2024

• Record 145 of
  
  Title:Spherical Superpixel Segmentation with Context Identity and Contour Intensity
  
  Author Full Names:Liao, Nannan; Guo, Baolong; He, Fangliang; Li, Wenxing; Li, Cheng; Liu, Hui

  Source Title:SYMMETRY-BASEL

  Language:English

  Document Type:Article

  Abstract:Superpixel segmentation is a popular preprocessing tool in the field of image processing. Nevertheless, conventional planar superpixel generation algorithms are inadequately suited for segmenting symmetrical spherical images due to the distinctive geometric differences. In this paper, we present a novel superpixel algorithm termed context identity and contour intensity (CICI) that is specifically tailored for spherical scene segmentation. By defining a neighborhood range and regional context identity, we propose a symmetrical spherical seed-sampling method to optimize both the quantity and distribution of seeds, achieving evenly distributed seeds across the panoramic surface. Additionally, we integrate the contour prior to superpixel correlation measurements, which could significantly enhance boundary adherence across different scales. By implementing the two-fold optimizations on the non-iterative clustering framework, we achieve synergistic CICI to generate higher-quality superpixels. Extensive experiments on the public dataset confirm that our work outperforms the baselines and achieves comparable results with state-of-the-art superpixel algorithms in terms of several quantitative metrics.

  Addresses:[Liao, Nannan; Guo, Baolong; He, Fangliang; Li, Wenxing; Liu, Hui] Xidian Univ, Inst Intelligent Control & Image Engn, Xian 710071, Peoples R China; [Li, Cheng] Chinese Acad Sci, Xian Inst Opt & Precis Mech, Xian 710119, Peoples R China

  Affiliations:Xidian University; Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CAS

  Publication Year:2024

  Volume:16

  Issue:7

  Article Number:925

  DOI Link:http://dx.doi.org/10.3390/sym16070925

  数据库ID（收录号）:WOS:001277532600001
• Record 146 of
  
  Title:Real-Time Registration of Unmanned Aerial Vehicle Hyperspectral Remote Sensing Images Using an Acousto-Optic Tunable Filter Spectrometer
  
  Author Full Names:Liu, Hong; Hu, Bingliang; Hou, Xingsong; Yu, Tao; Zhang, Zhoufeng; Liu, Xiao; Liu, Jiacheng; Wang, Xueji

  Source Title:DRONES

  Language:English

  Document Type:Article

  Keywords Plus:IMPROVED SURF; ALGORITHM; DETECTOR

  Abstract:Differences in field of view may occur during unmanned aerial remote sensing imaging applications with acousto-optic tunable filter (AOTF) spectral imagers using zoom lenses. These differences may stem from image size deformation caused by the zoom lens, image drift caused by AOTF wavelength switching, and drone platform jitter. However, they can be addressed using hyperspectral image registration. This article proposes a new coarse-to-fine remote sensing image registration framework based on feature and optical flow theory, comparing its performance with that of existing registration algorithms using the same dataset. The proposed method increases the structure similarity index by 5.2 times, reduces the root mean square error by 3.1 times, and increases the mutual information by 1.9 times. To meet the real-time processing requirements of the AOTF spectrometer in remote sensing, a development environment using VS2023+CUDA+OPENCV was established to improve the demons registration algorithm. The registration algorithm for the central processing unit+graphics processing unit (CPU+GPU) achieved an acceleration ratio of similar to 30 times compared to that of a CPU alone. Finally, the real-time registration effect of spectral data during flight was verified. The proposed method demonstrates that AOTF hyperspectral imagers can be used in real-time remote sensing applications on unmanned aerial vehicles.

