2024
2024
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Record 301 of
Title:An analysis method for structures of ring-shaped resonators with heterogeneous materials
Author Full Names:Pei, Yongle(1); Xu, Liang(1); Huang, Wei(1); Gao, Limin(1); Li, Luxian(2); Yuan, Xiaobin(1)Source Title:Zhongguo Guanxing Jishu Xuebao/Journal of Chinese Inertial TechnologyLanguage:ChineseDocument Type:Journal article (JA)Abstract:Based on the theory of homogeneous elasticity, the traditional method for analyzing the structural characteristics of a ring-shaped resonators cannot accurately describe the influence of the mechanical properties of heterogeneous materials on the static and dynamic performance of resonators. According to the Euler beam theory of circular curved structures, a method for analyzing the structural properties of ring-shaped resonators with heterogeneous materials is established, utilizing the constitutive relationships of heterogeneous materials and Hamilton principle. With the theory above and Bubnov-Galerkin method, theoretical solutions are derived for the static bending and dynamic rotating problems. Then, the influence of heterogeneous mechanical properties is analyzed for the bending deflection, second-order bending angular frequency and precession coefficient. The performance analysis results of typical heterogeneous materials show that the traditional method has an error of over 59% in calculating the second-order bending angular frequency, while the proposed method can accurately predict the static and dynamic responses of structures of heterogeneous resonators and calculate the second-order bending angular frequency. ? 2024 Editorial Department of Journal of Chinese Inertial Technology. All rights reserved.Affiliations:(1) Xi'an Institute of Optics and Precision Mechanics, CAS, Xi’an; 710119, China; (2) State Key Laboratory for Strength and Vibration of Mechanical Structures, Shaanxi Key Laboratory of Environment and Control for Flight Vehicle, School of Aerospace Engineering, Xi’an Jiaotong University, Xi’an; 710049, ChinaPublication Year:2024Volume:32Issue:8Start Page:821-827DOI Link:10.13695/j.cnki.12-1222/o3.2024.08.010數(shù)據(jù)庫ID（收錄號）:20244017128640 -
Record 302 of
Title:Single line of sight frame camera based on the RadOptic effect of ultrafast semiconductor detector
Author Full Names:Liu, Yiheng(1,2,3); He, Kai(1); Yan, Xin(1); Gao, Guilong(1); Du, Wanyi(1); Shang, Yang(1); Wang, Gang(1); Wang, Tao(1); Zhang, Jun(4); Tian, Jinshou(1,3); Tan, Xiaobo(4)Source Title:Optics and Lasers in EngineeringLanguage:EnglishDocument Type:Journal article (JA)Abstract:A new optical beam splitting method is proposed, based on which the optical frame camera capable of capturing multiple frames in a single exposure is designed and experimentally verified. The operation of the frame camera is based on an ultra-fast response semiconductor detector. It is equipped with an optical beam splitter and an optical imaging module. The ultrafast semiconductor detector receives an optical pulse that produces a transient refractive index change, and ultrafast physical processes are recorded by diffracting the probe laser through the transient phase grating. The interaction of an X-ray pulse with a semiconductor detector to produce a phase grating is simulated, based on the Monte Carlo method. The optical beam splitting mode separates a laser into two optical pulses with a certain time difference in the direction of polarization perpendicular to each other. The imaging module filters the diffracted probe laser in the spectral plane and then images multiple frames. The frame camera was used to record the temporal and spatial distribution characteristics of femtosecond laser pulses with a temporal resolution of 4.1 ps. This frame camera has great potential and value for applying to experimental studies of inertial confinement fusion. ? 2024 Elsevier LtdAffiliations:(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) College of Electronic Science, National University of Defense Technology, Hunan, Changsha; 410073, ChinaPublication Year:2024Volume:175Article Number:108029DOI Link:10.1016/j.optlaseng.2024.108029數(shù)據(jù)庫ID（收錄號）:20240315382269 -
Record 303 of
Title:Circularly polarized RABBITT applied to a Rabi-cycling atom
