Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Reexamination Certificate
2007-03-01
2010-06-08
Huber, Paul (Department: 2627)
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
C369S044320, C369S053280, C369S112030
Reexamination Certificate
active
07733749
ABSTRACT:
A beam spot position control device, for controlling multiple beam spot positions irradiated onto an optical recording medium so as to be disposed linearly, includes a light detecting unit for detecting the amount of return light for each of a plurality of beam spots disposed linearly, a tracking control unit for performing tracking control based on tracking error signals of at least one of the beam spots detected with the optical detecting unit, and a rotation control unit for rotating the plurality of beam spots which are disposed linearly, based on the DC offset amount of the tracking error signals of at least two of the beam spots detected with the optical detecting unit.
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Frommer William S.
Frommer & Lawrence & Haug LLP
Huber Paul
Presson Thomas F.
Sony Corporation
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