知搜-全球专利检索

  1. 登录
  2. 注册

搜索结果

5 条记录 (耗时 0.016 秒)

    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。