Ferroelectric optical image comparator

Patent · Tue Nov 30 00:00:00 EST 1993

OSTI ID:140718

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

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.

• Research Organization: AT&T
• DOE Contract Number: AC04-76DP00789
• Assignee: USDOE, Washington, DC (United States)
• Patent Number(s): US 5,267,179/A/
• OSTI ID: 140718
• Resource Relation: Other Information: PBD: 30 Nov 1993
• Country of Publication: United States
• Language: English

Related Subjects

99 MATHEMATICS
COMPUTERS
INFORMATION SCIENCE
MANAGEMENT
LAW
MISCELLANEOUS
IMAGES
COMPARATIVE EVALUATIONS
FERROELECTRIC MATERIALS
CORRELATIONS
ELECTRIC CONDUCTIVITY
PLZT
THIN FILMS
ELECTRODES