公开(公告)号：US06700686B2

公开(公告)日：2004-03-02

申请号：US10056746

申请日：2002-01-24

申请人： Brian King ,  Michael Tackitt

发明人： Brian King ,  Michael Tackitt

IPC分类号： G03H112

CPC分类号： G11B7/128 ,  G03H1/02 ,  G03H1/12 ,  G03H1/26 ,  G03H1/265 ,  G03H2001/0216 ,  G03H2210/22 ,  G03H2223/24 ,  G11B7/0065 ,  G11B7/13 ,  G11B7/1356 ,  G11B7/1362

摘要： The present invention provides a solution to the needs described above through a system and method for holographic storage. The system comprises a laser light source, a first beam splitter for splitting a light beam into an object and reference beam, an elliptical reflector with a first and second focal point, a reflector rotatable about a first axis and a second axis, a pattern encoder, and a holographic storage medium. The reflector is located at the first focal point of the elliptical mirror, and the holographic storage medium is located at the second focal point of the elliptical mirror.

摘要翻译： 本发明通过用于全息存储的系统和方法提供了上述需求的解决方案。 该系统包括激光源，用于将光束分解成物体和参考光束的第一分束器，具有第一和第二焦点的椭圆形反射器，可围绕第一轴线和第二轴线旋转的反射器，图案编码器 ，和全息存储介质。 反射器位于椭圆镜的第一焦点处，并且全息存储介质位于椭圆镜的第二焦点处。

公开(公告)号：US06697180B1

公开(公告)日：2004-02-24

申请号：US10215868

申请日：2002-08-09

申请人： William L. Wilson ,  Kevin R. Curtis ,  Michael C. Tackitt

发明人： William L. Wilson ,  Kevin R. Curtis ,  Michael C. Tackitt

IPC分类号： G03H112

CPC分类号： G03H1/10 ,  G03H1/26 ,  G03H2001/2675 ,  G11B7/0037 ,  G11B7/0065 ,  G11B7/007 ,  G11B7/128 ,  G11B7/1367 ,  G11B7/1374 ,  G11B7/24044

摘要： Holography in which an array of overlapping holograms is recorded or reconstructed in a recording medium, holograms being produced by interference of a reference beam and a signal beam, in which the reference beam is a phase beam which consists essentially of a multitude of rays of varying angle of incidence and non-uniform phase, in which the process comprises changing the orientation of the phase beam for recording or reconstructing different holograms, wherein phase beam orientation is changed relative to the medium while maintaining the medium stationary in order to enable recording or reconstruction of individual holograms at a given location of the medium.

摘要翻译： 在记录介质中记录或重建重叠全息图阵列的全息术，全息图是通过参考光束和信号光束的干涉产生的，其中参考光束是基本上由许多不同的光线组成的相位光束 入射角和不均匀相位，其中该过程包括改变用于记录或重构不同全息图的相位波束的取向，其中相位波束取向相对于介质改变，同时保持介质静止以便能够进行记录或重建 在介质的给定位置处的各个全息图。

公开(公告)号：US06191875B1

公开(公告)日：2001-02-20

申请号：US09363336

申请日：1999-07-29

申请人： Kevin Richard Curtis ,  Peter B. Littlewood ,  Partha Pratim Mitra ,  William Larry Wilson

发明人： Kevin Richard Curtis ,  Peter B. Littlewood ,  Partha Pratim Mitra ,  William Larry Wilson

IPC分类号： G03H112

CPC分类号： G11C13/042 ,  G03H2001/2675

摘要： An improved process for holography is provided, in which the reference beam used for storage and readout has a correlated phase content. In particular, it was found that reference beams having random phase content limited the attainable storage density and the accuracy of readout of stored holograms due to uncontrolled fluctuations in the correlation selectivity. By contrast, a reference beam having correlated phase content provides accurate shift selectivity, the ability to tailor the reference beam spectrum to minimize crosstalk between neighboring holograms, and mitigation of limitations inherent in the holographic system or holographic medium. Improved storage density and readout accuracy are thereby attained.

摘要翻译： 提供了一种用于全息术的改进方法，其中用于存储和读出的参考光束具有相关的相位内容。 特别地，发现具有随机相位含量的参考光束由于相关选择性的不受控制的波动而限制了可获得的存储密度和存储的全息图的读出精度。 相反，具有相关相位内容的参考光束提供精确的偏移选择性，定制参考光束光谱以最小化相邻全息图之间的串扰的能力以及全息系统或全息介质中固有的限制的减轻。 由此可以获得改善的存储密度和读出精度。

公开(公告)号：US06445470B1

公开(公告)日：2002-09-03

申请号：US09648794

申请日：2000-08-27

申请人： B. Keith Jenkins ,  Armand R. Tanguay, Jr.

发明人： B. Keith Jenkins ,  Armand R. Tanguay, Jr.

