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1. 发明授权

US5357493A Magneto-optic memory device for overwriting information on magneto-optic recording medium by using a pair of light spots without using an external magnetic field 失效
标题翻译：磁光存储器件，用于通过在不使用外部磁场的情况下使用一对光点覆盖磁光记录介质上的信息
公开(公告)号：US5357493A
公开(公告)日：1994-10-18
申请号：US933771
申请日：1992-08-24
申请人： Yukinori Okazaki , Mieko Kobukata
发明人： Yukinori Okazaki , Mieko Kobukata
IPC分类号： G11B11/105 , G11B13/04
CPC分类号： G11B11/10519 , G11B11/10536
摘要： In a magneto-optic memory device for recording information on a magneto-optic recording medium having a magneto-optic recording film irradiated by a first small diameter light spot and a second larger diameter light spot which is substantially concentric with the first light spot, the temperature of a portion of the recording film around a recording position is changed by the irradiation of the second light spot in accordance with an information signal to be recorded, between a temperature, which is lower than a compensation temperature of the recording film and produces spontaneous magnetization of the recording film having intensity necessary for recording information, and a temperature which is higher than the compensation temperature of the recording film and produces spontaneous magnetization of the recording film having intensity necessary for recording information, and the intensity of the first light spot is increased to raise the temperature of the recording position of the recording film so as to reach near the Curie temperature of the recording film, thereby erasing old information and recording new information at the same time.
摘要翻译：在用于在具有由第一小直径光点照射的磁光记录膜和与第一光斑基本同心的第二较大直径光点的磁光记录介质上记录信息的磁光存储器件中，记录膜周围记录位置的一部分的温度根据要记录的信息信号在第二光点的照射之间在低于记录膜的补偿温度的温度之间改变，并产生自发的具有记录信息所需的强度的记录膜的磁化和高于记录膜的补偿温度的温度，并且产生具有记录信息所需的强度的记录膜的自发磁化，并且第一光点的强度是增加以提高记录位置的温度以便达到接近记录膜的居里温度，从而同时擦除旧信息并记录新信息。

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