公开(公告)号：US06563779B1

公开(公告)日：2003-05-13

申请号：US09595433

申请日：2000-06-15

申请人： Mark E. McDonald ,  Robert R. McLeod ,  Andrew J. Daiber

发明人： Mark E. McDonald ,  Robert R. McLeod ,  Andrew J. Daiber

IPC分类号： G11B700

CPC分类号： G11B7/0938 ,  G11B7/00781 ,  G11B7/0901 ,  G11B7/1381 ,  G11B7/24044 ,  G11B2007/0013

摘要： A tracking error signal generation apparatus and method which utilizes confocal detection with a split detector and a differencing circuit for generation of tracking error signals. A first lens is positioned in the path of a light beam returning from an optical medium. A pinhole is positioned in the path of the light beam after the first lens and proximate to the focal plane of the first lens. A second lens is positioned in the path of the light beam after the pinhole, and a split detector, having equal halves is positioned in the path of the light beam after the second lens. A differencing circuit is operatively coupled to each of the halves of the split detector. In operation, a light beam is focused by an optical head onto a track in the optical medium, and the reflection of the beam from the optical medium is directed through the first lens, through the pinhole, through the second lens, and onto the split detector. When the focus of the light beam is centered on the track, the reflected light reaching the split detector is evenly distributed on the two halves of the detector, such that the differencing circuit will generate a tracking error signal (TES) having nominally a zero value. When the focus of the light beam is off-center with respect to the track, the reflected light received by detector is unevenly distributed on the two halves of the detector such that the differencing circuit generates a non-zero tracking error signal, which will be of positive or negative value depending upon the direction off-center of the light beam focus spot. The tracking error signals thus generated are communicated to a servo system which will reposition the optical head to maintain the light beam focus spot on the center of the track.

摘要翻译： 一种跟踪误差信号产生装置和方法，其利用具有分离检测器的共焦检测和用于产生跟踪误差信号的差分电路。 第一透镜位于从光学介质返回的光束的路径中。 针孔位于第一透镜之后的光束的路径中并且靠近第一透镜的焦平面。 第二透镜位于针孔之后的光束的路径中，并且具有相等的一半的分割检测器位于第二透镜之后的光束的路径中。 差分电路可操作地耦合到分离检测器的每个半部。 在操作中，光束被光学头聚焦在光学介质中的轨道上，并且来自光学介质的光束的反射通过第一透镜，穿过针孔穿过第二透镜并被引导到分裂 探测器。 当光束的焦点以轨迹为中心时，到达分割检测器的反射光均匀分布在检测器的两半上，使得差分电路将产生标称为零值的跟踪误差信号（TES） 。 当光束的焦点相对于轨道偏心时，由检测器接收的反射光不均匀地分布在检测器的两半上，使得差分电路产生非零跟踪误差信号，这将是 取决于光束聚焦点的偏心方向的正值或负值。 如此生成的跟踪误差信号被传送到伺服系统，该伺服系统将重新定位光头以将光束聚焦点保持在轨道的中心。

公开(公告)号：US06288986B1

公开(公告)日：2001-09-11

申请号：US09229012

申请日：1999-01-12

申请人： Mark E. McDonald ,  Robert R. McLeod

发明人： Mark E. McDonald ,  Robert R. McLeod

IPC分类号： G11B700

CPC分类号： G11B7/1381 ,  G11B7/0908 ,  G11B7/0916 ,  G11B7/0917

摘要： An improved focus error signal generator device and an optical data delivery and detection system including an optical lens disposed in the path of a return read beam and a birefringent plate disposed in the path of the return beam of light after the optical lens, wherein the birefringent plate provides for a first and second focal plane of corresponding first and second polarization. A pinhole is disposed in the path of the return read beam after the birefringent plate and in close proximity to first and second focal planes. A polarizing beam splitter is positioned after the second focal plane and serves to split the return read beam into two light beams of first and second polarization. First and second detectors are disposed in the path of corresponding first and second polarization light beams. The detectors are connected to the inputs of an electrical differencing circuit that has an output to an optical head servo system.

摘要翻译： 一种改进的聚焦误差信号发生器装置和光学数据传送和检测系统，包括设置在返回读取光束的路径中的光学透镜和布置在光学透镜之后的返回光束的路径中的双折射板，其中双折射 板提供相应的第一和第二极化的第一和第二焦平面。 在双折射板之后并且靠近第一焦平面和第二焦平面，针孔设置在返回读取光束的路径中。 偏振分束器位于第二焦平面之后，用于将返回读取光束分成两束第一和第二偏振光束。 第一和第二检测器设置在对应的第一和第二偏振光束的路径中。 检测器连接到具有输出到光头伺服系统的电差分电路的输入端。

