发明名称 |
Optical pickup, optical disk drive device, optical information recording device, and optical information reproduction device |
摘要 |
An optical pickup, an optical disk drive device, an optical information recording device, and an optical information reproduction device in which a reproduction signal, a focus error signal, and a gap error signal can be detected with high accuracy when information is recorded/reproduced on/from an optical information medium having a plurality of information recording layers.
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申请公布号 |
US8437239(B2) |
申请公布日期 |
2013.05.07 |
申请号 |
US201113521549 |
申请日期 |
2011.01.12 |
申请人 |
MATSUZAKI KEIICHI;SANO KOUSEI;PANASONIC CORPORATION |
发明人 |
MATSUZAKI KEIICHI;SANO KOUSEI |
分类号 |
G11B7/00;G11B7/1372;G11B7/1374;G11B7/1387 |
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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