  Addresses:[Liu, Hong; Hu, Bingliang; Yu, Tao; Zhang, Zhoufeng; Liu, Xiao; Liu, Jiacheng; Wang, Xueji] Chinese Acad Sci, Xian Inst Opt & Precis Mech, Xian 710119, Peoples R China; [Liu, Hong; Hou, Xingsong] Xi An Jiao Tong Univ, Sch Elect & Informat Engn, Xian 710049, Peoples R China; [Liu, Hong; Hu, Bingliang; Yu, Tao; Zhang, Zhoufeng; Liu, Xiao; Liu, Jiacheng; Wang, Xueji] Chinese Acad Sci, Key Lab Spectral Imaging Technol, Xian 710119, Peoples R China; [Liu, Hong; Hu, Bingliang; Yu, Tao; Liu, Jiacheng] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

  Affiliations:Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CAS; Xi'an Jiaotong University; Chinese Academy of Sciences; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS

  Publication Year:2024

  Volume:8

  Issue:7

  Article Number:329

  DOI Link:http://dx.doi.org/10.3390/drones8070329

  数据库ID（收录号）:WOS:001278885100001
• Record 147 of
  
  Title:Design, Simulation, and Characterization of a Partial Negative Curvature Antiresonant Hollow-Core Fiber for Low Loss Terahertz Wave Transmission
  
  Author Full Names:Mu, Qiyuan; Zhu, Yuanfeng; Kong, Depeng; He, Zhengquan; Liu, Hongjun; Wang, Lili

  Source Title:IEEE TRANSACTIONS ON TERAHERTZ SCIENCE AND TECHNOLOGY

  Language:English

  Document Type:Article

  Keywords Plus:FABRICATION

  Abstract:This article demonstrates a novel partial negative curvature hollow-core fiber for low-loss terahertz transmission. In the optimized fiber structure, the tubes in the vertical direction are replaced by plate-like dielectric sheets, thereby achieving low loss and low blocked risk of 3D printing, while retaining a small fiber hollow core and fiber diameter. The 3D printed fiber is characterized by a terahertz time-domain spectroscopy system. The obtained transmission spectrum demonstrates the mode beating phenomenon and its peak position varies periodically with fiber length at short distances. The thin antiresonant walls endow the fiber with two broad low-loss windows of 0.2-0.4 THz and 0.55-0.85 THz. Besides, the x-polarization and y-polarization waves achieve minimum losses of 16.2 dB/m@0.28 THz and 16.0 dB/m@0.29 THz, respectively. Furthermore, our fiber has low experimental dispersions, namely -0.18 +/- 1.1 ps/THz/cm (x-pol) and 0.67 +/- 0.77 ps/THz/cm (y-pol). The experimental losses and dispersions match well with the simulation results. Additionally, the simulation results reveal that the fiber has the potential to attain a high birefringence of 10(-3).

  Addresses:[Mu, Qiyuan; Kong, Depeng; He, Zhengquan; Liu, Hongjun; Wang, Lili] Chinese Acad Sci, Xian Inst Opt & Precis Mech, State Key Lab Transient Opt & Photon, Xian 710119, Peoples R China; [Mu, Qiyuan] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 101408, Peoples R China; [Zhu, Yuanfeng] Jiangxi Normal Univ, Sch Phys & Commun Elect, Nanchang 330022, Peoples R China

  Affiliations:Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CAS; State Key Laboratory of Transient Optics & Photonics; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Jiangxi Normal University

  Publication Year:2024

  Volume:14

  Issue:4

  Start Page:510

  End Page:518

  DOI Link:http://dx.doi.org/10.1109/TTHZ.2024.3393609

  数据库ID（收录号）:WOS:001263719100012
• Record 148 of
  
  Title:Design of an Airborne Low-Light Imaging System Based on Multichannel Optical Butting
  
  Author Full Names:Peng, Jianwei; Yang, Hongtao; Lei, Yangjie; Yu, Wanrong; Chen, Weining; Zhang, Guangdong

  Source Title:PHOTONICS

  Language:English

  Document Type:Article

  Keywords Plus:CONTRAST ENHANCEMENT

  Abstract:For the purpose of achieving long-range, high-resolution, and ultra-wide-swath airborne earth imaging at extremely low-light levels (0.01 Lux), a low-light imaging system built on multi-detector optical butting was researched. Having decomposed the system's specifications and verified its low-light imaging capability, we proposed to employ an optical system with a large relative aperture and low distortion and achieve imaging through the field-of-view (FOV) butting facilitated by eight 1080P high-sensitivity scientific complementary metal-oxide semiconductor (SCMOS) detectors. This paper elaborates on the design concept of the mechanical configuration of the imaging system; studies the calculation method of the structural parameters of the reflection prism; provides mathematical expressions for geometric parameters, such as the length and width of the splicing prism; and designs in detail the splicing structure of six reflection prisms for eight-channel beam splitting. Based on the design and computational results, a high-resolution, wide-swath imaging system for an ambient illuminance of 0.01 Lux was developed. Exhibiting a ground sampling distance (GSD) of 0.5 m (at a flight height of 5 km), this low-light imaging system keeps the FOV overlap ratio between adjacent detectors below 3% and boasts an effective image resolution of 4222 x 3782. The results from flight testing revealed that the proposed imaging system is capable of generating wide-swath, high-contrast resolution imagery under airborne and low-light conditions. As such, the way the system is prepared can serve as a reference point for the development of airborne low-light imaging devices.

