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}
}
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