Experimental implementation of a holographic optical associative memory system using a thresholding microchannel spatial light modulator (MSLM) is presented. The first part of the system is basically a joint transform correlator, in which a liquid crystal light valve is used as a square-law converter for the inner product of the addressing and input memories. The MSLM is used as an active element to recall the associated data. If the device is properly thresholded, the system is capable of improving the quality of the output image.
Q W Song,
Francis T.S Yu,
"Holographic Associative Memory System Using A Thresholding Microchannel Spatial Light Modulator," Optical Engineering 28(5), 285533 (1 May 1989). https://doi.org/10.1117/12.7976993