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Proceedings Paper

Submicron position resolution using the chirp-modulated single-lens joint transform correlator
Author(s): Thomas J. Grycewicz
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Paper Abstract

This study demonstrates that the single-lens joint transform correlator is capable of position resolution accuracy on the order of a half micron. The single-lens joint transform correlator (JTC) is an extension of the chirp-encoded JTC in which the output lens has been eliminated. This is done by realizing that a Fresnel zone plate is formed in the joint power spectrum of the chirp-encoded JTC. This zone plate is illuminated with a plane wave and focuses to a point in the output plane. When chirp-encoding is used this way, it results in magnification of the output measurement. This is coupled with use of a higher order focus in the output plane to yield very high output resolution.

Paper Details

Date Published: 27 March 1997
PDF: 5 pages
Proc. SPIE 3073, Optical Pattern Recognition VIII, (27 March 1997); doi: 10.1117/12.270390
Show Author Affiliations
Thomas J. Grycewicz, Lockheed Martin Missiles & Space and Rome Lab. (United States)

Published in SPIE Proceedings Vol. 3073:
Optical Pattern Recognition VIII
David P. Casasent; Tien-Hsin Chao, Editor(s)

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