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1. 发明授权

US06898221B2 Apparatus for frequency tuning and locking and method for operating same 失效
标题翻译：用于频率调谐和锁定的装置及其操作方法
公开(公告)号：US06898221B2
公开(公告)日：2005-05-24
申请号：US10099414
申请日：2002-03-15
申请人： Jill D. Berger , Subrata K. Dutta , Alan A. Fennema , Olga A. Gorbounova , Stephen J. Hrinya , Fedor A. Ilkov , David A. King , Heather L. Tavernier , Alexander A. Tselikov
发明人： Jill D. Berger , Subrata K. Dutta , Alan A. Fennema , Olga A. Gorbounova , Stephen J. Hrinya , Fedor A. Ilkov , David A. King , Heather L. Tavernier , Alexander A. Tselikov
IPC分类号： H01S5/06 , H01S5/0687 , H04B10/155 , H01S3/13 , H01S3/10
CPC分类号： H04B10/504 , H01S5/0617 , H01S5/0687 , H04B10/503 , H04B10/506 , H04B10/564 , H04B10/572
摘要： An apparatus comprising a first reference element having an output power that varies monotonically with input frequency over an operating frequency range and receiving at least a portion of an output beam of light from an optical source. A second reference element having an output power that is frequency dependent receives at least a portion of the output beam of light. A first optical detector measures the power of a first reference beam of light from the first reference element. A second optical detector measures the power of a second reference beam of light from the second reference element. Electronic circuitry is coupled to the first and second optical detectors for receiving first and second reference signals therefrom and producing a coarse error signal for permitting coarse adjustment and a fine error signal for permitting fine adjustment of the frequency of the output beam of light.
摘要翻译：一种装置，包括具有输出功率的第一参考元件，所述输出功率在工作频率范围内与输入频率单调变化，并且接收来自光源的输出光束的至少一部分。具有频率依赖性的输出功率的第二参考元件接收输出光束的至少一部分。第一光学检测器测量来自第一参考元件的第一参考光束的光焦度。第二光学检测器测量来自第二参考元件的第二参考光束的光焦度。电子电路耦合到第一和第二光学检测器，用于从其接收第一和第二参考信号，并产生用于允许粗略调整的粗略误差信号和用于允许微调输出光束的频率的精细误差信号。

2. 发明授权

US06912235B2 Apparatus and method for phase control of tunable external cavity lasers 有权
标题翻译：可调外腔激光器的相位控制装置和方法
公开(公告)号：US06912235B2
公开(公告)日：2005-06-28
申请号：US10210039
申请日：2002-07-31
申请人： Douglas W. Anthon , Jill D. Berger , Alexander A. Tselikov , Stephen J. Hrinya , Howard S. Lee , Alan A. Fennema , Man F. Cheung
发明人： Douglas W. Anthon , Jill D. Berger , Alexander A. Tselikov , Stephen J. Hrinya , Howard S. Lee , Alan A. Fennema , Man F. Cheung
IPC分类号： H01S5/042 , H01S5/0687 , H01S5/14 , H01S3/098 , H01S3/13
CPC分类号： H01S5/141 , H01S5/042 , H01S5/0687 , H01S5/143
摘要： An apparatus and method for controlling the phase of a tunable laser is provided. Stabilization of the mode of a laser beam is provided as the laser is tuned to a target frequency. For one embodiment, a laser generates a reference beam and an output beam. The power of each of beam is measured by optical detectors, and a ratio thereof is utilized to detect when a mode hop occurs as the laser is coarsely tuned. The average of the pre and post mode hop ratios is utilized as a control setpoint while finely tuning the laser to the target frequency. Wavelength lockers, optical power dividers and optical detectors are utilized to determine power levels of the reference and output beams while also monitoring frequency characteristics thereof. A control unit utilizes the outputs from the wavelength locker to control the operation of the extended cavity laser during and after tuning.
摘要翻译：提供了一种用于控制可调激光器的相位的装置和方法。当激光被调谐到目标频率时，提供激光束的模式的稳定性。对于一个实施例，激光器产生参考光束和输出光束。每个光束的功率由光学检测器测量，并且其比例用于检测当激光器被粗调谐时何时出现模式跳跃。将前和后模式跳比的平均值用作控制设定值，同时将激光器精细地调谐到目标频率。利用波长锁定器，光功率分配器和光学检测器来确定参考和输出光束的功率电平，同时还监视其频率特性。控制单元利用来自波长锁定器的输出来调节调谐期间和之后的扩展腔激光器的操作。

3. 发明授权

US07518816B2 Method and apparatus for disc drive data security using fields in servo wedges 有权
标题翻译：用于磁盘驱动器数据安全的方法和装置，使用伺服楔中的磁场
公开(公告)号：US07518816B2
公开(公告)日：2009-04-14
申请号：US10870866
申请日：2004-06-16
申请人： Alan A. Fennema , Gayle L. Noble
发明人： Alan A. Fennema , Gayle L. Noble
IPC分类号： G11B19/04 , G11B5/02 , G06F12/14 , H04K1/00
CPC分类号： G11B20/00086 , G11B7/0045 , G11B7/00745 , G11B19/122 , G11B20/00123 , G11B20/0021 , G11B20/00253 , G11B20/00297 , G11B20/00449 , G11B20/00492 , G11B20/00659 , G11B2220/2516
摘要： The present invention includes a method and apparatus to write and read copy protected data on a disc drive storage system by encoding and decoding data to be copy protected using servo wedge data as the encoding element. In one aspect, the drive is marked by a number generated from the servo wedge data.
摘要翻译：本发明包括一种通过使用伺服楔形数据作为编码元件对要进行复制保护的数据进行编码和解码来将读取保护的数据写入和读取在盘驱动器存储系统上的方法和装置。在一个方面，驱动器由从伺服楔形数据产生的数字标记。

4. 发明授权

US5060210A Controlling head seeking speed in disk storage units by limiting displacement of head with respect to its supporting headarm 失效
标题翻译：通过限制头相对于其支撑头臂的位移来控制磁盘存储单元中的磁头寻道速度
公开(公告)号：US5060210A
公开(公告)日：1991-10-22
申请号：US589706
申请日：1990-09-28
申请人： Alan A. Fennema , Reed A. Hancock
发明人： Alan A. Fennema , Reed A. Hancock
IPC分类号： G11B5/55 , G11B7/085 , G11B11/105 , G11B21/08
CPC分类号： G11B21/085 , G11B11/10556 , G11B5/5556 , G11B7/08517 , G11B7/08588
摘要： In a "piggy-back" head support system, a fine actuator which carries the head (lens or transducer) is controlled to move the head. A coarse actuator or headarm movably supports the fine actuator and is mounted on a frame for movement radially of the signal storage disk. The head scans tracks on the disk. A servo actuates the coarse actuator to follow the movements of the fine actuator. In a seek, the fine coarse actuator may not be able to follow the fine actuator resulting in the fine actuator hitting a safety stop. When this happens, seek errors occur. According to the invention, the relative displacement of the fine actuator with respect to the coarse actuator is limited during predetermined portions of a seek operation, i.e., the high speed accelerate and decelerate portions.

5. 发明授权

US4519553A Multiple spindle winding apparatus 失效
标题翻译：多轴卷绕装置
公开(公告)号：US4519553A
公开(公告)日：1985-05-28
申请号：US626948
申请日：1984-07-02
申请人： Jesse L. Campbell , Alan A. Fennema , Robert B. Henderson , William G. Rance, Jr. , Paul H. Whittington , William O. Wightman, Jr.
发明人： Jesse L. Campbell , Alan A. Fennema , Robert B. Henderson , William G. Rance, Jr. , Paul H. Whittington , William O. Wightman, Jr.
IPC分类号： B65H19/28 , G11B23/113 , B31F5/04 , B65C3/12
CPC分类号： B65H19/28 , G11B23/113
摘要： Winding apparatus for continuously winding tape media upon reels contained within closed cartridges. The winding apparatus includes means for supplying cartridges alternatively to three separate in-line winding channels all of which perform a winding function and then collecting the wound cartridges off the individual lines and presenting an output station for a subsequent packing operation. Each channel includes vacuum extension means for reaching through an opening in each cartridge to apply an adhesive patch to the hub of the reel contained within the cartridge. Each line also includes means for continuously supplying tape media to a wind station for winding upon the reels passing through that line. At the wind station, additional vacuum means bring the leading edge of the media into the cartridge and press it against the adhesive patch, thereby attaching the media to the reel. Means are provided for winding the attached media upon the reel to one of the predetermined category of sizes, and then severing the media while maintaining control of the supply end for feeding it to the next cartridge. At a following station a leader block is applied to the trailing edge of the media associated with each completed reel to complete the winding operation. Cleaning and ID printing stations are also provided, if desired.
摘要翻译：卷绕装置用于在包含在封闭的盒内的卷轴上连续卷绕带介质。卷绕装置包括用于将三个单独的在线卷绕通道提供给三个单独的在线卷绕通道的装置，所述三个单独的在线卷绕通道执行卷绕功能，然后将卷绕的筒从各个线路收集并呈现用于随后的打包操作的输出站。每个通道包括用于到达每个筒中的开口的真空延伸装置，以将粘合贴片施加到容纳在盒中的卷轴的轮毂上。每条线还包括用于将卷带介质连续地供应到风站以绕过通过该线的卷轴的装置。在风站，额外的真空装置将介质的前缘带入墨盒中并将其压靠在粘合贴片上，从而将介质附着到卷轴上。提供了用于将附着的介质卷绕到卷轴上的预定类别的尺寸之一的装置，然后在维持供给端的控制以将其输送到下一个盒的同时切断介质。在随后的站处，将引导块应用于与每个完成的卷轴相关联的介质的后缘以完成卷绕操作。如果需要，还提供清洁和ID印刷站。

