第 1 条，共 113 条
标题: Online fabrication scheme of helical long-period fiber grating for liquid-level sensing
作者: Ren, KL (Ren, Kaili); Ren, LY (Ren, Liyong); Liang, J (Liang, Jian); Kong, XD (Kong, Xudong); Ju, HJ (Ju, Haijuan); Xu, YP (Xu, Yiping); Wu, ZX (Wu, Zhaoxin)
来源出版物: APPLIED OPTICS 卷: 55 期: 34 页: 9675-9679 DOI: 10.1364/AO.55.009675 出版年: DEC 1 2016
摘要: We present a novel online fabrication scheme of helical long-period fiber gratings (H-LPFGs) by directly twisting a standard single-mode fiber (SMF) in a microheater. This is done by taking advantage of the inherent core-cladding eccentricity in SMF. We adopt a fiber optic rotary joint to eliminate the accompanying twisting spiral for real-time spectral monitoring and a stepping mechanical system to accurately control the twisting length in fabrication. As a consequence, low-cost and high-quality H-LPFGs can be readily fabricated. Meanwhile, by using this kind of H-LPFG, we design a simple and low-cost wavelength-interrogated liquid-level sensor with a high sensitivity of 0.1 nm/mm. (C) 2016 Optical Society of America
入藏号: WOS:000388938200031
PubMed ID: 27958456
会议名称: Biennial Conference on Applied Optics on Advanced Infrared Technology and Applications (AITA)
会议日期: SEP 29-OCT 02, 2015
会议地点: Pisa, ITALY
作者识别号:
作者        Web of Science ResearcherID        ORCID 号
Ren, Liyong         F-5518-2014         0000-0002-7547-7511
Wu, Zhaoxin         A-5867-2015         0000-0001-8898-0223

ISSN: 1559-128X
eISSN: 2155-3165
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第 2 条，共 113 条
标题: Influence of Driving Frequency on the Argon Dielectric Barrier Discharge Excited by Gaussian Voltage at Atmospheric Pressure
作者: Xu, YG (Xu, Yonggang); Jiang, WM (Jiang, Weiman); Tang, J (Tang, Jie); Zhu, S (Zhu, Sha); Wang, YS (Wang, Yishan); Li, YF (Li, Yongfang); Zhao, W (Zhao, Wei); Duan, YX (Duan, Yixiang)
来源出版物: IEEE TRANSACTIONS ON PLASMA SCIENCE 卷: 44 期: 11 特刊: SI 页: 2553-2563 DOI: 10.1109/TPS.2016.2572733 子辑: 1 出版年: NOV 2016
摘要: A 1-D self-consistent fluid model was employed to investigate the effect of driving frequency on the discharge characters of a dielectric barrier discharge at atmospheric pressure in argon excited by a periodic Gaussian voltage. The simulation results indicate that there are two discharge modes: 1) Townsend and 2) glow modes in the multipulse discharge and different transitions between them during the discharge take place with the increase in driving frequency. When the driving frequency is 1 kHz, there is a tendency of transition from the Townsend mode through glow and finally back to the Townsend one during the positive half-circle of applied Gaussian voltage. However, the discharge in the half-circle can all along operate in the glow mode with the higher driving frequency. Moreover, when the driving frequency is sufficiently high, there are also distinct fluctuations of spatial performance of the charge densities in the positive column during the glow discharge. This is caused by the fact that a lot of charged particles created in the gas gap have not enough time to drift and diffuse to the dielectric barriers, and then these particles are preserved in the local discharge gap at such a high frequency. A comparison of the spatial and temporal evolutions of the electron density at different driving frequencies indicates that the increase in the driving frequency can enhance the plasma chemistry and also expand its volume.
入藏号: WOS:000388793800006
会议名称: 1st Sino-German Symposium on Atmospheric Pressure Gas Discharges and Plasma Applications
会议日期: OCT 11-17, 2015
会议地点: Sino German Sci Ctr, Beijing, PEOPLES R CHINA
会议赞助商: German Res Fdn, Sino german Ctr, Nat Sci Fdn China
会议主办方: Sino German Sci Ctr
ISSN: 0093-3813
eISSN: 1939-9375
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第 3 条，共 113 条
标题: Growth of SiC nanowires by low pressure chemical vapor infiltration using different catalysts
作者: Men, J (Men, Jing); Liu, YS (Liu, Yongsheng); Luo, R (Luo, Rong); Li, WN (Li, Weinan); Cheng, LF (Cheng, Laifei); Zhang, LT (Zhang, Litong)
来源出版物: JOURNAL OF THE EUROPEAN CERAMIC SOCIETY 卷: 36 期: 15 特刊: SI 页: 3615-3625 DOI: 10.1016/j.jeurceramsoc.2016.04.004 出版年: NOV 2016
摘要: SiC nanowires were synthesized by LPCVI using different catalysts, and the influences of input gas ratio (alpha) and catalysts were investigated. The average diameter firstly decreased and then increased with increasing alpha. Under Ni-based catalysis, SiC nanowires were long and thin, and increased with increasing concentration; under Fe-based catalysis, they were short and thick, and the influence of concentration could be neglected. The growth of SiC nanowires was controlled by vapor-liquid-solid (VLS) growth mechanism and the liquid-solid interface between nanowire and metal droplet was the growth plane. At same concentration, the diameter grown under Ni-based catalyst decreased with decreasing diameter of catalyst droplet, while under Fe-based catalyst, the diameters were not affected by catalyst droplet because of the high concentration. SiC nanowires were synthesized in 2D C/SiC composites and could enhance the mechanical properties effectively because of energy consuming from the fracture, pulled up and debond of SiC nanowires. (C) 2016 Elsevier Ltd. All rights reserved.