  Addresses:[Peng, Jianwei; Yang, Hongtao; Lei, Yangjie; Yu, Wanrong; Chen, Weining; Zhang, Guangdong] Xian Inst Opt & Precis Mech CAS, Xian 710119, Peoples R China; [Peng, Jianwei; Yu, Wanrong] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

  Affiliations:Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS

  Publication Year:2024

  Volume:11

  Issue:7

  Article Number:636

  DOI Link:http://dx.doi.org/10.3390/photonics11070636

  数据库ID（收录号）:WOS:001277193900001
• Record 149 of
  
  Title:Tunable band-stop fiber filter based on laser-induced graphene metamaterial in THz frequency
  
  Author Full Names:Tian, Ziping; Luo, Zhenyang; Lv, Xianpeng; Xie, Manyan; Peng, Gangding; Kong, Depeng; Lu, Huihui; Guan, Heyuan

  Source Title:OPTICS EXPRESS

  Language:English

  Document Type:Article

  Abstract:As an important device in the application of terahertz (THz) technology, a THz filter has broad application prospects in the fields of THz communication, imaging, and sensing. In this paper, a THz filter based on grating structure laser-induced graphene (LIG)/ side polishing terahertz fiber composite structure is proposed. In the experiment, we achieved the maximum Q factor of 23.83 at the central resonant frequency of 0.715 THz. By modifying the grating structure, a tunable operational span of 269 GHz was achieved, along with a tunable range of 21 GHz through laser stimulation. In testing, we found that LIG materials prepared with circular filling are more sensitive to relatively high-power pump lasers, while LIG samples prepared with line filling exhibit better linear response to laser power. Furthermore, the compact and highly integrated nature of the device suggests its broad potential utility in the realm of THz frequency selection. (c) 2024 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement

  Addresses:[Tian, Ziping; Luo, Zhenyang; Lv, Xianpeng; Xie, Manyan] Jinan Univ, Dept Optoelect Engn, Guangdong Prov Key Lab Opt Fiber Sensing & Commun, Guangzhou 510632, Peoples R China; [Peng, Gangding] Univ New South Wales, Sch Elect Engn & Telecommun, Sydney, NSW 2052, Australia; [Kong, Depeng] Chinese Acad Sci, State Key Lab Transient Opt & Photon, Xian Inst Opt & Precis Mech, Xian 710119, Shaanxi, Peoples R China; [Lu, Huihui; Guan, Heyuan] Jinan Univ, Guangdong Higher Educ Inst, Key Lab Optoelect Informat & Sensing Technol, Guangzhou 510632, Guangdong, Peoples R China

  Affiliations:Jinan University; University of New South Wales Sydney; Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CAS; State Key Laboratory of Transient Optics & Photonics; Jinan University

  Publication Year:2024

  Volume:32

  Issue:14

  DOI Link:http://dx.doi.org/10.1364/OE.527472

  数据库ID（收录号）:WOS:001278859200002
• Record 150 of
  
  Title:Design of U-Shaped Frame of Spaceborne Turntable Based on Multi-Constraint Topology Optimization Method
  
  Author Full Names:Wang, Jiahao; Ruan, Ping; Xie, Youjin; Han, Jingyu; Peng, Bo; Qu, Yun

