Optical pick-up apparatus and optical information recording and/or reproducing apparatus
    1.
    发明申请
    Optical pick-up apparatus and optical information recording and/or reproducing apparatus 审中-公开
    光学拾取装置和光学信息记录和/或再现装置

    公开(公告)号:US20050180294A1

    公开(公告)日:2005-08-18

    申请号:US11049948

    申请日:2005-02-04

    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, |dM1−M2|, which represents an absolute value of a difference between M1 and M2, satisfies the following relation. |dM1−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λ1的第一波长,λ2的第二波长和λ3的第三波长的第一,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 用于从第一,第二和第三光盘进行再现信息和/或记录信息的物镜光学系统的放大率分别由M1,M2和M3分别表示为M1,M2和M3。 ,其表示M1和M2之间的差的绝对值,满足以下关系。 <?in-line-formula description =“In-line Formulas”end =“lead”?> | d M1-M2 <0.02 <?in-line-formula description =“In-line 公式“end =”tail“?>

    Optical pickup apparatus and objective optical unit
    2.
    发明申请
    Optical pickup apparatus and objective optical unit 审中-公开
    光学拾取装置和物镜光学单元

    公开(公告)号:US20060203692A1

    公开(公告)日:2006-09-14

    申请号:US11366546

    申请日:2006-03-03

    IPC分类号: G11B7/00

    摘要: An optical pickup apparatus includes: a first light source for emitting a first light flux; a second light source for emitting a second light flux; a third light source for emitting a third light flux; and an objective optical unit having a first optical path difference providing structure and a second optical path difference providing structure. Magnifications of the objective optical unit for the first-third light fluxes have almost same value. The first optical path difference providing structure provides a predefined optical path difference and changes a spherical aberration to be one of under-correction and over-correction for all of the first light flux, the second light flux, and the third light flux. The second optical path difference providing structure provides a predefined optical path difference and changes a spherical aberration to be the other of under-correction and over-correction of the spherical aberration only for the second light flux.

    摘要翻译: 一种光学拾取装置包括:用于发射第一光通量的第一光源; 用于发射第二光通量的第二光源; 用于发射第三光通量的第三光源; 以及具有第一光程差提供结构和第二光程差提供结构的物镜光学单元。 用于第一至第三光束的物镜光学单元的放大率具有几乎相同的值。 第一光程差提供结构提供预定的光程差,并且将球面像差改变为对于所有第一光通量,第二光通量和第三光通量的校正和过校正之一。 第二光程差提供结构提供预定的光程差,并且将球面像差改变为仅用于第二光通量的球面像差的校正不足和过校正。

    Objective optical system, optical pickup apparatus and optical disk drive apparatus
    3.
    发明申请
    Objective optical system, optical pickup apparatus and optical disk drive apparatus 审中-公开
    物镜光学系统,光学拾取装置和光盘驱动装置

    公开(公告)号:US20050265151A1

    公开(公告)日:2005-12-01

    申请号:US11135449

    申请日:2005-05-24

    IPC分类号: G11B7/00 G11B7/135

    摘要: An objective optical system for use in an optical pickup apparatus which reproduces and/or records information on an information recording surface of first-third optical disks, the objective optical system includes a first optical element, a first part comprising a material A, a second part comprising a material b, wherein the first part and the second part are laminated on the first optical element in an optical axis of the objective optical system, and the material A and the material B have different Abbe constants for d-line each other and a first phase structure formed on a boundary between the first part and the second part.

    摘要翻译: 一种用于在第一至第三光盘的信息记录表面上再现和/或记录信息的光学拾取装置中的物镜光学系统,所述物镜光学系统包括第一光学元件,包括材料A的第一部分, 包括材料b的部分,其中第一部分和第二部分在物镜光学系统的光轴上层压在第一光学元件上,并且材料A和材料B具有彼此d线的不同的阿贝常数, 形成在第一部分和第二部分之间的边界上的第一相位结构。