Actuator used with an optical pickup having plate coils and...

Details Actuator used with an optical pickup having plate coils and... Actuator used with an optical pickup having plate coils and...

2005-02-15

2005-02-15

Miller, Brian E. (Department: 2652)

Dynamic optical information storage or retrieval

Dynamic mechanism optical subsystem

Transducer carriage or actuator

C369S044220, C359S814000

Reexamination Certificate

active

06857127

ABSTRACT:
An actuator used with an optical pickup to drive a blade, on which an objective lens is mounted, in focusing and tracking directions, includes a pair of magnets installed on a base, and a plate coil installed in the blade to be placed between the magnets. Each magnet has a shape in which N and S poles of the magnet are alternately magnetized in four regions asymmetrically split vertically and horizontally. In this structure, the actuator used with an optical pickup can be less affected by sensitivity variations when the blade is displaced, and the size of the electromagnetic driving unit can be reduced by reducing the number of magnetized gaps formed in the magnet.

REFERENCES:
patent: 5128806 (1992-07-01), Ohno
patent: 5663840 (1997-09-01), Matsui
patent: 6344936 (2002-02-01), Santo et al.
patent: 6628601 (2003-09-01), Kobayashi
patent: 6741543 (2004-05-01), Suzuki et al.
patent: 1 098 304 (2001-05-01), None
patent: 5-258326 (1993-10-01), None
patent: 8-102076 (1996-04-01), None

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