Relaxation Method Of Compensation In An Optical Correlator

Richard D. Juday; Brian J. Daiuto

doi:10.1117/12.7974201

1 November 1987 Relaxation Method Of Compensation In An Optical Correlator

Richard D. Juday, Brian J. Daiuto

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Optical Engineering, Vol. 26, Issue 11, 261094 (November 1987). https://doi.org/10.1117/12.7974201

Abstract

An iterative method is proposed for the sharpening of programmable filters in a 4-f optical correlator. Continuously variable spatial light modulators (SLMs) permit the fine adjustment of optical processing filters so as to compensate for the departures from ideal behavior of a real optical system. Although motivated by the development of continuously variable phase-only SLMs, the proposed sharpening method is also applicable to amplitude modulators and, with appropriate adjustments, to binary modulators as well. A computer simulation is presented that illustrates the potential effectiveness of the method: an image is placed on the input to the correlator, and its corresponding phase-only filter is adjusted (allowed to relax) so as to produce a progressively brighter and more centralized peak in the correlation plane. The technique is highly robust against the form of the system's departure from ideal behavior.

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Richard D. Juday and Brian J. Daiuto "Relaxation Method Of Compensation In An Optical Correlator," Optical Engineering 26(11), 261094 (1 November 1987). https://doi.org/10.1117/12.7974201

Published: 1 November 1987

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