  Source Title:APPLIED SCIENCES-BASEL

  Language:English

  Document Type:Article

  Abstract:The spaceborne turntable is a piece of precision optical equipment utilized for monitoring space information and facilitating laser communication. The measurement accuracy of optical instruments is correlated to some extent with the mechanical properties of the structure. Addressing the design challenge posed by the U-frame in the spaceborne optoelectronic tracking and pointing turntable, this paper proposes a multi-constraint topology optimization method utilizing Abaqus/CAE and TOSCA. This method offers insights for U-frame design and has undergone scientific validation. Initially, the empirical design structure is established, optimization design areas are defined, and the initial model undergoes pre-processing in Abaqus/CAE. Subsequently, conceptual and mathematical models for topology optimization are developed, with the objective of minimizing structural compliance (thereby maximizing stiffness), and including constraints related to volume fraction, first-order natural frequency, and stress. Utilizing TOSCA, the U-frame topology optimization design is finalized, resulting in an optimized conceptual model. A comparative analysis of the optimized design against the empirical design structure demonstrates a significant 27.53% reduction in maximum stress, enhanced static stiffness, an increase of 11.48% in the first natural frequency, and a 4.3% reduction in mass. Moreover, the turntable that utilizes the optimized design structure not only meets reliability requirements in spacecraft structural design but also provides a stable platform for precise optical load alignment. The static and dynamic performance of the optimized U-frame has been enhanced, effectively mitigating the impact of external excitation on optical instrument measurement accuracy and meeting the lightweight design requirements for the U-frame, thus demonstrating the efficacy of the topology optimization method. This research offers valuable insights into U-frame design for spaceborne optoelectronic tracking and pointing turntables and carries significant guiding implications.

  Addresses:[Wang, Jiahao; Ruan, Ping; Xie, Youjin; Han, Jingyu; Peng, Bo; Qu, Yun] Chinese Acad Sci, Key Lab Space Precis Measurement Technol, Xian Inst Opt & Precis Mech, Xian 710119, Peoples R China; [Wang, Jiahao; Han, Jingyu; Peng, Bo] Univ Chinese Acad Sci, Sch Optoelect, Beijing 100049, Peoples R China

  Affiliations:Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS

  Publication Year:2024

  Volume:14

  Issue:13

  Article Number:5842

  DOI Link:http://dx.doi.org/10.3390/app14135842

  数据库ID（收录号）:WOS:001269219300001
• Record 151 of
  
  Title:Finite Element Model Updating Method for Radio Telescope Antenna Based on Parameter Optimization with Surrogate Model
  
  Author Full Names:Wang, Shuo; Xiang, Binbin; Wang, Wei; Lian, Peiyuan; Zhao, Yongqing; Cui, Hanwei; Lin, Shangmin; Zhou, Jianping

  Source Title:APPLIED SCIENCES-BASEL

  Language:English

  Document Type:Article

  Keywords Plus:DESIGN

  Abstract:There are deviations between the radio telescope antenna finite element (FE) model, founded on the design stage, and the actual working antenna structure. The original FE model cannot accurately describe the antenna structure deformation characteristics under the environmental load, thereby compromising the accuracy of the active structural compensation. This article proposes an antenna FE model updating method founded on parameter optimization with a surrogate model. The updating method updates the modulus of elasticity parameters of different components of the antenna backup structure (BUS) to obtain finite element analysis (FEA) results consistent with the actual measurement of the antenna reflector surface shape. The surrogate model founded on the multi-quadratic radial basis function (RBF) improves the computational efficiency of FE model updating, replacing the complex and time-consuming finite element analysis and calculation process. This method is implemented on a radio telescope antenna with an aperture of 25 m. The results show a significant reduction in the mismatch between the antenna and the updated FE model. This method's calculation time is significantly reduced compared with the updating method without using the surrogate model, with the RBF surrogate model taking 1% of the time of the finite element model in the FEA calculations. The proposed method can improve the antenna FE model calculation accuracy and significantly enhance the efficiency of FE model updating calculations. Thus, it can offer a reference for antenna engineering practice.

