24 October 2016 Simulation of co-phase error correction of optical multi-aperture imaging system based on stochastic parallel gradient decent algorithm
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Proceedings Volume 9682, 8th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes; 96820V (2016) https://doi.org/10.1117/12.2243250
Event: Eighth International Symposium on Advanced Optical Manufacturing and Testing Technology (AOMATT2016), 2016, Suzhou, China
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.
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Xiaojun He, Xiaojun He, Haotong Ma, Haotong Ma, Chuanxin Luo, Chuanxin Luo, } "Simulation of co-phase error correction of optical multi-aperture imaging system based on stochastic parallel gradient decent algorithm", 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; https://doi.org/10.1117/12.2243250
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