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Proceedings Paper

Optical Correlation With Phase Encoding And Phase Filtering
Author(s): Richard D. Juday; Stanley E. Monroe Jr.; Don A. Gregory
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Paper Abstract

The inverted-cloverleaf cantilever beam version of the Texas Instruments Deformable Mirror Device (DMD) has become available for use as a spatial light modulator in hybrid optical correlators. In this form the DMD is active principally in phase rather than amplitude, though both quantities vary. The DMD can be used in both the input and filter planes of a correlator. The optical effects of addition in phase differ substantially from addition in electric intensity or even amplitude, so the theory developed for phase-only filtering of amplitude objects does not wholly apply. We have done simulations of the phase-encoded/phase-filtered correlation and show the expected correlation results for example images. Sensitivity to noise, scale, rotation and gain have been examined. Experimental work has been started to incorporate DMD's in an optical correlator.

Paper Details

Date Published: 19 February 1988
PDF: 7 pages
Proc. SPIE 0825, Spatial Light Modulators and Applications II, (19 February 1988); doi: 10.1117/12.941998
Show Author Affiliations
Richard D. Juday, NASA Johnson Space Center (United States)
Stanley E. Monroe Jr., Lockheed Engineering and Management Services Co., Inc. (United States)
Don A. Gregory, U. S. Army Missile Command (United States)

Published in SPIE Proceedings Vol. 0825:
Spatial Light Modulators and Applications II
Uzi Efron, Editor(s)

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