2024

• Record 121 of
  
  Title:A Dual-FSM GI LiDAR Imaging Control Method Based on Two-Dimensional Flexible Turntable Composite Axis Tracking
  
  Author Full Names:Cao, Yu(1,2,3,4); Xie, Meilin(1,2,3); Wang, Haitao(1,2); Hao, Wei(1,2,3); Guo, Min(1,2,3); Jiang, Kai(1,2); Wang, Lei(1,2); Guo, Shan(1,2); Wang, Fan(1,2)

  Source Title:Remote Sensing

  Language:English

  Document Type:Journal article (JA)

  Abstract:In this study, a tracking and pointing control system with a dual-FSM (fast steering mirror) two-dimensional flexible turntable composite axis is proposed. It is applied to the target-tracking accuracy control in a GI LiDAR (ghost imaging LiDAR) system. Ghost imaging is a multi-measurement imaging method; the dual-FSM GI LiDAR tracking and pointing imaging control system proposed in this study mainly solves the problems of the high-resolution remote sensing imaging of high-speed moving targets and various nonlinear disturbances when this technology is transformed into practical applications. Addressing the detrimental effects of nonlinear disturbances originating from internal flexible mechanisms and assorted external environmental factors on motion control’s velocity, stability, and tracking accuracy, a nonlinear active disturbance rejection control (NLADRC) method based on artificial neural networks is advanced. Additionally, to overcome the limitations imposed by receiving aperture constraints in GI LiDAR systems, a novel optical path design for the dual-FSM GI LiDAR tracking and imaging system is put forth. The implementation of the described methodologies culminated in the development of a dual-FSM GI LiDAR tracking and imaging system, which, upon thorough experimental validation, demonstrated significant improvements. Notably, it achieved an improvement in the coarse tracking accuracy from 193.29 μrad (3σ) to 87.21 μrad (3σ) and enhanced the tracking accuracy from 10.1 μrad (σ) to 1.5 μrad (σ) under specified operational parameters. Furthermore, the method notably diminished the overshoot during the target capture process from 28.85% to 12.8%, concurrently facilitating clear recognition of the target contour. This research contributes significantly to the advancement of GI LiDAR technology for practical application, showcasing the potential of the proposed control and design strategies in enhancing system performance in the face of complex disturbances. © 2024 by the authors.

  Affiliations:(1) Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, 710119, China; (2) Key Laboratory of Space Precision Measurement Technology, Chinese Academy of Sciences, 710119, China; (3) Pilot National Laboratory for Marine Science and Technology, 266237, China; (4) Collaborative Innovation Center of Extreme Optics, Shanxi University, 030006, China

  Publication Year:2024

  Volume:16

  Issue:10

  Article Number:1679

  DOI Link:10.3390/rs16101679

  数据库ID（收录号）:20242216171109
• Record 122 of
  
  Title:Performance assessment of the HERD calorimeter with a photo-diode read-out system for high-energy electron beams
  
  Author Full Names:Adriani, O.(1,2); Ambrosi, G.(3); Antonelli, M.(4); Bai, Y.(5); Bai, X.(5); Bao, T.(6); Barbanera, M.(3); Berti, E.(1,2); Betti, P.(1,2); Bigongiari, G.(7,8); Bongi, M.(1,2); Bonvicini, V.(4); Bottai, S.(2); Cagnoli, I.(9,10); Cao, W.(5); Casaus, J.(11); Cerasole, D.(12,13); Chen, Z.(5); Cui, X.(6); D'Alessandro, R.(1,2); Di Venere, L.(13); Diaz, C.(11); Dong, Y.(6); Detti, S.(2); Duranti, M.(3); Gargano, F.(13); Gao, J.(5); Guo, S.(6); Giovacchini, F.(11); Finetti, N.(2,14); Formato, V.(15); Jiang, Y.(3,16); Liang, X.(5); Li, R.(5); Liao, C.(6); Liu, X.(6); Lyu, L.(5); Marin, J.(11); Martinez, G.(11); Mori, N.(2); Oliva, A.(17); Pacini, L.(2); Papini, P.(2); Pillera, R.(13); Pizzolotto, C.(4); Quan, Z.(6); Qin, J.J.(5); Silveri, L.(9,10); Silvestre, G.(3); Shi, D.(5); Serini, D.(13); Starodubtsev, O.(2); Tang, X.(6); Tiberio, A.(2); Vannuccini, E.(2); Velasco, M.(11); Wang, B.(5); Wang, J.(6); Wang, R.(6); Wang, Z.(6); Xu, M.(6); Yang, X.(6); Zampa, G.(4); Zampa, N.(4); Zhang, S.(6); Zheng, J.(5)

