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Proceedings Paper

Single lens joint transform correlator for high-resolution position location
Author(s): Thomas J. Grycewicz
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Paper Abstract

This paper demonstrates the use of the single lens joint transform correlator (SLJTC) to precisely determine the target location for on-axis correlation with the targets superimposed. The SLJTC is a two stage processor with an input stage identical to the chirp-encoded joint transform correlator. The first stage computes the chirp-modulated joint power spectrum. The correlation signal in the chirp-encoded joint power spectrum is an amplitude encoded lens function of Fresnel zone plate. The correlation output is in the focal plane of this zone plate. The location of the center of the zone plate is proportional to the correlation location. The magnification of the correlation plane is determined by the chirp displacement. This is used to amplify small shifts in the correlation location. The SLJTC has been experimentally demonstrated with an output plane magnification of 6.3 and a peak-to-noise ratio of 16.7 dB.

Paper Details

Date Published: 15 March 1996
PDF: 5 pages
Proc. SPIE 2752, Optical Pattern Recognition VII, (15 March 1996); doi: 10.1117/12.235669
Show Author Affiliations
Thomas J. Grycewicz, Air Force Rome Lab. (United States)

Published in SPIE Proceedings Vol. 2752:
Optical Pattern Recognition VII
David P. Casasent; Tien-Hsin Chao, Editor(s)

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