Lect. Notes Inst. Comput. Sci. Soc. Informatics Telecommun. Eng.
Volume:507 LNICST
Part number:1 of 1
Issue title:Mobile Wireless Middleware, Operating Systems and Applications - 11th EAI International Conference, MOBILWARE 2022, Proceedings
Issue date:2023
Publication year:2023
Pages:3-12
Language:English
ISSN:18678211
E-ISSN:1867822X
ISBN-13:9783031344961
Document type:Conference article (CA)
Conference name:11th EAI International Conference on MOBILe Wireless MiddleWARE, Operating Systems and Applications, MOBILWARE 2022
Conference date:December 28, 2022  -  December 29, 2022
Conference location:Virtual, Online
Conference code:295419
Publisher:Springer Science and Business Media Deutschland GmbH
Abstract:<div data-language="eng" data-ev-field="abstract">As modern mobile applications have become more and more complex, mobile edge computing brings IT services and computing resources to the edge of mobile networks to full fill various computing and application requirements. Considering that mobile devices may not always have adequate hardware conditions, computation offloading, which can help devices take full advantage of extra computing resources, has reached a broad audience in the edge environments. However, due to the limited storage space of edge servers, it is very difficult to manage services in middleware. Therefore, in the edge computing environment, how to deal with a large amount of data from different edge nodes in the middleware is very important. In this paper, we regard an approach about improving quality of sensitive data for middleware on edge environments. We have evaluated our approaches on a real-world environment. The results demonstrate that our approach can effectively reduce the response time.<br/></div> &copy; 2023, ICST Institute for Computer Sciences, Social Informatics and Telecommunications Engineering.
Number of references:18
Main heading:Middleware
Controlled terms:Computation offloading - Digital storage - Internet of things - Mobile edge computing - Mobile telecommunication systems - Sensitive data
Uncontrolled terms:Application requirements - Computing resource - Condition - Edge computing - IoT - IT services - Latency-sensitive service - Mobile applications - Service provisioning - Service resources
Classification code:722.1  Data Storage, Equipment and Techniques - 722.3  Data Communication, Equipment and Techniques - 722.4  Digital Computers and Systems - 723  Computer Software, Data Handling and Applications - 723.1  Computer Programming - 723.2  Data Processing and Image Processing
DOI:10.1007/978-3-031-34497-8_1
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 162>
 
Accession number:20231013686176
Title:High-precision pose measurement method based on binocular vision in dark lighting environments
Authors:Wang, Feng (1); Zhang, Haifeng (1); Zhang, Gaopeng (1); Shan, Fuqiang (1, 2); Ren, Long (1); Ai, Han (1, 2); Cao, Jianzhong (1) 
Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics of CAS, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China 
Corresponding author:Zhang, Haifeng(zhanghf@opt.ac.cn)
Source title:Optical Engineering
Abbreviated source title:Opt Eng
Volume:62
Issue:2
Issue date:February 1, 2023
Publication year:2023
Article number:024105
Language:English
ISSN:00913286
E-ISSN:15602303
CODEN:OPEGAR
Document type:Journal article (JA)
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">Measuring the pose of non-cooperative targets in space is a critical supporting technology for cleaning up space debris and recovering items. However, most existing methods are simulation experiments conducted in good lighting environments and tend to show poor performance in dark lighting environments. A target pose measurement method based on binocular vision is proposed, which is suitable for dark lighting environments. First, the traditional features from accelerated segment test algorithm are improved to reduce the influence of illumination on the performance of feature point extraction under various postures. The point feature and line feature are combined to extract image features more easily in a dark lighting environment while retaining the high accuracy of the pose measurement algorithm based on point features. Second, the normalized cross-correlation coefficient matching method is combined with the epipolar constraint to narrow the search range of the matching points from the two-dimensional plane to the epipolar line, which substantially improves the matching efficiency and accuracy of the matching algorithm. Finally, post-processing through feature matching is performed to reduce the probability of mismatches. Simulation and physical experiment results show that our method can stably extract features and obtain high-precision target pose information in well-illuminated as well as dark lighting environments, making it suitable for high-precision target pose measurement under insufficient illumination.<br/></div> &copy; 2023 Society of Photo-Optical Instrumentation Engineers (SPIE).
Number of references:28
Main heading:Computer vision
Controlled terms:Binocular vision - Lighting - Space debris
Uncontrolled terms:Dark lighting environment - High-precision - Lighting environment - Machine-vision - Measurement methods - Non-cooperative target - Point features - Pose measurement - Space non-cooperative target - Supporting technology
Classification code:656.1  Space Flight - 723.5  Computer Applications - 741.2  Vision
DOI:10.1117/1.OE.62.2.024105
Funding details:  Number: 51905529, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2022410, Acronym: YIPA CAS, Sponsor: Youth Innovation Promotion Association of the Chinese Academy of Sciences;
Funding text:This work is supported by the National Natural Science Foundation of China (NSFC) (Grant No. 51905529) and Youth Innovation Promotion Association, CAS (Grant No. 2022410). The authors are grateful to the anonymous reviewers for their valuable comments. We would like to thank Wordvice for English language editing. The authors declare that there are no conflicts of interest related to this article.
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 163>
 
Accession number:20232114139908
Title:FBLSTM: A Filter-Bank LSTM-based Deep Learning Method for MI-EEG Classification
Authors:Gui, Yawei (1, 2, 3); Tian, Ziwei (1, 2, 3); Liu, Xi (1, 2, 3); Hu, Bingliang (1, 3); Wang, Quan (1, 3) 
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China; (3) Key Laboratory of Biomedical Spectroscopy of Xi'an, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China 
Corresponding author:Wang, Quan(wangquan@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12615
Part number:1 of 1
Issue title:International Conference on Signal Processing and Communication Technology, SPCT 2022
Issue date:2023
Publication year:2023
Article number:126151W
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510664333
Document type:Conference article (CA)
Conference name:2022 International Conference on Signal Processing and Communication Technology, SPCT 2022
Conference date:December 23, 2022  -  December 25, 2022
Conference location:Harbin, China
Conference code:188140
Sponsor:Academic Exchange Information Centre (AEIC); Greater Noida Institute of Technology (GNIOT)
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">Motor imagery electroencephalogram (MI-EEG) classification is a vital task for brain computer interface (BCI) system. But the classification accuracy is not satisfactory, which hinders its generalizability. This study proposes a Filter-Bank Long Short-Term Memory (LSTM) Network (FBLSTM), which adopts a series of band-pass filters to obtain the different frequency information in EEG signals, and a convolution neural network to obtain spatial information. Moreover, a LSTM with attention mechanism is employed to process time series information. The open BCI Competition IV dataset 2a is applied to validate the performance of the proposed FBLSTM. Compared with recent methods, our method shows advantages on the within-subject and cross-subject 4-class classification performance and outperformed existing models, achieving an average accuracy of 72.4% and 53.6%, respectively.<br/></div> &copy; 2023 SPIE.
Number of references:17
Main heading:Electroencephalography
Controlled terms:Brain - Brain computer interface - Filter banks - Learning systems - Long short-term memory
Uncontrolled terms:Attention mechanisms - Brain computer interface - Classification accuracy - Filters bank - Interface system - Learning methods - Long short-term memory - Memory network - Motor imagery - Motor imagery electroencephalogram
Classification code:461.1  Biomedical Engineering - 461.6  Medicine and Pharmacology - 703.2  Electric Filters - 722.2  Computer Peripheral Equipment
Numerical data indexing:Percentage 5.36E+01%, Percentage 7.24E+01%
DOI:10.1117/12.2673936
Funding details:  Number: 201805050ZD1CG34,29J20- 052-III,29J20-015-III, Acronym: -, Sponsor: -;Number: 54S18-014, Acronym: CAS, Sponsor: Chinese Academy of Sciences;
Funding text:The research was supported by the Key Laboratory of Spectral Imaging Technology, Xi'an Institute of Optics and Precision Mechanics of the Chinese Academy of Sciences (54S18-014), the Key Laboratory of Biomedical Spectroscopy of Xi'an (201805050ZD1CG34), the Outstanding Award for Talent Project of the Chinese Academy of Sciences (29J20- 052-III), "From 0 to 1" Original Innovation Project of the Basic Frontier Scientific Research Program of the Chinese Academy of Sciences (29J20-015-III).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 164>
 
Accession number:20232114127134
Title:Lightweight design of all-aluminum Cassegrain laser receiving system structure
Authors:Yu, Wanrong (1, 2); Yang, Hongtao (1); Chen, Weining (1); Peng, Jianwei (1) 
Author affiliation:(1) Xi&rsquo;an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shaanxi, Xi&rsquo;an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China 
Corresponding author:Yang, Hongtao(yanght@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12565
Part number:1 of 1
Issue title:Conference on Infrared, Millimeter, Terahertz Waves and Applications, IMT 2022
Issue date:2023
Publication year:2023
Article number:125651P
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510662476
Document type:Conference article (CA)
Conference name:2022 Conference on Infrared, Millimeter, Terahertz Waves and Applications, IMT 2022
Conference date:September 20, 2022  -  September 22, 2022
Conference location:Xi'an, China
Conference code:188255
Sponsor:Chinese Society for Optical Engineering (CSOE)
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">In order to meet the design requirements of more compact and portable laser detection system, the parameters optimization design of lightweight structure is carried out for the receiving system with large quality proportion. Firstly, based on the index requirements of the system for performance and structure, the scheme of Cassegrain optical receiving system is selected, and it is clear that the receiving system is an all-aluminum card mechanical structure. Then, through the numerical analysis of the mode and static force of the receiving lens, the main reflector is selected as the optimization object. After that then the multi wheel topology optimization design is carried out by using the finite element analysis method, and the dynamic simulation analysis of the whole receiving system is carried out. Finally, it is determined that the lightweight hole form of the back opening of the main reflector is fan-shaped, the thickness is 4mm, and the weight loss rate is 31.4%. Under certain vibration and impact environment conditions, the system structure still has good stability. According to the design and optimization results, the processing and assembly of the lens are completed. Through alignment test and surface inspection, the PV value of the main reflector is 2.293&lambda;, and the RMS is0.509&lambda; (&lambda;=1064nm). Both of them meet the requirements of optical design. It shows that the accuracy of the main reflector surface improved by top<sup>1</sup>ology optimization can meet the application requirements. which has a certain reference significance for the structural design in the field of aircraft laser ranging.<br/></div> &copy; 2023 SPIE.
Number of references:12
Main heading:Optical systems
Controlled terms:Optical design - Reflection - Shape optimization - Structural design - Structural optimization - Topology
Uncontrolled terms:Cassegrain - Cassegrain optical system - Laser reception - Main reflectors - Optimisations - Optimization design - Receiving system - Simulation analysis - Systems Structure - Topology optimisation
Classification code:408.1  Structural Design, General - 741.1  Light/Optics - 741.3  Optical Devices and Systems - 921.4  Combinatorial Mathematics, Includes Graph Theory, Set Theory - 921.5  Optimization Techniques
Numerical data indexing:Percentage 3.14E+01%, Size 1.064E-06m, Size 4.00E-03m
DOI:10.1117/12.2662478
Funding details:  Number: 51905529, Acronym: -, Sponsor: -;
Funding text:This work was supported by the National Youth Natural Science Fund Project (Grant No.51905529). The authors
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 165>
 
Accession number:20230713583784
Title:Dynamic space&ndash;time dark level correction approach for lunar radiometric calibration of the Lunar Observation Imaging Spectrometer    (Open Access)
Authors:An, Lingping (1, 2); Wang, Yihao (1, 2); Zhao, Hang (1, 2); Yu, Can (1, 2); Wang, Yanheng (1, 2); Wang, Shuang (1); Liu, Xuebin (1) 
Author affiliation:(1) Xi&rsquo;an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shaanxi, Xi&rsquo;an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China 
Corresponding author:Wang, Shuang(wangshuang@opt.ac.cn)
Source title:Applied Optics
Abbreviated source title:Appl. Opt.
Volume:62
Issue:5
Issue date:February 10, 2023
Publication year:2023
Pages:1193-1199
Language:English
ISSN:1559128X
E-ISSN:21553165
CODEN:APOPAI
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">Lunar radiometric calibration is used to solve the problem of consistent radiometric calibration for multiple satellite platforms and remote sensors. However, the dark level fluctuates when observing the Moon with a shortwave infrared spectrometer, which seriously affects the accuracy of lunar radiation data. In this work, we propose a dynamic space&ndash;time dark level correction approach to address the fluctuation of the dark level. This method employs cold space signals in space and time dimensions to estimate the dark level for each frame individually and to reduce errors due to environmental variations. Experiments on lunar observations at multiple phase angles were conducted, and the dark level correction results demonstrate that our proposed method is effective even in the short-wave infrared, and is also superior to currently existing techniques. For a single-band (1700 nm) image of the full Moon, the mean background proportion of the proposed method is 1.00%, which is better than that of the static dark correction method (2.25%) and linear dark correction method (5.93%).<br/></div> &copy; 2023 Optica Publishing Group.
Number of references:27
Main heading:Calibration
Controlled terms:Infrared radiation - Moon - Radiometers - Radiometry - Remote sensing - Spectrometers
Uncontrolled terms:Correction approaches - Correction method - Imaging spectrometers - Lunar observations - Multiple satellites - Platform sensors - Radiometric calibrations - Satellite platforms - Short wave infrared - Spacetime
Classification code:657.2  Extraterrestrial Physics and Stellar Phenomena - 741.1  Light/Optics - 741.3  Optical Devices and Systems - 944.7  Radiation Measuring Instruments - 944.8  Radiation Measurements
Numerical data indexing:Percentage 1.00E00%, Percentage 2.25E+00%, Percentage 5.93E+00%, Size 1.70E-06m
DOI:10.1364/AO.476640
Funding details:  Number: 2018YFB0504900, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;
Funding text:Funding. National Key Research and Development Program of China (2018YFB0504900).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Green
 
<RECORD 166>
 
Accession number:20230613537988
Title:Research on assembly and rectification method of complex offset axis infrared diffraction camera
Authors:Cao, Ming Qiang (1); Liu, Jun Peng (1); Xu, Hong Lao (1); Kang, Shi Fa (1); Fu, Xing (1); Qin, Xing (1); Shen, Zhong (1) 
Author affiliation:(1) Xi'an Institute of Optics and Precision Machinery, CAS, No.17, Xinxi Avenue, High-tech Zone, Shaanxi Province, Xi'an City, China 
Corresponding author:Cao, Ming Qiang(caomingqiang@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12507
Part number:1 of 1
Issue title:Advanced Optical Manufacturing Technologies and Applications 2022; and 2nd International Forum of Young Scientists on Advanced Optical Manufacturing, AOMTA and YSAOM 2022
Issue date:2023
Publication year:2023
Article number:125072Q
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510661264
Document type:Conference article (CA)
Conference name:Advanced Optical Manufacturing Technologies and Applications 2022, AOMTA 2022 and 2nd International Forum of Young Scientists on Advanced Optical Manufacturing, YSAOM 2022
Conference date:July 29, 2022  -  July 31, 2022
Conference location:Changchun, China
Conference code:186036
Sponsor:Changchun Institute of Optics, Fine Mechanics and Physics, CAS; Changchun University of Science and Technology; Changchun University of Technology; et al.; Jilin University; University of Shanghai for Science and Technology
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">In this paper, the assembly and rectification method of the new optical system is studied. According to the characteristics and difficulties of the diffraction camera, the assembly and rectification scheme is formulated. Firstly, the space angle of the mirror is determined by the spatial attitude measurement and the reference conversion matrix method. The coaxial adjustment and combined detection and adjustment of each transmission lens group are completed by the self alignment method. The method of sensitivity matrix iterative fine adjustment based on aberration is applied in the whole machine assembly and adjustment process. Finally, the high-precision assembly and detection of the complex offset axis infrared diffraction camera were completed, and the wave aberration on the axis reached 0.119&lambda;@3.39&mu;m. The MTF reached 0.13@33lp/mm, meeting the design requirements. This method provides engineering experience and reference for similar camera assembly and adjustment process methods.<br/></div> &copy; 2023 SPIE.
Number of references:6
Main heading:Diffraction
Controlled terms:Cameras - Iterative methods - Linear transformations - Optical systems
Uncontrolled terms:Assembly and rectification - Attitude measurement - Conversion matrix - Coordinate transformations - Diffraction camera - Matrix methods - Method of complex - Offset-axes - Rectification - Sensitivity matrix
Classification code:741.3  Optical Devices and Systems - 742.2  Photographic Equipment - 921.3  Mathematical Transformations - 921.6  Numerical Methods
Numerical data indexing:Size 3.39E-06m
DOI:10.1117/12.2656677
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 167>
 
Accession number:20231513865966
Title:Research on precision alignment method of a five-mirror optical derotator system
Authors:Lei, Yu (1, 2); Xu, Songbo (1); Cao, Mingqiang (1); Ma, Caiwen (1, 2); Duan, Zhanjun (1); Fu, Xing (1); Li, Hua (1); Kang, Shifa (1) 
Author affiliation:(1) Xi'An Institute of Optics and Precision Mechanics, Alignment Technology Center, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China 
Corresponding author:Xu, Songbo(xusongbo@opt.ac.cn)
Source title:Journal of Astronomical Telescopes, Instruments, and Systems
Abbreviated source title:J. Astron. Telesc. Instrum. Syst.
Volume:9
Issue:1
Issue date:January 1, 2023
Publication year:2023
Report number:22102G
Pages:14004
Language:English
ISSN:23294124
E-ISSN:23294221
Document type:Journal article (JA)
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">A five-mirror optical derotator system is used in the Accurate Infrared Magnetic System solar telescope by virtue of its polarization-free and superior real-Time performance. The derotator system can compensate image rotation during tracking observation. The system consists of five flat mirrors with their normal vectors noncoplanar. Due to the complicated spatial positions of mirrors, it is challenging to align the system with high accuracy. We analyze parallelism and concentricity characteristic of derotator system by matrix transformation and propose a compensation alignment method from multivariables perturbation simulation. This method reduces degrees of freedom for alignment from 10 to 4, which greatly simplifies the installation and adjustment process. Based on the above simulation, the alignment experiment has been conducted successfully with the parallelism and concentricity meeting the requirements. Through theoretical analysis and experimental verification, the proposed method is reasonable and provides an efficient alignment solution for this kind of five-mirror optical derotator system.<br/></div> &copy; 2023 Society of Photo-Optical Instrumentation Engineers (SPIE).
Number of references:16
Main heading:Mirrors
Controlled terms:Alignment - Degrees of freedom (mechanics) - Linear transformations - Perturbation techniques
Uncontrolled terms:Alignment methods - Concentricity - Five-mirror optical derotator - Magnetic system - Matrix transformation - Optical- - Parallelism - Precision alignment - Real time performance - Solar telescope
Classification code:601.1  Mechanical Devices - 741.3  Optical Devices and Systems - 921  Mathematics - 921.3  Mathematical Transformations - 931.1  Mechanics
DOI:10.1117/1.JATIS.9.1.014004
Funding details:  Number: 2019KW-060,2019KWZ-06, Acronym: -, Sponsor: -;Number: 2018GHJD-23, Acronym: -, Sponsor: -;Number: NSFC 11427901,NSFC 11703072, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:The project was funded by the National Natural Science Foundation of China (Grant Nos. NSFC 11703072 and NSFC 11427901), the Scientific and Technological Development Plan (Grant Nos. 2019KWZ-06 and 2019KW-060) of Shaanxi province, China, and Shaanxi Province Innovation Capacity Support Program (Grant No. 2018GHJD-23). The authors declare no conflicts of interest.
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 168>
 
