AUTHENTICATABLE MEDIA AND METHOD OF AUTHENTICATING
26-05-2006 дата публикации
Номер:
WO2006055293A1
Автор: VAN DE GRAMPEL, Hendrik, T. , MARUVADA, Sriramakrishna , PAI-PARANJAPE, Vandita , POTYRAILO, Radislav, A. , SCHOTTLAND, Philippe , WISNUDEL, Marc, B.
Принадлежит: GENERAL ELECTRIC COMPANY
Контакты:
Номер заявки: US01-04-200532
Дата заявки: 04-11-2005
One method for playing a disk, comprises illuminating a first portion of the optical article with a first laser to obtain a first optical signal, wherein the first laser has a first wavelength, illuminating a second portion with a second laser to obtain a second optical signal, wherein the second laser has a second wavelength that is different from the first wavelength, and determining if the optical article is authentic by comparing the first optical signal and the second optical signal.[0000]
