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    Information reading apparatus and information recording medium
    4.
    发明授权
    Information reading apparatus and information recording medium 失效
    信息读取装置和信息记录介质

    公开(公告)号：US06729541B1

    公开(公告)日：2004-05-04

    申请号：US09340718

    申请日：1999-06-29

    申请人： Yoshiaki Kurokawa ,  Toshifumi Ohkubo ,  Manabu Yamamoto ,  Takaya Tanabe ,  Shogo Yagi

    发明人： Yoshiaki Kurokawa ,  Toshifumi Ohkubo ,  Manabu Yamamoto ,  Takaya Tanabe ,  Shogo Yagi

    IPC分类号： G06K714

    CPC分类号： G11B7/1374 ,  G03H1/0408 ,  G03H1/26 ,  G03H2001/2226 ,  G03H2001/2615 ,  G11B7/0065 ,  G11B7/125 ,  G11B7/1263 ,  G11B7/131 ,  G11B7/24012 ,  G11B7/24038 ,  G11B7/24044 ,  G11B2007/0013 ,  G11C13/042

    摘要： An information reading apparatus can detect the coupling state of the input light to a waveguide of a laminated recording medium in a simple manner, so as to enable to focus the input light on a target recording layer to access the information recorded in the target recording layer quickly. The apparatus is compact and is economical to produce. The apparatus has a light source for injecting a light on an input edge of a lamination recording section, assembled into the recording medium containing a lamination of recording layers. Each recording layer has data represented by scattering centers which diffract an input light generated by a converging lens. An input light directing device directs the light source and the converging lens as a unit to focus the input light on a desired location. An image recording device records an informational image generated by guided waves produced within a laminated waveguide. An optical power detector detects output light emitted from an output edge of a specific recording layer as well as scattered light generated from recording layers other than the specific recording layer. An optical power discrimination circuit determines whether an optical power detected by the optical power detector is associated with the output light or the scattered light. Data recorded in any specific recording layer can be accessed quickly and simply by focusing input light on a core layer of a multi-layered hologram recording data storage medium. Because the absolute positional information stored in the storage medium is minimized, data storage capacity of the storage medium is almost unaffected while making the apparatus compact and low cost.

    摘要翻译： 信息读取装置可以以简单的方式检测输入光到层叠记录介质的波导的耦合状态，以便能够将输入光聚焦在目标记录层上以访问记录在目标记录层中的信息 很快。 该设备紧凑，生产经济。 该装置具有用于将光注入层压记录部的输入边缘的光源，组装到包含记录层的叠层的记录介质中。 每个记录层具有由散射中心表示的数据，衍射由会聚透镜产生的输入光。 输入光引导装置引导光源和会聚透镜作为一个单元，以将输入光聚焦在期望的位置上。 图像记录装置记录由层叠波导内产生的导波生成的信息图像。 光功率检测器检测从特定记录层的输出边缘发射的输出光以及从特定记录层以外的记录层产生的散射光。 光功率鉴别电路确定由光功率检测器检测的光功率是否与输出光或散射光相关联。 记录在任何特定记录层中的数据可以通过将输入光聚焦在多层全息图记录数据存储介质的核心层上而被快速简单地访问。 由于存储介质中存储的绝对位置信息最小化，所以存储介质的数据存储容量几乎不受影响，同时使设备紧凑且成本低。

    Optical data readout with two beams on three tracks
    5.
    发明授权
    Optical data readout with two beams on three tracks 失效
    在三个轨道上用两个光束进行光学数据读出

    公开(公告)号：US5619487A

    公开(公告)日：1997-04-08

    申请号：US511242

    申请日：1995-08-04

    申请人： Takaya Tanabe ,  Manabu Yamamoto ,  Kikuji Katoh ,  Hisanobu Dobashi

    发明人： Takaya Tanabe ,  Manabu Yamamoto ,  Kikuji Katoh ,  Hisanobu Dobashi

    IPC分类号： G11B7/14 ,  G11B7/00

    CPC分类号： G11B7/14

    摘要： The present invention provides a data readout apparatus and method using optical beams by which high data-recording density for optical recording media and high transfer rate for regenerated data can be realized. The data readout method of the present invention comprises the steps of: making a first optical beam incident on an optical recording medium in a manner such that in three successive tracks n-1, n, and n+1, n being an integer of two or more, on the recording medium, the center of the beam spot of the first optical beam lies, in a transverse direction of the tracks, between the boundary point of tracks n-1 and n and the center of track n-1; making a second optical beam incident on the optical recording medium in a manner such that the center of the beam spot of the second optical beam lies, in the transverse direction of the tracks, between the boundary point of tracks n+1 and n and the center of track n+1; detecting reflected beams of the first and second optical beams from the optical recording medium; and regenerating data recorded on the three tracks in accordance with levels of the detected reflected beams. According to this, data sequences recorded on three successive tracks can be regenerated simultaneously by using two optical beams; thus, even if the track pitch is narrowed, it is possible to detect signals without the influence of crosstalk, and the data transfer rate can be increased. The apparatus for implementing this method allows simpler circuit arrangement.