  Source Title:arXiv

  Language:English

  Document Type:Preprint (PP)

  Abstract:The measurement of cosmic rays at energies exceeding 100 TeV per nucleon is crucial for enhancing the understanding of high-energy particle propagation and acceleration models in the Galaxy. HERD is a space-borne calorimetric experiment that aims to extend the current direct measurements of cosmic rays to unexplored energies. The payload is scheduled to be installed on the Chinese Space Station in 2027. The primary peculiarity of the instrument is its capability to measure particles coming from all directions, with the main detector being a deep, homogeneous, 3D calorimeter. The active elements are read out using two independent systems: one based on wavelength shifter fibers coupled to CMOS cameras, and the other based on photo-diodes read-out with custom front-end electronics. A large calorimeter prototype was tested in 2023 during an extensive beam test campaign at CERN. In this paper, the performance of the calorimeter for high-energy electron beams, as obtained from the photo-diode system data, is presented. The prototype demonstrated excellent performance, e.g., an energy resolution better than 1% for electrons at 250 GeV. A comparison between beam test data and Monte Carlo simulation data is also presented. Copyright © 2024, The Authors. All rights reserved.

  Affiliations:(1) Department of Physics and Astronomy, University of Florence, Sesto Fiorentino, Florence; I-50019, Italy; (2) INFN sezione di Firenze, Sesto Fiorentino, Florence; I-50019, Italy; (3) INFN Sezione Perugia, Istituto Nazionale di Fisica Nucleare, Sezione di Perugia, Perugia; 06100, Italy; (4) INFN Sezione di Trieste, Padriciano 99, Trieste; I-34149, Italy; (5) Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (6) Institute of High Energy Physics, Chinese Academy of Sciences, Beijing; 100049, China; (7) Department of Physical Sciences, Earth and Environment, University of Siena, Siena; I-53100, Italy; (8) INFN Pisa, Largo B. Pontecorvo, 3, Pisa; 56127, Italy; (9) Gran Sasso Science Institute (GSSI), Viale Crispi 7, L'Aquila; I-67100, Italy; (10) INFN Laboratori Nazionali del Gran Sasso, Via Acitelli 22, Assergi, L'Aquila; I-67100, Italy; (11) Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Madrid; E-28040, Spain; (12) Dipartimento Interateneo di Fisica "M.Merlin", Università e del Politecnico di Bari, Bari; I-70126, Italy; (13) Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Bari, Bari; I-70126, Italy; (14) Department of Physical and Chemical Sciences, University of L'Aquila, Via Vetoio, Coppito, L'Aquila; 67100, Italy; (15) INFN Sezione Roma TorVergata, Istituto Nazionale di Fisica Nucleare, Sezione di Roma Tor Vergata, Roma; 00133, Italy; (16) Università degli Studi di Perugia, Università di Perugia, Perugia; 06100, Italy; (17) INFN Sezione Bologna, Istituto Nazionale di Fisica Nucleare, Sezione di Bologna, Bologna; 40126, Italy

  Publication Year:2024

  DOI Link:10.48550/arXiv.2410.03274

  数据库ID（收录号）:20240443821
• Record 123 of
  
  Title:Phase correction strategy based on structured light fringe projection profilometry
  
  Author Full Names:Cao, Hongyan(1,2); Qiao, Dayong(1,2); Yang, Di(3)

  Source Title:Optics Express

  Language:English

  Document Type:Journal article (JA)

  Abstract:Fringe projection profilometry based on structured light has been widely used in 3-D vision due to its advantages of simple structure, good robustness, and high speed. The principle of this technique is to project multiple orders of stripes on the object, and the camera captures the deformed stripe map. Phase unwrapping and depth map calculation are important steps. Still, in actual situations, phase ambiguity is prone to occur at the edges of the object. In this paper, an adaptive phase segmentation and correction (APSC) method after phase unwrapping is proposed. In order to effectively distinguish the stable area and unstable area of the phase, a boundary identification method is proposed to obtain the structural mask of the phase. A phase compensation method is proposed to improve the phase accuracy. Finally, we obtain the 3-D reconstruction result based on the corrected phase. Specific experimental results verify the feasibility and effectiveness of this method. © 2024 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.