  Addresses:[Wang, Shuo; Xiang, Binbin; Zhao, Yongqing; Cui, Hanwei; Zhou, Jianping] Xinjiang Univ, Coll Mech Engn, Urumqi 830047, Peoples R China; [Wang, Wei; Lian, Peiyuan] Xidian Univ, Sch Mechanoelect Engn, Xian 710071, Peoples R China; [Lin, Shangmin] Chinese Acad Sci, Xian Inst Opt & Precis Mech, Xian 710119, Peoples R China

  Affiliations:Xinjiang University; Xidian University; Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CAS

  Publication Year:2024

  Volume:14

  Issue:13

  Article Number:5620

  DOI Link:http://dx.doi.org/10.3390/app14135620

  数据库ID（收录号）:WOS:001269813800001
• Record 152 of
  
  Title:Precise Modeling and Analysis of Aviation Power System Reliability via the Aviation Power System Reliability Probability Network Model
  
  Author Full Names:Wang, Yao; Wang, Fengtao; Li, Shujuan; Zhang, Yongjie

  Source Title:AEROSPACE

  Language:English

  Document Type:Article

  Keywords Plus:ALL-ELECTRIC AIRCRAFT; FUTURE; DESIGN; SAFETY

  Abstract:This study addresses the challenges of accurately analyzing the reliability of aviation power systems (APS) using traditional models by introducing the Aviation Power System Reliability Probability Network Model (APS-RPNM). The model directly transforms the system architecture into an equivalent probability network, aiming to develop a precise reliability model that captures system functions and fault logic. By classifying APS components into five distinct structural patterns and mapping them to corresponding nodes in the APS-RPNM, the model is successfully constructed. Specifically, None-Input-to-Multiple-Output components are transformed into two-state nodes, while Multiple-Input-to-None-Output, Single-Input-to-Multiple-Output, and Multiple-Input-to-Single-Output components are mapped to three-state nodes. For Multiple-Input-to-Multiple-Output components, a novel approach employing multiple two-state sub-nodes is adopted to capture their complex functional logic. A case study comparing the performance of the APS-RPNM with the traditional minimal path set method in reliability analysis was conducted. The results demonstrate that the APS-RPNM not only simplifies the model construction process and eliminates errors stemming from subjective engineering judgments but also enables the efficient computation of power supply reliability for all load points in a single inference by integrating all of the components. This significantly improves computational efficiency and system dependency analysis capabilities, highlighting the APS-RPNM's tremendous potential in optimizing the reliability design of APS.

  Addresses:[Wang, Yao; Li, Shujuan] Xian Univ Technol, Sch Mech & Precis Instrument Engn, Xian 710048, Peoples R China; [Wang, Fengtao] Chinese Acad Sci, Xian Inst Opt & Precis Mech XIOPM, Xian 710119, Peoples R China; [Zhang, Yongjie] Northwestern Polytech Univ, Coll Civil Aviat, Xian 710072, Peoples R China

  Affiliations:Xi'an University of Technology; Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CAS; Northwestern Polytechnical University

  Publication Year:2024

  Volume:11

  Issue:7

  Article Number:530

  DOI Link:http://dx.doi.org/10.3390/aerospace11070530

  数据库ID（收录号）:WOS:001276683200001
• Record 153 of
  
  Title:Reconstructing the Colors of Underwater Images Based on the Color Mapping Strategy
  
  Author Full Names:Wu, Siyuan; Sun, Bangyong; Yang, Xiao; Han, Wenjia; Tan, Jiahai; Gao, Xiaomei

  Source Title:MATHEMATICS

  Language:English

  Document Type:Article

  Keywords Plus:RETINEX THEORY; ENHANCEMENT; WATER

  Abstract:Underwater imagery plays a vital role in ocean development and conservation efforts. However, underwater images often suffer from chromatic aberration and low contrast due to the attenuation and scattering of visible light in the complex medium of water. To address these issues, we propose an underwater image enhancement network called CM-Net, which utilizes color mapping techniques to remove noise and restore the natural brightness and colors of underwater images. Specifically, CM-Net consists of a three-step solution: adaptive color mapping (ACM), local enhancement (LE), and global generation (GG). Inspired by the principles of color gamut mapping, the ACM enhances the network's adaptive response to regions with severe color attenuation. ACM enables the correction of the blue-green cast in underwater images by combining color constancy theory with the power of convolutional neural networks. To account for inconsistent attenuation in different channels and spatial regions, we designed a multi-head reinforcement module (MHR) in the LE step. The MHR enhances the network's attention to channels and spatial regions with more pronounced attenuation, further improving contrast and saturation. Compared to the best candidate models on the EUVP and UIEB datasets, CM-Net improves PSNR by 18.1% and 6.5% and SSIM by 5.9% and 13.3%, respectively. At the same time, CIEDE2000 decreased by 25.6% and 1.3%.

