2024

• Record 205 of
  
  Title:HQ-I2IT: Redesign the optimization scheme to improve image quality in CycleGAN-based image translation systems
  
  Author Full Names:Zhang, Yipeng(1,2,3); Hu, Bingliang(1,2); Huang, Yingying(1,2,3); Gao, Chi(1,2,3); Yin, Jianfu(1,2,3); Wang, Quang(1,2)

  Source Title:IET Image Processing

  Language:English

  Document Type:Journal article (JA)

  Abstract:The image-to-image translation (I2IT) task aims to transform images from the source domain into the specified target domain. State-of-the-art CycleGAN-based translation algorithms typically use cycle consistency loss and latent regression loss to constrain translation. In this work, it is demonstrated that the model parameters constrained by the cycle consistency loss and the latent regression loss are equivalent to optimizing the medians of the data distribution and the generative distribution. In addition, there is a style bias in the translation. This bias interacts between the generator and the style encoder and visually exhibits translation errors, e.g. the style of the generated image is not equal to the style of the reference image. To address these issues, a new I2IT model termed high-quality-I2IT (HQ-I2IT) is proposed. The optimization scheme is redesigned to prevent the model from optimizing the median of the data distribution. In addition, by separating the optimization of the generator and the latent code estimator, the redesigned model avoids error interactions and gradually corrects errors during training, thereby avoiding learning the median of the generated distribution. The experimental results demonstrate that the visual quality of the images produced by HQ-I2IT is significantly improved without changing the generator structure, especially when guided by the reference images. Specifically, the Fréchet inception distance on the AFHQ and CelebA-HQ datasets are reduced from 19.8 to 10.2 and from 23.8 to 17.0, respectively. © 2023 The Authors. IET Image Processing published by John Wiley & Sons Ltd on behalf of The Institution of Engineering and Technology.

  Affiliations:(1) Key Laboratory of Spectral Imaging Technology, Xi'an Institute of Optics and Precision Mechanics of the Chinese Academy of Sciences, Shaanxi, Xi'an, China; (2) The Key Laboratory of Biomedical Spectroscopy of Xi'an, Shaanxi, Xi'an, China; (3) School of Optoelectronics, University of Chinese Academy of Sciences, Beijing, China

  Publication Year:2024

  Volume:18

  Issue:2

  Start Page:507-522

  DOI Link:10.1049/ipr2.12965

  数据库ID（收录号）:20234314951511
• Record 206 of
  
  Title:Splicing Design Method and Accuracy Analysis of the U-shaped Frame
  
  Author Full Names:Han, Jingyu(1); Li, Xiangyu(2); Xie, Meilin(2); Hao, Wei(2); Lian, Xuezheng(2); Wang, Jie(1,2); Song, Wei(2); Ruan, Ping(2)

  Source Title:2024 5th International Conference on Mechatronics Technology and Intelligent Manufacturing, ICMTIM 2024

  Language:English

  Document Type:Conference article (CA)

  Conference Title:5th International Conference on Mechatronics Technology and Intelligent Manufacturing, ICMTIM 2024

  Conference Date:April 26, 2024 - April 28, 2024

  Conference Location:Hybrid, Nanjing, China

  Conference Sponsor:IEEE

  Abstract:The U-shaped frame is a crucial component of the theodolite. The coaxial accuracy of the bearing holes on both sides of the U-shaped frame directly affects the pitch-axis accuracy and further influences the angular measurement precision of the theodolite. The machining of the bearing holes on both sides of the U-shaped frame with a long span requires the use of methods such as a large-stroke boring machine or the assembly and adjustment of the frame's own structure. However, considering various factors such as the manufacturing cost, manufacturing time, and machining precision of the U-shaped frame, neither of the above methods is the optimal solution. This paper proposes a splicing design method for the U-shaped frame based on the principle of one side and two pins positioning. This method solves the problems of low coaxial accuracy and difficult machining of bearing holes in U-shaped frames with long spans. Through multiple splicing accuracy tests of the coaxiality of the bearing holes in a U-shaped frame with a span of 1500 mm, the average coaxiality error of the bearing holes is 0.023 mm, with a maximum value of 0.038 mm, which is less than the theoretical maximum coaxiality error of 0.058 mm. The coaxiality tolerance precision level is close to Grade 5, which meets the requirements for the use of high-precision theodolite. ©2024 IEEE.