公开(公告)号：US6020985A

公开(公告)日：2000-02-01

申请号：US191314

申请日：1998-11-13

申请人： Robert R. McLeod ,  Sergei L. Sochava ,  Andrew J. Daiber ,  Mark E. McDonald ,  Lambertus Hesselink ,  Ingolf Sander ,  Timothy M. Slagle

发明人： Robert R. McLeod ,  Sergei L. Sochava ,  Andrew J. Daiber ,  Mark E. McDonald ,  Lambertus Hesselink ,  Ingolf Sander ,  Timothy M. Slagle

IPC分类号： G11B7/00 ,  G11B7/003 ,  G11B7/0065 ,  G11B7/125 ,  G11B7/135 ,  G11B15/62 ,  G03H1/26

CPC分类号： G11B7/1356 ,  G11B15/62 ,  G11B7/0065 ,  G11B7/127 ,  G03H2270/23 ,  G11B2007/0013 ,  G11B7/003 ,  G11B7/135

摘要： Digital data bits are stored as discrete-level reflection microholograms in a multi-depth digital optical data storage system. Reference and signal beams are incident in a counterpropagating geometry on opposite faces of a tape. The reflection microholograms are stored at the coinciding focus of the reference and signal beams. The holograms are stored at the diffraction limit of high-N.A. optics, and have relatively high grating frequencies and small sizes. Dynamic aberration compensators correct for the depth-varying spherical aberration imparted to the beams by the medium. Multiple mutually-incoherent lasers are used for parallel storage and retrieval to increase data transfer rates. Achievable densities and signal-to-noise ratios are substantially higher than for index-perturbation or transmission hologram storage methods.

摘要翻译： 数字数据位作为离散级反射微时刻图存储在多深度数字光学数据存储系统中。 参考信号光束和信号光束以相反的几何形状入射到磁带的相对面上。 反射微积分线存储在参考和信号光束的重合焦点处。 全息图以高N.A的衍射极限存储。 光学元件，并具有较高的光栅频率和小尺寸。 动态像差补偿器校正由介质赋予光束的深度变化的球面像差。 多个相互不相干的激光器用于并行存储和检索以提高数据传输速率。 可实现的密度和信噪比显着高于指数扰动或透射全息图存储方法。

公开(公告)号：US6111828A

公开(公告)日：2000-08-29

申请号：US229140

申请日：1999-01-12

申请人： Robert R. McLeod ,  Mark E. McDonald

发明人： Robert R. McLeod ,  Mark E. McDonald

IPC分类号： G11B7/09 ,  G11B7/12

CPC分类号： G11B7/0908 ,  G11B7/094 ,  G11B2007/0013 ,  G11B7/0065

摘要： A focus error signal generator device including first and second optical lenses disposed in the respective paths of first and second light beams derived from the return read beam wherein the first and second optical lens have corresponding points of focus, and first and second detectors disposed in the corresponding paths of the first and second light beams located after the points of focus. First and second pinholes are disposed in the corresponding paths of the first and second light beams after the corresponding optical lens and before the corresponding detector, and an electrical differencing circuit having inputs to the first and second detectors and an output to an optical head servo system. A method for focus error signal includes the steps of focussing first and second light beams derived from a return read beam at corresponding first and second points of focus; providing for first and second detectors disposed in the path of corresponding first and second light beams after corresponding first and second points of focus; providing for first and second pinholes in the path of corresponding first and second light beams; and generating a focus error signal related to the difference between the output of the first detector and an output of the second detector. An optical data delivery and detection system comprises a laser source emitting a light beam, an optical head that receives the light beam, optical lenses within the optical head that focus the light beam on an optical storage media, a data detector that receives the light beam on the beam's return path and provides data signals and the focus error generator device described above.

摘要翻译： 一种聚焦误差信号发生器装置，包括设置在从返回读取光束导出的第一和第二光束的相应路径中的第一和第二光学透镜，其中第一和第二光学透镜具有对应的焦点，第一和第二检测器设置在 位于焦点之后的第一和第二光束的相应路径。 第一和第二针孔布置在相应的光学透镜之后和相应的检测器之前的第一和第二光束的相应路径中，以及电差分电路，其具有到第一和第二检测器的输入以及输出到光学头伺服系统 。 一种用于聚焦误差信号的方法包括以下步骤：在对应的第一和第二聚焦点聚焦从返回读取光束导出的第一和第二光束; 提供布置在对应的第一和第二光束的对应的第一和第二聚焦点的路径中的第一和第二检测器; 在对应的第一和第二光束的路径中提供第一和第二针孔; 以及产生与第一检测器的输出和第二检测器的输出之间的差异相关的聚焦误差信号。 光学数据传送和检测系统包括发射光束的激光源，接收光束的光学头，将光束聚焦在光学存储介质上的光学头内的光学透镜，接收光束的数据检测器 在光束的返回路径上，并提供数据信号和上述聚焦误差发生器装置。

