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138 条记录 (耗时 0.021 秒)

    Optical disk
    53.
    发明公开
    Optical disk 审中-公开
    光盘

    公开(公告)号：EP0918323A3

    公开(公告)日：2000-08-30

    申请号：EP98120847.3

    申请日：1998-11-03

    申请人： Sharp Kabushiki Kaisha

    发明人： Mori, Go ,  Mieda, Michinobu ,  Iketani, Naoyasu ,  Suzuki, Ippei ,  Murakami, Yoshiteru ,  Takahashi, Akira

    IPC分类号： G11B7/24

    CPC分类号： G11B7/252 ,  G11B7/24056 ,  G11B7/24067 ,  G11B7/2533 ,  G11B7/2534 ,  G11B7/2542 ,  G11B7/2578 ,  G11B11/10584 ,  G11B2007/25706 ,  G11B2007/25708 ,  G11B2007/2571 ,  G11B2007/25713 ,  G11B2007/25715 ,  G11B2007/25718

    摘要： An optical disk of the present invention includes a transparent dielectric film formed on a light incident side of the disk on an opposite side of an optical recording film so as to sandwich the transparent substrate therebetween, for suppressing bimetallic effects caused by a difference in thermal expansion between an optical recording film formed on an optical recording surface and the transparent substrate, whereby changes in tilt against temperature changes can be suppressed. Further, by an optimal selection of a reflectance of the transparent dielectric film, unwanted reflection due to multi-interference can be reduced at the same time.

    摘要翻译： 本发明的光盘在光盘的与光学记录膜相反一侧的光入射侧上形成透明介质膜，以将透明衬底夹在中间，用于抑制由热膨胀差异引起的双金属效应 在光学记录表面上形成的光学记录膜与透明基板之间，由此可以抑制对温度变化的倾斜的变化。 此外，通过对透明介电膜的反射率的最佳选择，可以同时减少由于多重干涉引起的不希望的反射。

    Magneto-optical recording medium and method of reproducing information from the same
    57.
    发明公开
    Magneto-optical recording medium and method of reproducing information from the same 失效
    Magneto-optisches Aufzeichnungsmedium und Verfahren zur Informationswiedergabe

    公开(公告)号：EP0821354A2

    公开(公告)日：1998-01-28

    申请号：EP97305512.2

    申请日：1997-07-23

    申请人： SHARP KABUSHIKI KAISHA

    发明人： Hirokane, Junji ,  Murakami, Yoshiteru ,  Takahashi, Akira

    IPC分类号： G11B11/10

    CPC分类号： G11B11/10515 ,  G11B11/10584 ,  G11B11/10586

    摘要： A magneto-optical recording medium of the present invention has a recording layer made of a perpendicular magnetization film, and a readout layer which is in an in-plane magnetization state at room temperature and changes into a perpendicular magnetization state with a rise in temperature. When the magneto-optical recording medium is irradiated with a light beam, the readout layer separates into three regions: a region in an in-plane magnetization state, a region in a perpendicular magnetization state, and a region having a temperature not lower than the Curie temperature thereof. Only the region in the perpendicular magnetization state allows copying of the magnetization of the recording layer. Therefore, even when the diameter and intervals of recording bits on the recording layer are very small, it is possible to reproduce a target recording bit separately from a recording bit adjacent to the target recording bit.

    摘要翻译： 本发明的磁光记录介质具有由垂直磁化膜构成的记录层和在室温下处于面内磁化状态的读出层，随着温度的升高而变为垂直磁化状态。 当磁光记录介质被光束照射时，读出层分为三个区域：面内磁化状态的区域，垂直磁化状态的区域和温度不低于 居里温度 只有在垂直磁化状态下的区域允许复制记录层的磁化。 因此，即使当记录层上的记录位的直径和间隔非常小时，也可以与目标记录位相邻的记录位分开再现目标记录位。