  Affiliations:(1) University of Chinese Academy of Science, Beijing, China; (2) Key Laboratory of Space Precision Measurement Technology, Xi'an Institute of Optics and Precision Mechanics, CAS, Xi'an, China

  Publication Year:2024

  Start Page:15-19

  DOI Link:10.1109/ICMTIM62047.2024.10629508

  数据库ID（收录号）:20243616988986
• Record 207 of
  
  Title:Energy- and angle-resolved coherent control on photoelectron dynamics by a directionality orthogonal double-slit interferometry
  
  Author Full Names:Liu, Mingqing(1); Jiang, Wei-Chao(2)

  Source Title:Optics Express

  Language:English

  Document Type:Journal article (JA)

  Abstract:We propose a directionality orthogonal double-slit interferometry to control photoelectron dynamics in energy- and angle-resolved fashion. The two orthogonal components of polarization-skewed (PS) laser pulse, in which the total polarization vector rotates as time evolves, can be regarded as the double-slit in the time domain. Our results demonstrate that the peak splitting and shift in photoelectron momentum distributions can be controlled by the relative optical phase between two components of the PS pulse. Based on the analysis from time-dependent perturbation theory, the behaviors of photoelectrons in angle-integrated energy spectra between 1s and 2p initial states can be attributed to the significant discrepancy of an interference pattern, which is reflected in energy- and angle-dependent phase difference of transition amplitudes from two orthogonal components of PS pulse. In addition, the influences of time delay and intensity ratio between two subpulses on this coherent control are also discussed. Our work provides a feasible protocol for controlling photoelectron dynamics in energy and angular resolutions and enriches the potential applications of the double-slit interference in the time domain. © 2024 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.

  Affiliations:(1) School of Physics and Information Technology, Shaanxi Normal University, Xi’an; 710119, China; (2) Institute of Quantum Precision Measurement, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen; 518060, China

  Publication Year:2024

  Volume:32

  Issue:21

  Start Page:37703-37715

  DOI Link:10.1364/OE.537644

  数据库ID（收录号）:20244217188857
• Record 208 of
  
  Title:Rotating Dual-Retarders to Correct Polarization Measurement Error for Divided-of-Amplitude Polarimeter in Full Field of View
  
  Author Full Names:Jia, Wentao(1,2); Liu, Kai(1,2); Jiang, Kai(1,2); Shan, Qiusha(1,2); Duan, Jing(1,2); Wu, Linghao(3); Zhou, Liang(1,2)

  Source Title:SSRN

  Language:English

  Document Type:Preprint (PP)

  Abstract:The divided-of-amplitude polarimeter (DoAP) can measure the four Stokes parameters simultaneously, and has the advantages of snapshot and high spatial resolution. However, the residual polarization aberration (PA) of DoPA system will induce the polarization measurement error, and this error is related to the field of view. In this paper, the relationship between the measurement errors of Stokes parameters and the Mueller pupil is derived, and the Mueller pupil of DoPA system is obtained by 3D polarzation ray-tracing matrix. Then, a method of dual-retarders rotation is proposed to correct the Mueller pupil in full field of view. The simulation demonstrates the PA correction can improve the measurement accuracy of DoPA system, and the measurement error of degree of linear polarization is reduced by 11.5%, 38.2% and 11.8% at 0 degree, 10 degrees and 15 degrees field of view, respectively. This research enables high accuracy measurement of polarization signal for polarimeters. © 2024, The Authors. All rights reserved.

  Affiliations:(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; 710119, China; (3) Changzhou Institute of Technology, Changzhou; 213002, China

  Publication Year:2024

  DOI Link:10.2139/ssrn.4782054

  数据库ID（收录号）:20240142673
• Record 209 of
  
  Title:Parallel adaptive RBF neural network-based active disturbance rejection control for hybrid compensation of PMSM
  
  Author Full Names:Gao, Peng(1,2,3); Su, Xiuqin(1,4); Pan, Zhibin(2); Xiao, Maosen(1); Zhang, Wenbo(1,2,3)

  Source Title:Robotic Intelligence and Automation

  Language:English

  Document Type:Journal article (JA)

