Optical processing with feedback using smart-pixel spatial light modulators

Jonathan S. Kane; Thomas G. Kincaid; Philip L. Hemmer

doi:10.1117/1.601646

1 March 1998 Optical processing with feedback using smart-pixel spatial light modulators

Jonathan S. Kane, Thomas G. Kincaid, Philip L. Hemmer

Optical Engineering, Vol. 37, Issue 3, (March 1998). https://doi.org/10.1117/1.601646

A spatial light modulator is often used as the basic element in real-time recognition architectures. However, many of the devices suffer from poor uniformity and/or nonlinearities that affect the overall performance of any real-time recognition scheme. We propose using optical feedback as a method of improving device performance. We demonstrate both positive and negative feedback separately through a mixture of on-board electronic processors and optical polarization intensity encoding. Placing the spatial light modulator in a positive feedback system causes the system to act like a memory. Placing the spatial light modulator in a negative feedback system makes the spatial light modulator response more analog, which in turn leads to improved uniformity.

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Jonathan S. Kane, Thomas G. Kincaid, and Philip L. Hemmer "Optical processing with feedback using smart-pixel spatial light modulators," Optical Engineering 37(3), (1 March 1998). https://doi.org/10.1117/1.601646

Published: 1 March 1998

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