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    • 118. 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。