Dynamic information storage or retrieval – Condition indicating – monitoring – or testing – Including radiation storage or retrieval
Reexamination Certificate
2011-04-26
2011-04-26
Dinh, Tan X (Department: 2627)
Dynamic information storage or retrieval
Condition indicating, monitoring, or testing
Including radiation storage or retrieval
C369S053410
Reexamination Certificate
active
07933182
ABSTRACT:
An information recording and/or reproducing apparatus capable of obtaining a certain recording/reproducing margin with a simplified structure. The apparatus identifies whether an optical disc is a single-layer recording medium having one recording layer, or a multilayer recording medium having a plurality of recording layers, and sets a control range (movable range) of an objective lens on the basis of the identification result. When the optical disc is identified as a multilayer recording medium, the control range of the objective lens is set to be smaller than that for a single-layer recording medium. Further, the control range of the objective lens is set for each of the recording layers of the optical disc.
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Canon Kabushiki Kaisha
Dinh Tan X
Fitzpatrick ,Cella, Harper & Scinto
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