Submicron position resolution using the chirp-modulated single-lens joint transform correlator

Thomas J. Grycewicz

doi:10.1117/12.270390

27 March 1997 Submicron position resolution using the chirp-modulated single-lens joint transform correlator

Thomas J. Grycewicz

Proceedings Volume 3073, Optical Pattern Recognition VIII; (1997) https://doi.org/10.1117/12.270390
Event: AeroSense '97, 1997, Orlando, FL, United States

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.

Citation Download Citation

Thomas J. Grycewicz "Submicron position resolution using the chirp-modulated single-lens joint transform correlator", Proc. SPIE 3073, Optical Pattern Recognition VIII, (27 March 1997); https://doi.org/10.1117/12.270390

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