Invention Grant
US06687062B2 Objective lens-driving apparatus 有权
物镜驱动装置

  • Patent Title: Objective lens-driving apparatus
  • Patent Title (中): 物镜驱动装置
  • Application No.: US10246398
    Application Date: 2002-09-19
  • Publication No.: US06687062B2
    Publication Date: 2004-02-03
  • Inventor: Keiji NakamuraMitoru Yabe
  • Applicant: Keiji NakamuraMitoru Yabe
  • Priority: JP2001-345782 20011112
  • Main IPC: G02B702
  • IPC: G02B702
Objective lens-driving apparatus
Abstract:
An objective lens driving apparatus is used for accurately positioning an abject to focus a light spot on an optical recording medium. A lens holder holds the objective lens and has a bearing hole through which a shaft extends in a direction parallel to the optical axis so that the lens holder is rotatably supported on the shaft. Two magnets are supported on the lens holder so that the shaft is between the magnets. A base has two magnetic members disposed such that each of the two magnets exerts an attraction force on a corresponding one of the two magnetic members to urge the lens holder in a direction of the optical axis and in a direction perpendicular to the optical axis. A first coil set of first focusing and tracking coils and a second coil set of focusing and tracking coils are mounted to the two magnetic members.
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