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Title: Ferroelectric optical image comparator

A ferroelectric optical image comparator has a lead lanthanum zirconate titanate thin-film device which is constructed with a semi-transparent or transparent conductive first electrode on one side of the thin film, a conductive metal second electrode on the other side of the thin film, and the second electrode is in contact with a nonconducting substrate. A photoinduced current in the device represents the dot product between a stored image and an image projected onto the first electrode. One-dimensional autocorrelations are performed by measuring this current while displacing the projected image. 7 figures.
Inventors:
; ; ;
Issue Date:
OSTI Identifier:
140718
Assignee:
USDOE, Washington, DC (United States) SNL; SCA: 990000; PA: EDB-94:061061; SN: 94001164740
Patent Number(s):
US 5,267,179/A/
Contract Number:
AC04-76DP00789
Resource Relation:
Other Information: PBD: 30 Nov 1993
Research Org:
AT&T Corporation
Country of Publication:
United States
Language:
English
Subject:
99 MATHEMATICS, COMPUTERS, INFORMATION SCIENCE, MANAGEMENT, LAW, MISCELLANEOUS; IMAGES; COMPARATIVE EVALUATIONS; FERROELECTRIC MATERIALS; CORRELATIONS; ELECTRIC CONDUCTIVITY; PLZT; THIN FILMS; ELECTRODES