Author Full Names:Liao, Yijie(1); Olofsson, Edvin(2); Dahlstr?m, Jan Marcus(2); Pi, Liang-Wen(3); Zhou, Yueming(1); Lu, Peixiang(1,4)Source Title:Physical Review ALanguage:EnglishDocument Type:Journal article (JA)Abstract:We utilize the reconstruction of attosecond beating by interference of two-photon transitions (RABBITT) technique to study the phase of a Rabi-cycling atom using circularly polarized extreme ultraviolet and infrared fields, where the infrared field induces Rabi oscillations between the 2s and 2p states of lithium. Autler-Townes splittings are observed in sidebands of the photoelectron spectra and the relative phases of outgoing electron wave packets are retrieved from the azimuthal angle. In this RABBITT scheme, more ionization pathways beyond the usual two-photon pathways are required. Our results show that the polar-angle-integrated and polar-angle-resolved RABBITT phases have different behaviors when the extreme ultraviolet and infrared fields have co- and counter-rotating circular polarizations, which are traced back to the different ionization channels according to the selection rules in these two cases and their competition relying on the propensity rule in laser-assisted photoionization. ? 2024 American Physical Society.Affiliations:(1) School of Physics, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan; 430074, China; (2) Department of Physics, Lund University, Box 118, Lund; SE-221 00, Sweden; (3) Center for Attosecond Science and Technology, Xi'An Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, China; (4) Optics Valley Laboratory, Hubei; 430074, ChinaPublication Year:2024Volume:109Issue:4Article Number:043104DOI Link:10.1103/PhysRevA.109.043104數(shù)據(jù)庫ID（收錄號）:20241515854295 -
Record 304 of
Title:Designing ultra-broadband terahertz polarization converters based on the transformer model
Author Full Names:Mao, Bingxuan(1); Chang, Honghao(2); Xing, Xiaohua(1); Zhang, Qiankun(1); Zou, Die(1); Liu, Yin(1); Yao, Jianquan(1); Bi, Haixia(2); Wu, Liang(1)Source Title:Optics CommunicationsLanguage:EnglishDocument Type:Journal article (JA)Abstract:Polarization, a fundamental property of terahertz (THz) waves, can be controlled using metasurfaces for signal transmission and sensitive measurements. However, conventional methods for designing polarization-conversion metasurfaces require numerous numerical simulation iterations and trial and error attempts that are computationally intensive and time-consuming, necessitating a more rapid and efficient approach. This study proposes a transformer-based method for the inverse design of terahertz polarization converters; the approach can accurately design the corresponding metasurface based on the target spectrum. The model also comprises a forward network that can precisely and intuitively predict the meta-atoms spectra with high simulation speed and reduced computational cost. Using this approach, two ultra-broadband polarization conversion devices were designed in approximately 0.006 s within a target frequency range of 0.5–4 THz, with polarization conversion ratios greater than 90% within 1.23–3.19 THz and 1.18–3.24 THz. Additionally, the average cross-polarization ratio was greater than 50%. This study provides insights into designing terahertz polarization converters, which are applicable in terahertz communications, polarization imaging, and biomedical procedures. ? 2024 Elsevier B.V.Affiliations:(1) College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Key Laboratory of Optoelectronics Information and Technology (Ministry of Education), Tianjin; 300072, China; (2) School of Information and Communications Engineering, Xian Jiaotong University, Xi'an; 710049, ChinaPublication Year:2024Volume:559Article Number:130434DOI Link:10.1016/j.optcom.2024.130434數(shù)據(jù)庫ID（收錄號）:20241215767061 -
Record 305 of
Title:Underwater Single-Photon Profiling under Turbulence and High Attenuation Environment
Author Full Names:Wang, Jie(1,2,3); Hao, Wei(1,3); Chen, Songmao(1,3); Xie, Meilin(1,3); Li, Xiangyu(4); Shi, Heng(2,4); Feng, Xubin(1); Su, Xiuqin(1,2,3)Source Title:IEEE Geoscience and Remote Sensing LettersLanguage:EnglishDocument Type:Journal article (JA)Abstract:Underwater single-photon imaging is challenging, as the transmitting path presents turbulence and strong backscattering noise; both facts degrade the image, thus hindering its applications in real world. However, current studies on underwater single-photon modeling have generally overlooked the potential impact of water turbulence on imaging performance. This oversight may result in an inaccurate characterization of the optical propagation process in realistic imaging environment. This letter proposed a joint denoising and deblurring method with regularization by denoising (JDD-RED) for underwater single-photon image that include the modeling of turbulence and the tailored restoration model, improving the performance by considering blurring mechanism, as well as advanced signal processing method. This method is validated on numerical experiments by employing joint deblurring and denoising tasks. Compared with the PICK-3-D algorithm, the JDD-RED reconstruction results demonstrate that more detailed information can be retained while denoising. In addition, the results show an average improvement of 1.48 dB in peak signal-to-noise ratio (PSNR) and 60% in structural similarity (SSIM), proving the superior performance of the JDD-RED algorithm. ? 