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Proceedings Paper

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

An adaptive laser beam focusing system comprising a 4 X 4 segment (5 X 5 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.

Paper Details

Date Published: 22 November 2000
PDF: 11 pages
Proc. SPIE 4124, High-Resolution Wavefront Control: Methods, Devices, and Applications II, (22 November 2000); doi: 10.1117/12.407500
Show Author Affiliations
Thomas Weyrauch, Army Research Lab. and New Mexico State Univ. (United States)
Mikhail A. Vorontsov, Army Research Lab. (United States)
Thomas G. Bifano, Boston Univ. (United States)
Michael K. Giles, New Mexico State Univ. (United States)


Published in SPIE Proceedings Vol. 4124:
High-Resolution Wavefront Control: Methods, Devices, and Applications II
John D. Gonglewski; Mikhail A. Vorontsov; Mark T. Gruneisen, Editor(s)

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