发明申请
- 专利标题: Optical Pickup Device
- 专利标题(中): 光学拾取装置
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申请号: US12146883申请日: 2008-06-26
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公开(公告)号: US20090016194A1公开(公告)日: 2009-01-15
- 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
- 优先权: JP2007-184859 20070713
- 主分类号: G11B7/00
- IPC分类号: G11B7/00
摘要:
An optical pickup device includes a first light source emitting first light with a first wavelength, a second light source emitting second light with a second wavelength, a third light source emitting third light with a third wavelength, an objective lens having a step structure, the objective lens being disposed to satisfy predetermined conditions, at least one first coupling lens making the first light and the second light incident onto the objective lens as converged light, a second coupling lens making the third light incident onto the objective lens as diverging light, and a liquid crystal aberration correcting element.
公开/授权文献
- US07990831B2 Optical pickup device 公开/授权日:2011-08-02
信息查询
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