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    Method for constructing and reconstructing hologram
    4.
    发明公开
    Method for constructing and reconstructing hologram 失效
    构造和重构霍洛姆的方法

    公开(公告)号：EP0140594A3

    公开(公告)日：1986-05-14

    申请号：EP84306733

    申请日：1984-10-03

    申请人： FUJITSU LIMITED

    发明人： Ikeda, Hiroyuki ,  Yamagishi, Fumio ,  Kato, Masayuki ,  Kitagawa, Shunji ,  Inagaki, Takefumi

    IPC分类号： G03H01/00 ,  G02B05/32

    CPC分类号： G02B5/32 ,  G03H1/00 ,  G03H1/0005 ,  G03H2001/0413 ,  G03H2001/186 ,  G03H2001/2234

    摘要： A method for constructing and reconstructing a hologram. The hologram is constructed by irriadiating two construction beams (102,103) having different incidence angles (β', a') onto a hologram record medium (101) and forming interference fringe patterns therein by the two construction beams. The hologram is reconstructed by irradiating a reconstruction beam (106) onto the interference fringe patterns so as to diffract the reconstruction beam in accordance with the interference fringe patterns. At least one of the two construction beams irradiates the hologram record medium through at least one optical deviation element (119). The incidence angle, relative to the interference fringe patterns, of the reconstruction beam is different from that of each construction beam and arranged to be nearly a Bragg angle at any point of the hologram.

    Method for constructing and reconstructing hologram
    6.
    发明公开
    Method for constructing and reconstructing hologram 失效
    一种用于记录和全息图再现方法。

    公开(公告)号：EP0140594A2

    公开(公告)日：1985-05-08

    申请号：EP84306733.1

    申请日：1984-10-03

    申请人： FUJITSU LIMITED

    发明人： Ikeda, Hiroyuki ,  Yamagishi, Fumio ,  Kato, Masayuki ,  Kitagawa, Shunji ,  Inagaki, Takefumi

    IPC分类号： G03H1/00 ,  G02B5/32

    CPC分类号： G02B5/32 ,  G03H1/00 ,  G03H1/0005 ,  G03H2001/0413 ,  G03H2001/186 ,  G03H2001/2234

    摘要： A method for constructing and reconstructing a hologram. The hologram is constructed by irriadiating two construction beams (102,103) having different incidence angles (β', a') onto a hologram record medium (101) and forming interference fringe patterns therein by the two construction beams. The hologram is reconstructed by irradiating a reconstruction beam (106) onto the interference fringe patterns so as to diffract the reconstruction beam in accordance with the interference fringe patterns. At least one of the two construction beams irradiates the hologram record medium through at least one optical deviation element (119). The incidence angle, relative to the interference fringe patterns, of the reconstruction beam is different from that of each construction beam and arranged to be nearly a Bragg angle at any point of the hologram.

    An information readout device
    7.
    发明公开
    An information readout device 失效
    信息读出装置

    公开(公告)号：EP0032794A1

    公开(公告)日：1981-07-29

    申请号：EP81300086.6

    申请日：1981-01-09

    申请人： FUJITSU LIMITED

    发明人： Ikeda, Hiroyuki ,  Matsumoto, Seikichi ,  Kitagawa, Shunji ,  Inagaki, Takefumi ,  Sebata, Ichiro

    IPC分类号： G06K7/10

    CPC分类号： G06K7/10871 ,  G06K7/10881

    摘要： A hand-held beam scanning information readout device for reading information, for example presented in a bar-code format, has a housing (4) within which are accommodated a beam generator (11), an optical scanner (17) and an optical detector (120).
    Generator (11) generates for example a coherent laser beam (14) which passes to scanner (17) for example provided by a rotating hologram to provide a scanning output beam (110) which scans in a circle (113) for example. Light (116) of the scanning output beam (110) reflected from information to be read, for example bar-code symbol BCS, passes via hologram (17) to a convergence lens (118), for example a Fresnel lens, to detector (120).
    Other scanning patterns are also proposed.

    摘要翻译： 用于读取信息（例如以条形码格式呈现）的手持式射束扫描信息读取装置具有壳体（4），壳体（4）内容纳有光束发生器（11），光学扫描器（17）和光学检测器 （120）。 发生器（11）例如产生通过扫描器（17）的相干激光束（14），例如由旋转全息图提供，以提供例如在圆圈（113）中扫描的扫描输出光束（110）。 从要被读取的信息（例如条形码符号BCS）反射的扫描输出光束（110）的光（116）经由全息图（17）经过会聚透镜（118），例如菲涅耳透镜到达检测器 120）。 其他扫描模式也被提出。