公开(公告)号：US06272095B1

公开(公告)日：2001-08-07

申请号：US08427721

申请日：1995-04-21

申请人： Tsuen-Hsi Liu ,  Demetri Psaltis ,  Fai H. Mok ,  Gan Zhou

发明人： Tsuen-Hsi Liu ,  Demetri Psaltis ,  Fai H. Mok ,  Gan Zhou

IPC分类号： G11B700

CPC分类号： G11B7/1381 ,  G03H2001/0415 ,  G03H2001/0417 ,  G03H2001/266 ,  G11B7/0045 ,  G11B7/005 ,  G11B7/0065 ,  G11B7/007 ,  G11B7/00772 ,  G11B7/12 ,  G11B7/28

摘要： An optical memory for storing and/or reading data on an optical disk. The optical disk incorporates a material in which holographic gratings can be created at plural locations within the disk. An electro-optical head which is capable of creating these holographic gratings at any one of the plural locations is employed. The head is additionally capable of detecting the presence or absence of a holographic grating at any one of these plural locations. The presence of the holographic grating could indicate a first binary state and the absence of the holographic grating indicate a second state. Alternately, the electro-optical head could be used to vary the diffraction efficiency of the holographic gratings during their creation. In that case, the head would also be capable of detecting this variation in efficiency and produce a proportional detection signal. This signal would be used as an indicator of the value of the stored data element. The material of the optical disk is further capable of having multiple holographic gratings created at each one of the plural locations. These multiple holographic gratings are created via a beam of light from the electro-optical head which has a different wavelength or point of focus. In reading these holographic gratings, a beam of light generated by the electro-optical head is sequentially varied in wavelength or point of focus to correspond to the wavelength or point of focus and the sequence of wavelengths or points of focus employed to record each one of the data elements recorded.

摘要翻译： 一种用于在光盘上存储和/或读取数据的光学存储器。 光盘结合了一种材料，其中可以在盘内的多个位置处产生全息光栅。 采用能够在多个位置的任何一个处产生这些全息光栅的电光头。 头部还能够在这些多个位置中的任何一个处检测全息光栅的存在或不存在。 全息光栅的存在可以指示第一二进制状态，并且不存在全息光栅指示第二状态。 或者，电光头可以用于改变全息光栅在其创建期间的衍射效率。 在这种情况下，磁头还能够检测这种效率变化并产生比例检测信号。 该信号将用作存储的数据元素的值的指示符。 光盘的材料还能够具有在多个位置中的每一个处产生的多个全息光栅。 这些多个全息光栅通过具有不同波长或焦点的电光头的光束产生。 在读取这些全息光栅时，由光电头产生的光束在波长或焦点上依次变化，以对应于波长或聚焦点，并且波长或聚焦点用于记录每个 记录数据元素。

公开(公告)号：US06898167B2

公开(公告)日：2005-05-24

申请号：US09924218

申请日：2001-08-07

申请人： Tsuen-Hsi Liu ,  Demetri Psaltis ,  Fai H. Mok ,  Gan Zhou

发明人： Tsuen-Hsi Liu ,  Demetri Psaltis ,  Fai H. Mok ,  Gan Zhou

IPC分类号： G11B7/0045 ,  G11B7/005 ,  G11B7/0065 ,  G11B7/007 ,  G11B7/12 ,  G11B7/135 ,  G11B7/00

CPC分类号： G11B7/1381 ,  G03H2001/0415 ,  G03H2001/0417 ,  G03H2001/266 ,  G11B7/0045 ,  G11B7/005 ,  G11B7/0065 ,  G11B7/007 ,  G11B7/00772 ,  G11B7/12 ,  G11B7/28

摘要： An optical memory for storing and/or reading data on an optical disk. The optical disk incorporates a material in which holographic gratings can be created, and subsequently detected, at plural locations within the disk by an electro-optical head. Creation and detection of holographic gratings with variable diffraction efficiency is possible with the electro-optical head. Multiple holographic gratings can also be created at each one of the plural locations via a beam of light which has a different wavelength or point of focus. These data elements can be read by the electro-optical head using a beam of light sequentially varied in wavelength or point of focus to correspond to the multiple holographic gratings to be recorded.

