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浏览/检索结果: 共18条，第1-10条 帮助 条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择题名升序题名降序提交时间升序提交时间降序作者升序作者降序发表日期升序发表日期降序 Post Optical Freeform Compensation Technique for Machining Errors of Large-Aperture Primary Mirror 期刊论文  OAI收割 PHOTONICS, 2023, 卷号: 10, 期号: 7 作者:  Huang, Cheng;  Li, Jinpeng;  Cai, Zhaohan;  Yu, Jiadong;  Xie, Yongjun   |  收藏  |  浏览/下载：17/0  |  提交时间：2023/08/18 large-aperture optical system  low-precision primary mirror  freeform compensation  pose compensation  nodal aberration theory   Design of Large Aperture and Large Field of View Receiving Optical System Based on Catadioptric System 会议论文  OAI收割 Virtual, Online, China, 2022-12-18 作者:  Chao, Li;  Yingjun, Ma;  Youhui, Huo;  Weining, Chen   |  收藏  |  浏览/下载：30/0  |  提交时间：2023/03/02 Large Aperture  Large Field of View  Cassegrain System  Optical Design  Imaging Quality   Sub-aperture optical system testing by using of a modified simulateous fit method 会议论文  OAI收割 Shanghai, China, 2020-06-29 作者:  Kewei, E.;  Zhao, Jianke;  Wang, Tao;  Wang, Zhengfeng;  Liu, Kai   |  收藏  |  浏览/下载：33/0  |  提交时间：2021/03/04 wavefront testing  sub-aperture stitching  large aperture optical system  simultaneous fit   Ultra-wide field multispectral integrated spatial optical system design 会议论文  OAI收割 Beijing, China, 2019-07-07 作者:  Ren, Zhi-Guang;  Li, Xu-Yang;  Ni, Dong-Wei   |  收藏  |  浏览/下载：41/0  |  提交时间：2020/03/04 optical design  ultra-wide field  multispectral imaging  large relative aperture  integrative optical system   Yb-doped large-mode-area aluminosilicate laser fibre fabricated by chelate precursor doping technique 期刊论文  OAI收割 electronics letters, 2016, 卷号: 52, 期号: 23, 页码: 1942-u42 作者:  Peng, Kun;  Wang, Zhen;  Zhan, Huan;  Ni, Li;  Gao, Cong 收藏  |  浏览/下载：118/0  |  提交时间：2016/11/22 ytterbium  aluminium compounds  doping  optical fibre fabrication  optical fibre testing  electron probe analysis  secondary ion mass spectroscopy  laser beams  optical fibre amplifiers  AlSiO:Yb  power 1 kW  efficiency 81  0 percent  slope efficiency  laser output  two-stage master oscillator power amplifier system  time-of-flight secondary ion mass spectrometry  electron probe microanalysis  fibre testing  numerical aperture  homogeneous large-core preform  gas flow control system  high-purity materials  chelate precursor doping technique  large mode area aluminosilicate laser fibre   The modular design of large-aperture zoom system 会议论文  OAI收割 international symposium on advanced optical design and manufacturing technologies / international symposium on astronomical telescope and instrumentation, beijing, peoples r china, 2016-05-09 作者:  Liu Kai;  Jiang Kai;  Yan Peipei;  Shan Qiu-sha;  Duan Jing 收藏  |  浏览/下载：28/0  |  提交时间：2017/03/20 Optical design  Large aperture  Zoom system  Modular  Pupil matching   A Novel and Effective Surface Flaw Inspection Instrument for Large-Aperture Optical Elements 期刊论文  OAI收割 IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT, 2015, 卷号: 64, 期号: 9, 页码: 2530-2540 作者:  Tao, Xian;  Zhang, Zhengtao;  Zhang, Feng;  Xu, De 收藏  |  浏览/下载：63/0  |  提交时间：2015/09/23 Bright-field imaging system (BFIS)  dark-field imaging system (DFIS)  flaw inspection  image processing  large-aperture optical element  measurement  path planning   Structural design of primary mirror subassembly for space telescope (EI CONFERENCE) 会议论文  OAI收割 2nd International Conference on Mechatronics and Applied Mechanics, ICMAM 2012, December 8, 2012 - December 9, 2012, Taiwan 作者:  Xu H. 