公开(公告)号：US06269057B1

公开(公告)日：2001-07-31

申请号：US09229138

申请日：1999-01-12

申请人： Mark E. McDonald ,  Robert R. McLeod

发明人： Mark E. McDonald ,  Robert R. McLeod

IPC分类号： G11B700

CPC分类号： G11B7/1372 ,  G11B7/0908 ,  G11B7/1381

摘要： An improved focus error signal generator device including two optical lenses in series; a birefringent optical lens followed by a standard optical lens, the lenses being disposed in the path of a return read beam wherein the birefringent optical lens has a first and second focal plane. A pinhole is disposed in the path of the return read beam in close proximity to the first and second focal planes. A polarizing beam splitter is positioned after the second focal plane and serves to split the return read beam into two light beams of polarization associated with the first and second focal planes. First and second detectors are positioned so as to read the two light beams signals output from the polarizing beam splitter and the detectors are connected to an electrical differencing circuit having an output to an optical head servo system.

摘要翻译： 一种改进的聚焦误差信号发生器装置，包括串联的两个光学透镜; 双折射光学透镜后面是标准光学透镜，透镜设置在返回读取光束的路径中，其中双折射光学透镜具有第一和第二焦平面。 针孔布置在返回读取光束的路径中，紧邻第一和第二焦平面。 偏振分束器位于第二焦平面之后，用于将返回读取光束分成与第一和第二焦平面相关联的两个偏振光束。 定位第一和第二检测器以便读取从偏振分束器输出的两个光束信号，并且检测器连接到具有到光学头伺服系统的输出的电差分电路。

公开(公告)号：US07108185B2

公开(公告)日：2006-09-19

申请号：US10402606

申请日：2003-03-28

申请人： Mark E. McDonald

发明人： Mark E. McDonald

IPC分类号： G06K7/10

CPC分类号： H01S5/0014 ,  H01S5/0617 ,  H01S5/06808

摘要： An apparatus comprising a device having calibration data associated therewith, and a calibration tag placed on the device, the calibration tag having encoded thereon the calibration data or a locator identifying where the calibration data can be found. A process comprising calibrating a device to obtain a set of calibration data, generating a calibration tag, the calibration tag having encoded thereon the calibration data or a locator identifying where the calibration data can be found, and placing the calibration tag on the device. Other embodiments are also described and claimed.

摘要翻译： 一种包括具有与其相关联的校准数据的设备的设备和放置在设备上的校准标签，校准标签上已经对其校准数据进行编码，或者定位器标识可以在哪里找到校准数据。 一种过程，包括校准装置以获得一组校准数据，生成校准标签，校准标签上编码有校准数据，或定位器，其识别可以在哪里找到校准数据，以及将校准标签放置在设备上。 还描述和要求保护其他实施例。

公开(公告)号：US06574174B1

公开(公告)日：2003-06-03

申请号：US09549075

申请日：2000-04-15

申请人： James R. Amble ,  Lambrerrtus Hesselink ,  Tokyuki Honda ,  Mark E. McDonald ,  Michael V. Morelli ,  Andrew J. Daiber ,  Herman A. Ferrier ,  Sanjoy Ghose ,  Thomas A. Kridl ,  Matthew Lipson ,  Shunichi Nishimura ,  Sergei Sochava ,  LeRoy A. Volz

发明人： James R. Amble ,  Lambrerrtus Hesselink ,  Tokyuki Honda ,  Mark E. McDonald ,  Michael V. Morelli ,  Andrew J. Daiber ,  Herman A. Ferrier ,  Sanjoy Ghose ,  Thomas A. Kridl ,  Matthew Lipson ,  Shunichi Nishimura ,  Sergei Sochava ,  LeRoy A. Volz

IPC分类号： G11B700

CPC分类号： G11B7/0065 ,  G11B7/007 ,  G11B7/0938 ,  G11B7/24 ,  G11B7/2433 ,  G11B7/245 ,  G11B7/246 ,  G11B7/2472 ,  G11B7/252 ,  G11B7/2595 ,  G11B2007/0013

摘要： An optical information storage system using optical storage media including multiple data layers or stacks wherein each of the multiple data stacks has a storage density comparable to a conventional single layer optical disk. The optical data storage system comprises an optical medium having a single dedicated servo layer and multiple data stacks which each contain an embedded servo format, a servo laser beam positioned to maintain a first focus point on the dedicated servo reference layer, a read-write laser beam positioned to maintain a second focus point on one of the data stacks, a first, dedicated servo system which provides focus and tracking error correction according to error signals generated from the dedicated servo layer, and a second, embedded servo system which provides focus and tracking error correction according to error signals generated from the data stacks. The dedicated servo layer, in different embodiments of the invention, may be positioned either below or above the data stacks in the optical medium, or interposed between data stacks. The data stacks may comprise discrete physical data layers or “virtual” data layers defined by a format hologram. The servo and read-write lasers may differ in wavelength and/or polarization.

