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    • 34. 发明申请
    • OPTICAL PICK-UP APPARATUS
    • 光学拾取装置
    • US20080013433A1
    • 2008-01-17
    • US11775007
    • 2007-07-09
    • Tohru KimuraKohei OtaKiyono Ikenaka
    • Tohru KimuraKohei OtaKiyono Ikenaka
    • G02B13/18
    • G02B27/0068G11B7/1369G11B7/1378G11B7/13925G11B2007/0006G11B2007/0013
    • An optical pickup apparatus for conducting recording and/or reproducing information for a first optical information recording medium including at least a transparent protective substrate, a first information recording surface, and a second information recording surface which are laminated in this order from a light source side along an optical axis, comprising: a first light source to emit a light flux having a wavelength of λ1 (380 nm≦λ1≦450 nm); an objective lens to converge the light flux onto the first optical information recording medium; a spherical aberration correcting structure to correct a spherical aberration caused in a converged spot on the first and second information recording surfaces due to a difference in thickness between the thickness to the first information recording surface and the thickness to the second information recording surface.
    • 一种用于对包括至少透明保护基板,第一信息记录表面和第二信息记录表面的第一光学信息记录介质进行记录和/或再现信息的光学拾取装置,其从光源侧依次层叠 沿着光轴,包括:发射波长为λ1(380nm <λ1= 450nm)的光束的第一光源; 用于将光束会聚到第一光学信息记录介质上的物镜; 球面像差校正结构,用于校正由于第一信息记录表面的厚度与第二信息记录表面的厚度之间的厚度差,在第一和第二信息记录表面上的会聚点引起的球面像差。
    • 37. 发明申请
    • Optical pickup apparatus
    • 光拾取装置
    • US20070211603A1
    • 2007-09-13
    • US11713491
    • 2007-03-01
    • Kiyono Ikenaka
    • Kiyono Ikenaka
    • G11B7/00
    • G11B7/1374G11B7/1275G11B7/1353G11B7/13922G11B2007/0006
    • The present invention provides an optical pickup apparatus including a first light source, a second light source, a third light source, and a light-converging optical system including an objective lens. The objective lens includes at least one optical surface with a diffractive structure. The diffractive structure includes a plurality of ring shaped zones. Each of the ring shaped zones is concentrically arranged around an optical axis and includes a step difference extending along the optical axis. In the objective lens, the predetermined conditions according to the offence against a sine condition, an average of step differences of the plurality of ring shaped zones, a focal length, and a magnification, are satisfied.
    • 本发明提供一种包括第一光源,第二光源,第三光源和包括物镜的聚光光学系统的光学拾取装置。 物镜包括具有衍射结构的至少一个光学表面。 衍射结构包括多个环形区域。 每个环形区域围绕光轴同心地布置并且包括沿着光轴延伸的台阶差。 在物镜中,满足根据正弦条件的违规的预定条件,多个环形区域的阶梯差的平均值,焦距和倍率。
    • 38. 发明申请
    • Optical pickup apparatus
    • 光拾取装置
    • US20070177483A1
    • 2007-08-02
    • US11657089
    • 2007-01-24
    • Tatsuji KurogamaKiyono Ikenaka
    • Tatsuji KurogamaKiyono Ikenaka
    • G11B7/00
    • G11B7/1353G11B7/1263G11B2007/0006
    • An optical pickup apparatus, comprising: a light source to emit a light flux; a light converging system including an objective lens to converge the light flux emitted from said light source onto an optical information recording medium; a first diffraction element placed within an optical path up to the optical information recording medium; a light flux splitting element that is placed within the optical path from said light source up to the optical information recording medium and that splits an incident light flux emitted by the light source; a monitor element that receives a light flux split by said light flux splitting element and outputs a signal according to a received light amount; a second diffraction element placed between said light flux splitting element and said monitor element; and a control section that controls the drive of said light source according to the signal from said monitor element.
    • 一种光拾取装置,包括:发射光束的光源; 一种会聚系统,包括物镜,将从所述光源发射的光束会聚到光学信息记录介质上; 放置在光学信息记录介质的光路内的第一衍射元件; 光通量分离元件,其被放置在从所述光源到光信息记录介质的光路内,并且分解由光源发射的入射光束; 监视器元件,其接收由所述光束分离元件分离的光束并根据接收到的光量输出信号; 放置在所述光束分离元件和所述监视元件之间的第二衍射元件; 以及控制部,其根据来自所述监视元件的信号来控制所述光源的驱动。
    • 40. 发明授权
    • Converging optical system of optical pickup device
    • 光学拾取装置的聚光光学系统
    • US07206274B2
    • 2007-04-17
    • US10809424
    • 2004-03-26
    • Kiyono Ikenaka
    • Kiyono Ikenaka
    • G11B7/00
    • G02B5/1895G02B27/108G02B27/1086G02B27/141G02B27/145G02B27/42G02B27/4238G02B27/4283G02B27/4288G11B7/1275G11B7/1353G11B7/1374G11B7/1378G11B7/13922G11B2007/0006G11B2007/13727
    • A light converging optical system for use in an optical pickup apparatus which conducts reproducing and/or recording information for a first optical information recording medium and a second optical information recording medium using light fluxes emitted by a first light source and a second light source respectively, includes an objective optical element being a single lens; a first optical element being a single lens; and a phase difference giving structure formed on at least one optical surface of optical surfaces of the objective optical element and the first optical element and for giving a phase difference, the phase difference giving structure having a chromatic aberration correcting function for correcting a chromatic aberration in such a way that when the wavelength of a light flux emitted from the first light source varies, the phase difference giving structure corrects a varied aberration quantity before and after the wavelength variation.
    • 一种用于光拾取装置的聚光光学系统,其分别使用由第一光源和第二光源发射的光束对第一光学信息记录介质和第二光学信息记录介质进行再现和/或记录信息, 包括作为单个透镜的物镜光学元件; 第一光学元件是单个透镜; 以及形成在物镜光学元件和第一光学元件的光学表面的至少一个光学表面上并且用于给出相位差的相位差给定结构,该相位差给出结构具有用于校正色差的色像差校正功能 这样,当从第一光源发射的光束的波长变化时,相位差给出结构校正波长变化之前和之后的变化的像差量。