Accession Number:

ADA285795

Title:

Optical Image Correlator Using Orthogonal Data Storage

Descriptive Note:

Final rept. Mar 1993-May 1994

Corporate Author:

ACCUWAVE CORP SANTA MONICA CA

Personal Author(s):

Report Date:

1994-08-01

Pagination or Media Count:

34.0

Abstract:

A compact optical image correlator using orthogonal, wavelength multiplexed Fourier transform holograms recorded in a photorefractive crystal has been demonstrated. Cross-correlation and auto-correlation measurements were obtained using randomly selected test images against the set of reference images stored in the orthogonal data storage volume hologram. Over 40 holograms were written in the 645 to 651 nm wavelength range with 2 diffraction efficiency and 1.5 A wavelength separation. A low power tunable external cavity semiconductor laser was used for readout, further demonstrating the portability of this approach. The input image translation tolerances on the correlation output and the effect of using partial images during readout were also investigated. Optical image correlation, Pattern recognition, Optical memory, Volume holography, Optical data storage

Subject Categories:

  • Electrooptical and Optoelectronic Devices
  • Nuclear Physics and Elementary Particle Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE