第 1 条，共 77 条
标题: Spectroscopic properties and Judd-Ofelt analysis of Dy3+-doped and Dy3+, Tm3+-codped Ge-In-S chalcogenide glasses
作者: Guo, HT (Guo, Haitao); Xu, YT (Xu, Yantao); Chen, HY (Chen, Hongyan); Cui, XX (Cui, Xiaoxia); Qiao, ZB (Qiao, Zebang); Gu, SX (Gu, Shaoxuan); Hou, CQ (Hou, Chaoqi); Meng, W (Meng, Wei); Lu, CF (Lu, Chunfeng); Peng, B (Peng, Bo)
来源出版物: JOURNAL OF NON-CRYSTALLINE SOLIDS  卷: 377  特刊: SI  页: 95-99  DOI: 10.1016/j.jnoncrysol.2013.01.013  出版年: OCT 1 2013 
Web of Science 核心合集中的 "被引频次": 1
被引频次合计: 1
摘要: 0.2 wt.% Dy3+-doped and 0.2 wt.% Dy3+, 0.5 wt.% Tm3+-codoped (100-x)GeS2 center dot xIn(2)S(3) (x = 5,10,15,20,25) chalcogenide glasses were prepared. Their spectroscopic properties were analyzed based on absorption (ranges from 500 to 3000 nm) and emission (ranges from 1000 to 4700 nm) measurements. The Judd-Ofelt strength parameters Omega(t) (t = 2, 4, 6) and the spectroscopy parameters A(rad), beta and T-rad were calculated, and the sigma(emi) of the 1330, 2930 and 4320 nm fluorescences were estimated. These Dy3+-doped and Dy3+, Tm3+-codoped Ge-In-S chalcogenide glasses are valuable materials for using in 1.3 mu m fiber-amplifiers and 2-5 mu m mid-infrared laser devices. (C) 2013 Elsevier B.V. All rights reserved.
文献类型: Article; Proceedings Paper
会议名称: 18th International Symposium on Non-Oxide and New Optical Glasses
会议日期: JUL 01-05, 2012
会议地点: Saint Malo, FRANCE
作者关键词: Chalcogenide glass; Rare-earth ions; Spectroscopy; Mid-infrared; Judd-Ofelt
KeyWords Plus: CHALCOHALIDE GLASSES; OPTICAL NONLINEARITY; THERMAL-PROPERTIES; SYSTEM; 3RD-ORDER
Web of Science 类别: Materials Science, Ceramics; Materials Science, Multidisciplinary
研究方向: Materials Science
IDS 号: 229YW
ISSN: 0022-3093
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第 2 条，共 77 条
标题: Image Fusion Based on Non-negative Matrix Factorization and Infrared Feature Extraction
作者: Mou, J (Mou, Jiao); Gao, W (Gao, Wei); Song, ZX (Song, Zongxi)
编者: Yuan Z; Wang L; Xu W; Yu K
来源出版物: 2013 6TH INTERNATIONAL CONGRESS ON IMAGE AND SIGNAL PROCESSING (CISP), VOLS 1-3  页: 1046-1050  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: A new effective fusion method based on non-negative matrix factorization (NMF) and infrared target extraction is presented for infrared and visible images fusion. The two source images are taken as original data in NMF analysis, from which the feature base containing the global features of the source images can be extracted. The feature base image is replaced by the adjusted visible image, which is histogram matched with the raw feature base. As non-negative matrix factorization image fusion algorithm lacks details, we introduce a local gradient as an active measure, and combine weighting and selection methods to fuse the visible image with the feature base image. Then the target regions from infrared image are segmented through edge detection, region growing and morphological processing methods. The segmented target regions are fused with the background regions of the feature base image. Experiment indicates that the proposed method is simple in calculation. And it can retain texture details of visible image, highlight the thermal target of infrared image and enhance the readability of source images.
文献类型: Proceedings Paper
会议名称: 6th International Congress on Image and Signal Processing (CISP)
会议日期: DEC 16-18, 2013
会议地点: Hangzhou, PEOPLES R CHINA
作者关键词: non-negative matrix factorization; infrared features; feature base; image fusion
Web of Science 类别: Computer Science, Artificial Intelligence; Engineering, Electrical & Electronic
研究方向: Computer Science; Engineering
IDS 号: BB1GK
ISBN: 978-1-4799-2763-0
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第 3 条，共 77 条
标题: Diode-pumped Yb:YAG thin disk laser with a novel multi-pass pump and cooling arrangement
作者: Song, QG (Song, Qiongge); Cheng, GH (Cheng, Guanghua); Zhu, JF (Zhu, Jiangfeng)
编者: Zheng L; Skuroda S; Liu H; Du B; Wei J; Zhao Y
来源出版物: APPLIED MATERIALS AND TECHNOLOGIES FOR MODERN MANUFACTURING, PTS 1-4  丛书: Applied Mechanics and Materials  卷: 423-426  页: 2074-2077  DOI: 10.4028/www.scientific.net/AMM.423-426.2074  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: We demonstrate a Yb:YAG thin disk laser with multi-pass diode-pumped structure and direct water cooling device. In the pump system, four passes of the pump radiation are focused on the thin disk using a center-punched spherical lens. The thin disk serves as the window of a copper tank and is directly cooled with recycle water-contacted method. The thin disk laser has a low pump at the threshold of operation. We obtained 450 mW output power around 1030 nm in a simple F-P resonant cavity.
文献类型: Proceedings Paper
会议名称: 3rd International Conference on Applied Mechanics, Materials and Manufacturing (ICAMMM 2013)
会议日期: AUG 24-25, 2013
会议地点: Dalian, PEOPLES R CHINA
作者关键词: Thin disk laser; Yb:YAG; diode-pumping; direct water cooling
Web of Science 类别: Engineering, Manufacturing; Engineering, Mechanical; Materials Science, Multidisciplinary; Mechanics
研究方向: Engineering; Materials Science; Mechanics
IDS 号: BA9GU
ISSN: 1660-9336
ISBN: 978-3-03785-888-2
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第 4 条，共 77 条
标题: An 90 Degree Airborne Flex Camera System
作者: Zhang, J (Zhang Jian); Yan, AQ (Yan Aqi); Wang, F (Wang Feng); Fan, ZY (Fan Zheyan); Chen, WN (Chen WeiNing); Zhang, Z (Zhang Zhi); Wu, DS (Wu Dengshan)
书籍团体作者: IEEE
来源出版物: 2013 IEEE INTERNATIONAL CONFERENCE OF IEEE REGION 10 (TENCON)  丛书: TENCON IEEE Region 10 Conference Proceedings  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: It is necessary to obtain high-speed dynamic image at a certain position outside an aircraft cabin such that we can monitor the state of the aircraft and measure some parameters quantitatively. We have to flex optical axis for 90 degree at mounting position. To solve long distance optical path conveying, improve imaging quality, and realize clear image at centre and other areas, secondary image is adopted when we design optical system. With the purpose of adapting to vibration and high-speed wind load on the aircraft, we adopt anti-mechanics and anti-wind load design. Finally, we test and verify the design by simulation and experiment.
文献类型: Proceedings Paper
会议名称: IEEE International Conference of Region 10 (TENCON)
会议日期: OCT 22-25, 2013
会议地点: Xian, PEOPLES R CHINA
作者关键词: aviation optical measurement; 90 degree flex camera; secondary image; wind load design; anti-mechanics design
Web of Science 类别: Engineering, Electrical & Electronic
研究方向: Engineering
IDS 号: BA3VD
ISSN: 2159-3442
ISBN: 978-1-4799-2825-5; 978-1-4799-2827-9
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第 5 条，共 77 条
标题: The accuracy analysis of the intersection measurement on the moving ships
作者: Wang, M (Wang, Miao); Shan, QS (Shan, Qiu-sha); Liu, K (Liu, Kai)
编者: Ye S; Fei Y
来源出版物: SIXTH INTERNATIONAL SYMPOSIUM ON PRECISION MECHANICAL MEASUREMENTS  丛书: Proceedings of SPIE  卷: 8916  文献号: 891643  DOI: 10.1117/12.2035540  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Based on the principle of the intersection measurement, the mathematical model of measuring the position and dimension of the moving ships was established, and the formula of the metrical accuracy was deduced. The Matlab software was utilized to simulate and emulate the metrical accuracy, and analysed the primary errors of the system measurement accuracy; the measurement model is validated, combined with the examination. The result indicated that the method is feasible which utilized the measurement principle to measure the position and dimension of the moving ships, and establish the basical for further project application.
文献类型: Proceedings Paper
会议名称: 6th International Symposium on Precision Mechanical Measurements (ISPMM)
会议日期: AUG 08-12, 2013
会议地点: Guiyang, PEOPLES R CHINA
作者关键词: intersection measurement; moving ships; accuracy analysis; simulate and emulate; position measurement; dimension measurement; measurement model; metrical accuracy
Web of Science 类别: Engineering, Electrical & Electronic; Optics
研究方向: Engineering; Optics
IDS 号: BA1SO
ISSN: 0277-786X
ISBN: 978-0-8194-9792-5
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第 6 条，共 77 条
标题: Output Performance of Gain Guided and Index Antiguided Fiber Lasers Pumped by Different Methods
作者: Zhu, YG (Zhu, Yonggang); Duan, KL (Duan, Kailiang); Zhao, BY (Zhao, Baoying); Yang, HN (Yang, Hening); Zhang, ET (Zhang, Entao); Zhao, W (Zhao, Wei)
编者: Chen Q; Zhou M; Chai R
来源出版物: 2013 22ND WIRELESS AND OPTICAL COMMUNICATIONS CONFERENCE (WOCC 2013)  页: 486-490  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: The output performance of Yb3+ doped gain guided and index antiguided (GG-IAG) fiber lasers pumped by different methods are compared by numerically solving rate equations (REs) with additional leakage losses. Three pump models, including forward pump, backward pump and bidirectional pump are established combined with REs model. Calculation results show that the output powers and slope efficiencies of GG-IAG fiber from high to low under the same condition are obtained by bidirectional pump, backward pump and forward pump in sequence. The upper energy level particle population density N-2(z) and thermal distribution along the fiber generated by bidirectional pump are more uniform than that by other two pump methods. It benefits the lasing of GG-IAG fiber most.
文献类型: Proceedings Paper
会议名称: 22nd Wireless and Optical Communications Conference (WOCC)
会议日期: MAY 16-18, 2013
会议地点: Chongqing, PEOPLES R CHINA
会议主办方: Chongqing Univ Posts & Telecommunicat
作者关键词: gain guided; index antiguided; fiber lasers; pump methods
KeyWords Plus: SINGLE-MODE; SIDE-PUMP; CORE
Web of Science 类别: Computer Science, Hardware & Architecture; Optics; Telecommunications
研究方向: Computer Science; Optics; Telecommunications
IDS 号: BA1GS
ISBN: 978-1-4673-5697-8; 978-1-4673-5699-2
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第 7 条，共 77 条
标题: Numerical Analysis of Large Mode Area Segmented Cladding Fibers
作者: Shao, HM (Shao, Hongmin); Duan, KL (Duan, Kailiang); Zhu, YG (Zhu, Yonggang); Yang, HN (Yang, Hening)
编者: Chen Q; Zhou M; Chai R
来源出版物: 2013 22ND WIRELESS AND OPTICAL COMMUNICATIONS CONFERENCE (WOCC 2013)  页: 491-494  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: we analyze numerically the dependence of segmented cladding fibers (SCF) characters, including the effective V-number, the effective fundamental mode area and the permissible bending radius of fundamental mode, on the structure parameters of the fiber and the signal wavelength with the methods of radial effective index and transmission matrix. The results show that a single mode and large mode area fiber with an acceptable permissible bending radius can be obtained when we design SCF with optimized structure parameters. The effective fundamental area is as large as 1948.93 mu m(2) with proper fiber parameters. It will benefit the fabrication of the SCF for applications in high power fiber lasers.
文献类型: Proceedings Paper
会议名称: 22nd Wireless and Optical Communications Conference (WOCC)
会议日期: MAY 16-18, 2013
会议地点: Chongqing, PEOPLES R CHINA
会议主办方: Chongqing Univ Posts & Telecommunicat
作者关键词: high power lasers; SCF; the effective mode area
KeyWords Plus: PROFILE OPTICAL FIBERS; PHOTONIC CRYSTAL FIBER; EFFECTIVE-INDEX METHOD; AMPLIFICATION; LASER
Web of Science 类别: Computer Science, Hardware & Architecture; Optics; Telecommunications
研究方向: Computer Science; Optics; Telecommunications
IDS 号: BA1GS
ISBN: 978-1-4673-5697-8; 978-1-4673-5699-2
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第 8 条，共 77 条
标题: Image Jigsaw Puzzles with A Self-Correcting Solver
作者: Zheng, XT (Zheng, Xiangtao); Lu, XQ (Lu, Xiaoqiang); Yuan, Y (Yuan, Yuan)
编者: Zhang X; Zhou Z; Wang Q; Luo X
来源出版物: 2013 INTERNATIONAL CONFERENCE ON VIRTUAL REALITY AND VISUALIZATION (ICVRV 2013)  页: 112-118  DOI: 10.1109/ICVRV.2013.26  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Jigsaw puzzle is an intellectual game and serves as a platform for many scientific applications. Several computational methods have been proposed to deal with the jigsaw puzzle problem in recent years. However, there are still some drawbacks. First, these methods fail to consider the content consistency of the reconstructed images. Specially, the traditional measures only reflect similarity between adjoining pieces but neighboring pieces. Second, these methods cannot guarantee the overall reconstruction correctness, because the strategy of assembly merely tries to correct the measure of adjoining pieces at each step. To overcome these drawbacks, this paper proposes a new method which contributes the follows: 1) A new measure considers the transmission relationships of four neighboring pieces to make better use of content consistency. 2) A self-correcting mechanism avoids error accumulation of adjoining matrix and improves the overall accuracy of assembly, which is achieved through ordering the pairwise relations. Experimental results on 20 images demonstrate that the proposed method significantly improves the performance and outperforms the state-of-the-art methods.
文献类型: Proceedings Paper
会议名称: International Conference on Virtual Reality and Visualization (ICVRV)
会议日期: SEP 14-15, 2013
会议地点: Xian, PEOPLES R CHINA
作者关键词: Jigsaw puzzle; dissimilarity-based measure; assembly; self-correcting mechanism; minimal spanning tree
Web of Science 类别: Computer Science, Artificial Intelligence; Computer Science, Cybernetics; Engineering, Electrical & Electronic; Imaging Science & Photographic Technology
研究方向: Computer Science; Engineering; Imaging Science & Photographic Technology
IDS 号: BA0BL
ISBN: 978-0-7695-5150-0
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第 9 条，共 77 条
标题: Slow Feature Analysis for Multi-Camera Activity Understanding
作者: Zhang, L (Zhang, Lei); Lu, XQ (Lu, Xiaoqiang); Yuan, Y (Yuan, Yuan)
编者: Zhang X; Zhou Z; Wang Q; Luo X
来源出版物: 2013 INTERNATIONAL CONFERENCE ON VIRTUAL REALITY AND VISUALIZATION (ICVRV 2013)  页: 241-244  DOI: 10.1109/ICVRV.2013.46  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Multi-camera activity analysis is a key point in video surveillance of many wide-area scenes, such as airports, underground stations, shopping mall and road junctions. On the basis of previous work, this paper presents a new feature learning method based on Slow Feature Analysis (SFA) to understand activities observed across the network of cameras. The main contribution of this paper can be summarized as follows: (1) It is the first time that SFA-based learning method is introduced to multi-camera activity understanding; (2) It presents an evaluation to examine the effectiveness of SFA-based method to facilitate the learning of inter-camera activity pattern dependencies; and (3) It estimates the sensitivity of learning inter-camera time delayed dependency given different training size, which is a critical factor for accurate dependency learning and has not been largely studied by existing work before. Experiments are carried out on a dataset obtained in a trident roadway. The results demonstrate that the SFA-based method outperforms the sate of the art.
文献类型: Proceedings Paper
会议名称: International Conference on Virtual Reality and Visualization (ICVRV)
会议日期: SEP 14-15, 2013
会议地点: Xian, PEOPLES R CHINA
作者关键词: video surveillance; slow feature analysis; multi-camera activity analysis
Web of Science 类别: Computer Science, Artificial Intelligence; Computer Science, Cybernetics; Engineering, Electrical & Electronic; Imaging Science & Photographic Technology
研究方向: Computer Science; Engineering; Imaging Science & Photographic Technology
IDS 号: BA0BL
ISBN: 978-0-7695-5150-0
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第 10 条，共 77 条
标题: Design of chirped mirrors used for the dispersion compensation in femtosecond lasers
作者: Liao, CY (Liao Chunyan); Qin, JJ (Qin Junjun); Hu, ML (Hu Manli)
编者: Chu J; Wang C
来源出版物: EIGHTH INTERNATIONAL CONFERENCE ON THIN FILM PHYSICS AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 9068  文献号:   DOI: 10.1117/12.2053961  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Negative dispersion dielectric multilayer mirrors have contributed significantly to the enhancement of the performance, compactness and reliability of femtosecond lasers. There are two alternative approaches that are widely investigated for dispersion compensation: chirped mirrors and Gires-Tournois mirrors. Chirped mirrors can exhibit a broad smooth high-reflectance range if the layer thickness is superimposed a quasi-periodic modulation on a linear variation of the optical thickness of the layers. The performance of such chirped mirrors is calculated and the factors affecting the performance are discussed in detail. In such chirped mirrors, the performance is strongly affected by the expected bandwidth and modulation period of the optical thickness of the layers.
文献类型: Proceedings Paper
会议名称: 8th International Conference on Thin Film Physics and Applications (TFPA)
会议日期: SEP 20-23, 2013
会议地点: Shanghai, PEOPLES R CHINA
作者关键词: chirped mirror; optical film; dispersion compensation
KeyWords Plus: GIRES-TOURNOIS INTERFEROMETERS; DIELECTRIC MIRRORS
Web of Science 类别: Materials Science, Coatings & Films; Optics; Physics, Applied
研究方向: Materials Science; Optics; Physics
IDS 号: BJM62
ISSN: 0277-786X
ISBN: 978-0-8194-9997-4
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第 11 条，共 77 条
标题: A Novel Color Constancy Algorithm Based on Gray-Curve Regulation
作者: Guo, HN (Guo, Huinan); Zhou, ZF (Zhou, Zuofeng); Tang, Y (Tang, Yao); Cao, JZ (Cao, Jianzhong)
编者: Wang Y; Yi X
来源出版物: FIFTH INTERNATIONAL CONFERENCE ON DIGITAL IMAGE PROCESSING (ICDIP 2013)  丛书: Proceedings of SPIE  卷: 8878  文献号: 88784F  DOI: 10.1117/12.2030932  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Color constancy performs an important role in computer vision and digital color image processing. The traditional color regulation algorithms which are based on the gray world assumption neglect the correlation between the three stimulus color components and the nonlinear effect between the different gray levels. In this paper, we propose a novel color constancy algorithm which is based on gray-curve regulation. The proposed algorithm first divides the luminance interval into several parts and then regulates the gray-curves of RGB three channels in each subinterval which can solve the correlation and nonlinear problems simultaneously. The experiment results show the effectiveness of the proposed algorithm.
