2025

• Record 37 of
  
  Title:Comparative analysis of optical gating time characterization methods for ultrafast gated image intensifiers with sub-nanosecond temporal resolution
  
  Author Full Names:Yang, Yang; Gou, Yongsheng; Feng, Penghui; Xu, Yan; Wang, Bo; Liu, Baiyu; Tian, Jinshou; Wang, Xu; Liu, Hengbo

  Source Title:NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT

  Language:English

  Document Type:Article

  Keywords Plus:SYSTEM

  Abstract:Ultrafast gated image intensifiers are crucial for capturing high-resolution images with sub-nanosecond temporal resolution. This study compares two methods for characterizing optical gating time in these intensifiers: Method I, involving a laser pulse walkthrough, and Method II, utilizing a fiber optic delay array. Both methods were applied to the same intensifier, with results analyzed for consistency and discrepancies. The findings indicate that both methods yield consistent optical gating times within their standard deviations range, though Method II exhibited greater dispersion at the photocathode edges due to spatial non-uniformity. The study further reveals that while the optical gating time distribution across the photocathode is uniformly consistent, a constant delay exists between different regions. To enhance measurement precision it is recommended to subdivide the photocathode for individual calibration of gating time and delay. These insights are pivotal for improving the precision and reliability of optical gating time measurements in applications requiring sub-nanosecond or even picosecond temporal resolution.

  Addresses:[Yang, Yang; Gou, Yongsheng; Feng, Penghui; Xu, Yan; Wang, Bo; Liu, Baiyu; Tian, Jinshou; Wang, Xu; Liu, Hengbo] Chinese Acad Sci, Xian Inst Opt & Precis Mech, Key Lab Ultrafast Photoelect Diagnost Technol, Xian 710119, Peoples R China; [Yang, Yang; Tian, Jinshou] Shanxi Univ, Collaborat Innovat Ctr Extreme Opt, Taiyuan 030006, Peoples R China; [Feng, Penghui] Xi An Jiao Tong Univ, Sch Elect Sci & Engn, Xian 710049, Peoples R China

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

  Publication Year:2025

  Volume:1070

  Article Number:170023

  DOI Link:http://dx.doi.org/10.1016/j.nima.2024.170023

  数据库ID（收录号）:WOS:001348186300001
• Record 38 of
  
  Title:MTNet: Multimodal transformer network for mild depression detection through fusion of EEG and eye tracking
  
  Author Full Names:Zhu, Feiyu; Zhang, Jing; Dang, Ruochen; Hu, Bingliang; Wang, Quan

  Source Title:BIOMEDICAL SIGNAL PROCESSING AND CONTROL

  Language:English

  Document Type:Article

  Abstract:With the increasing multimodality of biomedical data, data fusion has been widely utilized in depression research, in response to the significant rise in the incidence of depression. In our study, we propose a novel multimodal transformer network (MTNet) that integrates eye tracking with EEG data for depression detection. The MTNet effectively captures both local and global spatio-temporal characteristics of multimodal data, utilizing the global receptive field of the transformer model to capture the long-term dependencies within the data. Results confirmed that our proposed MTNet surpasses the feature-based fusion and other baseline models, with a classification accuracy of 91.79 %, which highlights the potential value of multimodal fusion with biological signals in depression detection. Moreover, we specifically concentrate on the fusion stage in multimodal fusion, carrying out analysis for early, intermediate, and late fusion respectively. Our study demonstrates that intermediate fusion yields superior performance in processing EEG and eye tracking data, effectively adapting to the heterogeneity of multimodal data.