入藏号: WOS:000381951200009
会议名称: 1st Sino-German Symposium on Preparation and Application of Ultra-High Temperature Ceramic Matrix Composites
会议日期: JUL 26-31, 2015
会议地点: Darmstadt, GERMANY
会议赞助商: Tech Univ Darmstadt, Sino German Ctr Res Promot
ISSN: 0955-2219
eISSN: 1873-619X
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第 4 条，共 113 条
标题: Influence of absorption on stability of terahertz difference frequency generation
作者: Huang, N (Huang, Nan); Liu, HJ (Liu, Hongjun); Sun, QB (Sun, Qibing); Wang, ZL (Wang, Zhaolu); Li, SP (Li, Shaopeng); Han, J (Han, Jing)
来源出版物: APPLIED OPTICS 卷: 55 期: 3 页: 444-448 DOI: 10.1364/AO.55.000444 出版年: JAN 20 2016
摘要: This work presents numerical studies of the stability feature of terahertz difference frequency generation (THz-DFG) with a ZnGeP2 crystal using two pump wavelengths. We found that the maximum output of a THz wave is located in the unstable output region because of the competitive equilibrium between the absorption and the gain. Furthermore, the output stability is dependent on the pump stability. Different from the results at the pump wavelength of 9.588 mu m, there is neither an appropriate stable output region nor gain saturation region at the pump wavelength of 1.064 mu m for a larger absorption coefficient. This work demonstrates that the stable output region of the THz wave is difficult to obtain when the pump absorption is excessively large in DFG. (C) 2016 Optical Society of America
入藏号: WOS:000369055100028
PubMed ID: 26835915
会议名称: OSA Topical Meeting on Digital Holography and 3D Imaging (DH)
会议日期: MAY, 2015
会议地点: Shanghai, PEOPLES R CHINA
作者识别号:
作者        Web of Science ResearcherID        ORCID 号
Liu, Hongjun         D-2541-2016         

ISSN: 1559-128X
eISSN: 2155-3165
________________________________________
第 5 条，共 113 条
标题: Improved Artificial Bee Colony Algorithm with Randomized Halton Sequence
作者: He, ZA (He, Zhen-An); Ma, CW (Ma, Caiwen)
书籍团体作者: IEEE
来源出版物: 2016 2ND IEEE INTERNATIONAL CONFERENCE ON COMPUTER AND COMMUNICATIONS (ICCC) 页: 1270-1273 出版年: 2016
摘要: The artificial bee colony (ABC) algorithm has gained popularity for solutions to many real-world complex problems because of its simplicity and efficiency. However, it is good at exploration but poor at exploitation and early gets trapped into local optimum in some case, which prevents the artificial bee colony algorithm from finding the final result accuracy and efficiently for complex problems. It's known to all that population initialization is an important factor affecting convergence performance of ABC. In this paper, a modified artificial bee colony algorithm with randomized Halton sequence was proposed. A series of experiments were performed on benchmark functions to testify the superiority of our proposed algorithm, and results were compared with other initialization algorithms including opposition-based learning, random initialization and chaotic initialization. The results indicate that our proposed algorithm provides higher solution accuracy and faster convergence speed.
入藏号: WOS:000411576802029
会议名称: 2nd IEEE International Conference on Computer and Communications (ICCC)
会议日期: OCT 14-17, 2016
会议地点: Chengdu, PEOPLES R CHINA
会议赞助商: IEEE
ISBN: 978-1-4673-9026-2
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第 6 条，共 113 条
标题: Ultrafast Interrogation of Fully Distributed Chirped Fibre Bragg Grating Strain Sensor
作者: Ahmad, EJ (Ahmad, Eamonn J.); Wang, C (Wang, Chao); Feng, DJ (Feng, Dejun); Yan, ZJ (Yan, Zhijun); Zhang, L (Zhang, Lin)
书籍团体作者: IEEE
来源出版物: 2016 IEEE PHOTONICS CONFERENCE (IPC) 丛书: IEEE Photonics Conference 页: 482-483 出版年: 2016
摘要: A novel ultrafast and high spatial-resolution interrogation method for fully distributed chirped fibre Bragg grating sensors based on photonic time-stretch frequency-domain reflectometry is presented. Real-time interrogation at measurement speed of 50 MHz with a spatial resolution of 35 mu m was experimentally demonstrated.
