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19 条记录 (耗时 0.022 秒)

    Magneto optical recording medium and method
    1.
    发明公开
    Magneto optical recording medium and method 失效
    一种磁光记录介质和方法

    公开(公告)号：EP0818783A3

    公开(公告)日：1999-04-14

    申请号：EP97202863.3

    申请日：1992-07-14

    申请人： CANON KABUSHIKI KAISHA

    发明人： Kobayashi, Tadashi ,  Hasegawa, Koyo ,  Hongu, Kazuoki ,  Yamamoto, Masakuni

    IPC分类号： G11B11/10

    CPC分类号： G11B11/10508 ,  G11B11/10515 ,  G11B11/10586

    摘要： A magneto-optical recording method employs a magneto-optical recording medium having a first magnetic layer which exhibits low coercive force at room temperature and high Curie temperature and a second magnetic layer which is exchange-coupled to the first magnetic layer and which exhibits a higher coercive force and a lower Curie temperature as compared with those of the first magnetic layer. A magnetic field modulated in accordance with information to be recorded is applied to the magneto-optical recording medium while irradiating it with a light beam of a constant intensity so as to record the information. The recorded information is simultaneously confirmed by using a reflected light of this light beam.

    Magnetooptical recording medium allowing overwriting with two or more magnetic layers and recording method utilizing the same
    2.
    发明公开
    Magnetooptical recording medium allowing overwriting with two or more magnetic layers and recording method utilizing the same 失效
    允许用两个或更多磁性层重写的磁光记录介质和利用其的记录方法

    公开(公告)号：EP0838814A3

    公开(公告)日：1998-06-17

    申请号：EP98200006.9

    申请日：1987-07-08

    申请人： CANON KABUSHIKI KAISHA

    发明人： Osato, Yoichi ,  Kawade, Hisaaki ,  Fujii, Eiichi ,  Kasama, Nobuhiro ,  Kobayashi, Tadashi

    IPC分类号： G11B11/10

    CPC分类号： G11B11/10506 ,  G11B11/10519 ,  G11B11/10586 ,  G11B11/10591 ,  Y10T428/26

    摘要： This apparatus and system comprise a medium (11) provided with a first magnetic layer (2) and at least a second magnetic layer (3) having a higher Curie point temperature (Tc) and a lower coercive force (H L ) than those of said first magnetic layer and being exchange coupled with said first magnetic layer satisfying a relation: H H > H L > σ w 2M s h wherein H H is the coercive force of the first magnetic layer; H L is the coercive force of the second magnetic layer; M s is the saturation magnetization of the second magnetic layer; h is the thickness thereof; and σ w is the magnetic wall energy between the first and second magnetic layers, means (6,14,22) for irradiating the medium (11) with a modulated light beam and means (24) for applying magnetic fields to the medium.

    摘要翻译： 该设备和系统包括具有第一磁性层（2）和至少第二磁性层（3）的介质（11），所述第二磁性层具有比所述第一磁性层（2）更高的居里点温度（Tc）和更低的矫顽力（HL） 第一磁性层并且与所述第一磁性层交换耦合，所述第一磁性层满足以下关系：HH> HL>σw2Msh，其中HH是所述第一磁性层的矫顽力; HL是第二磁层的矫顽力; Ms是第二磁性层的饱和磁化强度; h是其厚度; σw是第一和第二磁性层之间的磁壁能量，用调制光束照射介质（11）的装置（6,14,22）和用于向介质施加磁场的装置（24）。

    Magneto optical recording medium and method
    3.
    发明公开
    Magneto optical recording medium and method 失效
    磁选Aufzeichnungsmedium und -verfahren

    公开(公告)号：EP0818783A2

    公开(公告)日：1998-01-14

    申请号：EP97202863.3

    申请日：1992-07-14

    申请人： CANON KABUSHIKI KAISHA

    发明人： Kobayashi, Tadashi ,  Hasegawa, Koyo ,  Hongu, Kazuoki ,  Yamamoto, Masakuni

    IPC分类号： G11B11/10

    CPC分类号： G11B11/10508 ,  G11B11/10515 ,  G11B11/10586

    摘要： A magneto-optical recording method employs a magneto-optical recording medium having a first magnetic layer which exhibits low coercive force at room temperature and high Curie temperature and a second magnetic layer which is exchange-coupled to the first magnetic layer and which exhibits a higher coercive force and a lower Curie temperature as compared with those of the first magnetic layer. A magnetic field modulated in accordance with information to be recorded is applied to the magneto-optical recording medium while irradiating it with a light beam of a constant intensity so as to record the information. The recorded information is simultaneously confirmed by using a reflected light of this light beam.