  Addresses:[Zhu, Feiyu; Dang, Ruochen; Wang, Quan] Chinese Acad Sci, Xian Inst Opt & Precis Mech XIOPM, Key Lab Spectral Imaging Technol, Xian 710119, Peoples R China; [Zhu, Feiyu; Dang, Ruochen] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Zhu, Feiyu; Dang, Ruochen; Hu, Bingliang; Wang, Quan] Chinese Acad Sci, Xian Inst Opt & Precis Mech XIOPM, Key Lab Biomed Spect Xian, Xian 710119, Peoples R China; [Zhang, Jing] Sci & Technol Complex Aviat Syst Simulat Lab, Beijing 100076, 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; Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CAS

  Publication Year:2025

  Volume:100

  Article Number:106996

  DOI Link:http://dx.doi.org/10.1016/j.bspc.2024.106996

  数据库ID（收录号）:WOS:001368706900001
• Record 39 of
  
  Title:Numerical prediction of drag force on spherical elements inside high-speed ball bearing with under-race lubrication
  
  Author Full Names:Gao, Wenjun; Li, Yuanhao; Li, Can; Xu, Yang; Liu, Zhenxia

  Source Title:MECHANICAL SYSTEMS AND SIGNAL PROCESSING

  Language:English

  Document Type:Article

  Keywords Plus:FLOW; COEFFICIENT; TORQUE

  Abstract:In high-speed ball bearings, the revolution of spherical elements is significantly influenced by drag force of lubricant fluid, impacting the bearing's dynamic and thermal performance. To investigate drag force in under-race lubrication ball bearings, a numerical study was conducted after the experimental verification. A multi-sphere flow model with a sandwich plate was tested, which indicates a strong agreement between numerical calculations and experimental data, with an error margin below 10 %. In the numerical simulation, pressure distribution and shear stress on the ball was studied, considering variables such as bearing rotational speed, oil flow rate, oil density, and oil viscosity. Results reveal low pressure at the upper hemisphere's center and high pressure on both sides. Shear stress is concentrated in contact areas between the element and components like the inner ring, outer ring, and cage. Oil injection from the inner ring significantly alters the pressure and shear stress distribution in the lower hemisphere. The direction of drag force is the same as the rolling element's revolution, acting as driving force for elements' revolution. Increasing bearing rotating speed, oil flow rate, oil viscosity, and oil density all contribute to higher drag forces on the ball. Based on the numerical simulations, a predictive formula for the ball's drag force was developed.

  Addresses:[Gao, Wenjun; Li, Yuanhao; Li, Can; Liu, Zhenxia] Northwestern Polytech Univ, Sch Power & Energy, Xian 710129, Peoples R China; [Gao, Wenjun; Liu, Zhenxia] Natl Key Lab Sci & Technol Adv Light Duty Gas Turb, Xian 710129, Peoples R China; [Xu, Yang] Chinese Acad Sci, Xian Inst Opt & Precis Mech, Xian 710000, Peoples R China

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

  Publication Year:2025

  Volume:224

  Article Number:112024

  DOI Link:http://dx.doi.org/10.1016/j.ymssp.2024.112024

  数据库ID（收录号）:WOS:001335123700001
• Record 40 of
  
  Title:Global calibration method for multi-view-based vibration measurement of large structures
  
  Author Full Names:Lv, Junhao; Yao, Dong; Guo, Yuan; Xie, Junwei; Xiao, Jinyou; Yang, Lu

  Source Title:MEASUREMENT

  Language:English

  Document Type:Article

  Abstract:A multi-view global calibration method is proposed to overcome the limitations of overlapping regions in multi-view structural vibration measurement. This method establishes a mapping relationship from image points to experimental model points at the outset of vibration measurement, enabling a one-time global calibration of multi-view vibration response data. Furthermore, an image point detection method based on shape-function matching is designed to improve global calibration accuracy. Experimental results demonstrate that the proposed method excels in point detection and global calibration. Finally, the feasibility of this method is validated through vibration experiments on large aircraft fuselage structures.