入藏号: WOS:000406880100222
会议名称: 29th IEEE Photonics Conference (IPC)
会议日期: OCT 02-06, 2016
会议地点: Waikoloa, HI
会议赞助商: IEEE
ISSN: 2374-0140
ISBN: 978-1-5090-1906-9
________________________________________
第 7 条，共 113 条
标题: Infrared Image Enhancement Based on Multiscale Bilateral Detail Decomposition
作者: Zeng, QJ (Zeng, Qing-jie); Li, J (Li, Jia); Qin, HL (Qin, Han-lin); Leng, HB (Leng, Han-bing); Lv, EL (Lv, En-long); Zhou, HX (Zhou, Hui-xin)
书籍团体作者: Destech Publicat Inc
来源出版物: 2016 INTERNATIONAL CONFERENCE ON ELECTRICAL ENGINEERING AND AUTOMATION (ICEEA 2016) 丛书: DEStech Transactions on Engineering and Technology Research 出版年: 2016
摘要: In order to solve the problem that infrared images usually have a poor visual effect with low contrast and weak details, an infrared image enhancement method based on multiscale bilateral detail decomposition (MBDD) is proposed in this paper. The core of MBDD strategy lies in utilizing bilateral filter with different scale parameters to achieve multiscale detail decomposition for infrared image. On the one hand, abundant detail information in different scales is effectively extracted as detail sub-images to be enhanced; on the other hand, a set of corresponding weights is constructed adaptively. The output image is a fused version from enhanced detail scale sub-images. Experimental results show that the proposed method outperforms other conventional methods for infrared image enhancement.
入藏号: WOS:000406674000046
会议名称: International Conference on Electrical Engineering and Automation (ICEEA)
会议日期: DEC 18-19, 2016
会议地点: Xiamen, PEOPLES R CHINA
ISSN: 2475-885X
ISBN: 978-1-60595-407-3
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第 8 条，共 113 条
标题: Gestalt Principle Based Change Detection and Background Reconstruction
作者: Qiu, S (Qiu, Shi); Dong, YS (Dong, Yongsheng); Lu, XQ (Lu, Xiaoqiang); Du, M (Du, Ming)
编者: Zhang Z; Huang K
来源出版物: INTELLIGENT VISUAL SURVEILLANCE (IVS 2016) 丛书: Communications in Computer and Information Science 卷: 664 页: 20-29 DOI:10.1007/978-981-10-3476-3_3 出版年: 2016
摘要: Gaussian mixture model based detection algorithms can easily lead to fragmentary due to the fixed number of Gaussian components. In this paper, we propose a gestalt principle based change target extraction method, and further present a background reconstruction algorithm. In particular, firstly we applied the Gaussian mixture model to extract the moving target as others did but this may lead to incomplete extraction. Secondly, we have also tried to apply the frame difference method to extract the moving target more precisely. Finally, we determine to build a static background according to relationships between each frame of a moving target. Experiment results reveal that the proposed detection method outperforms the other three representative detection methods. Moreover, our background reconstruction algorithm is also proved to be very effective and robust in reconstructing the backgrounds of a video.
入藏号: WOS:000406993800003
会议名称: 4th Chinese Conference on Intelligent Visual Surveillance (IVS)
会议日期: OCT 19, 2016
会议地点: Beijing, PEOPLES R CHINA
会议赞助商: Chinese Assoc Artificial Intelligence, Tech Comm Comp Vis, China Comp Federat, Springer, Ctr Res Intelligent Percept & Comp, Inst Automat
ISSN: 1865-0929
ISBN: 978-981-10-3476-3; 978-981-10-3475-6
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第 9 条，共 113 条
标题: Real Time H.264 High Definition Videos Encoding based on TMS320DM368 and A Video Quality Evaluation Framework
作者: Hao, FS (Hao Fusheng); Huang, JJ (Huang Jijiang); Liu, W (Liu Wei); Wang, YN (Wang Yanan); Yang, HT (Yang Hongtao); Cao, JZ (Cao Jianzhong)
编者: Xu B
来源出版物: PROCEEDINGS OF 2016 IEEE ADVANCED INFORMATION MANAGEMENT, COMMUNICATES, ELECTRONIC AND AUTOMATION CONTROL CONFERENCE (IMCEC 2016) 页: 128-132 出版年: 2016
摘要: This pa per presents a framework for evaluating quality of video encoding algorithms. This technique works by collecting source videos, encoding the source videos with a given algorithm, and decoding the compressed sequences. The decoded video shall be measured with the original sources in a specific evaluation method and feedback to the algorithm. Under the guidance of this framework, an implementation based on embedded device is achieved. Firstly, we collect test source videos in two ways: the commonly used standard sequences and actual scenes captured by camera. Secondly, a popular video encoding standard, H.264, is realized on TMS320DM368, a digital media system-on-chip produced by TEXAS INSTRUMENTS (TI). Finally, peak signal-to-noise ratio (PSNR) is implemented and computed among different test sequences. In the experiments, we achieve the real time compression of high definition videos with an acceptable PSNR The video quality framework also can be easily extended to other encoding algorithms.