Accession number:20232014101757
Title:Nonlinear image translation using adaptive rectifier with structure adaption
Authors:Zhang, Yipeng (1, 2, 3); Hu, Bingliang (1, 2); Ning, Hailong (4, 5, 6); Wang, Quan (1, 2) 
Author affiliation:(1) Chinese Academy of Sciences, Xi'an Institute of Optics and Precision Mechanics, Key Laboratory of Spectral Imaging Technology Cas, Xi'an, China; (2) The Key Laboratory of Biomedical Spectroscopy of Xi'an, Xi'an, China; (3) University of Chinese Academy of Sciences, Beijing, China; (4) Xi'an University of Posts and Telecommunications, Xi'an, China; (5) Shaanxi Key Laboratory of Network Data Analysis and Intelligent Processing, Xi'an, China; (6) Xi'an Key Laboratory of Big Data and Intelligent Computing, Xi'an, China 
Corresponding author:Wang, Quan(wangquan@opt.ac.cn)
Source title:Journal of Electronic Imaging
Abbreviated source title:J. Electron. Imaging
Volume:32
Issue:2
Issue date:March 1, 2023
Publication year:2023
Article number:023007
Language:English
ISSN:10179909
E-ISSN:1560229X
CODEN:JEIME5
Document type:Journal article (JA)
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">When an image translation task contains intradomain translations, the untranslated source image will be discriminated as the real by the discriminator. Thus if the network's nonlinearity is insufficient, the generator can fool the discriminator by producing output that resembles the source image. We propose an activation function termed "adaptive rectified linear unit (ReLU) with structure adaption (SA-AdaReLU)"to enhance the control and nonlinearity of the network in image translation tasks. SA-AdaReLU is composed of two technologies: adaptive ReLU (AdaReLU) and structural adaptive function. The proposed AdaReLU can dynamically change the channel-wise data distribution to better utilize the features in negative regions, which helps to improve the control of the network when inner-domain translation is involved. Meanwhile, the structural adaptive function further enhances the feature selection ability of adaptive instance normalization (AdaIN) and enhances the network's spatial nonlinearity to manipulate the spatial structure on the feature maps. Extensive experiments have demonstrated the effectiveness of the proposed SA-AdaReLU. In addition, with SA-AdaReLU, fewer layers are required to achieve the same visual effect for building the generator, thus reducing the computational complexity.<br/></div> &copy; 2023 SPIE and IS&T.
Number of references:52
Main heading:Generative adversarial networks
Controlled terms:Adaptive control systems - Chemical activation - Deep learning - Discriminators - Image enhancement - Rectifying circuits
Uncontrolled terms:Activation functions - Adaptive functions - Data distribution - Deep learning - Image translation - Inner domain - Intra-domain - Linear units - Negative regions - Source images
Classification code:461.4  Ergonomics and Human Factors Engineering - 713.3  Modulators, Demodulators, Limiters, Discriminators, Mixers - 723.4  Artificial Intelligence - 731.1  Control Systems - 802.2  Chemical Reactions - 804  Chemical Products Generally
DOI:10.1117/1.JEI.32.2.023007
Funding details:  Number: -, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: -, Acronym: XIOPM, Sponsor: Xi'an Institute of Optics and Precision Mechanics;
Funding text:The research was supported by the Key Laboratory of Spectral Imaging Technology, Xi&rsquo;an Institute of Optics and Precision Mechanics of the Chinese Academy of Sciences, the Key Laboratory of Biomedical Spectroscopy of Xi&rsquo;an, the Outstanding Award for Talent Project of the Chinese Academy of Sciences, "From 0 to 1" Original Innovation Project of the Basic Frontier Scientific Research Program of the Chinese Academy of Sciences, and Autonomous Deployment Project of Xi&rsquo;an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences. The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 169>
 
Accession number:20232114129221
Title:Fast and Robust Restoration of Single Photon 3D Data Using Parameterized Kernel
Authors:Chen, Songmao (1); Su, Xiuqin (1); Zhang, Zhenyang (1); Xu, Weihao (1); Wang, Jie (1); Hao, Wei (1) 
Author affiliation:(1) Key Laboratory of Space Precision Measurement Technology, Xi&#x0027;an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi&#x0027;an, China 
Source title:IEEE Journal of Selected Topics in Quantum Electronics
Abbreviated source title:IEEE J Sel Top Quantum Electron
Issue date:2023
Publication year:2023
Pages:1-8
Language:English
ISSN:1077260X
E-ISSN:15584542
CODEN:IJSQEN
Document type:Article in Press
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">Single photon 3D imaging is an emerging topic for optronic sensing under extreme scenarios (e.g. spaceborne altimeter, long range imaging). However, such technique suffers from low photon counts and strong noise, which is due to either strong attenuation from the environment or reduced acquisition time. Although state-of-the-art algorithms have been proposed to achieve high resolution results from corrupted single photon 3D data, the trade-off between the restoration performance and computational complexity remains challenging. This paper presents a fast and robust restoration approach for single photon 3D data, which adaptively smooth the sparse and noisy histogram by applying a parameterized kernel and finally reconstruct the 3D image using matched filter. The implementation can be fast as the core step of the processing is generalized as a 3D convolution that can be solved by Fast Fourier Transform (FFT). The method is validated on various conditions and scenarios from Middbury dataset and real data, where the proposed method showed robust results as the competing state-of-the-art algorithms with fast implementation.<br/></div> IEEE
Main heading:Restoration
Controlled terms:Computational Imaging - Economic and social effects - Fast Fourier transforms - Graphic methods - Image reconstruction - Imaging systems - Matched filters - Photons - Three dimensional displays
Uncontrolled terms:3d restoration - Computational imaging - Histogram - Kernel - Noisy data - Single photons - Single-photon imaging - Sparse signals - Spatial correlations - Three-dimensional display
Classification code:703.2  Electric Filters - 722.2  Computer Peripheral Equipment - 746  Imaging Techniques - 921.3  Mathematical Transformations - 931.3  Atomic and Molecular Physics - 971  Social Sciences
DOI:10.1109/JSTQE.2023.3269747
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 170>
 
Accession number:20230813600591
Title:Infrared small target detection algorithm based on entropy weighted multiscale local contrast
Authors:Wei, Jingbo (1, 2); Chen, Rongli (1); Zhang, Ximing (1); Zhao, Hui (1) 
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China 
Corresponding author:Chen, Rongli(crl@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12557
Part number:1 of 1
Issue title:AOPC 2022: Optical Sensing, Imaging, and Display Technology
Issue date:2023
Publication year:2023
Article number:125570U
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510662285
Document type:Conference article (CA)
Conference name:2022 Applied Optics and Photonics China: Optical Sensing, Imaging, and Display Technology, AOPC 2022
Conference date:December 18, 2022  -  December 19, 2022
Conference location:Virtual, Online, China
Conference code:186412
Sponsor:Chinese Society for Optical Engineering (CSOE)
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">It is an important and challenging topic to deal with infrared small target detection with high detection rate, low false alarm rate and low computational complexity in various application fields. Aiming at solving the problem that the existing algorithms can not effectively enhance the real foreground target and suppress various complex background interference. This paper proposes an infrared small target detection algorithm based on entropy weighted multiscale local contrast. Firstly, the local contrast formula is redefined in the joint form of ratio and difference, which can enhance the target and suppress the background clutter. Secondly, the local entropy can be used to reflect the gray mutation in the local area of the image. We use the modified local entropy operator to weight the multiscale local contrast. Finally, we employ the adaptive threshold segmentation to separate the target from the background and obtain the final infrared small target. We test six groups of infrared image sequences with different targets and backgrounds, the backgrounds include mountain, forest, field, sea-sky, sky and thick cloud. Experimental results show that, the proposed algorithm can not only robustly detect infrared dim and small targets of different sizes in various complex backgrounds, but also has higher detection efficiency and lower false alarm rate compared with other traditional baseline methods.<br/></div> &copy; 2023 SPIE.
Number of references:7
Main heading:Entropy
Controlled terms:Errors - Image resolution - Infrared imaging - Signal detection
Uncontrolled terms:Adaptive thresholds - Complex background - Entropy operators - False alarm rate - Infrared small targets - Local contrast - Local entropy - Multiscale local contrast - Small target detection - Target detection algorithm
Classification code:641.1  Thermodynamics - 716.1  Information Theory and Signal Processing - 746  Imaging Techniques
DOI:10.1117/12.2648172
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 171>
 
Accession number:20230313385396
Title:Design of 50000 fps camera system for shooting of high-speed collision process    (Open Access)
Title of translation:&#29992;&#20110;&#39640;&#36895;&#30896;&#25758;&#36807;&#31243;&#25293;&#25668;&#30340; 5 &#19975;&#24103;&#25668;&#20687;&#31995;&#32479;&#35774;&#35745;    (Open Access)
Authors:Shi, Kui (1, 2); Yang, Hong-Tao (1); Peng, Jian-Wei (1); Wang, Hao (1); Yan, A-Qi (1) 
Author affiliation:(1) Xi&prime;an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi&prime;an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China 
Corresponding author:Yang, Hong-Tao(yanght@opt.ac.cn)
Source title:Guangxue Jingmi Gongcheng/Optics and Precision Engineering
Abbreviated source title:Guangxue Jingmi Gongcheng
Volume:31
Issue:1
Issue date:January 2023
Publication year:2023
Pages:69-77
Language:Chinese
ISSN:1004924X
CODEN:GJGOF4
Document type:Journal article (JA)
Publisher:Chinese Academy of Sciences
Abstract:<div data-language="eng" data-ev-field="abstract">In this study&#65292;a high-frame-frequency camera system is investigated to closely capture the colli-sion process of a high-speed moving target. As debris from the collision may get stuck to the front of the lens&#65292;a protective window assembly is considered. A thermal conduction device is also investigated be-cause the temperature of an FPGA installed in the imaging unit is too high&#65292;with a maximum temperature of 70&#8451; . A method for continuous photography with seven image units under the control of a sequence pulse is proposed&#65292;and the camera system achieved high frame-frequency imaging of 50&#65292;000 fps. The pro-tective window assembly includes three sets of self-locking protective window glasses that move automati-cally. A worm gear is utilized to realize a large transmission ratio and self-locking function&#65292;and a Hall sen-sor is used to report the position of the protection window in real time. The middle part of the heat conduc-tion device comprises flexible graphite plate with high thermal conductivity. Thus&#65292;the heat of the FPGA is transmitted effectively to the shell&#65292;and the problem of over-positioning of rigid heat conduction devices is solved during the installation and adjustment of the device. Vibration and heat tests were carried out on the assembled model camera. During and after the tests&#65292;the self-locking&#65292;movement and switching of the protective window component functioned properly&#65292;the camera worked normally&#65292;and the measured frame rate was 50050 frames/s. Hence&#65292;the camera system meets the requirements for clearly recording high-speed collisions&#65292;and provides a certain protection ability as well as adaptability to different thermal envi-ronments.<br/></div> &copy; 2023 Chinese Academy of Sciences. All rights reserved.
Number of references:10
Main heading:Field programmable gate arrays (FPGA)
Controlled terms:Graphite - Heat conduction - Integrated circuit design - Locks (fasteners) - Thermal conductivity - Video cameras
Uncontrolled terms:Camera systems - Collision process - Graphite films - High frame rate - High Speed - High speed moving targets - Protective window - Selflocking - Thermal designs - Worm gear and worm
Classification code:641.1  Thermodynamics - 641.2  Heat Transfer - 714.2  Semiconductor Devices and Integrated Circuits - 716.4  Television Systems and Equipment - 721.2  Logic Elements - 742.2  Photographic Equipment
DOI:10.37188/OPE.20233101.0069
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Bronze
 
<RECORD 172>
 
Accession number:20230813600570
Title:Research on data processing method for detection of small and weak targets in space
Authors:Sen, Tian (1, 2); Yan, Wen (1, 2) 
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China 
Corresponding author:Sen, Tian(aze19711008@163.com)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12557
Part number:1 of 1
Issue title:AOPC 2022: Optical Sensing, Imaging, and Display Technology
Issue date:2023
Publication year:2023
Article number:1255729
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510662285
Document type:Conference article (CA)
Conference name:2022 Applied Optics and Photonics China: Optical Sensing, Imaging, and Display Technology, AOPC 2022
Conference date:December 18, 2022  -  December 19, 2022
Conference location:Virtual, Online, China
Conference code:186412
Sponsor:Chinese Society for Optical Engineering (CSOE)
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">Space debris identification and localization has been studied for a long time at home and abroad, but there are still shortcomings in the detection of very low SNR small targets, especially the detection and recognition of very low SNR faint small targets submerged in the dense galactic background Stars in order to effectively target detection, background removal is essential, in order to distinguish between the target and the stars, through the accumulation of judgement block number of star closely adjacent to judge, if the judgment of the block, star closely adjacent number more than set threshold, so that the point for stars, on the other hand, argue that point as the goal to be detected, then, to the star point of the block The results of the algorithm show that, according to different star map images, the size of matrix block and the threshold of star point can be modified to achieve better star removal effect.<br/></div> &copy; 2023 SPIE.
Number of references:8
Main heading:Stars
Controlled terms:Data handling - Signal to noise ratio - Space debris
Uncontrolled terms:Data processing methods - Low signal-to-noise ratio - Milky ways - Multi-frame - Multiframe superposition - Small targets - Targets detection - The milky way background - Very low SNR - Weak targets
Classification code:656.1  Space Flight - 657.2  Extraterrestrial Physics and Stellar Phenomena - 716.1  Information Theory and Signal Processing - 723.2  Data Processing and Image Processing
DOI:10.1117/12.2652025
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 173>
 
Accession number:20230813600550
Title:A New Medical Image Transfer and Process Platform
Authors:Shen, Chao (1, 2); Li, Wei (1); Huang, Chao (1); Gao, Wei (1) 
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an; 710071, China; (2) University of Chinese Academy of Science, Beijing; 100049, China 
Corresponding author:Li, Wei
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12557
Part number:1 of 1
Issue title:AOPC 2022: Optical Sensing, Imaging, and Display Technology
Issue date:2023
Publication year:2023
Article number:1255707
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510662285
Document type:Conference article (CA)
Conference name:2022 Applied Optics and Photonics China: Optical Sensing, Imaging, and Display Technology, AOPC 2022
Conference date:December 18, 2022  -  December 19, 2022
Conference location:Virtual, Online, China
Conference code:186412
Sponsor:Chinese Society for Optical Engineering (CSOE)
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">This paper designs a new platform for medical image transfer and process. The hardware part of the platform is based on FPGA, USB and RS232. The software part is based on Windows platform, basing on MFC dialog application developed with C + + programming tools in Microsoft Visual Studio 2010. The platform collects images from medical devices and uses the hardware platform to transmit them to PC for display, the application program on PC can realize the image data process and analysis.<br/></div> &copy; 2023 SPIE.
Number of references:8
Main heading:Application programs
Controlled terms:C++ (programming language) - Display devices - Medical imaging
Uncontrolled terms:C++ programming - Image process - Image transfer - Medical image - MicroSoft - Platform - Process platforms - Programming tools - Software parts - Windows platform
Classification code:461.1  Biomedical Engineering - 722.2  Computer Peripheral Equipment - 723  Computer Software, Data Handling and Applications - 723.1.1  Computer Programming Languages - 746  Imaging Techniques
DOI:10.1117/12.2643681
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 174>
 
Accession number:20230613559943
Title:Optimal Design of Rectangular Mirror Based on Topology and Size Optimization
Authors:Zeng, Aoxiong (1, 2); Li, Fu (1) 
Author affiliation:(1) Xi&rsquo;an Institute of Optics and Precision Mechanics of Chinese Academy of Science, Shaanxi, Xi&rsquo;an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China 
Corresponding author:Li, Fu(lifu@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12555
Part number:1 of 1
Issue title:AOPC 2022: Infrared Devices and Infrared Technology; and Terahertz Technology and Applications
Issue date:2023
Publication year:2023
Article number:125550I
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510662247
Document type:Conference article (CA)
Conference name:2022 Applied Optics and Photonics China: Infrared Devices and Infrared Technology; and Terahertz Technology and Applications, AOPC 2022
Conference date:December 18, 2022  -  December 19, 2022
Conference location:Virtual, Online, China
Conference code:186187
Sponsor:Chinese Society for Optical Engineering (CSOE)
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">In this paper, a lightweight design is carried out for the rectangular reflector of a small space telescope project. This study suggests a lightweight optimization design strategy based on three-point support in accordance with the high surface figure accuracy and low weight requirements of the project's rectangle reflective mirror. The fundamental structure of the mirror based on SiC material is first obtained, starting from the features of material selection and support method. Then, we get some parameters such as the radius-thickness ratio of the mirror through theoretical calculation and analysis, and preliminarily optimized these parameters. By using the maximization of the overall stiffness as the objective function, and the mirror RMS value as the design restraint, the topology optimization of the mirror is carried out. Finally, considering factors such as processing and manufacturing, we take the methods of size optimization to get an optimal structural model. Through simulation analysis, it can be measured that the weight of the mirror is only 3.94kg, the lightweight rate is 58%, and the RMS value in the X, Y, Z three axes under 1 g gravity condition is far less than 1/25&lambda;(632.8nm) of the design index. This optimization method can well meet the design requirements.<br/></div> &copy; 2023 SPIE.
Number of references:10
Main heading:Mirrors
Controlled terms:Finite element method - Shape optimization - Silicon carbide - Structural design - Structural optimization - Topology
Uncontrolled terms:Finite element analyse - Lightweight - Lightweight design - Optimal design - Optimization design - Rectangular mirror - RMS values - Size optimization - Small space telescopes - Topology optimisation
Classification code:408.1  Structural Design, General - 741.3  Optical Devices and Systems - 804.2  Inorganic Compounds - 921.4  Combinatorial Mathematics, Includes Graph Theory, Set Theory - 921.5  Optimization Techniques - 921.6  Numerical Methods
Numerical data indexing:Mass 1.00E-03kg, Mass 3.94E+00kg, Percentage 5.80E+01%, Size 6.328E-07m
DOI:10.1117/12.2651749
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 175>
 
