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Proceedings Paper

Wavefront tip-tilt/focus-defocus control using a deformable piezoceramic mirror
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Paper Abstract

We present the results from studying different methods to control a deformable piezoceramic mirror with three degrees of freedom in the context of an optical transceiver system. In the first part, we compare the results of controlling the mirror with the Proportional Integral Differential Algorithm (PID) and the stochastic parallel gradient descent optimization technique (SPGD); results demonstrate that both techniques achieve similar performance. In the second part we built an optical transceiver system using deformable piezoceramic mirrors as active elements. The transceiver system was tested over a free space propagation path and controlled using different variants of the SPGD method. We show that the use of the SPGD algorithm as control method for the piezoceramic mirror adaptively corrects part of the turbulence-induced random wave front phase distortions.

Paper Details

Date Published: 18 October 2004
PDF: 8 pages
Proc. SPIE 5552, Target-in-the-Loop: Atmospheric Tracking, Imaging, and Compensation, (18 October 2004); doi: 10.1117/12.562391
Show Author Affiliations
Carlos J. Hernandez, New York Univ. (United States)
Gary Carhart, Army Research Lab. (United States)

Published in SPIE Proceedings Vol. 5552:
Target-in-the-Loop: Atmospheric Tracking, Imaging, and Compensation
Michael T. Valley; Mikhail A. Vorontsov, Editor(s)

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