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Proceedings Paper

Closed-loop phase-contrast adaptive optics system using liquid crystal phase modulators: experimental results
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Paper Abstract

Focal plane filters are being used to implement wave front sensors in high-resolution adaptive optics systems. We present experimental results obtained with a closed-loop adaptive optics system that uses a differential phase- contrast focal plane filter. The differential filter in our system is implemented using an electrically-addressed liquid-crystal spatial light modulator (LCSLM) operated in a phase-mostly mode. Two additional phase-mostly LCSLM devices are used in our experiment. One is used as a phase screen to introduce simulated turbulence into the propagating input beam, and the other is used as the wave front corrector driven by closed-loop feedback signals from the phase- contrast wave front sensor. This paper describes the system implementation and presents some preliminary experimental results.

Paper Details

Date Published: 1 February 2002
PDF: 10 pages
Proc. SPIE 4493, High-Resolution Wavefront Control: Methods, Devices, and Applications III, (1 February 2002); doi: 10.1117/12.454710
Show Author Affiliations
Michael K. Giles, New Mexico State Univ. (United States)
Anthony J. Seward, New Mexico State Univ. (United States)
Todd Giles, New Mexico State Univ. (United States)

Published in SPIE Proceedings Vol. 4493:
High-Resolution Wavefront Control: Methods, Devices, and Applications III
John D. Gonglewski; Mikhail A. Vorontsov; Mark T. Gruneisen, Editor(s)

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