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15 条记录 (耗时 0.014 秒)

    Focussing system and methods for multi-track optical disk apparatus
    11.
    发明授权
    Focussing system and methods for multi-track optical disk apparatus 失效
    多轨光盘设备的聚焦系统和方法

    公开(公告)号：US5708634A

    公开(公告)日：1998-01-13

    申请号：US531764

    申请日：1995-09-20

    申请人： Amir Alon ,  Jacob Finkelstein ,  Itzhak Katz ,  Michael Naor ,  Shlomo Shapira

    发明人： Amir Alon ,  Jacob Finkelstein ,  Itzhak Katz ,  Michael Naor ,  Shlomo Shapira

    IPC分类号： G11B7/09 ,  G11B7/13 ,  G11B7/135 ,  G11B7/14 ,  G11B7/095

    CPC分类号： G11B7/131 ,  G11B7/0909 ,  G11B7/0912 ,  G11B7/094 ,  G11B7/1372 ,  G11B7/14

    摘要： Focussing system methods and apparatus are provided for apparatus capable of simultaneously reading multiple tracks of an optical disk. Astigmatism introduced by a cylindrical lens disposed adjacent to the light source, or before the focus detectors arranged at the edge of a wide-area field of illumination, is used to compute an error signal corresponding to the degree of out-of-focus, which error signal is provided to a servo-system that moves the objective lens to correct the focus. An alternative embodiment employs a pair of focus detectors and a pair of micro-lenses having different focal lengths that directs the reflected light onto the focus detectors to generate a focus correction signal. Further alternative embodiments of employing the astigmatism method of focussing are described.

    摘要翻译： 提供了能够同时读取光盘的多个轨道的装置的聚焦系统方法和装置。 由与邻近光源设置的柱面透镜或者布置在大面积照明区域的边缘处的焦点检测器之前的散光引入的散光用于计算对应于失焦程度的误差信号，其中 误差信号被提供给移动物镜以校正焦点的伺服系统。 替代实施例采用一对焦点检测器和具有不同焦距的一对微透镜，其将反射光引导到焦点检测器上以产生聚焦校正信号。 描述采用聚焦散光方法的其它替代实施例。

    METHOD AND APPARATUS FOR HIGH RESOLUTION MEASUREMENT OF SIGNAL TIMING
    12.
    发明申请
    METHOD AND APPARATUS FOR HIGH RESOLUTION MEASUREMENT OF SIGNAL TIMING 失效
    用于信号时序高分辨率测量的方法和装置

    公开(公告)号：US20070223634A1

    公开(公告)日：2007-09-27

    申请号：US11277400

    申请日：2006-03-24

    申请人： Bassel Haddad ,  Jacob Finkelstein

    发明人： Bassel Haddad ,  Jacob Finkelstein

    IPC分类号： H04L7/00 ,  H03D3/24

    CPC分类号： H03L7/091 ,  H03D13/003

    摘要： A phase measurement system for measuring a phase difference between an input signal and a reference signal, comprises: a phase comparator having a first input receiving a first sample of the input signal and a second sample of the input signal and having a second input receiving a clock derived from the reference signal, the phase comparator having an output representing a time between a crossing of a first threshold by the clock and a predetermined time along an interval from the first sample to the second sample where the input signal crosses a second threshold on the interval; an interpolator coupled to the first input and having an output indicative of an interpolated time of the second-threshold-crossing on the interval in the input signal; and a phase calculator coupled to the phase comparator output and the interpolator output and which computes the phase difference by combining the phase comparator output and the interpolator output.

    摘要翻译： 一种用于测量输入信号和参考信号之间的相位差的相位测量系统，包括：相位比较器，具有接收所述输入信号的第一采样的第一输入端和所述输入信号的第二采样，并具有接收第 从参考信号导出的时钟，相位比较器具有表示在第一阈值与时钟交叉之间的时间的输出和沿着从第一采样到第二采样的间隔的预定时间，其中输入信号跨越第二阈值 间隔; 内插器，其耦合到所述第一输入端，并且具有指示所述输入信号中的间隔上的所述第二阈值交叉的内插时间的输出; 以及相位计算器，其耦合到相位比较器输出和内插器输出，并且通过组合相位比较器输出和内插器输出来计算相位差。

    DVD-R/RW and DVD+R/RW Recorders
    13.
    发明申请
    DVD-R/RW and DVD+R/RW Recorders 有权
    DVD-R / RW和DVD + R / RW录像机

    公开(公告)号：US20070081438A1

    公开(公告)日：2007-04-12

    申请号：US11163237

    申请日：2005-10-11

    申请人： Bassel Haddad ,  Jacob Finkelstein

    发明人： Bassel Haddad ,  Jacob Finkelstein

    IPC分类号： G11B20/12 ,  G11B27/36

    CPC分类号： G11B20/10222 ,  G11B7/0053 ,  G11B7/24082 ,  G11B20/10212 ,  G11B20/10425 ,  G11B2020/1461 ,  G11B2220/216 ,  G11B2220/2562

    摘要： A method and apparatus for recording data at specific locations on a DVD includes selectively detecting the occurrence of wobble sync during a window computed from previous occurrences of wobble sync and eight-to-fourteen modulation sync. The method and apparatus also uses a phase-locked loop to recover the wobble signal, including wobble sync, and computes phase drift between wobble sync and eight-to-fourteen modulation sync and applies a compensation profile, compatible with a read clock phase-locked loop, to the wobble sync phase-locked loop.

    摘要翻译： 用于在DVD上的特定位置记录数据的方法和装置包括在从先前出现的摆动同步和八到十四调制同步计算的窗口期间选择性地检测摆动同步的发生。 该方法和装置还使用锁相环来恢复摆动信号，包括摆动同步，并且计算摆动同步和八到十四调制同步之间的相位漂移，并且应用与读时钟锁相兼容的补偿曲线 循环到摆动同步锁相环。