文献类型: Proceedings Paper
会议名称: 5th International Conference on Digital Image Processing (ICDIP)
会议日期: APR 21-22, 2013
会议地点: Beijing, PEOPLES R CHINA
作者关键词: color constancy; gray-curve; color temperature; color channel
Web of Science 类别: Optics; Imaging Science & Photographic Technology
研究方向: Optics; Imaging Science & Photographic Technology
IDS 号: BJJ57
ISSN: 0277-786X
ISBN: 978-0-8194-9305-7
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第 12 条，共 77 条
标题: Algorithm of Semicircular Laser Spot Detection Based on Circle Fitting
作者: Wang, ZZ (Wang, Zhengzhou); Xu, RH (Xu, Ruihua); Hu, BL (Hu, Bingliang)
编者: Wang Y; Yi X
来源出版物: FIFTH INTERNATIONAL CONFERENCE ON DIGITAL IMAGE PROCESSING (ICDIP 2013)  丛书: Proceedings of SPIE  卷: 8878  文献号: 88782Z  DOI: 10.1117/12.2030791  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: In order to obtain the exact center of an asymmetrical and semicircular aperture laser spot, a method for laser spot detection method based on circle fitting was proposed in this paper, threshold of laser spot image was segmented by the method of gray morphology algorithm, rough edge of laser spot was detected in both vertical and horizontal direction, short arcs and isolated edge points were deleted by contour growing, the best circle contour was obtained by iterative fitting and the final standard round was fitted in the end. The experimental results show that the precision of the method is obviously better than the gravity model method being used in the traditional large laser automatic alignment system. The accuracy of the method to achieve asymmetrical and semicircular laser spot center meets the requirements of the system.
文献类型: Proceedings Paper
会议名称: 5th International Conference on Digital Image Processing (ICDIP)
会议日期: APR 21-22, 2013
会议地点: Beijing, PEOPLES R CHINA
作者关键词: Small laser spot; boundary growth; circle fitting; image processing
Web of Science 类别: Optics; Imaging Science & Photographic Technology
研究方向: Optics; Imaging Science & Photographic Technology
IDS 号: BJJ57
ISSN: 0277-786X
ISBN: 978-0-8194-9305-7
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第 13 条，共 77 条
标题: Adaptive Bad Pixel Correction Algorithm for IRFPA Based on PCNN
作者: Leng, HB (Leng, Hanbing); Zhou, ZF (Zhou, Zuofeng); Cao, JZ (Cao, Jianzhong); Yi, B (Yi, Bo); Yan, AQ (Yan, Aqi); Zhang, J (Zhang, Jian)
编者: Zhang X; Liu J
来源出版物: MIPPR 2013: MULTISPECTRAL IMAGE ACQUISITION, PROCESSING, AND ANALYSIS  丛书: Proceedings of SPIE  卷: 8917  文献号:   DOI: 10.1117/12.2032065  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Bad pixels and response non-uniformity are the primary obstacles when IRFPA is used in different thermal imaging systems. The bad pixels of IRFPA include fixed bad pixels and random bad pixels. The former is caused by material or manufacture defect and their positions are always fixed, the latter is caused by temperature drift and their positions are always changing. Traditional radiometric calibration-based bad pixel detection and compensation algorithm is only valid to the fixed bad pixels. Scene-based bad pixel correction algorithm is the effective way to eliminate these two kinds of bad pixels. Currently, the most used scene-based bad pixel correction algorithm is based on adaptive median filter (AMF). In this algorithm, bad pixels are regarded as image noise and then be replaced by filtered value. However, missed correction and false correction often happens when AMF is used to handle complex infrared scenes. To solve this problem, a new adaptive bad pixel correction algorithm based on pulse coupled neural networks (PCNN) is proposed. Potential bad pixels are detected by PCNN in the first step, then image sequences are used periodically to confirm the real bad pixels and exclude the false one, finally bad pixels are replaced by the filtered result. With the real infrared images obtained from a camera, the experiment results show the effectiveness of the proposed algorithm.
文献类型: Proceedings Paper
会议名称: 8th Symposium on Multispectral Image Processing and Pattern Recognition (MIPPR) - Multispectral Image Acquisition, Processing, and Analysis
会议日期: OCT 26-27, 2013
会议地点: Wuhan, PEOPLES R CHINA
作者关键词: IRFPA; adaptive bad pixel correction; adaptive median filter; PCNN
Web of Science 类别: Optics; Imaging Science & Photographic Technology
研究方向: Optics; Imaging Science & Photographic Technology
IDS 号: BIC66
ISSN: 0277-786X
ISBN: 978-0-8194-9802-1
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第 14 条，共 77 条
标题: The Applications of Laser Tracking and Ranging Technology in Space Rendezvous and Docking
作者: She, WJ (She Wenji); Gao, LM (Gao Limin); Zhou, L (Zhou Liang); Li, DW (Li Dawei); Wang, R (Wang Rong)
编者: Amzajerdian F; Aksnes A; Chen W; Gao C; Zheng Y; Wang C
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2013: LASER SENSING AND IMAGING AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8905  文献号: 89050S  DOI: 10.1117/12.2033065  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: With the development of space technology, more and more Rendezvous and Docking (RVD) mission require more precise measurement of relative position and attitude between tracking spacecraft and target spacecraft. In the procedure of docking between near spacecraft, the optical retroreflector on the target Spacecraft were tracked by the laser tracking and ranging device on the tracking spacecraft, the distance data were provided by laser ranging system, and the azimuth data were provided by tracking gimbal, Synthesized the distance data and azimuth data, the relative position information between two spacecraft were provided to the target spacecraft. Furthermore, through tracking more than three point on the target spacecraft, the complete information of relative position and attitude between two spacecraft were calculated rapidly by the measurement system, which were presented to the control system during the whole RVD operating stage. The laser tracking technology guaranteed continuous measurement and supplied accurate azimuth information, and the laser ranging technology ensured high accuracy of distance information. In addition, the untouched measure mode give no disturbance to the docking operation, moreover, the monochromaticity of laser make the tracking and ranging procedure avoiding to be disturbed by parasitic light of space, thus there will be a effective measurement accompanying the whole docking operating procedure and affording valid data to the control system of docking.
文献类型: Proceedings Paper
会议名称: 5th International Symposium on Photoelectronic Detection and Imaging - Laser Sensing and Imaging and Applications
会议日期: JUN 25-27, 2013
会议地点: Beijing, PEOPLES R CHINA
作者关键词: Rendezvous and Docking of spacecraft; Laser tracking and ranging; Measurement of relative position and attitude
Web of Science 类别: Optics; Physics, Applied
研究方向: Optics; Physics
IDS 号: BHT86
ISSN: 0277-786X
ISBN: 978-0-8194-9774-1
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第 15 条，共 77 条
标题: Simulation of laser beam propagation through the troposphere
作者: Wang, BF (Wang Bao-feng); Luo, XJ (Luo Xiu-juan); Zhang, Y (Zhang Yu); Zeng, ZH (Zeng Zhi-hong); Wang, F (Wang Feng)
编者: Amzajerdian F; Aksnes A; Chen W; Gao C; Zheng Y; Wang C
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2013: LASER SENSING AND IMAGING AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8905  文献号: 89050D  DOI: 10.1117/12.2032170  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Understanding and predicting laser beam propagation effects in the atmosphere is important for laser applications. Turbulence effects cause beam wander, beam broadening, intensity scintillations, which reducing the power in bucket and the tracking accuracy, etc. In this work, the phase screens are used to model atmosphere turbulence in the model of the laser propagation through troposphere. And according to the characteristics of the troposphere, a layered model is used. Laser propagation follows the Huygens-Fresnel principle between phase screens. Simulations with different grid point numbers were constructed, and numerical experiments were conducted. According to the simulated results including Strehl ratio, sharpness, and amplitude distribution, preceding phase screens have effect on the total energy of the receiving surface, but have little impact on amplitude distribution. And the phase screens, which are close to the receiving surface, have a significant impact on both amplitude distribution and the total receiving energy. The results suggests that in simulation one should increase grid point numbers as many as possible and needs to pay particular attention to parameters of the phase screens near the receiving surface in simulation.
文献类型: Proceedings Paper
会议名称: 5th International Symposium on Photoelectronic Detection and Imaging - Laser Sensing and Imaging and Applications
会议日期: JUN 25-27, 2013
会议地点: Beijing, PEOPLES R CHINA
作者关键词: laser; propagation; turbulence; model; phase screens; Strehl ratio
Web of Science 类别: Optics; Physics, Applied
研究方向: Optics; Physics
IDS 号: BHT86
ISSN: 0277-786X
ISBN: 978-0-8194-9774-1
________________________________________
第 16 条，共 77 条
标题: INDUCED CURRENT MEASUREMENT IN BRIDGEWIRE EED THROUGH INFRARED OPTICAL FIBER IMAGE BUNDLE
作者: Xin, LW (Xin, Liwei); Wang, T (Wang, Tao); Tian, JS (Tian, Jinshou); Yin, F (Yin, Fei); Hu, YN (Hu, Yanan); Song, ZY (Song, Zhenyu); Yang, J (Yang, Jin); Yin, JZ (Yin, Jingzhi)
编者: Amzajerdian F; Aksnes A; Chen W; Gao C; Zheng Y; Wang C
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2013: LASER SENSING AND IMAGING AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8905  文献号: 890518  DOI: 10.1117/12.2033704  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: While bridgewire electroexplosive device ( EED) works in electromagnetic environment, conventional methods can introduce electromagnetism interference. A new method of measuring the induced current in EED is proposed in this article. It bases on infrared imagingto detect the inducting current from long distance and non-contact. The infrared optical fiber image bundle coupling with infrared CCD detector is used to detect the infrared images. At first, the thermal field images are acquired by infrared CCD detector. Then the value of weak induced current of corresponding bridgewire is further determined according to the relations of gray scale values and temperature, temperature and current. The experiment results show that bridgewire current is accurately measured by this method. This method offers a new way to evaluate electromagnetic effect of EED.
文献类型: Proceedings Paper
会议名称: 5th International Symposium on Photoelectronic Detection and Imaging - Laser Sensing and Imaging and Applications
会议日期: JUN 25-27, 2013
会议地点: Beijing, PEOPLES R CHINA
作者关键词: infrared optical fiber image bundle; induced current; infrared CCD detector; thermal field; gray scale value; temperature of bridgewire
Web of Science 类别: Optics; Physics, Applied
研究方向: Optics; Physics
IDS 号: BHT86
ISSN: 0277-786X
ISBN: 978-0-8194-9774-1
________________________________________
第 17 条，共 77 条
标题: Optimized H.264 Motion Estimation Algorithm Based on UMHexagonS
作者: Chen, L (Chen, Liu); Cao, JZ (Cao, Jian-zhong); Tang, LN (Tang, Li-nao); Huang, JJ (Huang, Ji-jiang); Guo, HN (Guo, Hui-nan); Dong, XK (Dong, Xiao-kun)
书籍团体作者: IEEE
来源出版物: PROCEEDINGS OF THE 2013 FOURTH INTERNATIONAL CONFERENCE ON INTELLIGENT CONTROL AND INFORMATION PROCESSING (ICICIP)  页: 177-181  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: H.264 has adoptedUMHexagonS algorithm as fast motion estimation algorithm for integer pixel formally, but this algorithm has some shortages such as searchpointsare lots, quantity of operation is kind of big, costs much time, and so on. These need to be solved as soon as possible. This paper introduces and analyses UMHexagonS algorithm. In order to solve these problems, this paper brings forwardclassification strategy for search algorithm according to statistical properties of the motion vector prediction value, and improvesthe template basedon original algorithm according to the characteristic of center bias of motion vector. The results of experimentsshow that the improved algorithm in this paper reduces the time of motion estimation by 15%similar to 27%. At the meantime, it can ensure PSNR and rate basically unchanged.
文献类型: Proceedings Paper
会议名称: 4th International Conference on Intelligent Control and Information Processing (ICICIP)
会议日期: JUN 09-11, 2013
会议地点: Beijing, PEOPLES R CHINA
作者关键词: video compression; UMHexagonS; motion estimation; classification strategy; center bias
KeyWords Plus: SEARCH ALGORITHM
Web of Science 类别: Automation & Control Systems; Computer Science, Artificial Intelligence; Engineering, Electrical & Electronic
研究方向: Automation & Control Systems; Computer Science; Engineering
IDS 号: BHQ49
ISBN: 978-1-4673-6249-8; 978-1-4673-6248-1
________________________________________
第 18 条，共 77 条
标题: Object Tracking Based on Integrating the Genetic Algorithm with Complex Method
作者: Dong, XK (Dong, Xiaokun); Cao, JZ (Cao, Jianzhong); Yang, HT (Yang, Hongtao); Yu, Z (Yu, Zhi); Guo, HN (Guo, Huinan); Liu, C (Liu, Chen)
书籍团体作者: IEEE
来源出版物: PROCEEDINGS OF THE 2013 FOURTH INTERNATIONAL CONFERENCE ON INTELLIGENT CONTROL AND INFORMATION PROCESSING (ICICIP)  页: 205-209  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Traditional Genetic algorithm in target tracking process, is quite effective in the global scope to search target position. However, once the background color and light intensity change. To monitor the state of the target depth movement is often difficult to locate the target accurately. However, complex method can make up for the lack of Genetic algorithms. In view of those, this paper integrates Complex method with traditional Genetic algorithms, uses the center coordinates of the candidate target and scaling coefficient to adjust the focus size as a parameter encoding, and takes the similarity between the target area and the target template as a fitness function, then searches the object in the overall and local scope in turn. The experiments show that the fusion algorithm can achieve accurate tracking of the position and the size of the target.
文献类型: Proceedings Paper
会议名称: 4th International Conference on Intelligent Control and Information Processing (ICICIP)
会议日期: JUN 09-11, 2013
会议地点: Beijing, PEOPLES R CHINA
作者关键词: Edge Orientation Histogram; Template matchingGenetic algorithms; Complex method
KeyWords Plus: FILTER
Web of Science 类别: Automation & Control Systems; Computer Science, Artificial Intelligence; Engineering, Electrical & Electronic
研究方向: Automation & Control Systems; Computer Science; Engineering
IDS 号: BHQ49
ISBN: 978-1-4673-6249-8; 978-1-4673-6248-1
________________________________________
第 19 条，共 77 条
标题: Implementation and Performance of Image Filtering on GPU
作者: Chen, X (Chen, Xi); Qiu, YH (Qiu, Yuehong); Yi, HW (Yi, Hongwei)
书籍团体作者: IEEE
来源出版物: PROCEEDINGS OF THE 2013 FOURTH INTERNATIONAL CONFERENCE ON INTELLIGENT CONTROL AND INFORMATION PROCESSING (ICICIP)  页: 514-517  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Image filtering is one of the most important parts in the image-processing. It takes much more time to performance the convolution in image filtering on CPU since the computation demanding of image filtering is massive. Contrast to CPU, GPU may be a good way to accelerate the image filtering. CUDA(Compute Unified Device Architecture) is a parallel computing architecture developed by NVIDIA. CUDA is highly suited for general purpose programming on GPU which is a programming interface to use the parallel architecture for general purpose computing. This interface is a set of library functions which can be coded as an extension of C language. In this paper, the filtering was implemented in the frequency domain instead of the spatial domain since the filtering in the frequency domain is faster than convolution in the spatial domain if we have filters with many coefficients and filtering in 2D. Compared with the traditional method of image filtering which was performed on CPU, the implementation of image filtering on GPU has a speedup of approximately 10 times. GPU has great potential as high-performance co-processor.
文献类型: Proceedings Paper
会议名称: 4th International Conference on Intelligent Control and Information Processing (ICICIP)
会议日期: JUN 09-11, 2013
会议地点: Beijing, PEOPLES R CHINA
Web of Science 类别: Automation & Control Systems; Computer Science, Artificial Intelligence; Engineering, Electrical & Electronic
研究方向: Automation & Control Systems; Computer Science; Engineering
IDS 号: BHQ49
ISBN: 978-1-4673-6249-8; 978-1-4673-6248-1
________________________________________
第 20 条，共 77 条
标题: The Generating Mechanism of strips and Destriping Algorithm of HJ-1A Hyperspectral Image
作者: Gao, XH (Gao Xiao-hui); Xu, GH (Xu Guang-hui); Yu, T (Yu Tao); Wei, RY (Wei Ru-yi)
编者: Zhang L; Yang J
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2013: IMAGING SPECTROMETER TECHNOLOGIES AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8910  文献号:   DOI: 10.1117/12.2034763  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Hyperspectral remote sensing images are affected by different types of noise. In addition to typical random noise, nonperiodic partially deterministic disturbance patterns appear in the data. The strips usually found in images acquired by push-broom sensors, which are characterized by a high degree of spatial and spectral coherence. Many strips-reduction approaches such as histogram matching and moment matching have been developed. These methods assume that all sensor elements observe similar subscenes in a given image and adjust the distributions of values acquired by each sensor to some reference distribution by means of a histogram or moment matching, but this assumption usually is failure in many scenes which contain diverse materials. The formation of strips has close connection with the image formation process of push-broom imaging spectrometers. Many causes such as the uniformity of the pixels, the push-broom mode and the asymmetric width of thin slit at the entrance of imaging spectrometers can induce the strips in the images. Comparing with the dispersive spectrometers, interferometer spectrometers acquire the interference data, obtaining the spectrum by using the Fast Fourier Transformation (FFT). By analyzing the generating mechanism of strips in push-broom interferometer imaging spectrometers, we proposed an approach that corrects the strips using relative calibration factor directly computed from the acquired image. Once the relative calibration factor is determined, all the images acquired by the same imaging spectrometers can be corrected. So the methodology is an efficient one to reduce the strips. A formula is set up to describe the connection between gray values of pixels in images and relative calibration factor. The developed methodology is tested on data acquired by HJ-1A Hyperspectral Imaging Spectrometers, which is an interferometer spectrometer put into operation in 2008. The shortwave bands of HJ-1A HSI have severe strips. Results show excellent rejection of the noise with respect to the original HJ-1A HSI images, improving the removal in those scenes with diverse materials as well as being high efficient.
