Volume 15 Issue 3
May  2022
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ZHANG Tian-yu, WANG Gang, ZHANG Xi, DOU Jiang-pei. Staticaberration correction technique for adaptive optics system based on focal-plane copy approach[J]. Chinese Optics, 2022, 15(3): 545-551. doi: 10.37188/CO.2021-0182
Citation: ZHANG Tian-yu, WANG Gang, ZHANG Xi, DOU Jiang-pei. Staticaberration correction technique for adaptive optics system based on focal-plane copy approach[J]. Chinese Optics, 2022, 15(3): 545-551. doi: 10.37188/CO.2021-0182

Staticaberration correction technique for adaptive optics system based on focal-plane copy approach

Funds:  Supported by the National Natural Science Foundation of China (No. 11827804, No. U2031210, No. 11673042); Special Scientific Research Funds for China′s Manned Space Project Sky Survey Space Telescope (No. CMS-CSST-2021-A11);Key foreign cooperation projects, the Chinese Academy of Sciences (No. 114A32KYSB20160057); The Strategic Priority Research Program (category A) of the Chinese Academy of Sciences (No. XDA15010300)
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  • Corresponding author: gwang@niaot.ac.cn
  • Received Date: 27 Oct 2021
  • Rev Recd Date: 17 Nov 2021
  • Accepted Date: 21 Jan 2022
  • Available Online: 27 Jan 2022
  • Publish Date: 20 May 2022
  • A key factor limiting the performance of Adaptive Optics (AO) systems is the Non-Common Path Aberration (NCPA) caused by the difference between the wavefront sensor path and the science imaging path. Meanwhile, a static aberration will inevitably be introduced in the common path of the AO system. This paper proposes a correction technology based on a copy of the focal-plane Point Spread Function (PSF) to correct static aberration in the scientific imaging path of AO systems. This technology uses the PSF generated by the laser point light source as the reference PSF, and copies that to the science imaging path of the AO system through iterative optimization algorithms. Experimental results show that the Strehl Ratio (SR) increases from the initial 0.312 to 0.995 after correction. This technology can still stably and quickly obtain global optimization results, especially when the initial static aberration of the system is large.

     

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