  Addresses:[Wu, Siyuan; Sun, Bangyong; Yang, Xiao] Xian Univ Technol, Sch Comp Sci & Engn, Xian 710048, Peoples R China; [Wu, Siyuan; Sun, Bangyong] Chinese Acad Sci, Xian Inst Opt & Precis Mech, Key Lab Spectral Imaging Technol CAS, Xian 710119, Peoples R China; [Han, Wenjia] Qilu Univ Technol, Shandong Acad Sci, Key Lab Pulp & Paper Sci Technol, Minist Educ, Jinan 250353, Peoples R China; [Tan, Jiahai] Xian Technol Univ, Sch Optoelect Engn, Xian 710021, Peoples R China; [Gao, Xiaomei] Xian Mapping & Printing China Natl Adm Coal Geol, Xian 710199, Peoples R China

  Affiliations:Xi'an University of Technology; Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CAS; Qilu University of Technology; Xi'an Technological University

  Publication Year:2024

  Volume:12

  Issue:13

  Article Number:1933

  DOI Link:http://dx.doi.org/10.3390/math12131933

  数据库ID（收录号）:WOS:001269719800001
• Record 154 of
  
  Title:Fourier ptychographic microscopy with adaptive resolution strategy
  
  Author Full Names:Xu, Jinghao; Feng, Tianci; Wang, Aiye; Xu, Fannuo; Pan, An

  Source Title:OPTICS LETTERS

  Language:English

  Document Type:Article

  Abstract:Fourier ptychographic microscopy (FPM) is a method capable of reconstructing a high-resolution, wide field-of-view (FOV) image, where dark-field images provide the high- frequency information required for the iterative process. Theoretically, using more dark-field images can lead to results with higher resolution. However, the resolution required to clearly detect samples with different microscales varies. For certain samples, the limit resolution of the imaging system may exceed the one required to resolve the details. This suggests that simply increasing the number of dark- field images will not improve the recognition capability for such samples and may instead significantly increase the computational cost. To address this issue, this Letter proposes an adaptive resolution strategy that automatically assigns the resolution required for the sample. Based on a Tenengrad approach, this strategy determines the number of images required for reconstruction by evaluating a series of differential images among the reconstructions for a certain subregion and then efficiently completes the full-FOV reconstruction according to the determined resolution. We conducted the full-FOV reconstruction utilizing feature-domain FPM for both the USAF resolution test chart and a human red blood cell sample. Employing the adaptive resolution strategy, the preservation of reconstruction resolution can be ensured while respectively economizing approximately 76 degrees lc and 89 degrees lc of the time. (c) 2024 Optica Publishing Group

  Addresses:[Xu, Jinghao; Feng, Tianci; Wang, Aiye; Xu, Fannuo; Pan, An] Chinese Acad Sci, Xian Inst Opt & Precis Mech, Xian 710119, Peoples R China; [Xu, Jinghao; Feng, Tianci; Wang, Aiye; Xu, Fannuo; Pan, An] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

  Affiliations:Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS

  Publication Year:2024

  Volume:49

  Issue:13

  Start Page:3548

  End Page:3551

  DOI Link:http://dx.doi.org/10.1364/OL.525289

  数据库ID（收录号）:WOS:001294020800004
• Record 155 of
  
  Title:Analysis of laser interference backward stray light based on TianQin space gravitational wave detection
  