文献类型: Proceedings Paper
会议名称: 5th International Symposium on Photoelectronic Detection and Imaging (ISPDI) - Imaging Spectrometer Technologies and Applications
会议日期: JUN 25-27, 2013
会议地点: Beijing, PEOPLES R CHINA
作者关键词: Hyperspectral Remote Sensing; Destriping; Spectral Imaging; Spatial Modulated; Push-broom
Web of Science 类别: Optics; Imaging Science & Photographic Technology
研究方向: Optics; Imaging Science & Photographic Technology
IDS 号: BHI23
ISSN: 0277-786X
ISBN: 978-0-8194-9779-6
________________________________________
第 21 条，共 77 条
标题: Alignment off-axis optical system using Nodal Aberration Theory
作者: Jiang, B (Jiang Bo); Zhou, SZ (Zhou Si-zhong); Jiang, K (Jiang Kai); Fu, HY (Fu Huai-yang); Mei, C (Mei Chao)
编者: Zhang L; Yang J
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2013: IMAGING SPECTROMETER TECHNOLOGIES AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8910  文献号:   DOI: 10.1117/12.2032379  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: We present the Fringe Zernike coefficients of the parent system pupil can be converted into coefficients of off-axis system, it is show that the coefficients of the Fringe Zernike polynomials in the off-axis pupil only contain orders equal to or lower than the Fringe Zernike polynomials originally placed on the parent pupil, and for the 3rd aberration the pupil transformation matrix has been finding. Using nodal aberration, we get the misaligned matrix of rotational symmetry parent optical system. Then with the pupil transformation matrix, the misaligned matrix of off-axis two-mirror system was found, the amounts of the misalignments are calculated by the off-axis misaligned matrix.
文献类型: Proceedings Paper
会议名称: 5th International Symposium on Photoelectronic Detection and Imaging (ISPDI) - Imaging Spectrometer Technologies and Applications
会议日期: JUN 25-27, 2013
会议地点: Beijing, PEOPLES R CHINA
作者关键词: Nodal aberration theory; Misalignment; Off-axis system; Fringe Zernike polynomials
KeyWords Plus: ROTATIONAL SYMMETRY; TELESCOPES
Web of Science 类别: Optics; Imaging Science & Photographic Technology
研究方向: Optics; Imaging Science & Photographic Technology
IDS 号: BHI23
ISSN: 0277-786X
ISBN: 978-0-8194-9779-6
________________________________________
第 22 条，共 77 条
标题: Design of Camera and Spectrometer Dual-use System
作者: Qi, YH (Qi Yong-hong); Xue, B (Xue Bin); Zhao, YY (Zhao Yi-yi); Tao, JY (Tao Jin-you)
编者: Zhang L; Yang J
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2013: IMAGING SPECTROMETER TECHNOLOGIES AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8910  文献号:   DOI: 10.1117/12.2033622  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Imaging spectrometers based on prism-grating-prism (PGP) have advantage of direct vision, as a basis for the design of an optical system for a spectrometer and camera dual-use, the system can plug the light splitting element to switch between the spectrometer and camera. This paper has discussed the working principles and structure of the PGP and spectrometer, collimating and focusing lens design principles, then the design result has been presented. The spectral range of the system is 400-800nm, the pixel size of CCD used is 10um x 10um, 1010 x 1018 pixels, the object space numerical aperture is 0.1. In order to reduce the cost and eliminate aberration, collimating lens and focusing lens have symmetric structure, in order to improve the diffraction efficiency, PGP uses the volume phase holographic transmission grating. After optimization the design by ZEMAX software, the whole spectral range resolution is better than 1nm in average, the MTF at Nyquist frequency is greater than 0.7, the length of the whole system is 87mm.
文献类型: Proceedings Paper
会议名称: 5th International Symposium on Photoelectronic Detection and Imaging (ISPDI) - Imaging Spectrometer Technologies and Applications
会议日期: JUN 25-27, 2013
会议地点: Beijing, PEOPLES R CHINA
作者关键词: Imaging Spectrometer; Camera; Prism-Grating-Prism; Optical Design
Web of Science 类别: Optics; Imaging Science & Photographic Technology
研究方向: Optics; Imaging Science & Photographic Technology
IDS 号: BHI23
ISSN: 0277-786X
ISBN: 978-0-8194-9779-6
________________________________________
第 23 条，共 77 条
标题: Calibration and correction of the CCD spectral response nonuniformity for Fourier transform imaging spectrometer
作者: Shi, DL (Shi Dalian); Liu, XB (Liu Xuebin); Wang, S (Wang Shuang); Jing, JJ (Jing Juanjuan); Wen, DS (Wen Desheng); Bai, QL (Bai Qinglan)
编者: Zhang L; Yang J
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2013: IMAGING SPECTROMETER TECHNOLOGIES AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8910  文献号:   DOI: 10.1117/12.2034271  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Due to the manufacturing technique, some kinds of CCD, such as the back illuminated CCD, have the problem of spectral response nonuniformity. The near infrared light passing through the substrate and gates and is reflected back into the substrate for a second pass resulting in increased response. For the Fourier transform imaging spectrometer, it adds stripe pattern error to the interferogram and distorts the reconstructed spectrum. The nonuniform response is wavelength dependent due to changes in reflectivity of metal and the cavity formed by silicon and metal with transparent dielectric, so it adds difficulty to the correction of the error of the reconstructed spectrum.
In order to reduce the error of the reconstructed spectrum, in this paper, a calibration method and a correction method to correct the error caused by the CCD spectral response nonuniformity was developed, basing on analysis of the property of the CCD spectral response nonuniformity. Firstly, a calibrated monochromater was used to measure the CCD spectral response nonuniformity and the property and affect of the CCD spectral response nonuniformity were analyzed. Method to correct the error of the reconstructed spectrum caused by the stripe pattern error was developed. Secondly, to calibrate the CCD spectral response nonuniformity, the spectral response coefficient and the spatial response nonuniformity coefficient was measured and computed. Finally, we took data with a Fourier transform imaging spectrometer, and got the correction results of the reconstructed spectrums. The results showed that the distortion of recovered spectrum was evidently reduced and the effect of the calibration and correction method was proved.
文献类型: Proceedings Paper
会议名称: 5th International Symposium on Photoelectronic Detection and Imaging (ISPDI) - Imaging Spectrometer Technologies and Applications
会议日期: JUN 25-27, 2013
会议地点: Beijing, PEOPLES R CHINA
作者关键词: Fourier transform imaging spectrometer; spectral response nonuniformity; calibration; spectrum recovery; stripe pattern error
Web of Science 类别: Optics; Imaging Science & Photographic Technology
研究方向: Optics; Imaging Science & Photographic Technology
IDS 号: BHI23
ISSN: 0277-786X
ISBN: 978-0-8194-9779-6
________________________________________
第 24 条，共 77 条
标题: Effect of the Fringe Visibility on Spectrum SNR of Fourier Transform Imaging Spectrometer
作者: Wang, S (Wang, Shuang); Bin, XL (Bin Xangli); Jing, JJ (Jing, Juanjuan); Pi, HF (Pi, Haifeng)
编者: Zhang L; Yang J
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2013: IMAGING SPECTROMETER TECHNOLOGIES AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8910  文献号:   DOI: 10.1117/12.2032912  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: The principle of Fourier transform spectrometer is based on the relationship of Fourier-Transform between interferogram and spectrum. The spectral information of Fourier transform imaging spectrometer (FTIS) reconstructed from raw interferogram by data processing. So there are two kinds of signal-to-noise ratio (SNR) to evaluate instrument performance, one regarding interferogram and the other regarding reconstructed spectrum. Because the raw interferogram is intuitive, the interferogram SNR is studied usually. On the contrary, the spectrum SNR is studied less because of the complexity of the data processing from interferogram to spectrum. The research about the effect of the interference fringe visibility on the spectrum SNR is especially few. This paper present a research work on the relations between the interference fringe visibility and the spectrum SNR. Firstly, the reduction of fringe visibility caused by imaging lens defocus was analyzed. Secondly, the changes of the average spectrum signal and noise caused by the reduction of fringe visibility were calculated. For average spectrum signal, the math deductions are done base on Fourier transform theory. The average noise with different input signal optic-electrons number are simulated. the results show that the average spectrum signal is directly proportional to the fringe visibility, and the effect of fringe visibility on the noise related to signal can be ignorable. Finally, In order to demonstrate above results, the imaging experiment was done with white-light source, using LASIS (Large aperture static imaging spectrometer) based on Sagnac Interferometer. The average spectrum SNRs under different fringe visibility are calculated and analyzed. The experimental results show that: the average spectrum SNRs increase from 42.7 to 62.4. along with the fringe visibility increasing from 0.5051 to 0.687. the reconstructed spectrum SNR is directly proportional to the fringe visibility. As a result, the interferogram fringe visibility can be used to estimate the reconstructed spectrum SNR, and evaluate the performance of FTIS before data processing.
文献类型: Proceedings Paper
会议名称: 5th International Symposium on Photoelectronic Detection and Imaging (ISPDI) - Imaging Spectrometer Technologies and Applications
会议日期: JUN 25-27, 2013
会议地点: Beijing, PEOPLES R CHINA
作者关键词: Remote sensing; Spectrum SNR; Fourier transform imaging spectrometer; Fringe visibility
Web of Science 类别: Optics; Imaging Science & Photographic Technology
研究方向: Optics; Imaging Science & Photographic Technology
IDS 号: BHI23
ISSN: 0277-786X
ISBN: 978-0-8194-9779-6
________________________________________
第 25 条，共 77 条
标题: Resolution performance of the extra ultraviolet telescopes
作者: Fu, HY (Fu Huai-yang); Zhou, SZ (Zhou Si-zhong); Jiang, K (Jiang Kai); Mei, C (Mei Chao)
编者: Ohta J; Wu N; Li B
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2013: IMAGING SENSORS AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8908  DOI: 10.1117/12.2032376  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: The Extreme Ultraviolet Telescopes (EUT) Operates at wavelengths between 100-1000 angstrom. As an important parameter of the telescope system, before the launch, angular resolution is necessary to be calibrated for testing the imaging performance of EUT. However, the difficulty and expense of fabricating optical testing systems capable of imaging the characteristic EUV wavelengths, has precluded in working wavelength resolution testing. This article taken a Ritchey-Chretien normal incidence optical system as sample and resolution tests were carried out at visible wavelength. Based on this measurement, the angular resolution error budget at visible wavelength was calculated. At working wavelength, we added the squares of the pointing jitter error, the resolution focusing error and the scattering error, to the theoretical Rayleigh diffraction limit at the wavelength of operation, and then take the square root of this sum, an upper limit estimate of telescope's resolution was obtained about 0.4705 arcsec. This result proved that the EUT worked at diffraction-limited level and the resolution performance has met the demand of design.
文献类型: Proceedings Paper
会议名称: 5th International Symposium on Photoelectronic Detection and Imaging (ISPDI) - Imaging Sensors and Applications
会议日期: JUN 25-27, 2013
会议地点: Beijing, PEOPLES R CHINA
作者关键词: Error budget; Resolution estimate; Extreme Ultraviolet Telescope (EUT)
Web of Science 类别: Optics; Imaging Science & Photographic Technology
研究方向: Optics; Imaging Science & Photographic Technology
IDS 号: BHI20
ISSN: 0277-786X
ISBN: 978-0-8194-9777-2
________________________________________
第 26 条，共 77 条
标题: The Realization of Network Video Monitoring System
作者: Hou, ZW (Hou Zhuo-wei); Qiu, YH (Qiu Yue-hong)
编者: Ohta J; Wu N; Li B
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2013: IMAGING SENSORS AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8908  DOI: 10.1117/12.2031629  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: The paper presents a network video monitoring system based on field programmable gate array to implement the real time acquisition and transmission of video signals. The system includes image acquisition module, central control module and Ethernet transmission module. According to request, Cyclone FPGA is taken as the control center in the system, using Quartus II and Nios II IDE as development tool to build the hardware development platform. A kind of embedded hardware system is built based on SOPC technic, in which the Nios II soft-core and other controllers are combined by configuration. Meanwhile, the mu Clinux is used as embedded operating system to make the process of acquisition and transmission of the data picture on the Internet more reliable. In order to fulfill the task of MAC and PHY, the fast Ethernet controller should be connected to the SOPC. TCP/IP protocol is used to implement data transmission. Based on TCP/IP protocol, the Web Servers should be embedded to implement the protocol of HTTP, TCP and UDP. Through the research of the thesis, with programmable logic device being the core and network being the transmission media, the design scheme of the video monitoring system is presented. The hardware's design is mainly done in the thesis. The principal and function of the system is deeply explained, so it can be the important technology and specific method.
文献类型: Proceedings Paper
会议名称: 5th International Symposium on Photoelectronic Detection and Imaging (ISPDI) - Imaging Sensors and Applications
会议日期: JUN 25-27, 2013
会议地点: Beijing, PEOPLES R CHINA
作者关键词: FPGA; Nios II core; Network video monitoring; SOPC; Ethernet
Web of Science 类别: Optics; Imaging Science & Photographic Technology
研究方向: Optics; Imaging Science & Photographic Technology
IDS 号: BHI20
ISSN: 0277-786X
ISBN: 978-0-8194-9777-2
________________________________________
第 27 条，共 77 条
标题: A novel weighted-direction color interpolation
作者: Tao, JY (Tao Jin-you); Yang, JF (Yang Jian-feng); Xue, B (Xue Bin); Liang, XF (Liang Xiao-fen); Qi, YH (Qi Yong-hong); Wang, F (Wang Feng)
编者: Ohta J; Wu N; Li B
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2013: IMAGING SENSORS AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8908  DOI: 10.1117/12.2032500  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: A digital camera capture images by covering the sensor surface with a color filter array (CFA), only get a color sample at pixel location. Demosaicking is a process by estimating the missing color components of each pixel to get a full resolution image. In this paper, a new algorithm based on edge adaptive and different weighting factors is proposed. Our method can effectively suppress undesirable artifacts. Experimental results based on Kodak images show that the proposed algorithm obtain higher quality images compared to other methods in numerical and visual aspects.
文献类型: Proceedings Paper
会议名称: 5th International Symposium on Photoelectronic Detection and Imaging (ISPDI) - Imaging Sensors and Applications
会议日期: JUN 25-27, 2013
会议地点: Beijing, PEOPLES R CHINA
作者关键词: Bayer; Interpolation; Demosaicing; Directional weighting; PSNR
Web of Science 类别: Optics; Imaging Science & Photographic Technology
研究方向: Optics; Imaging Science & Photographic Technology
IDS 号: BHI20
ISSN: 0277-786X
ISBN: 978-0-8194-9777-2
________________________________________
第 28 条，共 77 条
标题: Solid-state ultrafast all-optical x-ray imaging sensor enabling picosecond temporal resolution
作者: Wang, B (Wang, Bo); Bai, YL (Bai, Yonglin); Xu, P (Xu, Peng); Liu, BY (Liu, Baiyu); Zhu, BL (Zhu, Bingli); Yang, WZ (Yang, Wenzheng); Bai, XH (Bai, Xiaohong); Qin, JJ (Qin, Junjun); Gou, YS (Gou, Yongsheng)
编者: Ohta J; Wu N; Li B
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2013: IMAGING SENSORS AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8908  文献号:   DOI: 10.1117/12.2034893  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Here we report an ultrafast x-ray imaging sensor based on optical measurement of the effects of x-ray absorption and electron hole pair creation in a direct band-gap semiconductor. Our results indicate that this technology can be used to provide a new approach for x-ray detectors and x-ray imaging systems with picosecond temporal resolution at x-ray energies similar to 10 keV. The x-ray absorption in GaAs produces a transient, non-equilibrium, electron-hole pair distribution which is then sensed by the phase modulation of the optical probe beam. The basic physics of the detector, implementation considerations, and preliminary experimental data are presented and discussed. Through further development, this x-ray imaging sensor could provide insight into previously unmeasurable phenomena in many fields.
文献类型: Proceedings Paper
会议名称: 5th International Symposium on Photoelectronic Detection and Imaging (ISPDI) - Imaging Sensors and Applications
会议日期: JUN 25-27, 2013
会议地点: Beijing, PEOPLES R CHINA
作者关键词: ultrafast x-ray imaging sensor; probe laser; picosecond temporal resolution
Web of Science 类别: Optics; Imaging Science & Photographic Technology
研究方向: Optics; Imaging Science & Photographic Technology
IDS 号: BHI20
ISSN: 0277-786X
ISBN: 978-0-8194-9777-2
________________________________________
第 29 条，共 77 条
标题: Improved design of support for large aperture space lightweight mirror
作者: Wang, C (Wang, Chao); Ruan, P (Ruan, Ping); Liu, QM (Liu, Qimin)
编者: Ohta J; Wu N; Li B
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2013: IMAGING SENSORS AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8908  文献号:   DOI: 10.1117/12.2034456  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: In order to design a kind of rational large aperture space mirror which can adapt to the space gravity and thermal environment, by taking the choice of material, the lightweight of the mirror and the design of support into account in detail, a double-deck structure with traditional flexible hinge was designed, then the analytical mathematical model of the mirror system was established. The design adopts six supports on back. in order to avoid the constraints, mirror is connected to three middle transition pieces through six flexible hinges, and then the three transition pieces are connected to support plate through another three flexible hinges. However, the initial structure is unable to reach the expected design target and needs to be made further adjustments.
By improving and optimizing the original structure, a new type of flexible hinge in the shape of the letter A is designed finally. Compared with the traditional flexible hinge structure, the new structure is simpler and has less influence on the surface figure accuracy of mirror. By using the finite element analysis method, the static and dynamic characteristics as well as the thermal characteristics of the mirror system are analyzed. Analysis results show that the maximum PV value is 37 nm and the maximum RMS value is 10.4 nm when gravity load is applied. Furthermore, the maximum PV value is 46 nm and the maximum RMS value is 10.5 nm under the load case of gravity coupled with 4 degrees C uniform temperature rise. The results satisfy the index of optical design. The first order natural frequency of the mirror component is 130 Hz according to the conclusion obtained by modal analytical solution, so the mirror structure has high enough fundamental frequency. And, the structural strength can meet the demand under the overload and the random vibration environment respectively. It indicates that the mirror component structure has enough dynamic, static stiffness and thermal stability, meeting the design requirements.
文献类型: Proceedings Paper
会议名称: 5th International Symposium on Photoelectronic Detection and Imaging (ISPDI) - Imaging Sensors and Applications
会议日期: JUN 25-27, 2013
会议地点: Beijing, PEOPLES R CHINA
作者关键词: space mirror; lightweight; flexible support; finite element analysis; optimum design
Web of Science 类别: Optics; Imaging Science & Photographic Technology
研究方向: Optics; Imaging Science & Photographic Technology
IDS 号: BHI20
ISSN: 0277-786X
ISBN: 978-0-8194-9777-2
________________________________________
第 30 条，共 77 条
标题: Field-programmable gate array-based hardware architecture for high-speed camera with KAI-0340 CCD image sensor
作者: Wang, H (Wang Hao); Yan, S (Yan Su); Zhou, ZF (Zhou Zuofeng); Cao, JZ (Cao Jianzhong); Yan, AQ (Yan Aqi); Tang, LNA (Tang Liniao); Lei, YJ (Lei Yangjie)
编者: Ohta J; Wu N; Li B
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2013: IMAGING SENSORS AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8908  文献号:   DOI: 10.1117/12.2033013  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: We present a field-programmable gate array (FPGA)-based hardware architecture for high-speed camera which have fast auto-exposure control and colour filter array (CFA) demosaicing. The proposed hardware architecture includes the design of charge coupled devices (CCD) drive circuits, image processing circuits, and power supply circuits. CCD drive circuits transfer the TTL (Transistor-Transistor-Logic) level timing Sequences which is produced by image processing circuits to the timing Sequences under which CCD image sensor can output analog image signals. Image processing circuits convert the analog signals to digital signals which is processing subsequently, and the TTL timing, auto-exposure control, CFA demosaicing, and gamma correction is accomplished in this module. Power supply circuits provide the power for the whole system, which is very important for image quality. Power noises effect image quality directly, and we reduce power noises by hardware way, which is very effective. In this system, the CCD is KAI-0340 which is can output 210 full resolution frame-per-second, and our camera can work outstandingly in this mode. The speed of traditional auto-exposure control algorithms to reach a proper exposure level is so slow that it is necessary to develop a fast auto-exposure control method. We present a new auto-exposure algorithm which is fit high-speed camera. Color demosaicing is critical for digital cameras, because it converts a Bayer sensor mosaic output to a full color image, which determines the output image quality of the camera. Complexity algorithm can acquire high quality but cannot implement in hardware. An low-complexity demosaicing method is presented which can implement in hardware and satisfy the demand of quality. The experiment results are given in this paper in last.
