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    Magneto-optic method and system for recording and retrieving high-density digital data
    2.
    发明公开
    Magneto-optic method and system for recording and retrieving high-density digital data 失效
    磁光方法和设备用于记录和再现高密度的数字数据。

    公开(公告)号：EP0437170A1

    公开(公告)日：1991-07-17

    申请号：EP90810017.5

    申请日：1990-01-09

    申请人： International Business Machines Corporation

    发明人： Allenspach, Rolf, Dr. ,  Bischof, Andreas

    IPC分类号： G11B11/10 ,  G11B11/12

    CPC分类号： G11B11/10543 ,  G11B11/10504 ,  G11B11/10515 ,  G11B11/10536 ,  G11B11/10584

    摘要： This magneto-optic method and apparatus for recording and retrieving high-density digital data employ the selective heating, beyond the Curie or compensation temperature T c of the record material, at individual storage locations of a magnetically ordered record layer (9) in the presence of an external magnetic field for recording information by rotating the direction of polarization at the affected record locations, and the selective detection of the state of rotation of the polarization direction at information storage locations in a recording medium (7) by way of analyzing the state of rotation of the light transmitted through said record material. The writing and retrieval of information are performed by means of a sharply pointed tip (5) placed at an essentially constant distance above the recording medium (7), the sharpness of the apex (6) of said tip (5) determining the resolution and, hence, the achievable storage density.
    The heating of the storage locations in the record layer (9) is accomplished by means of a laser beam (1, 2) directed onto the recording medium (7) through said slidably arranged tip (5). For detecting the state of rotation of the polarization direction at the individual storage locations, a laser beam (11) travelling inside a wave guide (12) arranged in juxtaposition with said recording medium (7), is coupled into said record layer (9). The light transmitted through the record layer (9) is analyzed by said tip (5) followed by a beam-splitting prism (3) which provides the s- and p-polarized components of the light.

    摘要翻译： 这个用于记录和检索高密度数字数据磁光方法和装置使用选择性加热，超出了记录材料的居里或补偿温度Tc，在存在一个磁有序记录层（9）的各个存储位置 到外部磁场通过在受影响的记录的位置旋转偏振方向记录信息，并通过分析的状态的方式，选择性地检测在一个记录介质（7）的信息的存储位置的偏振方向的旋转状态的 通过所述记录材料中的光反mitted的旋转。 的写入和检索信息执行通过的尖锐尖端装置（5）在以基本恒定的距离的记录介质上方放置（7），所述顶点的锐度（6）所述尖端（5）确定的采矿分辨率的和 ，因此，可达到的存储密度。 在记录层（9）的存储位置的加热是通过激光束来完成（1,2）引导到所述记录介质（7）通过所述可滑动地布置尖端（5）。 对于在各个存储位置检测的偏振方向的旋转的状态下，在并置布置成与所述记录介质的波导（12）的内部行进的激光束（11）（7）被耦合到所述记录层（9） ， （5）通过一个分束棱镜其次通过记录层（9）mitted的光反式通过所述尖端分析（3），其提供的光的s-和p-偏振分量。