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    Optical focus position control in an optical memory system
    2.
    发明公开
    Optical focus position control in an optical memory system 失效
    光学记忆系统中的光学位置控制

    公开(公告)号：EP0122816A3

    公开(公告)日：1985-11-27

    申请号：EP84302661

    申请日：1984-04-18

    申请人： SHARP KABUSHIKI KAISHA

    发明人： Fujii, Yosikazu ,  Inui, Tetsuya ,  Deguchi, Toshihisa ,  Yamaoka, Hideyoshi

    IPC分类号： G11B07/08 ,  G11B13/04 ,  G11B11/10

    CPC分类号： G11B7/0932 ,  G11B7/093 ,  G11B11/10504 ,  G11B11/10576

    摘要： An optical focus position control system in an optomagnetic disc apparatus includes a tracking control device and a focus control device. The tracking control device includes an intermediate holder, a tracking parallel spring which connects an objective lens-mirror cylinder to the intermediate holder while ensuring movement of the objective lens-mirror cylinder in the radial direction of the optomagnetic disc, and a tracking drive mechanism to shift the objective lens-mirror cylinder in the radial direction within the intermediate holder. The focus control device includes a stationary holder, a focusing parallel spring which connects the intermediate holder to the stationary holder while ensuring movement of the intermediate holder in the direction of the optical axis of laser beams emitted through the optical focus position control system, and a focusing drive mechanism to shift the intermediate holder in the optical axis direction within the stationary holder.

    Optical focus position control in an optical memory system
    3.
    发明公开
    Optical focus position control in an optical memory system 失效
    光学的调整中的光存储方法聚焦。

    公开(公告)号：EP0122816A2

    公开(公告)日：1984-10-24

    申请号：EP84302661.8

    申请日：1984-04-18

    申请人： SHARP KABUSHIKI KAISHA

    发明人： Fujii, Yosikazu ,  Inui, Tetsuya ,  Deguchi, Toshihisa ,  Yamaoka, Hideyoshi

    IPC分类号： G11B7/08 ,  G11B13/04 ,  G11B11/10

    CPC分类号： G11B7/0932 ,  G11B7/093 ,  G11B11/10504 ,  G11B11/10576

    摘要： An optical focus position control system in an optomagnetic disc apparatus includes a tracking control device and a focus control device. The tracking control device includes an intermediate holder, a tracking parallel spring which connects an objective lens-mirror cylinder to the intermediate holder while ensuring movement of the objective lens-mirror cylinder in the radial direction of the optomagnetic disc, and a tracking drive mechanism to shift the objective lens-mirror cylinder in the radial direction within the intermediate holder. The focus control device includes a stationary holder, a focusing parallel spring which connects the intermediate holder to the stationary holder while ensuring movement of the intermediate holder in the direction of the optical axis of laser beams emitted through the optical focus position control system, and a focusing drive mechanism to shift the intermediate holder in the optical axis direction within the stationary holder.