Accession number:20232114130669
Title:Design and stray light analysis of a high NA night vision zoom optical system
Authors:Xie, Bingqing (1); Chang, Jun (1); Li, Yiting (1); Li, Xuyang (2); Huang, Yi (1) 
Author affiliation:(1) School of Optics and Photonics, Beijing Institute of Technology, Beijing; 100081, China; (2) Xi'an Institute of Optics and Precision Mechanics, CAS, Xi'an, China 
Corresponding author:Chang, Jun
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12617
Part number:1 of 1
Issue title:Ninth Symposium on Novel Photoelectronic Detection Technology and Applications
Issue date:2023
Publication year:2023
Article number:126177I
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510664432
Document type:Conference article (CA)
Conference name:9th Symposium on Novel Photoelectronic Detection Technology and Applications
Conference date:April 21, 2023  -  April 23, 2023
Conference location:Hefei, China
Conference code:188142
Sponsor:Chinese Society for Optical Engineering; Science and Technology on Low-light-level Night Vision Laboratory
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">In order to solve the problems of limited clear viewing range and small field angle of the existing night vision equipment, a large numerical aperture zoom night vision objective is designed combined with the zoom optical imaging technology. The night vision zoom objective designed uses a lens with large curvature on the first surface to achieve large field of view detection. The aspheric surface is added to improve the imaging quality of the system and reduce the weight of the system, so that users can have a better user experience when using the objective lens. The operating band of the objective lens is 436nm-656nm, the focus range is 4.5mm-40mm, and the maximum field angle can reach 74 &deg;. Finally, through simulation analysis, the MTF (Modulation Transfer Function, MTF) of the system at Nyquist frequency under different focal lengths is greater than 0.3, and the imaging quality is good. Through stray light analysis, it is found that the designed system is less affected by stray light in the central field of view and the half field of view, while the edge field of view is more affected by stray light.<br/></div> &copy; 2023 SPIE.
Number of references:9
Main heading:Optical design
Controlled terms:Image quality - Imaging systems - Optical instrument lenses - Optical systems - Optical transfer function - Quality control - Stray light - Vision
Uncontrolled terms:Field angle - Field of views - High NA - Imaging quality - Night vision - Night vision systems - Objective lens - Stray light analyse - Zoom optical system - Zoom systems
Classification code:741.1  Light/Optics - 741.3  Optical Devices and Systems - 746  Imaging Techniques - 913.3  Quality Assurance and Control
Numerical data indexing:Size 4.36E-07m to 6.56E-07m, Size 4.50E-03m to 4.00E-02m
DOI:10.1117/12.2666850
Funding details:  Number: 2021YFC2202100, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;
Funding text:This work is supported by National Key R&D Program of China(2021YFC2202100). The authors declare no conflicts of interest.
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 176>
 
Accession number:20230613566289
Title:Research on thermal stability of monolithic near-infrared Doppler asymmetric spatial heterodyne interferometer
Authors:Chang, Chenguang (1, 2); Fu, Di (1, 2); Zhao, Hengxiang (1); Hao, Xiongbo (1); Li, Juan (1); Wang, Pengchong (1); Sun, Jian (1); Feng, Xiangpeng (1); Kong, Liang (1, 2); Feng, Yutao (1) 
Author affiliation:(1) Chinese Academy of Sciences, Xi'an Institute of Optics and Precision Mechanics, Xi'an, China; (2) University of Chinese Academy of Sciences, Beijing, China 
Corresponding author:Feng, Yutao(fytciom@126.com)
Source title:Optical Engineering
Abbreviated source title:Opt Eng
Volume:62
Issue:1
Issue date:January 1, 2023
Publication year:2023
Report number:20221180G
Article number:015104
Language:English
ISSN:00913286
E-ISSN:15602303
CODEN:OPEGAR
Document type:Journal article (JA)
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">A Doppler asymmetric spatial heterodyne (DASH) interferometer was designed to measure atmospheric winds at a height of 60 to 80 km by observing the airglow emission line of molecular oxygen at 867 nm. The designed monolithic DASH interferometer exhibited decent thermal stability. The phase thermal drift of the fabricated interferometer obtained from thermal performance measurements was 0.376 rad/&deg;C. To accurately model and minimize the thermal drift performance of an interferometer in the design phase, it is necessary to include the influence of thermal distortion of the monolithic interferometer components. Therefore, an optical-structural-thermal integrated analysis method based on Zernike polynomials was proposed to accurately calculate the phase thermal drift of the interferometer. The optical model modified by the finite-element method calculated the phase thermal drift to be 0.420 rad/&deg;C, which agreed with the experimental result within 11.7%. This analysis method can accurately calculate and optimize thermal stability during the design of a DASH interferometer.<br/></div> &copy; 2022 Society of Photo-Optical Instrumentation Engineers (SPIE).
Number of references:28
Main heading:Thermodynamic stability
Controlled terms:Infrared devices - Interferometers - Molecular oxygen
Uncontrolled terms:Analysis method - Atmospheric Winds - Dopple asymmetric spatial heterodyne interferometer - Doppler - Heterodyne interferometer - Integrated analysis - Monolithics - Near Infrared - Spatial heterodyne - Thermal drifts
Classification code:641.1  Thermodynamics - 804.2  Inorganic Compounds - 941.3  Optical Instruments
Numerical data indexing:Absorbed dose 3.76E-03Gy, Absorbed dose 4.20E-03Gy, Percentage 1.17E+01%, Size 6.00E+04m to 8.00E+04m, Size 8.67E-07m
DOI:10.1117/1.OE.62.1.015104
Funding details:  Number: 41005019, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: E1294301, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: XAB 2016A07, Acronym: -, Sponsor: West Light Foundation of the Chinese Academy of Sciences;Number: 2019JQ-931, Acronym: -, Sponsor: Natural Science Basic Research Program of Shaanxi Province;
Funding text:This work was supported by the National Natural Science Foundation of China (Grant No. 41005019), West Light Foundation of Chinese Academy of Sciences (Grant No. XAB 2016A07), Natural Science Basic Research Program of Shaanxi Province (Grant No. 2019JQ-931), and West Light Cross Disciplinary Innovation Team of Chinese Academy of Sciences (Grant No. E1294301). The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 177>
 
Accession number:20230713574398
Title:Progress of Raman spectroscopy technology for the detection of material composition on the surface of Mars
Authors:Xie, Xinmei (1, 2); 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:Yang, Jianfeng(yangjf@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12558
Part number:1 of 1
Issue title:AOPC 2022: Optical Spectroscopy and Imaging
Issue date:2023
Publication year:2023
Article number:125580C
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510662308
Document type:Conference article (CA)
Conference name:2022 Applied Optics and Photonics China: Optical Spectroscopy and Imaging, AOPC 2022
Conference date:December 18, 2022  -  December 19, 2022
Conference location:Virtual, Online, China
Conference code:186190
Sponsor:Chinese Society for Optical Engineering (CSOE)
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">Mars exploration is the biggest hot spot of deep space exploration after lunar exploration, and it is also an important target of manned planetary exploration in the future. For Mars exploration, the detection of its surface material composition is one of the important scientific tasks. This paper mainly introduces a new method for the detection of material components on the surface of Mars-Raman spectroscopy technology, briefly explains the principle of Raman scattering, summarizes the research progress of Raman spectroscopy technology for the detection of material components on the surface of Mars at home and abroad, and analyzes the development prospect of Raman spectroscopy technology in the field of Mars exploration.<br/></div> &copy; COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.
Number of references:11
Main heading:Raman spectroscopy
Controlled terms:Interplanetary flight - Interplanetary spacecraft - Lunar missions - Martian surface analysis - Rovers - Space research - Spectrometers
Uncontrolled terms:Detection of materials - Mars exploration - Martian surface - Martian surface material composition - Material components - Material compositions - Raman spectrometers - Spectroscopy technology - Surface materials - Surface of Mars
Classification code:655.1  Spacecraft, General - 656.1  Space Flight - 656.2  Space Research - 741.3  Optical Devices and Systems
DOI:10.1117/12.2651495
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 178>
 
Accession number:20224012838341
Title:A signal separation method based on the subarray beam synthesis    (Open Access)
Authors:Liu, Chengzhou (1); Wang, Jianhui (1); Cui, Weijia (1); Xu, Haiyun (1); Yang, Bingqing (2) 
Author affiliation:(1) National Digital Switching System Engineering & Technological Research Center, Henan, Zhengzhou, China; (2) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shaanxi, Xi'an, China 
Corresponding author:Liu, Chengzhou(liuzhouzhou2022@163.com)
Source title:IET Radar, Sonar and Navigation
Abbreviated source title:IET Radar Sonar Navig.
Volume:17
Issue:2
Issue date:February 2023
Publication year:2023
Pages:191-199
Language:English
ISSN:17518784
E-ISSN:17518792
Document type:Journal article (JA)
Publisher:John Wiley and Sons Inc
Abstract:<div data-language="eng" data-ev-field="abstract">Large-scale arrays are widely used due to their advantages of high gain, high resolution, and strong beam control capability. The large number of antennas leads to a sharp increase in computational complexity, and thus, it is necessary to reduce the complexity of signal processing. A signal separation method is proposed based on subarray beam synthesis. This method can improve signal reception and separation performance through zero-forcing calculation and realise system gain and phase error corrections in the front end of an antenna. Compared with back-end processing, it has the advantage of low implementation difficulty. The feasibility and performance of the method are verified by simulations.<br/></div> &copy; 2022 The Authors. IET Radar, Sonar & Navigation published by John Wiley & Sons Ltd on behalf of The Institution of Engineering and Technology.
Number of references:24
Main heading:Beamforming
Controlled terms:Beam forming networks - Error correction - Separation
Uncontrolled terms:Beam synthesis - Error calibration - Gain and phase error - Gain and phase error calibration - High gain - High resolution - Large-scale arrays - Separation methods - Signal separation - Sub-array beams
Classification code:711.2  Electromagnetic Waves in Relation to Various Structures - 716  Telecommunication; Radar, Radio and Television - 802.3  Chemical Operations
DOI:10.1049/rsn2.12332
Funding details:  Number: -, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This work was supported in part by Grant No. 62171468 from National Natural Science Foundation of China.
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
 
<RECORD 179>
 
Accession number:20230813600571
Title:Design and optimization research of &Phi; 1.6m space mirror and its supporting structure
Authors:Wei, De Jing (1, 2); Wang, Wei (1); Hu, Bin (1); Lin, Shang Min (1); Cheng, Peng Fei (1) 
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Science No.17, Xinxi Road, Xi'an, China; (2) University of Chinese Academy of Science, Beijing, China 
Corresponding author:Wang, Wei(wangwei@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12557
Part number:1 of 1
Issue title:AOPC 2022: Optical Sensing, Imaging, and Display Technology
Issue date:2023
Publication year:2023
Article number:1255730
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510662285
Document type:Conference article (CA)
Conference name:2022 Applied Optics and Photonics China: Optical Sensing, Imaging, and Display Technology, AOPC 2022
Conference date:December 18, 2022  -  December 19, 2022
Conference location:Virtual, Online, China
Conference code:186412
Sponsor:Chinese Society for Optical Engineering (CSOE)
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">This article aiming at the high performance requirements of the space camera mirror assembly, and in order to ensure that the space camera main mirror has good surface shape accuracy and high first-order natural frequency, the mirror and flexible support structure are studied and designed. First, according to the selection principle of the mirror material, SiC is selected as the mirror blank material of the mirror. According to the empirical formula, the three-point support scheme on the back of the mirror and the structural size parameters of the mirror body are determined. And a flexible support structure with multi-axis flexible hinge and dual-axis flexible hinge in series is designed for the mirror. Finally, the parameter optimization method is used to optimize the position radius of the mirror back support hole and the key dimensions of the flexible structure&#12290;The static analysis and modal analysis of the mirror assembly were carried out using the finite element method&#12290;The results show that the surface shape accuracy of the mirror is 0.015&lambda; nm, the first-order natural frequency of the mirror is 145.57Hz, the weight is 135.35Kg, and the lightweight rate is 87.57%.<br/></div> &copy; 2023 SPIE.
Number of references:5
Main heading:Mirrors
Controlled terms:Cameras - Flexible structures - Ground supports - Modal analysis - Natural frequencies - Silicon carbide
Uncontrolled terms:First order natural frequency - Flexible hinges - Flexible supports - Hybrid flexible hinge - Large-aperture mirrors - Lightweight - Mirror assembly - Parameter optimization - Space cameras - Surface shape
Classification code:408.2  Structural Members and Shapes - 741.3  Optical Devices and Systems - 742.2  Photographic Equipment - 804.2  Inorganic Compounds - 921  Mathematics
Numerical data indexing:Frequency 1.4557E+02Hz, Percentage 8.757E+01%, Size 1.60E+00m
DOI:10.1117/12.2651768
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 180>
 
Accession number:20232314186037
Title:Ground test bench for X-ray pulsar navigation dynamic simulation
Title of translation:"&#22825;&#26530;&#8545;&#21495;"X &#23556;&#32447;&#33033;&#20914;&#26143;&#23548;&#33322;&#21160;&#24577;&#27169;&#25311;&#31995;&#32479;&#21450;&#23454;&#39564;&#39564;&#35777;
Authors:Sheng, Lizhi (1); Zheng, Wei (2); Su, Tong (1); Zhang, Dapeng (2); Wang, Yidi (2); Yang, Xianghui (1); Xu, Neng (1); Li, Zhize (2) 
Author affiliation:(1) Xi&rsquo;an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi&rsquo;an; 710119, China; (2) College of Aerospace Science and Engineering, National University of Defense Technology, Changsha; 410073, China 
Corresponding author:Sheng, Lizhi(shenglizhi80@163.com)
Source title:Hangkong Xuebao/Acta Aeronautica et Astronautica Sinica
Abbreviated source title:Hangkong Xuebao
Volume:44
Issue:3
Issue date:February 15, 2023
Publication year:2023
Article number:526656
Language:Chinese
ISSN:10006893
CODEN:HAXUDJ
Document type:Journal article (JA)
Publisher:Chinese Society of Astronautics
Abstract:<div data-language="eng" data-ev-field="abstract">Theoretical and preliminary experimental studies of X-ray pulsar-based navigation have been carried out at home and abroad&#65292;but there are still some defects such as lack of credible experimental verification and imperfect theo&#8259; retical model. In this paper&#65292;a method for simulation of X-ray pulsar dynamic signals is proposed&#65292;which can be used to generate the pulsar dynamic signal based on X-ray pulsar properties and the spacecraft orbit model. An X-ray pulsar simulation source and the whole ground test bench are developed. Static and dynamic ground simulation tests are per&#8259; formed. Based on the parameters of the pulsars PSR B0531+21 and PSR B1937+21&#65292;the pulse profile similarity ob&#8259; tained with the static simulation test is 99. 5% and 99. 1%&#65292;respectively. Dynamic simulation tests of the two pulsars at the circular orbit height of 200 km are performed. Deviation of the test results and the theory results of the pulse period is 38 451 ps and 350 ps and the pulse profile similarity is 99. 8% and 99. 9% when the timing coordinate transfer to SSB&#65292;for PSR B0531+21 and PSR B1937+21&#65292;respectively. The test bench system can realize orbit maneuver simu&#8259; lation based on the Hofmann model. The ground experiment system has stable performance and can meet the needs of different types of simulation experiments.<br/></div> &copy; 2023 AAAS Press of Chinese Society of Aeronautics and Astronautics. All rights reserved.
Number of references:23
Main heading:Pulsars
Controlled terms:Hardware-in-the-loop simulation - Orbits - Synthetic apertures - X ray detectors
Uncontrolled terms:Dynamic experiment - Dynamic signals - Ground tests - Hardwarein-the-loop simulations (HIL) - Simulation tests - Test-bench - X-ray detector - X-ray pulsar-based navigation - X-ray pulsars - X-ray simulation source
Classification code:657.2  Extraterrestrial Physics and Stellar Phenomena - 716.2  Radar Systems and Equipment
Numerical data indexing:Percentage 1.00E00%, Percentage 5.00E+00%, Percentage 8.00E+00%, Percentage 9.00E+00%, Size 2.00E+05m, Time 3.50E-10s, Time 4.51E-10s
DOI:10.7527/S1000-6893.2022.26656
Funding details:  Number: 61901470,XAB2020YN13, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: SKLIPR2021, Acronym: -, Sponsor: State Key Laboratory of Intense Pulsed Radiation Simulation and Effect;
Funding text:Foundation items&#65306;National Natural Science Foundation of China &#65288;61901470&#65289;&#65307; The CAS "Light of West China" Program &#65288;XAB2020YN13&#65289;&#65307;State Key Laboratory Fund of Intense Pulsed Radiation Simulation and Effect &#65288;SKLIPR2021&#65289;
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 181>
 
