Method and apparatus for bistable optical information storage for erasable optical disks

Title: Method and apparatus for bistable optical information storage for erasable optical disks

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Abstract

A method and an optical device for bistable storage of optical information, together with reading and erasure of the optical information, using a photoactivated shift in a field dependent phase transition between a metastable or a bias-stabilized ferroelectric (FE) phase and a stable antiferroelectric (AFE) phase in an lead lanthanum zirconate titanate (PLZT). An optical disk contains the PLZT. Writing and erasing of optical information can be accomplished by a light beam normal to the disk. Reading of optical information can be accomplished by a light beam at an incidence angle of 15 to 60 degrees to the normal of the disk.

Inventors:

Land, Cecil E ^[1]; McKinney, Ira D ^[1]

Albuquerque, NM

Issue Date:: 1990-01-01

Research Org.:: AT&T

OSTI Identifier:: 867573

Patent Number(s):: 4965784

Assignee:: Sandia Corporation (Albuquerque, NM)

Patent Classifications (CPCs):: G - PHYSICS G11 - INFORMATION STORAGE G11B - INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER

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G - PHYSICS G11 - INFORMATION STORAGE G11B - INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
G11B9/02 - using ferroelectric record carriers
G11B13/00 - Recording simultaneously or selectively by methods covered by different main groups {among G11B3/00, G11B5/00, G11B7/00 and G11B9/00}
G11B7/004 - Recording, reproducing or erasing methods
G11B11/08 - using recording by electric charge or by variation of electric resistance or capacitance {

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DOE Contract Number:: AC04-76DP00789

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: method; apparatus; bistable; optical; information; storage; erasable; disks; device; reading; erasure; photoactivated; shift; field; dependent; phase; transition; metastable; bias-stabilized; ferroelectric; stable; antiferroelectric; afe; lead; lanthanum; zirconate; titanate; plzt; disk; contains; writing; erasing; accomplished; light; beam; normal; incidence; angle; 15; 60; degrees; zirconate titanate; light beam; optical device; information storage; optical information; incidence angle; phase transition; lanthanum zirconate; lead lanthanum; bistable optical; bistable storage; /369/

Citation Formats


                    Land, Cecil E, and McKinney, Ira D. Method and apparatus for bistable optical information storage for erasable optical disks.  United States: N. p., 1990. 
        Web.

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                    Land, Cecil E, & McKinney, Ira D. Method and apparatus for bistable optical information storage for erasable optical disks.  United States.

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                    Land, Cecil E, and McKinney, Ira D. Mon .  
        "Method and apparatus for bistable optical information storage for erasable optical disks".  United States.  https://www.osti.gov/servlets/purl/867573.

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@article{osti_867573,

  title        = {Method and apparatus for bistable optical information storage for erasable optical disks},

  author       = {Land, Cecil E and McKinney, Ira D},

  abstractNote = {A method and an optical device for bistable storage of optical information, together with reading and erasure of the optical information, using a photoactivated shift in a field dependent phase transition between a metastable or a bias-stabilized ferroelectric (FE) phase and a stable antiferroelectric (AFE) phase in an lead lanthanum zirconate titanate (PLZT). An optical disk contains the PLZT. Writing and erasing of optical information can be accomplished by a light beam normal to the disk. Reading of optical information can be accomplished by a light beam at an incidence angle of 15 to 60 degrees to the normal of the disk.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1990},

  month        = {1}

}

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