Apparatus for the reversible, optical storage of data
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United States of America Patent
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Jan 23, 1990
Issued Date -
N/A
app pub date -
Oct 26, 1988
filing date -
Feb 4, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to an apparatus for reversible optical data storage using polymeric liquid crystals with mesogenic side groups as a storage medium, arranged to store information by means of selective variation of the order of the polymeric liquid crystals be means of a heat source. The macroscopically oriented film made from the liquid crystal polymer is held in the solid form retaining condition of the liquid crystal polymer in the temperature range below the glass temperature T.sub.g >T.sub.a (room remperature) for the purpose of storing the information. The polymer is then selectively and locally heated by means of the heat source into the isotropic liquid condition and the local information is fixed in the glass condition of the polymer after the heat source is turned off.
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