摘要翻译： 一种使用包括多个数据层或堆叠的光学存储介质的光学信息存储系统，其中多个数据堆栈中的每一个具有与常规单层光盘相当的存储密度。 光学数据存储系统包括具有单个专用伺服层的光学介质和各自包含嵌入式伺服格式的多个数据堆栈，定位成将第一焦点保持在专用伺服参考层上的伺服激光束，读写激光器 光束定位成在数据堆叠之一上保持第二焦点，第一专用伺服系统，其根据从专用伺服层产生的误差信号提供聚焦和跟踪误差校正;以及第二嵌入式伺服系统，其提供焦点和 根据从数据堆产生的误差信号进行跟踪误差校正。 在本发明的不同实施例中的专用伺服层可以位于光学介质中的数据堆的下方或上方，或者位于数据堆之间。 数据堆可以包括由格式全息图定义的离散物理数据层或“虚拟”数据层。 伺服和读写激光器的波长和/或极化可能不同。

公开(公告)号：US06288804B1

公开(公告)日：2001-09-11

申请号：US09640906

申请日：2000-08-16

申请人： Andrew J. Daiber ,  Mark E. McDonald

发明人： Andrew J. Daiber ,  Mark E. McDonald

IPC分类号： G02B532

CPC分类号： G03H1/30 ,  G03H2001/0417 ,  G03H2222/31 ,  G03H2230/10 ,  G11B7/0065 ,  G11B7/1362 ,  G11B7/13927

摘要： A positive unit magnification reflective head is used to back-reflect a primary light beam, for storing reflection microholograms at the coincident foci of the primary and reflected beams. Imaging the primary beam focus onto itself at positive unit magnification allows increasing system tolerance to tilts and transverse misalignments between the primary and reflective heads. Holograms are stored at multiple depths in a holographic storage medium. Tunable-focus primary and reflective heads are positioned on opposite sides of the storage medium. The reflective head images each storage location onto itself at positive unit magnification. Suitable reflective heads include: two lenses in an f-2f-f configuration and a planar mirror; a lens and a corner cube; a thin lens and a thick lens with a coated reflective back surface; and a thin lens and a back-coated gradient-index (GRIN) lens. To control the polarization of the reflected beam, the corner cube may include a plastic filler bonded on the back of the reflective surface. The filler index of refraction is chosen such that the primary beam is incident on the reflective surface of the corner cube at the critical angle.

摘要翻译： 正单位放大率反射头用于反射一次光束，用于在初级和反射光束的重合焦点处存储反射微波照相。 将主光束聚焦以正单位放大率成像，可以增加系统对初级和反射头之间的倾斜和横向不对准的容差。 全息图存储在全息存储介质中的多个深度处。 可调聚焦主反射头位于存储介质的相对侧。 反射头以正单位放大率将每个存储位置映射到自身上。 合适的反射头包括：f-2f-f构造的两个透镜和平面镜; 镜头和角落立方体; 薄透镜和具有涂层反射背面的厚透镜; 以及薄透镜和背涂层梯度折射率（GRIN）透镜。 为了控制反射光束的偏振，角隅棱镜可以包括粘合在反射表面背面上的塑料填料。 选择填料折射率使得主光束以临界角入射在角立方体的反射表面上。

公开(公告)号：US07295582B2

公开(公告)日：2007-11-13

申请号：US11170893

申请日：2005-06-30

申请人： Mark E. McDonald ,  Wei Wang

发明人： Mark E. McDonald ,  Wei Wang

IPC分类号： H01S3/10 ,  H01S3/13

CPC分类号： H01S5/02446 ,  H01S3/105 ,  H01S3/1062 ,  H01S5/022 ,  H01S5/02248 ,  H01S5/02415 ,  H01S5/02438 ,  H01S5/141

摘要： Thermo-optic tuning apparatuses and techniques that may be used in external cavity lasers are provided. A wavelength selection device may be placed in the external cavity and may include a thermally responsive substrate and tunable optical elements extending therefrom. Heating and heat monitoring actuators may be formed in the substrate itself, with the tunable optical elements being mechanically positioned in the recesses of the substrate for thermo-optic tuning. In some examples, a separate optical path length adjustment element is also placed in the thermally responsive substrate, or elsewhere, for separate frequency tuning. This adjustment element may be part of a control that is detangled from the normal servo controls used in laser tuning.

公开(公告)号：USD537705S1

公开(公告)日：2007-03-06

申请号：US29237004

申请日：2005-08-25

申请人： Dale M. Evans ,  Mark E. McDonald

设计人： Dale M. Evans ,  Mark E. McDonald