发明名称 |
Multilayer optical recording medium and optical pickup device |
摘要 |
A multilayer optical recording medium includes a plurality of recording layers that are laminated and have recording layer forming units into which information is recorded. Reflective film forming units are formed on parts of the respective recording layers and have a reflectance ratio sufficient to make a servo loop of a focus servo into a servo close condition. Reflective film forming units of the respective recording layers are arranged at respectively different positions.
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申请公布号 |
US2005094507(A1) |
申请公布日期 |
2005.05.05 |
申请号 |
US20040967331 |
申请日期 |
2004.10.19 |
申请人 |
PIONEER CORPORATION |
发明人 |
OGASAWARA MASAKAZU |
分类号 |
G11B7/00;G11B7/0033;G11B7/085;G11B7/09;G11B7/125;G11B7/24;(IPC1-7):G11B7/00 |
主分类号 |
G11B7/00 |
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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