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138 条记录 (耗时 0.017 秒)

    Magneto-optical recording medium
    12.
    发明公开
    Magneto-optical recording medium 失效
    磁光记录介质

    公开(公告)号：EP0509836A3

    公开(公告)日：1993-07-14

    申请号：EP92303487.0

    申请日：1992-04-16

    申请人： SHARP KABUSHIKI KAISHA

    发明人： Takahashi, Akira ,  Murakami, Yoshiteru ,  Nakajima, Junsaku ,  Ohta, Kenji ,  Nakayama, Junichiro ,  Katayama, Hiroyuki ,  Mieda, Michinobu

    IPC分类号： G11B11/10

    CPC分类号： G11B11/10593 ,  G11B11/10506 ,  G11B11/10515 ,  G11B11/10517 ,  G11B11/10586 ,  Y10S428/90 ,  Y10T428/26 ,  Y10T428/265

    摘要： A magneto-optical recording medium has a recording layer whereon information is magneto-optically recorded. A readout layer is provided on the recording layer. The readout layer has a compensating temperature that is located between room temperature and the Curie temperature. In the readout layer, upon an application of a light beam, the in-plane magnetization occurs at room temperature and a transition from the in-plane magnetization to vertical magnetization occurs as the temperature of the irradiated area of the readout layer rises above a predetermined temperature. By employing this magneto-optical recording medium, with an application of a light beam that is intensity modulated into two levels, only a spot having a temperature not less than a predetermined temperature is involved in the reproduction; therefore, a recorded bit with a size smaller than the diameter of the light beam can be reproduced, thereby greatly increasing the recording density. Further, the level of the reproduced signals is increased, and crosstalk from the adjoining tracks is reduced; thus, information recording and overwriting can be conducted more easily.

    Magneto-optical recording medium and method for processing the surface
    16.
    发明公开
    Magneto-optical recording medium and method for processing the surface 失效
    MagnetooptischerAufzeichnungsträgerund Verfahren zur Bearbeitung seinerOberfläche。

    公开(公告)号：EP0441611A1

    公开(公告)日：1991-08-14

    申请号：EP91300969.2

    申请日：1991-02-06

    申请人： SHARP KABUSHIKI KAISHA

    发明人： Nakayama, Junichiro ,  Murakami, Yoshiteru ,  Katayama, Hiroyuki ,  Ohta, Kenji

    IPC分类号： G11B13/04 ,  G11B11/10

    CPC分类号： G11B5/6005 ,  G11B11/1058 ,  G11B11/10584 ,  Y10S428/90 ,  Y10S428/928 ,  Y10T428/218 ,  Y10T428/24355 ,  Y10T428/31935

    摘要： A surface of a magneto-optical recording medium of the present invention is textured with fine and physical protrusions and recessions. The shapes of physical protrusions and recessions vary at each radial locations on the medium such that, for example, rough protrusions and recessions are formed in inner parts of the recording medium and fine protrusions and recessions are formed in outer parts thereof. Therefore, floating force given to a floating head from the medium being rotated based on the constant angular velocity method through an air layer in the outer parts equals floating force in the inner parts. Consequently, since the floating height of the floating head becomes constant irrespective of radial locations on the medium, information can be recorded under constant recording conditions, permitting the accuracy of the recording to improve. Regarding a method for processing the surface of a magneto-optical recording medium relating to the present invention, for example, a texture tape whose roughness is large is used in inner parts of the medium while a texture tape whose roughness is small is used in outer parts thereof. As a result, a magneto-optical recording medium having the above characteristics is produced.

    摘要翻译： 本发明的磁光记录介质的表面具有精细和物理的突出和凹陷的纹理。 物理突起和凹陷的形状在介质上的每个径向位置处变化，使得例如在记录介质的内部部分中形成粗糙的突起和凹陷，并且在其外部形成微小的突起和凹陷。 因此，通过外部部分中的空气层，基于恒定的角速度方法旋转的介质的浮动头的浮动力等于内部部分中的浮力。 因此，由于浮动头的浮动高度与介质上的径向位置无关地变得恒定，所以可以在恒定的记录条件下记录信息，从而可以提高记录的准确性。 关于本发明的磁光记录介质的表面的处理方法，例如，在粗糙度小的纹理带用于外部的粗糙度较小的纹理带时，粗糙度大的纹理带用于介质的内部， 其部分。 结果，产生具有上述特性的磁光记录介质。

    Recording and reproducing device for magneto-optical card
    18.
    发明公开
    Recording and reproducing device for magneto-optical card 失效
    Aufzeichnungs- und Wiedergabeanordnungfürmagnetooptische Karte。

    公开(公告)号：EP0323232A2

    公开(公告)日：1989-07-05

    申请号：EP88312367.1

    申请日：1988-12-28

    申请人： SHARP KABUSHIKI KAISHA

    发明人： Takahashi, Akira ,  Murakami, Yoshiteru ,  Nakayama, Junichiro ,  Ohta, Kenji ,  Katayama, Hiroyuki ,  Mieda, Michinobu