收藏  |  浏览/下载：63/0  |  提交时间：2013/03/25 In order to design a large aperture primary mirror with the diameter of 1150 mm  the parameters impacting on gravity deformation of the mirror were analyzed and discussed in detail  including material selection  diameter-thickness ratio  the number of the support points  location selection and lightweight structure  etc. A novel space mirror structure system was put forward  and its back was opened and supported by six points on back. The dynamic and static and thermal characteristics were analyzed based on the finite element method. Analysis results showed the surface figure accuracy reached to RMS 14.5nm under the action of gravity load along the optical axis direction and the first-order natural frequency was 214Hz which met to the designed indexes requirements. (2013) Trans Tech Publications  Switzerland.   Design of the real-time autofocusing system for collimator with long focus length and large aperture (EI CONFERENCE) 会议论文  OAI收割 2011 International Academic Conference on Numbers, Intelligence, Manufacturing Technology and Machinery Automation, MAMT 2011, December 24, 2011 - December 25, 2011, Wuhan, China 作者:  Zhang X.;  Zhang X.;  Zhang X. 收藏  |  浏览/下载：42/0  |  提交时间：2013/03/25 Large aperture collimator which has been widely used for calibrating and testing various optical devices plays an essential role in correlative laboratories. As being the basic testing and calibration equipment  the large aperture collimator's accuracy should be much higher than the device under testing in order to ensure the accuracy of the measurement. However  the process of adjusting the collimator is extremely complicated due to the collimator's large aperture and long focal length. So it is difficult to ensure the measurement's quality and easy to cause the system being vulnerable to the surrounding environment. One of the most common problems is defocus. In order to solve the problem above  this issue presents a new type of autocollimator autofocusing system which uses pentaprism instead of using large-aperture plane mirror  semiconductor lasers as light source and CCD sensor as receiver. The system is smaller  lighter  and more convenient when using. The computer simulation shows that the autofocusing system's resolution could reach the accuracy of 40m. If we use the relevant algorithms to execute the sub-pixel scanning  the resolution could reach the accuracy of 10m. It shows that the system could satisfy the required testing precision of testing large aperture optical device.   Design of reimaging F/1.0 long-wavelength infrared optical system (EI CONFERENCE) 会议论文  OAI收割 International Symposium on Photoelectronic Detection and Imaging 2011: Advances in Infrared Imaging and Applications, May 24, 2011 - May 24, 2011, Beijing, China 作者:  Zhang X.;  Zhang X.;  Zhang X. 收藏  |  浏览/下载：36/0  |  提交时间：2013/03/25 A reimaging F/1.0 long-wavelength infrared optical system is proposed. The design has a flexible opto-mechanical layout. The design process is as follows. Firstly  the catadioptric reimaging system consists of two reflecting mirrors and a relay lenses. Two reflecting mirrors make up of the first imaging system and are therefore free of chromatic aberrations  while low dispersion lenses were used in the reimaging system  so the optical system do not need achromatic design for a high image quality. Then  to correct high-order aberrations resulting from large relative aperture  more parameters need to be used with aspheric or diffractive surfaces due to modern optic technology development. Here  aspheric is selected for easily manufacture. Finally  the design is completed with the help of ZEMAX software. The effective focal length of the objective is 120mm and the field of view (FOV) is 4. The simulated final design shows adequate image quality and the modulation transfer function (MTF) is close to diffraction limit. The effect of the surrounding environmental temperature is analyzed using the concept of thermal defocusing  and the thermal compensation is discussed. 2011 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE).