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138 条记录 (耗时 0.018 秒)

    Sectored arrangement of wobble sections on an optical disk
    84.
    发明公开
    Sectored arrangement of wobble sections on an optical disk 失效
    在Sektoren angeordnete Wobble-Bereiche auf einer optischen Disk

    公开(公告)号：EP0818778A3

    公开(公告)日：1999-12-15

    申请号：EP97111464.0

    申请日：1997-07-07

    申请人： SHARP KABUSHIKI KAISHA

    发明人： Inui, Tetsuya ,  Sato, Hideaki ,  Nakayama, Junichiro ,  Iketani, Naoyasu ,  Mieda, Michinobu ,  Murakami, Yoshiteru ,  Hirokane, Junji ,  Takahashi, Akira

    IPC分类号： G11B7/09

    CPC分类号： G11B7/005 ,  G11B7/00718 ,  G11B7/00745 ,  G11B7/0901 ,  G11B7/0938 ,  G11B7/24 ,  G11B7/261 ,  G11B11/10578 ,  G11B11/10582

    摘要： An optical disk has address recording sections each of which has a wobbled part of one of side walls of a groove. Each address recording section is formed by providing convexes of a groove in an adjacent land so as to widen the groove. With the wobbles thus provided in a concavo-convex form, address information is recorded. Besides, the address recording sections thus provided in the grooves are linearly disposed in radial directions of the optical disk. By thus arranging the optical disk on whose grooves and/or lands information is recorded, mixing of wobble frequency components in reproduced information signals does not occur, the sector method is applicable to the optical disk, and information signals of high quality can be obtained.

    摘要翻译： 光盘具有地址记录部分，每个地址记录部分具有凹槽的一个侧壁的摆动部分。 每个地址记录部分通过在相邻的凸台中提供凹槽的凸起来形成，以便加宽凹槽。 由于摆动形式呈凹凸形状，所以记录地址信息。 此外，这样设置在凹槽中的地址记录部分在光盘的径向上线性地设置。 通过这样布置记录有槽和/或焊盘信息的光盘，就不会在重放的信息信号中混合摆动频率分量，扇形方法可应用于光盘，并且可以获得高质量的信息信号。

    Magneto-optical memory medium and reproducing method thereof
    86.
    发明公开
    Magneto-optical memory medium and reproducing method thereof 失效
    Magneto-optisches Speichermedium unddazugehörigesWiedergabeverfahren

    公开(公告)号：EP0863504A2

    公开(公告)日：1998-09-09

    申请号：EP98104044.7

    申请日：1998-03-06

    申请人： Sharp Kabushiki Kaisha

    发明人： Takahashi, Akira ,  Mieda, Michinobu ,  Iketani, Naoyasu ,  Mori, Go ,  Nakajima, Junsaku ,  Murakami, Yoshiteru ,  Hirokane, Junji

    IPC分类号： G11B11/10

    CPC分类号： G11B11/10584 ,  G11B11/10515 ,  G11B11/10586 ,  G11B11/10593

    摘要： A magneto-optical memory medium according to the present invention comprises a reproducing layer, which has in-plane magnetization at room temperature and perpendicular magnetization when heated to above a predetermined temperature by a reproducing light beam; a recording layer, which is magnetostatically coupled to the reproducing layer; and an in-plane magnetized layer, provided adjacent to the recording layer, which has a Curie temperature at the above-mentioned predetermined temperature. In this medium, at temperatures below the predetermined temperature, signals recorded at high density in the recording layer are masked, and the above-mentioned magnetostatic coupling is suppressed, by magnetic masking by the in-plane magnetized layer. At temperatures above the predetermined temperature, however, within a domain forming part of the in-plane magnetized layer, the recording layer and the reproducing layer are magnetostatically coupled, and a recording bit of the recording layer is copied and expanded to a magnetic domain in the reproducing layer. Accordingly, with this medium, by reproducing from an expanded magnetic domain of the reproducing layer, even information from recording bits recorded at high density can be reproduced with high signal quality.