入藏号: WOS:000405512400026
会议名称: IEEE Advanced Information Management, Communicates, Electronic and Automation Control Conference (IMCEC)
会议日期: OCT 03-05, 2016
会议地点: Xian, PEOPLES R CHINA
会议赞助商: IEEE, IEEE Beijing Sect, Global Union Acad Sci & Technol, Chongqing Global Union Acad Sci & Technol, Xian Peihua Univ
ISBN: 978-1-4673-9613-4
________________________________________
第 10 条，共 113 条
标题: Spectrum reconstruction for Chang'e-1 imaging interferometer data using modified periodogram method
作者: Zhu, F (Zhu, Feng); Liu, JH (Liu, Jia-Hang); Ren, X (Ren, Xin); Chen, TQ (Chen, Tie-Qiao); Liu, J (Liu, Jia)
编者: Yang T; Fakharian A
来源出版物: PROCEEDINGS OF THE 2ND ANNUAL INTERNATIONAL CONFERENCE ON ELECTRONICS, ELECTRICAL ENGINEERING AND INFORMATION SCIENCE (EEEIS 2016) 丛书: AER-Advances in Engineering Research 卷: 117 页: 94-101 出版年: 2016
摘要: Imaging Interferometer (IIM) aboard on Chang'e-1 is a Fourier transform imaging spectroscopy. Spectrum reconstruction which converts raw interferometric data to spectral data is crucial to the signal-to-noise (SNR) property and spectral consistency, thus influences the usability of IIM data. Three modified periodogram method including periodogram with rectangular window (PRW), periodogram with triangular window (PTW) and Bartlett method are introduced for the spectrum reconstruction. We use the Spectral and Spatial Decorrelation method to calculate the SNRs, and use Apollo samples to calibrate the spectrum and validate the spectral consistency of the three methods. Experimental results showed that Bartlett method had better performance in both SNR and spectral consistency than other two methods.
入藏号: WOS:000400862900012
会议名称: 2nd Annual International Conference on Electronics, Electrical Engineering and Information Science (EEEIS)
会议日期: DEC 02-04, 2016
会议地点: Xian, PEOPLES R CHINA
ISSN: 2352-5401
ISBN: 978-94-6252-320-3
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第 11 条，共 113 条
标题: Nanostructures on Metallic Glass Surfaces Irradiated by Femtosecond Laser
作者: Cheng, GH (Cheng, Guanghua); Zhang, W (Zhang, Wei); Li, C (Li, Chen); Zhang, H (Zhang, Hao); Stoian, R (Stoian, Razvan)
书籍团体作者: IEEE
来源出版物: 2016 PROGRESS IN ELECTROMAGNETICS RESEARCH SYMPOSIUM (PIERS) 页: 2432-2432 出版年: 2016
入藏号: WOS:000400013902089
会议名称: Progress in Electromagnetic Research Symposium (PIERS)
会议日期: AUG 08-11, 2016
会议地点: Shanghai, PEOPLES R CHINA
会议赞助商: Electromagnet Acad, Tongji Univ, Tongji Univ, Depat Elect Sci & Technol, Nanjing Univ Sci & Technol, Shanghai Key Lab Electromagnet Environm Effects Aerosp Vehicle, Sci & Technol Electromagneti Scattering Lab, Univi Tunku Abdul Rahman, Dev & Res Acad Global Opt Neo Technol, Zhejiang Univ, Coll Informat Sci & Elect Engn, IEEE Geoscience & Remote Sensing Soc, Zhejiang Univ, Electromagnet Acad
ISBN: 978-1-5090-6093-1
________________________________________
第 12 条，共 113 条
标题: 45 degrees Tilted Fiber Grating Based in-fiber Linear Polarizer and Applications
作者: Yan, ZJ (Yan, Zhijun); Wang, HS (Wang, Hushan); Zhou, KM (Zhou, Kaiming); Mou, CB (Mou, Chengbo); Li, JF (Li, Jianfeng); Zhang, ZX (Zhang, Zuxing); Zhang, L (Zhang, Lin); Wang, YS (Wang, Yishan); Zhao, W (Zhao, Wei)
书籍团体作者: IEEE
来源出版物: 2016 PROGRESS IN ELECTROMAGNETICS RESEARCH SYMPOSIUM (PIERS) 页: 3166-3166 出版年: 2016
入藏号: WOS:000400013902323
会议名称: Progress in Electromagnetic Research Symposium (PIERS)
会议日期: AUG 08-11, 2016
会议地点: Shanghai, PEOPLES R CHINA
会议赞助商: Electromagnet Acad, Tongji Univ, Tongji Univ, Depat Elect Sci & Technol, Nanjing Univ Sci & Technol, Shanghai Key Lab Electromagnet Environm Effects Aerosp Vehicle, Sci & Technol Electromagneti Scattering Lab, Univi Tunku Abdul Rahman, Dev & Res Acad Global Opt Neo Technol, Zhejiang Univ, Coll Informat Sci & Elect Engn, IEEE Geoscience & Remote Sensing Soc, Zhejiang Univ, Electromagnet Acad
作者识别号:
作者        Web of Science ResearcherID        ORCID 号
Mou, Chengbo         Y-8501-2019         0000-0001-6107-3439

ISBN: 978-1-5090-6093-1
________________________________________
第 13 条，共 113 条
标题: Optical System Design of Subminiature Endoscope with Imaging Fiber Bundle
