Supra-density optical photochromic rewrite data access system
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United States of America Patent
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Aug 21, 2001
Grant Date -
N/A
app pub date -
Aug 5, 1997
filing date -
Aug 6, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention provides a near-field photochromic device for a supra-density optical memory, comprising a scanner carrying a data storage medium, an optical head having a tip, to be used for recording, readout and erasing, and located in close proximity to the data storage medium, and at least two lasers, alternatingly optically alignable with the optical head, wherein the data storage medium is a film consisting of a photochromic compound and wherein the distance between the tip and the data storage medium is within the limits of the near field of the optical head.
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