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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.

Inventors:
 [1];  [1];  [1];  [2]
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  1. Albuquerque, NM
  2. Los Lunas, NM
Issue Date:
Research Org.:
AT&T Corp., Albuquerque, NM (United States)
OSTI Identifier:
869044
Patent Number(s):
5267179
Assignee:
United States of America as represented by United States (Washington, DC)
Patent Classifications (CPCs):
G - PHYSICS G06 - COMPUTING G06K - RECOGNITION OF DATA
G - PHYSICS G06 - COMPUTING G06E - OPTICAL COMPUTING DEVICES
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DOE Contract Number:  
AC04-76DP00789
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
ferroelectric; optical; image; comparator; lead; lanthanum; zirconate; titanate; thin-film; device; constructed; semi-transparent; transparent; conductive; electrode; film; metal; contact; nonconducting; substrate; photoinduced; current; represents; dot; product; stored; projected; one-dimensional; autocorrelations; performed; measuring; displacing; zirconate titanate; conductive metal; transparent conductive; optical image; induced current; lanthanum zirconate; lead lanthanum; stored image; image comparator; ferroelectric optical; conducting substrate; /382/

Citation Formats

Butler, Michael A, Land, Cecil E, Martin, Stephen J, and Pfeifer, Kent B. Ferroelectric optical image comparator. United States: N. p., 1993. Web.
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Butler, Michael A, Land, Cecil E, Martin, Stephen J, & Pfeifer, Kent B. Ferroelectric optical image comparator. United States.
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Butler, Michael A, Land, Cecil E, Martin, Stephen J, and Pfeifer, Kent B. Fri . "Ferroelectric optical image comparator". United States. https://www.osti.gov/servlets/purl/869044.
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@article{osti_869044,
title = {Ferroelectric optical image comparator},
author = {Butler, Michael A and Land, Cecil E and Martin, Stephen J and Pfeifer, Kent 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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1993},
month = {1}
}
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