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

Patent · Mon Jan 01 00:00:00 EST 1990

OSTI ID:867573

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

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1. Albuquerque, NM

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.

• Research Organization: AT&T
• DOE Contract Number: AC04-76DP00789
• Assignee: Sandia Corporation (Albuquerque, NM)
• Patent Number(s): US 4965784
• OSTI ID: 867573
• Country of Publication: United States
• Language: English

Related Subjects

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
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