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: US09672847申请日: 2000-09-28
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公开(公告)号: US06344936B1公开(公告)日: 2002-02-05
- 发明人: Takeo Santo , Masanari Mohri , Hiroshi Yamamoto , Kanji Wakabayashi
- 申请人: Takeo Santo , Masanari Mohri , Hiroshi Yamamoto , Kanji Wakabayashi
- 优先权: JP11-276815 19990929
- 主分类号: G02B702
- IPC分类号: G02B702
摘要:
An objective lens driving apparatus is improved in a tracking drive sensitivity, and is capable of suppressing the occurrence of a tilt when a moving member is driven for tracking and focusing motions. To achieve this, the objective lens driving apparatus comprises: a substantially rectangularly shaped focusing coil and a substantially rectangularly shaped tracking coil, both arranged in the same plane, and fixed to a lens holder to drive the lens holder on which an objective lens is held; and a magnet having mutually opposite magnetic poles arranged at positions opposite winding portions of the focusing coil which lie on two sides thereof extending perpendicularly to a focusing direction, and also having mutually opposite magnetic poles arranged at positions opposite winding portions of the tracking coil which lie on two sides thereof extending perpendicularly to a tracking direction.
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