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138 条记录 (耗时 0.023 秒)

    Optical disk
    4.
    发明公开
    Optical disk 审中-公开
    Optische普拉特

    公开(公告)号：EP0918323A2

    公开(公告)日：1999-05-26

    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： 本发明的光盘包括在光记录膜的相反侧的光盘入射侧形成的透明电介质膜，以将透明基板夹在其间，用于抑制由热膨胀差引起的双金属效应 在形成在光学记录表面上的光学记录膜与透明基板之间，由此可以抑制倾斜温度变化的变化。 此外，通过对透明电介质膜的反射率的最佳选择，可以同时减少由于多次干涉引起的不期望的反射。

    Magneto-optical recording medium and a reproducing method using such a medium
    5.
    发明公开
    Magneto-optical recording medium and a reproducing method using such a medium 失效
    磁光介质，和重放方法来

    公开(公告)号：EP0822547A3

    公开(公告)日：1998-09-09

    申请号：EP97305719.3

    申请日：1997-07-30

    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： G11B11/10593 ,  G11B11/10515 ,  Y10S428/90 ,  Y10T428/26 ,  Y10T428/265

    摘要： A super-resolution magneto-optical recording medium has a reproducing layer, an in-plane magnetization layer and a recording layer. The reproducing layer and the recording layer are magnetostatically coupled, and each of the layers is made of a rare-earth transition-metal alloy which has a greater transition-metal sublattice moment than the compensation composition, and exhibits perpendicular magnetization, if it exists alone. At a temperature not more than the Curie temperature, the in-plane magnetization layer is exchange-coupled with the reproducing layer so as to allow the reproducing layer to exhibit in-plane magnetization. Since the reproducing layer is allowed to exhibit in-plane magnetization by the in-plane magnetization layer, it is not necessary to use a material containing a greater rare-earth metal sublattice moment as the reproducing layer. Therefore, at portions in the in-plane magnetization layer having temperatures higher than the Curie temperature, the directions of the transition-metal sublattice moments of the reproducing layer and the recording layer are aligned in parallel with each other. Thus, the reproducing polarity of this medium becomes the same as the polarity of a magneto-optical recording medium without a reproducing layer, thereby allowing compatibility with each other.

    Magneto-optical recording and reproducing device
    7.
    发明公开
    Magneto-optical recording and reproducing device 失效
    一种用于磁 - 光记录和回放。

    公开(公告)号：EP0606129A3

    公开(公告)日：1996-10-02

    申请号：EP94300001.8

    申请日：1994-01-04

    申请人： SHARP KABUSHIKI KAISHA

    发明人： Murakami, Yoshiteru ,  Takahashi, Akira ,  Nakajima, Junsaku ,  Ohta, Kenji

    IPC分类号： G11B11/10

    CPC分类号： G11B11/10586 ,  G11B11/10515 ,  G11B11/10543

    摘要： A magneto-optical recording and reproducing device is provided with a magneto-optical disk (201) for reproducing recorded information using light, a semiconductor laser (101), an objective lens (105) for converging a light beam emitted from the semiconductor laser onto the magneto-optical disk and a light interrupting member (120) for interrupting a portion of a light beam before it is incident on the objective lens. The magneto-optical disk is composed of a readout layer which is predominant in in-plane magnetization, and in which a transition occurs to be predominant in perpendicular magnetization as temperature thereof is raised and a recording layer for recording thereon information using a perpendicular magnetization. In this arrangement, since the light interrupting member is provided, a light spot can be made smaller, thereby improving a recording density. Moreover, even when temperature of the readout layer is raised due to a side lobe generated by the light interrupting member, in-plane magnetization is maintained in the readout layer. Thus, interference by unwanted reproducing signals due to the side lobe can be prevented, thereby improving a reproducing signal quality.

    Optical disk and method for reproducing information recorded on the same
    9.
    发明公开
    Optical disk and method for reproducing information recorded on the same 失效
    Optische Scheibe und Verfahren zur Wiedergabe darauf aufgezeichneter信息。

    公开(公告)号：EP0656625A1

    公开(公告)日：1995-06-07

    申请号：EP94308870.8

    申请日：1994-11-30

    申请人： SHARP KABUSHIKI KAISHA

    发明人： Murakami, Yoshiteru ,  Takahashi, Akira ,  Ohta, Kenji

    IPC分类号： G11B11/10 ,  G11B7/007

    CPC分类号： G11B11/10515 ,  G11B7/00718 ,  G11B7/00745 ,  G11B7/0938 ,  G11B11/10578

    摘要： On an optical disk, information is recorded on both grooves and lands as guide tracks for guiding a light beam. The width of each groove and that of each land are set substantially equal to each other. A plurality of series of pits representing address information are formed in the grooves so that the series of pits in a groove and the series of pits in the adjacent grooves are located in different radial directions of the optical disk. Address pits are not formed in any of the tracks formed by the lands. When the light beam scans the track on the land, the address information is obtained by crosstalk of the series of address pits formed in the track on the groove. This structure enables the management of the addresses of tracks having thereon no address pits. When obtaining the address information by reproducing the series of address pits on the groove, since no crosstalk occurs, accurate address information is obtained.

    摘要翻译： 在光盘上，信息被记录在两个凹槽和平台上，作为用于引导光束的导轨。 每个槽的宽度和每个焊盘的宽度被设定为基本相等。 在凹槽中形成表示地址信息的多个凹坑系列，使得凹槽中的一系列凹坑和相邻凹槽中的一系列凹坑位于光盘的不同径向方向上。 地址坑不形成在由平台形成的任何轨道中。 当光束扫描地面上的轨道时，通过在凹槽中的轨道中形成的一系列地址坑的串扰获得地址信息。 这种结构使得能够管理其上没有地址坑的轨道的地址。 当通过再现凹槽上的一系列地址凹坑获得地址信息时，由于没有发生串扰，因此获得准确的地址信息。