  Abstract:Purpose: This study aims to promote the anti-disturbance and tracking accuracy performance of the servo systems, in which a modified active disturbance rejection control (MADRC) scheme is proposed. Design/methodology/approach: An adaptive radial basis function (ARBF) neural network is utilized to estimate and compensate dominant friction torque disturbance, and a parallel high-gain extended state observer (PHESO) is employed to further compensate residual and other uncertain disturbances. This parallel compensation structure reduces the burden of single ESO and improves the response speed of permanent magnet synchronous motor (PMSM) to hybrid disturbances. Moreover, the sliding mode control (SMC) rate is introduced to design an adaptive update law of ARBF. Findings: Simulation and experimental results show that as compared to conventional ADRC and SMC algorithms, the position tracking error is only 2.3% and the average estimation error of the total disturbances is only 1.4% in the proposed MADRC algorithm. Originality/value: The disturbance parallel estimation structure proposed in MADRC algorithm is proved to significantly improve the performance of anti-disturbance and tracking accuracy. © 2024, Emerald Publishing Limited.

  Affiliations:(1) Chinese Academy of Sciences Xi'an Institute of Optics and Precision Mechanics, Xi'an, China; (2) School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an, China; (3) University of the Chinese Academy of Sciences, Beijing, China; (4) Pilot National Laboratory for Marine Science and Technology Qingdao, Qingdao, China

  Publication Year:2024

  Volume:44

  Issue:5

  Start Page:658-667

  DOI Link:10.1108/RIA-03-2023-0036

  数据库ID（收录号）:20243116800960
• Record 210 of
  
  Title:A 2λ×100 Gb/s Optical Receiver with Si-Photonic Micro-Ring Resonator and Photo-Detector for DWDM Optical-IO
  
  Author Full Names:Chen, Sikai(1); Xue, Jintao(2,3); Chen, Yihan(3); Gu, Yuean(3); Yin, Haoran(1,3); Bao, Shenlei(2,3); Li, Guike(1,3); Wang, Binhao(2,3); Qi, Nan(1,3)

  Source Title:Proceedings of the Custom Integrated Circuits Conference

  Language:English

  Document Type:Conference article (CA)

  Conference Title:44th Annual IEEE Custom Integrated Circuits Conference, CICC 2024

  Conference Date:April 21, 2024 - April 24, 2024

  Conference Location:Denver, CO, United states

  Abstract:The emerging AI computing system asks for high-speed, large-scale, and power-efficient interconnects. As the system scales-out reaching tens-of-meters, electrical links cannot support higher bandwidth (BW) at affordable power consumption. Silicon photonic (SiPh) technology enables the fabrication of both photonic integrated circuits (PIC) and electronic integrated circuits (EIC) on the same wafer. By integrating optical transceivers into the xPU package, fiber channels could be directly attached to the chip edge, building up the highly integrated optical-IO. SiPh micro-ring resonator (MRR) is an attractive solution due to small footprint and its capability of wavelength selection [1]-[3]. To fit more wavelengths into one full-spectral-range (FSR) of the MRR, dense wavelength-division multiplexing (DWDM) has been adopted, which brings design challenges on anti-aliasing and wavelength stabilizing. © 2024 IEEE.

  Affiliations:(1) Institute of Semiconductors Chinese Academy of Sciences (CAS), Beijing, China; (2) Xi'An Institute of Optics and Precision Mechanics, CAS, Xi'an, China; (3) University of Chinese Academy of Sciences, Beijing, China

  Publication Year:2024

  DOI Link:10.1109/CICC60959.2024.10529008

  数据库ID（收录号）:20242216153064
• Record 211 of
  
  Title:Scientific Studies on Beads Unearthed From the Rabat Cemetery, Uzbekistan
  
  Author Full Names:Wu, Chen(1); Liu, Song(2); Liang, Yun(3); Zhao, Feng-Van(1); Li, Qmg-Hur(3); Wang, Jian-Xin(3)

  Source Title:Guang Pu Xue Yu Guang Pu Fen Xi/Spectroscopy and Spectral Analysis

  Language:Chinese

  Document Type:Journal article (JA)

