发明名称 |
Optical pickup device and optical disk apparatus |
摘要 |
A half-wave plate is attached to a lens holder to integrally drive a collimator lens and the half-wave plate. When the lens holder is moved to a servo position, the half-wave plate is inserted in and retracted from an optical path of a laser beam. Therefore, the laser beam is formed in S-polarized light or P-polarized light with respect to a polarization beam splitter, and the laser beam is guided to a first objective lens or a second objective lens.
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申请公布号 |
US7801011(B2) |
申请公布日期 |
2010.09.21 |
申请号 |
US20080024278 |
申请日期 |
2008.02.01 |
申请人 |
SANYO ELECTRIC CO., LTD.;TOKYO OPTEC DESIGN CO., LTD. |
发明人 |
NAGATOMI KENJI;KANO YASUYUKI |
分类号 |
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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