2004-2012 IEEE.Affiliations:(1) Xi'an Institute of Optics and Precision Mechanics, Key Laboratory of Space Precision Measurement Technology and the Center for Shared Technologies and Facilities, Chinese Academy of Sciences, Xi'an; 710119, China; (2) University of Chinese Academy of Sciences, School of Optoelectronics, Beijing; 100049, China; (3) Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao; 266200, China; (4) Xi'an Institute of Optics and Precision Mechanics, Key Laboratory of Space Precision Measurement Technology, Chinese Academy of Sciences, Xi'an; 710119, ChinaPublication Year:2024Volume:21Article Number:6501605DOI Link:10.1109/LGRS.2024.3432931數(shù)據(jù)庫ID（收錄號）:20243116773778 -
Record 306 of
Title:Dynamic Range Study of Microchannel Plate Photomultiplier Tubes under Visible Light Pulse Input
Author Full Names:Wei, Jianan(1,2); Liu, Hulin(2); Chen, Ping(2,3); Li, Yang(4); Li, Kuinian(2); Wei, Yonglin(2); He, Luanxuan(1,2); Zhao, Xinnan(1,2); Sai, Xiaofeng(2); Liu, Deng(5); Tian, Jinshou(2,3); Zhao, Wei(2,3)Source Title:Guangzi Xuebao/Acta Photonica SinicaLanguage:ChineseDocument Type:Journal article (JA)Abstract:Microchannel Plate Photomultiplier Tube（MCP-PMT），as a high-performance photodetector，has been widely used in various detection experiments in recent years. In previous studies，people mainly focused on improving the sensitivity and temporal resolution of optoelectronic detection devices，while ignoring the key factor of high linearity. With the continuous development of the demand for large dynamic detection，in-depth research and development of MCP-PMT with large dynamic range has become an urgent need for current research.The dynamic range of MCP-PMT is related to many factors，such as the intensity and frequency of input visible light，the material of the microchannel board，and the voltage values applied to each part of MCP-PMT. This article mainly starts from two aspects：the input light pulse frequency and the potential difference applied by the backend of MCP-PMT，and delves into the reasons why the output electrons of MCP-PMT deviate from normal linear multiplication. By combining theoretical analysis and experimental testing，the influence of the repetition frequency of pulse light signals and the potential difference between the second microchannel plate and the anode on the dynamic range of MCP-PMT was studied in detail. When the input light pulse width is 50 ns and the repetition frequency is 500 Hz，the maximum linear output of the anode can reach 2 V（i.e. 40 mA）；when the repetition frequency increases to 1 000 Hz，the linear deviation degree reaches more than 10% when the anode output is 1 V（i. e. 20 mA）；when the input light frequency further increases to 5 000 Hz and the anode output reaches 0.3 V（i. e. 6 mA），the degree of linear deviation has reached about 15%. As the electric potential difference between the second microchannel plate and the anode increases，the maximum linear output voltage of the anode shows fluctuating changes. When the electric potential difference between the second microchannel plate and the anode is around 200 V，the linear output voltage of the anode reaches its peak. As the electric potential difference increases，the linear output voltage of the anode begins to fluctuate，reaching the second peak at a electric potential difference of around 500 V. In this article，we investigated the influence of the frequency of pulse input light and the electric potential difference between the second microchannel plate and the anode on the dynamic range of MCP-PMT，and obtained two conclusions through experimental verification：1）As the pulse input frequency increases，the output voltage of MCP-PMT will detach from the linear region earlier. 2）As the potential difference between MCP2 and the anode increases，the maximum linear output voltage of MCP-PMT does not simply vary monotonically，but exhibits a constantly fluctuating trend in resistance. On this basis，further exploration was conducted on the factors that constrain the dynamic range of MCP-PMT，namely insufficient wall charge supplementation and interference from space charge effects. When the frequency of the input pulse is high，the constraint on the dynamic range of MCP-PMT is mainly related to the former；when the electric potential difference between the second microchannel plate and the anode increases，due to the complex situation of a large number of secondary electrons transferring between the plates to the anode，the dynamic range will be affected by the space charge effect and cannot be directly proportional to the electric field strength. ? 