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公开(公告)号：US5018126A
公开(公告)日：1991-05-21
申请号：US504449
申请日：1990-04-04
CPC分类号： G11B27/36 , G11B11/105 , G11B11/10506 , G11B11/10515 , G11B11/10595 , G11B19/04 , G11B20/1883 , G11B7/005 , G11B7/13
摘要： A magnetooptic recorder player provides for residual data checking and media defect checking. Media defect checking is effected by comparing the reflected light intensity of a modulated optical beam with the input data characteristics. A difference between the input data and the detected light intensities represents asperities in the record media. Residual data is checked by selectively gating MO detected signals during recording, which are intermediate the high intensity light beam pulses used for recording signals. Both the detected residual data and detected media asperities are counted for each addressable record storage area on the medium.
摘要翻译： 磁光记录仪播放器提供残留数据检查和介质缺陷检查。 通过将调制光束的反射光强度与输入数据特性进行比较来实现介质缺陷检查。 输入数据和检测到的光强度之间的差异表示记录介质中的粗糙度。 通过在记录期间选择性地选通MO检测信号来检查残留数据，这些信号在用于记录信号的高强度光束脉冲之间。 对于介质上的每个可寻址记录存储区域，对所检测到的残留数据和检测到的介质粗糙度进行计数。
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2.发明授权Calibrating lasers for optical recording using a maximal readback signal amplitude as a criterion 失效使用最大读取信号幅值作为标准进行光学记录的校准激光
公开(公告)号：US5185733A
公开(公告)日：1993-02-09
申请号：US486840
申请日：1990-03-01
IPC分类号： G11B7/00 , G11B7/0045 , G11B7/0055 , G11B7/125 , G11B11/10 , G11B11/105 , G11B20/18 , G11B27/36
CPC分类号： G11B7/126 , G11B11/10502 , G11B11/10595 , G11B20/182 , G11B27/36 , G11B7/0045
摘要： A magnetooptic recorder uses a magnetooptic disk for any predetermined number of radially inward tracks which are designated as calibration tracks. One of the calibration tracks is selected as a laser calibration track. The selected track is high powered erased and a test pattern is written on the track. A test pattern is repeated at diverse levels of laser recording power. A test pattern preferably includes or is limited to the highest frequency to be recorded in the ensuing data recordings. The recorded test pattern is read back with the readback signal amplitude being envelope indicated and detected. A table of signal envelope values is created in a digital computer. The values then are fit to a curve using second order polynomial curve fitting techniques. The maximal readback signal amplitude is then selected from the curve corresponding to laser write power used to obtain that maximum signal amplitude and is then selected as a criteria for indicating the laser write power as well as the erase write power.
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3.发明授权Optical disk recorder for diverse media types and having a predetermined initialization or start-up procedure 失效用于多媒体类型的光盘记录器，并具有预定的初始化或启动程序
公开(公告)号：US5136569A
公开(公告)日：1992-08-04
申请号：US589712
申请日：1990-09-28
IPC分类号： G11B7/00 , G11B7/004 , G11B7/0045 , G11B7/085 , G11B7/09 , G11B7/125 , G11B11/10 , G11B11/105 , G11B19/12
CPC分类号： G11B7/126 , G11B7/0945
摘要： An optical disk recorder is capable of operating with diverse types of optical media. A device initialization procedure is repeated for each receipt of each optical medium. Such procedure includes moving an objective lens to an extreme radial position, defocussing the lens at a most remote position, then calibrating the laser circuits to ensure that the emission of radiation from the laser will not inadvertently destroy signals recorded on the just received medium. Then the medium type is read from the medium and based upon the type indication, various additional calibrating procedures are followed and different sources of laser control values are used for signal exchanging operations between the recorder and received optical medium.
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4.发明授权Detecting magnetooptic and intensity-modulated optical signals with the same detector 失效用相同的检测器检测磁性和强度调制的光信号
公开(公告)号：US5105415A
公开(公告)日：1992-04-14
申请号：US448450
申请日：1989-12-11
申请人： Morovat Tayefeh
发明人： Morovat Tayefeh
IPC分类号： G01J4/04 , G01J1/44 , G11B7/005 , G11B11/10 , G11B11/105
CPC分类号： G11B11/10543 , G11B7/005
摘要： A magnetooptic player reads magnetooptically recorded signals on a disk by using a differential detector. Intermediate areas on a storage member used to store the magnetooptically record signals are sector marks and ID fields formed by undulations in the surface of the disk. Such sector marks and ID fields are read by detecting the intensity modulation in a reading light beam; for detecting such embossed marks and D-ROM disks, one-half of the differential detector is disabled for facilitating such detection in a differentially arranged detector.
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5.发明授权Sensing previously-recorded information while recording or erasing a magnetooptic storage number 失效在记录或擦除磁光存储号码时，感测先前记录的信息
公开(公告)号：US5204847A
公开(公告)日：1993-04-20
申请号：US789865
申请日：1991-11-12
申请人： Morovat Tayefeh
发明人： Morovat Tayefeh
IPC分类号： G11B11/105 , G11B19/02 , G11B27/36
CPC分类号： G11B11/10595 , G11B11/10515 , G11B11/10517 , G11B11/10532 , G11B19/02 , G11B27/36
摘要： A magnetooptic storage member is scanned by a single laser beam. The beam intensity is sufficient to heat a localized area of the storage member to be above the Curie temperature for enabling reversing the remanent magnetization of the localized area. Such localized area is subjected to a magnetic bias field for directing which of the remanent directions shall be assumed in the localized area. The storage member and laser beam are relatively moved such that a front or leading portion of the localized area does not reach the Curie temperature. The light reflected from this leading portion, which moves with the laser beam relative to the storage member, is detected for indicating the initial remanent state of the localized area before any changes are made by the combination of the magnetic bias field and the laser beam.
摘要翻译： 磁光存储元件被单个激光束扫描。 光束强度足以将存储部件的局部区域加热到高于居里温度，以便能够反转局部区域的剩余磁化。 这种局部区域经受磁偏置场，用于指示在局部区域中应该假定哪个剩余方向。 存储构件和激光束相对移动，使得局部区域的前部或前部未达到居里温度。 在通过磁偏置场和激光束的组合进行任何改变之前，检测从与激光束相对于存储构件移动的引导部分反射的光，以指示局部区域的初始剩余状态。
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6.发明授权Recording intensity modulated signals and polarization-modulated optical signals in the same area of a storage member 失效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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7.发明授权Adjustable read channel equalization for error processing in a recordable media drive 失效可调式读通道均衡，用于可记录介质驱动器中的错误处理
公开(公告)号：US5533031A
公开(公告)日：1996-07-02
申请号：US265538
申请日：1994-06-24
CPC分类号： G11B20/10481 , G11B20/10009 , G11B20/10046 , G11B20/1879 , G11B5/09 , G11B2020/183
摘要： In a recordable media drive, error processing is implemented in an adjustable read channel equalizer in which gain and bandwidth values can be selectively adjusted. In a write/verify procedure, the gain value is reduced, while the bandwidth is increased, thereby stressing the read channel during verification of written sectors in order to force the failure of marginal sectors. In an error recovery procedure, when a sector error is encountered, the gain value of the adjustable equalizer is initially increased and a sequence of read retries of the failed sector is initiated.
摘要翻译： 在可记录介质驱动器中，在可调节的读通道均衡器中实现误差处理，其中可以选择性地调整增益和带宽值。 在写/验证过程中，增益值减小，而带宽增加，从而在验证书写扇区期间强调读通道，以强制边缘扇区的故障。 在错误恢复过程中，当遇到扇区错误时，可调均衡器的增益值最初增加，并且发起故障扇区的重试次序列。
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公开(公告)号：US5070495A
公开(公告)日：1991-12-03
申请号：US336479
申请日：1989-04-12
IPC分类号： G11B11/10 , G11B7/00 , G11B7/0045 , G11B7/125 , G11B11/105 , G11B27/36
CPC分类号： G11B7/126 , G11B11/10506 , G11B11/10595 , G11B27/36
摘要： Recording operations for an optical disk recorder are calibrated by adjusting recording power level (light intensity) such that a permissible crosstalk can be detected in adjacent erased tracks. Following the power level calibration, pulse duration or width is calibrated for a predetermined symmetry of recorded pulses along the calibration track. Various sequences and procedures are described. Calibration occurs at a plurality of radially spaced-apart tracks.
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公开(公告)号：US4941139A
公开(公告)日：1990-07-10
申请号：US239863
申请日：1988-09-02
IPC分类号： G11B11/10 , G11B7/00 , G11B7/004 , G11B7/005 , G11B7/0055 , G11B7/13 , G11B11/105 , G11B19/04 , G11B20/18 , G11B27/36
CPC分类号： G11B7/13 , G11B11/10506 , G11B11/10515 , G11B11/10595 , G11B19/04 , G11B20/1883 , G11B27/36 , G11B7/005
摘要： A magnetooptic recorder player provides for residual data checking and media defect checking. Media defect checking is effected by comparing the reflected light intensity of a modulated optical beam with the input data characteristics. A difference between the input data and the detected light intensities represents asperities in the record media. Residual data is checked by selectively gating MO detected signals during recording, which are intermediate the high intensity light beam pulses used for recording signals. Both the detected residual data and detected media asperities are counted for each addressable record storage area on the medium.
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公开(公告)号：US5442618A
公开(公告)日：1995-08-15
申请号：US150896
申请日：1993-11-12
IPC分类号： G11B7/005 , G11B11/105 , G11B20/18 , G11B27/36 , G11B7/00
CPC分类号： G11B11/10595 , G11B20/1816 , G11B27/36 , G11B7/005 , G11B11/10515
摘要： An optical drive provides an internal routine for automatically optimizing the common mode rejection ratio of the magneto-optic data output signal. A microprocessor provides control to a controller module which in turn supplies a plurality of calibration signals to a data detecting portion. The calibration signals modify predetermined parameters of the data detecting portion based upon measuring a predetermined parameter indicative of the common mode rejection ratio. The common mode rejection ratio optimization corrects for mismatches in both the optical elements and in the electronic data circuits.
摘要翻译： 光驱提供用于自动优化磁光数据输出信号的共模抑制比的内部程序。 微处理器向控制器模块提供控制，控制器模块又向数据检测部分提供多个校准信号。 基于测量表示共模抑制比的预定参数，校准信号修改数据检测部分的预定参数。 共模抑制比优化校正了光学元件和电子数据电路中的不匹配。
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