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248 条记录 (耗时 0.02 秒)

    Optical disk
    4.
    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/reproducing device
    7.
    发明公开
    Magneto-optical recording/reproducing device 失效
    Magnetooptische Aufzeichnungs- / Wiedergabevorrichtung

    公开(公告)号：EP0827143A3

    公开(公告)日：2000-01-19

    申请号：EP97203052.2

    申请日：1991-06-13

    申请人： SHARP KABUSHIKI KAISHA

    发明人： Ohta, Kenji ,  Takahashi, Akira ,  Muramatsu, Tetsurou ,  Yamamoto, Tatsushi ,  Ishikawa, Toshio

    IPC分类号： G11B13/04 ,  G11B5/00 ,  G11B11/10 ,  G11B11/14

    CPC分类号： G11B13/045 ,  G11B5/00 ,  G11B5/1278 ,  G11B5/1871 ,  G11B2005/0002 ,  G11B2005/0005 ,  G11B2005/0021

    摘要： A magneto-optical recording/reproducing device which records information by irradiating a light beam (1) of constant intensity on a magneto-optical recording medium while simultaneously applying a magnetic field thereon through a recording magnetic head (5); and which reproduces the recorded information through a reproducing magnetic head (7). The magneto-optical recording medium has a magnetic film (4) formed on a translucent substrate (3) and the magnetic field applied through the recording magnetic head (5) reverses in response to the information to be recorded. The recording magnetic head (5) and the reproducing magnetic head (7) are integrally provided on a single magnetic core (10) in order to set their positions easily with respect to each other. By making a magnetic core end-face (12) of the reproducing magnetic head smaller than a light beam spot (14), information recorded on areas smaller than the light beam spot can be reproduced. A large reproduced output may be achieved by using a magneto-optical recording medium which has a soft magnetic material layer made of soft magnetic material provided between the substrate and the magnetic film.

    摘要翻译： 一种磁光记录/再现装置，其通过在磁光记录介质上照射恒定强度的光束来记录信息，同时通过记录磁头在其上施加磁场; 并且通过再现磁头再现记录的信息。 磁光记录介质具有形成在透光性基板上的磁性膜，并且通过记录磁头施加的磁场响应于待记录的信息而反转。 记录磁头和再现磁头一体地设置在单个磁芯上，以便容易地相对于彼此设置它们的位置。 通过使再现磁头的磁芯端面小于光束点，可以再现记录在比光束点小的区域上的信息。 可以通过使用具有由设置在基板和磁性膜之间的软磁材料制成的软磁性材料层的磁光记录介质来实现大的再现输出。

    Optical disk and method of manufacturing an optical disk
    10.
    发明公开
    Optical disk and method of manufacturing an optical disk 失效
    Optische Platte und Verfahren zur Herstellung einer optischen Platte

    公开(公告)号：EP0851416A2

    公开(公告)日：1998-07-01

    申请号：EP98103353.3

    申请日：1993-05-14

    申请人： SHARP KABUSHIKI KAISHA

    发明人： Inui, Tetsuya ,  Takahashi, Akira ,  Ohta, Kenji

    IPC分类号： G11B7/26 ,  G11B7/007

    CPC分类号： G11B11/10565 ,  G11B7/0045 ,  G11B7/00718 ,  G11B7/00745 ,  G11B7/0938 ,  G11B7/24079 ,  G11B7/24085 ,  G11B7/261 ,  G11B11/10578 ,  G11B11/10582

    摘要： A method of manufacturing an optical disk includes using a master disk produced from a pattern formed by projecting two light spots onto photosensitive material so that areas of said photosensitive material exposed to a first light spot form a pattern of spiral or concentric grooves and areas of said photosensitive material exposed to a second light spot form a predetermined pit pattern in land portions.
    The optical disk includes concentric or spiral grooves, a first series of pits formed in the interrupted portions and a second series of pits formed in portion of lands. Both of the first and second series of pits represent address information. The portions of the lands and the interrupted portions of the grooves are located in different radial directions. With this arrangement, even when the optical disk has a reduced track pitch, accurate address information is obtained, achieving a high-density recording optical disk.

    摘要翻译： 一种制造光盘的方法包括使用由通过将两个光斑投影到感光材料上而形成的图案的母盘，使得暴露于第一光点的所述感光材料的区域形成螺旋或同心凹槽的图案和所述 暴露于第二光点的感光材料在陆地部分形成预定的凹坑图案。 光盘包括同心或螺旋形凹槽，形成在间断部分中的第一系列凹坑和形成在凹槽部分中的第二系列凹坑。 第一和第二系列凹坑都代表地址信息。 槽脊的部分和槽的中断部分位于不同的径向。 利用这种布置，即使当光盘具有减小的轨道间距时，获得准确的地址信息，实现高密度记录光盘。