Volume 8 Issue 2
Apr.  2015
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YU Lin-yao, WEI Qun, ZHANG Tian-yi, WANG Chao, HAN Jing-Zhuang, ZHU Rui-fei, SONG Bao-qi, JIA Hong-guang. Design of long focal infrared catadioptric optical system for multi-guided system[J]. Chinese Optics, 2015, 8(2): 234-240. doi: 10.3788/CO.20150802.0234
Citation: YU Lin-yao, WEI Qun, ZHANG Tian-yi, WANG Chao, HAN Jing-Zhuang, ZHU Rui-fei, SONG Bao-qi, JIA Hong-guang. Design of long focal infrared catadioptric optical system for multi-guided system[J]. Chinese Optics, 2015, 8(2): 234-240. doi: 10.3788/CO.20150802.0234

Design of long focal infrared catadioptric optical system for multi-guided system

  • Received Date: 17 Oct 2014
  • Accepted Date: 15 Jan 2015
  • Publish Date: 25 Apr 2015
  • In order to meet the requirement of compact structure and athermal stability with wide temperature range, a middle infrared catadioptric optical system is designed. According to the requirements of other guided modes, the focal length and aperture of the primary mirror is fixed. The height of the principal ray reaching the relay system can be reduced. The aperture of the lens can be decreased, which will lower the cost. A compact infrared imaging system with a wavelength 3.7-4.8 μm, focal length <em>f</em>=300 mm, <em>F</em> number 2, is presented in this paper. The results show that the system performs well and the optical transfer function of each field is close to the diffraction limit. Between -50-70℃, passive optical athermalization can be realized in this system. For this system, the tolerance analysis and some ways of resisting the stray light are presented at last. It shows that the MIR system meet the demand of actual processing and application.

     

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