Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Reexamination Certificate
2005-08-12
2009-11-24
Huber, Paul (Department: 2627)
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
C369S044370
Reexamination Certificate
active
07623435
ABSTRACT:
A sufficient S/N ratio in reproduction of an optical disk is achieved without complexing a circuit structure even if a data recording speed relative to the optical disk is increased. When data is recorded into an optical disk (DK), in an information recording and reproduction device (RP), both a first light beam and a second light beam are emitted at the same time. A sub-actuator section (20) is provided in addition to a main actuator (15) for correcting the displacement of light collecting spots caused by the displacement between the optical axis of the first beam and the optical axis of the second beam. Only the optical axis of the second light beam is adjusted by the sub-actuator section (20).
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Sano Fumihiko
Yanagawa Naoharu
Drinker Biddle & Reath LLP
Huber Paul
Pioneer Corporation
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