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    Optical information recording medium and information recording and reproducing method therefor
    7.
    发明授权
    Optical information recording medium and information recording and reproducing method therefor 失效
    光信息记录介质及其信息记录和再现方法

    公开(公告)号：US5249175A

    公开(公告)日：1993-09-28

    申请号：US865640

    申请日：1992-04-09

    申请人： Nobuo Akahira ,  Kenichi Nishiuchi ,  Ken'ichi Nagata

    发明人： Nobuo Akahira ,  Kenichi Nishiuchi ,  Ken'ichi Nagata

    IPC分类号： G11B7/0045 ,  G11B7/005 ,  G11B7/24

    CPC分类号： G11B7/0051 ,  G11B7/00455 ,  G11B7/24

    摘要： An optical information recording medium includes a thin film material formed on a substrate; the optical constant of this thin film material is changed upon application of an incident light beam, such that the optical phase of reflected or transmitted light is shifted thereby reproducing a signal by detecting the change in either the reflected or transmitted light due to this optical phase change. It is also possible perform signal reproduction equivalent to conventional concave-convex pit methodology, but without being accompanied by resulting media deformation, thereby improving the recording density. It is easy to interchange with optical recording media of the write-once and read-only types, and, furthermore, it is possible to erase and rewrite at will.

    摘要翻译： 光学信息记录介质包括形成在基板上的薄膜材料; 这种薄膜材料的光学常数在施加入射光束时改变，使得反射或透射光的光学相位偏移，从而通过检测由于该光学相位的反射光或透射光的变化而再现信号 更改。 也可以执行等同于常规凹凸坑方法的信号再现，但不伴随所得的介质变形，从而提高记录密度。 可以容易地与一次写入和只读类型的光学记录介质进行交换，此外，可以随意擦除和重写。