Parallel perturbation gradient descent algorithm for adaptive wavefront correction

被引：17
|
作者：
Carhart, GW [1 ]
Ricklin, JC [1 ]
Sivokon, VP [1 ]
Vorontsov, MA [1 ]
机构：
[1] USA,RES LAB,ADELPHI,MD 20823
来源：
ADAPTIVE OPTICS AND APPLICATIONS | 1997年 / 3126卷
关键词：
adaptive imaging systems; adaptive phase distortion suppression; gradient descent optimization; stochastic parallel perturbations;
D O I：
10.1117/12.279040
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
An adaptive imaging system with a liquid crystal phase modulator having 127 individually addressed hexagonal elements is experimentally studied. The system operation is based on direct optimization of an image quality metric dependent on image plane intensity distribution. For optimization of the image quality metric we applied a modified version of a stochastic perturbation gradient descent algorithm. Experimental results demonstrated the efficiency of the algorithm for high-resolution adaptive wavefront correction in an imaging system. A modification of the algorithm that significantly accelerates algorithm convergence is suggested and studied by numerical simulation.
引用
收藏
页码：221 / 227
页数：7
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