Accession Number : ADD013410

Title :   Real-Time Programmable Optical Correlator.

Descriptive Note : Patent, Filed 22 Oct 85, patented 22 Sep 87,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Yu, Francis T

Report Date : 22 Sep 1987

Pagination or Media Count : 9

Abstract : A real-time programmable joint transform optical correlator incorporating a magneto-optic spatial light modulator and a liquid crystal light valve therein. Object functions to be correlated are input into the magneto-optic spatial light modulator by a programmable microcomputer as input signals. Real time correlation takes place at the liquid crystal light valve with a coherent read out beam. Cross correlation between the input functions (signals) are obtained through the inverse Fourier transform of the read out coherent illumination and are subsequently output from the correlator.

Descriptors :   *PATENTS, *COMPUTER PROGRAMMING, *CROSS CORRELATION, *FOURIER TRANSFORMATION, *LIGHT MODULATORS, *MICROCOMPUTERS, *OPTICAL CORRELATORS, BEAMS(RADIATION), COHERENCE, CORRELATION, ILLUMINATION, INPUT, KERR CELLS, LIQUID CRYSTALS, MAGNETOOPTICS, READ OUT TECHNIQUES, REAL TIME, SIGNALS, SPATIAL DISTRIBUTION

Subject Categories : Optics
      Computer Programming and Software
      Computer Hardware

Distribution Statement : APPROVED FOR PUBLIC RELEASE