  Abstract:In 2017-2018. the China-Uzbekistan joint archaeological team conducted the excavations at the Rabat Cemetery at Boysun, Uzbekistan. 94 tombs were excavated. Preliminary archaeological studies have shown that the cemetery is a Yuezhi culture cemetery from the end of the 2nd century BC to the early 2nd century AD. with rich cultural factors, which provides important archaeological new data for the study of the ancient Yuezhi cultural features and the study of ancient culture from the 2nd century BC to the 2nd century AD in the North Bactria region. Over 1 . 500 pieces of beads and pendants in various textures were unearthed in Rabat cemetery, providing abundant research materials. In this study. 13 samples of typical synthetic silicate beads are analyzed by Optical Microscopy. Energy dispersive X-ray fluorescence spectroscopy. Scanning electron microscopy with energy dispersive spectromer. and laser Raman spectroscopy to figure out their chemical compositions and a part of the manufacturing technology. Moreover, possible provenances of these beads are discussed, combined with the morphological characteristics of specific samples found at this site. The results show that raw materials of the Rabat beads include sodium-rich faience, natron-based soda glass, plant-ash soda glass, hige-magnesia soda glass, mineral soda-alumina glass, plant ash soda- alumina glass and potash glass, and the productions cover Western Asia, the Mediterranean. Central Asian. India, Pakistan, and other regions. It argues that from the end of the 2nd century BC to the 2nd century AD. frequent economic exchanges and rich cultural interactions took place between the region of Rabat Cemetery and the areas of the Mediterranean. West Asia, and South Asia. © 2024 Science Press. All rights reserved.

  Affiliations:(1) Xi'an Institute of Conservation and Archaeology, Xi'an, 710068, China; (2) Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai; 201800, China; (3) School of Cultural Heritage, Northwest University, Xi'an, 710069, China

  Publication Year:2024

  Volume:44

  Issue:3

  Start Page:762-769

  DOI Link:10.3964/j.issn.1000-0593(2024)03-0762-08

  数据库ID（收录号）:20241115720104
• Record 212 of
  
  Title:Optimization of a large aperture wedge prism support system based on the closed-loop structural-thermal-optical performance method
  
  Author Full Names:Wen, Wansha(1,2); Ruan, Ping(1,2); Li, Baopeng(1); Lv, Tao(1,2)

  Source Title:Optics Express

  Language:English

  Document Type:Journal article (JA)

  Abstract:In the instrument suite of the Thirty Meter Telescope (TMT), the linear atmospheric dispersion corrector (LADC) is positioned at the forefront of the spectrometer to mitigate atmospheric dispersion. The LADC comprises two large aperture wedge prisms, each approximately 1.5 meters in diameter. These prisms, which are transmissive optical elements, are supported radially along their outer circumferences. However, due to the rotational asymmetry of the prisms relative to the optical axis, the support forces do not align with the plane of the center of gravity, leading to a bending moment caused by gravitational and reaction forces. This misalignment results in significant deformation of the prism surfaces. The structural-thermal-optical performance integrated model method is typically employed to evaluate the impact of the support system on prism surface deformation. This process often involves extensive manual iterations and operates in an open-loop manner, making it inefficient and heavily reliant on the analyst’s expertise. To address these limitations, this paper proposes a closed-loop integrated model analysis optimization method aimed at enhancing optimization efficiency. By integrating interface programs between analysis tools and applying advanced optimization algorithms, the traditional open-loop integrated model analysis process is transformed into a closed-loop system, enabling more efficient and reliable optimization. The closed-loop integrated model method incorporates Optimal Latin Hypercube Design (Opt LHD) and Particle Swarm Optimization (PSO) algorithms to optimize the prism support structure, reducing the analysis time from one week to just two days. Compared to the original support structure, the root mean square (RMS) value of optical surface deformation decreased by 49.3%, from 155.0 nm to 78.6 nm, under gravity and 2°C temperature coupled conditions; and by 62.5%, from 289. 1 nm to 108. 4 nm, under gravity and 42°C temperature coupled conditions. These results demonstrate that the closed-loop integrated model optimization method not only improves efficiency but also achieves significantly better outcomes. © 2024 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.

