Dynamic information storage or retrieval – Condition indicating – monitoring – or testing – Including radiation storage or retrieval
Reexamination Certificate
2007-10-02
2007-10-02
Tran, Thang V. (Department: 2627)
Dynamic information storage or retrieval
Condition indicating, monitoring, or testing
Including radiation storage or retrieval
C369S044270, C369S112010, C369S094000
Reexamination Certificate
active
10805965
ABSTRACT:
A method for recognizing at least two types of optical discs, which are associated with multiple different numerical apertures, includes the step of setting the numerical aperture of a focusing mechanism equal to a first one of the multiple different numerical apertures. The focusing mechanism is used to focus a light beam on a data storage layer of a given optical disc. The first numerical aperture is smaller than any of the other numerical apertures. The method further includes the step of recognizing the type of the given optical disc by the first numerical aperture that has been selected in the step of setting the numerical aperture.
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Kishimoto Takashi
Shioya Masayoshi
Takahashi Rie
Watanabe Katsuya
Akin Gump Strauss Hauer & Feld & LLP
Matsushita Electric - Industrial Co., Ltd.
Tran Thang V.
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