Abstract

The Spatial Light Modulator (SLM) is perhaps the most critical element in several optical processing architectures such as the Vander Lugt Matched Filter Correlator and the Joint Transform Correlator. The SLM is a device used to encode information onto a laser beam so that it may be processed by a coherent optical system. Several devices are available which perform this critical task. The optical characteristics of these devices will determine, to a large extent, the speed, resolution, and efficiency of an optical system since the SLM is responsible for supplying the system with new information. The Hughes Liquid Crystal Light Valve (LCLV) is a reflection type SLM that is both optically addressed and read. The limitations of the LCLV are its low sensitivity to the write light, low resolution, and slow response time. The Semetex/Litton Magneto-Optic Device (MOD) is a transmission type SLM that is electrically addressed and optically read. The MOD is comparable in resolution to the LCLV but the optical throughput of the device is only 3-5%. Neither device will operate at high frame rates.

© 1988 Optical Society of America