Optical head device for an optical disk apparatus reading...

Details Optical head device for an optical disk apparatus reading... Optical head device for an optical disk apparatus reading...

2007-04-10

2007-04-10

Davis, David (Department: 2627)

Dynamic optical information storage or retrieval

Dynamic mechanism optical subsystem

Transducer carriage or actuator

Reexamination Certificate

active

10448358

ABSTRACT:
An optical head device for an optical disk apparatus for optically reading and writing information by irradiating a light spot onto an information recording surface of an optical recording medium, which is capable of moving an objective lens to a predetermined position even when part of the drive coil is included in an neutral area n in the vicinity of the magnetic boundary. There are provided two driving force generating units, including two magnets50aand50bdisposed in the tangential direction of an optical disk separately on the opposite sides of an objective lens10, and coil units60aand60bfor generating the driving force directed against the magnets50aand50bdisposed on a lens holder20, and the magnets50aand50band the coil units60aand60bare arranged in such a manner that the driving force other than the driving force generated for tracking movement and the moment act against each other at the two driving force generating units.

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patent: 2002/0054559 (2002-05-01), Choi
patent: 2001-229555 (2001-08-01), None

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