Detecting interferential diffraction of a reflected beam from a polymer
liquid crystal recording medium
    5.
    发明授权
    Detecting interferential diffraction of a reflected beam from a polymer liquid crystal recording medium 失效
    检测来自聚合物液晶记录介质的反射光束的干涉衍射

    公开(公告)号:US5339306A

    公开(公告)日:1994-08-16

    申请号:US892657

    申请日:1992-06-03

    Abstract: A memory medium includes a memory layer of a polymer liquid crystal and a reflection layer disposed on a substrate. A record part having a different refractive index from that of a non-record part is formed in the memory layer so that the record part and the non-record part have a difference in optical thickness of the memory layer. In a reproduction step, the memory medium is irradiated with a reproduction beam of coherent light so that the reproduction beam is transmitted through the memory layer, reflected at the reflection layer and re-transmitted through the memory layer, during which the reproduction beam is subjected to interferential diffraction due to the optical thickness difference between the record part and the non-record part to allow readout of the recorded data.

    Abstract translation: 存储介质包括聚合物液晶的存储层和设置在基板上的反射层。 在存储层中形成具有与非记录部分的折射率不同的折射率的记录部分,使得记录部分和非记录部分具有存储层的光学厚度差异。 在再现步骤中,用相干光的再现光束照射存储介质,使得再现光束通过存储层传输,在反射层反射并通过存储层重新传输,在此期间再现光束受到 由于记录部分和非记录部分之间的光学厚度差导致干涉衍射,以允许记录数据的读出。

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