IPC分类号： G03H112

CPC分类号： G02B5/32 ,  G03H1/0005 ,  G03H1/265 ,  G03H1/28 ,  G11B7/0065 ,  G11B7/28 ,  G11C13/042 ,  H04Q11/0001

摘要： Novel apparatus for simultaneous spatial modulation of a set of angularly multiplexed individually coherent but mutually incoherent optical beams is disclosed, comprising means for generating a set of two or more individually coherent beams that have at least one optical wavelength in common, pairwise, and are assured to be mutually incoherent, and means for directing the set of individually coherent but mutually incoherent beams to a spatial modulation means, such that a spatially overlapping group of individually coherent but mutually incoherent beams overlap spatially in at least one region of the spatial modulation means and are angularly multiplexed within the region. Such simultaneous spatial modulation is a key feature, for example, in highly multiplexed photonic interconnection, memory, and display systems with maximum optical throughput efficiency and minimum crosstalk, based on parallel incoherent/coherent double angularly multiplexed holographic recording and readout principles. Simultaneous spatial modulation is also of importance for the provision for arbitrarily weighted and independent interconnections in the development of densely interconnected photonic implementations of neural networks, photonic interconnection networks for telecommunications switching and digital computing applications, optical information processors, optical memories, and optical displays. Variants of the apparatus are provided that allow for the incorporation of optically isolated semiconductor laser diode arrays, vertical cavity surface emitting laser arrays that are partially mutually incoherent and partially wavelength division multiplexed, the combination of laser diode and phase modulator arrays to provide for controllable mutual incoherence, both pixelated and non-pixelated spatial light modulators, and both planar and volume holographic or diffractive optical elements employed as spatial light modulation means.

公开(公告)号：US06322931B1

公开(公告)日：2001-11-27

申请号：US09364271

申请日：1999-07-29

申请人： Brian H. Cumpston ,  Joseph W. Perry ,  Seth R. Marder

发明人： Brian H. Cumpston ,  Joseph W. Perry ,  Seth R. Marder

IPC分类号： G03H112

CPC分类号： B82Y10/00 ,  G02F1/3523 ,  G11B7/0045 ,  G11B7/00455 ,  G11B7/0065 ,  G11B7/245

摘要： The present invention comprises an optical data storage system utilizing a host material and molecules that exhibit non-linear absorption dissolved therein. The non-linear absorbing molecules allow for energy in the form of heat to be generated during the optical data storage process. This heat provides for localized alterations to occur in the pre-formatted holographic grating. The non-linear feature of these molecules allow for alterations to occur at specific depths and locations within the storage medium while limiting the secondary effects on other locations within the storage medium. The molecules exhibiting non-linear absorption may be selected from the group of molecules exhibiting two-photon absorption or reverse saturable absorption. The invention also comprises a method for preparing the optical storage medium, an optical data storage device comprising the optical data storage medium and having a format hologram stored within the medium. Additionally, the invention comprises an optical data storage system and method for use thereof wherein the storage system uses the optical data storage medium described above when altering a pre-formatted holographic grating in a localized region by non-linear thermal disruption of the grating. Another embodiment of the present invention comprises an optical data retrieval system embodying the optical data storage device described above and a method for retrieving the format hologram stored on the optical data storage device of the present invention.

摘要翻译： 本发明包括利用主体材料的光学数据存储系统和在其中显示非线性吸收的分子。 非线性吸收分子允许在光学数据存储过程期间产生热的能量。 该热量提供在预格式化全息光栅中发生的局部变化。 这些分子的非线性特征允许在存储介质中的特定深度和位置处发生变化，同时限制对存储介质内的其它位置的二次效应。 显示非线性吸收的分子可以选自呈现双光子吸收或反饱和吸收的分子组。 本发明还包括一种用于制备光学存储介质的方法，包括光学数据存储介质并且具有存储在介质内的格式全息图的光学数据存储设备。 另外，本发明包括光学数据存储系统及其使用方法，其中当通过光栅的非线性热破坏来改变局部区域中的预格式化全息光栅时，存储系统使用上述光学数据存储介质。 本发明的另一实施例包括体现上述光学数据存储装置的光学数据检索系统以及用于检索存储在本发明的光学数据存储装置上的格式全息图的方法。

公开(公告)号：US06246495B1

公开(公告)日：2001-06-12

申请号：US09049136

申请日：1998-03-27

申请人： Ichirou Yamaguchi

发明人： Ichirou Yamaguchi

IPC分类号： G03H112

CPC分类号： G03H1/0443 ,  G03H1/0866 ,  G03H2001/0458

摘要： A phase-shift digital holographic apparatus shifts the phase of a reference wave by a phase shifting means, produces holographic image data by a holographic image pickup means having an image forming surface on which an object wave and the reference wave fall simultaneously, processes a plurality of holographic image data produced by the object wave and a plurality of reference waves of different phases determined by shifting the phase of the reference wave by the phase shifting means by an object wave calculating means to calculate phase data on the phase of the object wave and amplitude data on the amplitude of the object wave, and constitutes object wave data of the phase data on the phase of the object wave and the amplitude data on the amplitude of the object wave calculated by the object wave calculating means by a reproduced image calculating means and subjects the object wave data to a predetermined transformation process to calculate a reproduced image.

摘要翻译： 相移数字全息设备通过相移装置移动参考波的相位，通过具有成像表面的全息图像拾取装置产生全息图像数据，其中对象波和参考波同时落在其上，处理多个 由对象波产生的全息图像数据和通过相移装置移动参考波的相位由对象波计算装置确定的多个不同相位的基准波，以计算对象波的相位的相位数据，以及 并且构成对象波的相位数据的相位数据的对象波数据和由对象波计算装置由再现图像计算装置计算的对象波的振幅的振幅数据的对象波数据 并且对象波数据进行预定的变换处理以计算再现的图像。