Dynamic information storage or retrieval – Condition indicating – monitoring – or testing – Including radiation storage or retrieval
Reexamination Certificate
2011-03-29
2011-03-29
Chow, Lixi (Department: 2627)
Dynamic information storage or retrieval
Condition indicating, monitoring, or testing
Including radiation storage or retrieval
C369S053420
Reexamination Certificate
active
07916596
ABSTRACT:
Provided is an optical disc device for reading a signal recorded on an optical disc medium, which detects surface reflection at a surface of the optical disc medium, a fake signal generated based on the surface reflection, and light reflected by a data recording layer of the optical disc medium while an objective lens is moved relative to the surface of the optical disc medium, and discriminates a type of the optical disc medium based on a ratio of a first time period between an instant when the surface reflection is detected and an instant when the fake signal is detected, and a second time period between the instant when the surface reflection is detected and an instant when light reflected by the data recording layer is detected.
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Chow Lixi
Katten Muchin & Rosenman LLP
Sony Computer Entertainment Inc.
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