    摘要翻译： 本发明提供了一种使用光束的数据读出装置和方法，通过该光束可以实现用于光学记录介质的高数据记录密度和用于再生数据的高传送速率。 本发明的数据读出方法包括以下步骤：使第一光束入射到光记录介质上，使得在三个连续的磁道n-1，n和n + 1中，n是整数2 或更多，在记录介质上，第一光束的光束点的中心在轨道的横向方向上位于轨道n-1和n的边界点与轨道n-1的中心之间; 以使得第二光束的光点的中心在轨道的横向方向上位于轨道n + 1和n的边界点之间的方式使入射在光学记录介质上的第二光束和 轨道中心n + 1; 检测来自光记录介质的第一和第二光束的反射光束; 以及根据检测到的反射光束的电平再现记录在三个磁道上的数据。 据此，可以通过使用两个光束同时再现记录在三个连续轨道上的数据序列; 因此，即使轨道间距变窄，也可以在不受串扰的影响的情况下检测信号，并且可以提高数据传送速率。 用于实现该方法的装置允许更简单的电路布置。

    Optical waveguide, holographic medium, holographic storage and retrieval method and system
    7.
    发明授权
    Optical waveguide, holographic medium, holographic storage and retrieval method and system 有权
    光波导，全息介质，全息存储和检索方法及系统

    公开(公告)号：US07046892B2

    公开(公告)日：2006-05-16

    申请号：US10184686

    申请日：2002-06-19

    申请人： Hiroshi Yoshikawa ,  Yasuko Andoh ,  Keiichiro Itoh ,  Masakatsu Senda ,  Yoshiaki Kurokawa ,  Takaya Tanabe

    发明人： Hiroshi Yoshikawa ,  Yasuko Andoh ,  Keiichiro Itoh ,  Masakatsu Senda ,  Yoshiaki Kurokawa ,  Takaya Tanabe

    IPC分类号： G02B6/10

    CPC分类号： G03H1/26 ,  G02B2006/12107 ,  G03H1/0408 ,  G03H1/265 ,  G03H2001/0264 ,  G03H2222/47 ,  G11B7/0065

    摘要： A holographic medium is formed of an optical waveguide including at least one core layer positioned between at least one portion of a material having a lower refractive index, a diffraction grating layer formed at a boundary between the core layer and the material of lower refractive index or in the core layer, and a storage layer outside the optical waveguide. Upon storing information in the storage layer a reference beam and an object are input into the optical waveguide and in retrieving stored information the reference beam is emitted to an end face of the core layer and transmitted through the core layer to be transformed into a diffracted beam in a diffraction grating layer that is emitted outside the core layer and transmitted through the storage layer, where the object beam is retrieved as a retrieved beam.

    摘要翻译： 全息介质由光波导形成，该光波导包括位于至少一部分具有较低折射率的材料之间的至少一个芯层，在芯层和低折射率材料之间的边界处形成的衍射光栅层，或 在芯层中，以及在光波导外的存储层。 在存储层中存储信息时，将参考光束和物体输入到光波导中，并且在检索存储的信息中，将参考光束发射到核心层的端面并透射穿过芯层以被变换为衍射光束 在衍射光栅层中，其发射在核心层外部并通过存储层传输，其中物体光束作为检索的光束被检索。

    Laminated holographic medium, recording apparatus/method, reproduction apparatus/method for the same and design method of laminated hologram medium
    8.
    发明申请
    Laminated holographic medium, recording apparatus/method, reproduction apparatus/method for the same and design method of laminated hologram medium 有权
    叠层全息介质，记录装置/方法，再现装置/方法以及叠层全息图介质的设计方法

    公开(公告)号：US20070146843A1

    公开(公告)日：2007-06-28

    申请号：US10579115

    申请日：2004-12-09

    申请人： Tokinobu Mitasaki ,  Masakatsu Senda ,  Masahiro Ueno ,  Takaya Tanabe

    发明人： Tokinobu Mitasaki ,  Masakatsu Senda ,  Masahiro Ueno ,  Takaya Tanabe

    IPC分类号： G03H1/26

    CPC分类号： G11B7/24 ,  G03H1/0408 ,  G03H1/26 ,  G03H2001/2615 ,  G11B7/0065 ,  G11B7/24038 ,  G11B7/24044

    摘要： A medium 1, that is a laminated holographic medium of the present invention is composed of two or more core layers 2; 3 or more cladding layers 3 set so as to bind the core layers 2; one or more diffraction grating layers 4 storing information data and set at a boundary between a portion of the core layers 2 and the cladding layers 3 binding the core layers 2 or set inside the core layers 2; and one or more recording layers 42 storing information data as forms or a refractive index distribution and set at a boundary between a portion of the core layers 2 and the cladding layers 3 binding the core layers 2 or inside the core layers 2 through or without a gap layer.

