发明授权
- 专利标题: Optical information recording/reproducing device and objective lens for the same
- 专利标题(中): 光信息记录/再现装置和物镜相同
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申请号: US11873105申请日: 2007-10-16
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公开(公告)号: US07778139B2公开(公告)日: 2010-08-17
- 发明人: Daisuke Koreeda , Shuichi Takeuchi
- 申请人: Daisuke Koreeda , 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: JP2006-282104 20061017
- 主分类号: G11B7/135
- IPC分类号: G11B7/135
摘要:
There is provided an objective lens used for an optical information recording/reproducing device for recording information to and/or reproducing information from two types of optical discs, by selectively using one of two types of substantially collimated light beams including first and second light beams. When wavelengths of the first and second light beams are respectively represented by λ1 (nm) and λ2 (nm), λ1
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