摘要翻译： 一种用于在光盘上存储和/或读取数据的光学存储器。 光盘包括一种材料，其中可以通过电光头在光盘内的多个位置处产生全息光栅并随后检测全息光栅。 使用电光头可以创建和检测具有可变衍射效率的全息光栅。 也可以通过具有不同波长或焦点的光束在多个位置的每一个处产生多个全息光栅。 这些数据元素可以由电光头使用在波长或焦点上顺序变化的光束对应于待记录的多个全息光栅。

公开(公告)号：US5550779A

公开(公告)日：1996-08-27

申请号：US326783

申请日：1994-10-20

申请人： Geofrrey W. Burr ,  Fai H. Mok ,  Demetri Psaltis

发明人： Geofrrey W. Burr ,  Fai H. Mok ,  Demetri Psaltis

IPC分类号： G11B7/0065 ,  G11C13/04 ,  G11C7/00

CPC分类号： G11B7/0065 ,  G11C13/042

摘要： The invention is embodied in an optical memory having a holographic recording medium capable of storing respective holograms in respective storage spots, the memory including a coherent collimated reference beam and an information-bearing object beam illuminating the recording medium, a segmented optical array including a stack of plural segmented optical sub-arrays, each of the segmented optical sub-arrays including an array of generally parallel optical strips, each optical strip having a strip length extending parallel to the optical strips, respective optical strips of all of the sub-arrays providing an optical path for the reference beam to respective recording spots in the holographic recording medium whenever the reference beam is incident within the strip length, two optical strips in different sub-arrays with optical paths to the same recording spot being separated by at least an out-of-plane multiplexing difference angle subtended by paths of the reference beam to the two optical strips, a reference beam steering apparatus for scanning the reference beam to different locations on the segmented optical array, and a modulator apparatus for modulating the object beam with a succession of input patterns simultaneously with the scanning of the reference beam by the reference beam steering apparatus so as to record a plurality of angle multiplexed and out-of-plane multiplexed holograms in at least one of the recording spots. Each of the sub-arrays corresponds to a different out-of-plane multiplexing angle of the reference beam.

摘要翻译： 本发明体现在具有全息记录介质的光学存储器中，该全息记录介质能够将相应的全息图存储在相应的存储点中，存储器包括相干准直参考光束和照射记录介质的信息承载物体光束，包括堆叠的分段光学阵列 多个分段光学子阵列中的每个分段光学子阵列包括大致平行的光学条带的阵列，每个光学条具有平行于光学条带延伸的条带长度，所有子阵列的相应光学条带提供 每当参考光束入射到条带长度内时，参考光束到全息记录介质中的相应记录点的光路，在具有到相同记录光点的光路的不同子阵列中的两个光学条带被至少一个外部 由参考光束的路径对向到两个选择的面间复用差分角度 用于将参考光束扫描到分段光学阵列上的不同位置的参考光束转向装置，以及用于通过参考光束转向与参考光束的扫描同时用一系列输入图案调制物体光束的调制器装置 装置，以便在至少一个记录点中记录多个角度多路复用和面外复用全息图。 每个子阵列对应于参考光束的不同的平面外多路复用角。

公开(公告)号：US5436867A

公开(公告)日：1995-07-25

申请号：US27991

申请日：1993-03-08

申请人： Fai H. Mok

发明人： Fai H. Mok

IPC分类号： G11C13/04

CPC分类号： G11C13/042

摘要： Disclosed is a spatial multiplexer for use with a holographic storage medium, and an information storage system employing the spatial multiplexer. The spatial multiplexer directs a reference beam of optical radiation onto the storage medium, the storage medium having (n) rows and (m) columns of storage locations. The spatial multiplexer includes an array of (n times m) discrete reflector elements each having a linear shape. The discrete reflector elements are disposed in a parallel arrangement with one another upon a substrate, and each has a different angular orientation with respect to the storage medium. A deflection of the reference beam by an angle multiplexer changes the angle of incidence of the reference beam on the storage medium, which provides multiple angles required for angle multiplexing a plurality of superimposed holograms within a single storage location. A deflection of the reference beam by the spatial multiplexer specifies one of the plurality of reflectors, and thus selects one of the storage locations upon which the angle multiplexed reference beam is incident.

摘要翻译： 公开了一种用于全息存储介质的空间多路复用器，以及采用空间复用器的信息存储系统。 空间多路复用器将光辐射的参考光束引导到存储介质上，存储介质具有（n）列和（m）列的存储位置。 空间多路复用器包括每个具有线性形状的（n×m）个离散反射器元件的阵列。 离散的反射器元件在基板上彼此平行地布置，并且每个具有相对于存储介质的不同的角度取向。 参考光束通过角度复用器的偏转改变了参考光束在存储介质上的入射角，这提供了在单个存储位置内角度复用多个叠加的全息图所需的多个角度。 由空间多路复用器指定参考光束的偏转指定多个反射器中的一个，从而选择角度多路复用参考光束入射的存储位置之一。