Accession Number : ADP008663

Title :   A Compact Photorefractive Joint Transform Correlator for Industrial Recognition Tasks,

Corporate Author : THOMSON-CSF ORSAY (FRANCE)

Personal Author(s) : Rajbenbach, H. ; Bann, S. ; Huignard, J. P.

Report Date : 22 MAY 1992

Pagination or Media Count : 4

Abstract : Technology advances in solid state lasers, spatial light modulators and nonlinear optical materials are centrally important for the construction of optoelectronics processors that combine the massive interconnectivity and parallelism of optics with the accuracy and flexibility of digital electronics. In pattern recognition applications, hybrid optical-digital approaches in which optics performs correlation operations and electronics processes the output correlation plane for classification have already been demonstrated. Today, the performances of semiconductor lasers, diode-pumped YAG lasers, two dimensional liquid crystal light modulators and photorefractive materials allow the introduction of compact and more flexible optical hardware in optoelectronic processors. In this paper, we present a compact and reconfigurable multichannel joint transform optical correlator designed and constructed for industrial recognition applications.

Descriptors :   *OPTICAL CORRELATORS, *MULTICHANNEL, ELECTROOPTICS, PATTERN RECOGNITION, FOURIER TRANSFORMATION, LIGHT MODULATORS.

Subject Categories : Electrooptical and Optoelectronic Devices

Distribution Statement : APPROVED FOR PUBLIC RELEASE