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Proceedings Paper

Optoelectronic Zernike filter for high-resolution wavefront analysis using phase only liquid crystal spatial light modulator
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Paper Abstract

An opto-electronic technique for high-resolution wave-front phase imaging is presented and demonstrated experimentally. The technique is analogous to the conventional Zernike phase- contrast approach, but uses modern spatial light modulator technology to increase robustness and improve performance. Because they provide direct measurements of wave-front phase (rather than wave-front slope measurements, as in Shack- Hartmann sensors), robust phase-contrast sensors have potential applications in high-speed, high-resolution adaptive optic systems. Advantages of the opto-electronic approach over alternative advanced phase-contrast techniques (such as a related phase-contrast sensor which uses a liquid-crystal light valve exhibiting a Kerr-type optical response to perform Fourier filtering) are discussed. The SLM used for the experimental results is a 128 X 128-element pixilated phase-only liquid crystal spatial light modulator from Boulder Nonlinear Systems, Inc.

Paper Details

Date Published: 22 November 2000
PDF: 10 pages
Proc. SPIE 4124, High-Resolution Wavefront Control: Methods, Devices, and Applications II, (22 November 2000); doi: 10.1117/12.407497
Show Author Affiliations
Gary W. Carhart, Army Research Lab. (United States)
Mikhail A. Vorontsov, Army Research Lab. (United States)
Eric W. Justh, Univ. of Maryland/College Park (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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