Method and apparatus for bistable optical information storage for erasable optical disks
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:
-
- Albuquerque, NM
- Issue Date:
- 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
- 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.
Land, Cecil E, & McKinney, Ira D. Method and apparatus for bistable optical information storage for erasable optical disks. United States.
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.
@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}
}