  Affiliations:(1) Key Laboratory of Micro/Nano Systems for Aerospace, Ministry of Education, Northwestern Polytechnical University, Xi’an; 710072, China; (2) Shaanxi Province Key Laboratory of Micro and Nano Electro-Mechanical Systems, Northwestern Polytechnical University, Xi’an; 710072, China; (3) Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China

  Publication Year:2024

  Volume:32

  Issue:3

  Start Page:4137-4157

  DOI Link:10.1364/OE.513572

  数据库ID（收录号）:20240615499844
• Record 124 of
  
  Title:Exploration of cervical cancer image processing technology based on deep learning
  
  Author Full Names:Cheng, Cheng(1); Yang, Yi(2); Qu, Youshan(3)

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

  Language:English

  Document Type:Conference article (CA)

  Conference Title:2024 International Conference on Image, Signal Processing, and Pattern Recognition, ISPP 2024

  Conference Date:March 8, 2024 - March 10, 2024

  Conference Location:Guangzhou, China

  Conference Sponsor:Academic Exchange Information Centre (AEIC); Stevens Institute of Technology

  Abstract:The aim of this paper is to investigate cervical cancer image processing technology utilizing deep learning.Cervical cancer stands as a prevalent malignancy in females, and precise identification and localization of cancer cells hold paramount significance for treatment and prognosis evaluation.This paper presents the fundamental workflow of cervical cancer image processing and the associated principles of deep learning, including convolutional neural networks, autoencoders, and generative adversarial networks.In recent times, the swift advancement of deep learning technology has brought forth novel concepts and approaches for cervical cancer image processing.This paper is oriented toward the exploration of cervical cancer image processing technology grounded in deep learning.First, the basic workflow of cervical cancer image processing, including steps such as image acquisition, preprocessing, feature extraction, and target detection, is introduced.The application of deep learning in cervical cancer image processing is discussed in detail.As one of the core deep learning technologies, convolutional neural networks (CNNs) have achieved significant results in the fields of image classification, segmentation, and detection.This paper shall present the fundamental principles and prevalent architectures of CNNs, alongside their instances of utilization in cervical cancer image processing.Furthermore, the utilization of alternative deep learning approaches in cervical cancer image processing is also introduced.Subsequently, the paper contrasts the strengths and weaknesses of diverse deep learning techniques in cervical cancer image processing and deliberates the challenges and future trajectories of development within this domain. © 2024 SPIE.

  Affiliations:(1) Changchun University of Science and Technology, 7089 Weixing Road, Jilin Province, Changchun City, China; (2) The Second Norman Bethune Hospital of Jilin University, No.218 Ziqiang Street, Nanguan District, Jilin Province, Changchun City, China; (3) Xi'an Institute of Optics and Precision Mechanics of CAS, No.17, Information Avenue, New Industrial Park, Gaoxin District, Xi'an, China

  Publication Year:2024

  Volume:13180

  Article Number:1318014

  DOI Link:10.1117/12.3033802

  数据库ID（收录号）:20250417735943
• Record 125 of
  
  Title:Influence of nutating deflection on fiber coupling efficiency for fiber optic nutator
  
  Author Full Names:Peng, Bo(1,2,3); Ruan, Ping(1,3); Wang, Xingfeng(1,3); Han, Junfeng(1,3); Chang, Zhiyuan(1,3); Han, Jingyu(1,2,3)

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

  Language:English

  Document Type:Conference article (CA)

  Conference Title:2023 Advanced Fiber Laser Conference, AFL 2023

  Conference Date:November 10, 2023 - November 12, 2023

  Conference Location:Shenzhen, China

  Conference Sponsor:Chinese Society for Optical Engineering

  Abstract:In the relay optics of the space laser communication terminal's Acquisition, Pointing, and Tracking (APT) system, the Fiber Optic Nutator (FON), based on a Piezoelectric Ceramic Tube (PCT), is capable of actively achieving signal light reception and coupling through the implementation of energy feedback compensation algorithms with a lightweight design approach. Throughout the fiber nutation process, the deflection amplitude of the receiving fiber's end face significantly impacts the fiber coupling efficiency of the fiber optic nutator. To quantify this influence, the curve depicting the effect of the relative aperture (D/f) of the relay optics focusing lens on fiber coupling efficiency is initially computed. Notably, when D/f=0.213, the fiber coupling efficiency attains its theoretical maximum of 0.813. Subsequently, the composite motion of the fiber end face in three-dimensional space is deconstructed into radial and axial translations, along with rotations based on the axial direction. Through meticulous simulation calculations, it is ascertained that the fiber coupling efficiency decreases by more than 5% when the radial displacement r of the fiber end face exceeds 3.65μm, or when the axial displacement d surpasses 0.25mm, or when the angular deviation θ exceeds 0.08°. These findings offer quantifiable criteria for the dimensional selection of the PCT under varied application conditions, providing constructive guidance for determining core structural design parameters of the fiber optic nutator. © COPYRIGHT SPIE.

