Ferroelectric optical image comparator

Butler, Michael A; Land, Cecil E; Martin, Stephen J; Pfeifer, Kent B

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:

Butler, Michael A ^[1]; Land, Cecil E ^[1]; Martin, Stephen J ^[1]; Pfeifer, Kent B ^[2]

Albuquerque, NM
Los Lunas, NM

Issue Date:: 1993-01-01

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 G06K - RECOGNITION OF DATA

G - PHYSICS G06 - COMPUTING G06E - OPTICAL COMPUTING DEVICES

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G - PHYSICS G06 - COMPUTING G06K - RECOGNITION OF DATA
G06K9/74 - Arrangements for recognition using optical reference masks

G - PHYSICS G06 - COMPUTING G06E - OPTICAL COMPUTING DEVICES
G06E1/02 - operating upon the order or content of the data handled
G06E3/005 - {using electro-optical or opto-electronic means}

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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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Works referenced in this record:

Photoferroelectric effects in PLZT ceramics
journal, January 1978

Land, C. E.; Peercy, P. S.
Ferroelectrics, Vol. 22, Issue 1
https://doi.org/10.1080/00150197808237366

Photoferroelectric image storage in antiferroelectric-phase PLZT ceramics
journal, August 1979

Land, C. E.
IEEE Transactions on Electron Devices, Vol. 26, Issue 8
https://doi.org/10.1109/T-ED.1979.19565

A ferroelectric image memory
journal, January 1976

Micheron, F.; Rouchon, J. M.; Vergnolle, M.
Ferroelectrics, Vol. 10, Issue 1
https://doi.org/10.1080/00150197608241942