    IPC分类号： G11B11/10

    CPC分类号： G11B11/10565 ,  G11B7/0033 ,  G11B11/10556 ,  G11B11/1056 ,  G11B11/10563 ,  G11B17/34

    摘要： The device comprises an optical head (2) for irradiating a magneto-optical recording medium of an magneto-optical card (1) taken into the device with laser beam, a magnet field generator (6) for applying a biased magnetic field to said magneto-optical recording medium and an optical system manipulating mechanism for the optical system of the above-mentioned optical head for varying the spot irradiated by the laser beam, wherein the optical head is fixed to the main frame of the device, the magneto-optical card is supported where it is irradiated by the laser beam emitted from the optical head, this magneto-optical card is moved horizontally in a plane parallel to the surface of the magneto-optical card for rough searching and then a part (7) or the whole of the magnetic field generator (6) is moved to come into contact with the magneto-optical card to stop the vibration of the magneto-optical card and then the spot to be irradiated by the laser beam is varied by means of the optical system of the optical head for access to the magneto-optical card to be done thereby.

    摘要翻译： 该装置包括用于照射带有激光束的装置中的磁光卡（1）的磁光记录介质的光学头（2），用于向所述磁体施加偏置磁场的磁场发生器（6） - 光学记录介质和用于改变由激光束照射的光斑的上述光学头的光学系统的光学系统操纵机构，其中光学头固定到装置的主框架，磁光卡 被支撑在被从光头发射的激光束照射的地方，该磁光卡在平行于磁光卡的表面的平面中水平移动，用于粗略搜索，然后是部分（7）或整体 使磁场发生器（6）移动以与磁光卡接触以停止磁光卡的振动，然后通过光学系统改变要被激光束照射的点 用于访问磁光卡的光学头的杆由此完成。

    Magneto-optic memory device
    19.
    发明公开
    Magneto-optic memory device 失效
    磁光探测器。

    公开(公告)号：EP0321250A2

    公开(公告)日：1989-06-21

    申请号：EP88311888.7

    申请日：1988-12-15

    申请人： SHARP KABUSHIKI KAISHA

    发明人： Murakami, Yoshiteru ,  Nakayama, Junichiro ,  Hiramatsu, Ichiro ,  Takahashi, Akira ,  Ohta, Kenji ,  Van, Kazuo ,  Katayama, Hiroyuki

    IPC分类号： G11B11/10 ,  G11B5/64

    CPC分类号： G11B5/64 ,  G11B11/10582

    摘要： A magneto-optic memory device comprising:


    (a) a pair of opposed substrates (1, 8) at least one of which is transparent,
    (a) a magneto-optic memory layer composed of a dielectric film (2), a rare earth-transition metal alloy thin film (3), a dielectric film (4) and a light reflecting film (5) in this order on the surface of the transparent substrate opposed to the other substrate,
    (c) an adhesive layer (7) covering the memory layer and bonding the transparent substrate to the other substrate, and
    (d) a metal nitride film (6) interposed between the light reflecting film of the memory layer and the adhesive layer,
    which is useful as a magneto-optic disk or magneto-optic card.

    摘要翻译： 一种磁光存储器件，包括：（a）一对相对的基板（1,8），其中至少一个是透明的，（a）由介电膜（2），稀土 过渡金属合金薄膜（3），电介质膜（4）和光反射膜（5），在与其他基板相对的透明基板的表面上，（c）覆盖 存储层并将透明基板接合到另一基板，以及（d）插入在存储层的光反射膜和粘合剂层之间的金属氮化物膜（6），其可用作磁光盘或磁光 - 光卡。

    Magneto-optic memory medium
    20.
    发明公开
    Magneto-optic memory medium 失效
    磁光探测器。

    公开(公告)号：EP0310392A2

    公开(公告)日：1989-04-05

    申请号：EP88309048.2

    申请日：1988-09-29

    申请人： SHARP KABUSHIKI KAISHA

    发明人： Miyake, Tomoyuki ,  Murakami, Yoshiteru ,  Van, Kazuo ,  Takahashi, Akira ,  Mieda, Michinobu ,  Ohta, Kenji

    IPC分类号： G11B5/64 ,  G11B11/10

    CPC分类号： G11B11/10591 ,  G11B5/64

    摘要： A magneto-optic memory medium of an amorphous alloy having uniaxial magnetic anisotropy and prepared by incorporating 2 to 15 atom mol % of yttrium Y into an alloy represented by the formula
    (Gd α Tb 1-α ) 1-β A β
    wherein A is a transition metal, and α and β satisfy the requirements of 0.5 ≦ α ≦ 0.7 and 0.6

    摘要翻译： 一种具有单轴磁各向异性的非晶合金的磁光存储介质，其通过将2至15原子％的钇Y掺入由式（GdαTb 1-α）1-βAβ表示的合金中制备，其中A为 过渡金属，α和β满足0.5≤α≤0.6,0.6≤β≤0.8的要求。