发明授权
- 专利标题： Objective lens element
- 专利标题（中）： 物镜元件
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申请号： US13410313申请日： 2012-03-02
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公开(公告)号： US08406110B2公开(公告)日： 2013-03-26
- 发明人: Katsuhiko Hayashi , Yasuhiro Tanaka , Michihiro Yamagata , Yoshiaki Komma
- 申请人： Katsuhiko Hayashi , Yasuhiro Tanaka , Michihiro Yamagata , Yoshiaki Komma
- 申请人地址： JP Kadoma-shi
- 专利权人： Panasonic Corporation
- 当前专利权人： Panasonic Corporation
- 当前专利权人地址： JP Kadoma-shi
- 代理机构： Judge Patent Associates
- 优先权： JP2009-216227 20090917
- 主分类号： G11B7/135
- IPC分类号： G11B7/135
摘要：
An objective lens element having excellent compatibility with optical discs having different base material thicknesses is provided. The objective lens element has optically functional surfaces on an incident side and an exit side. At least either one of the optically functional surfaces on the incident side and the exit side includes a diffraction portion which satisfies at least either one of the following formulas (1) and (2): θ1×θ2
公开/授权文献
- US20120170439A1 Objective Lens Element 公开/授权日：2012-07-05
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