发明授权
- 专利标题: Lens for an optical disc recording and/or reproducing apparatus
- 专利标题(中): 用于光盘记录和/或复制设备的镜头
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申请号: US731451申请日: 1991-07-17
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公开(公告)号: US5162949A公开(公告)日: 1992-11-10
- 发明人: Shigeo Kubota
- 申请人: Shigeo Kubota
- 申请人地址: JPX Tokyo
- 专利权人: Sony Corporation
- 当前专利权人: Sony Corporation
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX2-191149 19900719
- 主分类号: G02B13/00
- IPC分类号: G02B13/00 ; G02B3/04 ; G02B13/18 ; G02B13/24 ; G11B7/135
摘要:
A single focusing lens for an optical disc recording and/or reproducing apparatus, wherein the lens two aspherical surfaces, has a large numerical aperture of about 0.6, and a focal length and a thickness that satisfy following formulas0.25
公开/授权文献
- US5784398A Optoelectronic component having codirectional mode coupling 公开/授权日:1998-07-21
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