  Affiliations:(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) Key Laboratory of Space Precision Measurement Technology, Xi an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi an; 710119, China

  Publication Year:2024

  Volume:13104

  Article Number:1310450

  DOI Link:10.1117/12.3023648

  数据库ID（收录号）:20241816027629
• Record 126 of
  
  Title:Impact angle controlled integrated guidance and control with input and state constraints
  
  Author Full Names:Liang, Lecheng(1); Zhao, Bin(1); Zhou, Jun(1); Zhang, Zihao(2)

  Source Title:International Journal of Control

  Language:English

  Document Type:Journal article (JA)

  Abstract:A novel integrated guidance and control scheme is derived for STT missile with strict constraints as desired impact angle, input saturation and partial system state in three-dimensional space. The backstepping technique and command filter are adopted for achieving input constraints, and the improved compensation signals are constructed to correct tracking errors. The integral barrier Lyapunov function is introduced to prevent the partial system states from exceeding a predefined interval. A modified extended state observer is employed to strengthen the robustness of the system further. Theoretically, the required properties of a closed-form system are proved by Lyapunov theory in detail. Numerical simulations are conducted to exhibit the performance and robustness of the IGC scheme fully. © 2023 Informa UK Limited, trading as Taylor & Francis Group.

  Affiliations:(1) Institute of Precision Guidance and Control, Northwestern Polytechnical University, Xi'an, China; (2) Science and Technology on Electro-Optical Information Security Control Laboratory, Tianjin, China

  Publication Year:2024

  Volume:97

  Issue:4

  Start Page:796-810

  DOI Link:10.1080/00207179.2023.2175408

  数据库ID（收录号）:20231013679069
• Record 127 of
  
  Title:Noncollinear phase matching and effective nonlinear coefficient calculations for biaxial crystal out of the principal plane
  
  Author Full Names:Xing, Dingding(1,2); Yi, Dongchi(1); Yuan, Suochao(3); Chen, Xiaoyi(1); Da, Zhengshang(1)

  Source Title:Applied Physics B: Lasers and Optics

  Language:English

  Document Type:Journal article (JA)

  Abstract:The essential factor in laser frequency conversion involves phase matching within nonlinear optical crystals. To our knowledge, few studies have investigated the noncollinear phase matching calculation for biaxial crystal out of the principal plane. In this paper, we propose an arbitrary direction phase matching model and a computational method based on gradient descent (GD) algorithm, which can be applied to noncollinear in the principal plane, collinear and noncollinear out of the principal plane. In the case of 1053 nm third harmonic generation (THG) in LiB3O5 (LBO) crystal, the phase matching conditions are converted into a system of nonlinear equations with six variables and six equations, which can be solved by iterative optimization search with the GD algorithm and includes type-I (ss-f) and type-II (fs-f). We reveal the relationship of phase matching angles and effective nonlinear coefficients (deff) for various structures. Our method uncovers the existence of many solutions in the non-principal plane with γ > 8° and the deff close to the maximum value 0.66834 pm/V at θ = 90°, φ = 141.84° and γ = 0. The resolution of the arbitrary direction phase matching problem holds significant importance, as it expands the possibilities for laser frequency conversion, especially for noncollinear structures. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2024.

  Affiliations:(1) The Advanced Optical Instrument Research Department, 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) College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi’an; 710021, China

  Publication Year:2024

  Volume:130

  Issue:6

  Article Number:109

  DOI Link:10.1007/s00340-024-08247-4

  数据库ID（收录号）:20242316215773
• Record 128 of
  
  Title:A systematic study on linear thermal expansion coefficient of metals based on interferometric measurement with Fresnel bimirror
  
  Author Full Names:Lu, Sifan(1); Zhao, Wenyu(1); Lin, Jia(1); Zhao, Xiaorui(1); Xu, Ruoyu(1); Bai, Jin(1); Sun, Chunyan(1,2,3)

  Source Title:Microwave and Optical Technology Letters

  Language:English

  Document Type:Journal article (JA)

