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32 条记录 (耗时 0.056 秒)

    Flexure suspension for two axis actuator
    7.
    发明授权
    Flexure suspension for two axis actuator 失效
    双轴执行器的弯曲悬架

    公开(公告)号：US5313332A

    公开(公告)日：1994-05-17

    申请号：US98212

    申请日：1993-07-26

    申请人： David L. Schell ,  Leonardus J. Grassens ,  Kurt W. Getreuer

    发明人： David L. Schell ,  Leonardus J. Grassens ,  Kurt W. Getreuer

    IPC分类号： G11B7/09 ,  G11B7/00

    CPC分类号： G11B7/0932

    摘要： A device for reading information from or writing information to an optical disc memory system using light from a laser diode includes an upper and lower flexure suspension. Both flexure suspensions are mounted on both an objective lens holder and its base. Each of these flexures is U-shaped and the central part of each leg of the U is a stiff beam. At each end of the control beam is provided a tracking hinge. Outward from the tracking hinges are a pair of focusing hinges which are separated from the tracking hinges by means of spacing beam sections. The unique configuration of the system allows these parallel mounted flexures to move in only two rigid modes namely, displacement along the x-axis (tracking) and displacement along the z-axis (focusing). These two rigid modes allow the objective lens to be re-positioned so that light beams may strike the information medium correctly. The sturdiness of these beam section therefore constrains the four remaining degrees of freedom so that displacement in the y direction, namely tangential motion and rotation in the x, y and z directions, specifically roll, pitch and yaw are severely limited thus essentially eliminated. This feature is paramount in that the possibilities . for undesired skewing of the flexure and the attached objective lens are precluded.

    摘要翻译： 使用来自激光二极管的光从光盘存储器系统读取信息或向其写入信息的装置包括上和下挠曲悬架。 两个挠曲悬架均安装在物镜支架及其底座上。 这些挠曲中的每一个都是U形的，并且U的每个腿的中心部分是刚性梁。 在控制梁的每一端提供跟踪铰链。 从跟踪铰链出来的是一对聚焦铰链，其通过间隔梁部分与跟踪铰链分离。 该系统的独特配置允许这些平行安装的弯曲仅在两个刚性模式中移动，即沿着x轴的位移（跟踪）和沿z轴（聚焦）的位移。 这两种刚性模式允许物镜重新定位，使得光束可以正确地撞击信息介质。 因此，这些光束部分的坚固性限制了剩下的四个自由度，从而基本上消除了y方向上的位移，即在x，y和z方向上的切向运动和旋转，特别是滚动，俯仰和偏转。 这个功能是至关重要的，因为这些可能性。 为了防止挠曲和附着的物镜的不期望的偏斜被排除。

    Two axis electromagnetic actuator
    8.
    发明授权
    Two axis electromagnetic actuator 失效
    双轴电磁执行器

    公开(公告)号：US5136558A

    公开(公告)日：1992-08-04

    申请号：US368768

    申请日：1989-06-20

    申请人： Kurt W. Getreuer ,  Leonardus J. Grassens ,  David L. Schell

    发明人： Kurt W. Getreuer ,  Leonardus J. Grassens ,  David L. Schell

    IPC分类号： G11B7/085 ,  G11B7/09 ,  H02K41/035

    CPC分类号： H02K41/0354 ,  G11B7/08582 ,  G11B7/0935 ,  H02K41/0356

    摘要： An optical disc player/recorder incorporates a laser, and an electromagnetically driven objective lens. The objective lens is mounted to a lensholder which is movable with respect to a base. A single pair of permanent magnets are mounted to the lensholder, and two pair of electromagnetic coils are mounted to the base. The coils and magnets are positioned such that one set of coils is collinear with the direction of magnetization of the permanent magnets and the other set of coils is perpendicular to the direction of magnetization of the magnets. Electromagnetic fields generated by the coils are used to move the objective lens in either a focus direction or a tracking direction. The magnets are mounted on the moveable objective lensholder, while the coils are attached in a heat-sink relationship to the fitted base. The objective lens rests on top of the objective lensholder which is suspended with respect to the base by a pair of flexures. A mirror is provided between the flexures to allow incoming laser light to enter from the side of the optical head, thereby reducing the total overall height of the system. A position sensor may be provided to detect the position of the lensholder, relative to the base of the two axis electromagnetic actuator.

    摘要翻译： 光盘播放器/记录器包括激光器和电磁驱动的物镜。 物镜安装在相对于基座可移动的透镜架上。 一对永磁体安装在透镜架上，两对电磁线圈安装在基座上。 线圈和磁体被定位成使得一组线圈与永磁体的磁化方向共线，而另一组线圈垂直于磁体的磁化方向。 由线圈产生的电磁场用于在聚焦方向或跟踪方向上移动物镜。 磁体安装在可移动的物镜透镜座上，而线圈以与散热器关系的散热关系连接。 物镜靠在通过一对弯曲部相对于基部悬挂的物镜透镜的顶部。 在弯曲部之间设置有镜子，以允许进入的激光从光学头的侧面进入，从而减小了系统的总体总高度。 可以设置位置传感器以相对于两轴电磁致动器的基座检测透镜座的位置。

    Optical disk tracking and seeking systems and specific track formats using servo areas
    9.
    发明授权
    Optical disk tracking and seeking systems and specific track formats using servo areas 失效
    光盘跟踪和寻道系统以及使用伺服区的特定轨迹格式

