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    • 2. 发明授权
    • Magnetically coupled apparatus for inverting a bias field for
magneto-optic recording and erasing
    • 用于反转用于磁光记录和擦除的偏置场的磁耦合装置
    • US5909411A
    • 1999-06-01
    • US48439
    • 1998-03-26
    • Edward P. FurlaniChristopher C. WilliamsSyamal K. Ghosh
    • Edward P. FurlaniChristopher C. WilliamsSyamal K. Ghosh
    • G11B11/105G11B13/04
    • G11B11/1056
    • A bias-field apparatus for a magneto-optical system having a magneto-optical recording element which includes a conductive substrate and which moves through a magnetic field created by the bias-field device so that information is selectively recorded on or erased from the recording element, the device comprises a support member; a magnet mounted for rotation in the support member such that, when the recording element rotates, the conductive substrate creates a magnetic coupling with the magnet for causing the magnet to rotate; and (c) a ferromagnetic element enclosing a portion of said magnet and having a plurality of spatially separated pole teeth, each of said pole teeth having an operably connected coil disposed thereon that releases said magnet for rotation caused by the conductive substrate when the coil is energized, and prevents rotation when said coil is de-energized for permitting said magnet to be selectively rotated.
    • 一种用于具有磁光记录元件的磁光记录元件的偏磁场设备,该磁光记录元件包括导电衬底并且移动通过由偏置场设备产生的磁场,使得信息被有选择地记录在记录元件上或从记录元件上擦除 ,所述装置包括支撑构件; 安装用于在所述支撑构件中旋转的磁体,使得当所述记录元件旋转时,所述导电衬底与所述磁体产生磁耦合以使所述磁体旋转; 和(c)包围所述磁体的一部分并且具有多个空间分离的极齿的铁磁元件,每个所述极齿具有设置在其上的可操作地连接的线圈,当所述线圈为线圈时,释放所述磁体用于由导电基板引起的旋转 并且当所述线圈断电以防止所述磁体选择性旋转时防止旋转。