2024 Chinese Optical Society. All rights reserved.Affiliations:(1) University of Chinese Academy of Sciences, Beijing; 100049, China; (2) Key Laboratory of Ultra-fast Photoelectric Diagnostics Technology, Xi'an Institute of Optics and Precision Machinery, Chinese Academy of Sciences, Xi'an; 710119, China; (3) Extreme Optics Collaborative Innovation Center, Shanxi University, Taiyuan; 030006, China; (4) State Key Laboratory of Environmental Simulation and Effects of Intense Pulse Radiation, Northwest Nuclear Technology Research Institute, Xi'an; 710024, China; (5) A Center of Equipment Development Department, Beijing; 100034, ChinaPublication Year:2024Volume:53Issue:2Article Number:0204001DOI Link:10.3788/gzxb20245302.0204001數(shù)據(jù)庫ID（收錄號）:20240715561760 -
Record 307 of
Title:Pakistan's 2022 floods: Spatial distribution, causes and future trends from Sentinel-1 SAR observations
Author Full Names:Chen, Fang(1,2,3); Zhang, Meimei(1,2); Zhao, Hang(4); Guan, Weigui(1,2,3); Yang, Aqiang(1,2)Source Title:Remote Sensing of EnvironmentLanguage:EnglishDocument Type:Journal article (JA)Abstract:Floods are a great threat to Pakistan with increasing concern. As the consequences of increased extreme weather related to climate change, Pakistan experiences severe floods almost every year. This study aims to explore and analysis the actual inundated situation, magnitude, the possible causes of the 2022 devastating floods, and future trends. We presented an enhanced nationwide flood mapping method and compared with other pixel-based image processing techniques including active contours and change detection. These algorithms were applied to Sentinel-1 Ground Range Detected (GRD) Synthetic Aperture Radar (SAR) imagery (10 m spatial resolution) with various land types and inundation scenarios in Pakistan, and were evaluated using other reference flood products. Accuracy evaluation analysis demonstrated that our algorithm has high robustness and accuracy, with the overall accuracy (OA) higher than 0.83 and critical success index (CSI) up to 0.91, and is suitable for automated flood monitoring in near real time. Nearly one-third of the lands were flooded in 2022, and more than half were inundated croplands. Punjab and Sindh provinces were the most severely affected regions, with the proportions of inundated area in 2022 (21.26% and 20.55%) nearly twice of that in 2010 (11.40% and 12.70%), indicating an intensified flooding trend. Analysis of possible influential factors showed that the intense and cumulative rainfall during the monsoon season (June to August) was the major cause of the 2022 flood event. Although the snow melted rapidly in June (the average change in snow depth is ～10 mm), the overall ablation contributed insignificant amount to the flood water. The glacial lake outburst floods (GLOFs) induced by abnormal April–May heatwave provide water flowed into the tributaries of the Indus River, but are difficult to spread for thousands of kilometers from mountains to the plain downstream. The combination of the intrinsic arid climate and extreme floods exacerbate the already severe situation. ? 2024 Elsevier Inc.Affiliations:(1) International Research Center of Big Data for Sustainable Development Goals, Beijing; 100094, China; (2) Key Laboratory of Digital Earth Science, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing; 100094, China; (3) University of Chinese Academy of Sciences, Beijing; 100049, China; (4) Key Laboratory of Spectral Imaging Technology, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an; 710119, ChinaPublication Year:2024Volume:304Article Number:114055DOI Link:10.1016/j.rse.2024.114055數(shù)據(jù)庫ID（收錄號）:20240915643476 -
Record 308 of
Title:Multi-Aperture Joint-Encoding Fourier Ptychography for a Distributed System
Author Full Names:Wang, Tianyu(1,2); Xiang, Meng(1,2,3); Liu, Fei(2); Liu, Jinpeng(1,2,3); Dong, Xue(1,2,4); Wang, Sen(1,2); Li, Gang(5); Shao, Xiaopeng(1,2)Source Title:Remote SensingLanguage:EnglishDocument Type:Journal article (JA)Abstract:High-resolution infrared remote sensing imaging is critical in planetary exploration, especially under demanding engineering conditions. However, due to diffraction, the spatial resolution of conventional methods is relatively low, and the spatial bandwidth product limits imaging systems’ design. Extensive research has been conducted with the aim of enhancing spatial resolution in remote sensing using a multi-aperture structure, but obtaining high-precision co-phase results using a sub-aperture remains challenging. A new high-resolution imaging method utilizing multi-aperture joint-encoding Fourier ptychography (JEFP) is proposed as a practical means to achieve super-resolution infrared imaging using distributed platforms. We demonstrated that the JEFP approach achieves pixel super-resolution with high efficiency, without requiring subsystems to perform mechanical scanning in space or to have high position accuracy. Our JEFP approach extends the application scope of Fourier ptychographic imaging, especially in distributed platforms for planetary exploration applications. ? 