  Author Full Names:Yan, Haoyu; Chen, Qinfang; Ma, Zhanpeng; Wang, Hu

  Source Title:JOURNAL OF ASTRONOMICAL TELESCOPES INSTRUMENTS AND SYSTEMS

  Language:English

  Document Type:Article

  Abstract:According to the working principle of the telescope, we know that the telescope requires stray light from the system to reach the order of 10-10 of the output laser power. In this article, given the roughness of the M1 mirror of 3 angstrom and the roughness of the M2 similar to M4 mirror of 1.8 angstrom, through separate analysis of the four mirror surfaces, we found that M4 has the greatest impact on the backward stray light of the telescope, and as the angle of M4 incident light increases, the level of stray light in the system decreases; after adjusting the M4 incidence angle and considering only the roughness, the stray light level of the telescope system reaches 10-11 of the power of the outgoing laser, which meets the expected requirements. Subsequently, we calculated the impact of particle pollution on the stray light of the system, and based on our analysis results, we determined that the cleanliness level of the telescope testing and storage environment was better than 100. Then, we conducted surface defect calculations and obtained the surface defect requirements for M1 to M4, and it is concluded that as the scattering angle decreases, the main contribution of bidirectional reflectance distribution function (BRDF) changes from geometric optics to diffraction effects. Finally, we conducted actual measurements on the surface quality of the ultra-smooth mirror sample, and the measured BRDF value was substituted into the simulation analysis, resulting in a telescope stray light of 8.29x10-11, meeting the expected requirements.

  Addresses:[Yan, Haoyu; Chen, Qinfang; Ma, Zhanpeng; Wang, Hu] Chinese Acad Sci, Xian Inst Opt & Precis Mech, Xian, Peoples R China; [Yan, Haoyu; Wang, Hu] Univ Chinese Acad Sci, Beijing, Peoples R China; [Yan, Haoyu; Chen, Qinfang; Ma, Zhanpeng; Wang, Hu] Xian Space Sensor Opt Technol Engn Res Ctr, Xian, Peoples R China

  Affiliations:Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS

  Publication Year:2024

  Volume:10

  Issue:3

  DOI Link:http://dx.doi.org/10.1117/1.JATIS.10.3.034007

  数据库ID（收录号）:WOS:001326704600022
• Record 156 of
  
  Title:Generation of chiral optical vortex lattice for controlled aggregation of particles
  
  Author Full Names:Yang, X. B.; Zhang, H.; Tang, M. M.; Ma, H. X.; Tai, Y. P.; Li, X. Z.

  Source Title:APPLIED PHYSICS LETTERS

  Language:English

  Document Type:Article

  Keywords Plus:ORBITAL-ANGULAR-MOMENTUM; LIGHT; TRANSFORMATION; BEAMS

  Abstract:The chiral light field has attracted great attention owing to its interaction with chiral matter. The generation of chiral light fields with rich structures has become crucial as it can expand application scenarios. Herein, we introduce a chiral optical vortex lattice. As a whole, the optical vortex lattice has a chiral intensity distribution, with each spiral arm having sub-vortices (chiral phase). By using an expansion factor to adjust the involute of a circular lattice, this helical optical vortex lattice can be continuously varied from a circular lattice. The chirality of intensity and phase can be controlled independently. Furthermore, the optical tweezers using the lattice demonstrate the capability of sub-vortices to manipulate particle movement, with the chiral intensity determining the trajectory of particle motion. As the lattice possesses both intensity and phase chirality, it may also find potential applications in tasks such as chiral structure microfabrication.

  Addresses:[Yang, X. B.; Zhang, H.; Tang, M. M.; Tai, Y. P.; Li, X. Z.] Henan Univ Sci & Technol, Sch Chem & Chem Engn, Luoyang 471023, Peoples R China; [Yang, X. B.; Zhang, H.; Tang, M. M.; Ma, H. X.] Res Ctr Frontier Fundamental Studies, Zhejiang Lab, Hangzhou 471023, Peoples R China; [Tai, Y. P.; Li, X. Z.] Chinese Acad Sci, State Key Lab Transient Opt & Photon, Xian 311100, Peoples R China; [Tai, Y. P.; Li, X. Z.] Ctr Nonferrous New Mat & Adv Proc Technol, Prov & Ministerial Coconstruct Collaborat Innovat, State Key Lab Transient Opt & Photon, Luoyang 471023, Peoples R China; [Tai, Y. P.; Li, X. Z.] Prov & Ministerial Co Construct Collaborat Innovat, Luoyang 471023, Peoples R China

  Affiliations:Henan University of Science & Technology; Zhejiang Laboratory; State Key Laboratory of Transient Optics & Photonics; Chinese Academy of Sciences; Chinese Academy of Sciences

  Publication Year:2024

  Volume:125

  Issue:1

  Article Number:11106

  DOI Link:http://dx.doi.org/10.1063/5.0214498

  数据库ID（收录号）:WOS:001262969300011