Optical pickup apparatus and objective lens
    2.
    发明公开
    Optical pickup apparatus and objective lens 审中-公开
    Optische Aufnahmevorrichtung und Objektivlinse

    公开(公告)号:EP2287841A2

    公开(公告)日:2011-02-23

    申请号:EP10011847.0

    申请日:2001-10-26

    IPC分类号: G11B7/135

    摘要: An objective lens for use in an optical pickup apparatus having a first light source to emit a light flux having a wavelength λ1, a second light source to emit a light flux having a wavelength λ2 (λ1

    摘要翻译: 一种用于具有发射具有波长»1的光束的第一光源(111)的光学拾取装置的物镜,用于发射具有波长»2(λ1)的光束的第二光源(112) (2),以及包括物镜(160)的聚光光学系统,所述光学拾取装置通过使用所述第一记录介质(200)记录和/或再现包括具有厚度t1的第一透明基板的第一记录介质 光源和聚光光学系统; 并且光学拾取装置通过使用第二光源和聚光光学系统来记录和/或再现包括具有厚度t2的第二透明基板的第二记录介质的信息; 所述物镜包括至少两种光学表面区域,所述至少两种光学表面区域在至少一个表面的有效直径内的光轴的顺序包括垂直于所述光轴的方向; 以及形成在所述一个侧表面上的最外侧光学表面区域上的衍射结构,使得当记录或再现用于所述第一光学信息记录介质的信息时,已经通过所述最外侧光学表面的光束的温度特性被连接; 其中所述物镜是具有正折射率的塑料透镜; 其特征在于,通过包含所述一个侧表面上的光轴的光学面区域的光束,在记录或再现所述第一光学信息记录介质的信息时,在信息记录面上形成点,通过所述光学面区域的光束包括 当记录或再现用于第二光学信息记录介质的信息时,一侧表面上的光轴在信息记录表面上形成一个点。

    Optical pickup apparatus and information recording/reproducing method

    公开(公告)号:EP1369856A3

    公开(公告)日:2005-01-05

    申请号:EP03017931.1

    申请日:2000-01-18

    IPC分类号: G11B7/125 G11B7/135

    摘要: An optical pickup apparatus for reproducing information from an optical information recording medium or for recording information onto an optical information recording medium, is provided with a first light source for emitting first light flux having a first wavelength; a second light source for emitting second light flux having a second wavelength, the first wavelength being different from the second wavelength; a converging optical system having an optical axis and a diffractive portion, and a photo detector; wherein in case that the first light flux passes through the diffractive portion to generate at least one diffracted ray, an amount of n-th ordered diffracted ray of the first light flux is greater than that of any other ordered diffracted ray of the first light flux, and in case that the second light flux passes through the diffractive portion to generate at least one diffracted ray, an amount of n-th ordered diffracted ray of the second light flux is greater than that of any other ordered diffracted ray of the second light flux, where n stands for an integer other than zero.

    Optical pickup apparatus and information recording/reproducing method
    7.
    发明公开
    Optical pickup apparatus and information recording/reproducing method 有权
    光学拾取装置和信息记录/再现方法

    公开(公告)号:EP1381035A3

    公开(公告)日:2005-01-05

    申请号:EP03017932.9

    申请日:2000-01-18

    IPC分类号: G11B7/125 G11B7/135

    摘要: An optical pickup apparatus for reproducing information from an optical information recording medium or for recording information onto an optical information recording medium, is provided with a first light source for emitting first light flux having a first wavelength; a second light source for emitting second light flux having a second wavelength, the first wavelength being different from the second wavelength; a converging optical system having an optical axis and a diffractive portion, and a photo detector; wherein in case that the first light flux passes through the diffractive portion to generate at least one diffracted ray, an amount of n-th ordered diffracted ray of the first light flux is greater than that of any other ordered diffracted ray of the first light flux, and in case that the second light flux passes through the diffractive portion to generate at least one diffracted ray, an amount of n-th ordered diffracted ray of the second light flux is greater than that of any other ordered diffracted ray of the second light flux, where n stands for an integer other than zero.

    摘要翻译: 一种用于从光学信息记录介质再现信息或用于将信息记录到光学信息记录介质上的光学拾取装置,设置有:第一光源,用于发射具有第一波长的第一光通量; 第二光源,用于发射具有第二波长的第二光通量,所述第一波长不同于所述第二波长; 具有光轴和衍射部分的会聚光学系统,以及光检测器; 其中,在所述第一光通量通过所述衍射部分以产生至少一条衍射光线的情况下,所述第一光通量的n阶衍射光线的量大于所述第一光通量的任何其他阶阶衍射光线的量 ,并且在第二光通量通过衍射部分以产生至少一个衍射光线的情况下,第二光通量的n阶衍射光线的量大于第二光线的任何其他阶衍射光线的量 通量,其中n代表非零整数。