  Addresses:[Lv, Junhao; Xie, Junwei; Xiao, Jinyou; Yang, Lu] Northwestern Polytech Univ, Sch Astronaut, Xian 710072, Peoples R China; [Yao, Dong] Chinese Acad Sci, Xian Inst Opt & Precis Mech, Xian 710119, Peoples R China; [Guo, Yuan] Hiwing Mat Co Ltd, China Aerosp Sci & Ind Corp, Zhenjiang 212132, Jiangsu, Peoples R China; [Yang, Lu] Shaanxi FAST Gear Co Ltd, Xian 710119, Peoples R China

  Affiliations:Northwestern Polytechnical University; Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CAS; China Aerospace Science & Industry Corporation (CASIC)

  Publication Year:2025

  Volume:242

  Article Number:115809

  DOI Link:http://dx.doi.org/10.1016/j.measurement.2024.115809

  数据库ID（收录号）:WOS:001331128900001
• Record 41 of
  
  Title:Analysis of coded dual-repetition rate single-photon LIDAR
  
  Author Full Names:Zhao, Yixin; Tian, Yuan; Zhang, Xuan; Xie, Meilin; Hao, Wei; Su, Xiuqin

  Source Title:OPTICS COMMUNICATIONS

  Language:English

  Document Type:Article

  Abstract:Single-photon Light Detection and Ranging (Lidar) has been widely used for long-range ranging due to its singlephoton sensitivity and picosecond timing resolution. However, it is still a great challenge to range long-range targets with high accuracy in a short time regardless of whether target is static or dynamic. It is because that the existing long-range single-photon ranging techniques both have non-negligible drawbacks: Coded Signal Ranging (CSSR) with long computation time and Multi-Repetition Rate Ranging (MRRSR) technology with low accuracy. Therefore, the coded multi-repetition rate single-photon ranging (CMSPR) method is proposed to achieve high-accuracy ranging with a short computation time. And coded dual-repetition rate single-photon ranging (CDSPR) system with neighboring coding lengths is proposed to simplify the solution process, which can directly have analytical solutions. Besides, the data centralization method (DCM) based on the coding technique is proposed to further enhance the performance of CDSPR, which is a data pre-processing method based on the characteristics of CDSPR. Results show that CDSPR with DCM can provide a higher ranging error with less computation time.

  Addresses:[Zhao, Yixin; Tian, Yuan; Zhang, Xuan; Xie, Meilin; Hao, Wei; Su, Xiuqin] Chinese Acad Sci, Xian Inst Opt & Precis Mech, Key Lab Space Precis Measurement Technol, Xian 710119, Peoples R China; [Zhao, Yixin; Tian, Yuan; Zhang, Xuan; Xie, Meilin; Hao, Wei; Su, Xiuqin] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Zhao, Yixin; Tian, Yuan; Zhang, Xuan; Xie, Meilin; Hao, Wei; Su, Xiuqin] Pilot Natl Lab Marine Sci & Technol, Qingdao 266200, 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; Laoshan Laboratory

  Publication Year:2025

  Volume:574

  Article Number:131148

  DOI Link:http://dx.doi.org/10.1016/j.optcom.2024.131148

  数据库ID（收录号）:WOS:001327131700001
• Record 42 of
  
  Title:A mathematical model for ultrafast laser processing of the slight curvature surface
  
  Author Full Names:Wang, Jing; Hou, Yaohua; Zhang, Jingzhou; Zhao, Hualong

  Source Title:OPTICS AND LASER TECHNOLOGY

  Language:English

  Document Type:Article

  Keywords Plus:HEAT ACCUMULATION; MULTIPULSE ABLATION; FEMTOSECOND; SIMULATION; IRRADIATION; PICOSECOND; MORPHOLOGY; DIAMOND; SHAPE; FILM

