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    • 2. 发明授权
    • Optical pickup and an optical pickup objective lense assembling method
    • 光学拾取和光学拾取物镜组合方法
    • US6055113A
    • 2000-04-25
    • US35138
    • 1998-03-05
    • Kenji YamamotoIsao IchimuraFumisada MaedaToshio WatanabeAkira SuzukiKiyoshi Ohsato
    • Kenji YamamotoIsao IchimuraFumisada MaedaToshio WatanabeAkira SuzukiKiyoshi Ohsato
    • G11B7/135G11B7/22G02B7/02
    • G11B7/22G11B7/1374G11B2007/13727
    • This invention intends to provide an optical pickup of which it is possible to limit aberrations within a tolerable limit without incorporating a special device for that purpose even if errors arise in thickness of component lenses of a two-lens system constituting an element of the pickup. This object is achieved by providing an optical pickup incorporating a two-lens system with first and second lenses 13 and 14 being arranged in the following manner: the first lens has a first surface 15 to receive a laser beam radiated from a semiconductor laser and a second surface 16 to direct the laser beam transmitted from the first surface 15 towards the second lens 14; the second lens 14 has a third surface 17 to receive the light flux transmitted from the second surface 16 and a fourth surface 18 to direct the light flux transmitted from the third surface 17 towards an optical disc placed opposite thereto; and the first and fourth surfaces are used as a reference during positioning.
    • 本发明旨在提供一种光拾取器,即使在构成拾取器的元件的双透镜系统的分量透镜的厚度上出现误差,也可以将像差限制在可容许极限内,而不需要用于该目的的特殊装置。 该目的通过提供一种包含双透镜系统的光学拾取器来实现,其中第一和第二透镜13和14以如下方式布置:第一透镜具有第一表面15,以接收从半导体激光器辐射的激光束和 第二表面16,用于将从第一表面15传递的激光束引向第二透镜14; 第二透镜14具有第三表面17,用于接收从第二表面16传播的光束和第四表面18,以将从第三表面17传播的光束朝向与其相对放置的光盘; 并且在定位期间将第一和第四表面用作参考。
    • 4. 发明授权
    • Optical pick-up device, optical recording/reproducing apparatus and
objective lens
    • 光学拾取装置,光学记录/再现装置和物镜
    • US6115347A
    • 2000-09-05
    • US919119
    • 1997-08-28
    • Isao IchimuraFumisada MaedaKenji YamamotoKiyoshi OhsatoToshio WatanabeAtsushi FukumotoAkira Suzuki
    • Isao IchimuraFumisada MaedaKenji YamamotoKiyoshi OhsatoToshio WatanabeAtsushi FukumotoAkira Suzuki
    • G11B7/09G11B7/135G11B7/22G11B11/105G11B7/00
    • B82Y10/00G11B11/10543G11B7/0935G11B7/1387G11B7/22G11B2007/13727G11B7/0927
    • An optical pickup device for improving the numerical aperture of an objective lens and for assuring high-reliability recording/reproduction of information signals. The optical pickup device has a first lens 6 having a curvilinear or planar surface facing an optical recording medium 5 and having the numerical aperture set to a pre-set value, and a second lens 3 arranged for clamping the first lens 6 between t and the optical recording medium 5. The optical pickup device also has a light-converging optical system for converging the reflected light from the surface of the optical recording medium 5 and a first movement unit 2 for moving the first objective lens 6 and the second lens 3 along the direction of the optical axis with respect to the second objective lens 3. The optical pickup device also has a second movement unit 11 for moving the first objective lens 6 along the direction of the optical axis relative to the second objective lens 3 and a fixation unit 12 for fixing the first objective lens 6 moved by the second movement unit 9. The method for adjusting the optical processing device includes a step of adjusting the position along the optical axis of the first objective lens 6 and a step of fixing the position of the first lens 6.
    • 一种用于改善物镜的数值孔径并确保信息信号的高可靠性记录/再现的光学拾取装置。 光学拾取装置具有第一透镜6,其具有面向光学记录介质5的曲面或平面表面,并且具有设定为预设值的数值孔径;以及第二透镜3,其布置成将第一透镜6夹在t和 光学记录介质5.光学拾取装置还具有用于会聚来自光学记录介质5的表面的反射光的聚光光学系统和用于沿第一透镜6和第二透镜3移动的第一移动单元2 相对于第二物镜3的光轴的方向。光学拾取装置还具有用于相对于第二物镜3沿着光轴的方向移动第一物镜6的第二移动单元11和固定 用于固定由第二移动单元9移动的第一物镜6的单元12.用于调整光学处理装置的方法包括以下步骤:沿着opti 第一物镜6的cal轴线和固定第一透镜6的位置的步骤。