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    • 91. 发明申请
    • Optical Pickup Device and Objective Optical Element
    • 光学拾取装置和物镜光学元件
    • US20100124159A1
    • 2010-05-20
    • US12597160
    • 2008-04-08
    • Kentarou NakamuraTohru Kimura
    • Kentarou NakamuraTohru Kimura
    • G11B7/00
    • G11B7/1353G11B7/1374G11B7/13922G11B2007/0006
    • There are provided an optical pickup device which can satisfactorily record and/or reproduce information on different kinds of optical information recording medium in spite of compactness, and an objective optical element used for the optical pickup device. The optical functional surface of the objective optical element includes at least two areas of a central area including an optical axis and a peripheral area surrounding the central area. An optical path difference providing structure in the central area is a structure obtained by overlapping a first central basic structure and a second central basic structure which are in a shape of ring-shaped zones divided by step differences, with each other. An optical path difference providing structure in the peripheral area is a structure obtained by overlapping a first peripheral basic structure and a second peripheral basic structure which are in a shape of ring-shaped zones divided by step differences, with each other.
    • 提供了一种即使紧凑的,也可以令人满意地记录和/或再现不同种类的光学信息记录介质上的信息的光学拾取装置和用于光学拾取装置的物镜光学元件。 物镜光学元件的光学功能表面包括中心区域的至少两个区域,包括光轴和围绕中心区域的周边区域。 中心区域的光程差提供结构是通过将由阶梯差除以环状区域的形状的第一中心基础结构和第二中心基础结构重叠而得到的结构。 周边区域中的光程差提供结构是通过将由阶梯差除以环形区域的形状的第一周边基础结构和第二周边基础结构彼此重叠而获得的结构。
    • 94. 发明授权
    • Coupling optical system, optical element and optical pickup apparatus
    • 耦合光学系统,光学元件和光学拾取装置
    • US07542637B2
    • 2009-06-02
    • US11961838
    • 2007-12-20
    • Tohru Kimura
    • Tohru Kimura
    • G02B6/32G11B7/135
    • G02B6/4206G02B6/4246G11B7/1378G11B2007/13727
    • The present invention relates to a coupling optical system, an optical element, and an optical pickup apparatus. A coupling optical system is provided for use in an optical pickup apparatus and is arranged between a light source and an objective lens of the optical pickup apparatus. The coupling optical system includes: a first optical element with a power; and a second optical element with a positive power. The first optical element includes an optical surface, an out-effective-aperture section surrounding the optical surface, and a light-reduction structure arranged on the out-effective-aperture section. When a non-parallel light flux emitted from the light source enters into the out-effective-aperture section, the light-reduction structure reduces a light flux to be emitted from the second optical element in a direction getting closer to an optical axis of the second optical element.
    • 本发明涉及耦合光学系统,光学元件和光学拾取装置。 耦合光学系统被提供用于光学拾取装置,并且设置在光学拾取装置的光源和物镜之间。 耦合光学系统包括:具有功率的第一光学元件; 以及具有正功率的第二光学元件。 第一光学元件包括光学表面,围绕光学表面的有效孔径部分和布置在外部有效孔径部分上的减光结构。 当从光源发射的非平行光束进入有效孔径部分时,减光结构减小从第二光学元件发射的光束在更靠近光轴的方向 第二光学元件。
    • 96. 发明授权
    • Optical system having an objective system and an optical aberration correcting element
    • 具有物镜系统和光学像差校正元件的光学系统
    • US07417935B2
    • 2008-08-26
    • US10874318
    • 2004-06-24
    • Bernardus H. W. HendriksNobuyoshi MoriTohru Kimura
    • Bernardus H. W. HendriksNobuyoshi MoriTohru Kimura
    • G11B7/00
    • G11B7/1367G11B7/1378G11B7/13925G11B2007/13727
    • An optical system for use in an optical pickup device for recording and/or reproducing information on an optical recording media, the optical system having an optical axis and comprising: an objective system for converging a light beam emitted from a light source on the optical recording media; an optical aberration correcting element comprising two lenses arranged on an optical path between the light source and the objective system and having an adjustable distance in the direction of the optical axis, the optical aberration correcting element comprising a ring-shaped phase structure formed in at least one lens surface of the optical aberration correcting element, and wherein the ring shaped phase structure is non-periodic and comprises a plurality of concentric ring surfaces k (k=1 . . . N), and each of the ring surfaces has a step in the direction of the optical axis between the adjacent ring surface.
    • 一种用于光学拾取装置中用于在光学记录介质上记录和/或再现信息的光学系统,所述光学系统具有光轴并且包括:用于将从光源发射的光束会聚在光学记录上的物镜系统 媒体; 一种光学像差校正元件,包括布置在光源和物镜系统之间的光路上并且具有在光轴方向上的可调节距离的两个透镜,光学像差校正元件包括至少形成的环形相位结构 所述光学像差校正元件的一个透镜表面,并且其中所述环形相结构是非周期性的,并且包括多个同心环表面k(k = 1 ... N),并且每个所述环表面具有 相邻环表面之间光轴的方向。
    • 98. 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。