  Abstract:The precise control of the amount of material removal in the ultrafast laser ablation process is hindered by a number of factors, rendering it unable to meet the demand for accurate processing of complex surfaces. It is essential to employ an effective simulation method to predict the outcomes of ablation processing, thereby facilitating subsequent optimisation of parameters and precision process research. In this paper, a pulse-by-pulse mathematical model is presented for simulating the ultrafast laser ablation process for general materials. The mathematical model of the focused Gaussian beam considers the influences of key parameters, including the propagation direction of the beam, the position of the focal point, and the laser fluence, among others. The evolution process of etching materials was analysed, and the material ablation rate under different beam states was calculated. The actual processing was then simulated pulse by pulse using the grid division method. The model is straightforward and accessible, with parameters determined through a limited number of calibration experiments. The simulation accuracy for points, lines, and planes is approximately 0.9, with a mean simulation time of 1.3 s for a single pulse. The ablation model is well-suited for simulating complex curved surfaces, offering a valuable tool for precise ultra-fast laser machining.

  Addresses:[Wang, Jing; Hou, Yaohua; Zhang, Jingzhou; Zhao, Hualong] Chinese Acad Sci, Xian Inst Opt & Precis Mech, State Key Lab Transient Opt & Photon, Xian 710119, Peoples R China

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

  Publication Year:2025

  Volume:181

  Article Number:111786

  DOI Link:http://dx.doi.org/10.1016/j.optlastec.2024.111786

  数据库ID（收录号）:WOS:001321918900001
• Record 43 of
  
  Title:Polarization-enhanced contrast imaging for pupil detection
  
  Author Full Names:Huo, Yongsheng; Guan, Jinge; Dang, Ruochen; Dang, Qi; Zhu, Chenyifei; Wang, Quan

  Source Title:OPTICS AND LASERS IN ENGINEERING

  Language:English

  Document Type:Article

  Keywords Plus:VISIBLE WAVELENGTH; IRIS SEGMENTATION; LOCALIZATION; MATRIX

  Abstract:In pupil detection within the visible light spectrum, intensity information serves as a carrier for capturing the reflective characteristics of images. When the reflectance of the pupil and its adjacent iris is similar, effectively distinguishing between them becomes challenging. Polarization provides additional information sensitive to the physical and chemical properties of objects, aiding in overcoming this problem. In the polarimetric pupil detection method, the transmission process of polarized light in the human eye model is theoretically analyzed. Arbitrary orthogonal polarization channels are utilized instead of intensity to describe the collected image, facilitating the extraction of polarization information corresponding to each channel. Experimental validation of the proposed method was conducted using active polarization illumination imaging experiments. The experimental results verify that the polarimetric pupil detection method could not only suppress the scatter noise but also be capable of obtaining a combination of intensity and polarization information. Moreover, exploiting the distinctions in depolarization characteristics among biological tissues can substantially improve their contrast. The research findings presented in this article provide insights into enhancing imaging methods for existing pupil detection schemes.

  Addresses:[Huo, Yongsheng; Dang, Ruochen; Dang, Qi; Wang, Quan] Chinese Acad Sci, Xian Inst Opt & Precis Mech, Key Lab Spectral Imaging Technol, Xian 710119, Peoples R China; [Huo, Yongsheng; Dang, Qi] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Guan, Jinge; Zhu, Chenyifei] North Univ China, Sch Informat & Commun Engn, Taiyuan 030051, 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; North University of China

  Publication Year:2025

  Volume:184

  Article Number:108595

  DOI Link:http://dx.doi.org/10.1016/j.optlaseng.2024.108595

  数据库ID（收录号）:WOS:001317987300001
• Record 44 of
  
  Title:An on-machine measurement and calibration method for incident laser error in dual-swing laser heads
  
