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1. 发明授权

US5038333A Positioning systems including reliable track crossing detection for high speed relative motions 失效
标题翻译：定位系统包括用于高速相对运动的可靠轨道交叉检测
公开(公告)号：US5038333A
公开(公告)日：1991-08-06
申请号：US347639
申请日：1989-05-05
申请人： William W. Chow , Alan A. Fennema , Benjamin C. Fiorino , Ian E. Henderson , Ronald J. Kadlec , Spencer D. Roberts
发明人： William W. Chow , Alan A. Fennema , Benjamin C. Fiorino , Ian E. Henderson , Ronald J. Kadlec , Spencer D. Roberts
IPC分类号： G05D3/12 , G11B7/085 , G11B11/105 , G11B21/08
CPC分类号： G11B7/08541 , G11B11/10556 , G11B21/088 , G11B7/08529
摘要： A track-seeking apparatus of a disk recorder employs a track-crossing sensor to produce track-crossing signals. An oscillator is slaved to the sensor for supplying substitute track-crossing pulses in the absence of the sensor providing such pulses or when the radial velocity exceeds a threshold velocity. A velocity profile means alters the oscillator frequency so that the oscillator produces track-crossing pulses in accordance with the profile.

2. 发明授权

US5090002A Positioning systems employing velocity and position control loops with position control loop having an extended range 失效
标题翻译：使用具有位置控制环的速度和位置控制环的定位系统具有扩展范围
公开(公告)号：US5090002A
公开(公告)日：1992-02-18
申请号：US320197
申请日：1989-03-07
申请人： William W. Chow , Alan A. Fennema , Ian E. Henderson , Ronald J. Kadlec
发明人： William W. Chow , Alan A. Fennema , Ian E. Henderson , Ronald J. Kadlec
IPC分类号： G11B21/10 , G05B19/23 , G05B19/39 , G05D3/12 , G11B7/085 , G11B7/09 , G11B11/105 , G11B21/08
CPC分类号： G11B11/10556 , G05B19/232 , G05B19/39 , G11B11/10571 , G11B21/085 , G11B7/08582 , G11B7/0901 , G05B2219/41457 , G05B2219/42104
摘要： A position servo system has a position loop and a velocity loop. The position loop controls the stop-lock condition and provides for movement control within a range about the stop-lock position. The velocity circuit is employed for movements outside of the range of the position servo circuit. When the velocity servo's loop is being used, a compare circuit compares the servo drive signal from the velocity circuit with a signal generated by the position servo loop which is tracking the velocity servo loop. When the compare circuit finds that the servo drive signals have equal amplitudes, then the velocity servo loop is disconnected from an actuator with the position servo loop then connected to the activation for completing the movement to a desired or target stop-lock position. The above-indicated servo system controls a topping or fine actuator carried on a carriage moved by a coarse actuator. The fine and coarse actuators move along the same axis and transverse to movement of any work element, such as a record storage disk. The coarse actuator is continuously slaved to the positioning of the topping or fine actuator. A relative position sensor disposed intermediate the fine and coarse actuators supplies a position error signal for enabling the coarse actuator to continuously follow the fine actuator. Feed forward signals are supplied from the fine actuator to the coarse actuator. A preferred embodiment is shown using an optical disk environment.

3. 发明授权

US4914725A Transducer positioning servo mechanisms employing digital and analog circuits 失效
标题翻译：采用数字和模拟电路的传感器定位伺服机构
公开(公告)号：US4914725A
公开(公告)日：1990-04-03
申请号：US377399
申请日：1989-07-10
申请人： Karl A. Belser , Paul J. Dounn , Ian E. Henderson , Ronald J. Kadlec , Spencer D. Roberts
发明人： Karl A. Belser , Paul J. Dounn , Ian E. Henderson , Ronald J. Kadlec , Spencer D. Roberts
IPC分类号： G05B19/23 , G11B7/085 , G11B7/09 , G11B21/08
CPC分类号： G05B19/232 , G11B21/085 , G11B7/08517 , G11B7/08529 , G11B7/08541 , G11B7/0941 , G05B2219/37313 , G05B2219/42209
摘要： A track-seeking system for an optical disk using a velocity control loop with partially-digitized velocity measurement. A quadrature signal is generated based on summing the halves of a position error signal to give directionality to track-crossing counts. A so-called piggy-back construction, wherein a fine positioner is carried by a coarse positioner, is employed. Feed-forward controls are provided from the fine to the coarse positioner. At track-capture time, the dynamic range of the fine positioner is momentarily increased.

