Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Reexamination Certificate
2007-02-06
2007-02-06
Edun, Muhammad (Department: 2627)
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
C369S044370, C369S047100, C369S112230
Reexamination Certificate
active
10457818
ABSTRACT:
A recording apparatus and method for recording a mark on a recordable recording medium includes an optical pickup having a light source and an objective lens for focusing light emitted from the light source as a light spot on a recording surface of a recording medium. When recording on a rewritable recording medium, the size of the light spot formed on the recording surface of a recording medium is increased more than when recording on a write once recording medium and/or reproducing from a recording medium. Accordingly, when recording on a rewritable recording medium, the size of a light spot is enlarged more than when recording on an only once writable recoding medium and/or reproducing from a recording medium. Thus, when a mark is recorded on the rewritable recording medium, the erasing rate of an existing recorded phase-change mark is increased to improve the overwriting characteristics.
REFERENCES:
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Office Action issued in Japanese Patent Application No. 2003-148247 on Apr. 18, 2006.
Edun Muhammad
Samsung Electronics Co,. Ltd.
Stein, McEwen & Bui LLP
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