文献类型: Proceedings Paper
会议名称: 5th International Symposium on Photoelectronic Detection and Imaging (ISPDI) - Imaging Sensors and Applications
会议日期: JUN 25-27, 2013
会议地点: Beijing, PEOPLES R CHINA
作者关键词: High-speed camera; Color demosaicing; Auto-exposure; FPGA
KeyWords Plus: INTERPOLATION; SYSTEM
Web of Science 类别: Optics; Imaging Science & Photographic Technology
研究方向: Optics; Imaging Science & Photographic Technology
IDS 号: BHI20
ISSN: 0277-786X
ISBN: 978-0-8194-9777-2
________________________________________
第 31 条，共 77 条
标题: A new primary mirror based on topology optimization
作者: Wang, X (Wang Xin); Wang, W (Wang Wei)
编者: Ohta J; Wu N; Li B
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2013: IMAGING SENSORS AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8908  DOI: 10.1117/12.2032227  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: The impact of the mirror self-weight or other structural stress may cause bad optical imaging quality. The large-diameter primary mirror was optimized based on variable density topology optimization method and in the condition of gravity to satisfy the design requirements. A new primary mirror has been designed, comparing which with the traditional lightweight primary mirror in the method of finite element analysis, the results prove that the new primary mirror is superior to the traditional model in the lightweight rate, surface accuracy and structural rigidity, so the paper puts forward a new idea in the lightweight design.
文献类型: Proceedings Paper
会议名称: 5th International Symposium on Photoelectronic Detection and Imaging (ISPDI) - Imaging Sensors and Applications
会议日期: JUN 25-27, 2013
会议地点: Beijing, PEOPLES R CHINA
作者关键词: primary mirror; topology optimization; finite element analysis; lightweight
Web of Science 类别: Optics; Imaging Science & Photographic Technology
研究方向: Optics; Imaging Science & Photographic Technology
IDS 号: BHI20
ISSN: 0277-786X
ISBN: 978-0-8194-9777-2
________________________________________
第 32 条，共 77 条
标题: Improved design of a pseudo-cassegrain optical system
作者: Yang, HL (Yang, Huanli); Chen, RL (Chen, Rongli); Liu, K (Liu, Kai); Lei, GZ (Lei, Guangzhi)
编者: Ohta J; Wu N; Li B
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2013: IMAGING SENSORS AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8908  文献号:   DOI: 10.1117/12.2034464  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: This paper uses a pseudo-cassegrain system as the initial structure, whose full field of view and F number are 5.6 degrees and 1.63, respectively. Then the authors make further improvements and optimization in large weights and serious central obscuration. The final system is designed with preference of smaller central obscuration, lower manufacturing difficulty, lighter, simpler configuration and lower cost compared with the initial pseudo-cassegrain optical system. In addition, what is different from the previous modified cassegrain system is that secondary mirror of the final system is a plane mirror which is easier to fabricate and install. At the same time, the final system has three significant characteristics of these three systems: cassegrain, maksutov and schmidt. At last, the dissertation certificates the feasibility of the new system in the angle of aberration analysis, spot diagram analysis and energy analysis. It also provides a new design method for the optical system of moderate field, large relative aperture and wide spectral.
文献类型: Proceedings Paper
会议名称: 5th International Symposium on Photoelectronic Detection and Imaging (ISPDI) - Imaging Sensors and Applications
会议日期: JUN 25-27, 2013
会议地点: Beijing, PEOPLES R CHINA
作者关键词: improved cassegrain optical system; central obscuration; plane mirror; aberration; spot diagram; energy analysis
Web of Science 类别: Optics; Imaging Science & Photographic Technology
研究方向: Optics; Imaging Science & Photographic Technology
IDS 号: BHI20
ISSN: 0277-786X
ISBN: 978-0-8194-9777-2
________________________________________
第 33 条，共 77 条
标题: A deployable telescope imaging system with coilable tensegrity structure for microsatellite application
作者: Zhao, C (Zhao, Chao); Li, C (Li, Chuang); Zhou, N (Zhou, Nan)
编者: Ohta J; Wu N; Li B
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2013: IMAGING SENSORS AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8908  文献号:   DOI: 10.1117/12.2033266  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Microsatellites will be widely applied as an earth-observing platform in coming future for their low costs. Such satellite missions require optical payloads with low cost, low mass and small volume. In order to meet these requirements, one way is to develop deployable telescopes. They not only maintain the capabilities of the traditional non-deployable telescopes, but also have compacter launch volume and lighter weight. We investigate a telescope with precise deployable structure based on coilable tensegrity. Before launch, the secondary mirror support structure is coiled, and when the satellite is in orbit, the secondary mirror is deployed with the elastic strain energy from the coiled longerons. There are mainly three parts in this paper. Firstly, the telescope optics is presented. A Ritchey-Chretien (RC) type optical system with 150mm aperture is designed. Secondly, the deployable telescope structure is designed for the RC system. The deployable structure mainly consists of coilable longerons, batten rings, and diagonal stringers. The finite element method (FEM) is used to analyze the dynamics of the unfolded telescope structure. Thirdly, the adjusting mechanism for secondary mirror is discussed. Piezoelectric actuators can be used to achieve remote alignment to improve the performance of the imaging system.
文献类型: Proceedings Paper
会议名称: 5th International Symposium on Photoelectronic Detection and Imaging (ISPDI) - Imaging Sensors and Applications
会议日期: JUN 25-27, 2013
会议地点: Beijing, PEOPLES R CHINA
作者关键词: deployable telescope; coilable tensegrity structure; imaging system; microsatellite application
Web of Science 类别: Optics; Imaging Science & Photographic Technology
研究方向: Optics; Imaging Science & Photographic Technology
IDS 号: BHI20
ISSN: 0277-786X
ISBN: 978-0-8194-9777-2
________________________________________
第 34 条，共 77 条
标题: Research on the method of fast photoelectric diagnostics based on ordinary CCD
作者: Zhu, BL (Zhu, Bingli); Bai, YL (Bai, Yonglin); Liu, BY (Liu, Baiyu); Wang, B (Wang, Bo); Bai, XH (Bai, Xiaohong); Gou, YS (Gou, Yongsheng); Qin, JJ (Qin, Junjun); Yang, WZ (Yang, Wenzheng)
编者: Ohta J; Wu N; Li B
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2013: IMAGING SENSORS AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8908  文献号:   DOI: 10.1117/12.2032841  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: A novel method to realize fast photoelectric diagnostics using ordinary CCD is presented. By changing the mode of charge transfer of CCD, fast photoelectric diagnostics of single point with linear CCD and high-speed line scanning with array CCD can be achieved respectively. A fast photoelectric diagnostics system of single point based on linear CCD has been designed and fabricated to investigate the feasibility of this method. A pulsed blue light emitting diode (LED) has been used to measure the system. As a proof of concept, the rate of photoelectric diagnostics of single point reachs up to 20 MHz. The results demonstrated that the method of fast photoelectric diagnostics based on ordinary CCD is feasible.
文献类型: Proceedings Paper
会议名称: 5th International Symposium on Photoelectronic Detection and Imaging (ISPDI) - Imaging Sensors and Applications
会议日期: JUN 25-27, 2013
会议地点: Beijing, PEOPLES R CHINA
作者关键词: CCD; Fast photoelectric diagnostics; High-speed imaging; Ultrahigh-speed CCD
KeyWords Plus: FRAMES
Web of Science 类别: Optics; Imaging Science & Photographic Technology
研究方向: Optics; Imaging Science & Photographic Technology
IDS 号: BHI20
ISSN: 0277-786X
ISBN: 978-0-8194-9777-2
________________________________________
第 35 条，共 77 条
标题: Development of the control circuits for the TID-CCD Stereo Camera of the Chang'E-2 satellite based on FPGAs
作者: Duan, YQ (Duan Yong-Qiang); Gao, W (Gao Wei); Qiao, WD (Qiao Wei-Dong); Wen, DS (Wen De-Sheng); Zhao, BC (Zhao Bao-Chang)
编者: Gong H; Shi Z; Chen Q; Lu J
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2013: INFRARED IMAGING AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8907  文献号: 89074U  DOI: 10.1117/12.2034877  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: The TDI-CCD Stereo Camera is the optical sensor on the Chang'E-2 (CE-2) satellite created for the Chinese Lunar Exploration Program. The camera was designed to acquire three-dimensional stereoscopic images of the lunar surface based upon three-line array photogrammetric theory. The primary objective of the camera is, (1) to obtain about 1-m pixel spatial resolution images of the preparative landing location from an ellipse orbit at an altitude of similar to 15km, and (2) to obtain about 7-m pixel spatial resolution global images of the Moon from a circular orbit at an altitude of similar to 100km. The focal plane of the camera is comprised of two TDI-CCDs. The control circuits of the camera are designed based on two SRAM-type FPGAs, XQR2V3000-4CG717. In this paper, a variable frequency control and multi-tap data readout technology for the TDI-CCD is presented, which is able to change the data processing capabilities according to the different orbit mode for the TDI-CCD stereo camera. By this way, the data rate of the camera is extremely reduced from 100Mbps to 25Mbps at high orbit mode, which is benefit to raise the reliability of the image transfer. The results of on-board flight validate that the proposed methodology is reasonable and reliable.
文献类型: Proceedings Paper
会议名称: 5th International Symposium on Photoelectronic Detection and Imaging (ISPDI) - Infrared Imaging and Applications
会议日期: JUN 25-27, 2013
会议地点: Beijing, PEOPLES R CHINA
作者关键词: Chinese Lunar Exploration Program; Chang'E-2 satellite; CE-2 satellite; TDI-CCD Stereo Camera; FPGA
Web of Science 类别: Optics; Imaging Science & Photographic Technology
研究方向: Optics; Imaging Science & Photographic Technology
IDS 号: BHH39
ISSN: 0277-786X
ISBN: 978-0-8194-9776-5
________________________________________
第 36 条，共 77 条
标题: Development of the electronics system prototype of the panoramic camera for space applications
作者: Duan, YQ (Duan Yong-Qiang); Gao, W (Gao Wei); Qiao, WD (Qiao Wei-Dong); Yang, JF (Yang Jian-Feng); Wen, DS (Wen De-Sheng)
编者: Gong H; Shi Z; Chen Q; Lu J
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2013: INFRARED IMAGING AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8907  文献号: 89074S  DOI: 10.1117/12.2034858  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: The stereoscopic panoramic camera is a kind of important optical payload for space applications. It can image the full 360 in azimuth to the goal scene and obtain high resolution three-dimensional images. Many science investigations can be conducted by scientists with these images, such as the analysis for the planet terrain and the geology. This kind of payload has common features such as light-weight, miniaturization, and lower power consumption. This paper presents the development of a stereoscopic, panoramic imaging system for space applications, which is a typical staring binocular stereo imaging system and consists of two identical digital cameras. Each camera was build based upon a CMOS APS (Complementary Metal Oxide Semiconductor Active Pixel Sensors) and a high density FPGA (Field Programmable Gate Array). The camera has the features with the weight of about 210g and the power consumption of about 660mW. In this paper, the design details of the electronics for the specifications above are emphasized, and the designs and implements of the FPGA are particularly discussed. Finally, the verification and experiment results for the stereoscopic panoramic camera show that the design methodology is feasible.
文献类型: Proceedings Paper
会议名称: 5th International Symposium on Photoelectronic Detection and Imaging (ISPDI) - Infrared Imaging and Applications
会议日期: JUN 25-27, 2013
会议地点: Beijing, PEOPLES R CHINA
作者关键词: Panoramic imaging; Stereo camera; CMOS APS; FPGA
Web of Science 类别: Optics; Imaging Science & Photographic Technology
研究方向: Optics; Imaging Science & Photographic Technology
IDS 号: BHH39
ISSN: 0277-786X
ISBN: 978-0-8194-9776-5
________________________________________
第 37 条，共 77 条
标题: An Improved Image Fusion Algorithm Based on Wavelet Transform
作者: Duan, ZW (Duan, Zewei); Wen, DS (Wen, Desheng); Song, ZX (Song, Zongxi)
编者: Gong H; Shi Z; Chen Q; Lu J
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2013: INFRARED IMAGING AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8907  文献号: 89070Y  DOI: 10.1117/12.2031878  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Image fusion takes a significant part in the technology of information enhancement. By analyzing the advantages and disadvantages of previous methods, this paper proposes an improved wavelet-transform-algorithm, which both considers the fusion methods of low-frequency and high-frequency components: On the low-frequency sub-band aspect, introducing a border detector operator in order to collect the border information of images that can be the basis of selective fusion method; On the high-frequency sub-band aspect, applying the local-standard-deviation to being the basis of selective and weighted-averaging fusion method. The experiments reveal that the proposed algorithm contributes to enhancing the definition and contract ratio of the fused images, thereby it's a valid method.
文献类型: Proceedings Paper
会议名称: 5th International Symposium on Photoelectronic Detection and Imaging (ISPDI) - Infrared Imaging and Applications
会议日期: JUN 25-27, 2013
会议地点: Beijing, PEOPLES R CHINA
作者关键词: Image fusion; wavelet-transform-algorithm; border information; local-standard-deviation
Web of Science 类别: Optics; Imaging Science & Photographic Technology
研究方向: Optics; Imaging Science & Photographic Technology
IDS 号: BHH39
ISSN: 0277-786X
ISBN: 978-0-8194-9776-5
________________________________________
第 38 条，共 77 条
标题: New scene-based adaptive bad pixel detection algorithm for IRFPA
作者: Leng, HB (Leng Han-bing); Zhou, ZF (Zhou Zuo-feng); Liu, W (Liu Wei); Yi, B (Yi Bo); Xie, QS (Xie Qing-sheng); Wu, DS (Wu Deng-shan); Cao, JZ (Cao Jian-zhong)
编者: Gong H; Shi Z; Chen Q; Lu J
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2013: INFRARED IMAGING AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8907  文献号: 89072T  DOI: 10.1117/12.2033162  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Traditional bad pixel detection algorithm is always based on the radiometric calibration. This method is easy to operate, but only suitable for the bad pixels whose positions are fixed. During the longtime operation period, environment temperature usually has drastic influence on IRFPA, the number of bad pixels often increase and their positions also vary, this result in the degradation of infrared image quality. In this paper, a new scene-based adaptive bad pixel detection algorithm is proposed for IRFPA. The algorithm firstly comparing the pixel value with its neighborhood, and affirm bad pixels preliminary through a suitable threshold. Then the potential bad pixels from different scene are matched, false bad pixels caused by scene and targets are eliminated, real bad pixels are confirmed. The essence of the proposed algorithm is using the correlation between the pixel and its neighborhood. The bad pixels and some targets in the scene have a weak correlation within neighborhoods, and the position of bad pixels varies slowly while the scene varies drastically when IRFPA is in use. This new method can be implemented in hardware easily and achieve the real time demand. With the real infrared images obtained from a camera, the experiment results show the effectiveness of the proposed algorithm.
文献类型: Proceedings Paper
会议名称: 5th International Symposium on Photoelectronic Detection and Imaging (ISPDI) - Infrared Imaging and Applications
会议日期: JUN 25-27, 2013
会议地点: Beijing, PEOPLES R CHINA
作者关键词: IRFPA; scene-based; adaptive bad pixel detection
Web of Science 类别: Optics; Imaging Science & Photographic Technology
研究方向: Optics; Imaging Science & Photographic Technology
IDS 号: BHH39
ISSN: 0277-786X
ISBN: 978-0-8194-9776-5
________________________________________
第 39 条，共 77 条
标题: Color interpolation algorithm of CCD based on green components and signal correlation
作者: Liang, XF (Liang, Xiaofen); Qiao, WD (Qiao, Weidong); Yang, JF (Yang, Jianfeng); Xue, B (Xue, Bin); Qin, J (Qin, Jia)
编者: Gong H; Shi Z; Chen Q; Lu J
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2013: INFRARED IMAGING AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8907  文献号:   DOI: 10.1117/12.2033293  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Signal CCD/CMOS sensors capture image information by covering the sensor surface with a color filter array(CFA). For each pixel, only one of three primary colors(red, green and blue) can pass through the color filter array(CFA). The other two missing color components are estimated by the values of the surrounding pixels. In Bayer array, the green components are half of the total pixels, but both red pixel and blue pixel components are quarter, so green components contain more information, which can be reference to color interpolation of red components and blue components. Based on this principle, in this paper, a simple and effective color interpolation algorithm based on green components and signal correlation for Bayer pattern images was proposed. The first step is to interpolate R, G and B components using the method-bilinear interpolation. The second step is to revise the results of bilinear interpolation by adding some green components on the results of bilinear interpolation. The calculation of the values to be added should consider the influence of correlation between the three channels. There are two major contributions in the paper. The first one is to demosaick G component more precisely. The second one is the spectral-spatial correlations between the three color channels is taken into consideration. At last, through MATLAB simulation experiments, experimental pictures and quantitative data for performance evaluation-Peak Signal to Noise Ratio(PSNR) were gotten. The results of simulation experiments show, compared with other color interpolation algorithms, the proposed algorithm performs well in both visual perception and PSNR measurement. And the proposed algorithm does not increase the complexity of calculation but ensures the real-time of system. Theory and experiments show the method is reasonable and has important engineering significance.
