发明名称 |
Optical disc device and focus control method |
摘要 |
A focus control section first performs a reference focus control process in which a reference optical beam is focused on a reference layer of an optical disc according to the result of receiving a reference reflection optical beam, and then switches from the reference focus control process to an information focus control process in which an information optical beam is focused on a mark layer of the optical disc according to the result of receiving an information reflection optical beam.
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申请公布号 |
EP2105925(A1) |
申请公布日期 |
2009.09.30 |
申请号 |
EP20090156144 |
申请日期 |
2009.03.25 |
申请人 |
SONY CORPORATION |
发明人 |
MIYAMOTO, HIROTAKA;SAITO, KIMIHIRO;HORIGOME, TOSHIHIRO;HAYASHI, KUNIHIKO |
分类号 |
G11B7/085;G11B7/00;G11B7/0045;G11B7/0065;G11B7/09;G11B7/125;G11B7/135;G11B7/24 |
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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