Sub-millisecond phase contrast wavefront sensor based on an optically addressed ferroelectric liquid crystal spatial light modulator

Leonid A. Bersnev; Mikhail A. Vorontsov; John W. Gowens II

doi:10.1117/12.454697

1 February 2002 Sub-millisecond phase contrast wavefront sensor based on an optically addressed ferroelectric liquid crystal spatial light modulator

Leonid A. Bersnev, Mikhail A. Vorontsov, John W. Gowens II

Author Affiliations +

Proceedings Volume 4493, High-Resolution Wavefront Control: Methods, Devices, and Applications III; (2002) https://doi.org/10.1117/12.454697
Event: International Symposium on Optical Science and Technology, 2001, San Diego, CA, United States

Abstract

A sub-millisecond wavefront sensor based on a non-linear Zernike filter is described. The sensor's key element is an optically addressed spatial light modulator (OASLM). The OASLM is composed of ferroelectric liquid crystal and an amorphous silicon carbide photo-conducting film. The OASLM is placed into the focal plane of a Fourier filtering system. The sensor operates with circularly polarized input light. For the high intensity (zero order) spectral component the deviation of the ferroelectric liquid crystal director by (pi) /4 (45 degree(s)) results in a (pi) /2 phase shift. This provides wavefront phase distortion visualization similar to a conventional Zernike filter. The registered characteristic response time of the sensor is near 0.2 ms for light intensity on the order of 100 nW.

Citation Download Citation

Leonid A. Bersnev, Mikhail A. Vorontsov, and John W. Gowens II "Sub-millisecond phase contrast wavefront sensor based on an optically addressed ferroelectric liquid crystal spatial light modulator", Proc. SPIE 4493, High-Resolution Wavefront Control: Methods, Devices, and Applications III, (1 February 2002); https://doi.org/10.1117/12.454697

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