Accession Number : ADA266102


Title :   Spatial Light Rebroadcaster Architecture Study


Descriptive Note : Final rept. 1 Apr 1990-30 Sep 1992


Corporate Author : ENVIRONMENTAL RESEARCH INST OF MICHIGAN ANN ARBOR


Personal Author(s) : Cederquist, J ; Angell, D ; Tai, A ; Cartwright, S ; Subotic, N


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a266102.pdf


Report Date : Dec 1992


Pagination or Media Count : 160


Abstract : There is a need for a processor to perform real-time automatic target classification (ATC) that is compact and consumes little electrical power. Optical processors have the potential to provide the needed computational power in a small package. Substantial efforts have been expended in the development of spatial light modulators (SLMs) to meet the ATC requirements, but performance achieved thus far is still lacking. A new class of optical devices, spatial light rebroadcasters (SLRs) have been developed recently with potential performance far exceeding current SLMs. Instead of modulating the input light field, SLR absorbs the incident radiation and re-emits when triggered to do so. The triggering can be accomplished with an optical signal which also carries spatial information. The storage capability and the relationship between the intensities of the incident (input), triggering (readout) and emitted (output) radiations can be used to perform parallel processing of two-dimensional spatial data. In this report, several optical processing architectures were developed and five of the most promising were analyzed in detail. In addition, preliminary experiments were performed to evaluate the hardware required for two of the architectures.


Descriptors :   *SIGNAL PROCESSING , *NEURAL NETS , *OPTICAL PROCESSING , *LIGHT MODULATORS , *TARGET CLASSIFICATION , INPUT , OUTPUT , REAL TIME , SIGNAL TO NOISE RATIO , COMPUTER ARCHITECTURE , TARGETS , SIGNALS , OPTICAL LENSES , MULTISPECTRAL , AUTOMATIC , SPATIAL FILTERING , ARCHITECTURE , STORAGE , POWER , ARTIFICIAL INTELLIGENCE , ELECTRIC POWER , ACOUSTOOPTICS , HOLOGRAPHY , PARALLEL PROCESSING , INTENSITY , TWO DIMENSIONAL , ELECTROOPTICS , SPATIAL DISTRIBUTION , RADIATION


Subject Categories : Electrooptical and Optoelectronic Devices
      Cybernetics
      Optical Detection and Detectors
      Target Direction, Range and Position Finding
      Optics


Distribution Statement : APPROVED FOR PUBLIC RELEASE