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1. 发明申请

US20080049566A1 OPTICAL PICKUP DEVICE 失效
标题翻译：光学拾取器件
公开(公告)号：US20080049566A1
公开(公告)日：2008-02-28
申请号：US11763163
申请日：2007-06-14
申请人： Shinichi HAMAGUCHI , Naoki NAKANISHI , Tatsuya NAKAMORI , Naoto SHIMADA
发明人： Shinichi HAMAGUCHI , Naoki NAKANISHI , Tatsuya NAKAMORI , Naoto SHIMADA
IPC分类号： G11B7/00
CPC分类号： G11B7/1353 , G11B7/123 , G11B7/1275 , G11B7/131 , G11B2007/0006
摘要： The optical pickup device according to the present invention includes: a light source which emits light at first, second and third wavelengths; an optical path combining unit which combines vectors of the light at the first, second and third wavelengths which is emitted by the light source, and matches optical axes of the light at the first wavelength and the light at the third wavelength; a light condensing unit which condenses the light from the optical path combining unit onto the optical information storage medium; a diffraction element which diffracts light at the first, second and third wavelength which is reflected from the optical information storage medium, in a first direction and a second direction respectively; a first photo detector which receives light at the first, second and third wavelength that is diffracted in the first direction by the diffraction element; a second photo detector which receives light at the first and third wavelength that is diffracted in the second direction by the diffraction element; and a third photo detector which receives light at the second wavelength that is diffracted in the second direction by the diffraction element.
摘要翻译：根据本发明的光拾取装置包括：以第一，第二和第三波长发光的光源; 光路组合单元，其组合由所述光源发射的所述第一，第二和第三波长的光的矢量，并且匹配所述第一波长的光的光轴和所述第三波长的光; 聚光单元，其将来自光路组合单元的光聚合到光学信息存储介质上; 衍射元件，其在第一方向和第二方向上分别衍射从光信息存储介质反射的第一，第二和第三波长的光; 第一光电检测器，其接收由衍射元件沿第一方向衍射的第一，第二和第三波长的光; 第二光检测器，其通过衍射元件接收在第二方向衍射的第一和第三波长的光; 以及第三光电检测器，其接收由衍射元件沿第二方向衍射的第二波长的光。

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