发明申请
- 专利标题： OPTICAL PICKUP APPARATUS AND OBJECTIVE OPTICAL ELEMENT
- 专利标题（中）： 光学拾取装置和目标光学元件
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申请号： US12533070申请日： 2009-07-31
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公开(公告)号： US20090290474A1公开(公告)日： 2009-11-26
- 发明人: Tohru Kimura , Yuichi Atarashi , Kiyono Ikenaka , Kenji Ogiwara , Eiji Nomura
- 申请人： Tohru Kimura , Yuichi Atarashi , Kiyono Ikenaka , Kenji Ogiwara , Eiji Nomura
- 专利权人： Konica Minolta Opto, Inc.
- 当前专利权人： Konica Minolta Opto, Inc.
- 优先权： JP2004-268217 20040915; JP2004-296782 20041008; JP2004-297592 20041012
- 主分类号： G11B7/135
- IPC分类号： G11B7/135
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.
公开/授权文献
- US07957231B2 Optical pickup apparatus and objective optical element 公开/授权日：2011-06-07
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