Volume 14 Issue 2
Mar.  2021
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WANG Wei, LU Lin, ZHANG Tian-yi, WANG Wei-lu, LIU Yi-chen, MENG Qing-yu, XU Shu-yan. A 10−9-order point source transmission test facility[J]. Chinese Optics, 2021, 14(2): 390-396. doi: 10.37188/CO.2020-0050
Citation: WANG Wei, LU Lin, ZHANG Tian-yi, WANG Wei-lu, LIU Yi-chen, MENG Qing-yu, XU Shu-yan. A 10−9-order point source transmission test facility[J]. Chinese Optics, 2021, 14(2): 390-396. doi: 10.37188/CO.2020-0050

A 10−9-order point source transmission test facility

Funds:  Supported by Youth Innovation Promotion Association, CAS (No. 2019219); National Natural Science Foundation of China (NSFC) (No. 61705220)
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  • Corresponding author: wangwei123@ciomp.ac.cn
  • Received Date: 30 Mar 2020
  • Rev Recd Date: 06 May 2020
  • Available Online: 07 Sep 2020
  • Publish Date: 23 Mar 2021
  • In order to achieve the quantitative evaluation of the stray light attenuation in optical systems, we demonstrated a point source transmission test facility with 10−9-order sensitivity in this paper. We employed a pulsed source and measured the pulse to obtain the weak signal at the image plane, as well as to simplify the detection system. Using this scheme, we constructed a test facility with a maximum aperture of 600 mm and a test wavelength of 527 nm, and conducted the test with a 250 mm aperture optical system. Experimental results showed that the point transmission at a 60-degree incident angle is 1.68×10−9. The results prove that the test error of this facility is in the order of 10−9 or below, and the test facility has the ability to test 10−9-order point source transmissions. This technology can provide quantitative evaluation for various optical systems with strict stray light requirements, like astronomical telescopes, star sensors and spaced target monitor payloads.

     

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