Objective lens drive device and optical head device

Details Objective lens drive device and optical head device Objective lens drive device and optical head device

2005-03-07

2008-10-21

Miller, Brian E (Department: 2627)

Dynamic optical information storage or retrieval

Dynamic mechanism optical subsystem

Transducer carriage or actuator

C369S044150

Reexamination Certificate

active

07441258

ABSTRACT:
An objective lens drive device includes a drive mechanism for driving a lens holder at least in a focusing direction and a tracking direction. The drive mechanism includes a drive magnet provided with a magnetized opposing face in which different magnetic poles are disposed to be adjacent to each other via a magnetic pole boundary portion formed in a roughly U-shape. The drive mechanism also includes a tilt drive coil for driving the lens holder in a tilt direction and the tilt drive coil is opposedly disposed to the magnetized opposing face at a position where the tilt drive coil overlaps with at least a focusing drive coil or a tracking drive coil in a direction in which the focusing drive coil and the tracking drive coil face the magnetized opposing face.

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