  Author Full Names:Jiang, Hao; Ma, Caiwen; Li, Ming; Li, Chenchen

  Source Title:OPTICS AND LASERS IN ENGINEERING

  Language:English

  Document Type:Article

  Keywords Plus:5-AXIS MACHINE; ROTARY; AXES

  Abstract:The dual-swing laser head is essential for five-axis laser machining, yet its precision is greatly affected by the incident laser beam. Any positional or angular deviation in the laser can cause the focus spot position of the head to change continuously during rotation, thereby severely compromise the manufacturing performance of the head. However, the current calibration methods for the incident beam of dual-swing laser heads have issues with low accuracy and insufficient engineering applicability. This paper proposes an on-machine measurement and calibration method for incident laser error in dual-swing laser heads. An error model for the incident beam with a dual-swing laser head was established, from which the law of spot position changes caused by incident beam errors during the head's rotation was derived. Subsequently, following this law, a precision calibration method for the laser head's incident beam error was proposed, based on the theory of optical image height. Afterwards, an on-machine error measurement system was established on the dual-swing laser head, and the calibration method was verified through experiments. The results show that the use of this calibration method can improve the accuracy of the incident beam for dual-swing laser head to 0.071 mm, which is approximately 3-4 times better than traditional calibration methods, thereby significantly enhancing the manufacturing precision of the laser head.

  Addresses:[Jiang, Hao; Ma, Caiwen; Li, Ming; Li, Chenchen] Chinese Acad Sci, Xian Inst Opt & Precis Mech, State Key Lab Transient Opt & Photon, Xian 10068, Peoples R China; [Jiang, Hao] 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:2025

  Volume:184

  Article Number:108563

  DOI Link:http://dx.doi.org/10.1016/j.optlaseng.2024.108563

  数据库ID（收录号）:WOS:001315707400001
• Record 45 of
  
  Title:Characterization of ultrasonic vibration and polishing force in sapphire ultrasonic vibration-assisted flexible polishing: Insights from in-situ monitoring systems
  
  Author Full Names:Geng, Ying; Sun, Guoyan; Wang, Sheng; Zhao, Qingliang

  Source Title:ULTRASONICS

  Language:English

  Document Type:Article

  Keywords Plus:TOOL WEAR; MATERIAL REMOVAL; BEHAVIOR; MODEL; MECHANISM; DAMAGE; HARD

  Abstract:Sapphire ultrasonic vibration-assisted flexible polishing (UVAFP) is a promising technique for comprehensively improving the surface integrity of machined parts. The technique was performed on an ultra-precision machine tool with the in-situ monitoring systems in this paper, which aims to provide a new perspective for understanding the material removal mechanisms in the sapphire UVAFP process. A Taguchi L-9 (4(3)) orthogonal experiment was conducted to investigate the effects of feed distance, spindle speed, ultrasonic vibration (UV), and polishing time on the surface finish and material removal in the process. In addition, the effect of a polyurethane ball tool is not trivial. A single-factor experiment was conducted for exploring it. Based on a laser displacement measurement system and an acoustic emission sensor system, the characteristics of time-dependent ultrasonic amplitude and ultrasonic frequency for the sapphire UVAFP system were analyzed, with the effectiveness of UV demonstrated. Based on a three-component force measurement system, the characteristics of normal force and its relationship with process parameters and tool deformation were analyzed, with macro- and micro-level examined. In conclusion, this paper presents the characterization of UV and polishing force in the sapphire UVAFP process, providing novel insights into understanding the material removal mechanisms of sapphire and even more manufacturing problems.

  Addresses:[Geng, Ying; Wang, Sheng; Zhao, Qingliang] Harbin Inst Technol, Sch Mechatron Engn, Harbin 150001, Peoples R China; [Sun, Guoyan] Chinese Acad Sci, Xian Inst Opt & Precis Mech, Xian 710119, Peoples R China; [Sun, Guoyan] Natl Univ Def Technol, Coll Artificial Intelligence, Changsha 410003, Peoples R China

  Affiliations:Harbin Institute of Technology; Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CAS; National University of Defense Technology - China

  Publication Year:2025

  Volume:145

  Article Number:107431

  DOI Link:http://dx.doi.org/10.1016/j.ultras.2024.107431

  数据库ID（收录号）:WOS:001310843900001
• Record 46 of
  
  Title:Feature enhanced non-line-of-sight imaging using graph model in latent space
  