    摘要翻译： 作为本发明的叠层全息介质的介质1由两层以上的芯层2构成， 设置3个以上的包覆层3以结合芯层2; 一个或多个衍射光栅层4，其存储信息数据并设置在芯层2的一部分与包覆层3之间的边界处，或者包覆芯层2或者设置在芯层2内; 以及将信息数据作为形式或折射率分布存储的一个或多个记录层42，其设置在芯层2的一部分与包覆层3之间的边界处，通过或不具有结合芯层2或芯层2内 间隙层。

    Information coding apparatus, information decoding apparatus, and method and program for the same
    9.
    发明申请
    Information coding apparatus, information decoding apparatus, and method and program for the same 有权
    信息编码装置，信息解码装置及其方法和程序

    公开(公告)号：US20050226515A1

    公开(公告)日：2005-10-13

    申请号：US10517625

    申请日：2004-04-08

    申请人： Masahiro Endo ,  Yoshiaki Kurokawa ,  Shogo Yagi ,  Takaya Tanabe

    发明人： Masahiro Endo ,  Yoshiaki Kurokawa ,  Shogo Yagi ,  Takaya Tanabe

    IPC分类号： G06K19/06 ,  G11B7/0065 ,  G06K9/36

    CPC分类号： G06K19/06037

    摘要： An information coding apparatus, an information decoding apparatus, and a method and a program therefor are provided, which can represent a large amount of information with a small number of pixels. Information bits which are inputted are coded as a block of a two-dimensional image made up from m (where m is a natural number)×n (where n is a natural number) pixels. Specifically, pixels which represent the information bits are arranged in a code area, which is an area of (m−o)×(n−p) pixels within a code block of m×n pixels (where o and p are natural numbers which satisfy 0

    摘要翻译： 提供一种信息编码装置，信息解码装置及其方法和程序，其可以表示具有少量像素的大量信息。 输入的信息位被编码为由m（其中m是自然数）xn（其中n是自然数）像素构成的二维图像的块。 具体地，表示信息比特的像素被排列在码区域中，该区域是m×n像素的码块内的（mo）x（np）个像素的区域（其中o和p是满足0

    Laminated holographic medium, recording apparatus/method, reproduction apparatus/method for the same and design method of laminated hologram medium
    10.
    发明授权
    Laminated holographic medium, recording apparatus/method, reproduction apparatus/method for the same and design method of laminated hologram medium 有权
    叠层全息介质，记录装置/方法，再现装置/方法以及叠层全息图介质的设计方法

    公开(公告)号：US08018636B2

    公开(公告)日：2011-09-13

    申请号：US10579115

    申请日：2004-12-09

    申请人： Tokinobu Mitasaki ,  Masakatsu Senda ,  Masahiro Ueno ,  Takaya Tanabe

    发明人： Tokinobu Mitasaki ,  Masakatsu Senda ,  Masahiro Ueno ,  Takaya Tanabe

    IPC分类号： G03H1/00 ,  G03H1/04

    CPC分类号： G11B7/24 ,  G03H1/0408 ,  G03H1/26 ,  G03H2001/2615 ,  G11B7/0065 ,  G11B7/24038 ,  G11B7/24044

    摘要： A medium 1, that is a laminated holographic medium of the present invention is composed of two or more core layers 2; 3 or more cladding layers 3 set so as to bind the core layers 2; one or more diffraction grating layers 4 storing information data and set at a boundary between a portion of the core layers 2 and the cladding layers 3 binding the core layers 2 or set inside the core layers 2; and one or more recording layers 42 storing information data as forms or a refractive index distribution and set at a boundary between a portion of the core layers 2 and the cladding layers 3 binding the core layers 2 or inside the core layers 2 through or without a gap layer.

    摘要翻译： 作为本发明的叠层全息介质的介质1由两层以上的芯层2构成， 设置3个以上的包覆层3以结合芯层2; 一个或多个衍射光栅层4，其存储信息数据并设置在芯层2的一部分与包覆层3之间的边界处，或者包覆芯层2或者设置在芯层2内; 以及将信息数据作为形式或折射率分布存储的一个或多个记录层42，其设置在芯层2的一部分与包覆层3之间的边界处，通过或不具有结合芯层2或芯层2内 间隙层。