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6 条记录 (耗时 0.012 秒)

    Tracking error detecting circuit of an optical storage apparatus
    4.
    发明公开
    Tracking error detecting circuit of an optical storage apparatus 失效
    Spurfolgefehlerdetektionsschaltung einer optischen Speichervorrichtung

    公开(公告)号：EP0867872A1

    公开(公告)日：1998-09-30

    申请号：EP98108647.3

    申请日：1996-11-29

    申请人： FUJITSU LIMITED

    发明人： Tomonori, Yamashita, c/o Fujitsu Peripherals Ltd ,  Shigenori, Yanagi, Fujitsu Limited

    IPC分类号： G11B7/085 ,  G11B7/09 ,  G11B7/095

    CPC分类号： G11B11/10576 ,  G11B7/08517 ,  G11B7/08529 ,  G11B7/08541 ,  G11B7/0901 ,  G11B7/0908 ,  G11B7/0938 ,  G11B7/0941 ,  G11B7/0945 ,  G11B7/0953 ,  G11B11/10563 ,  G11B11/10597 ,  G11B19/12

    摘要： There is provided an optical storage apparatus which can properly form a tracking error signal (E2) even with respect to the presence or absence of a mirror portion due to a difference of a medium or a high speed seek. Therefore, the tracking error detection circuit (50) comprises a 2-split detector (46) for receiving the return light from said medium (72, 82) and converting into an electric signal (E5, E6); a subtracter (294) for forming the tracking error signal (E2) from a difference between photosensitive signals derived from said 2-split detector (46) and outputting; a peak holding circuit (290, 292) for detecting envelopes of the photosensitive signals from said 2-split detector (46) and outputting to said subtracter; and a switching control circuit (295) for on/off controlling an envelope detecting function by said peak holding circuit (290, 292) as necessary.

    摘要翻译： 对于磁道访问，物镜的减速度由跟踪误差信号的两个点控制。 在物镜固定的情况下确定盘的偏心度，该信息用作物镜定位的偏移。 跟踪信号的包络由信号峰值保持电路控制。 当ID部分到达时，不处理聚焦信号。

    Optical storage apparatus
    6.
    发明公开
    Optical storage apparatus 失效
    光存储设备

    公开(公告)号：EP0862169A1

    公开(公告)日：1998-09-02

    申请号：EP98108634.1

    申请日：1996-11-29

    申请人： FUJITSU LIMITED

    发明人： Tomonori, Yamashita, c/o Fujitsu Peripherals Ltd ,  Shigenori, Yanagi, c/o Fujitsu Limited

    IPC分类号： G11B7/085 ,  G11B7/095 ,  G11B7/09

    CPC分类号： G11B11/10576 ,  G11B7/08517 ,  G11B7/08529 ,  G11B7/08541 ,  G11B7/0901 ,  G11B7/0908 ,  G11B7/0938 ,  G11B7/0941 ,  G11B7/0945 ,  G11B7/0953 ,  G11B11/10563 ,  G11B11/10597 ,  G11B19/12

    摘要： There is provided an optical storage apparatus using a rewritable medium such a CD or MO cartridge which efficiently accurately measures eccentricity information that is necessary for an eccentricity correction and optimizes the eccentricity correction when a medium is loaded. Therefore, the optical storage apparatus comprises an eccentricity measuring unit (260) for measuring an eccentricity amplitude (Eamp) and an eccentricity phase (TΦ) for a start position of one rotation as eccentricity information on the basis of a detection of zero-cross points of a tracking error signal (E2) in a state in which the driving of the carriage (76) and lens (80) is stopped, an eccentricity memory (200) in which sine values corresponding to one rotation has been stored in correspondence to a rotating position of the medium (72, 82) and an eccentricity correcting unit for obtaining a medium eccentricity amount from the sine value read out from the memory (200) and eccentricity information measured by the measuring unit (260) and controlling a positioner (60) so as to set off the eccentricity amount.

    摘要翻译： 提供一种使用诸如CD或MO盒的可重写介质的光学存储设备，其有效精确地测量偏心校正所需的偏心信息并优化载入介质时的偏心校正。 因此，光存储装置包括偏心度测量单元（260），其用于基于零交叉点的检测来测量作为偏心信息的一次旋转的开始位置的偏心幅度（Eamp）和偏心相位（TΦ） ，在滑架（76）和透镜（80）的驱动停止的状态下的跟踪误差信号（E2）的偏差存储器（200），其中与一次旋转对应的正弦值对应于 （72,82）的旋转位置和偏心度校正单元，用于从由存储器（200）读出的正弦值和由测量单元（260）测量的偏心率信息获得中等偏心量并控制定位器（60） ）以便抵消偏心量。