- 专利标题: Optical disk device and information recording/reproducing method
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申请号: US10894907申请日: 2004-07-20
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公开(公告)号: US07027378B2公开(公告)日: 2006-04-11
- 发明人: Yoshiaki Komma , Hidenori Wada , Seiji Nishino
- 申请人: Yoshiaki Komma , Hidenori Wada , Seiji Nishino
- 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: Hamre, Schumann, Mueller & Larson, P.C.
- 优先权: JP2000-269805 20000906
- 主分类号: G11B7/00
- IPC分类号: G11B7/00
摘要:
An optical disk device is provided with an optical pickup that includes a convergent optical system having an objective lens for converging a light beam emitted from the laser light source to form a microspot on an optical disk and an aberration correcting optical system for controlling a spherical aberration of the convergent optical system, and performs information recording or reproduction with respect to a multi-layer optical disk having at least a first recording layer and a second recording layer. In the optical disk device, an operation of changing a correction quantity of the spherical aberration from a value adequate for the first recording layer to a predetermined value is started before an operation of moving a focus position of the microspot from the first layer to the second layer is completed. This allows a focus control to be performed stably with respect to the second recording layer in a state in which the spherical aberration correction already has been carried out, thereby preventing the focus control from failing due to an unsuccessful interlayer jump.