Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Reexamination Certificate
2011-03-15
2011-03-15
Huber, Paul (Department: 2627)
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
C369S030100
Reexamination Certificate
active
07907480
ABSTRACT:
An optical disk device for recording or reproducing an optical disk has: an objective lens for irradiating a laser beam to the optical disk; an actuator for moving the objective lens in the radial direction of the optical disk; and a spindle motor for rotating the optical disk. After the laser beam irradiated to the optical disk passed through a PID portion of the optical disk, the actuator moves the objective lens in the radial direction of the optical disk at a timing corresponding to a rotational speed. Between signals to drive the actuator, an output time of a deceleration signal is set to a predetermined ratio of a time during which an acceleration signal is outputted. While the deceleration signal is outputted, a light spot passes through the PID portion.
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patent: 6628580 (2003-09-01), Kishimoto et al.
patent: 2004/0141429 (2004-07-01), Kishimoto et al.
patent: 05-205287 (1993-08-01), None
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patent: 2004-342314 (2004-12-01), None
Kataoka Takeyoshi
Suzuki Motoyuki
Hitachi , Ltd.
Hitachi-LG Data Storage, Inc.
Huber Paul
Townsend and Townsend / and Crew LLP
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