发明授权
- 专利标题: Optical disc drive
- 专利标题(中): 光盘驱动器
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申请号: US10499226申请日: 2003-01-20
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公开(公告)号: US07307933B2公开(公告)日: 2007-12-11
- 发明人: Kenji Fujiune , Katsuya Watanabe , Shin-ichi Yamada , Yuuichi Kuze , Kenji Kondo
- 申请人: Kenji Fujiune , Katsuya Watanabe , Shin-ichi Yamada , Yuuichi Kuze , Kenji Kondo
- 申请人地址: JP Osaka
- 专利权人: Matsushita Electric Industrial Co., Ltd.
- 当前专利权人: Matsushita Electric Industrial Co., Ltd.
- 当前专利权人地址: JP Osaka
- 代理机构: Akin Gump Strauss Hauer & Feld LLP
- 优先权: JP2002-013871 20020123
- 国际申请: PCT/JP03/00447 WO 20030120
- 国际公布: WO03/063150 WO 20030731
- 主分类号: G11B7/125
- IPC分类号: G11B7/125 ; G11B7/09
摘要:
An optical disc drive according to the present invention reads and/or writes data from/on an optical disc having at least one information layer with a light beam and includes: a spherical aberration detecting section for generating a spherical aberration signal representing a spherical aberration produced at a focal point of the light beam on the information layer of the disc; a spherical aberration changing section for changing the spherical aberration; a spherical aberration regulating section for generating an aberration correction signal to correct the spherical aberration by driving the changing section; and means for detecting a value of the aberration correction signal that minimizes the spherical aberration when the focal point of the light beam is located on the information layer of the disc and for detecting the depth of the information layer, which corresponds to a distance from the information layer on which the focal point of the light beam is located to the surface of the disc, based on the value.
公开/授权文献
- US20050083798A1 Optical disc unit 公开/授权日:2005-04-21