发明名称 |
Optical pickup apparatus and objective optical element |
摘要 |
A light flux from the first light source forms a converged spot on first optical information recording medium by only a refraction action of the aspheric surface, or by a combination of the refraction action and an optical action given by at least one of the first phase structure and the second phase structure, a light flux from the second light source forms a converged spot on second optical recording medium by a combination of a refraction action of the aspheric surface and an optical action given by at least one of the first phase structure and the second phase structure, and a light flux from the third light source forms a converged spot on third optical recording medium by a combination of a refraction action of the aspheric surface and an optical action given by at least one of the first phase structure and the second phase structure.
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申请公布号 |
US7821904(B2) |
申请公布日期 |
2010.10.26 |
申请号 |
US20050222137 |
申请日期 |
2005.09.09 |
申请人 |
KONICA MINOLTA OPTO, INC. |
发明人 |
KIMURA TOHRU;ATARASHI YUICHI;IKENAKA KIYONO;OGIWARA KENJI;NOMURA EIJI |
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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