24 October 2017 Adaptive optics correction based on stochastic parallel gradient descent technique using Zernike polynomials
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Proceedings Volume 10463, AOPC 2017: Space Optics and Earth Imaging and Space Navigation; 1046316 (2017) https://doi.org/10.1117/12.2284445
Event: Applied Optics and Photonics China (AOPC2017), 2017, Beijing, China
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.
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Huimin Ma, Huimin Ma, Yan Qiao, Yan Qiao, Chunshan Shen, Chunshan Shen, } "Adaptive optics correction based on stochastic parallel gradient descent technique using Zernike polynomials", Proc. SPIE 10463, AOPC 2017: Space Optics and Earth Imaging and Space Navigation, 1046316 (24 October 2017); doi: 10.1117/12.2284445; https://doi.org/10.1117/12.2284445
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