6. 发明授权

US5425013A Relative position sensing calibration for optical storage device 失效
标题翻译：光存储设备的相对位置传感校准
公开(公告)号：US5425013A
公开(公告)日：1995-06-13
申请号：US151238
申请日：1993-11-12
申请人： Alan A. Fennema , Timothy S. Gardner , Brian G. Goodman , Yoshihiro Hirasaka
发明人： Alan A. Fennema , Timothy S. Gardner , Brian G. Goodman , Yoshihiro Hirasaka
IPC分类号： G11B7/085 , G11B7/00
CPC分类号： G11B7/08505
摘要： A relative position error signal is calibrated in an optical storage device in which a tracking error signal (TES) varies as the light beam shifts its position through the objective lens. The calibration is performed by moving the coarse carriage to a predetermined region of the optical disk and measuring the TES. The fine actuator is adjusted until the tracking error signal equals a predetermined value. Then, the relative position error signal is read and an adjustment to the RPE gain is calculated to bring the gain to a predetermined value. The adjusted gain is used during normal disk access operations.
摘要翻译：相对位置误差信号在光存储装置中被校准，其中跟踪误差信号（TES）随着光束将其位置偏移通过物镜而变化。通过将粗滑架移动到光盘的预定区域并测量TES来执行校准。微调致动器被调整直到跟踪误差信号等于预定值。然后，读取相对位置误差信号，并计算对RPE增益的调整，以使增益达到预定值。在正常磁盘访问操作期间使用调整后的增益。

7. 发明授权

US5138594A Reducing amplitude variations of optical disk readback signals and increasing reliability of track-crossing counts 失效
标题翻译：降低光盘读取信号的幅度变化，提高轨道交叉点的可靠性
公开(公告)号：US5138594A
公开(公告)日：1992-08-11
申请号：US512308
申请日：1990-04-20
申请人： Alan A. Fennema , Benjamin C. Fiorino
发明人： Alan A. Fennema , Benjamin C. Fiorino
IPC分类号： G11B7/085 , G11B7/09 , G11B7/095 , G11B19/04
CPC分类号： G11B7/0948 , G11B19/04 , G11B7/08541
摘要： An optical disk recorder includes disk reflectance calibration means for measuring variations in disk reflectance over the recording area of the disk. Correction factors based on measured reflectance for adjusting sensed signal level and gain reduce the effects of varying reflectance on the sensed signal. In a preferred embodiment, the sensed signal is employed as a signal in quadrature to a tracking error signal for ensuring reliable track counting in a track seeking operation. In a grooved medium, reflectance is calibrated for both grooves and mesas between the grooves.

8. 发明授权

US5136569A Optical disk recorder for diverse media types and having a predetermined initialization or start-up procedure 失效
标题翻译：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
申请人： Alan A. Fennema , Blair I. Finkelstein , Morovat Tayefeh , Raymond Yardy
发明人： Alan A. Fennema , Blair I. Finkelstein , Morovat Tayefeh , Raymond Yardy
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.

9. 发明授权

US5128913A Acquiring focus in an optical system using a soft focus acquiring system 失效
标题翻译：在使用软焦点采集系统的光学系统中获取焦点
公开(公告)号：US5128913A
公开(公告)日：1992-07-07
申请号：US533305
申请日：1990-06-04
申请人： Alan A. Fennema , Spencer D. Roberts
发明人： Alan A. Fennema , Spencer D. Roberts
IPC分类号： G02B7/28 , G02B7/18 , G11B7/085 , G11B7/09
CPC分类号： G11B7/08511 , G11B7/0908
摘要： The focus acquisition system on optical disk recorder as well as other optical systems, uses repeated pulse position pulses with interlead coasting of an objective lens for providing a soft focus acquire. The pulse energization of the lens to move toward an in-focus condition overcomes stiction and friction. While the coasting allows the energy level applied to the lens movement to be minimal, i.e. soft, the purpose of the interdirectional pulse control actuation is to overcome friction without requiring large power to the lens which can cause an overshoot of the lens at the in-focus position. Compensation techniques and stopping the lens at the in-focus position are also shown.

10. 发明授权

US5046060A Servo error controls 失效
标题翻译：伺服错误控制
公开(公告)号：US5046060A
公开(公告)日：1991-09-03
申请号：US538049
申请日：1990-06-14
申请人： William W. Chow , Alan A. Fennema , Ronald J. Kadlec
发明人： William W. Chow , Alan A. Fennema , Ronald J. Kadlec
IPC分类号： G05D3/12 , G11B7/085 , G11B7/09 , G11B21/10
CPC分类号： G11B7/085 , G11B7/0946
摘要： In a disk recorder, unintended radial portions of a transducer or head, herein termed "skating", is rapidly controlled and stopped before the transducer or head can hit a crash stop. Even when a braking operation is effected in the wrong direction, the skating compensation reverses the braking operation for rapidly stopping the radial motion of a transducer. A pair of clamp circuits are electrically interposed between the servo actuator drive signal generation and a run-out compensation circuit such that the clamping operation does not alter the run-out compensation. The sequences of machine states for effecting the state accommodation are described.

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