Apparatus and methods for threshold control of photopolymerization for holographic data storage using at least two wavelengths
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United States of America Patent
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Issued Date -
Aug 13, 2009
app pub date -
Oct 23, 2008
filing date -
Oct 23, 2007
priority date (Note) -
Abandoned
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Abstract
A polymerizable media, including holographic recording media, and methods of use of the same. The media comprises at least one monomer or oligomer which undergoes polymerization to form a polymer; a compound, which absorbs actinic radiation of a first wavelength and forms a sensitizer which absorbs actinic radiation of a second wavelength; and an initiator, which, in combination with the sensitizer, initiates polymerization of the at least one monomer or oligomer when said sensitizer is exposed to actinic radiation of the second wavelength.
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