Method and apparatus for determining if an optical disk...

Image analysis – Applications – Manufacturing or product inspection

Reexamination Certificate

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C382S108000, C382S237000

Reexamination Certificate

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07372986

ABSTRACT:
A method and apparatus for determining if an optical disk originated from a valid source, the method and apparatus scanning one major surface of the optical disk for mechanical surface imperfections, storing the locations of the surface imperfections relative to a datum, comparing a parameter of each of the locations of the surface imperfections with corresponding parameters of a master disk of known source for determining if the disk originated from the source from which the master disk originated.

REFERENCES:
patent: 5412718 (1995-05-01), Narasimhalu et al.
patent: 5566159 (1996-10-01), Shapira
patent: 5615061 (1997-03-01), Singh
patent: 5703858 (1997-12-01), Mitchell et al.
patent: 5790247 (1998-08-01), Henley et al.
patent: 5796487 (1998-08-01), Guerra
patent: 5796546 (1998-08-01), Sasamoto et al.
patent: 6654053 (2003-11-01), Hwang
patent: 2003/0112446 (2003-06-01), Miller et al.

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