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51 条记录 (耗时 0.115 秒)

    Methods, systems, and computer program products for correcting repeatable runout
    1.
    发明授权
    Methods, systems, and computer program products for correcting repeatable runout 失效
    用于校正可重复跳动的方法，系统和计算机程序产品

    公开(公告)号：US08565052B2

    公开(公告)日：2013-10-22

    申请号：US13528760

    申请日：2012-06-20

    申请人： Fred R. Hansen ,  Charles R. Watt

    发明人： Fred R. Hansen ,  Charles R. Watt

    IPC分类号： G11B7/00

    CPC分类号： G11B7/095 ,  G11B20/10388 ,  G11B2220/2537

    摘要： Methods and systems are described for correcting repeatable runout. In one aspect, an open loop tracking signal is received and squared. A discrete Fourier transform (DFT) of the squared open loop tracking signal is obtained. A velocity magnitude and an absolute value of the phase of the open loop tracking signal is determined. A RRO correction signal is iteratively constructed by performing a partial correction based on an initial phase selected and an initial velocity amplitude, measuring a relative velocity amplitude, performing a partial control correction using the initial phase and relative velocity amplitude if the amplitude is smaller than an initial amplitude or using the initial phase rotated by one hundred eighty degrees and the relative velocity amplitude if the amplitude is larger than an initial amplitude, and repeating the above steps until a tracking controller can perform closed loop control of the track to optical pickup unit velocity.

    摘要翻译： 描述了用于校正可重复跳动的方法和系统。 一方面，接收开环跟踪信号并进行平方。 获得平方开环跟踪信号的离散付里叶变换（DFT）。 确定开环跟踪信号的相位的速度幅度和绝对值。 通过基于所选择的初始相位和初始速度幅度来执行RRO校正信号，测量相对速度振幅，使用初始相位执行部分控制校正，如果振幅小于 初始振幅或使用初始相位旋转了一百八十度，如果幅度大于初始振幅，则相对速度振幅，并且重复上述步骤，直到跟踪控制器可以执行轨道到光学拾取单元速度的闭环控制 。

    Drum for use in testing optical tape media and method and apparatus for mounting optical tape media on drum
    2.
    发明授权
    Drum for use in testing optical tape media and method and apparatus for mounting optical tape media on drum 有权
    用于测试光带介质的鼓和用于在光盘上安装光带介质的方法和装置

    公开(公告)号：US08510766B2

    公开(公告)日：2013-08-13

    申请号：US13316966

    申请日：2011-12-12

    申请人： Faramarz Mahnad ,  Scott D. Wilson ,  Steve Ray ,  Charles R. Watt, Jr.

    发明人： Faramarz Mahnad ,  Scott D. Wilson ,  Steve Ray ,  Charles R. Watt, Jr.

    IPC分类号： G11B7/00

    CPC分类号： G11B20/1816 ,  G11B7/003 ,  G11B7/268 ,  G11B2220/90 ,  G11B2220/93

    摘要： Various embodiments herein include utilities that facilitate the substantially flat and aligned mounting of optical tape segments on testing drums to increase testing accuracy of the tape segments. In this regard, a drum for testing optical tape media is disclosed having a substantially planar portion onto which first and second ends of an optical tape segment may be mounted to thereby secure the entire tape segment around an outer testing surface of the drum. Also disclosed is fixture that may be used to precisely mount and secure the tape segment over the outer mounting surface of a drum in a manner that reduces axial run-out and wrinkling of the optical tape.

    摘要翻译： 本文中的各种实施例包括有利于将光带段基本上平坦和对准地安装在测试滚筒上以提高带段测试精度的效用。 在这方面，公开了一种用于测试光带介质的滚筒，其具有基本平坦的部分，光学带段的第一和第二端可以安装在该平面部分上，从而将整个带段固定在滚筒的外部测试表面上。 还公开了一种夹具，其可以用于以减少光学带的轴向偏离和起皱的方式将带段精确地安装和固定在滚筒的外部安装表面上。

    REDUCED CONVOLUTION FOR REPETITIVE DISTURBANCE REJECTION
    4.
    发明申请
    REDUCED CONVOLUTION FOR REPETITIVE DISTURBANCE REJECTION 有权
    减少反应性干扰的调整

    公开(公告)号：US20070273996A1

    公开(公告)日：2007-11-29

    申请号：US11752684

    申请日：2007-05-23

    申请人： Charles R. Watt ,  Xiao Zhang ,  John W. Vanlaanen

    发明人： Charles R. Watt ,  Xiao Zhang ,  John W. Vanlaanen

    IPC分类号： G11B5/09 ,  G11B21/02

    CPC分类号： G11B5/59616 ,  G11B5/59633

    摘要： Methods according to some embodiments include writing servo patterns on a data storage medium including a plurality of timing patterns in response to phase correction values generated using a phase correction value (PCV) kernel having a length that is less than the number of timing patterns on the data storage medium.

