Optimal region of support for arbitrary filter SLMs

Adam Milstein; Stanley E. Monroe Jr.; Richard D. Juday

doi:10.1117/12.381595

31 March 2000 Optimal region of support for arbitrary filter SLMs

Adam Milstein, Stanley E. Monroe Jr., Richard D. Juday

Proceedings Volume 4043, Optical Pattern Recognition XI; (2000) https://doi.org/10.1117/12.381595
Event: AeroSense 2000, 2000, Orlando, FL, United States

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.

Citation Download Citation

Adam Milstein, Stanley E. Monroe Jr., and Richard D. Juday "Optimal region of support for arbitrary filter SLMs", Proc. SPIE 4043, Optical Pattern Recognition XI, (31 March 2000); https://doi.org/10.1117/12.381595

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KEYWORDS

Spatial light modulators

Signal to noise ratio

Optical filters

Photomasks

Image filtering

Interference (communication)

Optimal filtering

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