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    • 83. 发明授权
    • Method for regenerating information from a magneto-optical information
recording medium
    • 从磁光信息记录介质再生信息的方法
    • US4932012A
    • 1990-06-05
    • US147075
    • 1988-01-20
    • Tadashi Kobayashi
    • Tadashi Kobayashi
    • G11B11/10G11B11/105
    • G11B11/10591G11B11/10536
    • There is disclosed a magnetooptical recording medium provided with at least a recording layer and a reading layer both composed of magnetic layers showing vertical magnetic anisotropy, in which the recording layer has a higher coercive force and a lower Curie temperature than those of the reading layer at room temperature, wherein the thickness of the recording layer is 1/10 to 1/1000 of the diameter of the magnetic domain formed in the recording layer by information recording, and the reading layer is so positioned with respect to the recording layer that a floating magnetic field emanating from the magnetic domain in the recording layer shows positive and negative peaks in the reading layer in the vicinity of the boundary of the magnetic domain. Secure regeneration of information with a high S/N ratio is possible from such recording medium by irradiating the reading layer with light while applying a magnetic field of which magnitude is larger than the coercive force of the reading layer, smaller than that of the recording layer and smaller than the peak value of the floating magnetic field emanating from the recording layer, and detecting the regenerating light modulated in polarization according to the direction of magnetization of the reading layer.
    • 公开了一种具有至少记录层和读取层的磁光记录介质,该层由显示垂直磁各向异性的磁性层组成,其中记录层具有较高的矫顽力和比读取层低的居里温度 室温,其中记录层的厚度是通过信息记录形成在记录层中的磁畴的直径的1/10至1/1000,并且读取层相对于记录层被定位成浮动 在记录层中从磁畴发出的磁场在磁畴边界附近的读取层中显示正和负峰。 可以从这种记录介质通过用光照射读取层来施加具有高S / N比的信息的安全再生,同时施加大于读取层的矫顽力的磁场的磁场小于记录层的磁场 并且小于从记录层发出的浮动磁场的峰值,并且根据读取层的磁化方向检测以极化方式调制的再生光。
    • 89. 发明授权
    • Cassette case
    • 盒式盒
    • US4054206A
    • 1977-10-18
    • US766202
    • 1977-02-07
    • Tadashi KobayashiKiichiro Toyoshima
    • Tadashi KobayashiKiichiro Toyoshima
    • B65D85/575G11B23/023B65D85/67
    • G11B23/0233
    • A storage case for storing a tape cassette that includes a tape reel hub having a cylindrical wall defining a cylindrical recess in the hub with a bottom wall extending across the recess and having a plurality of drive holes formed therein. The case includes an enclosure for receiving and enclosing the tape cassette and a hub engaging member movably mounted in the case for reciprocal movement between retracted and extended positions with respect to one wall of the case. The hub engaging member is located to be received in the reel hub recess when the tape cassette is inserted in the case, and it includes at least one locking button for engaging one of the drive holes of the reel. The hub engaging member is biased towards its extended position to engage the locking button in one of the drive holes of the reel hub when there is alignment therebetween. And, the hub engaging member is held against rotation in the case so that when its locking button is engaged in the drive hole of the reel hub, the hub is locked against rotation.
    • 一种用于存储盒式磁带的存储盒,该盒式磁带包括具有圆柱形壁的磁带盘毂,所述磁带盘毂在毂中限定一圆柱形凹槽,底壁延伸穿过该凹槽,并且在其中形成有多个驱动孔。 壳体包括用于接收和封闭带盒的外壳和可移动地安装在壳体中的轮毂接合构件,用于相对于壳体的一个壁在缩回位置和伸出位置之间往复运动。 当盒式磁带插入壳体时,毂接合构件被定位成容纳在卷盘毂凹部中,并且其包括用于接合卷轴的一个驱动孔的至少一个锁定按钮。 当它们之间存在对准时,毂接合构件被朝向其延伸位置偏置以接合卷轴毂的一个驱动孔中的锁定按钮。 并且,毂壳接合构件在壳体中被保持为不旋转,使得当其锁定按钮接合在卷轴毂的驱动孔中时,毂被锁定以防旋转。