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Optical Engineering

Binary phase-only 1/f joint transform correlator using a ferroelectric liquid crystal spatial light modulator
Author(s): Tim D. Wilkinson; William A. Crossland; V. Kapsalis
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Paper Abstract

We present a new approach to implementing the joint transform correlator based on a single ferroelectric spatial light modulator used as a binary phase-only device. The correlator is a 1/f joint transform correlator that uses two passes through the optical system to generate the correlation peaks. The input scene and reference image are encoded with a checkerboard pattern to produce a spectrum with no zero order. The spectrum is then convolutionally binarized and replayed on the same spatial light modulator. Experimental results demonstrate strong correlation peaks, with the zero order in the correlation plane reduced to 6 dB below the correlation peaks. The correlator also demonstrates enhanced differentiation between closely correlated images.

Paper Details

Date Published: 1 February 1999
PDF: 4 pages
Opt. Eng. 38(2) doi: 10.1117/1.602268
Published in: Optical Engineering Volume 38, Issue 2
Show Author Affiliations
Tim D. Wilkinson, Cambridge Univ. (United Kingdom)
William A. Crossland, Univ. of Cambridge (United Kingdom)
V. Kapsalis, Cambridge Univ. (United Kingdom)

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