发明授权
- 专利标题: Objective lens driving apparatus
- 专利标题(中): 物镜驱动装置
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申请号: US10824381申请日: 2004-04-15
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公开(公告)号: US06888689B2公开(公告)日: 2005-05-03
- 发明人: Keiji Nakamura , Mitoru Yabe
- 申请人: Keiji Nakamura , Mitoru Yabe
- 申请人地址: JP Tokyo
- 专利权人: Mitsubishi Denki Kabushiki Kaisha
- 当前专利权人: Mitsubishi Denki Kabushiki Kaisha
- 当前专利权人地址: JP Tokyo
- 代理机构: Birch, Stewart, Kolasch & Birch, LLP
- 优先权: JP2002-075786 20020319
- 主分类号: G11B7/09
- IPC分类号: G11B7/09 ; G02B7/02 ; G11B7/00
摘要:
An objective lens driving apparatus includes a lens holder 1 that holds an objective lens 2, and a stationary base 9 that supports the lens holder 1 by a support shaft 3 parallel to an optical axis of the objective lens 2. A stationary yoke 11 and the magnet 8 are mounted to the stationary base 9. A focusing coil 4 and the tracking coils 5a and 5b are mounted to the lens holder 1. The interaction between the current in the focusing coil 4 and the magnetic field caused by the magnet 8 generates an electromagnetic force that moves the lens holder 1 along the support shaft 3. The interaction between the current in the tracking coils 5a and 5b and the magnetic field caused by the magnet 8 generates an electromagnetic force that rotates the lens holder 1 about the support shaft 3.
公开/授权文献
- US20040190163A1 Objective lens driving apparatus 公开/授权日:2004-09-30
信息查询
IPC分类: