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1. 发明授权

US4571714A Read beam position calibration 失效
标题翻译：读取光束位置校准
公开(公告)号：US4571714A
公开(公告)日：1986-02-18
申请号：US628685
申请日：1984-07-06
申请人： Harlan P. Mathews , Paul Romano , Alexander M. Muckle
发明人： Harlan P. Mathews , Paul Romano , Alexander M. Muckle
IPC分类号： G11B7/013 , G11B7/085 , G11B7/09 , G11B23/36 , G11B7/00
CPC分类号： G11B7/24085 , G11B23/36 , G11B7/08547 , G11B7/09 , G11B7/0903
摘要： A system and method for optically measuring and maintaining track pitch in an optical storage system. A set of at least four calibration tracks, each having a prescribed track pitch or distance therebetween, are precisely placed on a recording medium of the optical storage system during the manufacture thereof. When this recording medium is subsequently inserted into the optical storage system, the track pitch of a select pair of the calibration tracks is optically measured by maximizing the amplitude of a data read radiation beam, and an offset signal is generated in response to this measurement. This offset signal is used within the optical storage system for controllably positioning a second radiation beam with respect to a first radiation beam, the first radiation beam being directed to follow a previously written data track on the recording medium. The offset signal may be stored so that it need only be generated during an initialization or calibration mode of the optical storage system, and thereafter be readily available for positioning the second radiation beam relative to the first radiation beam. The select pair of calibration tracks may be an inner pair, having additional tracks adjacent both sides thereof, or an outer pair, having an additional track adjacent only one side thereof; thereby having included in the offset signal the optical effects of having additional data tracks adjacent or not adjacent the respective sides of the pair of calibration tracks whose track pitch is being measured.
摘要翻译：一种用于在光学存储系统中光学测量和维持光道间距的系统和方法。在光学存储系统的制造期间，精确地将一组至少四个校准轨道（每个具有规定的轨距或距离）放置在光存储系统的记录介质上。当该记录介质随后插入到光学存储系统中时，通过最大化数据读取辐射束的振幅来光学地测量选择的一对校准轨迹的轨道间距，并且响应于该测量产生偏移信号。该偏移信号用于光学存储系统中，用于相对于第一辐射束可控地定位第二辐射束，第一辐射束被引导以跟随记录介质上的先前写入的数据轨道。可以存储偏移信号，使得其仅需要在光学存储系统的初始化或校准模式期间产生，并且此后可以容易地用于相对于第一辐射束定位第二辐射束。选择的一对校准轨道可以是内对，具有邻近其两侧的附加轨道或外对，具有仅与其一侧相邻的附加轨道; 从而在偏移信号中包括具有与正在测量其轨道间距的一对校准轨道的相应侧相邻或不相邻的附加数据轨迹的光学效果。

2. 发明授权

US4578786A Track pitch calibration system for use in optical storage devices 失效
标题翻译：轨道音调校准系统用于光学存储设备
公开(公告)号：US4578786A
公开(公告)日：1986-03-25
申请号：US628687
申请日：1984-07-06
申请人： Robert McIntosh , Harlan P. Mathews , David W. Rickert , Paul Romano , Jerry Walker
发明人： Robert McIntosh , Harlan P. Mathews , David W. Rickert , Paul Romano , Jerry Walker
IPC分类号： G11B7/085 , G11B7/00
CPC分类号： G11B7/08505
摘要： A system and method for maintaining a prescribed track pitch in an optical storage system wherein a second radiation beam is aligned a desired distance from a first radiation beam, the first radiation beam being controllably steered to follow a previously written data track on a record carrier used within the optical storage system. A write alignment servo aligns the second radiation beam the prescribed distance from the first radiation beam in response to an offset signal. The offset signal is generated by optically measuring the distance between a pair of calibration tracks that have previously been placed on the disk so as to have the desired track pitch therebetween. The effect of variations or drift occurring in the optical or electrical components of either the write alignment servo or the optical track pitch measurement system is significantly reduced by regularly calibrating against the fixed track pitch of the calibration tracks.
摘要翻译：一种用于在光学存储系统中维持规定的轨道间距的系统和方法，其中第二辐射束与第一辐射束对准所需的距离，所述第一辐射束被可控地转向以遵循使用的记录载体上的先前写入的数据轨道在光存储系统内。写对齐伺服器响应于偏移信号将第二辐射束对准与第一辐射束规定距离。通过光学测量先前已经放置在盘上的一对校准轨道之间的距离来产生偏移信号，以便在它们之间具有期望的轨距。通过针对校准轨道的固定轨道间距进行定期校准，显着地减少了写对准伺服或光轨俯仰测量系统的光学或电气部件中出现的变化或漂移的影响。

3. 发明授权

US4965782A Off-track bit shift compensation apparatus 失效
标题翻译：离轨位移补偿装置
公开(公告)号：US4965782A
公开(公告)日：1990-10-23
申请号：US199242
申请日：1988-05-26
申请人： Harlan P. Mathews
发明人： Harlan P. Mathews
IPC分类号： G11B7/004 , G11B7/09
CPC分类号： G11B7/004 , G11B7/0901
摘要： Many of the data read errors encountered in an optical disk system are due to reading off track. These errors are the result of bit shift, which is the shifting of the data transition relative to the center of the detection timing window. This bit shift is the result of the rounded edges of the data marks on the recording medium. A normal data signal is read off the recording medium while the read apparatus is centeed on the data storage track of the recording medium. If the read beam of the read apparatus moves off track radially to either side of the center of the data storage track, the detected data transitions move toward each other due to the rounded edges of the recorded data on the data storage track. This makes the data mark appear shorter and results in bit shift and increased error rate. The off-track bit shift compensation apparatus compensates for this misalignment and the resultant bit shift by dynamically adjusting the analog detection threshold of the read apparatus. The modification of the detection threshold makes the data bit written on the data storage track appear longer. Thus, if the detection threshold is lowered slightly, the detected data transitions will be shifted back to the zero position associated with the read apparatus being centered on the data storage track of the optical disk. This allows the use of both edges of the recorded mark to contain information, thereby doubling the capacity over systems which use the entire mark as a data transition.
摘要翻译：在光盘系统中遇到的许多数据读取错误是由于读取轨迹。这些错误是位移的结果，这是相对于检测定时窗口中心的数据转换的移位。该位移是记录介质上的数据标记的圆形边缘的结果。当读取装置在记录介质的数据存储轨道中心时，正常数据信号从记录介质上读出。如果读取设备的读取光束径向离开轨道到数据存储轨道中心的任一侧，则由于数据存储轨道上的记录数据的倒圆的边缘，检测到的数据转变朝向彼此移动。这使得数据标记看起来更短，并导致位移和增加错误率。离轨比特移位补偿装置通过动态地调整读取装置的模拟检测阈值来补偿该失准和结果位移。检测阈值的修改使得写入数据存储轨道的数据位显得更长。因此，如果检测阈值稍微降低，则检测到的数据转换将被移回到与以光盘的数据存储轨道为中心的读取装置相关联的零位置。这允许使用记录标记的两个边缘来包含信息，从而将使用整个标记的系统的容量加倍为数据转换。

4. 发明授权

US4577301A Track pitch calibration error reduction 失效
标题翻译：履带间距校准误差降低
公开(公告)号：US4577301A
公开(公告)日：1986-03-18
申请号：US628686
申请日：1984-07-06
申请人： Harlan P. Mathews , Craig Cambier
发明人： Harlan P. Mathews , Craig Cambier
IPC分类号： G01B11/14 , G11B7/004 , G11B7/007 , G11B7/08 , G11B7/09 , G11B7/00
CPC分类号： G11B7/0938 , G01B11/14 , G11B7/004 , G11B7/08 , G11B7/09 , G11B7/24079
摘要： A system and method for optically measuring and maintaining track pitch in an optical storage system. A set of at least four calibration tracks, each having a prescribed track pitch or distance therebetween, are precisely placed on a record carrier of the optical storage system during the manufacture thereof. When this record carrier is subsequently inserted into the optical storage system, the track pitch of a select pair of the calibration tracks is optically measured, and an offset signal is generated in response to this measurement. This offset signal is used within the optical storage system for controllably positioning a second radiation beam with respect to a first radiation beam, the first radiation beam being directed to follow a previously written data track on the record carrier. The offset signal may be stored so that it need only be generated during an initialization or calibration mode of the optical storage system, and thereafter be readily available for positioning the second radiation beam relative to the first radiation beam. The select pair of calibration tracks may be an inner pair, having additional tracks adjacent both sides thereof, or an outer pair, having an additional track adjacent only one side thereof; thereby having included in the offset signal the optical effects of having additional data tracks adjacent or not adjacent the respective sides of the pair of calibration tracks whose track pitch is being measured.
摘要翻译：一种用于在光学存储系统中光学测量和维持光道间距的系统和方法。一组至少四个校准轨道，每个具有规定轨道间距或距离的校准轨道，在其制造期间精确地放置在光存储系统的记录载体上。当该记录载体随后插入到光学存储系统中时，光学地测量一对校准轨道的轨道间距，并且响应于该测量产生偏移信号。该偏移信号用于光学存储系统中，用于相对于第一辐射束可控地定位第二辐射束，第一辐射束被引导以跟随记录载体上的先前写入的数据轨道。可以存储偏移信号，使得其仅需要在光学存储系统的初始化或校准模式期间产生，并且此后可以容易地用于相对于第一辐射束定位第二辐射束。选择的一对校准轨道可以是内对，具有邻近其两侧的附加轨道或外对，具有仅与其一侧相邻的附加轨道; 从而在偏移信号中包括具有与正在测量其轨道间距的一对校准轨道的相应侧相邻或不相邻的附加数据轨迹的光学效果。

