Volume 15 Issue 5
Sep.  2022
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NIU Sheng-guang, GUO Liang, LU Zhen-yu, HAN Kang. Large-scale splicing focal plane error distribution based on optical-structural-thermal integration analysis[J]. Chinese Optics, 2022, 15(5): 1000-1006. doi: 10.37188/CO.2022-0094
Citation: NIU Sheng-guang, GUO Liang, LU Zhen-yu, HAN Kang. Large-scale splicing focal plane error distribution based on optical-structural-thermal integration analysis[J]. Chinese Optics, 2022, 15(5): 1000-1006. doi: 10.37188/CO.2022-0094

Large-scale splicing focal plane error distribution based on optical-structural-thermal integration analysis

doi: 10.37188/CO.2022-0094
Funds:  Supported by National Natural  Science Foundation of China (No. 61605203); Youth Innovation Promotion Association of Chinese Academy of Sciences (No. 2015173)
More Information
  • Corresponding author: guoliang@ciomp.ac.cn
  • Received Date: 09 May 2022
  • Rev Recd Date: 31 May 2022
  • Available Online: 13 Jul 2022
  • As the requirements of space astronomy, situational awareness, environmental monitoring and other fields grow higher, space telescopes are developing toward large fields of view and large apertures. Large-scale focal plane stitching technology is the key technology of large-field space telescopes. The allocation method of the main focal plane flatness error (P-V value) is generally a direct assignment method based on experience, which is prone to unreasonable error allocation.In this paper, a method of splicing focal plane error allocation is proposed, which can accurately allocate important parameter errors through optical-structural-thermal integration analysis. Taking 4×4 mechanical direct splicing focal plane with 16 pieces of Complementary Metal Oxide Semiconductor(CMOS) image sensor as an example, an error tree of splicing focal planes is established. The influence of important parameters such as gravity and temperature on the flatness of splicing focal plane is analyzed by the method of optical-structural-thermal integration analysis. The error distribution result is finally given. The analysis shows that the flatness errors caused by gravity under two different attitudes are 0.28 μm and 1.55 μm respectively, and the total flatness error caused by temperature is 5.5 μm. After leaving a 30% margin, the assigned values of the flatness error caused by gravity and temperature are determined to be 2 μm and 7.2 μm, respectively.


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