    摘要翻译： 根据一些实施例的方法包括：响应于使用长度小于所述定时模式的数量的相位校正值（PCV）内核产生的相位校正值，在包括多个定时模式的数据存储介质上写入伺服模式 数据存储介质。

    Focus detection in a digital focus servo system
    6.
    发明授权
    Focus detection in a digital focus servo system 失效
    数字聚焦伺服系统中的焦点检测

    公开(公告)号：US06970410B2

    公开(公告)日：2005-11-29

    申请号：US09950394

    申请日：2001-09-10

    申请人： Ron J. Kadlec ,  Charles R. Watt

    发明人： Ron J. Kadlec ,  Charles R. Watt

    IPC分类号： G11B7/00 ,  G11B7/09

    CPC分类号： G11B7/0948 ,  G11B7/0908 ,  G11B7/0946

    摘要： A system for determining whether a focus servo system is in focus or out of focus (i.e. open) is disclosed. A sum signal can be compared with a threshold value. If the sum signal is below the threshold value, then a focus open condition (i.e., out-of-focus) can be indicated. In some embodiments, a focus open condition is indicated where the sum signal remains below the threshold value for a predetermined period of time.

    摘要翻译： 公开了一种用于确定聚焦伺服系统是聚焦还是聚焦（即打开）的系统。 和信号可以与阈值进行比较。 如果和信号低于阈值，则可以指示聚焦打开状态（即，离焦）。 在一些实施例中，指示焦点打开状态，其中总和信号在预定时间段内保持低于阈值。

    Detector input stray light offset calibration in an optical disk drive
    9.
    发明授权
    Detector input stray light offset calibration in an optical disk drive 失效
    光盘驱动器中的检测器输入杂散光偏移校准

    公开(公告)号：US06885619B2

    公开(公告)日：2005-04-26

    申请号：US09950415

    申请日：2001-09-10

    申请人： Charles R. Watt

    发明人： Charles R. Watt

    IPC分类号： G11B7/00 ,  G11B7/09

    CPC分类号： G11B7/0945

    摘要： A calibration of input signal offsets for stray light in an optical disk drive is presented. The input signal offsets can be determined by setting a laser power level, receiving digitized input signals, and setting the input signal offsets so that the digitized input signals are zero. The laser power level can be a read power or a write power. In some embodiments, input signal offsets for both read power and write power are determined and stored.

    摘要翻译： 介绍了光盘驱动器中杂散光输入信号偏移的校准。 可以通过设置激光功率电平，接收数字化输入信号和设置输入信号偏移量来确定输入信号偏移量，使得数字化的输入信号为零。 激光功率电平可以是读取功率或写入功率。 在一些实施例中，确定并存储用于读取功率和写入功率的输入信号偏移。

    Optical disk drive with a digital focus and tracking servo system
    10.
    发明授权
    Optical disk drive with a digital focus and tracking servo system 失效
    具有数字对焦和跟踪伺服系统的光盘驱动器

    公开(公告)号：US06847597B2

    公开(公告)日：2005-01-25

    申请号：US09950365

    申请日：2001-09-10

    申请人： Ron J. Kadlec ,  Charles R. Watt ,  Christopher J. Turner ,  Hans B. Wach

    发明人： Ron J. Kadlec ,  Charles R. Watt ,  Christopher J. Turner ,  Hans B. Wach

    IPC分类号： G11B7/00 ,  G11B7/09 ,  G11B7/095

    CPC分类号： G11B7/094 ,  G11B7/0941

    摘要： A device with an optical disk drive with a digital servo system for controlling tracking or focus in an optical disk driver is presented. A servo system according to the present invention includes an optical pick-up with detectors providing optical signals, an analog processor receiving the optical signals and providing a digital signal, and digital processors receiving the digital signal and providing a control signal that controls the position of the optical pick-up unit. The digital processor executes an algorithm that calculates an error signal, provides amplification and biasing to the error signal, provides filtering for the error signal, and computes the control signal. The error signal can be the focus error signal or the tracking error signal. The device can be any device.

    摘要翻译： 本发明提供一种具有数字伺服系统的光盘驱动器，用于控制光盘驱动器中的跟踪或聚焦。 根据本发明的伺服系统包括具有提供光信号的检测器的光学拾取器，接收光信号并提供数字信号的模拟处理器，以及接收数字信号的数字处理器，并提供控制信号， 光学拾取单元。 数字处理器执行计算误差信号的算法，提供误差信号的放大和偏置，为误差信号提供滤波，并计算控制信号。 误差信号可以是聚焦误差信号或跟踪误差信号。 该设备可以是任何设备。