Ferroelectric optical image comparator

Title: Ferroelectric optical image comparator

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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:: Butler, M.A.; Land, C.E.; Martin, S.J.; Pfeifer, K.B.

Issue Date:: 1993-11-30

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

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