公开(公告)号：US5412592A

公开(公告)日：1995-05-02

申请号：US785408

申请日：1991-10-31

申请人： Ashok V. Krishnamoorthy ,  Philippe J. Marchand ,  Gokce Yayla ,  Sadik C. Esener

发明人： Ashok V. Krishnamoorthy ,  Philippe J. Marchand ,  Gokce Yayla ,  Sadik C. Esener

IPC分类号： G06K9/74 ,  G11B7/0065 ,  G11C13/04 ,  G11C15/00

CPC分类号： G11C13/042 ,  G06K9/74 ,  G11B7/0065 ,  G11C15/00

摘要： A high capacity (1 Gbyte), high throughput (1.1 Gbyte/s) motionless-head parallel-readout optical disk, and a detector array integrated on substrate with an Si/PLZT Exclusive-NOR gate array, implement a fast retrieval (25 ms) associative memory/content addressable memory capable of 10.sup.10 bit-operations per second. The disk stores arrayed 1-D holograms, preferably computer-generated from 128.times.128 pixel images by Fourier transform. Reverse transform upon disk readout is by lenses, preferably by a single hybrid refractive/diffractive lens. The reconstituted 2-D image, or optical word, is detected and compared to an electrical data word in an fast integrated optoelectronic circuit. The circuit permits (i) a variably preset "match" detection threshold, and (ii) dynamically variable, sub-image, field size of the search. In a first mode of operation all images (or sub-images) that are sufficiently close to a preset query threshold are retrieved in one disk rotation. In a second mode, Hamming distances for all images (sub-images) are calculated during a first disk rotation, and the identified best match(es) is (are) retrieved on a subsequent rotation. In a third mode a query image can be classified relative to all images upon a disk during one rotation of the disk. In still other modes the associative memory can search for images and sub-images (optical words) of variable size in parallel.

摘要翻译： 高容量（1Gbyte），高吞吐量（1.1Gbyte / s）静止头并行读出光盘以及集成在具有Si / PLZT异或非门阵列的衬底上的检测器阵列，可实现快速检索（25 ms ）关联存储器/内容可寻址存储器，能够每秒进行1010位操作。 磁盘存储阵列的1-D全息图，优选地通过傅里叶变换由128×128像素图像计算机生成。 磁盘读出时的反向变换是透镜，优选通过单个混合折射/衍射透镜。 检测重构的2-D图像或光学字，并将其与快速集成光电子电路中的电数据字进行比较。 电路允许（i）可变地预设的“匹配”检测阈值，以及（ii）搜索的动态变化的子图像的场大小。 在第一操作模式中，在一个盘旋转中检索足够接近于预设查询阈值的所有图像（或子图像）。 在第二模式中，在第一盘旋转期间计算所有图像（子图像）的汉明距离，并且在随后的旋转中检索所识别的最佳匹配。 在第三种模式中，在磁盘旋转一周期间，查询图像可以相对于磁盘上的所有图像分类。 在其他模式中，关联存储器可以并行地搜索可变大小的图像和子图像（光学词）。

公开(公告)号：US5285438A

公开(公告)日：1994-02-08

申请号：US785742

申请日：1991-10-31

申请人： Philippe J. Marchand ,  Ashok V. Krishnamoorthy ,  Pierre Ambs ,  Kristopher Urquhart ,  Sadik C. Esener ,  H. Sing Lee

发明人： Philippe J. Marchand ,  Ashok V. Krishnamoorthy ,  Pierre Ambs ,  Kristopher Urquhart ,  Sadik C. Esener ,  H. Sing Lee

IPC分类号： G03H1/26 ,  G11B7/0065 ,  H04N1/41 ,  H04N7/30 ,  G11B7/00

CPC分类号： H04N19/60 ,  G03H1/26 ,  G11B7/0065 ,  G03H2210/40 ,  G03H2270/22

摘要： A motionless parallel head reads an optical disk having an active surface encoded with an arrayed multiplicity of one-dimensional holograms. Each 1-D hologram is a computer-encoded representation of, typically, one 128 pixel slice of an image. A group, typically 128, 1-D holograms are positionally distributed, and positionally shifted or staggered one to the next, radially along the disk's active surface so as to fit a complete radius. Typically 14,000 groups are circumferentially-displaced around a 51/4" Compact Disk (CD), forming a herringbone pattern. During readout the encoded CD is simultaneously illuminated along the entirety of one of its radius lines within which a group of holographic data blocks are fitted. The illuminated group of holographic data blocks are optically transformed in parallel by one or more lenses, and preferably by a Hybrid refractive/diffractive Optical Lens (HOL), so as to two-dimensionally spatially encode the wavefront of the light beam by which the group of holographic data blocks was illuminated. The 2-D spatially-encoded light beam is detectable by an array of light detectors. When the disk is rotated then sucessive groups of holographic data blocks that are fitted along successive radius lines are successively retrieved, group by group, at a typically 1.1 Gbyte/sec rate. Such an optical memory is useable as the secondary storage of a high performance optoelectronic associative memory system.

摘要翻译： 静止平行头读取具有编码有排列的多维一维全息图的活性表面的光盘。 每个1-D全息图是通常是图像的一个128像素切片的计算机编码表示。 一组通常为128个1-D全息图的位置分布，并且沿着盘的有效表面径向地位移或交错一个到下一个，以便适合完整的半径。 通常，14,000组围绕51/4“压缩盘（CD）周向移位，形成人字形图案。在读出期间，编码的CD同时沿着其一个半径线的整个照明，其中一组全息数据块是 通过一个或多个透镜，优选地通过混合折射/衍射光学透镜（HOL）将全息数据块的照明组并行光学变换，以二维空间编码光束的波前，由此， 全息数据块被照亮，二维空间编码的光束可以通过光检测器阵列检测，当光盘旋转时，依次检索沿连续半径线拟合的全息数据块组， 按照一般的1.1Gbyte /秒的速率，这种光学存储器可用作高性能光电关联备忘录的二次存储 ry系统。