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Proceedings Paper

Optical correlation using bitonal magnitude-only spatial light modulators
Author(s): John P. Knapp; Roger L. Easton
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Paper Abstract

An optical correlator based on VanderLugt filtering has been constructed using a bitonal spatial light modulator for the transfer function of the matched filter. Because the spatial light modulator can reproduce bitonal magnitude signals only, the filter is introduced as a Lohmann cellular hologram. The traditional additive random phase may not be used, and thus filter functions constructed from uncompensated cellular holograms are inherently lowpass in nature. In the system reported here, improved performance results from an approximation of the ideal reference spectrum and by using error-diffused quantization.

Paper Details

Date Published: 17 March 2000
PDF: 8 pages
Proc. SPIE 3956, Practical Holography XIV and Holographic Materials VI, (17 March 2000); doi: 10.1117/12.380001
Show Author Affiliations
John P. Knapp, Booz-Allen & Hamilton (United States)
Roger L. Easton, Rochester Institute of Technology (United States)


Published in SPIE Proceedings Vol. 3956:
Practical Holography XIV and Holographic Materials VI
Sylvia H. Stevenson; Stephen A. Benton; T. John Trout; Sylvia H. Stevenson; T. John Trout, Editor(s)

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