Open AccessA Zernike mode decomposition decoupling control algorithm for dual deformable mirrors adaptive optics system
Author(s) -
Wenjin Liu,
Lizhi Dong,
Ping Yang,
Xiang Lei,
Hu Yan,
Bing Xu
Publication year - 2013
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.21.023885
Subject(s) - zernike polynomials , deformable mirror , adaptive optics , wavefront , decoupling (probability) , strehl ratio , optics , wavefront sensor , computer science , control theory (sociology) , physics , algorithm , artificial intelligence , control (management) , control engineering , engineering
A simple but effective decoupling control algorithm based on Zernike mode decomposition for adaptive optics systems with dual deformable mirrors is proposed. One of the two deformable mirrors is characterized with a large stroke (woofer) and the other with high spatial resolutions (tweeter). The algorithm works as follows: wavefront gradient vector is decoupled using the Zernike modes at first, and then the control vector for the woofer is generated with low order Zernike coefficients to eliminate high order modes. At the same time the control vector for the tweeter is reset by a constraint matrix in order to avoid coupling error accumulation. Simulation indicates the algorithm could get better performance compared with traditional Zernike mode decomposition control algorithms. Experiments demonstrate that this algorithm can effectively compensate for phase distortions and significantly suppress the coupling between the woofer and tweeter.