    公开(公告)号：US4914645A

    公开(公告)日：1990-04-03

    申请号：US147690

    申请日：1988-01-25

    申请人： Kurt W. Getreuer ,  Johannes J. Verboom ,  David L. Schell ,  David E. Lewis ,  Gregory V. Hofer ,  Kathleen M. Connelly ,  James C. McDonald ,  Pierre R. Sonneville ,  Cees van Nimwegen

    发明人： Kurt W. Getreuer ,  Johannes J. Verboom ,  David L. Schell ,  David E. Lewis ,  Gregory V. Hofer ,  Kathleen M. Connelly ,  James C. McDonald ,  Pierre R. Sonneville ,  Cees van Nimwegen

    IPC分类号： G11B7/24 ,  G11B7/00 ,  G11B7/004 ,  G11B7/0065 ,  G11B7/007 ,  G11B7/013 ,  G11B7/085 ,  G11B7/09

    CPC分类号： G11B7/0938 ,  G11B7/085 ,  G11B7/0901 ,  G11B7/24085

    摘要： An optical disk recording system including a record medium is disclosed for providing an accurate track crossing count and an accurate track following signal. A first embodiment utilizes off-centered wobbled areas located in the headers of the record medium. The high frequency content of a first signal is combined with the low frequency content of a second signal, which is generated using the wobbled areas. In another embodiment, light-reflective discontinuities are provided in the header areas of the record medium. A qualifier and an AGC are utilized in providing a corrected track following signal. In still another embodiment, reflective discontinuities are located in the servo areas of the record medium. In such an embodiment, it is preferred that there is a fixed gain adjustment to a radial push-pull signal. With regard to each of the three aforesaid embodiments, a track following signal is corrected to compensate for aberrations that are caused by a shift of the light beam returned from the record medium surface. In yet another embodiment, the track following signal is generated using only the central aperture or wobble signal. In this embodiment, it is preferred that three pits be utilized in connection with the track following operation. The three pits are provided in two servo bytes of information located in the servo areas. Two of the three pits are wobble pits and the third pit is used in clocking.

    摘要翻译： 公开了一种包括记录介质的光盘记录系统，用于提供准确的轨道交叉计数和准确跟踪信号。 第一实施例使用位于记录介质的头部中的偏心摆动区域。 第一信号的高频内容与使用摆动区域产生的第二信号的低频内容组合。 在另一个实施例中，在记录介质的标题区域中提供光反射不连续性。 使用限定符和AGC来提供校正后的跟踪信号。 在另一个实施例中，反射不连续性位于记录介质的伺服区域中。 在这样的实施例中，优选的是对径向推挽信号进行固定增益调整。 对于上述三个实施例中的每一个，对跟踪跟踪信号进行校正，以补偿由从记录介质表面返回的光束的偏移引起的像差。 在另一个实施例中，仅使用中心孔径或摆动信号产生跟踪信号。 在该实施例中，优选地，跟踪跟踪操作结合使用三个凹坑。 三个凹坑位于伺服区域的两个伺服字节的信息中。 三个凹坑中的两个是摆动凹坑，第三个凹坑用于计时。

    Sampled servo for an optical disk drive
    10.
    发明授权
    Sampled servo for an optical disk drive 失效
    光盘驱动器的采样伺服

    公开(公告)号：US4779253A

    公开(公告)日：1988-10-18

    申请号：US902278

    申请日：1986-08-29

    申请人： Kurt W. Getreuer ,  Johannes J. Verboom ,  David L. Schell ,  David E. Lewis

    发明人： Kurt W. Getreuer ,  Johannes J. Verboom ,  David L. Schell ,  David E. Lewis

    IPC分类号： G11B7/00 ,  G11B7/004 ,  G11B7/005 ,  G11B7/0065 ,  G11B7/007 ,  G11B7/013 ,  G11B7/085 ,  G11B7/09 ,  G11B7/24 ,  G11B21/10

    CPC分类号： G11B7/085 ,  G11B7/0901 ,  G11B7/0938 ,  G11B7/24085

    摘要： Sampled servo data comprising one pit centered on a track and two pits spaced 1/4 track pitch from track center on opposite sides thereof provide for two sinusoidal tracking signals, one radially phase offset from the other by 90 degrees. A first tracking signal derived from subtracting the signals of the offset pits has a zero crossing at track center and is used by the servo system for tracking. Its derivative is used for damping. A second tracking signal derived from all three pits has maxima at track centers and is therefore 90 degrees out of phase with the first tracking signal. This second signal provides track crossing information, and when used in quadrature with the first tracking signal, provides information about the radial direction of crossing. The second signal also provides a control signal for inverting the damping signal while between tracks when the derivative of the first tracking signal would ordinarily be negative and provide for negative damping.

    摘要翻译： 包括以轨道为中心的一个凹坑的采样伺服数据和在其相对侧上从轨道中心间隔开1/4轨道间距的两个凹坑提供两个正弦跟踪信号，一个径向相位偏移90度。 从减去偏移坑的信号得到的第一跟踪信号在轨道中心处具有过零点，并被伺服系统用于跟踪。 其导数用于阻尼。 从所有三个凹坑导出的第二跟踪信号在轨道中心处具有最大值，因此与第一跟踪信号相差90度。 该第二信号提供轨道交叉信息，并且当与第一跟踪信号正交使用时，提供关于横向的径向方向的信息。 当第一跟踪信号的导数通常为负并且提供负阻尼时，第二信号还提供用于在磁道之间反转阻尼信号的控制信号。