发明名称 |
Optical pickup apparatus and optical system for optical pickup apparatus |
摘要 |
This invention is directed to an optical pickup apparatus which includes a first laser source which emits a first beam, a second laser source which emits a second beam having a polarization plane substantially perpendicular to a polarization plane of the first beam, a polarization diffraction element which selectively diffracts one of the first beam and the second beam in accordance with polarized states thereof, and an objective lens which records and/or reproduces information by focusing the first beam which has passed through the polarization diffraction element onto an information recording surface of a first optical information recording medium, and records and/or reproduces information by focusing the second beam which has passed through the polarization diffraction element onto an information recording surface of a second optical information recording medium.
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申请公布号 |
US2004213135(A1) |
申请公布日期 |
2004.10.28 |
申请号 |
US20040827052 |
申请日期 |
2004.04.19 |
申请人 |
KONICA MINOLTA OPTO, INC. |
发明人 |
MORI NOBUYOSHI;KIMURA TOHRU |
分类号 |
G02B5/18;G02B13/18;G11B7/00;G11B7/125;G11B7/135;(IPC1-7):G11B7/135 |
主分类号 |
G02B5/18 |
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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