  Abstract:Linear thermal expansion coefficient, which is vital for measuring the thermal expansion characteristics of metals, has been attracting considerable attention globally. Herein, a novel design based on Fresnel bimirror has been developed. In this design, when the upper end of the object to be measured comes in contact with a tilted double-sided mirror, the temperature rises and intersection angle of the Fresnel bimirror decreases. Meanwhile, interference fringe spacing becomes narrower, while the number of fringes increases. An imaging system based on a digital microscope and smartphone is also incorporated in this design, which records the changes in the interference fringes. Then, using a self-programmed software, the linear thermal expansion coefficients of Cu, Fe, and Al samples are determined at elevated temperatures as 17.85 ± 0.23 × 10−6/°C ((Formula presented.)), 11.8 ± 0.09 × 10−6/°C ((Formula presented.)), and 23.34 ±0.16 × 10−6/°C ((Formula presented.)), respectively, with a relative error of less than 1.6%. A cooling process is also designed, and the average value of the linear thermal expansion coefficient of metal samples during heating and cooling conditions is determined. The measurement results obtained via the finite-method simulation demonstrate the feasibility and reliability of the system. Overall, this study provides a new idea for measuring the linear thermal expansion coefficient of metals. © 2024 Wiley Periodicals LLC.

  Affiliations:(1) School of Mathematics and Physics, Anqing Normal University, Anqing, China; (2) State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xi'an, China; (3) Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Science, Hefei, China

  Publication Year:2024

  Volume:66

  Issue:5

  Article Number:e34178

  DOI Link:10.1002/mop.34178

  数据库ID（收录号）:20242016085779
• Record 129 of
  
  Title:Method of design and optimization process of variable curvature mirror with variable thickness distribution
  
  Author Full Names:Xie, Xiaopeng(1); Zou, Gangyi(1); Xu, Liang(2); Yang, Mingyang(1); Xia, Siyu(1); Li, Chuang(1); Fan, Wenhui(3); Fan, Xuewu(1); Zhao, Hui(1)

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

  Language:English

  Document Type:Conference article (CA)

  Conference Title:Optical Design and Testing XIV 2024

  Conference Date:October 13, 2024 - October 15, 2024

  Conference Location:Nantong, China

  Conference Sponsor:Chinese Optical Society (COS); The Society of Photo-Optical Instrumentation Engineers (SPIE)

  Abstract:In this paper, a whole general design and optimization process is detailedly demonstrated by taking the design and optimization of a 55mm diameter variable curvature mirror(VCM) with a cycloid-like thickness distribution as example. The finite-element analysis to the VCM under each change of main structure parameter is done and analyzed to choose the proper parameter value of each structure to obtain the optimum surface figure accuracy. Finally, the designed VCM can achieve 0.386mm central deflection and RMS 82.84nm within the effective aperture 28.4mm. © 2024 SPIE.

  Affiliations:(1) Space Optical Technology Research Department, Xi’an Institute of Optics and Precision Mechanics, CAS, Xi’an; 710119, China; (2) Advanced Optics Manufacturing Center, Xi’an Institute of Optics and Precision Mechanics, CAS, Xi’an; 710119, China; (3) State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, CAS, Xi’an; 710119, China

  Publication Year:2024

  Volume:13237

  Article Number:1323714

  DOI Link:10.1117/12.3035424

  数据库ID（收录号）:20250417767853
• Record 130 of
  
  Title:Optimization of signal-to-noise ratio of laser heterodyne radiometer
  
  Author Full Names:Sun, Chunyan(1,2,3); He, Xinyu(1); Xu, Ruoyu(1); Lu, Sifan(1); Pan, Xueping(1); Bai, Jin(1)

  Source Title:Microwave and Optical Technology Letters

  Language:English

  Document Type:Journal article (JA)

  Abstract:The ground-based laser heterodyne radiometer (LHR), which exhibits the advantages of small size, high spectral resolution, and easy integration, has been used for the remote sensing detection of several gases to meet a wide range of needs. This study aims to optimize the laser heterodyne system for detecting CO2 gas by focusing on existing research. Firstly, using the all-fiber laser heterodyne detection system built by our research group, the power spectrum associated with the radio frequency signals of the detection system is discussed under different conditions: under no irradiation, under sunlight only, under sunlight and laser irradiation at the absorption peak, and under a filter in the spectrum range of 185–270 MHz. Signal-to-noise ratios (SNRs) of the high-resolution spectrum have been obtained using different filter bands of 185–270, 225–270, and 225–400 MHz. Finally, the filter in the 225–270 MHz band, which has the highest SNR, is selected. Consequently, the resolution is improved and the system is further optimized. Furthermore, an optical fiber attenuator is used to change the power of the local oscillator light entering the system, and hyperspectral spectra with varying percentages of input energy and total energy are obtained. When the laser attenuation reaches 40%, the optimal SNR of the system is 486 and can be further improved to meet the expected requirements. This study will provide insights for improving the applicability of laser heterodyne technology in atmospheric sounding. © 2023 Wiley Periodicals LLC.

