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:
-
- Albuquerque, NM
- Los Lunas, NM
- Issue Date:
- Research Org.:
- AT&T
- 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 G06E - OPTICAL COMPUTING DEVICES
- 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.
Butler, Michael A, Land, Cecil E, Martin, Stephen J, & Pfeifer, Kent B. Ferroelectric optical image comparator. United States.
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.
@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 = {Fri Jan 01 00:00:00 EST 1993},
month = {Fri Jan 01 00:00:00 EST 1993}
}
Works referenced in this record:
Photoferroelectric effects in PLZT ceramics
journal, January 1978
- Land, C. E.; Peercy, P. S.
- Ferroelectrics, Vol. 22, Issue 1
Photoferroelectric image storage in antiferroelectric-phase PLZT ceramics
journal, August 1979
- Land, C. E.
- IEEE Transactions on Electron Devices, Vol. 26, Issue 8
A ferroelectric image memory
journal, January 1976
- Micheron, F.; Rouchon, J. M.; Vergnolle, M.
- Ferroelectrics, Vol. 10, Issue 1
Ferroelectric optical image comparator using PLZT thin films
journal, January 1988
- Martin, S. J.; Butler, M. A.; Land, C. E.
- Electronics Letters, Vol. 24, Issue 24