文献类型: Proceedings Paper
会议名称: 5th International Symposium on Photoelectronic Detection and Imaging (ISPDI) - Infrared Imaging and Applications
会议日期: JUN 25-27, 2013
会议地点: Beijing, PEOPLES R CHINA
作者关键词: Bilinear interpolation; Demosaicing; Interpolation algorithm; PSNR
Web of Science 类别: Optics; Imaging Science & Photographic Technology
研究方向: Optics; Imaging Science & Photographic Technology
IDS 号: BHH39
ISSN: 0277-786X
ISBN: 978-0-8194-9776-5
________________________________________
第 40 条，共 77 条
标题: A New Algorithm of Inter-frame Filtering in IR Image Based on Threshold Value
作者: Liu, W (Liu Wei); Leng, HB (Leng Hanbing); Chen, WN (Chen Weining); Yang, HT (Yang Hongtao); Xie, QS (Xie Qingsheng); Yi, B (Yi Bo); Zhang, HF (Zhang Haifeng)
编者: Gong H; Shi Z; Chen Q; Lu J
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2013: INFRARED IMAGING AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8907  文献号: 89072N  DOI: 10.1117/12.2033067  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: This paper proposed a new algorithm of inter-frame filtering in IR image based on threshold value for the purpose of solving image blur and smear brought by traditional inter-frame filtering algorithm. At first, it finds out causes of image blur and smear by analyzing general inter-frame filtering algorithm and dynamic inter-frame filtering algorithm, hence to bring up a new kind of time-domain filter. In order to obtain coefficients of the filter, it firstly gets difference image of present image and previous image, and then, it gets noisy threshold value by analyzing difference image with probability analysis method. The relationship between difference image and threshold value helps obtaining the coefficients of filter. At last, inter-frame filtering method is adopted to process pixels interrupted by noise. The experimental result shows that this algorithm has successfully repressed IR image blur and smear, and NETD tested by traditional inter filtering algorithm and the new algorithm are respectively 78mK and 70mK, which shows it has a better noise reduction performance than traditional ones. The algorithm is not only applied to still image, but also to sports image. As a new algorithm with great practical value, it is easy to achieve on FPGA, of excellent real-time performance and it effectively extends application scope of time domain filtering algorithm.
文献类型: Proceedings Paper
会议名称: 5th International Symposium on Photoelectronic Detection and Imaging (ISPDI) - Infrared Imaging and Applications
会议日期: JUN 25-27, 2013
会议地点: Beijing, PEOPLES R CHINA
作者关键词: Infrared image; Inter-frame filtering; Blurring; Smearing; Time-domain filter; IR camera; Noise; Algorithm
Web of Science 类别: Optics; Imaging Science & Photographic Technology
研究方向: Optics; Imaging Science & Photographic Technology
IDS 号: BHH39
ISSN: 0277-786X
ISBN: 978-0-8194-9776-5
________________________________________
第 41 条，共 77 条
标题: Calculation of signal-to-noise ratio (SNR) of infrared detection system based on MODTRAN Model
作者: Lu, X (Lu, Xue); Li, C (Li, Chuang); Fan, XW (Fan, Xuewu)
编者: Gong H; Shi Z; Chen Q; Lu J
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2013: INFRARED IMAGING AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8907  文献号: 89072K  DOI: 10.1117/12.2033048  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Signal-to-noise ratio (SNR) is an important parameter of infrared detection system. SNR of infrared detection system is determined by the target infrared radiation, atmospheric transmittance, background infrared radiation and the detector noise. The infrared radiation flux in the atmosphere is determined by the selective absorption of the gas molecules, the atmospheric environment, and the transmission distance of the radiation, etc, so the atmospheric transmittance and infrared radiance flux are intricate parameters. A radiometric model for the calculation of SNR of infrared detection system is developed and used to evaluate the effects of various parameters on signal-to-noise ratio (SNR). An atmospheric modeling tool, MODTRAN, is used to model wavelength-dependent atmospheric transmission and sky background radiance. Then a new expression of SNR is deduced. Instead of using constants such as average atmospheric transmission and average wavelength in traditional method, it uses discrete values for atmospheric transmission and sky background radiance. The integrals in general expression of SNR are converted to summations. The accuracy of SNR obtained from the new method can be improved. By adopting atmospheric condition of the 1976 US standard, no clouds urban aerosols, fall-winter aerosol profiles, the typical spectrum characters of sky background radiance and transmittance are computed by MODTRON. Then the operating ranges corresponding to the threshold quantity of SNR are calculated with the new method. The calculated operating ranges are more close to the measured operating range than those calculated with the traditional method.
文献类型: Proceedings Paper
会议名称: 5th International Symposium on Photoelectronic Detection and Imaging (ISPDI) - Infrared Imaging and Applications
会议日期: JUN 25-27, 2013
会议地点: Beijing, PEOPLES R CHINA
作者关键词: infrared radiation; atmospheric transmission; sky background radiation; SNR; MODTRAN
Web of Science 类别: Optics; Imaging Science & Photographic Technology
研究方向: Optics; Imaging Science & Photographic Technology
IDS 号: BHH39
ISSN: 0277-786X
ISBN: 978-0-8194-9776-5
________________________________________
第 42 条，共 77 条
标题: A New Infrared Image Processing Method Based on Compressed Sensing
作者: Mu, CH (Mu, Chenhao); Qiu, YH (Qiu, Yuehong); Chen, Z (Chen, Zhi)
编者: Gong H; Shi Z; Chen Q; Lu J
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2013: INFRARED IMAGING AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8907  文献号: 89073F  DOI: 10.1117/12.2033567  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: In order to improve the efficiency of processing the large amount of data of infrared image, in this paper we develop a new infrared image processing method based on compressed sensing (CS) and simulate the method. The basic idea behind CS is that a signal or image, unknown but supposed to be compressible by a known transform, (eg. wavelet), can be subjected to fewer measurements than the nominal number of pixels, and yet be accurately reconstructed. According to the properties of wavelet transform sub-bands, firstly we make wavelet transform which change the infrared image into a wavelet coefficients matrix. Acquired the features of infrared image, the characters of the wavelet coefficients can be concluded. When deeply analyzing the data of the wavelet coefficient, we can easily find the high-pass wavelet coefficients of the image are sparse enough to measure, while the low-pass wavelet coefficients are not appropriate for measure. So in this second part, only measured the high-pass wavelet coefficients of the image but preserving the low-pass wavelet coefficients. For the reconstruction, the third part, by using the orthogonal matching pursuit (OMP) algorithm, high-pass wavelet coefficients could be recovered by the measurements. Finally the image could be reconstructed by the inverse wavelet transform. The simulation proves that applying the CS theory to the realm of infrared picture can decrease the amount of data which must be collected. Besides, compared with the original compressed sensing algorithm, simulation results demonstrated that the proposed algorithm improved the quality of the recovered image significantly.
文献类型: Proceedings Paper
会议名称: 5th International Symposium on Photoelectronic Detection and Imaging (ISPDI) - Infrared Imaging and Applications
会议日期: JUN 25-27, 2013
会议地点: Beijing, PEOPLES R CHINA
作者关键词: infrared image; compressed sensing; wavelet transform; orthogonal matching pursuit
KeyWords Plus: PURSUIT
Web of Science 类别: Optics; Imaging Science & Photographic Technology
研究方向: Optics; Imaging Science & Photographic Technology
IDS 号: BHH39
ISSN: 0277-786X
ISBN: 978-0-8194-9776-5
________________________________________
第 43 条，共 77 条
标题: A Multi-exposure Image Fusion Method Based on Wavelet Packet Transform
作者: Wang, Q (Wang, Qi); Song, ZX (Song, Zongxi); Gao, W (Gao, Wei)
编者: Gong H; Shi Z; Chen Q; Lu J
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2013: INFRARED IMAGING AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8907  文献号: 89070X  DOI: 10.1117/12.2031837  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: This paper presents a method for multi-exposure images fusion based on wavelet packet transform, combining the local energy distributions of multi-exposure images with the edge detection. After decomposing two images involved in fusion into sub images in low-frequency and high-frequency with wavelet packet transform, we use different methods for low-frequency and high-frequency to obtain fusion coefficients. In low frequency processing, the method that threshold value is set for local energy is used while the edge detection method is used in high frequency, where the edge detection operator help compute the information quantity of different high frequency images. Then the coefficients for fusion are selected according to different strategies adopted for low-and high-frequency. Finally, the fusion image is reconstructed through inverse wavelet packet transform. The result shows that the fusion method is effective and the fusion image can preserve the details of the each input image successfully.
文献类型: Proceedings Paper
会议名称: 5th International Symposium on Photoelectronic Detection and Imaging (ISPDI) - Infrared Imaging and Applications
会议日期: JUN 25-27, 2013
会议地点: Beijing, PEOPLES R CHINA
作者关键词: multi-exposure image fusion; wavelet packet transform; local energy; edge detection
Web of Science 类别: Optics; Imaging Science & Photographic Technology
研究方向: Optics; Imaging Science & Photographic Technology
IDS 号: BHH39
ISSN: 0277-786X
ISBN: 978-0-8194-9776-5
________________________________________
第 44 条，共 77 条
标题: Design of compact apochromatic lens with very-broad spectrum and high resolution
作者: Yan, A (Yan Aqi); Cao, JZ (Cao Jianzhong); Zhang, J (Zhang Jian); Zhang, Z (Zhang Zhi); Wang, H (Wang Hao); Wu, DS (Wu Dengshan); Zuofeng, F (Zhou Zuofeng); Zhang, KS (Zhang Kaisheng); Lei, YJ (Lei Yangjie)
编者: Gong H; Shi Z; Chen Q; Lu J
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2013: INFRARED IMAGING AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8907  文献号: 89070A  DOI: 10.1117/12.2030546  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: This paper designs a compact apochromatic lens with long focal length, which operates over very-broad spectrum from 400nm to 900nm for high resolution image application. The focal length is 290mm, and F-number is 4.5. In order to match CCD sensor, lens resolution must be higher than 100lp/mm. It is a significant challenge to correct secondary spectrum over very-broad spectrum for this application. The paper firstly pays much attention on dispersion characteristic of optical materials over this very-broad spectrum, and dispersion characteristic of glasses is analyzed. After properly glasses combinations and optimal lens structure selected, this compact apochromatic lens is designed. The lens described in this paper comprises fewer lenses, most of them are ordinary optical materials, and only one special flint type TF3 with anomalous dispersion properties is used for secondary spectrum correction. Finally, the paper shows MTF and aberration curve for performance evaluation. It can be seen that MTF of the designed lens nearly reach diffraction limit at Nyquist frequency 100lp/mm, and residual secondary spectrum is greatly reduced to less than 0.03mm (in the lines 550nm and 787.5nm). The overall length of this compact apochromatic lens is just 0.76 times its focal length, and because of fewer lenses and ordinary optical materials widely used, production cost is also greatly reduced.
文献类型: Proceedings Paper
会议名称: 5th International Symposium on Photoelectronic Detection and Imaging (ISPDI) - Infrared Imaging and Applications
会议日期: JUN 25-27, 2013
会议地点: Beijing, PEOPLES R CHINA
作者关键词: Optical design; Achromatized lens; Secondary spectrum; Wide spectrum; High resolution
Web of Science 类别: Optics; Imaging Science & Photographic Technology
研究方向: Optics; Imaging Science & Photographic Technology
IDS 号: BHH39
ISSN: 0277-786X
ISBN: 978-0-8194-9776-5
________________________________________
第 45 条，共 77 条
标题: Design of The Segmented Primary Optical Telescope
作者: Zhang, KS (Zhang Kaisheng); Yan, AQ (Yan Aqi); Cao, JZ (Cao Jianzhong); Fan, ZY (Fan Zheyuan); Wu, L (Wu Li); Zhang, Z (Zhang Zhi); Zhu, Q (Zhu Qing)
编者: Gong H; Shi Z; Chen Q; Lu J
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2013: INFRARED IMAGING AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8907  文献号: 89073O  DOI: 10.1117/12.2034071  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Following with the "high-resolution upsurge" appeared in many counties in recent few years, it is an inevitable trend to increase the size of the Optical Telescope. However, because of the volume constrains of space-borne astronomical instruments, segmented reflector is thought as the main measure of future astro-physical missions by many scientists. In this paper, a coaxial three-mirror anastigmatic system (TMA) with a segmented primary mirror is modeled in optical software. The optical system, which has 2.4m aperture, 48m focal length and the field-view angle of 0.3 degrees x0.06 degrees, works in the 450nm similar to 900nm wave band. The '1+6' aperture-stiching model is applied. Firstly, the initial structure of the system is inputted to the CODEV, and a certain constraint functions are set, and then the system automatically optimizes. Finally, designing results show that the Modulation Transfer Function (MTF) is really very near to the limit of diffraction. We get a good image quality of the optical system design results.
文献类型: Proceedings Paper
会议名称: 5th International Symposium on Photoelectronic Detection and Imaging (ISPDI) - Infrared Imaging and Applications
会议日期: JUN 25-27, 2013
会议地点: Beijing, PEOPLES R CHINA
作者关键词: High-resolution upsurge; Segmented reflectors; Three mirror anastigmatic; Modulation Transfer Function
Web of Science 类别: Optics; Imaging Science & Photographic Technology
研究方向: Optics; Imaging Science & Photographic Technology
IDS 号: BHH39
ISSN: 0277-786X
ISBN: 978-0-8194-9776-5
________________________________________
第 46 条，共 77 条
标题: Infrared and Visible Image Fusion Based on Region Growing and Contourlet Transform
作者: Zhao, BJ (Zhao, Bingjie); Gao, W (Gao, Wei); Song, ZX (Song, Zongxi)
编者: Gong H; Shi Z; Chen Q; Lu J
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2013: INFRARED IMAGING AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8907  文献号: 89070P  DOI: 10.1117/12.2031627  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: According to the characteristics of infrared and visible images, a new image fusion method based on region growing and contourlet transform is proposed in this paper. To obtain more complementary information, the method is designed as a two-stage procedure. Firstly, the input infrared image is processed with region growing to segment the thermal target. Different fusion rules are adopted in target and background regions, respectively. For the target region, local energy is utilized as the fusion rule of the first fusion to fuse the thermal target and the visible image, while for the non-target region, we reserve the visible background information. Secondly, in order to fully add original information of the source images and avoid loss of information caused by segmentation, we make the second fusion between the visible image and the result image of the one-stage fusion. For good properties of localization, directionality and anisotropy, we adopt contourlet transform as the second fusion method. Experiments are carried out and the results show that our method is clearer in visual quality and effective in quantitative evaluations and the fused images are better than those resulting of using wavelet transform and contourlet transform.
文献类型: Proceedings Paper
会议名称: 5th International Symposium on Photoelectronic Detection and Imaging (ISPDI) - Infrared Imaging and Applications
会议日期: JUN 25-27, 2013
会议地点: Beijing, PEOPLES R CHINA
作者关键词: contourlet transform; image fusion; infrared image; visible image; region growing
Web of Science 类别: Optics; Imaging Science & Photographic Technology
研究方向: Optics; Imaging Science & Photographic Technology
IDS 号: BHH39
ISSN: 0277-786X
ISBN: 978-0-8194-9776-5
________________________________________
第 47 条，共 77 条
标题: Design of Lens-hood in the Space Fisheye Optical System
作者: Zhu, Q (Zhu Qing); Zhang, ZH (Zhang Zhao-hui); Zhang, Z (Zhang Zhi); Yan, A (Yan Aqi); Cao, JZ (Cao Jian-zhong); Zhang, KS (Zhang Kai-sheng)
编者: Gong H; Shi Z; Chen Q; Lu J
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2013: INFRARED IMAGING AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8907  文献号: 89071A  DOI: 10.1117/12.2032304  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Due to the extra wide field of view, fisheye optical systems are appropriately applied in space camera for scouting large-scale objects with near-distance. At the same time, because of the violent sunlight linger within the field of view more than other optical system and more stray light occur during the period, to design proper lens-hood can effectively reduce the sunshine time. Another distinct characteristic of fisheye optical system is the first protrude lens, which is contrived with negative focus to trace the ray with angle about even above 90 degree of incidence. Consequently, the first lens is in danger of damaging by scratching when operating the camera during the ground experiments without lens-hood. Whereas on account of the huge distortion which is the third mainly characteristic of fisheye optical system, to design appropriate lens-hood is a tough work comparing with other low-distortion optical system, especially for those whose half diagonal field is more than 90 degrees. In this paper, an research carried out on the design lens-hood for fisheye is proposed. In the way of reverse ray-tracing, the location on the first lens and point-vector for each incident ray can be accurately calculated. Thus the incident ray intersecting the first lens corresponds to the boundary of the image sensor form the effective object space. According to the figure of the lens and the incident rays, the lens-hood can be confirmed. In the proposed method, a space fisheye lens is presented as a typical lens, whose horizontal field and vertical field are 134 degrees, diagonal field is up to 192 degrees, respectively. The results of design for the lens-hood show that the lingering time of sunshine is shorten because of obstructing some redundant sunlight, and the first outstanding lens are protected in the most degree.
文献类型: Proceedings Paper
会议名称: 5th International Symposium on Photoelectronic Detection and Imaging (ISPDI) - Infrared Imaging and Applications
会议日期: JUN 25-27, 2013
会议地点: Beijing, PEOPLES R CHINA
作者关键词: Space optical system; Fisheye; Lens-hood
Web of Science 类别: Optics; Imaging Science & Photographic Technology
研究方向: Optics; Imaging Science & Photographic Technology
IDS 号: BHH39
ISSN: 0277-786X
ISBN: 978-0-8194-9776-5
________________________________________
第 48 条，共 77 条
标题: Theoretical and experimental study on methods for increasing squeezed level in the generation of squeezed light
作者: Feng, F (Feng Fei); Qu, WY (Qu Wen-yan); Song, JZ (Song Jia-zheng); Zhang, TY (Zhang Tong-yi)
编者: Wilson KE; Ma J; Liu L; Jiang H; Ke X
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2013: LASER COMMUNICATION TECHNOLOGIES AND SYSTEMS  丛书: Proceedings of SPIE  卷: 8906  文献号:   DOI: 10.1117/12.2034574  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: We demonstrate the methods for increasing the observed squeezing level in the generation of squeezed states of light at 1064 nm with periodically poled KTiOPO4 (PPKTP) crystal. We analyze the technical limits to the reduction of noise in the squeezed quadrature theoretically, including the intra-cavity loss of the optical parametric amplifier (OPA) cavity, the normalized amplitude, the detection frequency, and the mode matching on the balanced homodyning stage. To observe a high degree of squeezing, we improve the quality of mode matching into the OPA cavity and the mode cleaning (MC) cavity experimentally. By optimizing mode matching of the light into cavities, the finesse of the cavities would be higher in practice and the desirable spatial mode can be realized. As the intensity noise of the laser light reach the shot noise limit above the frequency of 1 MHz, which is sufficient for our experiment, so the MC cavity is incorporated to filter higher-order transverse modes of the local oscillator (LO) beam for the balanced homodyne detection. The experimental and theoretical results show that it is essential to optimize the mode matching efficiency to generate and detect high degree of squeezing otherwise an inefficiency mode matching will throw away the squeezing and transform the squeezed field into a vacuum field.