Accession number:20231213750733
Title:Electrical treeing failure in silicone gel insulation for encapsulation under high frequency bipolar square-wave voltage
Authors:Zhang, Chuang (1); Wang, Shihang (1); Chen, Zhen (2); Zhang, Haoran (1); Zha, Xiaopeng (1); Zhou, Fusheng (1); Li, Jianying (1); Li, Shengtao (1) 
Author affiliation:(1) State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an Shaanxi; 710049, China; (2) Xi 'an Institute of Optics and Precision Mechanics of CAS, Xi'an Shaanxi; 710049, China 
Corresponding author:Wang, Shihang(wangsh@mail.xjtu.edu.cn)
Source title:Engineering Failure Analysis
Abbreviated source title:Eng. Fail. Anal.
Volume:148
Issue date:June 2023
Publication year:2023
Article number:107092
Language:English
ISSN:13506307
CODEN:EFANEM
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">Silicone gel insulation has been widely used in power electronic devices, serving as the encapsulation material. Its dielectric strength under high-frequency voltage determines the reliable operation of the devices. Electrical tree is a typical failure of solid insulating materials, and the electrical tree propagation in silicone gel under bipolar square-wave voltage are investigated in this paper. The results show that electrical trees are pearl-line like, bush-like and bubble-like under varied voltage conditions. After the rapid growth period, the electrical trees stagnate under frequency lower than 20 kHz while develop steadily when the voltage frequency is higher than 25 kHz. The number of tree branch, fractal dimension and accumulated damage increase with the voltage frequency. In comparison, the electrical trees propagate slowly under sinusoidal-wave voltage. The partial discharge and photo-degradation corresponding to the fluorescence are found in main tree channel, which are related to voltage waveform and lead to different electrical tree behavior. The injection and transportation of space charge accelerates the electrical tree propagation, especially at the rising/falling edge of bipolar square-wave field due to polarity reversal. Besides, the amorphous carbon deposited near the needle tip and the bubbles in tree channels filled with hydrogen and carbon monoxide are all related with the electrical tree propagation.<br/></div> &copy; 2023 Elsevier Ltd
Number of references:51
Main heading:Insulation
Controlled terms:Amorphous carbon - Carbon monoxide - Electric power systems - Fractal dimension - Insulating materials - Partial discharges - Silicones
Uncontrolled terms:Bipolar square-wave voltage - Electrical tree propagation - Electrical treeing - Electrical trees - Encapsulating insulation - High frequency HF - Silicone gels - Square-wave - Voltage frequency - Wave voltages
Classification code:413  Insulating Materials - 701.1  Electricity: Basic Concepts and Phenomena - 706.1  Electric Power Systems - 804.2  Inorganic Compounds - 815.1.1  Organic Polymers - 921  Mathematics - 933.2  Amorphous Solids
Numerical data indexing:Frequency 2.00E+04Hz, Frequency 2.50E+04Hz
DOI:10.1016/j.engfailanal.2023.107092
Funding details:  Number: 51907147,52107028, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:The authors gratefully acknowledge the financial support from National Natural Science Foundation of China (Nos. 51907147 and 52107028).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 182>
 
Accession number:20230413411243
Title:Simulated wrapped phase optimizes phase retrieval in phase-shifting interferometry
Authors:Zhu, Xindong (1); Lian, Liping (2); Yang, Pengcheng (2); Chang, Zehong (1); Huang, Xiaoting (1); Wang, Xian (3); Yu, Zijian (2); Zhang, Pei (1, 4) 
Author affiliation:(1) Ministry of Education Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Shaanxi Province Key Laboratory of Quantum Information and Quantum Optoelectronic Devices, School of Physics, Xi'an Jiaotong University, Xi'an; 710049, China; (2) Mechanical and Electrical Engineering College, Xi'an Polytechnic University, Xi'an; 710048, China; (3) School of Mechanical and Precision Instrument Engineering, Xi'an University of Technology, Xi'an; 710048, China; (4) State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun; 130033, China 
Corresponding author:Zhang, Pei(zhangpei@mail.ustc.edu.cn)
Source title:Optics Letters
Abbreviated source title:Opt. Lett.
Volume:48
Issue:2
Issue date:January 15, 2023
Publication year:2023
Pages:211-214
Language:English
ISSN:01469592
E-ISSN:15394794
CODEN:OPLEDP
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">Phase retrieval is crucial in phase-shifting interferometry and other phase measurement techniques. However, in noisy wrapped phase maps with high steepness, discontinuities arise and cause phase unwrapping errors. To solve this problem, this Letter presents a phase retrieval method based on a simulated wrapped phase. By establishing the correspondence between the simulated and measured interferograms, the difference in wrapped phases between them can be obtained. The difference in wrapped phase map, which has sparse and wide interference fringes, has a higher reliability of phase unwrapping. The proposed method not only possesses high phase retrieval accuracy but it also simplifies the processing of interferograms. Furthermore, the layout of all interferometric systems, the parameters of optical components, and the model of the measured object are known, so the proposed method can be used as a reference for phase retrieval.<br/></div> &copy; 2023 Optica Publishing Group.
Number of references:31
Main heading:Interferometry
Uncontrolled terms:In-phase - Interference fringe - Interferograms - Measurement techniques - Phase retrieval - Phase shifting Interferometry - Phase-unwrapping - Retrieval methods - Wrapped phase - Wrapped phase map
Classification code:941.4  Optical Variables Measurements
DOI:10.1364/OL.476543
Funding details:  Number: 300102250506, Acronym: -, Sponsor: -;Number: 12174301,51905412,52205067,91736104, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2022JM-219,2022JQ-403, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;
Funding text:Funding. National Natural Science Foundation of China (12174301, 51905412, 52205067, 91736104); The Key Laboratory of Expressway Construction Machinery of Shaanxi Province (300102250506); Natural Science Basic Research Plan in Shaanxi Province of China (2022JM-219, 2022JQ-403).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 183>
 
Accession number:20230813600595
Title:Correlation filter tracking algorithms against interference of similar object and fast motion
Authors:Ren, Sixi (1, 2, 3); Tian, Yan (1, 3); Xu, Zhaohui (1, 3); Guo, Min (1, 3) 
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, China; (2) University of Chinese Academy of Science, Beijing, China; (3) CAS Key Laboratory of Space Precision Measurement Technology, Xi'an, China 
Corresponding author:Ren, Sixi(rensixi20@mails.ucas.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12557
Part number:1 of 1
Issue title:AOPC 2022: Optical Sensing, Imaging, and Display Technology
Issue date:2023
Publication year:2023
Article number:125570Y
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510662285
Document type:Conference article (CA)
Conference name:2022 Applied Optics and Photonics China: Optical Sensing, Imaging, and Display Technology, AOPC 2022
Conference date:December 18, 2022  -  December 19, 2022
Conference location:Virtual, Online, China
Conference code:186412
Sponsor:Chinese Society for Optical Engineering (CSOE)
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">fDSST (fast Discriminative Scale Space Tracking) belongs to correlation filter tracking algorithm, which has high success rate and precision, also runs at a fast speed. However, it is still a huge challenge for the tracking scene of fast motion and similar object interference. In order to improve the performance of fDSST on the challenges above, this paper proposed fDSSTs algorithm and fDSSTss algorithm respectively. fDSSTs increases the response scores near the object location by fusing the fhog feature and the color statistical feature, so improved the tracking performance of fDSST in the fast moving scene. fDSSTss adds a multi-feature object association module on the basis of fDSST, which distinguishes the real object and the interference object from the object feature level, thereby maintaining the tracking of the real object. The fDSSTs is tested on the OTB50 dataset, in fast-moving scenarios, the success rate of fDSST is improved by 20.5% and the precision is improved by 22.8% compared with fDSST. The fDSSTss is tested on the test sequences of similar object interference, and the result shows that fDSSTss has better anti-similar object interference ability than fDSST, while meeting the real-time requirements. The experiments show that the improvements improve the success rate and precision of fDSST in fast object moving scenes, as well as the ability to resist similar object interference.<br/></div> &copy; 2023 SPIE.
Number of references:9
Main heading:Tracking (position)
Controlled terms:Image processing
Uncontrolled terms:Correlation filters - Fast motions - Features extraction - Features fusions - Filter tracking - Object Tracking - Real objects - Scale spaces - Tracking algorithm - Trajectory associations
Classification code:723.2  Data Processing and Image Processing
Numerical data indexing:Percentage 2.05E+01%, Percentage 2.28E+01%
DOI:10.1117/12.2649713
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 184>
 
Accession number:20225213300071
Title:Cascaded transfer of optical frequency with a relay station over a 224 km deployed fiber link
Authors:Zang, Qi (1, 3, 4); Deng, Xue (1, 2, 3); Zhang, Xiang (1, 3); Wang, Dan (1, 2, 3); Zhou, Qian (1, 2, 3); Jiao, Dongdong (1, 3); Xu, Guanjun (1, 3); Gao, Jing (1, 3); Liu, Jie (1, 3); Liu, Tao (1, 2, 3); Dong, Ruifang (1, 2, 3); Zhang, Shougang (1, 2, 3) 
Author affiliation:(1) National Time Service Center, Chinese Academy of Sciences, Xi'an; 710600, China; (2) University of Chinese Academy of Sciences, Beijing; 100039, China; (3) Key Laboratory of Time and Frequency Standards, Chinese Academy of Sciences, Xi'an; 710600, China; (4) State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xi'an; 710119, China 
Corresponding authors:Liu, Tao(taoliu@ntsc.ac.cn); Dong, Ruifang(dongruifang@ntsc.ac.cn)
Source title:Infrared Physics and Technology
Abbreviated source title:Infrared Phys Technol
Volume:128
Issue date:January 2023
Publication year:2023
Article number:104511
Language:English
ISSN:13504495
CODEN:IPTEEY
Document type:Journal article (JA)
Publisher:Elsevier B.V.
Abstract:<div data-language="eng" data-ev-field="abstract">In this paper, we demonstrate a cascaded transfer of optical frequency with a relay station over a fiber link. The station is outfitted to cascade numerous lines with independent phase locking and provide high optical gain. The relay station receives the signal from the former link and compensates for the power loss with a two-stage EDFA (erbium-doped fiber amplification), and seeds the amplified signal into the next fiber link. By actively suppressing the parasitic noise with a two-stage EDFA, low-noise optical amplification with 50 dB gain is achieved. The two-stage EDFA's simple phase-locking structure also guarantees the system's long-term stability and reliable operation. With this relay station, we transfer a laser frequency along with a 224 km deployed fiber link, and the frequency at the remote end achieves a fractional instability of 3.39&times;10<sup>&minus;16</sup> at 1 s averaging time on a 2 Hz measurement bandwidth, reaching 8.36&times;10<sup>&minus;19</sup> at 10,000 s. This work paves a way for the future fiber optical frequency transfer network across the nationwide area and it has the potential to be an important part of the cascaded transfer network.<br/></div> &copy; 2022 Elsevier B.V.
Number of references:27
Main heading:Natural frequencies
Controlled terms:Erbium doped fiber amplifiers - Fibers - Locks (fasteners) - Optical materials - Telecommunication repeaters
Uncontrolled terms:Cascaded transfer - Deployed fiber - Fiber links - Fiber networks - Frequency transfer - Optical frequency - Optical frequency transfer - Phase-locking - Relay stations - Ultra-stable lasers
Classification code:741.1.2  Fiber Optics - 741.3  Optical Devices and Systems - 744.7  Laser Components
Numerical data indexing:Decibel 5.00E+01dB, Frequency 2.00E+00Hz, Size 2.24E+05m, Time 1.00E+04s, Time 1.00E00s
DOI:10.1016/j.infrared.2022.104511
Funding details:  Number: SKLST202011, Acronym: -, Sponsor: -;Number: E019XK104, Acronym: -, Sponsor: -;Number: 12103059, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: XDB21030800, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: XAB2016B74, Acronym: -, Sponsor: West Light Foundation of the Chinese Academy of Sciences;
Funding text:This work was supported by The Strategic Priority Research Program of the Chinese Academy of Sciences under (Grant No. XDB21030800); West Light Foundation of the Chinese Academy of Sciences (Grant No. XAB2016B74); The Open Project Fund of State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences (Gtant No. SKLST202011); National Natural Science Foundation of China (Grant No. 12103059) and Planned Project of Xi'an Bureau of Science and Technology, China (Grant No. E019XK104).This work was supported by The Strategic Priority Research Program of the Chinese Academy of Sciences under (Grant No. XDB21030800 ); West Light Foundation of the Chinese Academy of Sciences (Grant No. XAB2016B74 ); The Open Project Fund of State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences (Gtant No. SKLST202011 ); National Natural Science Foundation of China (Grant No. 12103059 ) and Planned Project of Xi&rsquo;an Bureau of Science and Technology, China (Grant No. E019XK104 ).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 185>
 
Accession number:20232514283002
Title:Suppressing grating lobes of large-aperture optical phased array with circular array design
Authors:Lei, Yufang (1, 2); Zhang, Lingxuan (1, 2); Xue, Yulong (1, 2); Ren, Yangming (1, 2); Zhang, Qihao (1, 2); Zhang, Wenfu (1, 2); Sun, Xiaochen (1, 2) 
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi&rsquo;an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi&rsquo;an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China 
Corresponding author:Sun, Xiaochen(sunxiaochen@opt.ac.cn)
Source title:Applied Optics
Abbreviated source title:Appl. Opt.
Volume:62
Issue:15
Issue date:May 20, 2023
Publication year:2023
Pages:4110-4114
Language:English
ISSN:1559128X
E-ISSN:21553165
CODEN:APOPAI
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">An optical phased array (OPA), especially a two-dimensional (2D) OPA, suffers from the trade-off among steering range, beam width, and the number of antennas. Aperiodic 2D array designs currently aimed to reduce the number of antennas and reduce grating lobes within a wide range fall short when an aperture approaches millimeter size. A circular OPA design is proposed to address this issue. The circular design substantially reduces the number of antennas while achieving the same wide steering range and narrow beam width of optimized aperiodic 2D OPA designs. Its efficient suppression of grating lobes, the key to a wide steering range with minimal number of antennas and large antenna spacing, is theoretically studied and validated by simulation. The novel, to the best of our knowledge, design allows less than 100 antennas, orders of magnitude reduction, for millimeter size aperture OPA designs. It paves the way for commercialization by significantly reducing control complexity and power consumption.<br/></div> &copy; 2023 Optica Publishing Group.
Number of references:20
Main heading:Economic and social effects
Controlled terms:Antenna lobes - Antenna phased arrays
Uncontrolled terms:2D-arrays - Array design - Beam widths - Circular arrays - Circular designs - Grating lobes - Large aperture - Optical phased arrays - Trade off - Two-dimensional
Classification code:971  Social Sciences
DOI:10.1364/AO.488916
Funding details:  Number: 12004421,61635013,61675231, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 2020M673523, Acronym: -, Sponsor: China Postdoctoral Science Foundation;Number: -, Acronym: XIOPM, Sponsor: Xi'an Institute of Optics and Precision Mechanics;Number: 2019JQ-447, Acronym: -, Sponsor: Natural Science Basic Research Program of Shaanxi Province;
Funding text:Funding. National Natural Science Foundation of China (12004421, 61635013, 61675231); China Postdoctoral Science Foundation (2020M673523); Natural Science Basic Research Program of Shaanxi Province (2019JQ-447). Open Research Fund for Development of High-end Scientific Instruments and Core Components of the Center for Shared Technologies and Facilities, XIOPM, Chinese Academy of Sciences
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 186>
 
Accession number:20232314177540
Title:Si Photonics FMCW LiDAR Chip with Solid-State Beam Steering by Interleaved Coaxial Optical Phased Array    (Open Access)
Authors:Lei, Yufang (1, 2); Zhang, Lingxuan (1, 2); Yu, Zhiyuan (1); Xue, Yulong (1, 2); Ren, Yangming (1, 2); Sun, Xiaochen (1, 2) 
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi&rsquo;an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi&rsquo;an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China 
Corresponding authors:Zhang, Lingxuan(zhanglingxuan@opt.ac.cn); Sun, Xiaochen(sunxiaochen@opt.ac.cn)
Source title:Micromachines
Abbreviated source title:Micromachines
Volume:14
Issue:5
Issue date:May 2023
Publication year:2023
Article number:1001
Language:English
E-ISSN:2072666X
Document type:Journal article (JA)
Publisher:MDPI
Abstract:<div data-language="eng" data-ev-field="abstract">LiDAR has attracted increasing attention because of its strong anti-interference ability and high resolution. Traditional LiDAR systems rely on discrete components and face the challenges of high cost, large volume, and complex construction. Photonic integration technology can solve these problems and achieve high integration, compact dimension, and low-cost on-chip LiDAR solutions. A solid-state frequency-modulated continuous-wave LiDAR based on a silicon photonic chip is proposed and demonstrated. Two sets of optical phased array antennas are integrated on an optical chip to form a transmitter&ndash;receiver interleaved coaxial all-solid-state coherent optical system which provides high power efficiency, in principle, compared with a coaxial optical system using a 2 &times; 2 beam splitter. The solid-state scanning on the chip is realized by optical phased array without a mechanical structure. A 32-channel transmitter&ndash;receiver interleaved coaxial all-solid-state FMCW LiDAR chip design is demonstrated. The measured beam width is 0.4&deg; &times; 0.8&deg;, and the grating lobe suppression ratio is 6 dB. Preliminary FMCW ranging of multiple targets scanned by OPA was performed. The photonic integrated chip is fabricated on a CMOS-compatible silicon photonics platform, providing a steady path to the commercialization of low-cost on-chip solid-state FMCW LiDAR.<br/></div> &copy; 2023 by the authors.
Number of references:16
Main heading:Silicon photonics
Controlled terms:Antenna phased arrays - Costs - Frequency modulation - Optical instruments - Optical radar - Optical systems - Photonic devices - Transmitters
Uncontrolled terms:All-solid state - Anti-interference - Beam-steering - High resolution - LiDAR - Low-costs - On chips - Optical phased arrays - Si photonics - Silicon photonics
Classification code:716.2  Radar Systems and Equipment - 741.1  Light/Optics - 741.3  Optical Devices and Systems - 911  Cost and Value Engineering; Industrial Economics - 941.3  Optical Instruments
Numerical data indexing:Decibel 6.00E+00dB
DOI:10.3390/mi14051001
Funding details:  Number: 12004421,61635013,61675231, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: 2020M673523, Acronym: -, Sponsor: China Postdoctoral Science Foundation;Number: 2019JQ-447, Acronym: -, Sponsor: Natural Science Foundation of Shaanxi Province;Number: -, Acronym: XIOPM, Sponsor: Xi'an Institute of Optics and Precision Mechanics;
Funding text:This research was funded by National Natural Science Foundation of China (12004421, 61635013, 61675231); China Postdoctoral Science Foundation (2020M673523); Natural Science Foundation of Shaanxi Province (2019JQ-447); Open Research Fund for development of high-end scientific instruments and core components of the Center for Shared Technologies and Facilities, XIOPM, CAS.
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold, Green
 
