Adaptive optics system with micromachined mirror array and stochastic gradient descent controller

被引：4
|
作者：
Weyrauch, T [1 ]
Vorontsov, MA [1 ]
Bifano, TG [1 ]
Giles, MK [1 ]
机构：
[1] USA, Res Lab, Informat Sci & Technol Directorate, Adelphi, MD 20783 USA
来源：
HIGH-RESOLUTION WAVEFRONT CONTROL: METHODS, DEVICES, AND APPLICATIONS II | 2000年 / 4124卷
关键词：
adaptive optics; MEMS deformable mirror; model-free optimization; parallel gradient descent;
D O I：
10.1117/12.407500
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
An adaptive laser beam focusing system comprising a 4x4 segment (5x5 actuator) MEMS deformable mirror developed at Boston University is presented. Mirror actuators were controlled by a circuit using VLSI chips implementing a stochastic parallel gradient descent algorithm. The system allowed for an enhancement of the iteration rate up to 5900 s(-1), Limited only by the used computer equipment. Results of experiments for characterization of the MEMS mirror response and the adaptation speed of the system are reported. A further improvement of adaptation speed was achieved by modification of the control algorithm implementing a self-optimization of one parameter.
引用
收藏
页码：178 / 188
页数：11
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