  Affiliations:(1) Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, No. 17 Xinxi Road, Xi’an; 710119, China; (2) Key Laboratory of Space Precision Measurement Technology, Chinese Academy of Sciences, No. 17 Xinxi Road, Xi’an; 710119, China

  Publication Year:2024

  Volume:32

  Issue:23

  Start Page:40453-40466

  DOI Link:10.1364/OE.540266

  数据库ID（收录号）:20244717390386
• Record 213 of
  
  Title:Multi-object tracking by detecting small objects in satellite video
  
  Author Full Names:Cui, Haowen(1,2); Xu, Chujie(1,2); Zheng, Xiangtao(1); Lu, Xiaoqiang(1)

  Source Title:National Remote Sensing Bulletin

  Language:Chinese

  Document Type:Journal article (JA)

  Abstract:Multi-object tracking determines the position of an object and estimates the trajectory of objects in remote sensing satellite videos. This method has attracted considerable interest, and its application to security monitoring, motion analysis, and intelligent transportation has been explored. Compared with surveillance videos, remote sensing satellite videos contain smaller objects and a larger background, and thus the foreground object is difficult to detect. In addition, remote sensing satellite videos are extremely large, requiring massive computation and storage. Multi-object tracking in remote sensing satellite videos have high real-time requirements. Based on the mentioned problems, a multi-object tracking method for remote sensing satellite videos is proposed in this paper, which adopts tracking-by-detection paradigm. First, the backbone added a transformer that capture the global context information in the detection stage, enabling the detector to distinguish between objects and background. Then, an attention mechanism was used to enhance objects’features, enabling the proposed method to focus on the region of objects. Finally, an extra prediction branch was added to the network to generat a high-resolution feature map, which retained the details of small objects and was beneficial to small-object detection. Owing to the small objects and occlusion in remote sensing satellite videos, the confidence of hard positive samples was quite low. In the data association stage, an association strategy was adopted, which considered high and low confidence detection simultaneously and associated detected small objects with existing trajectories. To verify the effectiveness of the proposed method, ablation and comparison experiments were carried out on the remote sensing satellite videos dataset. The proposed method achieved 63.1% MOTA and 78.0% IDF1. The proposed method showed optimal performance, which reflected its suitability for multi-object tracking in remote sensing satellite videos. The proposed method ranked second in the multi-object tracking challenge of the 2021 Gaofen Challenge. The proposed method was dedicated to solving the difficulty of small-object tracking in remote sensing satellite videos, and some helpful methods for small-object tracking were used. Experimental results showed that the proposed method can improve the performance of multi-object tracking in remote sensing satellite videos. © 2024 Science Press. All rights reserved.

  Affiliations:(1) Key Laboratory of Spectral Imaging 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

  Publication Year:2024

  Volume:28

  Issue:7

  Start Page:1812-1821

  DOI Link:10.11834/jrs.20232098

  数据库ID（收录号）:20243016739213
• Record 214 of
  
  Title:Classification of Benign–Malignant Thyroid Nodules Based on Hyperspectral Technology
  
  Author Full Names:Wang, Junjie(1,2,3); Du, Jian(1,3); Tao, Chenglong(1,3); Qi, Meijie(1,3); Yan, Jiayue(1,2,3); Hu, Bingliang(1,3); Zhang, Zhoufeng(1,3)

  Source Title:Sensors

  Language:English

  Document Type:Journal article (JA)

  Abstract:In recent years, the incidence of thyroid cancer has rapidly increased. To address the issue of the inefficient diagnosis of thyroid cancer during surgery, we propose a rapid method for the diagnosis of benign and malignant thyroid nodules based on hyperspectral technology. Firstly, using our self-developed thyroid nodule hyperspectral acquisition system, data for a large number of diverse thyroid nodule samples were obtained, providing a foundation for subsequent diagnosis. Secondly, to better meet clinical practical needs, we address the current situation of medical hyperspectral image classification research being mainly focused on pixel-based region segmentation, by proposing a method for nodule classification as benign or malignant based on thyroid nodule hyperspectral data blocks. Using 3D CNN and VGG16 networks as a basis, we designed a neural network algorithm (V3Dnet) for classification based on three-dimensional hyperspectral data blocks. In the case of a dataset with a block size of 50 × 50 × 196, the classification accuracy for benign and malignant samples reaches 84.63%. We also investigated the impact of data block size on the classification performance and constructed a classification model that includes thyroid nodule sample acquisition, hyperspectral data preprocessing, and an algorithm for thyroid nodule classification as benign and malignant based on hyperspectral data blocks. The proposed model for thyroid nodule classification is expected to be applied in thyroid surgery, thereby improving surgical accuracy and providing strong support for scientific research in related fields. © 2024 by the authors.