  Author Full Names:Xu, Weihao; Chen, Songmao; Wang, Dingjie; Tian, Yuyuan; Zhang, Ning; Hao, Wei; Su, Xiuqin

  Source Title:OPTICS AND LASER TECHNOLOGY

  Language:English

  Document Type:Article

  Keywords Plus:BACK-PROJECTION

  Abstract:Non-line-of-sight (NLoS) imaging reveals hidden scene from indirect diffusion signals. However, it is still challenging to balance noise suppression, detail preservation, and reconstruction efficiency. In this work, a robust framework which is centered on feature extractor and enhancement is proposed. In the framework, the feature extractor exploits the graph model in latent space for efficient noise suppression and detail preservation, the enhancement collaboratively learns the feature and data statistics by considering the extractor to define regularization. The reconstruction results on the publicly accessible datasets show that the proposed framework outperforms the state-of-art methods considering both quality and efficiency.

  Addresses:[Xu, Weihao; Chen, Songmao; Wang, Dingjie; Tian, Yuyuan; Hao, Wei; Su, Xiuqin] Chinese Acad Sci, Xian Inst Opt & Precis Mech, Key Lab Space Precis Measurement Technol, Xian 710119, Peoples R China; [Xu, Weihao; Wang, Dingjie; Tian, Yuyuan; Hao, Wei; Su, Xiuqin] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Chen, Songmao; Su, Xiuqin] Pilot Natl Lab Marine Sci & Technol, Qingdao 266237, Peoples R China; [Zhang, Ning] Chinese Acad Sci, Key Lab Spectral Imaging Technol, Xian Inst Opt & Precis Mech, Xian 710119, 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; Laoshan Laboratory; Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CAS

  Publication Year:2025

  Volume:181

  Article Number:111538

  DOI Link:http://dx.doi.org/10.1016/j.optlastec.2024.111538

  数据库ID（收录号）:WOS:001311832200001
• Record 47 of
  
  Title:Degradation-aware deep unfolding network with transformer prior for video compressive imaging
  
  Author Full Names:Yin, Jianfu; Wang, Nan; Hu, Binliang; Wang, Yao; Wang, Quan

  Source Title:SIGNAL PROCESSING

  Language:English

  Document Type:Article

  Abstract:In video snapshot compressive imaging (SCI) systems, video reconstruction methods are used to recover spatial- temporal-correlated video frame signals from a compressed measurement. While unfolding methods have demonstrated promising performance, they encounter two challenges: (1) They lack the ability to estimate degradation patterns and the degree of ill-posedness from video SCI, which hampers guiding and supervising the iterative learning process. (2) The prevailing reliance on 3D-CNNs in these methods limits their capacity to capture long-range dependencies. To address these concerns, this paper introduces the Degradation-Aware Deep Unfolding Network (DADUN). DADUN leverages estimated priors from compressed frames and the physical mask to guide and control each iteration. We also develop a novel Bidirectional Propagation Convolutional Recurrent Neural Network (BiP-CRNN) that simultaneously captures both intra-frame contents and inter-frame dependencies. By plugging BiP-CRNN into DADUN, we establish a novel end-to-end (E2E) and data-dependent deep unfolding method, DADUN with transformer prior (TP), for video sequence reconstruction. Experimental results on various video sequences show the effectiveness of our proposed approach, which is also robust to random masks and has wide generalization bounds.

  Addresses:[Yin, Jianfu; Hu, Binliang; Wang, Quan] Chinese Acad Sci, Xian Inst Opt & Precis Mech, Xian 710119, Peoples R China; [Yin, Jianfu] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Yin, Jianfu; Hu, Binliang; Wang, Quan] Key Lab Biomed Spect Xian, Xian 710119, Peoples R China; [Wang, Nan] Hainan Normal Univ, Sch Informat Sci & Technol, Haikou 571158, Peoples R China; [Wang, Yao] Xi An Jiao Tong Univ, Ctr Intelligent Decis Making & Machine Learning, Xian 7100499, 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; Hainan Normal University; Xi'an Jiaotong University

