Laser reactive dyes for DVD copy protection system

Details Laser reactive dyes for DVD copy protection system Laser reactive dyes for DVD copy protection system

2005-10-04

2005-10-04

Tran, Thang V. (Department: 2653)

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

C369S288000, C369S053210

Reexamination Certificate

active

06952392

ABSTRACT:
A method and system for providing copy-protected optical medium using transient optical state change security materials capable of changing optical state when exposed to a wavelength of about 630 nm to about 660 nm and software code to detect such change in optical state.

REFERENCES:
patent: 5815484 (1998-09-01), Smith et al.
patent: 6011772 (2000-01-01), Rollhaus et al.
patent: 6228440 (2001-05-01), Dailey et al.
patent: 6589626 (2003-07-01), Selinfreund et al.
patent: 6641886 (2003-11-01), Bakos et al.
patent: WO 02/03386 (2002-01-01), None
J. Daneke & H.-W. Wanzlick,Liebigs Ann. Chem. 740, pp. 52-62 (1970).

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