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Proceedings Paper

Adaptive optics correction based on stochastic parallel gradient descent technique using Zernike polynomials
Author(s): Huimin Ma; Yan Qiao; Chunshan Shen
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Paper Abstract

Adaptive optics systems based on stochastic parallel gradient descent optimization (SPGD) have yet shown great potential on compensation of phase distortions induced by wave propagation through atmosphere turbulence. One of the key technique is increasing the converge rate of SPGD correction system. In the present study, it is shown that the convergence rate of the algorithm will be greatly reduced with the increase of the number of corrector units. In this paper, an improved SPGD optimization process which is based on Zernike-mode is developed. The optimized object is changed from the voltage to Zernike coefficient. Adaptive optics correction system simulation model base on SPGD for a laser beam projecting system, and the numerical simulation of compensation process of random atmosphere turbulence is proposed. To improve the converge speed, we explore to ameliorate the correction system by controlling the perturbation considering atmosphere aberration proportion. The results show that the system converges smoothly and increasingly after considering the aberration proportion by Zernike correction.

Paper Details

Date Published: 24 October 2017
PDF: 7 pages
Proc. SPIE 10463, AOPC 2017: Space Optics and Earth Imaging and Space Navigation, 1046316 (24 October 2017); doi: 10.1117/12.2284445
Show Author Affiliations
Huimin Ma, Anhui Agricultural Univ. (China)
Yan Qiao, Anhui Agricultural Univ. (China)
Chunshan Shen, Anhui Agricultural Univ. (China)


Published in SPIE Proceedings Vol. 10463:
AOPC 2017: Space Optics and Earth Imaging and Space Navigation
Carl Nardell; Suijian Xue; Huaidong Yang, Editor(s)

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