Interference filters as nonlinear decision-making elements for three-spot pattern recognition and associative memories

L. Wang, V. Esch, R. Feinleib, L. Zhang, R. Jin, H. M. Chou, Robert W. Sprague, H. Angus Macleod, G. Khitrova, Hyatt M. Gibbs, Kelvin Wagner, Demetri Psaltis

Research output: Contribution to journalLetter

14 Scopus citations

Abstract

Simple patterns consisting of three spots (V and T) have been recognized by dividing, shifting, and recombining beams onto bistable ZnS interference filters. This experiment demonstrates AND-gate operation, cascading, and a moderate amount of parallelism, but a laser power of several watts was required and the response times were several milliseconds. An associative memory for fingerprint identification has been constructed using a VanderLugt correlator and an interference filter as a reflective thresholding device.

Original languageEnglish (US)
Pages (from-to)1715-1720
Number of pages6
JournalApplied optics
Volume27
Issue number9
DOIs
StatePublished - May 1988

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering

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    Wang, L., Esch, V., Feinleib, R., Zhang, L., Jin, R., Chou, H. M., Sprague, R. W., Macleod, H. A., Khitrova, G., Gibbs, H. M., Wagner, K., & Psaltis, D. (1988). Interference filters as nonlinear decision-making elements for three-spot pattern recognition and associative memories. Applied optics, 27(9), 1715-1720. https://doi.org/10.1364/AO.27.001715