发明授权
- 专利标题： Objective lens for optical pick-up
- 专利标题（中）： 物镜用于光学拾取
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申请号： US12103910申请日： 2008-04-16
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公开(公告)号： US08089705B2公开(公告)日： 2012-01-03
- 发明人: Naoki Yamagata , Shuichi Takeuchi
- 申请人： Naoki Yamagata , Shuichi Takeuchi
- 申请人地址： JP Tokyo
- 专利权人： Hoya Corporation
- 当前专利权人： Hoya Corporation
- 当前专利权人地址： JP Tokyo
- 代理机构： Greenblum & Bernstein P.L.C.
- 优先权： JP2007-112814 20070423
- 主分类号： G02B13/18
- IPC分类号： G02B13/18
摘要：
There is provided an objective lens for an optical pick-up. The objective lens includes a first surface on a light source side, and a second surface on an optical disc side. The first surface has a convex shape. The objective lens is formed to be a single-element lens having a numerical aperture of 0.75 or more. In this configuration, the objective lens satisfies a condition: 0.95
公开/授权文献
- US20080259775A1 OBJECTIVE LENS FOR OPTICAL PICK-UP 公开/授权日：2008-10-23
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