文献类型: Proceedings Paper
会议名称: 5th International Symposium on Photoelectronic Detection and Imaging (ISPDI) - Laser Communication Technologies and Systems
会议日期: JUN 25-27, 2013
会议地点: Beijing, PEOPLES R CHINA
作者关键词: Squeezed light; Squeezed level; Mode matching; Balanced homodyne detection
Web of Science 类别: Engineering, Electrical & Electronic; Optics; Physics, Applied; Imaging Science & Photographic Technology
研究方向: Engineering; Optics; Physics; Imaging Science & Photographic Technology
IDS 号: BHH71
ISSN: 0277-786X
ISBN: 978-0-8194-9775-8
________________________________________
第 49 条，共 77 条
标题: The influence of atmospheric turbulence on IM/DD space optical communication system
作者: Wei, AH (Wei Anhai); Han, B (Han Biao); Zhao, W (Zhao Wei); Xie, XP (Xie Xiaoping); Hu, H (Hu Hui); Su, YL (Su Yulong); Zhang, KW (Zhang Kewei)
编者: Wilson KE; Ma J; Liu L; Jiang H; Ke X
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2013: LASER COMMUNICATION TECHNOLOGIES AND SYSTEMS  丛书: Proceedings of SPIE  卷: 8906  文献号:   DOI: 10.1117/12.2033028  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Lots of researches have simulated performance of optical system based on plane wave or spherical wave model, but optical field is Gauss distribution in real optical communication system. So we derive the relationships between the signal-to-noise ratio (SNR), bit error rate (BER), channel capacity (C) and the transmission distance of the space laser communication system, which is obtained by the Gaussian beam propagation model for on-off keying (OOK) modulated signal under horizontal link. We numerically study the influence of atmospheric turbulence on system performance. we get the conclusions: Under weak turbulence intensity, as the turbulence intensity increases, the C and SNR for OOK modulated space laser communication system decrease while the BER increase; In the case of strong turbulence intensity, the intensity scintillation and the BER dramatically increase with the increase of transmission distance, and then become saturated; In the condition of turbulence intensity and transmission distance are both constant, the longer the wavelength results in greater C, higher SNR and lower BER. Selecting longer communication wavelength can mitigate the impact of the atmosphere turbulence on the communication system in some extent.
文献类型: Proceedings Paper
会议名称: 5th International Symposium on Photoelectronic Detection and Imaging (ISPDI) - Laser Communication Technologies and Systems
会议日期: JUN 25-27, 2013
会议地点: Beijing, PEOPLES R CHINA
作者关键词: atmospheric turbulence; Gaussian beam; SNR; C; BER
Web of Science 类别: Engineering, Electrical & Electronic; Optics; Physics, Applied; Imaging Science & Photographic Technology
研究方向: Engineering; Optics; Physics; Imaging Science & Photographic Technology
IDS 号: BHH71
ISSN: 0277-786X
ISBN: 978-0-8194-9775-8
________________________________________
第 50 条，共 77 条
标题: Optimal design of a new type space laser communication optical system
作者: Yan, PP (Yan Pei-pei); Deng, XG (Deng Xiao-guo); Zhang, HJ (Zhang Heng-jin)
编者: Wilson KE; Ma J; Liu L; Jiang H; Ke X
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2013: LASER COMMUNICATION TECHNOLOGIES AND SYSTEMS  丛书: Proceedings of SPIE  卷: 8906  文献号:   DOI: 10.1117/12.2030551  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: A design of a laser communications optical system with high transmitting and receiving performance is given. The traditional on-axis Cassegrain optical antenna has the default that the transmitting and receiving power decreased greatly because of the obscuration of the secondary mirror. Considering that the eccentric-pupil Cassegrain optical antenna is designed. The optical antenna system in transceiver has been designed by means of CODEV software. It improves the efficiency of transmitting and receiving power effectively. Its properties have been analyzed, such as gain, image quality, and transmission efficiency. Meanwhile, the materials of optical elements have been analyzed. The power decline curve has been obtained by means of the detailed analysis of antenna system in partial axis situation. The system includes transmitter channel, receiving channel and experiment channel. It can realize the functions of transmitter-receiver isolation and multi-light ways using dichroic mirrors and beam splitting prisms. The system volume and weight are reduced greatly. The complexity of conventional laser communication system is reduced enormously at the same time. It has important reference significance and application value.
文献类型: Proceedings Paper
会议名称: 5th International Symposium on Photoelectronic Detection and Imaging (ISPDI) - Laser Communication Technologies and Systems
会议日期: JUN 25-27, 2013
会议地点: Beijing, PEOPLES R CHINA
作者关键词: Space optical communications; Optical system design; Eccentric-pupil system; Optical antenna
KeyWords Plus: COMMUNICATIONS DEMONSTRATOR
Web of Science 类别: Engineering, Electrical & Electronic; Optics; Physics, Applied; Imaging Science & Photographic Technology
研究方向: Engineering; Optics; Physics; Imaging Science & Photographic Technology
IDS 号: BHH71
ISSN: 0277-786X
ISBN: 978-0-8194-9775-8

第 51 条，共 77 条
标题: Experimental research of optical preamplifier receiver for RZ-DPSK based on delay interferometer
作者: Zhang, KW (Zhang Ke-wei); Wang, W (Wang Wei); Zhao, W (Zhao Wei); Xie, XP (Xie Xiao-ping); Qian, FC (Qian Feng-chen)
编者: Wilson KE; Ma J; Liu L; Jiang H; Ke X
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2013: LASER COMMUNICATION TECHNOLOGIES AND SYSTEMS  丛书: Proceedings of SPIE  卷: 8906  文献号:   DOI: 10.1117/12.2032798  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: We present simulation results for a 5 Gb/s optically pre-amplified, differential phase shift keying communication system achieving -48.1 dBm (about 24.7 photons/bit) receiver sensitivity at 10(-9) bit-error-rate and using an optical delay line interferometer made by ourselves with 1 bit delay as the demodulator. The system is also experimental tested and sensitivity of the receiver is -36.5 dBm (about 106.6 photons/bit). The experimental results have some penalty in sensitivity comparing to the results in the simulation because the 1 bit delay interferometer is sensitive to the environment such as temperature, tremble and so on. To our knowledge if the interferometer is well designed and optimized, the experimental results can correspond with the simulative results and an optically pre-amplified direct detection DPSK receiver with high sensitivity can be realized.
文献类型: Proceedings Paper
会议名称: 5th International Symposium on Photoelectronic Detection and Imaging (ISPDI) - Laser Communication Technologies and Systems
会议日期: JUN 25-27, 2013
会议地点: Beijing, PEOPLES R CHINA
作者关键词: optical communication; Differential Phase Shift Keying (DPSK); delay interferometer; optical pre-amplified receiver
KeyWords Plus: TRANSMISSION; SYSTEMS; SENSITIVITY; PERFORMANCE; ROBUSTNESS; IMPACT
Web of Science 类别: Engineering, Electrical & Electronic; Optics; Physics, Applied; Imaging Science & Photographic Technology
研究方向: Engineering; Optics; Physics; Imaging Science & Photographic Technology
IDS 号: BHH71
ISSN: 0277-786X
ISBN: 978-0-8194-9775-8
________________________________________
第 52 条，共 77 条
标题: The Application of Auto-gated Power Supply in ICCD Camera
作者: Bai, Z (Bai Zhe); Zhang, J (Zhang Jian); Fan, XW (Fan Xue-wu); Xiang, SM (Xiang Shi-ming)
编者: Chang B; Guo H
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2013: LOW-LIGHT-LEVEL TECHNOLOGY AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8912  文献号: 89121H  DOI: 10.1117/12.2034761  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Intensified CCD (ICCD) imagers have been widely used in low light level imaging system. While the ICCD has smaller dynamic range in ubiquity, and its output image is prone to saturation in high light level. In this paper, the auto-gated power supply method is put forward to implementing automatic brightness control (ABC). Consequently, the ICCD camera imaging dynamic range is improved. Firstly, the principle of the auto-gated power supply is described briefly, and the design scheme is carried out in detail. The pulse power control mode is adopted to the photocathode instead of the traditional high voltage DC power supply, and the analog adjustment mode is adopted to the micro channel plate (MCP). Secondly, an imaging experiment for ICCD camera was made to validate the auto-gated power supply design, and the experiment results are presented. The results indicated that the design is valid, and the auto-gated power supply method helps to improve the image quality of the ICCD camera. Finally, the key problems in the design are analyzed and summarized in detail.
文献类型: Proceedings Paper
会议名称: 5th International Symposium on Photoelectronic Detection and Imaging (ISPDI) - Low-Light-Level Technology and Applications
会议日期: JUN 25-27, 2013
会议地点: Beijing, PEOPLES R CHINA
作者关键词: Auto-gated power supply; ICCD camera; Dynamic range; ABC; Low light level imaging
KeyWords Plus: IMAGE INTENSIFIER
Web of Science 类别: Optics; Physics, Applied
研究方向: Optics; Physics
IDS 号: BHG61
ISSN: 0277-786X
ISBN: 978-0-8194-9781-9
________________________________________
第 53 条，共 77 条
标题: Theoretical study on balanced homodyne detection technique in preparation of squeezed states of light
作者: Qu, WY (Qu Wen-yan); Feng, F (Feng Fei); Song, JZ (Song Jia-zheng); Zhang, TY (Zhang Tong-yi)
编者: Chang B; Guo H
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2013: LOW-LIGHT-LEVEL TECHNOLOGY AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8912  文献号: 891218  DOI: 10.1117/12.2034576  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: We analyze the balanced homodyne detection technique in the detection of squeezed light, which is controlled by dither locking scheme. We discuss how the balanced homodyne detection efficiency influences the detected degree of squeezing. Also, fluctuation in the relative phase between the local beam and the squeezed light is discussed, since a little phase fluctuation would decrease the detected degree of squeezing greatly. Then, the dither locking technique is studied in detail, which is used to lock the relative phase between the local beam and the squeezed light. The simulation experiments and theoretically results show that the balanced homodyne detection technique and the dither locking scheme are efficient methods to get more accurate degree of squeezing in the preparation of the squeezed states of light.
文献类型: Proceedings Paper
会议名称: 5th International Symposium on Photoelectronic Detection and Imaging (ISPDI) - Low-Light-Level Technology and Applications
会议日期: JUN 25-27, 2013
会议地点: Beijing, PEOPLES R CHINA
作者关键词: Squeezed light; Balanced homodyne detection; Dither locking
Web of Science 类别: Optics; Physics, Applied
研究方向: Optics; Physics
IDS 号: BHG61
ISSN: 0277-786X
ISBN: 978-0-8194-9781-9
________________________________________
第 54 条，共 77 条
标题: Analysis of terahertz generation characteristic affected by injured photoconductive antenna
作者: Li, H (Li Hui); Fan, WH (Fan Wen-hui); Liu, J (Liu Jia)
编者: Rahm M; Vodopyanov K; Shi W; Zhang C
来源出版物: INTERNATIONAL SYMPOSIUM ON PHOTOELECTRONIC DETECTION AND IMAGING 2013: TERAHERTZ TECHNOLOGIES AND APPLICATIONS  丛书: Proceedings of SPIE  卷: 8909  文献号:   DOI: 10.1117/12.2033033  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: In this paper, we deployed a home-made THz time-domain system and experimentally investigated the influence of impairment on photoconductive antenna. The low temperature grown GaAs photoconductive antenna (PCA) was used as THz emitter and a < 110 > ZnTe crystal modulating the probe beam to detect the THz field based on electro-optic sampling. By adjusting the position of laser spot on PCA gap, we found that the generated THz signal was quite different as the laser beam irradiating on different position of the antenna's gap. Moreover, we found that the small burned holes on the edge of both metal electrodes may affect the electric field of the antenna. Furthermore, we simulated the electric field of the PCA with a DC biased voltage applied across the electrodes, and found that the simulation results agreed with the experimental phenomenon, which can well demonstrated that the impairments on the antenna electrodes have a great influence on THz generation.
文献类型: Proceedings Paper
会议名称: 5th International Symposium on Photoelectronic Detection and Imaging (ISPDI) - Terahertz Technologies and Applications
会议日期: JUN 25-27, 2013
会议地点: Beijing, PEOPLES R CHINA
作者关键词: THz generation; Photoconductive antenna; Antenna simulation; Electrode
KeyWords Plus: TIME-DOMAIN SPECTROSCOPY; THZ; RADIATION
Web of Science 类别: Optics; Physics, Applied; Imaging Science & Photographic Technology
研究方向: Optics; Physics; Imaging Science & Photographic Technology
IDS 号: BHH67
ISSN: 0277-786X
ISBN: 978-0-8194-9778-9
________________________________________
第 55 条，共 77 条
标题: Design of calibration system for a great quantity of high precision scientific grade CCD cameras
作者: Tan, JH (Tan Jia-hai); Li, PY (Li Peng-yu); Qu, YS (Qu You-shan); Han, YM (Han Ya-meng); Yu, YL (Yu Ya-li); Wang, W (Wang Wei)
书籍作者: Xu, JM (Xu, JM)
来源出版物: 2013 INTERNATIONAL CONFERENCE ON PROCESS EQUIPMENT, MECHATRONICS ENGINEERING AND MATERIAL SCIENCE  丛书: Applied Mechanics and Materials  卷: 331  页: 326-330  DOI: 10.4028/www.scientific.net/AMM.331.326  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: For the calibration of a great quantity of scientific grade CCD cameras in the high energy physics system, a scientific grade CCD camera calibration system with high precision and efficiency is designed. The designed camera calibration system consists of a 1053nm nanosecond solid-state laser, a knife, a double-integrating sphere, a laser power meter, a signal generator, a computer with its data processing software. Key technical parameters of scientific grade CCD under the condition of 1053nm optical pulses that are the modulation, contrast, defects, optical dynamic range, non-linear response can be calibrated by the designed calibration system. A double-integrating sphere with high uniformity and stability is designed as a uniform light source, which improves the calibrating performance and accuracy. Experimental results show the system designed in this paper can calibrate the large number of scientific grade CCD cameras quickly and efficiently.
文献类型: Proceedings Paper
会议名称: International Conference on Process Equipment, Mechatronics Engineering and Material Science
会议日期: JUN 15-16, 2013
会议地点: Wuhan, PEOPLES R CHINA
作者关键词: Measuring; High energy physics system; Scientific grade CCD; Precision
Web of Science 类别: Engineering, Electrical & Electronic; Engineering, Mechanical; Materials Science, Multidisciplinary
研究方向: Engineering; Materials Science
IDS 号: BGU14
ISSN: 1660-9336
ISBN: 978-3-03785-726-7
________________________________________
第 56 条，共 77 条
标题: A single-walled carbon nanotube wall paper as an absorber for simultaneously achieving passively mode-locked and Q-switched Yb-doped fiber lasers
作者: Li, XH (Li, Xiaohui); Wang, YG (Wang, Yonggang); Wang, YS (Wang, Yishan); Wang, QJ (Wang, Qijie); Zhao, W (Zhao, Wei); Zhang, YZ (Zhang, Yongzhe); Ya, X (Ya, Xia); Zhang, Y (Zhang, Ying)
书籍团体作者: IEEE
来源出版物: PROCEEDINGS OF THE 2013 IEEE 5TH INTERNATIONAL NANOELECTRONICS CONFERENCE (INEC)  丛书: International Nanoelectronics Conference  页: 139-142  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: We demonstrate a fiber ring laser based on a single-walled carbon nanotube (SWCNT) wall paper absorber. It is found that the proposed Yb-doped fiber laser can either be operated in the mode-locked states or Q-switched states. First, SWCNT wall paper acts as a mode locker when the pump power is below 80 mW. Self-started mode locking can be obtained when the pump power is about 47 mW. The proposed Yb-doped mode-locked fiber lasers can be operated in the dissipative soliton regime that the spectra have a narrow peak. Second, SWCNT wall paper acts as a Q switcher when the pump power is above 80 mW. The Yb-doped fiber laser can work in the Q-switched states at higher pump power which is quite different from the conventional pulse fiber lasers. The repetition rate increases from 30 kHz to 50 kHz and the pulse duration decreases from 2.7 mu s to 1 mu s with the increase of pump power. This is due to the SWCNT wall paper induced loss in the cavity which leads to Q-switched state at higher pump powers. The combination of the Q-switching and mode-locking in one fiber laser have potential application in the fields that require different pulse fiber lasers.
文献类型: Proceedings Paper
会议名称: IEEE 5th International Nanoelectronics Conference (INEC)
会议日期: JAN 02-04, 2013
会议地点: Singapore, SINGAPORE
KeyWords Plus: SATURABLE ABSORBER
Web of Science 类别: Engineering, Electrical & Electronic; Nanoscience & Nanotechnology
研究方向: Engineering; Science & Technology - Other Topics
IDS 号: BFE41
ISSN: 2159-3523
ISBN: 978-1-4673-4841-6
________________________________________
第 57 条，共 77 条
标题: A Research on Navigation Star Catalog Selection Algorithm Based on SVM
作者: Liu, FC (Liu, Fucheng); Liu, ZH (Liu, Zhaohui); Liu, W (Liu, Wen); Liang, DS (Liang, Dongsheng); Cui, K (Cui, Kai); Yuan, H (Yuan, Hui)
编者: Chen R; Sung WP; Kao JCM
来源出版物: MECHATRONICS AND INTELLIGENT MATERIALS III, PTS 1-3  丛书: Advanced Materials Research  卷: 706-708  页: 613-617  DOI: 10.4028/www.scientific.net/AMR.706-708.613  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: A navigation star catalog (NSC) selection algorithm via support vector machine (SVM) is proposed in this paper. The sphere spiral method is utilized to generate the sampling boresight directions by virtue of obtaining the uniform sampling data. Then the theory of regression analysis methods is adopted to extract the NSC,I, and an evenly distributed and small capacity NSC is obtained. Two criterions, namely a global criterion and a local criterion, are defined as the uniformity criteria to test the performance of the NSC generated. Simulations show that, compared with MFM, magnitude weighted method (MWM) and self-organizing algorithm(S-OA), the Boltzmann entropy (B.e) of SVM selection algorithm (SVM-SA) is the minimum, to 0.00207. Simultaneously, under the conditions such as the same field of view (FOV) and elimination of the hole, both the number of guide stars (NGS) and standard deviation (std) of SVM-SA is the least, respectively 7668 and 2.17. Consequently, the SVM-SA is optimal in terms of the NGS and the uniform distribution, and has also a strong adaptability.
文献类型: Proceedings Paper
会议名称: 3rd International Conference on Mechatronics and Intelligent Materials (MIM 2013)
会议日期: MAY 18-19, 2013
会议地点: XiShuangBanNa, PEOPLES R CHINA
作者关键词: guide star catalog; support vector machine; star pattern recognition; Boltzmann entropy
KeyWords Plus: TRACKERS
Web of Science 类别: Engineering, Electrical & Electronic; Engineering, Mechanical; Materials Science, Multidisciplinary
研究方向: Engineering; Materials Science
IDS 号: BGR70
ISSN: 1022-6680
ISBN: 978-3-03785-710-6
________________________________________
第 58 条，共 77 条
标题: Development of streak camera with anisotropic focusing electron optical system
作者: Tian, J (Tian, J.); Ding, Y (Ding, Y.); Cao, X (Cao, X.); Liu, S (Liu, S.); Xu, X (Xu, X.); Hu, X (Hu, X.); Wen, W (Wen, W.); Wang, J (Wang, J.); Wang, C (Wang, C.); Liu, H (Liu, H.); Dong, G (Dong, G.); Zhang, T (Zhang, T.); Lu, Y (Lu, Y.); Wang, X (Wang, X.); Liu, J (Liu, J.)