<RECORD 187>
 
Accession number:20230813614016
Title:TransMVU: Multi-view 2D U-Nets with transformer for brain tumour segmentation    (Open Access)
Authors:Liu, Zengxin (1, 2, 3); Ma, Caiwen (1, 2); She, Wenji (1, 3); Wang, Xuan (1, 3) 
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shaanxi, Xi'an, China; (2) School of Optoelectronics, University of Chinese Academy of Sciences, Beijing, China; (3) Key Laboratory of Space Precision Measurement Technology, Shaanxi, Xi'an, China 
Corresponding author:Ma, Caiwen(cwma@opt.ac.cn)
Source title:IET Image Processing
Abbreviated source title:IET Image Proc.
Volume:17
Issue:6
Issue date:May 11, 2023
Publication year:2023
Pages:1874-1882
Language:English
ISSN:17519659
E-ISSN:17519667
Document type:Journal article (JA)
Publisher:John Wiley and Sons Inc
Abstract:<div data-language="eng" data-ev-field="abstract">Medical image segmentation remains particularly challenging for complex and low-contrast anatomical structures, especially in brain MRI glioma segmentation. Gliomas appear with extensive heterogeneity in appearance and location on brain MR images, making robust tumour segmentation extremely challenging and leads to highly variable even in manual segmentation. U-Net has become the de facto standard in medical image segmentation tasks with great success. Previous researches have proposed various U-Net-based 2D Convolutional Neural Networks (2D-CNN) and their 3D variants, called 3D-CNN-based architectures, for capturing contextual information. However, U-Net often has limitations in explicitly modelling long-term dependencies due to the inherent locality of convolution operations. Inspired by the recent success of natural language processing transformers in long-range sequence learning, a multi-view 2D U-Nets with transformer (TransMVU) method is proposed, which combines the advantages of transformer and 2D U-Net. On the one hand, the transformer encodes the tokenized image patches in the CNN feature map into an input sequence for extracting global context for global feature modelling. On the other hand, multi-view 2D U-Nets can provide accurate segmentation with fewer parameters than 3D networks. Experimental results on the BraTS20 dataset demonstrate that our model outperforms state-of-the-art 2D models and classic 3D model.<br/></div> &copy; 2023 The Authors. IET Image Processing published by John Wiley & Sons Ltd on behalf of The Institution of Engineering and Technology.
Number of references:35
Main heading:Image segmentation
Controlled terms:3D modeling - Brain - Convolution - Convolutional neural networks - Magnetic resonance imaging - Medical imaging - Natural language processing systems - Tumors
Uncontrolled terms:Anatomical structures - Brain MR images - Brain MRI - Brain tumor segmentation - Images segmentations - Low contrast - Medical image segmentation - Medical images processing - Multi-views - Tumor segmentation
Classification code:461.1  Biomedical Engineering - 461.2  Biological Materials and Tissue Engineering - 701.2  Magnetism: Basic Concepts and Phenomena - 716.1  Information Theory and Signal Processing - 723.2  Data Processing and Image Processing - 746  Imaging Techniques
DOI:10.1049/ipr2.12762
Funding details:  
Funding text:The authors express sincere thanks for the experiments provided by the Photoelectric Tracking and Measurement Technology Laboratory, Xi'an Institute of Optics and Precision Mechanics, CAS.
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
 
<RECORD 188>
 
Accession number:20231113711657
Title:Joint Texture Search and Histogram Redistribution for Hyperspectral Image Quality Improvement    (Open Access)
Authors:Hu, Bingliang (1); Chen, Junyu (1, 2); Wang, Yihao (1); Li, Haiwei (1); Zhang, Geng (1) 
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology of Chinese Academy of Sciences, Xi&rsquo;an Institute of Optics and Precision Mechanics of CAS, Xi&rsquo;an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China 
Corresponding author:Zhang, Geng(gzhang@opt.ac.cn)
Source title:Sensors
Abbreviated source title:Sensors
Volume:23
Issue:5
Issue date:March 2023
Publication year:2023
Article number:2731
Language:English
ISSN:14248220
Document type:Journal article (JA)
Publisher:MDPI
Abstract:<div data-language="eng" data-ev-field="abstract">Due to optical noise, electrical noise, and compression error, data hyperspectral remote sensing equipment is inevitably contaminated by various noises, which seriously affect the applications of hyperspectral data. Therefore, it is of great significance to enhance hyperspectral imaging data quality. To guarantee the spectral accuracy during data processing, band-wise algorithms are not suitable for hyperspectral data. This paper proposes a quality enhancement algorithm based on texture search and histogram redistribution combined with denoising and contrast enhancement. Firstly, a texture-based search algorithm is proposed to improve the accuracy of denoising by improving the sparsity of 4D block matching clustering. Then, histogram redistribution and Poisson fusion are used to enhance spatial contrast while preserving spectral information. Synthesized noising data from public hyperspectral datasets are used to quantitatively evaluate the proposed algorithm, and multiple criteria are used to analyze the experimental results. At the same time, classification tasks were used to verify the quality of the enhanced data. The results show that the proposed algorithm is satisfactory for hyperspectral data quality improvement.<br/></div> &copy; 2023 by the authors.
Number of references:32
Main heading:Textures
Controlled terms:Clustering algorithms - Graphic methods - Hyperspectral imaging - Image enhancement - Optical remote sensing
Uncontrolled terms:4d block aggregation - BM4D - Data quality - De-noising - Histogram redistribution - HyperSpectral - Hyperspectral Data - Hyperspectral quality enhancement - Image quality improvements - Quality enhancement
Classification code:741.3  Optical Devices and Systems - 746  Imaging Techniques - 903.1  Information Sources and Analysis
DOI:10.3390/s23052731
Funding details:  Number: 2023-YBGY-390, Acronym: -, Sponsor: -;Number: 42176182, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: YIPA CAS, Sponsor: Youth Innovation Promotion Association of the Chinese Academy of Sciences;
Funding text:This research was funded by Youth Innovation Promotion Association CAS, National Natural Science Foundation of China under Grants (grant No. 42176182) and the Foundation of Shaanxi Province (grant No. 2023-YBGY-390).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold, Green
 
<RECORD 189>
 
Accession number:20230713574413
Title:Design of Schlieren Imaging facility for space combustion science experiment system
Authors:Guo, Huinan (1); Ma, Yingjun (1); Shi, Kui (1) 
Author affiliation:(1) Xi an Institute of Optics and Precision Mechanics of CAS, Xi'an, China 
Corresponding author:Guo, Huinan(guohuinan@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12558
Part number:1 of 1
Issue title:AOPC 2022: Optical Spectroscopy and Imaging
Issue date:2023
Publication year:2023
Article number:1255804
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510662308
Document type:Conference article (CA)
Conference name:2022 Applied Optics and Photonics China: Optical Spectroscopy and Imaging, AOPC 2022
Conference date:December 18, 2022  -  December 19, 2022
Conference location:Virtual, Online, China
Conference code:186190
Sponsor:Chinese Society for Optical Engineering (CSOE)
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">Under the condition of normal gravity, it is difficult to perceive weak changes of microscopic matter caused by material combustion. To meet the requirement of long-Term microgravity environment, it is necessary to establish a combustion science experimental system in space station. For combustion experiment on orbit, a compact optical observation facility is designed in this paper. The facility bases on schlieren imaging, which is able to observe density distribution and flow-field change in combustion experiment. According to the characteristics of space condition, a highly reliable optical lens and mechanical structure are designed. The simulation experimental results show that our design is of high reliability, which is able to be used in complex condition of space combustion experiment.<br/></div> &copy; COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.
Number of references:8
Main heading:Combustion
Controlled terms:Lenses - Microgravity - Microgravity processing - Optical design - Space stations
Uncontrolled terms:Combustion experiments - Combustion science - Condition - Experiment system - Material combustion - Normal gravities - Schlieren - Schlieren imaging - Science experiments - Space science
Classification code:656.1  Space Flight - 656.2  Space Research - 741.1  Light/Optics - 741.3  Optical Devices and Systems - 931.5  Gravitation, Relativity and String Theory
DOI:10.1117/12.2645877
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 190>
 
Accession number:20232114125054
Title:A Sparse Sampling Method in the Two-dimensional Spatial Domain for Sheared-beam Imaging Receiving System    (Open Access)
Authors:Chen, Minglai (1, 2, 3); Ma, Caiwen (1, 2, 3); Luo, Xiujuan (1, 2, 3); Liu, Hui (1, 2, 3); Zhang, Yu (1, 3); Yue, Zelin (1, 2); Zhao, Jing (1, 2) 
Author affiliation:(1) Xi&rsquo;an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi&rsquo;an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Key Laboratory of Space Precision Measurement Technology, Chinese Academy of Sciences, Xi&rsquo;an; 710119, China 
Corresponding author:Ma, Caiwen(cwma@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12601
Part number:1 of 1
Issue title:SPIE-CLP Conference on Advanced Photonics 2022
Issue date:2023
Publication year:2023
Article number:126010M
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510663282
Document type:Conference article (CA)
Conference name:SPIE-CLP Conference on Advanced Photonics 2022
Conference date:November 21, 2022  -  November 23, 2022
Conference location:Virtual, Online, China
Conference code:188033
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">In the imaging of low-orbit moving objects, the number of detector elements in the traditional sheared-beam imaging (SBI) system is too great, which seriously restrict the application of SBI. In this paper, the detector array is sparse in two dimensions. We propose a two-dimensional sparse sampling imaging method, which emits a two-dimensional coherent laser array, carries more spectral information of the target at a time and receives speckle echo signals by a two-dimensional sparse detector array for computational imaging. This method can reduce the number of detector elements many times. Firstly, the principle of two-dimensional sparse sampling with SBI detector array is deduced theoretically. Secondly, a two-dimensional spatial sparse reconstruction algorithm is investigated. The target amplitude product and phase difference carried by each detector array element is estimated using discrete Fourier transform, then the target amplitude product and phase difference of all detector array elements are matched respectively to form a complete target amplitude product surface and phase difference surface. The formulas of phase recovery and amplitude demodulation are derived. Finally, the validity and feasibility of the proposed method are verified by simulation. Compared with the traditional three-beam method, when the number of lasers in emission array is M&times;N, the number of detector elements is reduced to 1/(M-1)/(N-1) of the original without loss of imaging resolution.<br/></div> &copy; 2023 SPIE.
Number of references:19
Main heading:Compressed sensing
Controlled terms:Computational Imaging - Discrete Fourier transforms - Signal detection
Uncontrolled terms:Beam imaging - Computational imaging - Detector arrays - Detector elements - Shear beams - Shear-beam imaging - Sparse sampling - Spatial domains - Two-dimensional - Two-dimensional spatial domain
Classification code:716.1  Information Theory and Signal Processing - 746  Imaging Techniques - 921.3  Mathematical Transformations
DOI:10.1117/12.2666901
Funding details:  Number: 2020JQ-438, Acronym: -, Sponsor: Natural Science Basic Research Program of Shaanxi Province;
Funding text:Project supported by the Natural Science Basic Research Program of Shaanxi (Program No. 2020JQ-438).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Bronze
 
<RECORD 191>
 
Accession number:20232314201509
Title:Review of Reconstruction Methods for Spectral Snapshot Compressive Imaging
Authors:Yuan, Hao (1); Ding, Xiaoming (1, 2); Yan, Qiangqiang (2); Wang, Xiaocheng (1); Li, Yupeng (1); Han, Tingting (1) 
Author affiliation:(1) Tianjin Key Laboratory of Wireless Mobile Communications and Power Transmission, Tianjin Normal University, Tianjin; 300387, China; (2) CAS Key Laboratory of Spectral Imaging Technology, Xi&rsquo;an Institute of Optics and Precision Mechanics, Xi&rsquo;an; 710119, China 
Corresponding author:Ding, Xiaoming(xmding@tjnu.edu.cn)
Source title:Lecture Notes in Electrical Engineering
Abbreviated source title:Lect. Notes Electr. Eng.
Volume:872 LNEE
Part number:1 of 3
Issue title:Communications, Signal Processing, and Systems - Proceedings of the 11th International Conference on Communications, Signal Processing, and Systems, Vol. 1
Issue date:2023
Publication year:2023
Pages:313-322
Language:English
ISSN:18761100
E-ISSN:18761119
ISBN-13:9789819926527
Document type:Conference article (CA)
Conference name:11th International Conference on Communications, Signal Processing, and Systems, CSPS 2022
Conference date:July 23, 2022  -  July 24, 2022
Conference location:Changbaishan, China
Conference code:292729
Publisher:Springer Science and Business Media Deutschland GmbH
Abstract:<div data-language="eng" data-ev-field="abstract">Snapshot compressive imaging (SCI) uses a 2D sensor to obtain higher dimensional data and then reconstructs the underlying high-dimension data by elaborate algorithms. Applying SCI to capture hyperspectral images is known as spectral SCI. Although this technique has been proposed for more than a decade, it has not been widely used, mainly because its reconstruction accuracy and reconstruction speed are not yet satisfactory, which is the research focus on spectral SCI. This paper investigates the literatures on reconstruction methods of spectral SCI, mainly involving coded aperture optimization, model-based reconstruction algorithms and deep learning-based reconstruction algorithms. In this paper, we also provide a summary of studies on noise modeling and denoising for reconstructed spectral SCI data.<br/></div> &copy; 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.
Number of references:43
Main heading:Deep learning
Uncontrolled terms:Coded apertures - Compressive imaging - High dimensional data - High-dimension data - HyperSpectral - Reconstruction accuracy - Reconstruction algorithms - Reconstruction method - Reconstruction speed - Research focus
Classification code:461.4  Ergonomics and Human Factors Engineering
DOI:10.1007/978-981-99-2653-4_39
Funding details:  Number: LSIT202004W, Acronym: -, Sponsor: -;Number: 2021KJ182, Acronym: -, Sponsor: -;Number: 20JCYBJC00300, Acronym: -, Sponsor: Natural Science Foundation of Shanghai;Number: 61901301,62001327,62001328, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2021JQ-323, Acronym: -, Sponsor: Natural Science Foundation of Shanxi Province;
Funding text:This work was supported by the National Natural Science Foundation of China (NSFC) (62001328, 62001327, 61901301), Scientific Research Project of Tianjin Educational Committee (2021KJ182), the Natural Science Foundation of Tianjin Municipality (20JCYBJC00300), Open Fund of CAS Key Laboratory of Spectral Imaging Technology (No. LSIT202004W) and Natural Science Foundation of Shanxi Province (2021JQ-323).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 192>
 
Accession number:20231714015953
Title:Performance Analysis of STAR-IRS Aided NOMA Short-Packet Communications With Statistical CSI
Authors:Xu, Jing (1); Yuan, Lei (1); Yang, Nan (1); Yang, Nan (2); Guo, Yi (3) 
Author affiliation:(1) School of Information Science and Engineering, Lanzhou University, Lanzhou, Gansu, China; (2) School of Engineering, Australian National University, Canberra, Australia; (3) Xi&#x0027;an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi&#x0027;an, China 
Source title:IEEE Transactions on Vehicular Technology
Abbreviated source title:IEEE Trans. Veh. Technol.
Issue date:2023
Publication year:2023
Pages:1-6
Language:English
ISSN:00189545
E-ISSN:19399359
CODEN:ITVTAB
Document type:Article in Press
Publisher:Institute of Electrical and Electronics Engineers Inc.
Abstract:<div data-language="eng" data-ev-field="abstract">We analyze the benefits of simultaneous transmitting and reflecting intelligent reflecting surfaces (STAR-IRSs) for short-packet communications (SPC) with non-orthogonal multiple access (NOMA) and statistical channel state information towards ultra-reliable and low-latency communications. Considering Rician fading and energy splitting protocol, we analyze the performance of STAR-IRS aided NOMA SPC systems with continuous and discrete phase shifts. We first derive new closed-form expressions for the average block error rate (BLER) and diversity order in the finite signal-to-noise ratio (SNR) regime. We then determine the relationship among the average BLER, power allocation, blocklength, and transmission and reflection coefficients. Finally, Monte Carlo simulations are used to verify our theoretical analysis and examine the optimal transmission and reflection coefficients that minimize the common blocklength in the considered system under reliability constraints.<br/></div> IEEE
Main heading:Signal to noise ratio
Controlled terms:Channel state information - Communication channels (information theory) - Intelligent systems - Monte Carlo methods - Multiple access interference - Reliability analysis - Stars
Uncontrolled terms:Diversity order - Downlink - Interference - Multiple access - Non-orthogonal - Non-orthogonal multiple access - Reflecting surface - Resource management - Rician channels - Short packet communication  - Simultaneous transmitting and reflecting intelligent reflecting surface
Classification code:657.2  Extraterrestrial Physics and Stellar Phenomena - 716.1  Information Theory and Signal Processing - 722.3  Data Communication, Equipment and Techniques - 723.4  Artificial Intelligence - 922.2  Mathematical Statistics
DOI:10.1109/TVT.2023.3266830
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 193>
 
