Optical pick-up apparatus and optical information recording and/or reproducing apparatus
    1.
    发明公开
    Optical pick-up apparatus and optical information recording and/or reproducing apparatus 审中-公开
    OptischesAbtastgerätund optisches Informationsaufzeichnungs- und / oder-wiedergabegerät

    公开(公告)号:EP1562187A2

    公开(公告)日:2005-08-10

    申请号:EP05250597.1

    申请日:2005-02-03

    IPC分类号: G11B7/135

    摘要: An optical pickup apparatus comprising: a first, second and third light sources emitting first, second and third light flux having first wavelength of λ1, second wavelength of λ2 and third wavelength of λ3, respectively; and an objective optical system converging the first, second and third light fluxes onto an information recording surface of a first, second and third optical disk, respectively, wherein the objective optical system has a phase structure, and wherein when a first, second and third magnifications of the objective optical system for conducting reproducing information from and/or recording information on the first, second and third optical disks are represented by M1, M2, and M3, respectively, |d M1-M2 |, which represents an absolute value of a difference between M1 and M2, satisfies the following relation. d M1-M2

    摘要翻译: 一种光学拾取装置,包括:第一,第二和第三光源,分别发射具有第一波长»1,第二波长»2和第三波长»3的第一,第二和第三光束; 以及物镜光学系统,其将所述第一,第二和第三光束分别聚焦到第一,第二和第三光盘的信息记录表面上,其中所述物镜光学系统具有相位结构,并且其中当第一,第二和第三光束 用于在第一,第二和第三光盘上进行再现信息和/或记录信息的物镜光学系统的放大率分别由M1,M2和M3分别表示,其表示绝对值 M1和M2之间的差异满足以下关系。

    Objective lens and optical pickup apparatus
    5.
    发明公开
    Objective lens and optical pickup apparatus 有权
    物镜和光学拾取装置

    公开(公告)号:EP1587090A1

    公开(公告)日:2005-10-19

    申请号:EP05102759.7

    申请日:2005-04-07

    IPC分类号: G11B7/135

    摘要: An optical pickup apparatus includes: a first light source for emitting a first light flux with a wavelength λ1 for recording and/or reproducing information on a first optical disc having a protective substrate with a thickness t1; a third light source for emitting a third light flux with a wavelength λ3 for recording and/or reproducing information on a third optical disc having a protective substrate with a thickness t3; and an objective lens arranged in a common optical path of the first light flux and the third light flux when the optical pickup apparatus records and/or reproduces information on each of the first and third optical discs, wherein the first light flux enters into the objective lens as a converging light flux, and a magnification m3 of the objective lens for a third light flux satisfies -1/10 ≤ m3

    摘要翻译: 一种光学拾取装置包括:第一光源,用于发射具有波长λ1的第一光通量,用于在具有厚度t1的保护基板的第一光盘上记录和/或再现信息; 第三光源,用于发射具有波长λ3的第三光束,用于在具有厚度为t3的保护基底的第三光盘上记录和/或再现信息; 以及当光学拾取装置在第一和第三光盘中的每一个上记录和/或再现信息时,布置在第一光通量和第三光通量的公共光路中的物镜,其中第一光通量进入物镜 透镜作为会聚光束,第三光束的物镜的放大率m3满足-1 /10≤m3<0。