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Proceedings Paper

Simulation of co-phase error correction of optical multi-aperture imaging system based on stochastic parallel gradient decent algorithm
Author(s): Xiaojun He; Haotong Ma; Chuanxin Luo
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Paper Abstract

The optical multi-aperture imaging system is an effective way to magnify the aperture and increase the resolution of telescope optical system, the difficulty of which lies in detecting and correcting of co-phase error. This paper presents a method based on stochastic parallel gradient decent algorithm (SPGD) to correct the co-phase error. Compared with the current method, SPGD method can avoid detecting the co-phase error. This paper analyzed the influence of piston error and tilt error on image quality based on double-aperture imaging system, introduced the basic principle of SPGD algorithm, and discuss the influence of SPGD algorithm’s key parameters (the gain coefficient and the disturbance amplitude) on error control performance. The results show that SPGD can efficiently correct the co-phase error. The convergence speed of the SPGD algorithm is improved with the increase of gain coefficient and disturbance amplitude, but the stability of the algorithm reduced. The adaptive gain coefficient can solve this problem appropriately. This paper’s results can provide the theoretical reference for the co-phase error correction of the multi-aperture imaging system.

Paper Details

Date Published: 24 October 2016
PDF: 8 pages
Proc. SPIE 9682, 8th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, 96820V (24 October 2016); doi: 10.1117/12.2243250
Show Author Affiliations
Xiaojun He, Institute of Optics and Electronics (China)
Key Lab. of Optical Engineering (China)
Univ. of Chinese Academy of Sciences (China)
Haotong Ma, Institute of Optics and Electronics (China)
Key Lab. of Optical Engineering (China)
National Univ. of Defense Technology (China)
Chuanxin Luo, Institute of Optics and Electronics (China)
Key Lab. of Optical Engineering (China)


Published in SPIE Proceedings Vol. 9682:
8th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes
Myung K. Cho; Bin Fan, Editor(s)

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