作者: Lv, J (Lv Juan); Xue, B (Xue Bin); Li, T (Li Ting); He, YH (He Ying-hong); Ma, XL (Ma Xiao-long); Yan, XT (Yan Xing-tao)
编者: Lu B; Wang H
来源出版物: ADVANCED LASER MANUFACTURING TECHNOLOGY 丛书: Proceedings of SPIE 卷: 10153 文献号: UNSP 101530L DOI: 10.1117/12.2246134 出版年: 2016
摘要: A new subminiature endoscope which used for reconnaissance and diagnosis has been designed. This subminiature endoscope is designed based on imaging fiber bundle and consist of the front object lens whose aperture is only 0.5mm, imaging fiber bundle and the post coupling lens. It realized by using subminiature optical systems. The FOV(field of view) and the focal length of the front object lens are 50 degrees and 0.59mm. And the object distance, F number and detected imaging high of the front object lens are 3mm, 6 and 0.5mm. The total number of the imaging fiber bundle are 10000 and it's pixel cell size is 5 mu m. The effective aperture of the imaging fiber bundle is 0.46mm. The post coupling lens has a reduction ratio of 1.73. It's object distance and imaging height are 5mm and 0.8mm. The Numerical Aperture (NA) of the front object lens, imaging fiber bundle and the post coupling lens are matching will. The coupling efficiency of the imaging fiber bundle is above 93% and the system's design result can meet the need of the limit resolution of the imaging fiber. This kind of the fiber endoscope has the peculiarity of wide FOV, fine imaging quality, compact configuration, low finished cost and etc. It is meaningful to realize the objective of miniaturization, batch-type production and high imaging quality of the endoscope.
入藏号: WOS:000389274700021
会议名称: Conference on Advanced Laser Manufacturing Technology
会议日期: MAY 09-11, 2016
会议地点: Beijing, PEOPLES R CHINA
会议赞助商: Chinese Soc Opt Engn, Chinese Soc Astronaut, Photoelectron Technol Comm, China High Ttech Industrializat Assoc, Photo Elect Industrializat Comm, SPIE, China High Ttech Industrializat Assoc, Dept Cooperat & Coordinat Ind Acad & Res
ISSN: 0277-786X
ISBN: 978-1-5106-0765-1
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第 14 条，共 113 条
标题: Design of a mid-wavelength infrared dual field of view zoom system
作者: Duan, J (Duan Jing); Li, G (Li Gang); Jiang, K (Jiang Kai); Liu, K (Liu Kai); Yan, PP (Yan Peipei); Shan, QS (Shan Qiusha)
编者: Xu M; Yang J
来源出版物: ADVANCED OPTICAL DESIGN AND MANUFACTURING TECHNOLOGY AND ASTRONOMICAL TELESCOPES AND INSTRUMENTATION 丛书:Proceedings of SPIE 卷: 10154 文献号: UNSP 1015416 DOI: 10.1117/12.2246694 出版年: 2016
摘要: In order to effectively improve the target detection and recognition ability of IR imagers, based on a 320x256 cooled staring focal plane array(FPA) detector, pixel size 30 mu mx30 mu m, a mid-wavelength infrared dual field of view zoom system was designed. In this paper, the working wavelength is 3 mu m similar to 5 mu m, the temperature range is -40 degrees C similar to+50 degrees C, this system can realize 200mm and 400mm dual focal length, the F-number is 2, the full field of view of short focal length is 3.44 degrees and long focal length is 1.72 degrees respectively, satisfy 100% cold shield efficiency. A re-imaging refractive system was adopted in this designed optical system consists of main optics and projection components. First of all, the structural selection and the initial parameter calculation were introduced in detail. Secondly, on the basis of variety of the distance and temperature, a focusing len was presented in this system to adjust to produce a clear image. Last but not the least, to improve image quality and environment adaptability, the analysis of temperature change and narcissus effect were described particularly. The design results prove that at the spatial frequency of 17 lp/mm, the MTF of the optical system is greater than 0.5(the axis MTF of the optical is greater than 0.6), the system can offer a high resolution and excellent images in whole range of the focal length, and it has the advantages of good adaptability, compact structure, high optical transmission and small size.
