Laser & Optoelectronics Progress, Volume. 47, Issue 4, 42201(2010)
Using Stochastic Parallel Gradient Descent Control Algorithm to Calibrate Sencond Mirror in Three-Mirror System
The primary method for calibrating a co-axial three-mirror system is the computer-aided alignment method,and it is complicated for having to calculate wavefront error. Stochastic parallel gradient descent (SPGD) control algorithm is used to caliberate the second mirror of three-mirror system,with no need to calculate wavefront error. Through adjusting the six degrees of freedom of the second mirror directly,finding system extremal value and then calibrating system error,the calibrating process is predigested. The major factors that will affect computing speed of SPGD algorithm are analysed and optimized,and the simulation results show that SPGD algorithm can distinctly improve peak-valley value and root-mean-square of the system.
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Han Xingzi, Yu Xin, Dong Bing. Using Stochastic Parallel Gradient Descent Control Algorithm to Calibrate Sencond Mirror in Three-Mirror System[J]. Laser & Optoelectronics Progress, 2010, 47(4): 42201
Category: Optical Design and Fabrication
Received: Aug. 2, 2009
Accepted: --
Published Online: Mar. 24, 2010
The Author Email: Xingzi Han (xinger@bit.edu.cn)