Invention Grant
- Patent Title: Objective lens drive and optical pickup apparatus
- Patent Title (中): 物镜驱动和光学拾取装置
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Application No.: US12258032Application Date: 2008-10-24
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Publication No.: US08111593B2Publication Date: 2012-02-07
- Inventor: Shinichi Sako
- Applicant: Shinichi Sako
- Applicant Address: JP Osaka-shi
- Assignee: Sharp Kabushiki Kaisha
- Current Assignee: Sharp Kabushiki Kaisha
- Current Assignee Address: JP Osaka-shi
- Agency: Morrison & Foerster LLP
- Priority: JP2007-284334 20071031
- Main IPC: G11B7/00
- IPC: G11B7/00

Abstract:
An objective lens drive and an optical pickup apparatus are provided which can be reduced in size. Two tilt coils and two tracking coils are disposed so that among planes defined by the respective coils, a plane perpendicular to a winding direction thereof is parallel to a reference plane defined on a lens holder at a predetermined reference distance or less, and are disposed at such positions as to be symmetrical to each other about a center of gravity of the lens holder. A focus coil is disposed so that among planes defined by the focus coil, a plane perpendicular to a recording surface of an optical disk is parallel to the reference plane at a predetermined reference distance or less relative to the two tilt coils and the two tracking coils.
Public/Granted literature
- US20090108683A1 OBJECTIVE LENS DRIVE AND OPTICAL PICKUP APPARATUS Public/Granted day:2009-04-30
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