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9 条记录 (耗时 0.013 秒)

    Focusing system for a moveable lens
    4.
    发明公开
    Focusing system for a moveable lens 失效
    可移动镜头聚焦系统

    公开(公告)号：EP0460859A3

    公开(公告)日：1992-04-01

    申请号：EP91304858.3

    申请日：1991-05-29

    申请人： International Business Machines Corporation

    发明人： Fennema, Alan August ,  Roberts, Spencer Donald

    IPC分类号： G11B7/085 ,  G11B7/09

    CPC分类号： G11B7/08511 ,  G11B7/0908

    摘要： The present invention relates to a focusing system for a moveable lens comprising a moveable lens (10), moving means (15,16) for moving the lens, and a control system (20, 21, 22, 23) for supplying position control signals 24) to the moving means and for detecting when the lens is in an in-focus position. According to the invention the focusing system is characterised in that the control system comprises means for supplying a ramp position control signal to the moving means to move the lens into an in-focus position, and modulating means for modulating the ramp position control signal so that it becomes a series of pulses.

    Focusing system for a moveable lens
    5.
    发明公开
    Focusing system for a moveable lens 失效
    Fokussierungssystemfürbewegliche Linse。

    公开(公告)号：EP0460859A2

    公开(公告)日：1991-12-11

    申请号：EP91304858.3

    申请日：1991-05-29

    申请人： International Business Machines Corporation

    发明人： Fennema, Alan August ,  Roberts, Spencer Donald

    IPC分类号： G11B7/085 ,  G11B7/09

    CPC分类号： G11B7/08511 ,  G11B7/0908

    摘要： The present invention relates to a focusing system for a moveable lens comprising a moveable lens (10), moving means (15,16) for moving the lens, and a control system (20, 21, 22, 23) for supplying position control signals 24) to the moving means and for detecting when the lens is in an in-focus position.
    According to the invention the focusing system is characterised in that the control system comprises means for supplying a ramp position control signal to the moving means to move the lens into an in-focus position, and modulating means for modulating the ramp position control signal so that it becomes a series of pulses.

    摘要翻译： 本发明涉及一种用于可移动透镜的聚焦系统，包括可移动透镜（10），用于移动透镜的移动装置（15,16）以及用于提供位置控制信号的控制系统（20,21,22,23） 24）移动到移动装置并用于检测透镜何时处于对焦位置。 根据本发明，聚焦系统的特征在于，控制系统包括用于向移动装置提供斜坡位置控制信号以将透镜移动到对焦位置的装置，以及用于调制斜坡位置控制信号的调制装置，使得 它成为一系列脉冲。

    Transducer positioning servo mechanism
    6.
    发明公开
    Transducer positioning servo mechanism 失效
    伺服机构zur Positionierung eines流浪者。

    公开(公告)号：EP0408310A2

    公开(公告)日：1991-01-16

    申请号：EP90307526.5

    申请日：1990-07-10

    申请人： International Business Machines Corporation

    发明人： Belser, Karl Arnold ,  Dounn, Paul Joseph ,  Henderson, Ian Edward ,  Kadlec, Ronald James ,  Roberts, Spencer Donald

    IPC分类号： G11B7/085

    CPC分类号： G05B19/232 ,  G05B2219/37313 ,  G05B2219/42209 ,  G11B7/08517 ,  G11B7/08529 ,  G11B7/08541 ,  G11B7/0941 ,  G11B21/085

    摘要： A track-seeking system for an optical disk using a velocity control loop with partially-digitized velocity measurement is described in which the sample period of the position error signal is varied in accordance with a velocity profile and a gain of the digital circuits is adjusted, also in accordance with the velocity profile, for providing optimum operation of the digitized portion of the velocity signal generator. In another aspect of the velocity-signal generation, the same digital circuit generates a velocity reference signal and a velocity error signal from a common desired velocity profile set of values.

    摘要翻译： 描述了使用具有部分数字化速度测量的速度控制回路的光盘追踪系统，其中位置误差信号的采样周期根据速度分布而变化，并且数字电路的增益被调整， 还根据速度分布，用于提供速度信号发生器的数字化部分的最佳操作。 在速度信号生成的另一方面，相同的数字电路产生速度参考信号和来自公共所需速度分布集值的速度误差信号。