公开(公告)号：US5627818A

公开(公告)日：1997-05-06

申请号：US250320

申请日：1994-05-27

申请人： Timothy S. Gardner ,  Delbert A. Hansen ,  Ronald P. Stahl

发明人： Timothy S. Gardner ,  Delbert A. Hansen ,  Ronald P. Stahl

IPC分类号： G11B7/007 ,  G11B7/09 ,  G11B7/13 ,  G11B7/22 ,  G11B7/24 ,  G11B11/105 ,  G11B7/00

CPC分类号： G11B11/10595 ,  G11B11/10576 ,  G11B7/0948 ,  G11B7/22 ,  G11B7/24 ,  G11B7/0901 ,  G11B7/13

摘要： A magnetooptical disk recording device has a far-field detector for detecting radial position of a laser beam with respect to tracks on the disk. The far-field detector has a reference line dividing first and second photo detectors. The reference line is centered radially with respect to center lines of the tracks. The reference line is also center lengthwise to be tangentially center with respect to a tangential point on the track. The detector is adjustable both radially and tangentially. The tangential adjustment is based upon sensing two low reflective calibration marks on the disk that indicate centering the laser beam, hence the track tangent point, on the reference line. The calibration is based upon obtaining minimum noise in the detector output signal that signifies that the laser beam is centered on the length of the detector reference line. The calibration marks are in a mirror area disposed at one radial extremity of the disk. The marks are radially elongate and disposed in a radially outward diverge with respect to each other. The marks are disposed at 45 degrees with respect to two circumferentially spaced apart radial lines of the disk.

摘要翻译： 磁光盘记录装置具有用于检测激光束相对于盘上的轨迹的径向位置的远场检测器。 远场检测器具有划分第一和第二光电检测器的参考线。 参考线相对于轨道的中心线径向对中。 参考线也是纵向中心地相对于轨道上的切线点切向中心。 检测器径向和切向可调。 切向调整基于感测盘上的两个低反射校准标记，其指示将参考线上的激光束定心，从而对准轨道切线点。 校准基于获得检测器输出信号中的最小噪声，其表示激光束以检测器参考线的长度为中心。 校准标记位于设置在盘的一个径向末端处的镜像区域中。 标记是径向伸长的并且相对于彼此径向向外发散设置。 标记相对于盘的两个周向间隔开的径向线设置成45度。

公开(公告)号：US5553054A

公开(公告)日：1996-09-03

申请号：US384176

申请日：1995-02-06

申请人： Timothy S. Gardner ,  Tomoaki Kimura ,  Delbert A. Hansen

发明人： Timothy S. Gardner ,  Tomoaki Kimura ,  Delbert A. Hansen

IPC分类号： G11B21/08 ,  G11B7/085 ,  G11B7/00

CPC分类号： G11B7/08588

摘要： A coarse position sensor is provided for an optical recording device to generate a substantially linear coarse position signal, indicative of the position of a coarse carriage along the range of its travel, and which also is substantially immune to environmental and device variations. The sensor includes a light source mounted to a drive frame at one end of the range of travel, a position sensitive device fixed to the frame at the opposite end of the range of travel and facing the light source, and a deflecting optical element mounted to the coarse carriage in the path of the light. As the coarse carriage travels along its stroke between the inner and outer diameters of the optical disk, the amount of deflection of the light beam on the position sensitive device from a reference location will change. Based upon a trigonometric equation, a coarse position signal generator receives the output of the position sensitive device and generates a substantially linear coarse position signal indicative of the position of the coarse carriage.

摘要翻译： 提供了一种用于光学记录装置的粗略位置传感器，以产生一个基本上线性的粗略位置信号，指示粗略支架沿其行程范围的位置，并且基本上不受环境和装置变化的影响。 所述传感器包括安装在所述行程范围的一端的驱动框架的光源，位于所述移动范围的相对端并面向所述光源的所述框架的位置敏感装置以及安装到 在光的路径上的粗车。 当粗滑架沿着光盘的内径和外径之间的行程行进时，来自参考位置的位置敏感装置上的光束的偏转量将改变。 基于三角方程，粗略位置信号发生器接收位置敏感装置的输出并产生指示粗滑架的位置的基本线性的粗略位置信号。

公开(公告)号：US5367513A

公开(公告)日：1994-11-22

申请号：US148695

申请日：1993-11-05

申请人： Keith A. Bates ,  Nhan X. Bui ,  Delbert A. Hansen

发明人： Keith A. Bates ,  Nhan X. Bui ,  Delbert A. Hansen

IPC分类号： G11B7/09 ,  G11B7/095

CPC分类号： G11B7/0946 ,  G11B7/094

摘要： A circuit for electronically compensating for optical and mechanical instabilities induced into the focus control and tracking control servo circuits of an optical disk apparatus. The circuit contains a filter and a variable gain amplifier for passing a tracking error signal compensation component at a selected frequency within the range of frequencies in which mechanical resonance is significant and at a magnitude equal to the focus error signal component at that frequency. The result is the electronic elimination of optical feedthrough at mechanically resonating frequencies. A calibration circuit establishes the compensation component magnitude for each optical disk inserted into the apparatus.

摘要翻译： 一种电子补偿光学和机械不稳定性的电路，该光学和机械不稳定性被引入到光盘装置的聚焦控制和跟踪控制伺服电路中。 该电路包含一个滤波器和一个可变增益放大器，用于将机械共振的频率范围内的选定频率的跟踪误差信号补偿分量传递到与该频率处的聚焦误差信号分量相等的幅度。 结果是在机械谐振频率下电子消除光学馈通。 校准电路为插入设备中的每个光盘建立补偿分量幅度。