High-precision system identification method for a deformable mirror in wavefront control

被引：12
|
作者：
Huang, Lei [1 ]
Ma, Xingkun [1 ]
Bian, Qi [1 ]
Li, Tenghao [1 ]
Zhou, Chenlu [1 ]
Gong, Mali [1 ]
机构：
[1] Tsinghua Univ, Ctr Photon & Elect, Dept Precis Instruments, Beijing 100084, Peoples R China
来源：
APPLIED OPTICS | 2015年 / 54卷 / 14期
基金：
中国国家自然科学基金;
关键词：
ADAPTIVE OPTICS;
D O I：
10.1364/AO.54.004313
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Based on a mathematic model, the relation between the accuracy of the influence matrix and the performance of the wavefront correction is established. Based on the least squares method, a two-step system identification is proposed to improve the accuracy of the influence matrix, where the measurement noise can be suppressed and the nonlinearity of the deformable mirror can be compensated. The validity of the two-step system identification method is tested in the experiment, where improvements in wavefront correction precision as well as closed-loop control efficiency were observed. (C) 2015 Optical Society of America
引用
收藏
页码：4313 / 4317
页数：5
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