Share Email Print

Proceedings Paper

Sub-millisecond phase contrast wavefront sensor based on an optically addressed ferroelectric liquid crystal spatial light modulator
Author(s): Leonid A. Bersnev; Mikhail A. Vorontsov; John W. Gowens
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper 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.

Paper Details

Date Published: 1 February 2002
PDF: 9 pages
Proc. SPIE 4493, High-Resolution Wavefront Control: Methods, Devices, and Applications III, (1 February 2002); doi: 10.1117/12.454697
Show Author Affiliations
Leonid A. Bersnev, Army Research Lab. (United States)
Mikhail A. Vorontsov, Army Research Lab. (United States)
John W. Gowens, Army Research Lab. (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)

© SPIE. Terms of Use
Back to Top