  Publication Year:2025

  Volume:227

  Article Number:109660

  DOI Link:http://dx.doi.org/10.1016/j.sigpro.2024.109660

  数据库ID（收录号）:WOS:001313717100001
• Record 48 of
  
  Title:Design and development of a stand-off Raman brassboard (SDU-RRS) for the spectroscopic study of planetary materials
  
  Author Full Names:Qi, Xiaobin; Liu, Ping; Qu, Hongkun; Liu, Changqing; Bao, Gang; Wang, Xiaoyu; Liu, Yiheng; Xin, Yanqing; Cao, Haijun; Chen, Jian; Xiao, Ayang; Zhao, Yiyi; Xue, Bin; Xu, Weiming; Shu, Rong; Ling, Zongcheng

  Source Title:SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY

  Language:English

  Document Type:Article

  Keywords Plus:BIDIRECTIONAL REFLECTANCE SPECTROSCOPY; SYSTEM; MARS; SPECTROMETER; EXPLORATION

  Abstract:Raman spectroscopy has emerged as a crucial mineral analysis technique in planetary surface exploration missions. Nonetheless, the inherently low Raman scattering efficiency of planetary silicate materials makes it challenging to extract enough Raman information. Theoretical and experimental studies of the remote Raman scattering properties of planetary materials are also urgent requirements for future lunar and planetary explorations. Here, Shandong University Remote Raman Spectrometer (SDU-RRS) was developed to demonstrate the feasibility of lunar remote Raman technology and conduct preliminary research on remote Raman scattering properties. SDU-RRS utilizes a pulsed 532 nm laser, a non-focal Cassegrain telescope, a volume phase holographic grating, an intensified charge-coupled device, and the time-gating technique to detect weak-signal silicate minerals. The spectral resolution obtained with atomic emission lamps was <4.91 cm(-1), and the wavelength accuracy was <1 cm(-1), across the spectral range of 241-2430 cm(-1). SDU-RRS can detect natural augite within a feldspar-olivine-augite matrix at a concentration of 20 % at similar to 1 m under ambient lighting conditions. A series of experiments were conducted to evaluate the influence of measurement conditions and physical matrix effects on acquired Raman signals, either qualitatively or quantitatively, on geological materials. The study indicates that the transmission of Raman-scattered light conforms to Lambert's cosine law, and a linear correlation exists between Raman intensity and laser power. The study also evaluated the impact of grain size, surface roughness, porosity, and shadow-hiding effects. Reducing grain size decreases Raman intensity and broadens Raman spectra. These characteristics are essential for achieving definitive mineralogical information from granular materials by remote Raman spectroscopy in lunar and planetary explorations.

  Addresses:[Qi, Xiaobin; Liu, Ping; Qu, Hongkun; Liu, Changqing; Bao, Gang; Wang, Xiaoyu; Liu, Yiheng; Xin, Yanqing; Cao, Haijun; Chen, Jian; Xiao, Ayang; Ling, Zongcheng] Shandong Univ, Inst Space Sci, Sch Space Sci & Phys, Shandong Key Lab Opt Astron & Solar Terr Environm, Weihai 264209, Shandong, Peoples R China; [Zhao, Yiyi; Xue, Bin] Chinese Acad Sci, Xian Inst Opt & Precis Mech, Xian 710119, Shanxi, Peoples R China; [Xu, Weiming; Shu, Rong] Chinese Acad Sci, Key Lab Space Act Optoelect Technol, Shanghai Inst Tech Phys, Shanghai 200083, Peoples R China; [Ling, Zongcheng] Chinese Acad Sci, CAS Ctr Excellence Comparat Planetol, Hefei 230026, Peoples R China

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

  Publication Year:2025

  Volume:325

  Article Number:125026

  DOI Link:http://dx.doi.org/10.1016/j.saa.2024.125026

  数据库ID（收录号）:WOS:001310200300001