Optical image correlation using high-speed multiple quantum well spatial light modulators

Keith Kang; Jeffry S. Powell; Richard D. Stack; Charles G. Garvin; John Alfred Trezza; James C. Kirsch; Brian K. Jones

doi:10.1117/12.341289

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9 March 1999 Optical image correlation using high-speed multiple quantum well spatial light modulators

Keith Kang, Jeffry S. Powell, Richard D. Stack, Charles G. Garvin, John Alfred Trezza, James C. Kirsch, Brian K. Jones

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Proceedings Volume 3715, Optical Pattern Recognition X; (1999) https://doi.org/10.1117/12.341289
Event: AeroSense '99, 1999, Orlando, FL, United States

Abstract

We review GaAs Fabry-Perot vertical cavity multiple quantum well (MQW) spatial light modulators (SLMs) developed at Sanders, a Lockheed Martin Company, and demonstrate their use in optical image correlation. These MQW SLMs are reflective- mode modulators using electrically-tunable absorption to modulate the reflected intensity. The operation of the MQW SLMs with a newly-developed Labview graphical user interface is described. A compact Vander-Lugt image correlator is described which was configured using MQW SLMs: binary 128 X 128 pixel image input with a binary filter plane. In addition, the architecture of 8-bit gray-scale MQW-SLM module developed at Sanders is discussed. The performance of the image correlator was characterized using amplitude-encoded binary phase-only filters and various test targets including test imagery supplied by US Army AMCOM, and is compared with simulations for peak-to-secondary efficiencies on these data. Finally, high-speed (250,000 frames per second) target recognition of 128 X 128 pixels binary input imagery is demonstrated.

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Keith Kang, Jeffry S. Powell, Richard D. Stack, Charles G. Garvin, John Alfred Trezza, James C. Kirsch, and Brian K. Jones "Optical image correlation using high-speed multiple quantum well spatial light modulators", Proc. SPIE 3715, Optical Pattern Recognition X, (9 March 1999); https://doi.org/10.1117/12.341289

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