    摘要翻译： 磁光记录方法采用具有第一磁性层的磁光记录介质，该第一磁性层在室温和高居里温度下具有低的矫顽力，第二磁性层与第一磁性层交换耦合， 与第一磁性层相比，矫顽力和居里温度较低。 根据要记录的信息调制的磁场被施加到磁光记录介质，同时用恒定强度的光束照射它，以记录信息。 通过使用该光束的反射光同时确认所记录的信息。

    Magnetooptical recording medium allowing overwriting with two or more magnetic layers and recording method utilizing the same
    4.
    发明公开
    Magnetooptical recording medium allowing overwriting with two or more magnetic layers and recording method utilizing the same 失效
    具有带有两个或更多的磁性层覆盖的可能性，并且该介质使用的记录方法的磁光记录介质。

    公开(公告)号：EP0258978A2

    公开(公告)日：1988-03-09

    申请号：EP87306038.8

    申请日：1987-07-08

    申请人： CANON KABUSHIKI KAISHA

    发明人： Osato, Yoichi ,  Kawade, Hisaaki ,  Fujii, Eiichi ,  Kasama, Nobuhiro ,  Kobayashi, Tadashi

    IPC分类号： G11B11/10 ,  G11B13/04

    CPC分类号： G11B11/10506 ,  G11B11/10519 ,  G11B11/10586 ,  G11B11/10591

    摘要： A magnetooptical recording medium provided with a first magnetic layer and a second magnetic layer having a higher Curie point and a lower coercive force than those of said first magnetic layer and being exchange coupled with said first magnetic layer is disclosed. That satisfies a relation: wherein H H is the coercive force of the first magnetic layer; H L is the coercive force of the second magnetic layer: M s is the saturation magnetization of the second magnetic layer; h is the thickness thereof; and σ W is the magnetic wall energy between the first and second magnetic layers.

    摘要翻译： 设置有耦合到所述第一磁性层上的第一磁性层（2）和（3）具有较高的居里点的第二磁性层和下的矫顽力比所述第一磁性层和被交换的磁光记录介质是光盘游离缺失。 也就是说SATIS FIES关系： worin HH是第一磁层的矫顽力; HL是第二磁性层的矫顽力：Ms为所述第二磁性层的饱和磁化强度; h是其厚度; 和sigma w是所述第一和第二磁性层之间的磁壁能量。

    Device, method and apparatus for optical modulation
    7.
    发明公开
    Device, method and apparatus for optical modulation 失效
    Verfahren undGerätzur optischen Aufnahme。

    公开(公告)号：EP0271900A2

    公开(公告)日：1988-06-22

    申请号：EP87118684.7

    申请日：1987-12-16

    申请人： CANON KABUSHIKI KAISHA

    发明人： Yoshinaga, Kazuo ,  Miyazaki, Takeshi ,  Ohnishi, Toshikazu ,  Kurabayashi, Yutaka ,  Takasu, Yoshio ,  Kobayashi, Tadashi

    IPC分类号： G11B9/02 ,  G11C13/04 ,  G02F1/05

    CPC分类号： G11B7/00557 ,  C09K19/38 ,  C09K19/3852 ,  C09K19/3857 ,  G02F1/133365 ,  G02F1/141 ,  G11B7/24 ,  G11B7/25 ,  G11B9/02

    摘要： An optical recording method comprises writing in a ferroelectric material heated at or above the glass transition point, and holding the resultant written state below the glass transition point. Preferably, the ferroelectric material constituting the optical recording layer has an optical thickness capable of providing a multiple reflection state. The multiple reflection state of the optical recording layer is locally changed at or above the glass transition point by irradiating the optical recording layer under an electric field with a laser beam in order to write in the optical recording layer.

    摘要翻译： 光学记录方法包括在玻璃化转变点处或以上加热的铁电体中书写，并将得到的写入状态保持在玻璃化转变点以下。 优选地，构成光记录层的铁电体具有能够提供多重反射状态的光学厚度。 通过在激光束的电场下照射光学记录层以便在光学记录层中写入光学记录层的多重反射状态在玻璃化转变点处或以上局部变化。