Objective lens for optical pick-up
    31.
    发明授权
    Objective lens for optical pick-up 有权
    物镜用于光学拾取

    公开(公告)号:US08223442B2

    公开(公告)日:2012-07-17

    申请号:US12021516

    申请日:2008-01-29

    CPC classification number: G11B7/13922 G11B7/1374

    Abstract: There is provided an objective lens for an optical pick-up. The objective lens is formed to be a single-element plastic lens having a first surface and a second surface. The first surface is configured to have, within an effective diameter, an inflection point at which a second derivative of a sag of the first surface takes a value of 0. Further, the objective lens having a numerical aperture larger than or equal to 0.75.

    Abstract translation: 提供了用于光学拾取器的物镜。 物镜形成为具有第一表面和第二表面的单元塑料透镜。 第一表面被配置为在有效直径内具有第一表面的下垂的二次导数取值为0的拐点。此外,具有大于或等于0.75的数值孔径的物镜。

    Optical information recording/reproducing apparatus and objective optical system for the same
    32.
    发明授权
    Optical information recording/reproducing apparatus and objective optical system for the same 失效
    光信息记录/再现装置和物镜光学系统相同

    公开(公告)号:US08189448B2

    公开(公告)日:2012-05-29

    申请号:US12949023

    申请日:2010-11-18

    Abstract: An objective optical system for an optical information recording/reproducing apparatus for recording/reproducing for first, second and third optical discs by selectively using three types of substantially collimated light beams including first, second and third light beams respectively having first, second and third wavelengths, wherein at least one of optical surfaces of the objective optical system comprises a diffraction surface having a diffraction structure, the diffraction surface includes a first region defined by first and second optical path difference functions, a second region defined by at least one type of optical path difference function, and a third region defined by at least one type of optical path difference function, the first region satisfies a condition: −0.15

    Abstract translation: 一种用于光信息记录/再现装置的物镜光学系统,用于通过选择性地使用分别具有第一,第二和第三波长的第一,第二和第三光束的三种基本上准直的光束来记录/再现第一,第二和第三光盘 其中所述物镜光学系统的至少一个光学表面包括具有衍射结构的衍射表面,所述衍射表面包括由第一和第二光程差函数限定的第一区域,由至少一种类型的光学 路径差分函数和由至少一种类型的光程差函数定义的第三区域,第一区域满足条件:-0.15

    Optical pickup device
    35.
    发明授权
    Optical pickup device 有权
    光学拾取装置

    公开(公告)号:US07990831B2

    公开(公告)日:2011-08-02

    申请号:US12146883

    申请日:2008-06-26

    Abstract: An optical pickup device includes a first light source emitting first light with a first wavelength, a second light source emitting second light with a second wavelength, a third light source emitting third light with a third wavelength, an objective lens having a step structure, the objective lens being disposed to satisfy predetermined conditions, at least one first coupling lens making the first light and the second light incident onto the objective lens as converged light, a second coupling lens making the third light incident onto the objective lens as diverging light, and a liquid crystal aberration correcting element.

    Abstract translation: 一种光学拾取装置包括:发射具有第一波长的第一光的第一光源,发射具有第二波长的第二光的第二光源;发射具有第三波长的第三光的第三光源;具有阶梯结构的物镜; 将物镜设置为满足预定条件,使作为会聚光入射到物镜上的第一光和第二光的至少一个第一耦合透镜,使作为发散光入射到物镜上的第三光的第二耦合透镜,以及 液晶像差校正元件。

    Optical information recording /reproducing device and objective lens for the same
    39.
    发明授权
    Optical information recording /reproducing device and objective lens for the same 有权
    光信息记录/再现装置和物镜相同

    公开(公告)号:US07843792B2

    公开(公告)日:2010-11-30

    申请号:US11765498

    申请日:2007-06-20

    CPC classification number: G11B7/1374 G11B7/1353 G11B2007/0006

    Abstract: There is provided an objective lens including a first optical member and a second optical member which are made of materials different from each other and are cemented together at a cementing surface. The cementing surface includes a first phase shift structure having a plurality of refractive surface zones concentrically formed about an optical axis of the objective lens. The first phase shift structure satisfies conditions (1) and (2): 0.85

    Abstract translation: 提供了一种包括第一光学构件和第二光学构件的物镜,其由彼此不同的材料制成并且在固结表面处粘合在一起。 固定表面包括具有围绕物镜的光轴同心地形成的多个折射表面区的第一相移结构。 第一相移结构满足条件(1)和(2):0.85 <Φ2/Φ1<1.15(1)0.10 <|(Φ3-Φ2)/Φ1| <0.50(2)其中Φ1= m(λ1)× λ1/(n2(λ1)-n1(λ1))),Φ2= m(λ2)×(λ2/(n2(λ2)-n1(λ2))),Φ3= m(λ3)×(λ3/(n2 (λ3)-n1(λ3))),m(λ1),m(λ2)和m(λ3)分别为第一至第三光束的衍射效率最大化的衍射级,n1(λ1) n1(λ2),n1(λ3)分别为第一光学部件的折射率,n2(λ1),n2(λ2),n2(λ3)分别为第二光学部件的折射率。

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