入藏号: WOS:000391500900043
会议名称: International Symposium on Advanced Optical Design and Manufacturing Technologies / International Symposium on Astronomical Telescope and Instrumentation
会议日期: MAY 09-11, 2016
会议地点: Beijing, PEOPLES R CHINA
会议赞助商: Chinese Soc Opt Engn, Chinese Soc Astronaut, Photoelectron Technol Comm, China High Tech Industrializat Assoc, Photo Elect Industrializat Comm, China High Tech Industrializat Assoc, Dept Cooperat & Coordinat Ind, Acad & Res
ISSN: 0277-786X
ISBN: 978-1-5106-0767-5
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第 15 条，共 113 条
标题: Development and Alignment for SiC Mirror Subsystem of a space-borne telescope
作者: Feng, LJ (Feng Liang-jie); Wang, W (Wang Wei); Ren, GR (Ren Gruo-rui)
编者: Xu M; Yang J
来源出版物: ADVANCED OPTICAL DESIGN AND MANUFACTURING TECHNOLOGY AND ASTRONOMICAL TELESCOPES AND INSTRUMENTATION 丛书:Proceedings of SPIE 卷: 10154 文献号: UNSP 1015425 DOI: 10.1117/12.2247416 出版年: 2016
摘要: A Phi 600mm SiC primary mirror subsystem of a space-borne Ritchey-Chretien telescope was designed. The open-back primary mirror was made of pressure-less sintering silicon carbide ( SiC), light-weighted at a ratio of approximately 70%. Minimizing the optical surface astigmatism was critical for the mirror, the astigmatism is caused mainly by gravity effects, temperature variation and the bonding process. Three invar flexure bipods were fixed on the baseplate of the telescope at first, and the posture of the primary mirror was adjusted precisely for 0.2mm gap to the bipods. 3M 2216 B/A grey adhesive was then injected into the gap between the mirror and bipod flexure, the curing process was last 72 hours in the room temperature. So the mirror was affected only by curing stress of the adhesive during the assembly process. Structural strength and dynamic stiffness of the mirror subsystem in the thermal-structural coupling state were analyzed with finite element method. Analyzed results show that the optical surface distortion is less than 1/50 lambda at 632.8nm RMS with three points support and less than 1/200 lambda RMS with 2 degrees C temperature variation because of the flexure support and compatible support and mirror material, The optical performance test with interferometer show that the optical surface distortion caused by the curing stress of the adhesive is less than 1/50 lambda RMS, the overall optical surface of the primary mirror is less than 1/30 lambda rms, which met the critical requirements for the primary mirror of the telescope.
入藏号: WOS:000391500900078
会议名称: International Symposium on Advanced Optical Design and Manufacturing Technologies / International Symposium on Astronomical Telescope and Instrumentation
会议日期: MAY 09-11, 2016
会议地点: Beijing, PEOPLES R CHINA
会议赞助商: Chinese Soc Opt Engn, Chinese Soc Astronaut, Photoelectron Technol Comm, China High Tech Industrializat Assoc, Photo Elect Industrializat Comm, China High Tech Industrializat Assoc, Dept Cooperat & Coordinat Ind, Acad & Res
ISSN: 0277-786X
ISBN: 978-1-5106-0767-5
________________________________________
第 16 条，共 113 条
标题: Resolution allocation and budget of the Lyman-alpha ultraviolet telescope
作者: Jiang, K (Jiang Kai); Jiang, B (Jiang Bo); Liu, K (Liu Kai); Yan, PP (Yan Peipei); Duan, J (Duan Jing); Shan, QS (Shan Qiusha)
编者: Xu M; Yang J
来源出版物: ADVANCED OPTICAL DESIGN AND MANUFACTURING TECHNOLOGY AND ASTRONOMICAL TELESCOPES AND INSTRUMENTATION 丛书:Proceedings of SPIE 卷: 10154 文献号: UNSP 101541C DOI: 10.1117/12.2246786 出版年: 2016
摘要: As a high-resolution imaging instrument, angular resolution is the most important index of Lyman-a ultraviolet telescope. In this paper a new allocation and budget method is introduced. An resolution error allocation of surface roughness. figure error and alignment error was developed early in the program. And the allocation was used to guide the design. Though testing the surface roughness and figure error in visible light, the variation of diffraction encircled energy can be obtained by non-sequence model and Zernike coefficients brought into optical design software. The numerical results show that the effective RMS surface roughness of primary and secondary mirrors are 0.49nm and 0.40nm in the spatial frequency from 1/D (D is the diameter of the mirror) to 1/lambda (lambda is an incident wavelength). And the effects of the surface roughness are both less than 0.1 ''. The figure error of the primary and secondary mirrors are 0.009. and 0.007. (lambda=632.8nm). The resolution errors which were brought by the figure error are 0.33 '' and 0.16 ''. Then the effect of alignment error on angular resolution was gotten by testing visual resolution. Finally the angular resolution in ultraviolet band can be calculated. The focal length of Lyman-alpha ultraviolet telescope is 2000mm and the pixel size of detector is 14 mu m. So the pixel resolution is 1.4 ''. Experimental results show that the angular resolution of Lyman-alpha ultraviolet telescope is 0.59 '', which is approached to the estimate and meet the requirement.