2024 by the authors.Affiliations:(1) School of Optoelectronic Engineering, Xidian University, Xi’an; 710071, China; (2) Xi’an Key Laboratory of Computational Imaging, Xi’an; 710071, China; (3) CAS Key Laboratory of Space Precision Measurement Technology, Xi’an; 710119, China; (4) National Key Laboratory of Infrared Detection Technologies, Shanghai; 200083, China; (5) Xian Research Institute of Surveying and Mapping, Xi’an; 710054, ChinaPublication Year:2024Volume:16Issue:6Article Number:1017DOI Link:10.3390/rs16061017數(shù)據(jù)庫ID（收錄號）:20241515862188 -
Record 309 of
Title:Airborne Small Target Detection Method Based on Multimodal and Adaptive Feature Fusion
Author Full Names:Xu, Shufang(1,2); Chen, Xu(1); Li, Haiwei(3); Liu, Tianci(4); Chen, Zhonghao(1); Gao, Hongmin(1); Zhang, Yiyan(1)Source Title:IEEE Transactions on Geoscience and Remote SensingLanguage:EnglishDocument Type:Journal article (JA)Abstract:The detection of airborne small targets amidst cluttered environments poses significant challenges. Factors such as the susceptibility of a single RGB image to interference from the environment in target detection and the difficulty of retaining small target information in detection necessitate the development of a new method to improve the accuracy and robustness of airborne small target detection. This article proposes a novel approach to achieve this goal by fusing RGB and infrared (IR) images, which is based on the existing fusion strategy with the addition of an attention mechanism. The proposed method employs the YOLO-SA network, which integrates a YOLO model optimized for the downsampling step with an enhanced image set. The fusion strategy employs an early fusion method to retain as much target information as possible for small target detection. To refine the feature extraction process, we introduce the self-adaptive characteristic aggregation fusion (SACAF) module, leveraging spatial and channel attention mechanisms synergistically to focus on crucial feature information. Adaptive weighting ensures effective enhancement of valid features while suppressing irrelevant ones. Experimental results indicate 1.8% and 3.5% improvements in mean average precision (mAP) over the LRAF-Net model and Infusion-Net detection network, respectively. Additionally, ablation studies validate the efficacy of the proposed algorithm's network structure. ? 1980-2012 IEEE.Affiliations:(1) Hohai University, College of Information Science and Engineering, Changzhou; 213200, China; (2) Shaanxi Key Laboratory of Optical Remote Sensing and Intelligent Information Processing, Xi'an; 710119, China; (3) Xi'an Institute of Optics and Precision Mechanics, Key Laboratory of Spectral Imaging Technology of CAS, Chinese Academy of Sciences, Xi'an; 710119, China; (4) Hohai University, College of Computer Science and Software Engineering, Nanjing; 211100, ChinaPublication Year:2024Volume:62Article Number:5637215DOI Link:10.1109/TGRS.2024.3443856數(shù)據(jù)庫ID（收錄號）:20243416917605 -
Record 310 of
Title:Linearly polarized RABBIT beyond the dipole approximation
Author Full Names:Liao, Yijie(1); Chen, Yongkun(1); Dahlstr?m, Jan Marcus(2); Pi, Liang-Wen(3); Lu, Peixiang(1,4); Zhou, Yueming(1,5)Source Title:Physical Review ALanguage:EnglishDocument Type:Journal article (JA)Abstract:We theoretically investigate nondipole effects in the reconstruction of attosecond beating by interference of two-photon transitions (RABBIT) of helium using linearly polarized extreme ultraviolet and infrared fields. By scanning the time delay between the two fields, we observe modulations in sidebands (SBs) both for angular-integrated photoelectron yield and forward-backward asymmetry in photoelectron distribution along the light-propagation direction. The SB modulations of the forward-backward asymmetry reveal Wigner and continuum-continuum time delays of the electron wave packets ionized via nondipole paths, different from the conventional RABBIT where only the dipole paths are involved. Furthermore, the time delays extracted from the forward-backward asymmetry show an abrupt jump as a function of polar emission angle of photoelectrons, due to the competition among continuum partial waves in nondipole laser-assisted photoionization. ? 