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Design of a six-axis force sensor with large range and high sensitivity 期刊论文  OAI收割
Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument, 2019, 卷号: 40, 期号: 9, 页码: 61-69
作者:  
K.Han;  L.Chen;  H.Li;  M.Xia;  Q.Wu
  |  收藏  |  浏览/下载:30/0  |  提交时间:2020/08/24
Structural design of 3m class ground based telescope elevation ring 期刊论文  OAI收割
Proceedings of SPIE: 8th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, 2016, 卷号: 9682, 页码: 96820R
作者:  
Tan, Yufeng;  Wang, Jihong;  Ren, Ge;  Xie, Zongliang;  Zhu, Fuyin
  |  收藏  |  浏览/下载:38/0  |  提交时间:2018/06/14
Study on the support technology of the light-weighted mirror 期刊论文  OAI收割
Proceedings of SPIE: 8th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, 2016, 卷号: 9682, 页码: 96820X
作者:  
Zhu, Nengbing;  Qi, Bo;  Ren, Ge;  Zhu, Fuyin;  Ai, Zhiwei
  |  收藏  |  浏览/下载:43/0  |  提交时间:2018/06/14
Study on ultra-light secondary baffle for coaxial two-mirror telescope (EI CONFERENCE) 会议论文  OAI收割
2012 9th IEEE International Conference on Mechatronics and Automation, ICMA 2012, August 5, 2012 - August 8, 2012, Chengdu, China
作者:  
Zhang L.;  Zhang L.
收藏  |  浏览/下载:86/0  |  提交时间:2013/03/25
The coaxial two-mirror telescope consists of two mirrors facing each other. Classical two-mirror arrangements are Gregorian and Cassegrain. These systems are usually applied to space telescopes and often have optical baffles to prevent stray light from entering the focal plane. The optical baffles consist of concentric rings suspended between the secondary and the primary mirror. The secondary baffle for a large two-mirror optical system is designed and analyzed in this paper. According to mission of a telescope  the structure should have high stiffness and high reliability and light weight. Compared with invar  aluminum alloy and titanium alloy  carbon fiber composite is currently the best material in terms of weight-to-strength ratio. It also has advantages of high temperature tolerance and low thermal expansion. So carbon fiber composite is chosen as material to meet requirements of the coaxial telescope. In this paper  optimization method based on finite element analysis (FEA) is used for design the secondary baffle. Minimum weight of the baffle is chosen as an objective function. Thicknesses of former tube and vanes are chosen as variables. Analysis results show that the designed secondary baffle has maximum diameter of 180mm  total length of 120mm and weighs 142g. And its fundamental frequency reaches 651Hz. Therefore the baffle has many advantages  such as ultra-light weight  high stiffness and dimensional stability  etc. The optimization method and the baffle design can be helpful to other coaxial telescopes  such as Cassegrain  Gregorian and their subdivisions. 2012 IEEE.  
Manufacturing and Testing SiC Aspherical mirrors in Space telescopes (EI CONFERENCE) 会议论文  OAI收割
ICO20: Optical Devices and Instruments, August 21, 2005 - August 26, 2005, Changchun, China
作者:  
Fan D.;  Zhang X.;  Zhang X.;  Zhang X.
收藏  |  浏览/下载:31/0  |  提交时间:2013/03/25
Reaction Bonded (RB) SiC mirrors due to their excellent specific stiffness and thermal properties have been widely used in space telescopes. However  polishing large SiC aspherical mirrors is difficult compared to other materials such as fused silica or Zerodu. In addition  surface roughness of the polished SiC mirrors is limited by the defects of the materials and needs to be improved by means of surface coating technique. This paper introduces the current progress of large SiC aspherical mirrors manufacturing and testing in CIOMP. In particular  the procedures of making large off-axis aspherical mirrors were discussed in detail. A proprietary computer controlled optical surfacing (CCOS) technique was utilized to grind and polish the mirrors and the computer aided null test was used to measure the surface figure. As results  a 600mm class off-axis SiC aspherical mirrors was demonstrated with figure error less than 13nm rms.