Accession number:20231513873233
Title:Investigation of single-shot high-speed photography based on spatial frequency multiplexing
Authors:Li, Hang (1, 2, 3); Li, YaHui (1, 3); Wang, Xing (1, 3); Tian, Jinshou (1, 3) 
Author affiliation:(1) Xi&rsquo;an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi&rsquo;an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan; 030006, China 
Corresponding author:Li, YaHui(liyahui@opt.ac.cn)
Source title:Journal of the Optical Society of America A: Optics and Image Science, and Vision
Abbreviated source title:J Opt Soc Am A
Volume:40
Issue:3
Issue date:March 2023
Publication year:2023
Pages:521-529
Language:English
ISSN:10847529
E-ISSN:15208532
CODEN:JOAOD6
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">The frequency recognition algorithm for multiple exposures (FRAME) is a spatial frequency multiplexing method that enables high-speed videography with high spatial resolution across a wide field of view and high temporal resolution up to femtoseconds. The criterion to design encoded illumination pulses is an essential factor that affects the sequence depth and reconstruction accuracy of FRAME but was not previously discussed. When the spatial frequency is exceeded, the fringes on digital imaging sensors can become distorted. To exploit the Fourier domain for FRAME with deep sequences and avoid fringe distortion, the maximum Fourier map for sequence arrangement was determined to be a diamond shape. The maximum axial frequency should be a quarter of the sampling frequency of digital imaging sensors. Based on this criterion, the performances of reconstructed frames were theoretically investigated by considering arrangement and filtering methods. To ensure optimal and uniform interframe quality, the frames near the zero frequency should be removed and optimized super-Gaussian filters should be employed. Experiments were conducted flexibly with a digital mirror device to generate illumination fringes. Following these suggestions, the movement of a water drip dropping on a water surface was captured with 20 and 38 frames with uniform interframe quality. The results prove the effectiveness of the proposed methods to improve the reconstruction accuracy and promote the development of FRAME with deep sequences.<br/></div> &copy; 2023 Optica Publishing Group.
Number of references:31
Main heading:Video recording
Controlled terms:High speed photography
Uncontrolled terms:Digital imaging sensors - High spatial resolution - High speed videography - Highspeed photography - Inter-frame - Multiple exposure - Recognition algorithm - Reconstruction accuracy - Single-shot - Spatial-frequency multiplexing
Classification code:716.4  Television Systems and Equipment - 742.1  Photography
DOI:10.1364/JOSAA.480778
Funding details:  Number: CXJJ-21S006, Acronym: -, Sponsor: -;Number: GJJSTD20220006, Acronym: CAS, Sponsor: Chinese Academy of Sciences;
Funding text:Funding. Scientific Instrument Developing Project of the Chinese Academy of Sciences (GJJSTD20220006); Science Foundation of the Chinese Academy of Sciences (CXJJ-21S006).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 194>
 
Accession number:20231713945948
Title:Analysis of Detection Capability of Space Target Based on Event Camera
Title of translation:&#31354; &#38388; &#30446; &#26631; &#20107; &#20214; &#30456; &#26426; &#25506; &#27979; &#33021; &#21147; &#20998; &#26512;
Authors:Lv, Yuanyuan (1, 2, 3); Liu, Zhaohui (1, 3); Qiao, Wenlong (1, 2, 3); Zhou, Liang (1, 3); Sun, Xiaoxiao (1, 2, 3); Chen, Peiquan (1, 2, 3); Li, Wenkai (1, 2, 3); Zhang, Haiyang (1, 2, 3) 
Author affiliation:(1) Xi&prime;an Institute of Optics and Precision Mechanics of CAS, Xi&prime;an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Key Laboratory of Space Precision Measurement Technology, Chinese Academy of Sciences, Xi&prime;an; 710119, China 
Corresponding author:Zhou, Liang(zhouliang@opt.ac.cn)
Source title:Guangzi Xuebao/Acta Photonica Sinica
Abbreviated source title:Guangzi Xuebao
Volume:52
Issue:2
Issue date:February 2023
Publication year:2023
Article number:0211001
Language:Chinese
ISSN:10044213
CODEN:GUXUED
Document type:Journal article (JA)
Publisher:Chinese Optical Society
Abstract:<div data-language="eng" data-ev-field="abstract">Event cameras are increasingly popular in the field of artificial vision systems as a new type of biological vision sensor. Different from traditional detectors&#65292;which capture images at a fixed rate&#65292;event cameras are inspired by biological retinas and respond asynchronously and independently to changes in the brightness of each pixel in the scene. The pixel unit independently detects the change range of the logarithmic value of the light intensity. When it exceeds the preset threshold&#65292;the pixel unit is activated and reads out the relevant information of this activation through an external unit&#65292;generally including the position of the pixel&#65292;activation time&#65292;polarity&#65292;and other information. When read out&#65292;these information are packaged into a data packet&#65292;which is called an"event". After the event is output&#65292;the photosensitive pixel unit will return to the inactive state and re-monitor the changes in the outside light intensity. This working principle makes event cameras offer attractive properties compared to traditional cameras&#65306;large dynamic range&#65288;140 dB vs. 60 dB&#65289;&#65292;high temporal resolution&#65288;in the order of &micro;s&#65289;&#65292;low latency&#65292;low power consumption&#65292;and high pixel bandwidth&#65288;in the order of kHz&#65289; resulting in reduced motion blur. Hence&#65292;Event cameras are widely used in spatial vision problems such as pose estimation&#65292;3D reconstruction&#65292;and SLAM. With the development of the event camera&#65292;it has been gradually applied in the field of space target detection&#65292;and has shown great potential. Event cameras provide a new solution for monitoring satellites and stars for space situational awareness. However&#65292;there are few research on space situational awareness based on event cameras. Aiming at the problem of space target detection based on event cameras&#65292;we clarify the mechanism of event camera for space target observation&#65292; and systematically analyze the influencing factors that affect the detection sensitivity of space target based on event camera. Apart from theoretical analysis&#65292;we also build a detection sensitivity model of space target based on event cameras. As described by the proposed sensitivity model&#65292;the optical system parameters of the observation system&#65292;such as the clear aperture of the observation optical system&#65292;the diameter of the dispersion spot caused by the optical system&#65292;the transmittance of the optical system&#65292;the photoelectric conversion capability of the camera&#65292;and the atmospheric turbulence&#65292;determine the limit observation capability of the system. As the threshold of the event camera increases&#65292;the detection sensitivity of the system &#65288;characterized by limit magnitude&#65289;decreases linearly. Besides&#65292;we performed field experiments with telescopes using the CMOS camera and event camera. First&#65292;we conducted an experiment to observe the planetary based on the event camera. The observation results show that the event camera can be applied to space target observation. Compared with the traditional CMOS camera&#65292;the event camera has a lower spatial resolution&#65292;but the characteristics of its low bandwidth communication&#65292;low weight&#65292;low power&#65292;and high speed make it fully meet the harsh requirements of sensors in the aerospace field&#65292;and have great application prospects in space target monitoring. In order to explore the impact of the event camera threshold setting on the detection results&#65292;we observed Polaris at different thresholds&#65292;and the results show that the low threshold makes the signal in the image more obvious but more noise events. When the weak target is observed&#65292;the too-low threshold is easy to cause the indistinguishability of noise events and signal events. When the threshold is raised&#65292;the detection sensitivity of the system decreases&#65292;and the signal is not obvious&#65292;which affects the signal recognition. Therefore&#65292;when using the event camera for space target observation&#65292;the selection of the threshold value is extremely important&#65292;not only to ensure high detection sensitivity&#65292;but also to avoid the generation of a large number of noise events&#65292;which will affect the signal recognition. So establishing a sensitivity model of space target detection based on event camera can provide theoretical guidance for experiments. For the observation system we built&#65292;we selected five celestial objects that are easier to distinguish in the sky to calibrate the sensitivity model. The fitting results show good linearity with correlation coefficient greater than 0.95. After that&#65292;we chose three other celestial bodies to verify the model. The relative error was less than 3%&#65292;so the model we built is accurate. Event cameras are revolutionary sensors that offer many advantages over traditional&#65292;frame-based cameras. Their characteristics&#65292;such as low latency&#65292;low power&#65292;high speed and high dynamic range&#65292;make event cameras have a large potential for space target detection. In the meantime&#65292;many challenges remain ahead. By conducting theoretical analysis and experimental verification&#65292;this paper obtains the sensitivity model of space target detection based on event camera. We hope it can provide a few theoretical guidance for space target observation and other related research based on event camera.<br/></div> &copy; 2023 Chinese Optical Society. All rights reserved.
Number of references:31
Main heading:Chemical activation
Controlled terms:Atmospheric turbulence - Biomimetics - Cameras - Optical systems - Photoelectricity - Pixels
Uncontrolled terms:Bio-inspired vision - Detection sensitivity - Event camera - Magnitude - Noise events - Sensitivity - Sensitivity model - Space target observation - Space targets - Targets detection
Classification code:443.1  Atmospheric Properties - 461.8  Biotechnology - 461.9  Biology - 631.1  Fluid Flow, General - 701.1  Electricity: Basic Concepts and Phenomena - 741.1  Light/Optics - 741.3  Optical Devices and Systems - 742.2  Photographic Equipment - 802.2  Chemical Reactions - 804  Chemical Products Generally
Numerical data indexing:Decibel 1.40E+02dB, Decibel 6.00E+01dB, Percentage 3.00E+00%
DOI:10.3788/gzxb20235202.0211001
Funding details:  Number: 61805275, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:item&#65306; National Natural Science Foundation of China&#65288; No. 61805275&#65289;
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 195>
 
Accession number:20231914056478
Title:Recalibrating Features and Regression for Oriented Object Detection    (Open Access)
Authors:Chen, Weining (1, 2, 3); Miao, Shicheng (1, 2); Wang, Guangxing (1, 2); Cheng, Gong (1, 2) 
Author affiliation:(1) School of Automation, Northwestern Polytechnical University, Xi&rsquo;an; 710129, China; (2) Research & Development Institute of Northwestern Polytechnical University in Shenzhen, Shenzhen; 518057, China; (3) Xi&rsquo;an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi&rsquo;an; 710119, China 
Corresponding author:Cheng, Gong(gcheng@nwpu.edu.cn)
Source title:Remote Sensing
Abbreviated source title:Remote Sens.
Volume:15
Issue:8
Issue date:April 2023
Publication year:2023
Article number:2134
Language:English
E-ISSN:20724292
Document type:Journal article (JA)
Publisher:MDPI
Abstract:<div data-language="eng" data-ev-field="abstract">The objects in remote sensing images are normally densely packed, arbitrarily oriented, and surrounded by complex backgrounds. Great efforts have been devoted to developing oriented object detection models to accommodate such data characteristics. We argue that an effective detection model hinges on three aspects: feature enhancement, feature decoupling for classification and localization, and an appropriate bounding box regression scheme. In this article, we instantiate the three aspects on top of the classical Faster R-CNN, with three novel components proposed. First, we propose a weighted fusion and refinement (WFR) module, which adaptively weighs multi-level features and leverages the attention mechanism to refine the fused features. Second, we decouple the RoI (region of interest) features for the subsequent classification and localization via a lightweight affine transformation-based feature decoupling (ATFD) module. Third, we propose a post-classification regression (PCR) module for generating the desired quadrilateral bounding boxes. Specifically, PCR predicts the precise vertex location on each side of a predicted horizontal box, by simply learning the following: (i) classify the discretized regression range of the vertex, and (ii) revise the vertex location with an offset. We conduct extensive experiments on the DOTA, DIOR-R, and HRSC2016 datasets to evaluate our method.<br/></div> &copy; 2023 by the authors.
Number of references:43
DOI:10.3390/rs15082134
Funding details:  Number: 2021B1515020072, Acronym: -, Sponsor: Basic and Applied Basic Research Foundation of Guangdong Province;
Funding text:This research was funded by the Guangdong Basic and Applied Basic Research Foundation under Grant 2021B1515020072.
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
 
<RECORD 196>
 
Accession number:20230613537950
Title:Research on the Quantitative Process Technology of Tightening Torque of Optical lens Pressure ring
Authors:Fu, Xihong (1, 2); Kang, Shifa (1); Jia, Xin (1); Li, Shuo (1); Cao, Mingqiang (1); Ji, Bindong (1); Zhao, Yue (1); Shi, Yuanyuan (1) 
Author affiliation:(1) Xi'an Institute of Optics and Precision Mechanics of CAS, China; (2) University of Chinese Academy of Sciences, China 
Corresponding author:Fu, Xihong(fuxh@opt.ac.cn)
Source title:Proceedings of SPIE - The International Society for Optical Engineering
Abbreviated source title:Proc SPIE Int Soc Opt Eng
Volume:12507
Part number:1 of 1
Issue title:Advanced Optical Manufacturing Technologies and Applications 2022; and 2nd International Forum of Young Scientists on Advanced Optical Manufacturing, AOMTA and YSAOM 2022
Issue date:2023
Publication year:2023
Article number:125071E
Language:English
ISSN:0277786X
E-ISSN:1996756X
CODEN:PSISDG
ISBN-13:9781510661264
Document type:Conference article (CA)
Conference name:Advanced Optical Manufacturing Technologies and Applications 2022, AOMTA 2022 and 2nd International Forum of Young Scientists on Advanced Optical Manufacturing, YSAOM 2022
Conference date:July 29, 2022  -  July 31, 2022
Conference location:Changchun, China
Conference code:186036
Sponsor:Changchun Institute of Optics, Fine Mechanics and Physics, CAS; Changchun University of Science and Technology; Changchun University of Technology; et al.; Jilin University; University of Shanghai for Science and Technology
Publisher:SPIE
Abstract:<div data-language="eng" data-ev-field="abstract">The axial compact fixing position of the optical element is mainly carried out in the form of tightening the compression ring in the optical lens assembly process. Most of the existing compression ring tightening methods use forceps and other general press ring tightening tools, the degree of tightening of the pressure ring when used mainly depends on the experience and feel of the assembler, cannot quantify the compression ring tightening torque.In order to solve the above technical problems, the research topic of optical lens compression moment quantification process technology is proposed. Based on the principle of strain sensor, a special digital explicit compression moment device was successfully developed. According to the mass production project of XX optical lenses, the test scheme of the tightening moment of each lens press is designed, and multiple compression ring tightening tests are carried out using a special digital explicit compression moment device, and the corresponding change relationship between the compression moment range of the whole lens and the lens surface type (RMS) is summarized. According to GB/T34516-2017 "Spacecraft Vibration Test Method", the random vibration test method in the vertical direction of "sweep-vibration-sweep frequency" was used to complete the compression moment tightening performance and reliability verification. The test results are shown that the characteristic sweep curve of the optical lens before and after the vibration has not changed, the modality has always remained stable, the lens shape (RMS) remains unchanged, the optical lens is not loosened, the digital explicit compression moment device developed meets the technical requirements of the optical lens assembly process, and the compression ring tightening torque is quantified, which further improves the assembly quality reliability and assembly efficiency.<br/></div> &copy; 2023 SPIE.
Number of references:8
Main heading:Vibration analysis
Controlled terms:Assembly - Optical instrument lenses - Presses (machine tools) - Torque
Uncontrolled terms:Assembly process - Compression rings - Optical lens - Pressure ring - Process Technologies - Research topics - RMS - Tightening torque - Vibration - Vibration test method
Classification code:603.1  Machine Tools, General - 741.3  Optical Devices and Systems - 931.2  Physical Properties of Gases, Liquids and Solids
DOI:10.1117/12.2655687
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 197>
 
Accession number:20231714009506
Title:Efficient dense attention fusion network with channel correlation loss for road damage detection    (Open Access)
Authors:Liu, Zihan (1); Jing, Kaifeng (1); Yang, Kai (2, 3); Zhang, ZhiJun (2); Li, Xijie (2, 3, 4) 
Author affiliation:(1) AmazingX Academy, FoShan, China; (2) Wuhan University of Technology, School of Computer Science and Artificial Intelligence, Wuhan, China; (3) Sanya Science and Education Innovation Park of Wuhan University of Technology, Sanya, China; (4) Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an, China 
Corresponding author:Li, Xijie(lixijie@opt.ac.cn)
Source title:IET Intelligent Transport Systems
Abbreviated source title:IET Intel. Transport Syst.
Issue date:2023
Publication year:2023
Language:English
ISSN:1751956X
E-ISSN:17519578
Document type:Article in Press
Publisher:John Wiley and Sons Inc
Abstract:<div data-language="eng" data-ev-field="abstract">Road&nbsp;damage detection (RDD) is critical to society's safety and the efficient allocation of resources. Most road damage detection methods which directly adopt various object detection models face some significant challenges due to the characteristics of the RDD task. First, the damaged objects in the road images are highly diverse in scales and difficult to differentiate, making it more challenging than other tasks. Second, existing methods neglect the relationship between the feature distribution and model structure, which makes it difficult for optimization. To address these challenges, this study proposes an efficient dense attention fusion network with channel correlation loss for road damage detection. First, the K-Means++ algorithm is applied for data preprocessing to optimize the initial cluster centers and improve the model detection accuracy. Second, a dense attention fusion module is proposed to learn spatial-spectral attention to enhance multi-scale fusion features and improve the ability of the model to detect damage areas at different scales. Third, the channel correlation loss is adopted in the class prediction process to maintain the separability of intra and inter-class. The experimental results on the collected RDDA dataset and RDD2022 dataset show that the proposed method achieves state-of-the-art performance.<br/></div> &copy; 2023 The Authors. IET Intelligent Transport Systems published by John Wiley & Sons Ltd on behalf of The Institution of Engineering and Technology.
Number of references:66
Main heading:Damage detection
Controlled terms:Intelligent systems - K-means clustering - Motor transportation - Object detection - Roads and streets - Traffic control
Uncontrolled terms:Channel correlation - Correlation loss - Detection methods - Detection models - Detection tasks - Efficient allocations - Images processing - Objects detection - Road damage - Road safety
Classification code:406.2  Roads and Streets - 723.2  Data Processing and Image Processing - 723.4  Artificial Intelligence - 903.1  Information Sources and Analysis
DOI:10.1049/itr2.12369
Funding details:  Number: 61772510, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2021KF0032, Acronym: WUT, Sponsor: Wuhan University of Technology;Number: WUT: 213110001, Acronym: -, Sponsor: Fundamental Research Funds for the Central Universities;
Funding text:This work is supported in part by the National Natural Science Foundation of China under Grant 61772510, and in part by the Fundamental Research Funds for the Central Universities under Grant WUT: 213110001. Sanya Science and Education Innovation Park of Wuhan University of Technology (Grant No: 2021KF0032).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
 