2024 American Physical Society.Affiliations:(1) School of Physics, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan; 430074, China; (2) Department of Physics, Lund University, Box 118, Lund; SE-221 00, Sweden; (3) Center for Attosecond Science and Technology, Xi'An Institute of Optics and Precision Mechanics of the Chinese Academy of Sciences, Xi'an; 710119, China; (4) Optics Valley Laboratory, Hubei; 430074, China; (5) Hubei Optical Fundamental Research Center, Wuhan; 430074, ChinaPublication Year:2024Volume:110Issue:2Article Number:023109DOI Link:10.1103/PhysRevA.110.023109數(shù)據(jù)庫ID（收錄號）:20243516927919 -
Record 311 of
Title:Perturbed three-channel waveform synthesizer for efficient isolated attosecond pulse generation and characterization
Author Full Names:Dong, Dianhong(1,2,3); Wang, Hushan(1,2,3); Xue, Bing(1,2,3); Imasaka, Kotaro(1); Kanda, Natuski(1); Fu, Yuxi(2,3); Nabekawa, Yasuo(1); Takahashi, Eiji J.(1)Source Title:arXivLanguage:EnglishDocument Type:Preprint (PP)Abstract:The generation of gigawatt-class isolated attosecond pulses (IAPs) is vital for attosecond pump-probe experiments. In such experiments, the temporal duration of IAPs must be determined quickly and accurately. In this study, we developed a perturbed three-channel waveform synthesizer for efficient IAPs generation and characterization at low repetition rates (10 Hz). Intense IAPs centered at photon energies of 60 eV (227 as duration) in Ar and 107 eV (128 as duration) in Ne were generated by the driving field from a three-channel waveform synthesizer and characterized using all-optical frequency-resolved optical gating (AO-FROG), which accelerated the measurement time to several minutes, providing fast feedback for the tunability of the IAP source. The peak power of the IAPs is higher than that reported in the literature. Copyright ? 2024, The Authors. All rights reserved.Affiliations:(1) RIKEN Center for Advanced Photonics, RIKEN, 2-1, Hirosawa, Saitama, Wako-shi; 351-0198, Japan; (2) Center for Attosecond Science and 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, ChinaPublication Year:2024DOI Link:10.48550/arXiv.2412.04043數(shù)據(jù)庫ID（收錄號）:20250001726 -
Record 312 of
Title:Dual-biomimetic curved compound-eye camera system for multi-target distance measurement in a large field of view
Author Full Names:Liu, Yiming(1,2); Xu, Huangrong(1); Zhang, Yuanjie(1,2); Wu, Dengshan(1); Zhou, Xiaojun(1); Meng, Qingyang(1); Wang, Yuanyuan(3); Yu, Weixing(1,2)Source Title:Optics ExpressLanguage:EnglishDocument Type:Journal article (JA)Abstract:Biomimetic curved compound-eye cameras (BCCECs) have attracted great attention for their potential applications in a variety of fields such as target recognition, monitor and three-dimensional localization in military due to their unique optical properties such as large field of view (FOV) and small size. In this work, we proposed a multi-target distance measurement method based on a dual-BCCEC system in a large FOV. To guarantee the precise measurement of the distance of multiple targets, a feature point searching and matching algorithm is developed for the dual-BCCEC system to improve the localizing efficiency of common feature points. In addition, a CALibration Tag (CALTag) self-recognition calibration method is also developed to calibrate ommatidia of the BCCEC with a high efficiency. Based on these two methods, the coordinates of multiple targets with clear feature points can be obtained after the distortion correction in sub-images and thus the distances of multiple targets with clear feature points can be achieved simultaneously with a single compound-eye raw image. The experiment results show that the dual-BCCEC system has a high distant measurement accuracy with an error of less than 6.80% for at least ten different targets in the a working distance ranging from 400 to 600 m in a quite large FOV of 98°×98°. The method demonstrated in this work can pave the way for multi-targets tracking in those related areas with high security monitoring requirements. ? 2024 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.Affiliations:(1) Key Laboratory of Spectral Imaging Technology of Chinese Academy of Sciences, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, No. 17, Xinxi Road, Xian; 710119, China; (2) School of Optoelectronics, University of Chinese Academy of Sciences, Beijing; 100049, China; (3) School of Science, Northwest A & F University, Yangling; 712100, ChinaPublication Year:2024Volume:32Issue:23Start Page:41870-41881DOI Link:10.1364/OE.535365數(shù)據(jù)庫ID（收錄號）:20244617373854