5. 发明授权

US4374386A Force-temperature stabilization of an electromagnetic device 失效
标题翻译：电磁装置的强度稳定
公开(公告)号：US4374386A
公开(公告)日：1983-02-15
申请号：US264379
申请日：1981-05-15
申请人： Carl R. Bildstein , Harry P. Heibein , Harlan P. Mathews
发明人： Carl R. Bildstein , Harry P. Heibein , Harlan P. Mathews
IPC分类号： B41J2/175 , B41J23/32 , H01F7/18 , G01D15/18
CPC分类号： H01F7/1805 , B41J2/17596
摘要： An ink jet pump is switched from a mechanically off or idle state to a mechanically on or active state with no drift in pressure output by maintaining the pump at the same point in its force-temperature characteristic when it is on and off. This is accomplished by driving the pump in both the active and idle states with signals that dissipate the same amount of power in the pump. The frequency of the idle state signal is high enough that the pump can not mechanically respond. The power dissipations in the active and idle states are matched by adjusting the current build-up and current decay through the coil of the pump during the idle state. When the RMS current through the coil in the active state equals the RMS current in the idle state, the power dissipations are matched.
摘要翻译：当喷射泵打开和关闭时，通过将泵保持在其强度 - 温度特性的相同点，将喷墨泵从机械关闭或空闲状态切换到机械打开或活动状态，而不会在压力输出中发生漂移。这是通过在主动和空闲状态下驱动泵来实现的，该信号在泵中消耗相同的功率量。空闲状态信号的频率足够高，使得泵不能机械响应。在空闲状态期间，通过调节电流通过泵的线圈的电流积分和电流衰减来调节有功和空闲状态下的功率消耗。当通过有源状态的线圈的RMS电流等于空闲状态下的RMS电流时，功率耗散被匹配。

6. 发明授权

US5420726A Channel qualifier for a hard disk drive which differentiates a raw data signal before peak detection and qualification of the signal 失效
标题翻译：用于硬盘驱动器的通道限定符，用于在峰值检测和信号鉴定之前区分原始数据信号
公开(公告)号：US5420726A
公开(公告)日：1995-05-30
申请号：US198107
申请日：1994-02-17
申请人： Harlan P. Mathews , Robert E. Gercken , Patrick L. Adcock
发明人： Harlan P. Mathews , Robert E. Gercken , Patrick L. Adcock
IPC分类号： G11B5/09 , G11B20/10 , G01R33/12
CPC分类号： G11B5/09 , G11B20/10009
摘要： A differentiating qualifier channel in a hard disk drive. The analog signal read off a magnetic disk by the transducer is amplified and filtered, then immediately differentiated. This differentiated waveform is used to both qualify and to detect the peaks of the analog read signal. Data pulses are qualified by noting that the differentiated waveform always changes polarity after the zero-crossing of a valid peak. Positive and negative peak signals are generated whenever the differentiated waveform exceeds established positive and negative thresholds. From this, a polarity signal is constructed. The pulses indicating where the polarity signal changes states are used to enable a latch. The latch is clocked by a zero-crossings signal which has been delayed such that the zero-crossings occur after the change in polarity. The output from this latch gives the valid qualified data pulses.
摘要翻译：硬盘驱动器中的区分限定符通道。由换能器读取磁盘的模拟信号被放大并过滤，然后立即区分。这种微分波形用于限定和检测模拟读取信号的峰值。数据脉冲通过注意到有效峰过零后，微分波形总是改变极性来限定。每当差分波形超过建立的正和负阈值时，产生正和负峰值信号。由此构成极性信号。指示极性信号改变状态的脉冲用于使能锁存器。锁存器由过零点信号计时，该过零点信号已被延迟，使得在极性变化之后发生过零点。该锁存器的输出给出有效的合格数据脉冲。

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