<RECORD 198>
 
Accession number:20231914070311
Title:Direct sampling of ultrashort laser pulses using third-harmonic generation with perturbation in ambient air
Authors:Huang, Pei (1); Yuan, Hao (1, 2); Cao, Huabao (1, 2); Wang, Hushan (1, 2); Wang, Xianglin (1, 2); Wang, Yishan (1, 2); Zhao, Wei (1, 2); Fu, Yuxi (1, 2) 
Author affiliation:(1) Center for Attosecond Science and Technology, State Key Laboratory of Transient Optics and Photonics, Xi&rsquo;an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Shaanxi, Xi&rsquo;an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China 
Corresponding author:Fu, Yuxi(fuyuxi@opt.ac.cn)
Source title:Optics Letters
Abbreviated source title:Opt. Lett.
Volume:48
Issue:8
Issue date:April 15, 2023
Publication year:2023
Pages:2154-2157
Language:English
ISSN:01469592
E-ISSN:15394794
CODEN:OPLEDP
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">We propose a simple and robust all-optical pulse sampling method to characterize the temporal profiles of ultrashort laser pulses. The method is based on a third-harmonic generation (THG) process with perturbation in ambient air, which requires no retrieval algorithm and can be potentially applied to electric field measurement. The method has been successfully used to characterize multi-cycle and few-cycle pulses with a spectral range from 800 nm to 2200 nm. Considering the broad phase-matching bandwidth of THG and extremely low dispersion of air, this method is suitable for ultrashort pulse characterization even for single-cycle pulses in the near- to mid-infrared range. Thus, the method provides a reliable and highly accessible approach for pulse measurement in ultrafast optics research.<br/></div> &copy; 2023 Optica Publishing Group.
Number of references:32
Main heading:Harmonic generation
Controlled terms:Electric field measurement - Electric fields - Phase matching - Ultrashort pulses
Uncontrolled terms:All optical - Ambient air - Direct sampling - Electric-field measurement - Generation process - Retrieval algorithms - Sampling method - Simple++ - Temporal profile - Third-harmonic generation
Classification code:701.1  Electricity: Basic Concepts and Phenomena - 713  Electronic Circuits - 942.2  Electric Variables Measurements
Numerical data indexing:Size 8.00E-07m to 2.20E-06m
DOI:10.1364/OL.485665
Funding details:  Number: J21-029-III, Acronym: -, Sponsor: -;Number: S19-020-III, Acronym: -, Sponsor: -;Number: 202005YK01, Acronym: -, Sponsor: -;Number: 12104501,61690222,62175256,92050107, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: J20-021-III, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: WCH2021002, Acronym: YIPA CAS, Sponsor: Youth Innovation Promotion Association of the Chinese Academy of Sciences;Number: 2019JCW-03, Acronym: -, Sponsor: Natural Science Basic Research Program of Shaanxi Province;
Funding text:Funding. National Natural Science Foundation of China (12104501, 61690222, 62175256, 92050107); Natural Science Basic Research Program of Shaanxi (2019JCW-03); Science and Technology Program of Xi&rsquo;an (202005YK01); Major Science and Technology Infrastructure Pre-research Program of the CAS (J20-021-III); Key Deployment Research Program of XIOPM (S19-020-III); Innovation team in Shaanxi Province (J21-029-III); Youth Innovation Promotion Association XIOPM-CAS (WCH2021002).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 199>
 
Accession number:20230813609470
Title:An Edge Computing Algorithm Based on Multi-Level Star Sensor Cloud    (Open Access)
Authors:Ren, Siyu (1); Qiu, Shi (2); Cheng, Keyang (3) 
Author affiliation:(1) The Open University of Chengdu, Major in Computer Application, Chengdu; 610000, China; (2) Xi&rsquo;an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi&rsquo;an; 710119, China; (3) School of Computer Science and Communication Engineering, Jiangsu University, Zhenjiang; 212013, China 
Corresponding author:Qiu, Shi(qiushi@opt.ac.cn)
Source title:CMES - Computer Modeling in Engineering and Sciences
Abbreviated source title:CMES Comput. Model. Eng. Sci.
Volume:136
Issue:2
Issue date:2023
Publication year:2023
Pages:1643-1659
Language:English
ISSN:15261492
E-ISSN:15261506
Document type:Journal article (JA)
Publisher:Tech Science Press
Abstract:<div data-language="eng" data-ev-field="abstract">Star sensors are an important means of autonomous navigation and access to space information for satellites. They have been widely deployed in the aerospace field. To satisfy the requirements for high resolution, timeliness, and confidentiality of star images, we propose an edge computing algorithm based on the star sensor cloud. Multiple sensors cooperate with each other to form a sensor cloud, which in turn extends the performance of a single sensor. The research on the data obtained by the star sensor has very important research and application values. First, a star point extraction model is proposed based on the fuzzy set model by analyzing the star image composition, which can reduce the amount of data computation. Then, a mapping model between content and space is constructed to achieve low-rank image representation and efficient computation. Finally, the data collected by the wireless sensor is delivered to the edge server, and a different method is used to achieve privacy protection. Only a small amount of core data is stored in edge servers and local servers, and other data is transmitted to the cloud. Experiments show that the proposed algorithm can effectively reduce the cost of communication and storage, and has strong privacy.<br/></div> &copy; 2023 Tech Science Press. All rights reserved.
Number of references:55
Main heading:Mapping
Controlled terms:Digital storage - Edge computing - Fuzzy sets - Image representation - Stars
Uncontrolled terms:Aerospace field - Autonomous navigation - Computing algorithms - Edge computing - Edge server - Multilevels - Sensor cloud - Star images - Star sensors - Star-sensing
Classification code:405.3  Surveying - 657.2  Extraterrestrial Physics and Stellar Phenomena - 722.1  Data Storage, Equipment and Techniques - 722.4  Digital Computers and Systems - 723.4  Artificial Intelligence
DOI:10.32604/cmes.2023.025248
Funding details:  Number: 2021KJXX-61, Acronym: -, Sponsor: -;Number: A2206, Acronym: ZJU, Sponsor: Zhejiang University;Number: -, Acronym: -, Sponsor: State Key Laboratory of Computer Aided Design and Computer Graphics;
Funding text:Funding Statement: This work is supported by Science and Technology Rising Star of Shaanxi Youth (No. 2021KJXX-61); The Open Project Program of the State Key Lab of CAD&CG, Zhejiang University (No. A2206).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
 
<RECORD 200>
 
Accession number:20230061424
Title:Stress-Induced Yb-Doped Large-Mode-Area Polarization-Maintaining Microstructured Fibers with Deviation of the Single-Mode Transmission Band and Delocalization of Higher-Order Modes
Authors:Ma, Yuan (1, 2); Chen, Chao (1, 2); Wan, Rui (1, 2); Wang, Pengfei (1, 2) 
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi&rsquo;an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences (CAS), Xi&rsquo;an; 710119, China; (2) Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing; 100049, China 
Corresponding author:Wang, Pengfei(pfwang@opt.ac.cn)
Source title:SSRN
Issue date:February 19, 2023
Publication year:2023
Language:English
ISSN:15565068
Document type:Preprint (PP)
Publisher:SSRN
Abstract:<div data-language="eng" data-ev-field="abstract">The nonlinear effects and laser-induced optical and thermal damage in optical fibers, together with the limitations of beam quality and mode-field area, restrict the power scaling-up of single-mode output for developing high-power fiber lasers in the kilowatt and above range. The design of photonic crystal fibers (PCFs) with large mode areas is an effective way to address this problem. In this paper, the demands and challenges of designing very large-mode-area (VLMA-) PCFs are discussed, including the overall fiber structure design and property simulation, especially the precise definition of single-mode operating conditions of VLMA-PCFs. Finally, an advanced polarization-maintaining, Yb-doped, PCF structure with a large mode area realized by introducing both leakage channels and higher order mode-filtering units is proposed and analyzed theoretically, for which a maximum core diameter of 101 &mu;m and single-mode field diameter of 76.33 &mu;m at 1064 nm and a birefringence value &gt;10-4 orders of magnitude are achieved.<br/></div> &copy; 2023, The Authors. All rights reserved.
Number of references:30
Main heading:Fiber amplifiers
Controlled terms:Birefringence - Crystal whiskers - Fiber lasers - Finite element method - Microstructure - Photonic crystal fibers - Polarization - Polarization-maintaining fiber
Uncontrolled terms:High order mode - Higher-order-mode - Large mode area - Microstructured fibre - Optical fibers amplifiers - Photonic-crystal fiber - Polarization maintaining - Single mode - Stress induced birefringence - Yb-doped
Classification code:741.1  Light/Optics - 741.1.2  Fiber Optics - 744.4  Solid State Lasers - 921.6  Numerical Methods - 933.1.1  Crystal Lattice - 951  Materials Science
Numerical data indexing:Size 1.01E-04m, Size 1.064E-06m, Size 7.633E-05m
DOI:10.2139/ssrn.4364068
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.Preprint ID:4364068
Preprint source website:https://papers.ssrn.com/sol3/papers.cfm
Preprint ID type:SSRN
 
 
<RECORD 201>
 
Accession number:20232614298852
Title:Weldability improvement of immiscible polycarbonate/GFRP by femtosecond laser surface treatment
Authors:Liu, Minqiu (1, 2); Chen, Yewang (2); Zhang, Ying (2, 3); Zhao, Junqing (2); Wang, Dongyang (2); Li, Chunbo (2); Pei, Jihong (1); Ouyang, Deqin (2); Ruan, Shuangchen (2) 
Author affiliation:(1) College of Electronic Information Engineering, Shenzhen University, Shenzhen; 518060, China; (2) Key Laboratory of Advanced Optical Precision Manufacturing Technology of Guangdong Higher Education Institutes, Shenzhen Technology University, Shenzhen; 518118, China; (3) Shaanxi Key Laboratory of Artificially-Structured Functional Materials and Devices, Xian; 710075, China 
Corresponding author:Ouyang, Deqin(ouyangdeqin@sztu.edu.cn)
Source title:Journal of Materials Processing Technology
Abbreviated source title:J Mater Process Technol
Volume:318
Issue date:September 2023
Publication year:2023
Article number:118033
Language:English
ISSN:09240136
CODEN:JMPTEF
Document type:Journal article (JA)
Publisher:Elsevier Ltd
Abstract:<div data-language="eng" data-ev-field="abstract">Poor miscibility is an important reason for the non-weldable performance of most dissimilar polymers and their composites, and traditional surface treatments cannot effectively improve the weldability of dissimilar polymers. Therefore, the non-weldability of dissimilar polymers is one of the important factors that limit the application of polymers and their composites. We proposed a surface modification scheme of laser ablation or etching to improve the weldability of immiscible polymers effectively. Experimental studies on femtosecond ultraviolet (UV) laser ablation/etching, mid-infrared laser transmission welding (LTW), and related characterization and mechanical tests were carried out. The experimental results showed that laser ablation induced the deposition of abundant polar oxygen-containing groups on the surface of polycarbonate (PC), which improved the miscibility of PC and polyamide 66 with a glass fiber volume ratio of 30 % (PA66GF30) and reduced the weak boundary layer (WBL), thereby improving their chemical bonding performance. Using the compatibilization mechanism induced by laser ablation, the bonding strength of the PC/PA66GF30 joint obtained by LTW was 13.7 MPa, which was much higher than that of the untreated joint (1.4 MPa). However, the grooves generated by laser etching could induce macro-anchoring effect of the hybrid joint. Based on the compatibilization mechanism and macro-anchoring effect, with the selection of appropriate welding power and etching parameters, the bonding strength of the PC/PA66GF30 joint was further increased to 29.7 MPa. This work has demonstrated the feasibility of laser surface treatment (especially etching) to significantly improve the welding strength of immiscible polymers and their composites.<br/></div> &copy; 2023 The Authors
Number of references:51
Main heading:Solubility
Controlled terms:Boundary layers - Chemical bonds - Etching - Femtosecond lasers - Laser ablation - Laser pulses - Polycarbonates - Welding
Uncontrolled terms:Anchoring effects - Application of polymers - Bonding strength - Immiscible polymer - Laser etching - Laser surface treatment - Laser transmission welding - Lasers ablations - Performance - Surface-modification
Classification code:538.2  Welding - 641.2  Heat Transfer - 744.1  Lasers, General - 744.8  Laser Beam Interactions - 801.4  Physical Chemistry - 802.2  Chemical Reactions - 815.1.1  Organic Polymers
Numerical data indexing:Percentage 3.00E+01%, Pressure 1.37E+07Pa, Pressure 1.40E+06Pa, Pressure 2.97E+07Pa
DOI:10.1016/j.jmatprotec.2023.118033
Funding details:  Number: 2022YFB3605800, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;Number: 61905146, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;
Funding text:This work was supported by the National Key Research and Development Program of China [grant numbers 2022YFB3605800], the National Natural Science Funds [grant numbers 62105225], the Fundamental Research Funds of Shaanxi Key Laboratory of Artificially-Structured Functional Materials and Devices [grant numbers AFMD-KFJJ-21213], the Shenzhen key Project for Technology Development [grants numbers JSGG20190819175801678 & JSGG20191129105838333], the Shenzhen Collaborative Innovation Project [grant numbers CJGJZD20200617103003009], the Shenzhen Pingshan District Science and Technology Innovation Fund [grant numbers PSKG202003&PSKG202007], the National Natural Science Foundation of China [grant numbers 61905146].
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 202>
 
Accession number:20230813622866
Title:Single underwater image restoration based on color correction and optimized transmission map estimation
Authors:Ke, Ke (1, 2, 3); Zhang, Chunmin (1, 2); Wang, Yanqiang (1, 2); Zhang, Yujiao (1, 2); Yao, Baoli (3) 
Author affiliation:(1) School of Physics, Xi&rsquo;an Jiaotong University, Xi&rsquo;an; 710049, China; (2) The Institute of Space Optics, Xi&rsquo;an Jiaotong University, Xi&rsquo;an; 710049, China; (3) State Key Laboratory of Transient Optics and Photonics, Xi&rsquo;an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi&rsquo;an; 710119, China 
Corresponding authors:Zhang, Chunmin(zcm@xjtu.edu.cn); Yao, Baoli(yaobl@opt.ac.cn)
Source title:Measurement Science and Technology
Abbreviated source title:Meas. Sci. Technol.
Volume:34
Issue:5
Issue date:May 2023
Publication year:2023
Article number:055408
Language:English
ISSN:09570233
E-ISSN:13616501
CODEN:MSTCEP
Document type:Journal article (JA)
Publisher:Institute of Physics
Abstract:<div data-language="eng" data-ev-field="abstract">Underwater images often suffer from color distortion and resolution degradation due to the absorption and scattering of light. To deal with these problems, a novel underwater image restoration framework was designed to remove color deviation and background scattering successively. Firstly, an effective color correction method based on Lab color space is adopted to remove the color cast. Secondly, the color, saturation, and detail information are considered comprehensively to construct the scene depth map and edge map to estimate the transmission, and the relationship between the scattering coefficient and wavelength is used to modify the transmission map of each channel. In addition, a weighted least squares filter with adaptive smoothing parameters is introduced to estimate the local background light, which is applicable to the underwater scene with complex scattering. The experimental results show that the method performs better in color correction and detail enhancement, and the image quality is significantly improved.<br/></div> &copy; 2023 IOP Publishing Ltd.
Number of references:48
Main heading:Wavelet transforms
Controlled terms:Color - Image enhancement - Image reconstruction - Restoration - Transmissions - Underwater imaging
Uncontrolled terms:Absorption and scattering of light - Background light - Color deviations - Color distortions - Color resolution - Colour corrections - Local background light - MAP estimation - Underwater image - Wavelets transform
Classification code:602.2  Mechanical Transmissions - 741.1  Light/Optics - 746  Imaging Techniques - 921.3  Mathematical Transformations
DOI:10.1088/1361-6501/acb72d
Funding details:  Number: SKLAO2021001A04, Acronym: -, Sponsor: -;Number: 41530422,42020104008, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2012AA121101,62005221, Acronym: -, Sponsor: National High-tech Research and Development Program;
Funding text:This work was supported by the Major International (Regional) Joint Research Project of National Natural Science Foundation of China (42020104008); Key Program of National Natural Science Foundation of China (41530422); National High Technology Research and Development Program of China (863 Program) (2012AA121101); National Natural Science Foundation of China (62005221); Open Foundation of State Key Laboratory of applied optics (SKLAO2021001A04).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 203>
 
Accession number:20222312202688
Title:MinimalGAN: diverse medical image synthesis for data augmentation using minimal training data
Authors:Zhang, Yipeng (1, 2, 3); Wang, Quan (1, 2); Hu, Bingliang (1, 2) 
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology, Xi&rsquo;an Institute of Optics and Precision Mechanics of the Chinese Academy of Sciences, Shaanxi, Xi&rsquo;an; 710119, China; (2) The Key Laboratory of Biomedical Spectroscopy of Xi&rsquo;an, Shaanxi, Xi&rsquo;an; 710119, China; (3) School of Optoelectronics, University of Chinese Academy of Sciences, Beijing; 100190, China 
Corresponding authors:Wang, Quan(wangquan@opt.ac.cn); Hu, Bingliang(hbl@opt.ac.cn)
Source title:Applied Intelligence
Abbreviated source title:Appl Intell
Volume:53
Issue:4
Issue date:February 2023
Publication year:2023
Pages:3899-3916
Language:English
ISSN:0924669X
E-ISSN:15737497
CODEN:APITE4
Document type:Journal article (JA)
Publisher:Springer
Abstract:<div data-language="eng" data-ev-field="abstract">Image synthesis techniques have limited application in the medical field due to unsatisfactory authenticity and precision. Additionally, synthesizing diverse outputs is challenging when the training data are insufficient, as in many medical datasets. In this work, we propose an image-to-image network named the Minimal Generative Adversarial Network (MinimalGAN), to synthesize annotated, accurate, and diverse medical images with minimal training data. The primary concept is to make full use of the internal information of the image and decouple the style from the content by separating them in the self-coding process. After that, the generator is compelled to concentrate on content detail and style separately to synthesize diverse and high-precision images. The proposed MinimalGAN includes two image synthesis techniques; the first is style transfer. We synthesized a stylized retinal fundus dataset. The style transfer deception rate is much higher than that of traditional style transfer methods. The blood vessel segmentation performance increased when only using synthetic data. The other image synthesis technique is target variation. Unlike the traditional translation, rotation, and scaling on the whole image, this approach only performs the above operations on the segmented target being annotated. Experiments demonstrate that segmentation performance improved after utilizing synthetic data.<br/></div> &copy; 2022, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.
Number of references:64
Main heading:Image segmentation
Controlled terms:Blood vessels - Generative adversarial networks - Image coding - Medical imaging
Uncontrolled terms:Data augmentation - Image generations - Images segmentations - Images synthesis - Medical fields - Minimal training - Segmentation performance - Synthesis techniques - Synthetic data - Training data
Classification code:461.1  Biomedical Engineering - 461.2  Biological Materials and Tissue Engineering - 723.4  Artificial Intelligence - 746  Imaging Techniques
DOI:10.1007/s10489-022-03609-x
Funding details:  Number: -, Acronym: CAS, Sponsor: Chinese Academy of Sciences;Number: -, Acronym: XIOPM, Sponsor: Xi'an Institute of Optics and Precision Mechanics;
Funding text:The research was supported by the Key Laboratory of Spectral Imaging Technology, Xi&rsquo;an Institute of Optics and Precision Mechanics of the Chinese Academy of Sciences, the Key laboratory of Biomedical Spectroscopy of Xi&rsquo;an, the Outstanding Award for Talent Project of the Chinese Academy of Sciences, "From 0 to 1" Original Innovation Project of the Basic Frontier Scientific Research Program of the Chinese Academy of Sciences, and Autonomous Deployment Project of Xi&rsquo;an Institute of Optics and Precision Mechanics of Chinese Academy of Sciences.
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 204>
 
