摘要 |
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. |
申请人 |
GENERAL ELECTRIC COMPANY;VAN DE GRAMPEL, HENDRIK, T.;MARUVADA, SRIRAMAKRISHNA;PAI-PARANJAPE, VANDITA;POTYRAILO, RADISLAV, A.;SCHOTTLAND, PHILIPPE;WISNUDEL, MARC, B. |
发明人 |
VAN DE GRAMPEL, HENDRIK, T.;MARUVADA, SRIRAMAKRISHNA;PAI-PARANJAPE, VANDITA;POTYRAILO, RADISLAV, A.;SCHOTTLAND, PHILIPPE;WISNUDEL, MARC, B. |