Adjustable contrast optical target device for test of acquisition of photoelectric theodolite

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• 作者：XiaoXin Sun (1)
  XiangHeng Shen (2)
  SuHua Wang (2) (3) (4)
  Lu Ye (2)
  
• 关键词：photoelectric theodolite ; adjustable contrast ; integration sphere ; collimating lens
• 刊名：SCIENCE CHINA Technological Sciences
• 出版年：2013
• 出版时间：August 2013
• 年：2013
• 卷：56
• 期：8
• 页码：2052-2058
• 全文大小：693KB
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• 作者单位：XiaoXin Sun (1)
  XiangHeng Shen (2)
  SuHua Wang (2) (3) (4)
  Lu Ye (2)
  
  1. School of Computer Science and Information Technology, Northeast Normal University, Changchun, 130033, China
  2. Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, 130033, China
  3. University of Chinese Academy of Sciences, Beijing, 100049, China
  4. School of Information Technology, Changchun Vocational Institute of Technology, Changchun, 130033, China
  

文摘

A new device used to detect the low contrast target acquisition of photoelectric theodolite is designed and its reliability is experimentally demonstrated. The adjustable contrast optical target device, which can simulate the sky background luminance and a low contrast target, is established. It utilizes a big integrating sphere and a small one to simulate the luminance of the background and target respectively. Importantly, by controlling the luminous flux of the two integrating spheres, the targets and background radiance can be continuously adjustable under the condition of constant color temperature. Thus, the contrast can be controlled continuously in the range of 0%-0% and its stability is better than 1%. The biggest background luminance exceeds 60 W m-2 str-1 in the spectral range of 400-00 nm.