Accession number:20231513870228
Title:Reconstruction algorithm using 2N+1 raw images for structured illumination microscopy
Authors:Fang, Xiang (1); Wen, Kai (1); An, Sha (1); Zheng, Juanjuan (1, 2); Li, Jianlang (1); Zalevsky, Zeev (3); Gao, Peng (1) 
Author affiliation:(1) School of Physics, Xidian University, Xi&rsquo;an; 710071, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi&rsquo;an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi&rsquo;an; 710119, China; (3) Bar-Ilan University, Faculty of Engineering and Nano Technology Center, Ramat-Gan, Israel 
Corresponding author:Gao, Peng(peng.gao@xidian.edu.cn)
Source title:Journal of the Optical Society of America A: Optics and Image Science, and Vision
Abbreviated source title:J Opt Soc Am A
Volume:40
Issue:4
Issue date:April 2023
Publication year:2023
Pages:765-773
Language:English
ISSN:10847529
E-ISSN:15208532
CODEN:JOAOD6
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">This paper presents a structured illumination microscopy (SIM) reconstruction algorithm that allows the reconstruction of super-resolved images with 2N + 1 raw intensity images, with N being the number of structured illumination directions used. The intensity images are recorded after using a 2D grating for the projection fringe and a spatial light modulator to select two orthogonal fringe orientations and perform phase shifting. Super-resolution images can be reconstructed from the five intensity images, enhancing the imaging speed and reducing the photobleaching by 17%, compared to conventional two-direction and three-step phase-shifting SIM. We believe the proposed technique will be further developed and widely applied in many fields.<br/></div> &copy; 2023 Optica Publishing Group.
Number of references:35
Main heading:Photobleaching
Controlled terms:Image enhancement - Image reconstruction - Light modulators
Uncontrolled terms:2D grating - Fringe orientations - Intensity images - Phase-shifting - Raw images - Reconstruction algorithms - Resolution images - Spatial light modulators - Structured illumination - Superresolution
Classification code:741.1  Light/Optics - 801  Chemistry
Numerical data indexing:Force 2.00E+00N, Percentage 1.70E+01%
DOI:10.1364/JOSAA.483884
Funding details:  Number: 2019JJ012, Acronym: -, Sponsor: -;Number: 3-18137, Acronym: MOST, Sponsor: Ministry of Science, Technology and Space;Number: 62075177, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: -, Acronym: CSC, Sponsor: China Scholarship Council;Number: 2021-2022, Acronym: -, Sponsor: International Cooperation and Exchange Programme;Number: SKLTOP202001, Acronym: SKLTOP, Sponsor: State Key Laboratory of Transient Optics and Photonics;Number: 2021YFF0700300,2022YFE0100700, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;Number: QTZX22039,XJS210504, Acronym: -, Sponsor: Fundamental Research Funds for the Central Universities;
Funding text:Funding. National Natural Science Foundation of China (62075177); National Key Research and Development Program of China (2021YFF0700300, 2022YFE0100700); Ministry of Science, Technology and Space (3-18137); International Cooperation and Exchange Programme (2021-2022); China Scholarship Council; Fundamental Research Funds for the Central Universities (QTZX22039, XJS210504); Key Laboratory of Wuliangye-flavor Liquor Solid-state Fermentation, China National Light Industry (2019JJ012); State Key Laboratory of Transient Optics and Photonics (SKLTOP202001).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
 
<RECORD 205>
 
Accession number:20231914062482
Title:150 Gbps multi-wavelength FSO transmission with 25-GHz ITU-T grid in the mid-infrared region    (Open Access)
Authors:Su, Yulong (1); Meng, Jiacheng (2, 3); Wei, Tingting (2, 3); Xie, Zhuang (2, 3); Jia, Shuaiwei (2, 3); Tian, Wenlong (1); Zhu, Jiangfeng (1); Wang, Wei (2, 3) 
Author affiliation:(1) School of Optoelectronic Engineering, Xidian University, Xi&rsquo;an; 710071, China; (2) State Key Laboratory of Transient Optics and Photonics, Xi&rsquo;an Institute of Optics and Precision Mechanics (XIOPM), Chinese Academy of Sciences (CAS), Xi&rsquo;an; 710119, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China 
Source title:Optics Express
Abbreviated source title:Opt. Express
Volume:31
Issue:9
Issue date:April 24, 2023
Publication year:2023
Pages:15156-15169
Language:English
E-ISSN:10944087
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">The 3&sim;5 &micro;m mid-infrared (mid-IR) light has several exceptional benefits in the case of adverse atmospheric conditions compared to the 1.5 &micro;m band, so it is a promising candidate for optical carriers for free-space communication (FSO) through atmospheric channels. However, the transmission capacity in the mid-IR band is constrained in the lower range due to the immaturity of its devices. In this work, to replicate the 1.5 &micro;m band dense wavelength division multiplexing (DWDM) technology to the 3 &micro;m band for high-capacity transmission, we demonstrate a 12-channel 150 Gbps FSO transmission in the 3 &micro;m band based on our developed mid-IR transmitter and receiver modules. These modules enable wavelength conversion between the 1.5 &micro;m and 3 &micro;m bands based on the effect of difference-frequency generation (DFG). The mid-IR transmitter effectively generates up to 12 optical channels ranging from 3.5768 &micro;m to 3.5885 &micro;m with a power of 6.6 dBm, and each channel carries 12.5 Gbps binary phase shift keying (BPSK) modulated data. The mid-IR receiver regenerates the 1.5 &micro;m band DWDM signal with a power of -32.1 dBm. Relevant results of regenerated signal demodulation have been collected in detail, including bit error ratio (BER), constellation diagram, and eye diagram. The power penalties of the 6th to 8th channels selected from the regenerated signal are lower than 2.2 dB compared with back-to-back (BTB) DWDM signal at a bit error ratio (BER) of 1E-6, and other channels can also achieve good transmission quality. It is expected to further push the data capacity to the terabit-per-second level by adding more 1.5 &micro;m band laser sources and using wider-bandwidth chirped nonlinear crystals.<br/></div> &copy; 2023 Optica Publishing Group.
Number of references:43
Main heading:Dense wavelength division multiplexing
Controlled terms:Binary phase shift keying - Infrared devices - Optical communication - Optical frequency conversion - Quadrature phase shift keying - Signal receivers - Transmitters
Uncontrolled terms:Bit error ratios - Dense wavelength-division-multiplexing - Dense-wavelength-division-multiplexing - Free-space communication - Infrared light - Mid-infrared regions - Midinfrared - Multiplexing signals - Multiwavelength - Power
Classification code:717.1  Optical Communication Systems - 741.1.1  Nonlinear Optics
Numerical data indexing:Bit rate 1.25E+10bit/s, Bit rate 1.50E+11bit/s, Decibel 2.20E+00dB, Decibel milliwatts -3.21E+01dBm, Decibel milliwatts 6.60E+00dBm, Frequency 2.50E+10Hz
DOI:10.1364/OE.487668
Funding details:  Number: 62205261, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: SKLST202106, Acronym: SKLTOP, Sponsor: State Key Laboratory of Transient Optics and Photonics;Number: XJS222801, Acronym: -, Sponsor: Fundamental Research Funds for the Central Universities;Number: 2022JQ-709, Acronym: -, Sponsor: Natural Science Basic Research Program of Shaanxi Province;
Funding text:Funding. National Natural Science Foundation of China (62205261); Natural Science Basic Research Program of Shaanxi Province (2022JQ-709); State Key Laboratory of Transient Optics and Photonics (SKLST202106); Fundamental Research Funds for the Central Universities (XJS222801).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Gold
 
<RECORD 206>
 
Accession number:20230182223
Title:Light Gap Bullets in Defocusing Media with Optical Lattices
Authors:Chen, Zhiming (1, 2); Wu, Zexing (2); Zeng, Jianhua (1, 3) 
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi&rsquo;an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi&rsquo;an; 710119, China; (2) School of Science, East China University of Technology, Nanchang; 330013, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China 
Corresponding author:Zeng, Jianhua(zengjh@opt.ac.cn)
Source title:SSRN
Issue date:June 7, 2023
Publication year:2023
Language:English
ISSN:15565068
Document type:Preprint (PP)
Publisher:SSRN
Abstract:<div data-language="eng" data-ev-field="abstract">Searching for three-dimensional spatiotemporal solitons (also known as light/optical bullets) has recently attracted keen theoretical and experimental interests in nonlinear physics. Currently, optical lattices of diverse kinds have been introduced to the stabilization of light bullets, while the investigation for the light bullets of gap type-nonlinear localized modes within the finite gap of the underlying linear Bloch spectrum-is lacking. Herein, we address the formation and stabilization properties of such light gap bullets in periodic media with defocusing nonlinearity, theoretically and in numerical ways. The periodic media are based on two-dimensional periodic standing waves created in a coherent three-level atomic system which is driven to the regime of electromagnetically induced transparency, which in principle can also be replaced by photonic crystals in optics or optical lattices in ground-state ultracold atoms system. The temporal dispersion term is tuned to normal (positive) group velocity dispersion so that to launch the light gap bullets under self-repulsive nonlinearity; two types of such light gap bullets constructed as three-dimensional gap solitons and vortices with topological charge m=1 within the first finite gap are reported and found to be robustly stable in the existence domains. On account of the light bullets were previously limited to the semi-infinite gap of periodic media and continuous nonlinear physical systems, the light gap bullets reported here thus supplement the missing type of three-dimensional spatiotemporal localized modes in periodic media which exhibit finite band gaps.<br/></div> &copy; 2023, The Authors. All rights reserved.
Number of references:65
Main heading:Optical lattices
Controlled terms:Atoms - Crystal lattices - Energy gap - Ground state - Group velocity dispersion - Nonlinear optics - Optical materials - Solitons - Stabilization - Transparency  - Vortex flow
Uncontrolled terms:Atomic system - Coherent atomic system - Defocusing - Electromagnetically-induced transparency - Finite gaps - Kerr nonlinearity - Kerrnonlinearities - Light bullet - Light gap bullet and vortex - Periodic media
Classification code:631.1  Fluid Flow, General - 741.1  Light/Optics - 741.1.1  Nonlinear Optics - 741.3  Optical Devices and Systems - 744.8  Laser Beam Interactions - 931.3  Atomic and Molecular Physics - 933.1.1  Crystal Lattice
DOI:10.2139/ssrn.4471674
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.Preprint ID:4471674
Preprint source website:https://papers.ssrn.com/sol3/papers.cfm
Preprint ID type:SSRN
 
 
<RECORD 207>
 
Accession number:20230097036
Title:Light gap bullets in defocusing media with optical lattices
Authors:Chen, Zhiming (1, 2); Zeng, Jianhua (1, 3) 
Author affiliation:(1) State Key Laboratory of Transient Optics and Photonics, Xi&rsquo;an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi&rsquo;an; 710119, China; (2) School of Science, East China University of Technology, Nanchang; 330013, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China 
Corresponding author:Zeng, Jianhua(zengjh@opt.ac.cn)
Source title:arXiv
Abbreviated source title:arXiv
Issue date:March 8, 2023
Publication year:2023
Language:English
E-ISSN:23318422
Document type:Preprint (PP)
Publisher:arXiv
Abstract:<div data-language="eng" data-ev-field="abstract">Searching for three-dimensional spatiotemporal solitons (also known as light/optical bullets) has recently attracted keen theoretical and experimental interests in nonlinear physics. Currently, optical lattices of diverse kinds have been introduced to the stabilization of light bullets, while the investigation for the light bullets of gap type&mdash;nonlinear localized modes within the finite gap of the underlying linear Bloch spectrum&mdash;is lacking. Herein, we address the formation and stabilization properties of such light gap bullets in periodic media with defocusing nonlinearity, theoretically and in numerical ways. The periodic media are based on two-dimensional periodic standing waves created in a coherent three-level atomic system which is driven to the regime of electromagnetically induced transparency, which in principle can also be replaced by photonic crystals in optics or optical lattices in ground-state ultracold atoms system. The temporal dispersion term is tuned to normal (positive) group velocity dispersion so that to launch the light gap bullets under self-repulsive nonlinearity; two types of such light gap bullets constructed as 3D gap solitons and vortices with topological charge m = 1 within the first finite gap are reported and found to be robustly stable in the existence domains. On account of the light bullets were previously limited to the semi-infinite gap of periodic media and continuous nonlinear physical systems, the light gap bullets reported here thus supplement the missing type of three-dimensional spatiotemporal localized modes in periodic media which exhibit finite band gaps.<br/></div> &copy; 2023, CC BY.
Number of references:54
Main heading:Optical lattices
Controlled terms:Crystal lattices - Energy gap - Ground state - Group velocity dispersion - Nonlinear optics - Optical materials - Solitons - Stabilization
Uncontrolled terms:Bloch spectrum - Defocusing - Finite gaps - Light bullet - Nonlinear localized modes - Nonlinear physics - Optical- - Periodic media - Spatiotemporal solitons - Stabilization property
Classification code:741.1.1  Nonlinear Optics - 741.3  Optical Devices and Systems - 744.8  Laser Beam Interactions - 933.1.1  Crystal Lattice
DOI:10.48550/arXiv.2303.04597
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.Preprint ID:2303.04597v1
Preprint source website:https://arxiv.org
Preprint ID type:ARXIV
 
 
<RECORD 208>
 
Accession number:20232214167431
Title:Multiband camouflage design with thermal management    (Open Access)
Authors:Huang, Lehong (1, 2, 3, 4); Li, Haochuan (1); Li, Zhiguo (1, 3, 4); Zhang, Wenbo (1, 2, 3); Ma, Caiwen (1, 3, 4); Zhang, Chunmin (2); Wei, Yuxuan (1, 3, 4); Zhou, Liang (1, 4); Li, Xun (1); Cheng, Zhiyuan (1, 3, 4); Guo, Xiaohui (1); Guo, Shiping (2) 
Author affiliation:(1) Xi&rsquo;an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi&rsquo;an; 710119, China; (2) School of Physics, Xi&rsquo;an Jiaotong University, Xi&rsquo;an; 710049, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China; (4) Key Laboratory of Space Precision Measurement Technology, Chinese Academy of Sciences, Xi&rsquo;an; 710119, China 
Source title:Photonics Research
Abbreviated source title:Photon. Res.
Volume:11
Issue:5
Issue date:May 2023
Publication year:2023
Pages:839-851
Language:English
ISSN:23279125
Document type:Journal article (JA)
Publisher:Optica Publishing Group (formerly OSA)
Abstract:<div data-language="eng" data-ev-field="abstract">Although the effective "stealth" of space vehicles is important, current camouflage designs are inadequate in meeting all application requirements. Here, a multilayer wavelength-selective emitter is demonstrated. It can realize visible light and dual-band mid-infrared camouflage with thermal control management in two application scenarios, with better effect and stronger radiation cooling capability, which can significantly improve the stealth and survivability of space vehicles in different environments. The selective emitter demonstrated in this paper has the advantages of simple structure, scalability, and ease of large-area fabrication, and has made a major breakthrough in driving multiband stealth technology from simulation research to physical verification and even practical application.<br/></div> &copy; 2023 Chinese Laser Press.
Number of references:49
Main heading:Temperature control
Controlled terms:Stealth technology
Uncontrolled terms:'current - Application requirements - Dual Band - Infrared camouflage - Midinfrared - Multi band - Selective emitters - Space vehicles - Visible light bands - Wavelength-selective
Classification code:404.1  Military Engineering - 731.3  Specific Variables Control
DOI:10.1364/PRJ.484448
Funding details:  Number: 12103081,42101380,61875257, Acronym: NSFC, Sponsor: National Natural Science Foundation of China;Number: 2021YFC2202103,2021YFC2202203, Acronym: NKRDPC, Sponsor: National Key Research and Development Program of China;
Funding text:Funding. National Key Research and Development Program of China (2021YFC2202103, 2021YFC2202203); National Natural Science Foundation of China (12103081, 42101380, 61875257).
 
Database:Compendex
Compilation and indexing terms, Copyright 2023 Elsevier Inc.
Open Access type(s): All Open Access, Green
 
<RECORD 209>
 
Accession number:20231513879442
Title:Adaptive convolution kernel network for change detection in hyperspectral images
Authors:Liu, Song (1, 2); Li, Haiwei (1); Chen, Junyu (1, 2); Li, Siyuan (1); Song, Liyao (3); Zhang, Geng (1); Hu, Bingliang (1) 
Author affiliation:(1) Key Laboratory of Spectral Imaging Technology of CAS, Xi&rsquo;an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi&rsquo;an; 710119, China; (2) University of Chinese Academy of Sciences, Beijing; 100049, China; (3) School of Information and Communications Engineering, Xi&rsquo;an Jiaotong University, Xi&rsquo;an; 710049, China 
Corresponding author:Hu, Bingliang(hbl@opt.ac.cn)
Source title:Applied Optics
Abbreviated source title:Appl. Opt.
<