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Proceedings Paper

Optimal region of support for arbitrary filter SLMs
Author(s): Adam Milstein; Stanley E. Monroe; Richard D. Juday
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Paper Abstract

When only certain filter pixels are allowed to transmit light, those `on' pixels constitute the region of support (ROS) for the filter. At those frequencies where noise power overwhelms signal power, or where the available values of the filter are not well aligned with the ideal spectral filter, the filter can actually work against the intent of the metric, and zero transmittance is preferable to what the SLM can do. In contrast to prior theories, which applied to only phase-only filters, we present algorithms for optimizing and studying ROS for an arbitrary SLM. We also present laboratory demonstrations of improvement in signal to noise ratio when a blocking mask is inserted into an optical correlator. A mask has detailed functional dependence on signal, noise power spectral density, the selected metric, and the realizable filter values. Rules are given for designing a mask that will be more broadly useful.

Paper Details

Date Published: 31 March 2000
PDF: 12 pages
Proc. SPIE 4043, Optical Pattern Recognition XI, (31 March 2000); doi: 10.1117/12.381595
Show Author Affiliations
Adam Milstein, NASA Johnson Space Ctr. (United States)
Stanley E. Monroe, Lockheed Martin Space Operations (United States)
Richard D. Juday, NASA Johnson Space Ctr. (United States)


Published in SPIE Proceedings Vol. 4043:
Optical Pattern Recognition XI
David P. Casasent; Tien-Hsin Chao, Editor(s)

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