Holographic security system for optical discs

Details Holographic security system for optical discs Holographic security system for optical discs

1996-09-05

1998-04-07

Huber, Paul W.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 58, 369103, 356369, G11B 700, G01J 400

Patent

active

057372985

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.

REFERENCES:
patent: 5138604 (1992-08-01), Umeda et al.
patent: 5549953 (1996-08-01), Li
patent: 5587984 (1996-12-01), Owa et al.
patent: 5608717 (1997-03-01), Ito et al.

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