发明名称 |
Optical disk apparatus having tracking control for positioning a light beam along a track on an optical disk |
摘要 |
An apparatus of the present invention is an optical disk apparatus for irradiating a track on an information carrier on which information is recorded with a light beam so as to reproduce information from the track. The optical disk apparatus includes: a tracking error detector for detecting a tracking error signal representing a displacement between the light beam and the track; a fine movement section for moving the light beam in a substantially radial direction of the information carrier; a coarse movement section for moving the fine movement section in the substantially radial direction of the information carrier; a tracking controller for controlling the fine movement section and the coarse movement section based on the tracking error signal detected by the tracking error detector so that the light beam is positioned along the track; and an eccentricity detector for detecting an amount of eccentricity of the track on the information carrier. The tracking controller controls the coarse movement section based on the amount of eccentricity detected by the eccentricity detector.
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申请公布号 |
US6396779(B1) |
申请公布日期 |
2002.05.28 |
申请号 |
US19990417184 |
申请日期 |
1999.10.12 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD |
发明人 |
FUJIUNE KENJI;MORIYA MITSUROU;KANDA YOSHIHIRO;KUZE YUUICHI |
分类号 |
G11B7/085;G11B7/09;G11B7/095;(IPC1-7):G11B7/00 |
主分类号 |
G11B7/085 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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