发明申请
- 专利标题: Optical pick-up apparatus and divergent angle-converting element
- 专利标题(中): 光学拾取装置和发散角转换元件
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申请号: US10976844申请日: 2004-11-01
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公开(公告)号: US20050094537A1公开(公告)日: 2005-05-05
- 发明人: Kiyono Ikenaka , Shinichiro Saito , Yuichi Atarashi
- 申请人: Kiyono Ikenaka , Shinichiro Saito , Yuichi Atarashi
- 专利权人: KONICA MINOLTA OPTO, INC.
- 当前专利权人: KONICA MINOLTA OPTO, INC.
- 优先权: JPJP2003-374625 20031104; JPJP2003-385526 20031114
- 主分类号: G02B13/00
- IPC分类号: G02B13/00 ; G02B13/18 ; G11B7/00 ; G11B7/125 ; G11B7/135
摘要:
An optical pickup apparatus comprising: a first light source emitting first light flux having wavelength λ1 (380 nm≦λ1≦450 nm); a second light source emitting second light flux having wavelength λ2 (600 nm≦λ2≦700 nm); a third light source emitting third light flux having wavelength λ3 (750 nm≦λ3≦800 nm); a first divergent angle-converting element through which the first light flux passes; a second divergent angle-converting element through which the second light flux and the third light flux pass; and an objective optical element through which the first, second, and third light fluxes pass. Optical magnification m2 of the second divergent angle-converting element for the second light flux and optical magnification m3 of the second divergent angle-converting element for the third light flux are different from each other.
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