4. 发明授权

US5555237A Contamination detection apparatus and method using write power calibration values 失效
标题翻译：污染检测装置和使用写功率校准值的方法
公开(公告)号：US5555237A
公开(公告)日：1996-09-10
申请号：US452916
申请日：1995-05-30
申请人： Bryan A. Cassels , James J. Dente , Andrew A. Gaudet , Ian E. Henderson , Daniel J. Winarski
发明人： Bryan A. Cassels , James J. Dente , Andrew A. Gaudet , Ian E. Henderson , Daniel J. Winarski
IPC分类号： G11B7/0037 , G11B7/12 , G11B7/125 , G11B20/18 , G11B7/00
CPC分类号： G11B7/126 , G11B20/1816 , G11B7/00375 , G11B7/12
摘要： A system to monitor write power calibration values in an optical drive to detect media and lens contamination, and take appropriate remedial action when contamination is found. A laser device writes data to an optical medium housed in the optical drive by imparting a laser beam upon the medium. The laser device provides the laser beam with a level of output power selected in accordance with a W/C value. A controller generates and repeatedly updates the W/C value, and provides it to the laser device. The controller samples the W/C value at selected times, and compares it to a predetermined value. If the W/C value exceeds the predetermined value, the controller executes a specific operational sequence. For example, the controller may issue a contamination warning. When the W/C value exceeds a second predetermined value, the controller may logically write-protect the optical medium, or shift the medium to another optical drive. Where the controller is implemented in an optical library with multiple optical drives, the controller may store a comprehensive list of W/C values for the drives.
摘要翻译：用于监视光驱中的写功率校准值以检测介质和镜头污染的系统，并在发现污染时采取适当的补救措施。激光装置通过在介质上施加激光束将数据写入到容纳在光驱中的光学介质上。激光装置为激光束提供根据W / C值选择的输出功率水平。控制器产生并重复更新W / C值，并将其提供给激光设备。控制器在选定的时间对W / C值进行采样，并将其与预定值进行比较。如果W / C值超过预定值，则控制器执行特定的操作顺序。例如，控制器可能发出污染警告。当W / C值超过第二预定值时，控制器可逻辑地对光介质进行写保护，或将介质转移到另一光驱。在具有多个光盘驱动器的光学库中实现控制器的情况下，控制器可以存储驱动器的W / C值的综合列表。

5. 发明授权

US5272692A Data storage member having areas in which intensity-modulated signals are overlaid with magneto-optically recorded signals 失效
标题翻译：数据存储部件具有强度调制信号被磁光记录信号覆盖的区域
公开(公告)号：US5272692A
公开(公告)日：1993-12-21
申请号：US896897
申请日：1992-06-10
申请人： Ian E. Henderson , Morovat Tayefeh
发明人： Ian E. Henderson , Morovat Tayefeh
IPC分类号： G11B7/013 , G11B7/085 , G11B11/105 , G11B19/02 , G11B27/24 , G11B27/28 , G11B11/00
CPC分类号： G11B7/24085 , G11B11/10565 , G11B11/10578 , G11B11/10584 , G11B11/10597 , G11B19/02 , G11B27/24 , G11B27/28 , G11B7/085 , G11B2220/2525
摘要： A magnetooptic disk has circumferentially-spaced-apart, radially-aligned embossed sector areas which indicate data storage tracks. The sector areas include embossed signals which indicate track following information, and in a second area which trails the track-following information, track-seeking information is carried by the embossed signals. A magnetooptic coating covers the entire disk including the embossed sector areas. Readback clock synchronization signals are recorded over the track seeking area to enable synchronizing a readback phase locked loop such that more of the areas between adjacent sector areas can be used for recording data signals. During track seeking, the track seek controlling embossed signals are read using intensity demodulation, while in track following, during a readback, the clock signals recorded over the embossing are read for synchronizing the readback circuits. During recording, the synchronization signals are recorded over the embossed area dedicated to track seeking.
摘要翻译：磁光盘具有周向间隔开的径向对准的浮雕扇区，其指示数据存储轨道。扇区包括指示轨道跟随信息的压纹信号，并且在跟踪跟踪信息的第二区域中，追踪信息由压印信号承载。磁光涂层覆盖整个盘，包括压花扇区。回读时钟同步信号被记录在磁道寻找区域上以使同步回读锁相环，使得相邻扇区之间的更多的区域可用于记录数据信号。在追踪追踪期间，利用强度解调来读取追踪控制压纹信号，而在跟踪期间，在回读期间读取记录在压花上的时钟信号，以使回读电路同步。在记录期间，同步信号被记录在专用于追踪寻找的浮雕区域上。

6. 发明授权

US5050144A Recording intensity modulated signals and polarization-modulated optical signals in the same area of a storage member 失效
标题翻译：在存储构件的相同区域中记录强度调制信号和偏振调制光信号
公开(公告)号：US5050144A
公开(公告)日：1991-09-17
申请号：US449260
申请日：1989-12-11
申请人： Ian E. Henderson , Morovat Tayefeh
发明人： Ian E. Henderson , Morovat Tayefeh
IPC分类号： G11B20/12 , G11B7/013 , G11B7/085 , G11B11/10 , G11B11/105 , G11B19/02 , G11B27/24 , G11B27/28
CPC分类号： G11B7/24085 , G11B11/10565 , G11B11/10578 , G11B11/10584 , G11B11/10597 , G11B19/02 , G11B27/24 , G11B27/28 , G11B7/085 , G11B2220/2525
摘要： A magnetooptic disk has circumferentially-spaced-apart, radially-aligned embossed sector areas which indicate data storage tracks. The sector areas include embossed signals which indicate track-following information, and in a second area which trails the track-following information, track-seeking information is carried by the embossed signals. A magnetooptic coating covers the entire disk including the embossed sector areas. Readback clock synchronization signals are recorded over the track-seeking area to enable synchronizing a readback phase-locked loop such that more of the areas between sector areas can be used for recording data signals. During track seeking, the track seek controlling embossed signals are read using intensity demodulation, while in track following, during a readback, the clock signals recorded over the embossing are read for synchronizing the readback circuits. During recording, the synchronization signals are recorded over the embossed area dedicated to track seeking.

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