skip to main content
DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Ferroelectric optical image comparator

Abstract

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:
Research Org.:
AT&T
OSTI Identifier:
140718
Patent Number(s):
5267179
Assignee:
USDOE, Washington, DC (United States)
DOE Contract Number:  
AC04-76DP00789
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 30 Nov 1993
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

Citation Formats

Butler, M A, Land, C E, Martin, S J, and Pfeifer, K B. Ferroelectric optical image comparator. United States: N. p., 1993. Web.
Butler, M A, Land, C E, Martin, S J, & Pfeifer, K B. Ferroelectric optical image comparator. United States.
Butler, M A, Land, C E, Martin, S J, and Pfeifer, K B. Tue . "Ferroelectric optical image comparator". United States.
@article{osti_140718,
title = {Ferroelectric optical image comparator},
author = {Butler, M A and Land, C E and Martin, S J and Pfeifer, K B},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1993},
month = {11}
}