| 摘要 |
A large capacity associative memory of the holographic type. Coded information uniquely identifying first data and in the form of spatially modulated coherent light rays, forms an interference pattern with coded information representing second data in the form of spatially modulated coherent light rays and which are related to the first data in a predetermined fashion, as well as with a coherent light beam of relatively narrow cross-section whereby said interference pattern is recorded upon a record plate of photosensitive material in a direction transverse to the surface of the plate. Only that portion of the plate which is exposed to the small cross-section light beam develops the interference pattern, as a result of the use of a saturable die plate positioned in front of the photographic plate to prevent passage of light therethrough except at that area (or those areas) in which the coherent light exceeds a predetermined threshold value. The plate is filled with inter-related first and second data in a point-by-point basis by sequentially scanning the plate with the narrow cross-section beam.
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