编者: Kaierle S; Liu J; Cao J
来源出版物: 2ND INTERNATIONAL SYMPOSIUM ON LASER INTERACTION WITH MATTER (LIMIS 2012)  丛书: Proceedings of SPIE  卷: 8796  文献号:   DOI: 10.1117/12.2008988  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: In this paper, the anisotropic focusing technique is used to make a novel streak tube. The salient features are the introduction of both temporally focusing electrodes and spatially focusing electric quadrupole lens. The simulation showed that physical temporal dispersion of 0.38 ps and edge spatial resolution of 56 lp/mm can be achieved. The Nd: YLF 8ps pulse laser was used to calibrate the performance index of streak camera. The static and dynamic spatial resolutions are 35 lp/mm and 25 lp/mm respectively. The dynamic range more than 950: 1 and time resolution 8ps can be reached. Furthermore, the magnifications in slit and scanning direction can be adjusted respectively, so it is very convenient to select amplification needed when it is coupled with KB microscope.
文献类型: Proceedings Paper
会议名称: 2nd International Symposium on Laser Interaction with Matter (LIMIS)
会议日期: SEP 09-12, 2012
会议地点: Xian, PEOPLES R CHINA
作者关键词: streak camera; dynamic range; modulation transfer function; anisotropic focusing
Web of Science 类别: Optics; Physics, Applied
研究方向: Optics; Physics
IDS 号: BGK63
ISSN: 0277-786X
ISBN: 978-0-8194-9639-3
________________________________________
第 59 条，共 77 条
标题: Pulse contrast measurement of femtosecond lasers using chalcohalide glass
作者: Wu, DK (Wu, Dengke); He, JF (He, Junfang); Guo, HT (Guo, Haitao); Zhu, CJ (Zhu, Changjun); Wang, YS (Wang, Yishan); Zhao, W (Zhao, Wei)
编者: Kaierle S; Liu J; Cao J
来源出版物: 2ND INTERNATIONAL SYMPOSIUM ON LASER INTERACTION WITH MATTER (LIMIS 2012)  丛书: Proceedings of SPIE  卷: 8796  文献号:   DOI: 10.1117/12.2011984  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: A chalcogenide glass was used for an optical Kerr gate to sampling pulse contrast of femtosecond lasers with low repetition rate (40 Hz). The dynamic range of this method reached 10(3), with a scanning range of 150ps and temporal sampling rate of 6.3 fs. The advantage of this method lies in its broad spectrum range including visible and NIR spectral region and easy operation.
文献类型: Proceedings Paper
会议名称: 2nd International Symposium on Laser Interaction with Matter (LIMIS)
会议日期: SEP 09-12, 2012
会议地点: Xian, PEOPLES R CHINA
作者关键词: pulse contrast measurement; nonlinear optics; optical Kerr gate; chalcohalide glass
KeyWords Plus: SINGLE-SHOT MEASUREMENT; PICOSECOND LIGHT PULSES; ULTRAVIOLET; AUTOCORRELATOR; SHAPE; FLUORESCENCE; GENERATION; 3RD-ORDER
Web of Science 类别: Optics; Physics, Applied
研究方向: Optics; Physics
IDS 号: BGK63
ISSN: 0277-786X
ISBN: 978-0-8194-9639-3
________________________________________
第 60 条，共 77 条
标题: Proposal on a single-shot correlator for measuring contrast ratio based on optical replication
作者: Yuan, SC (Yuan, Suochao); Gao, LM (Gao, Limin); Zhao, JN (Zhao, Juanning)
编者: Kaierle S; Liu J; Cao J
来源出版物: 2ND INTERNATIONAL SYMPOSIUM ON LASER INTERACTION WITH MATTER (LIMIS 2012)  丛书: Proceedings of SPIE  卷: 8796  文献号:   DOI: 10.1117/12.2006555  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: We propose a new idea to measure the temporal contrast of laser pulses in this paper. Unlike the traditional time-to-space transformation method, the design in this paper can be called a somewhat time-to-time transformation. A single-shot pulse beam is simultaneously divided into two separate beams by a beam splitter. The two beams then enter a pair of optical replicators respectively to generate two pulse sequences that have equal time intervals respectively. The time interval of the two sequences alters by about 100fs that we can use one sequence to scan the other at a time resolution of 100fs through a nonlinear crystal. The time resolution depends on the altering of time interval and the time window depends on the pulse number of the sequence. This method can avoid the spatial modulation of the laser pulse. On the other side, the time resolution and time window are adjustable. It is also possible to measure the high contrast with a low-dynamic-range detector by attenuating the power of each pulse in the sequence respectively.
文献类型: Proceedings Paper
会议名称: 2nd International Symposium on Laser Interaction with Matter (LIMIS)
会议日期: SEP 09-12, 2012
会议地点: Xian, PEOPLES R CHINA
作者关键词: single-shot pulse; pulse replication; temporal contrast measurement
KeyWords Plus: PULSE CONTRAST; LASER
Web of Science 类别: Optics; Physics, Applied
研究方向: Optics; Physics
IDS 号: BGK63
ISSN: 0277-786X
ISBN: 978-0-8194-9639-3
________________________________________
第 61 条，共 77 条
标题: Design and Simulation of Attitude Determination and Control Subsystem of CubeSat Using Extended Kalman Filtering and Linear Quadratic Gain Controller
作者: Han, X (Han, Xiao); Yang, XJ (Yang, Xiaojun); Abbas, NN (Abbas, Naqvi Najam)
编者: Liu XH; Zhang KF; Li MZ
来源出版物: MANUFACTURING PROCESS AND EQUIPMENT, PTS 1-4  丛书: Advanced Materials Research  卷: 694-697  页: 1582-1586  DOI: 10.4028/www.scientific.net/AMR.694-697.1582  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: This paper describes an integral scheme of the design and simulation of the Attitude Determination and Control Subsystem (ADCS) of CubeSat. CubeSat is an educational low-cost, cube-shaped Pico spacecraft. Attitude Determination (AD) is the problem of expressing the orientation of a spacecraft with respect to a given coordinate system. Three axis magneto-resistive digital magnetometer is selected as an attitude sensor. The International Geomagnetic Reference Field (IGRF) is used as reference for magnetometer to obtain attitude information. An enhanced orbit estimate/propagator is implemented to provide position information to IGRF model. Satellite environmental torque is modeled along with satellite kinematics and dynamics. Attitude estimation is done using Extended Kalman Filter (EKF) while the magnetic coils are used as actuators. Attitude Control is applied using Linear Quadratic Regulation (LQR) Controller. The designed ADCS is implemented in Matlab/Simulink.
文献类型: Proceedings Paper
会议名称: 4th International Conference on Manufacturing Science and Engineering (ICMSE 2013)
会议日期: MAR 30-31, 2013
会议地点: Dalian, PEOPLES R CHINA
作者关键词: CubeSat; ADCS; Kalman Filter; LQR control; Matlab/Simulink
Web of Science 类别: Automation & Control Systems; Computer Science, Interdisciplinary Applications; Engineering, Manufacturing; Engineering, Mechanical
研究方向: Automation & Control Systems; Computer Science; Engineering
IDS 号: BGD88
ISSN: 1022-6680
ISBN: 978-3-03785-693-2
________________________________________
第 62 条，共 77 条
标题: Design of Long-wave Infrared Scan System with Rotating Dual-wedge prism
作者: Fan, ZY (Fan, Zheyuan); Gao, LM (Gao, Limin); Yang, HT (Yang, Hongtao); Chen, WN (Chen, Weining); Cao, JZ (Cao, Jianzhong); Zhang, J (Zhang, Jian); Zhang, Z (Zhang, Zhi)
编者: Fu Y
来源出版物: ADVANCES IN OPTICS MANUFACTURE  丛书: Key Engineering Materials  卷: 552  页: 27-32  DOI: 10.4028/www.scientific.net/KEM.552.27  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Due to the possession of advantages of passivity working mode, good disguise, and easy observation, infrared systems are used in a wide variety of applications. This paper using 640x480 uncooled detector designed a long-wave scan optical system with large field and large aperture working at 8.0 mu m similar to 12 mu m, the Pixel Dimensions of the detector is 30 mu m. The F number of this system is 1.4 and focal length is 17mm, FOV is 63.6 degrees, which extended to 143 degrees by adopting dual-wedge prism rotating, the paper also given the extended field theory by the dual-wedge prism. Because there are a limited number of lens materials used in LWER. spectral bands, Germanium material and three aspheric surfaces were adopted to balance sphere aberrations and chromatic aberration. All above mentioned are intending to ensure the system has good imaging quality. The results show that the optical performance approximates to the diffraction limit and the design has better achromatic performance. The modulation transfer function (MTF) is above 0.5 at spatial frequency of 20lp/mm, energy concentration ratio is greater than 70% within the sensing element of the detector and Root Mean Square (RMS) value of spot diameter is smaller than the Pixel Dimensions. The system has advantages of simple structure, large aperture, high image quality etc.
文献类型: Proceedings Paper
会议名称: 3rd Asia Pacific Conference on Optics Manufacture (APCOM 2012)
会议日期: AUG 26-28, 2012
会议地点: Changchun, PEOPLES R CHINA
作者关键词: Optical system design; Dual-wedge prism; LWIR; MTF
Web of Science 类别: Materials Science, Multidisciplinary; Optics
研究方向: Materials Science; Optics
IDS 号: BGA70
ISSN: 1013-9826
________________________________________
第 63 条，共 77 条
标题: Design of a Refractive/Diffractive Hybrid Middle Infrared Continuous Zoom Optical System
作者: Hu, DD (Hu, Dandan); Zhao, JK (Zhao, Jianke); Xue, X (Xue, Xun); Liu, F (Liu, Feng); Zhang, J (Zhang, Jie); Xu, L (Xu, Liang)
编者: Fu Y
来源出版物: ADVANCES IN OPTICS MANUFACTURE  丛书: Key Engineering Materials  卷: 552  页: 33-37  DOI: 10.4028/www.scientific.net/KEM.552.33  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: The application of diffractive surface in the continuous zoom system is investigated by taking advantage of the negative dispersion characteristics of binary elements. A sample design is presented in this paper using cool 320x240 detector with staring focal plane array and secondary imaging, and a mid-wave optical system using mechanical-compensated with refractive/diffractive hybrid technique is designed. The Pixel Dimensions of the detector is 30 mu m, and the wavelength between 3.7 mu m similar to 4.8 mu m. The system adopts negative group variable times and positive group of compensation which can realize 18mm similar to 180mm continuous zoom and FOV =36.8 degrees similar to 3.8 degrees, F-number is 2, it consists of 7 lenses including 2 aspheric surface and 1 diffiactive surface. The length of this system is 230mm with the reflection mirror to shorten optical path. The results show that the modulation transfer function(MTF) is above 0.6 within the whole focal range at spatial frequency of 17 lp/mm, and Root Mean Square (RMS) value of spot diameter were smaller than the Pixel Dimensions. After the image quality being optimized, the monotonic and smooth cam curve is given and 100% cold shield efficiency is obtained. The curve shows that the imaging plane is stable and the cam is easy to process. The system has advantages of simple structure, high image quality and short zoom path etc.
文献类型: Proceedings Paper
会议名称: 3rd Asia Pacific Conference on Optics Manufacture (APCOM 2012)
会议日期: AUG 26-28, 2012
会议地点: Changchun, PEOPLES R CHINA
作者关键词: Optical system design; Diffractive; Continuous zoom; Secondary imaging; Cam curves
KeyWords Plus: ATHERMALIZATION
Web of Science 类别: Materials Science, Multidisciplinary; Optics
研究方向: Materials Science; Optics
IDS 号: BGA70
ISSN: 1013-9826
________________________________________
第 64 条，共 77 条
标题: Target Optimization Design of Cam Curve In Zoom System
作者: Ning, CW (Ning, Chenwei); Zhong, CJ (Zhong, Caojian); Tao, YH (Tao, Yanghong); Jian, Z (Jian, Zhang); Yuan, FZ (Yuan, Fanzhe); Li, W (Li, Wu); Hui, Z (Hui, Zhang); Jie, LY (Jie, Leiyang)
编者: Fu Y
来源出版物: ADVANCES IN OPTICS MANUFACTURE  丛书: Key Engineering Materials  卷: 552  页: 44-51  DOI: 10.4028/www.scientific.net/KEM.552.44  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Zoom lens has been widely applied in all kinds of fields, and its cam optimization is the key to actualizing the performance of its optical design and the zooming process, while the smoothness and speediness of zooming movement must be considered for military and civilian use. With the incremental use of environmental requirements, it puts forward higher requests to the cam performance of lens. In order to guarantee that the cam has good stiffness in the case of vibration and shock environment, in the process of cam design, it not only requires curve optimal, but also needs to consider influence on the performance which is caused by reduced cam stiffness of the zoom system. A fine curve can ensure that the cam pressure angle alpha is smaller, and to ensure the cam follower maintains the uniform velocity and smaller acceleration in zooming process, and make the zoom system produce little impact, and whole zooming process smooth and fluent, it can reduce the zoom systems driving moment M, and can ensure the stability imaging of the zoom system. Good cam stiffness K can make the zoom lens have good stability in vibration environment, and make sure that the image quality. M and K respectively up to the pressure angle alpha of zoom curve and the rotation angle theta of zoom curve in cam. In the new cam design process, considering the whole influence on the performance that is caused by K and Mto cam, we construct the function expressions K = f (alpha, theta) and M=f (alpha, theta), and then, build target optimization function with K and M, optimize the relationship between pressure angle alpha of zoom curve and rotation angle theta, looking for the optimal value for the stiffness K and the cam system driving moment M, and improve overall performance of the zoom cam.
文献类型: Proceedings Paper
会议名称: 3rd Asia Pacific Conference on Optics Manufacture (APCOM 2012)
会议日期: AUG 26-28, 2012
会议地点: Changchun, PEOPLES R CHINA
作者关键词: zoom system; optimization design; cam curve; cam pressure angle; rotation angle
Web of Science 类别: Materials Science, Multidisciplinary; Optics
研究方向: Materials Science; Optics
IDS 号: BGA70
ISSN: 1013-9826
________________________________________
第 65 条，共 77 条
标题: The Design of Optomechanical for Bear Severe Mechanics Environment
作者: Yang, HT (Yang, Hongtao); Fan, ZY (Fan, Zheyuan); Chen, WN (Chen, Weining); Zhang, ZH (Zhang, Zhaohui); Zhang, J (Zhang, Jian); Zhang, Z (Zhang, Zhi)
编者: Fu Y
来源出版物: ADVANCES IN OPTICS MANUFACTURE  丛书: Key Engineering Materials  卷: 552  页: 52-56  DOI: 10.4028/www.scientific.net/KEM.552.52  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Optical lenses act as the important methods for acquire the image information is applied increasingly board,In accordance with the application environment that require content the precision and the force environment adaptation yet more power, so it is necessary that research on the adaption ability to the big level vibration and shock. In order to stand the bitter force environment put to use the centering assembly technology to ensure the image quality of the optical system. Design the different damping coefficient rubber-bearing isolation that assimilate the big level shock energy. At first, by the Pro/e software establish the three-dimensional model and use the ANSYS software simulate and analysis the result of the design. We want to apple the Sigfit software to simulate the effect that the vibration and shock affect on the MTF of the optical system. After optimize the design theory so as to attain the optimized result. By the experiment test the lenses about the accommodate ability, the result which can meet the shock of 5000g and 20g random vibration, camera can work effectively. This kind of design technology is mature and reliable and live through the examination under all kinds of environment, this design method is provided the reference for the design and development of optical mechanism production.
文献类型: Proceedings Paper
会议名称: 3rd Asia Pacific Conference on Optics Manufacture (APCOM 2012)
会议日期: AUG 26-28, 2012
会议地点: Changchun, PEOPLES R CHINA
作者关键词: optomechanical design; mechanics environment; simulate analysis
Web of Science 类别: Materials Science, Multidisciplinary; Optics
研究方向: Materials Science; Optics
IDS 号: BGA70
ISSN: 1013-9826
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第 66 条，共 77 条
标题: Mechanical Passive Compensation for Athermalisation Design of Infrared Optical System
作者: Zhang, Z (Zhang, Zhi); Zhang, ZH (Zhang, Zhaohui); Fan, ZY (Fan, Zheyuan); Yan, A (Yan, Aqi); Zhang, J (Zhang, Jian); Yang, HT (Yang, Hongtao); Cao, JZ (Cao, Jianzhong)
编者: Fu Y
来源出版物: ADVANCES IN OPTICS MANUFACTURE  丛书: Key Engineering Materials  卷: 552  页: 93-96  DOI: 10.4028/www.scientific.net/KEM.552.93  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Optical equipments especially those for aerospace application are expected to work over a wide temperature range. The change of temperature could cause the refractive index change of infrared glass elements. Furthermore, it would lead to the defocus of the image surface and the performance degradation, so the method of temperature compensation must be adopted, which could make sure that optical system would adapt to the change of ambient temperature. A method of temperature compensation with mechanical passive compensation is briefly described, and an example is also given. The quality of image could be optimized through mechanical passive compensation,depending on the differences of metal and non-metallic thermal expansion coefficient. The results show that the optical system works stablely in the designed temperature range. It is of great importance to the athermalisation design of infrared optical system.
文献类型: Proceedings Paper
会议名称: 3rd Asia Pacific Conference on Optics Manufacture (APCOM 2012)
会议日期: AUG 26-28, 2012
会议地点: Changchun, PEOPLES R CHINA
作者关键词: Thermal compensation; Athermalisation design; Thermal expansion coefficient
Web of Science 类别: Materials Science, Multidisciplinary; Optics
研究方向: Materials Science; Optics
IDS 号: BGA70
ISSN: 1013-9826
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第 67 条，共 77 条
标题: Dynamic focus-position detection technique with array camera in long focal length system
作者: Zhao, JN (Zhao, Juanning); Dong, XN (Dong, Xiaona); Da, ZS (Da, Zhengshang); Li, HG (Li, Hongguang)
编者: Fu Y
来源出版物: ADVANCES IN OPTICS MANUFACTURE  丛书: Key Engineering Materials  卷: 552  页: 484-490  DOI: 10.4028/www.scientific.net/KEM.552.484  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: A precise detection technique with array camera is discussed for the detection of dynamic focus position in this paper. This technique is well applicable for measuring the focal spot shifting of large and slow lens or optical systems. Two coated wedges are adopted in light path to supply bands of beams, which form the spots matrix on the detector. Focus position shifting can be indirectly obtained from position shifting of the smallest spot on the detector. The technology discussed here is simple and accurate; it also solves the problem that dynamical focal spot position shifting is immeasurable for conventional focal length measureing methods.