  Affiliations:(1) School of Mathematics and Physics, Anqing Normal University, Anqing, China; (2) State Key Laboratory of Transient Optics and Photonics, Chinese Academy of Sciences, Xi'an, China; (3) Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Science, Hefei, China

  Publication Year:2024

  Volume:66

  Issue:1

  Article Number:e33857

  DOI Link:10.1002/mop.33857

  数据库ID（收录号）:20233714728857
• Record 131 of
  
  Title:A frequency-response-optimized Shack-Hartmann zonal wavefront reconstructor based on Fan's model
  
  Author Full Names:Fan, Yao(1,2,3,4); Duan, Yaxuan(1,3,4); Da, Zhengshang(1,3,4); Yue, Yang(2)

  Source Title:Review of Scientific Instruments

  Language:English

  Document Type:Journal article (JA)

  Abstract:This paper introduces an optimized method for zonal wavefront reconstruction utilizing Fan’s model, specifically tailored to enhance the frequency response. Analysis of the system frequency response demonstrates a 27% increase in bandwidth compared to the Southwell model. Examination of reconstruction errors at various frequency points reveals consistently smaller values when compared to the Southwell model. Validation through numerical simulations and real experiments underscores the superior performance of the proposed reconstructor, particularly noticeable at higher response levels within the mid- and high-frequency domains. © 2024 Author(s).

  Affiliations:(1) Advanced Optical Instrument Laboratory, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an; 710119, China; (2) School of Information and Communications Engineering, Xi’an Jiaotong University, Xi’an; 710049, China; (3) University of Chinese Academy of Sciences, Xi’an; 710119, China; (4) Xi’an Key Laboratory of High Power Laser Measurement Technology and Instrument, Xi’an; 710119, China

  Publication Year:2024

  Volume:95

  Issue:5

  Article Number:055004

  DOI Link:10.1063/5.0197071

  数据库ID（收录号）:20242116106971
• Record 132 of
  
  Title:Hybrid Space Calibrated 3D Network of Diffractive Hyperspectral Optical Imaging Sensor
  
  Author Full Names:Fan, Hao(1,2); Li, Chenxi(1); Gao, Bo(1,2); Xu, Huangrong(1); Chen, Yuwei(1,2); Zhang, Xuming(3); Li, Xu(3); Yu, Weixing(1,2)

  Source Title:Sensors

  Language:English

  Document Type:Journal article (JA)

  Abstract:Diffractive multispectral optical imaging plays an essential role in optical sensing, which typically suffers from the image blurring problem caused by the spatially variant point spread function. Here, we propose a novel high-quality and efficient hybrid space calibrated 3D network "HSC3D" for spatially variant diffractive multispectral imaging that utilizes the 3D U-Net structure combined with space calibration modules of magnification and rotation effects to achieve high-accuracy eight-channel multispectral restoration. The algorithm combines the advantages of the space calibrated module and U-Net architecture with 3D convolutional layers to improve the image quality of diffractive multispectral imaging without the requirements of complex equipment modifications and large amounts of data. A diffractive multispectral imaging system is established by designing and manufacturing one diffractive lens and four refractive lenses, whose monochromatic aberration is carefully corrected to improve imaging quality. The mean peak signal-to-noise ratio and mean structural similarity index of the reconstructed multispectral images are improved by 3.33 dB and 0.08, respectively, presenting obviously improved image quality compared with a typical Unrolled Network algorithm. The new algorithm with high space calibrated ability and imaging quality has great application potential in diffraction lens spectroscopy and paves a new method for complex practical diffractive multispectral image sensing. © 2024 by the authors.

  Affiliations:(1) Key Laboratory of Spectral Imaging Technology of Chinese Academy of Sciences, Xi’an Institute of Optics and Precision Mechanics, Xi’an; 710119, China; (2) Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing; 100049, China; (3) Department of Applied Physics, Hong Kong Polytechnic University, Hongkong; 999077, Hong Kong

  Publication Year:2024

  Volume:24

  Issue:21

  Article Number:6903

  DOI Link:10.3390/s24216903

  数据库ID（收录号）:20244617355301