入藏号: WOS:000391500900049
会议名称: International Symposium on Advanced Optical Design and Manufacturing Technologies / International Symposium on Astronomical Telescope and Instrumentation
会议日期: MAY 09-11, 2016
会议地点: Beijing, PEOPLES R CHINA
会议赞助商: Chinese Soc Opt Engn, Chinese Soc Astronaut, Photoelectron Technol Comm, China High Tech Industrializat Assoc, Photo Elect Industrializat Comm, China High Tech Industrializat Assoc, Dept Cooperat & Coordinat Ind, Acad & Res
ISSN: 0277-786X
ISBN: 978-1-5106-0767-5
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第 17 条，共 113 条
标题: Design and Research of Moving Objects Dimension Measurement System Based on Linear Array CCD
作者: Lei, FP (Lei, Fanpu); Bai, YL (Bai, Yonglin); Zhu, BL (Zhu, Bingli)
编者: Xu M; Yang J
来源出版物: ADVANCED OPTICAL DESIGN AND MANUFACTURING TECHNOLOGY AND ASTRONOMICAL TELESCOPES AND INSTRUMENTATION 丛书:Proceedings of SPIE 卷: 10154 文献号: UNSP 101540R DOI: 10.1117/12.2246493 出版年: 2016
摘要: A novel moving objects dimension measurement system based on the linear array CCD is designed. The light source is a pulsed laser with pulse width 200ns. Single point of light passes through lens converted to parallel light which will illuminate to the CCD through the moving object to be tested. CCD pixels which are blocked by the object while light is on are low, and the remaining pixels are high conversely. The distance of the tested objects while light is on can be ignored since the light pulse width is much smaller than the integration time of CCD (10ms generally). The size of the tested object can be achieved by the number of dark pixels of CCD while light is on. This paper introduces the principle and composition of the dimension measurement system. The results show that this system can measure the size of moving objects and measuring accuracy is better than 50 microns. Accuracy and stability of the system can achieve actual production requirements when the object's moving speed is smaller than 50mm/s. Optimizing the parallelism of the parallel light, the measurement accuracy can be further improved.
入藏号: WOS:000391500900028
会议名称: International Symposium on Advanced Optical Design and Manufacturing Technologies / International Symposium on Astronomical Telescope and Instrumentation
会议日期: MAY 09-11, 2016
会议地点: Beijing, PEOPLES R CHINA
会议赞助商: Chinese Soc Opt Engn, Chinese Soc Astronaut, Photoelectron Technol Comm, China High Tech Industrializat Assoc, Photo Elect Industrializat Comm, China High Tech Industrializat Assoc, Dept Cooperat & Coordinat Ind, Acad & Res
ISSN: 0277-786X
eISSN: 1996-756X
ISBN: 978-1-5106-0767-5
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第 18 条，共 113 条
标题: The modular design of large-aperture zoom system
作者: Liu, K (Liu Kai); Jiang, K (Jiang Kai); Yan, PP (Yan Peipei); Shan, QS (Shan Qiu-sha); Duan, J (Duan Jing); Li, G (Li Gang)
编者: Xu M; Yang J
来源出版物: ADVANCED OPTICAL DESIGN AND MANUFACTURING TECHNOLOGY AND ASTRONOMICAL TELESCOPES AND INSTRUMENTATION 丛书:Proceedings of SPIE 卷: 10154 文献号: UNSP 101540A DOI: 10.1117/12.2244007 出版年: 2016
摘要: According to the large aperture, long focal length zoom system design, the structure of the optical system based on the modular concept is proposed. The structure is constituted of an afocal compression telescope and a zoom system. The parts of each other are individually designed. The aberrations of them are independently. Because of this, the alignment of the system and the difficulty of test are greatly reduced. It is easily replaced by changing the zoom system parts, which can achieve other different focal length and ratio. Using afocal compression telescope greatly reduces the radial aperture of the zoom group, simplifies the system structure and reduces the cost. Meanwhile, the variable stop is placed in the vicinity of the primary mirror. It is instead of the zoom system used in floating variable stop. In addition, the problem about large aperture zoom system pupil matching is solved perfectly. In this article, four methods of pupil matching are given and the advantages and disadvantages of them are analyzed. Using this optical structure, a zoom system is designed, which is working in the visible wavelength band with variable focal length between 900mm and 4500mm, 500mm maximum aperture. The axial dimension of the system is less than 650mm. The maximum diameter of zoom system parts is less than 40 mm. Moreover, the distances of the zoom group and compensating group are all less than 60 mm. Besides, the motion curves of each other are given in the article. The Modulation Transfer Function (MTF) values of the system are greater than 0.3 at 48lp/mm across different focal length and field pointing on the axis. The design results show that the imaging quality is excellent, the structure is compact, and the alignment and test are easy. The imaging requirements of zoom system are all satisfied.