文献类型: Proceedings Paper
会议名称: 3rd Asia Pacific Conference on Optics Manufacture (APCOM 2012)
会议日期: AUG 26-28, 2012
会议地点: Changchun, PEOPLES R CHINA
作者关键词: Dynamic focus-position; Array; Camera; Focal spot energy uniformity
KeyWords Plus: TALBOT INTERFEROMETRY; SHIFTS; BEAMS; LENS
Web of Science 类别: Materials Science, Multidisciplinary; Optics
研究方向: Materials Science; Optics
IDS 号: BGA70
ISSN: 1013-9826
________________________________________
第 68 条，共 77 条
标题: Study on Adaptive Modulation Used in Fading Channels
作者: Wang, X (Wang, Xin); Gao, W (Gao, Wei); Song, ZX (Song, Zongxi)
编者: KIm YH; Yarlagadda P
来源出版物: SENSORS, MEASUREMENT AND INTELLIGENT MATERIALS, PTS 1-4  丛书: Applied Mechanics and Materials  卷: 303-306  页: 2068-2071  DOI: 10.4028/www.scientific.net/AMM.303-306.2068  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Most of traditional modulation and coding techniques do not adapt to fading or nonlinear conditions. These non-adaptive methods require a fix-link margin to maintain acceptable performance when the channel quality is poor. Thus, these systems are effectively designed for the worst-case channel conditions, resulting in insufficient utilization of the full channel capacity. Adapting to signal fading allows the channel to be used more efficiently since the power rate can be adjusted to take advantage of favorable channel conditions. In this paper, we present a simplified mathematical model to calculate the probability of SER for any given constellation of M-QAM. This model plays an important role in designing spectrally efficient adaptive modulation over nonlinear mobile channels. Instantaneous spectral efficiency and its histogram distribution are found for linear and nonlinear channel cases.
文献类型: Proceedings Paper
会议名称: International Conference on Sensors, Measurement and Intelligent Materials (ICSMIM 2012)
会议日期: DEC 26-27, 2012
会议地点: Guilin, PEOPLES R CHINA
作者关键词: Adaptive Modulation; Predistortion Techniques; Fading Channels
KeyWords Plus: SYSTEMS
Web of Science 类别: Materials Science, Multidisciplinary; Remote Sensing
研究方向: Materials Science; Remote Sensing
IDS 号: BFN50
ISSN: 1660-9336
ISBN: 978-3-03785-652-9
________________________________________
第 69 条，共 77 条
标题: An Adaptive Two-point Non-uniformity Correction Algorithm Based on Shutter And Its Implementation
作者: Wang, HW (Wang Huawei); Ma, CW (Ma Caiwen); Cao, JZ (Cao Jianzhong); Zhang, HF (Zhang Haifeng)
书籍团体作者: IEEE
来源出版物: 2013 FIFTH INTERNATIONAL CONFERENCE ON MEASURING TECHNOLOGY AND MECHATRONICS AUTOMATION (ICMTMA 2013)  丛书: International Conference on Measuring Technology and Mechatronics Automation  页: 174-177  DOI: 10.1109/ICMTMA.2013.51  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Because of the non-uniform response of infrared focal plane arrays (IRFPA), non-uniformity correction is a key technology in IRFPA application. The two-point correction algorithm is widely used in practical applications, but there are some disadvantages. The detector's response will drift with time and temperature, correction parameters will drift with this accordingly. In order to acquire good quality images, the correction parameters need to be recalibrated periodically. It is inconvenient for user. This paper proposed an adaptive non-uniformity correction algorithm based on the two-point correction, which can update the correction parameters automatically. And this paper else introduced the approach of the algorithm. Results showed that the algorithm is effective to compensate the response drift influenced by time and temperature.
文献类型: Proceedings Paper
会议名称: 5th International Conference on Measuring Technology and Mechatronics Automation (ICMTMA)
会议日期: JAN 16-17, 2013
会议地点: Hong Kong, PEOPLES R CHINA
作者关键词: IRFPA; adaptive; non-uniformity; Shutter; Correction
Web of Science 类别: Automation & Control Systems; Engineering, Electrical & Electronic; Engineering, Mechanical
研究方向: Automation & Control Systems; Engineering
IDS 号: BFQ56
ISSN: 2157-1473
ISBN: 978-0-7695-4932-3
________________________________________
第 70 条，共 77 条
标题: Ultrafast Laser Machine Based on All-fiber Femtosecond Laser System
作者: Li, DJ (Li, Dongjuan); Cheng, GH (Cheng, Guanghua); Yang, Z (Yang, Zhi); Wang, YS (Wang, Yishan)
编者: Jiang ZY; Liu XH; Jiao SH; Han JT
来源出版物: ADVANCES IN MATERIALS AND MATERIALS PROCESSING, PTS 1-3  丛书: Advanced Materials Research  卷: 652-654  页: 2374-2377  DOI: 10.4028/www.scientific.net/AMR.652-654.2374  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: A femtosecond laser machine consisting of femtosecond fiber laser, trepanning head, linear motor stages system and Siemens 840D system has been integrated for industry application. The femtosecond laser source is all fiber system which contains a fiber mode-lock laser at 1053 nm with a repetition rate of 3.9 MHz, a double-cladding gain fiber amplifiers and a PCF amplifier. An acoustical modulator has employed to tune repetition rate from 3.9 MHz to 100 KHz. An in-line fiber chirped grating is used to stretch the pulse duration to 700 ps. After the PCF amplifier pulse is compressed to sub-ps with 50% efficiency based two grating compressor. The system outputs an average power of 15 W at 100 KHz and 800 fs. Using four wedges trepanning head, cylinder hole is drilled in 1mm thickness SiC ceramics in 30 s.
文献类型: Proceedings Paper
会议名称: 3rd International Conference on Advances in Materials Manufacturing (ICAMMP 2012)
会议日期: DEC 22-23, 2012
会议地点: Beihai, PEOPLES R CHINA
作者关键词: Ultra-short pulse; All-fiber; Laser micromachining; PCF; trepanning head
Web of Science 类别: Engineering, Manufacturing; Materials Science, Multidisciplinary
研究方向: Engineering; Materials Science
IDS 号: BFM18
ISSN: 1022-6680
ISBN: 978-3-03785-620-8
________________________________________
第 71 条，共 77 条
标题: A New Method of Processing High-precision Micro-hole with The Femtosecond Laser
作者: Yang, XJ (Yang, Xiaojun); Li, M (Li, Ming); Wang, L (Wang, Li); Zhao, HL (Zhao, Hualong); Cheng, GH (Cheng, Guagnhua)
编者: Liu H; Yang Y; Shen S; Zhong Z; Zheng L; Feng P
来源出版物: MATERIALS, MECHANICAL ENGINEERING AND MANUFACTURE, PTS 1-3  丛书: Applied Mechanics and Materials  卷: 268-270  页: 382-386  DOI: 10.4028/www.scientific.net/AMM.268-270.382  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Based on the femtosecond laser processing technology and PZT driving scanning technology, high-precision micro- manufacturing technology is developed. By adjusting the laser parameters and scanning parameters to get micro-hole machining on the flat or curved surface. Hole's size and surface morphology is observed by using phase contrast microscopy and scanning electron microscopy observations, and the surface roughness is analyzed by the surface profile instrument. The feasibility of diesel injector nozzle processing is verified in practical industry applications. The results show that this method of making micro hole has significant advantages, such as high precision, good consistency, without burrs, good surface roughness and high efficiency. These characteristics can meet the practical application requirements and can be used in various industrial fields.
文献类型: Proceedings Paper
会议名称: 2nd International Conference on Applied Mechanics, Materials and Manufacturing (ICAMMM 2012)
会议日期: NOV 17-18, 2012
会议地点: Changsha, PEOPLES R CHINA
作者关键词: femtosecond laser; PZT(lead zirconate titanate piezoelectric ceramics); Laser Scanning
Web of Science 类别: Engineering, Manufacturing; Engineering, Mechanical; Materials Science, Multidisciplinary
研究方向: Engineering; Materials Science
IDS 号: BFM19
ISSN: 1660-9336
ISBN: 978-3-03785-579-9
________________________________________
第 72 条，共 77 条
标题: A Study of Femtosecond Laser Machining Technology Applied in Air-Film Holes on Turbine Blades
作者: Zhao, HL (Zhao, Hualong); Zhu, WY (Zhu, Wenyu); Yang, XJ (Yang, Xiaojun); Gao, SF (Gao, Shifang); Zhao, HY (Zhao, Hongyan)
编者: Liu H; Yang Y; Shen S; Zhong Z; Zheng L; Feng P
来源出版物: MATERIALS, MECHANICAL ENGINEERING AND MANUFACTURE, PTS 1-3  丛书: Applied Mechanics and Materials  卷: 268-270  页: 487-491  DOI: 10.4028/www.scientific.net/AMM.268-270.487  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Femtosecond laser with the features of ultrashort pulse duration and ultrahigh peak power can achieve "cold" machining. The recast layer and micro-cracks of the hole wall can be ruduced effectively by applying femtosecond laser in processing air-film holes on turbine blades, and the machining accuracy and consistency of the hole shape will increase. In this paper, the high-speed rotating femtosecond laser beam is adopted in several currently used turbine blade materials for air-film holes machining, and high quality air-film holes without hole wall recast layer and micro-cracks are processed through a large number of experiments to optimize machining technology and technological parameter.
文献类型: Proceedings Paper
会议名称: 2nd International Conference on Applied Mechanics, Materials and Manufacturing (ICAMMM 2012)
会议日期: NOV 17-18, 2012
会议地点: Changsha, PEOPLES R CHINA
作者关键词: femtosecond laser; air-film hole; recast layer; micro-cracks
KeyWords Plus: ABLATION
Web of Science 类别: Engineering, Manufacturing; Engineering, Mechanical; Materials Science, Multidisciplinary
研究方向: Engineering; Materials Science
IDS 号: BFM19
ISSN: 1660-9336
ISBN: 978-3-03785-579-9
________________________________________
第 73 条，共 77 条
标题: Two-Photon Fluorescence Stereomicroscopy with Bessel Beams
作者: Yang, YL (Yang, Yanlong); Lei, M (Lei, Ming); Zheng, JJ (Zheng, Juanjuan); Li, RZ (Li, Runze); Yan, SH (Yan, Shaohui); Yao, BL (Yao, Baoli); Ye, T (Ye, Tong)
编者: Periasamy A; Konig K; So PTC
来源出版物: MULTIPHOTON MICROSCOPY IN THE BIOMEDICAL SCIENCES XIII  丛书: Proceedings of SPIE  卷: 8588  文献号:   DOI: 10.1117/12.2002850  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Three dimensional distributions of cells can be usually acquired by optical sectioning methods, such as multiphoton excitation and confocal fluorescence laser scanning microscopy. Though the lateral scan rates can reach up to several kHz, the relatively slow axial scan comprises the speed of real-time imaging of a volume. Here we propose a three dimensional imaging method that uses Bessel beams as excitation in multiphoton fluorescence microscopy. The extended focus of the Bessel beam allows recording a volume of cells without scanning the depth. The depth information can be retrieved by recording a pair of parallax views of the same volume. We have demonstrated the stereoscope capability on a homebuilt two-photon fluorescence microscope.
文献类型: Proceedings Paper
会议名称: Conference on Multiphoton Microscopy in the Biomedical Sciences XIII
会议日期: FEB 03-05, 2013
会议地点: San Francisco, CA
作者关键词: Parallax microscopy; two photon fluorescence; Bessel beams; extended depth of field
KeyWords Plus: MICROSCOPY; DIFFRACTION; AXICON; FIELD; DEPTH
Web of Science 类别: Engineering, Biomedical; Microscopy; Optics
研究方向: Engineering; Microscopy; Optics
IDS 号: BFH45
ISSN: 0277-786X
ISBN: 978-0-8194-9357-6
________________________________________
第 74 条，共 77 条
标题: Arbitrary Waveform Generator Based on GaAs FET and Tapered Micro-Strip Line
作者: Lin, P (Lin, Ping); Liu, BY (Liu, Baiyu); Gou, YS (Gou, Yongsheng); Bai, YL (Bai, Yonglin); Wang, B (Wang, Bo); Zhao, XQ (Zhao, Xueqing)
编者: Jiang ZY; Liu XH; Jiao SH; Han JT
来源出版物: ENGINEERING SOLUTIONS FOR MANUFACTURING PROCESSES, PTS 1-3  丛书: Advanced Materials Research  卷: 655-657  页: 1581-1586  DOI: 10.4028/www.scientific.net/AMR.655-657.1581  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: In order to improve the output power of laser pulse in the inertia confinement fusion experiment, an arbitrary waveform generator is fabricated to shape the laser pulse. The arbitrary waveform generator is based on the impedance tapered micro-strip line technology and GaAs Field Effect Transistor set which has a good ability of generating voltage-controlled current. With the impedance tapered micro-strip line technology, the arbitrary waveform generator generates shaping electrical pulse with duration less than 10 ns, 330 ps time-domain adjustment. We use the shaping electrical pulse to modulate semiconductor laser which has the characteristic of direct modulate, the experiment results show the shaped laser pulse is obtained based on the shaping electrical pulse.
文献类型: Proceedings Paper
会议名称: 3rd International Conference on Advances in Materials Manufacturing (ICAMMP 2012)
会议日期: DEC 22-23, 2012
会议地点: Beihai, PEOPLES R CHINA
作者关键词: Laser pulse shaping; GaAs FET; On-off characteristic; Impedance tapered micro-strip
Web of Science 类别: Engineering, Mechanical; Materials Science, Multidisciplinary
研究方向: Engineering; Materials Science
IDS 号: BFL62
ISSN: 1022-6680
ISBN: 978-3-03785-648-2
________________________________________
第 75 条，共 77 条
标题: Three-dimensional Structure Trajectory Guiding Scan and Points Cloud Registration
作者: Cai, Y (Cai, Yong)
编者: Wang CK; Guo J
来源出版物: MECHATRONICS AND APPLIED MECHANICS II, PTS 1 AND 2  丛书: Applied Mechanics and Materials  卷: 300-301  页: 423-426  DOI: 10.4028/www.scientific.net/AMM.300-301.423  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Three-dimensional visual scanning is an advanced non-contact measurement approach that can obtain a complete surface model of object. But, in the method, the local raster point cloud sets calculated must be registered to a whole. To reduce fluctuating errors and increase efficiency, we propose a new method that scanner can be moved around object guided by pre-planning trajectory of the robot. First, considering the structural parameters of the robot, the Inverse Kinematics Problem of each joint rotating function is derived, and the moving trajectory is simulated. Then, the relationship between the distances of controlled motion and data gotten by scanner is analyzed, a transform matrix which registered the local point cloud sets is deduced, the raster data can be normalized to the world coordinate by it. The experimental results show that error of registration is less than 0.09mm. The method is suited to measuring different targets in robot workspace. It can improve the efficiency and flexibility of visual measurement system.
文献类型: Proceedings Paper
会议名称: 2nd International Conference on Mechatronics and Applied Mechanics (ICMAM2012)
会议名称: 2nd International Conference on Mechatronics and Applied Mechanics (ICMAM2012)
会议日期: DEC 06-07, 2012
会议日期: DEC 08-09, 2012
会议地点: Hong Kong, PEOPLES R CHINA
会议地点: Taipei, PEOPLES R CHINA
作者关键词: Trajectory scan; Inverse kinematics problem; Three-dimensional point cloud sets registration
Web of Science 类别: Engineering, Mechanical; Materials Science, Multidisciplinary; Mechanics
研究方向: Engineering; Materials Science; Mechanics
IDS 号: BFM85
ISSN: 1660-9336
ISBN: 978-3-03785-651-2
________________________________________
第 76 条，共 77 条
标题: Space High Precision Multi-thermoelectric coolers Controller Design
作者: Du, YF (Du Yunfei); Gao, W (Gao Wei); Luo, MW (Luo Mingwei); Fan, XW (Fan Xuewu)
书籍团体作者: IEEE
来源出版物: 2013 THIRD INTERNATIONAL CONFERENCE ON INTELLIGENT SYSTEM DESIGN AND ENGINEERING APPLICATIONS (ISDEA)  页: 1276-1278  DOI: 10.1109/ISDEA.2012.300  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: With the advancement of high performance charge coupled device (CCD) in aerospace imaging detection, image quality is placed a high value. The importance of an ideal CCD working ambient temperature is realized with the deeply researching of the characters of CCD. A temperature controlling system based on multi- TECs is introduced deriving from the need to prevent thermally induced dark currents from becoming the dominate noise source. -65 degrees C +/- 2 degrees C is the designed value for best function of the CCD used in our project. The principle and work mode of TEC are analyzed. An originally multi-TECs controller design is given for meeting this requirement as well as power and cubage. PWM control and linear control are actualized on two types of TECs according to different application mode. Below 10% current ripple is acquired and the temperature stabilization is below +/- 0.6 degrees C. The ambient temperature is achieved nicely in simulating CCD working cabin experiment stably and efficiently.
文献类型: Proceedings Paper
会议名称: 3rd International Conference on Intelligent System Design and Engineering Applications (ISDEA)
会议日期: JAN 16-18, 2013
会议地点: Hong Kong, PEOPLES R CHINA
作者关键词: charge coupled device (CCD); multi-thermoelectric coolers (Multi-TECs); linear control; Pulse width modulation (PWM) control
Web of Science 类别: Computer Science, Artificial Intelligence; Computer Science, Information Systems
研究方向: Computer Science
IDS 号: BFD73
ISBN: 978-0-7695-4923-1
________________________________________
第 77 条，共 77 条
标题: Sub-pixel Location with Phase Transfer Function for Star Tracker
作者: Xi, JB (Xi, Jiangbo); Song, ZX (Song, Zongxi); Gao, W (Gao, Wei)
编者: Tan J; Wen X
来源出版物: EIGHTH INTERNATIONAL SYMPOSIUM ON PRECISION ENGINEERING MEASUREMENTS AND INSTRUMENTATION  丛书: Proceedings of SPIE  卷: 8759  文献号:   DOI: 10.1117/12.2015091  出版年: 2013 
Web of Science 核心合集中的 "被引频次": 0
被引频次合计: 0
摘要: Star tracker has been widely used as a precise and reliable device for the attitude measuring of a spacecraft. The accuracy of star location will affect the accuracy of star identification and finally the accuracy of attitude measurement. This paper proposed a novel method to locate the star position with the phase transfer function (PTF). The numerical expressions are deduced with the diffraction model of the star point in 1-D and given directly in 2-D. Then calculation is performed and the accuracy is better than 2.1% pixels (SNR=20) with a 3x3 window of airy disk, which is higher than the traditional centroid method. Different sizes of the airy disk from 3 to 6 are simulated with PTF method and we find that the optimal window size is 3 to 5. Finally the Additive Gaussian Noise with SNR from 2 to 40 is introduced to evaluate the novel method and compare it with the traditional centroid method. The accuracy of the new method can reach better than 2.5% pixels and it is much robust than the traditional centroid method, which proves that the method we proposed has a good performance under the noise environment.
文献类型: Proceedings Paper
会议名称: 8th International Symposium on Precision Engineering Measurements and Instrumentation (ISPEMI)
会议日期: AUG 08-11, 2012
会议地点: Chengdu, PEOPLES R CHINA
作者关键词: Star Tracker; Sub-pixel; Diffraction Model; Phase Transfer Function
KeyWords Plus: CENTROID ESTIMATION; SYSTEMATIC-ERROR; ACCURACY; SENSOR
Web of Science 类别: Instruments & Instrumentation; Optics
研究方向: Instruments & Instrumentation; Optics
IDS 号: BFH79
ISSN: 0277-786X
ISBN: 978-0-8194-9550-1