  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 Biomedical Spectroscopy of Xi’an, Xi’an; 710119, China

  Publication Year:2024

  Volume:24

  Issue:10

  Article Number:3197

  DOI Link:10.3390/s24103197

  数据库ID（收录号）:20242216182048
• Record 215 of
  
  Title:Snapshot coherent diffraction imaging across ultra-broadband spectra
  
  Author Full Names:Li, Boyang(1); Xiao, Zehua(1); Yuan, Hao(1,2); Huang, Pei(1); Cao, Huabao(1,2); Wang, Hushan(1,2); Zhao, Wei(1); Fu, Yuxi(1,2)

  Source Title:Photonics Research

  Language:English

  Document Type:Journal article (JA)

  Abstract:Ultrafast imaging simultaneously pursuing high temporal and spatial resolution is a key technique to study the dynamics in the microscopic world. However, the broadband spectra of ultra-short pulses bring a major challenge to traditional coherent diffraction imaging (CDI), as they result in an indistinct diffraction pattern, thereby complicating image reconstruction. To address this, we introduce, to our knowledge, a new ultra-broadband coherent imaging method, and empirically demonstrate its efficacy in facilitating high-resolution and rapid image reconstruction of achromatic objects. The existing full bandwidth limitation for snapshot CDI is enhanced to ∼60% experimentally, restricted solely by our laser bandwidth. Simulations indicate the applicability of our method for CDI operations with a bandwidth as high as ∼140%, potentially supporting ultrafast imaging with temporal resolution into ∼50-attosecond scale. Even deployed with a comb-like harmonic spectrum encompassing multiple octaves, our method remains effective. Furthermore, we establish the capability of our approach in reconstructing a super-broadband spectrum for CDI applications with high fidelity. Given these advancements, we anticipate that our method will contribute significantly to attosecond imaging, thereby advancing cutting-edge applications in material science, quantum physics, and biological research. © 2024 Chinese Laser Press.

  Affiliations:(1) Center for Attosecond Science and Technology (CAST), 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

  Publication Year:2024

  Volume:12

  Issue:9

  Start Page:2068-2077

  DOI Link:10.1364/PRJ.532957

  数据库ID（收录号）:20243717016353
• Record 216 of
  
  Title:Modeling of compliant-based support for large aperture rotary prisms with horizontal-axis
  
  Author Full Names:Tao, L.V.(1,2); Wansha, W.E.N.(1,2); Ruan, Ping(1,2); Hao, And W.E.I.(1,2)

  Source Title:Optics Express

  Language:English

  Document Type:Journal article (JA)

  Abstract:In the Thirty-Meter-Telescope (TMT), a pair of wedge prisms with diameters of approximately 1500 mm are proposed to mitigate atmospheric dispersion across different zenith angles. This is achieved through controlled linear and rotary movements of the prisms. However, providing stable support for such large aperture prisms, with variable cross-sections and capable of rotating 360° around a horizontal optical axis, poses a significant challenge. This paper introduces a compliant-based support method tailored for TMT’s large aperture prisms. The methodology involves a mechanical analysis of the wedge prism with push-pull forces combination, followed by the development of the support principle based on degrees of freedom and constraints analysis. Subsequently, numerical modeling is conducted using compliant elements as the fundamental units. Furthermore, an integrated optomechanical analysis is performed to evaluate the performance of the support. The findings demonstrate that employing this support method results in superior optical surface accuracy under the coupled conditions of gravity and temperature, particularly for prisms with large apertures, variable cross-sections, and rotational capabilities. © 2024 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.

  Affiliations:(1) Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, No. 17 Xinxi Road, Xi’an; 710119, China; (2) Key Laboratory of Space Precision Measurement Technology, Chinese Academy of Sciences, No. 17 Xinxi Road, Xi’an; 710119, China

  Publication Year:2024

  Volume:32

  Issue:15

  Start Page:26396-26413

  DOI Link:10.1364/OE.530553

  数据库ID（收录号）:20242916730905