入藏号: WOS:000391500900011
会议名称: International Symposium on Advanced Optical Design and Manufacturing Technologies / International Symposium on Astronomical Telescope and Instrumentation
会议日期: MAY 09-11, 2016
会议地点: Beijing, PEOPLES R CHINA
会议赞助商: Chinese Soc Opt Engn, Chinese Soc Astronaut, Photoelectron Technol Comm, China High Tech Industrializat Assoc, Photo Elect Industrializat Comm, China High Tech Industrializat Assoc, Dept Cooperat & Coordinat Ind, Acad & Res
ISSN: 0277-786X
ISBN: 978-1-5106-0767-5
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第 19 条，共 113 条
标题: Multi-Channel Photonic Crystal Filters with Superposed Structure
作者: Qian, S (Qian, Shi); Lei, Z (Lei, Zhang)
编者: Xu M; Yang J
来源出版物: ADVANCED OPTICAL DESIGN AND MANUFACTURING TECHNOLOGY AND ASTRONOMICAL TELESCOPES AND INSTRUMENTATION 丛书:Proceedings of SPIE 卷: 10154 文献号: UNSP 1015427 DOI: 10.1117/12.2247445 出版年: 2016
摘要: In this paper, photonic crystal -based filters are proposed. It is different from the narrow band filter with regular channels that Farbry-Perot interference filter and short wave-pass filters are overlapped to the multi-channel photonic crystal filters. The multi-channel photonic crystal filters have two bands in 428nm-449nm of blue light and 535nm-590nm of green light, the average transmittance is over 90%, which are able to meet the requirements of the projection optics. The brightness and color purity of the system are both improved.
入藏号: WOS:000391500900080
会议名称: International Symposium on Advanced Optical Design and Manufacturing Technologies / International Symposium on Astronomical Telescope and Instrumentation
会议日期: MAY 09-11, 2016
会议地点: Beijing, PEOPLES R CHINA
会议赞助商: Chinese Soc Opt Engn, Chinese Soc Astronaut, Photoelectron Technol Comm, China High Tech Industrializat Assoc, Photo Elect Industrializat Comm, China High Tech Industrializat Assoc, Dept Cooperat & Coordinat Ind, Acad & Res
ISSN: 0277-786X
ISBN: 978-1-5106-0767-5
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第 20 条，共 113 条
标题: Applications of photonic crystal in wavelength multiplex visualization
作者: Qian, S (Qian, Shi); Lei, Z (Lei, Zhang)
编者: Xu M; Yang J
来源出版物: ADVANCED OPTICAL DESIGN AND MANUFACTURING TECHNOLOGY AND ASTRONOMICAL TELESCOPES AND INSTRUMENTATION 丛书:Proceedings of SPIE 卷: 10154 文献号: UNSP 101541V DOI: 10.1117/12.2247307 出版年: 2016
摘要: The triple-channel photonic crystal filters are proposed designed. These devices have advantages of better filtering effect and high wavelength accuracy. In wavelength multiplex visualization, these filters can bring different wavelength of view entering into eyes so that stereo images are formed. we discuss the problem about minimization of the angle shift. The simulation shows that higher-index material and more high-index material in a basic period can decrease the angle shift.
入藏号: WOS:000391500900068
会议名称: International Symposium on Advanced Optical Design and Manufacturing Technologies / International Symposium on Astronomical Telescope and Instrumentation
会议日期: MAY 09-11, 2016
会议地点: Beijing, PEOPLES R CHINA
会议赞助商: Chinese Soc Opt Engn, Chinese Soc Astronaut, Photoelectron Technol Comm, China High Tech Industrializat Assoc, Photo Elect Industrializat Comm, China High Tech Industrializat Assoc, Dept Cooperat & Coordinat Ind, Acad & Res
ISSN: 0277-786X
ISBN: 978-1-5106-0767-5