Device and method for optical data storage having multiple optical states
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United States of America Patent
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Sep 5, 2000
Grant Date -
N/A
app pub date -
Nov 20, 1997
filing date -
May 23, 1995
priority date (Note) -
Expired
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Abstract
The optical storage device and method includes a fluorescent layer arranged on a substrate and having a surface. The fluorescent layer is composed of fluorescent dye molecules embedded in a transparent polymeric base material. A group of data-carrying structures are arranged in the fluorescent layer. Each of the data-carrying structures has more than two optical states represented by a specific degree of quenching of fluorescence emitted from the data-carrying structure when irradiated with a fluorescence exciting radiation.
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