Optical Correlation With Phase Encoding And Phase Filtering

Richard D. Juday; Stanley E. Monroe Jr.; Don A. Gregory

doi:10.1117/12.941998

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19 February 1988 Optical Correlation With Phase Encoding And Phase Filtering

Richard D. Juday, Stanley E. Monroe Jr., Don A. Gregory

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Proceedings Volume 0825, Spatial Light Modulators and Applications II; (1988) https://doi.org/10.1117/12.941998
Event: 31st Annual Technical Symposium on Optical and Optoelectronic Applied Sciences and Engineering, 1987, San Diego, CA, United States

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.

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Richard D. Juday, Stanley E. Monroe Jr., and Don A. Gregory "Optical Correlation With Phase Encoding And Phase Filtering", Proc. SPIE 0825, Spatial Light Modulators and Applications II, (19 February 1988); https://doi.org/10.1117/12.941998

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