发明授权
- 专利标题: Objective lens and optical information recording/reproducing apparatus
- 专利标题(中): 物镜和光信息记录/重放装置
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申请号: US12620804申请日: 2009-11-18
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公开(公告)号: US08121012B2公开(公告)日: 2012-02-21
- 发明人: Satoshi Inoue , Shuichi Takeuchi
- 申请人: Satoshi Inoue , 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: JP2008-295552 20081119; JP2008-295553 20081119
- 主分类号: G11B7/135
- IPC分类号: G11B7/135
摘要:
An optical information recording/reproducing apparatus for an optical disc using a light beam having a wavelength of λ including: an objective lens that converges the light beam onto a recording surface of the optical disc and satisfies a condition: 0.40
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