发明名称 |
Optical pickup device and recording/reproduction device |
摘要 |
An optical pickup device includes: a first light source for emitting recording laser light; a second light source for emitting reproducing laser light having a wavelength different from a wavelength of the recording laser light; an objective lens for converging the recording laser light and the reproducing laser light. A quarter wavelength plate is disposed between the first light source and the second light source, and the objective lens. A wavelength-selective polarized beam splitter is disposed between the quarter wavelength plate, and the first light source and the second light source. The reproducing laser light alone out of the recording laser light and the reproducing laser light reflected on recording medium is guided to a photodetector. |
申请公布号 |
US8238221(B2) |
申请公布日期 |
2012.08.07 |
申请号 |
US20090541685 |
申请日期 |
2009.08.14 |
申请人 |
NAKATANI MORIO;NAGATOMI KENJI;MATSUMURA YOSHIYUKI;TAKAHASHI SEIICHIRO;SANYO ELECTRIC CO., LTD. |
发明人 |
NAKATANI MORIO;NAGATOMI KENJI;MATSUMURA YOSHIYUKI;TAKAHASHI SEIICHIRO |
分类号 |
G11B7/00;G11B7/125 |
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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