Holographic security system for optical discs
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United States of America Patent
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Apr 7, 1998
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N/A
app pub date -
Sep 5, 1996
filing date -
Sep 5, 1995
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Abstract
A technique for verifying the authenticity of a particular breed of pirated optical discs. By comparing the original source disc with the pirated version in the cross-polarization laser light of a polarimeter, the stress of the pirated replication will be revealed, verifying the existence of piracy.
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