Invention Grant
- Patent Title: Optical pickup apparatus and objective optical element
- Patent Title (中): 光学拾取装置和物镜光学元件
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Application No.: US12533070Application Date: 2009-07-31
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Publication No.: US07957231B2Publication Date: 2011-06-07
- Inventor: Tohru Kimura , Yuichi Atarashi , Kiyono Ikenaka , Kenji Ogiwara , Eiji Nomura
- Applicant: Tohru Kimura , Yuichi Atarashi , Kiyono Ikenaka , Kenji Ogiwara , Eiji Nomura
- Applicant Address: JP Tokyo
- Assignee: Konica Minolta Opto, Inc.
- Current Assignee: Konica Minolta Opto, Inc.
- Current Assignee Address: JP Tokyo
- Agency: Finnegan, Henderson, Farabow, Garrett & Dunner, L.L.P.
- Priority: JP2004-268217 20040915; JP2004-296782 20041008; JP2004-297592 20041012
- Main IPC: G11B7/00
- IPC: G11B7/00
Abstract:
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.
Public/Granted literature
- US20090290474A1 OPTICAL PICKUP APPARATUS AND OBJECTIVE OPTICAL ELEMENT Public/Granted day:2009-11-26
Information query
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