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20 August 1979 Proposed Smart Integrated-Optical Preprocessor Using Holographic Subtraction
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Proceedings Volume 0178, Smart Sensors; (1979) https://doi.org/10.1117/12.957282
Event: Technical Symposium East, 1979, Washington, D.C., United States
Abstract
It is possible to form an optical analog of a set of N analog voltages by passing an optical plane wave, confined in an electrooptic waveguide, under a set of N electrodes to which the voltages are applied. In the limit in which diffraction is ignored, the wavefront of the emerging guided wave will have superimposed upon it N discrete phase shifts. We have designed and are in the process of fabricating a number of processors which operate upon analog voltages encoded in this manner. These include a simple comparator in which incoming data are compared to a holographic record of the optical analog of a reference set, a device which is designed to perform an identification function by comparing each set of data to a library of reference sets, and a "smart" system based upon holographic self-subtraction, in which the processor is able to independently adapt to changes in background information. A laboratory model of the first of these preprocessors has been built and tested, the second is under development and experiments designed to define the operating parameters of the self-subtraction preprocessor are in progress. The principles of operation, potential applications and progress towards the implementation of the devices in an integrated optical configuration are described.
© (1979) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
C. M. Verber and D. W. Vahey "Proposed Smart Integrated-Optical Preprocessor Using Holographic Subtraction", Proc. SPIE 0178, Smart Sensors, (20 August 1979); https://doi.org/10.1117/12.957282
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