    摘要翻译： 根据本发明的磁光存储介质包括再现层，其在室温下具有面内磁化并且通过再现光束被加热到高于预定温度时的垂直磁化; 记录层，其被静磁耦合到再现层; 以及与记录层相邻的面内磁化层，居里温度在上述规定温度。 在该介质中，在低于预定温度的温度下，记录层中以高密度记录的信号被掩蔽，并且通过面内磁化层的磁屏蔽来抑制上述静磁耦合。 然而，在高于预定温度的温度下，在形成面内磁化层的一部分的区域内，磁静电耦合记录层和再现层，并且将记录层的记录位复制并扩展到磁畴 再现层。 因此，利用该介质，通过从再现层的扩展磁畴再现，可以以高信号质量再现以高密度记录的记录位的信息。

    Sectored arrangement of wobble sections on an optical disk
    87.
    发明公开
    Sectored arrangement of wobble sections on an optical disk 失效
    光盘具有分散的摆动部，制造方法，以及用于记录和再现的方法

    公开(公告)号：EP0818778A2

    公开(公告)日：1998-01-14

    申请号：EP97111464.0

    申请日：1997-07-07

    申请人： SHARP KABUSHIKI KAISHA

    发明人： Inui, Tetsuya ,  Sato, Hideaki ,  Nakayama, Junichiro ,  Iketani, Naoyasu ,  Mieda, Michinobu ,  Murakami, Yoshiteru ,  Hirokane, Junji ,  Takahashi, Akira

    IPC分类号： G11B7/09

    CPC分类号： G11B7/005 ,  G11B7/00718 ,  G11B7/00745 ,  G11B7/0901 ,  G11B7/0938 ,  G11B7/24 ,  G11B7/261 ,  G11B11/10578 ,  G11B11/10582

    摘要： An optical disk has address recording sections each of which has a wobbled part of one of side walls of a groove. Each address recording section is formed by providing convexes of a groove in an adjacent land so as to widen the groove. With the wobbles thus provided in a concavo-convex form, address information is recorded. Besides, the address recording sections thus provided in the grooves are linearly disposed in radial directions of the optical disk. By thus arranging the optical disk on whose grooves and/or lands information is recorded, mixing of wobble frequency components in reproduced information signals does not occur, the sector method is applicable to the optical disk, and information signals of high quality can be obtained.

    摘要翻译： 一种光盘具有地址记录部的每一个具有一个槽的侧壁中的一个的摆动部分。 每个地址记录部是通过在相邻的国家提供一个槽的凸部中，以扩大该槽形成。 在一个凹凸形状这样提供的摆动，地址信息被记录。 此外，在槽部这样提供的地址记录部在光盘的半径方向呈直线状地设置。 通过这样布置在谁的凹槽和/或连接盘信息被记录在光盘中，在再生信息信号的摆动频率分量的混合不会发生，扇区方法适用于光盘，和高质量的信息信号可以被得到。

    Magneto-optical recording medium and manufacturing method thereof
    90.
    发明公开
    Magneto-optical recording medium and manufacturing method thereof 失效
    Magnetooptisches Aufzeichnungsmedium und Verfahren zu seiner Herstellung。

    公开(公告)号：EP0657880A3

    公开(公告)日：1995-09-20

    申请号：EP94309031.6

    申请日：1994-12-05

    申请人： SHARP KABUSHIKI KAISHA

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

    IPC分类号： G11B11/10

    CPC分类号： C23C14/3414 ,  C23C14/185 ,  C23C14/568 ,  G11B11/10582 ,  G11B11/10586 ,  G11B11/10589

    摘要： A magneto-optical recording medium includes a readout layer has in-plane magnetization at room temperature and in which a transition occurs from in-plane magnetization to perpendicular magnetization when temperature thereof is raised, and a recording layer for recording thereon information. The composition of the readout layer varies in a direction perpendicular to the surface thereof, and in the readout layer, the Co density on the light incident side is higher than the Co density on the interface between the readout layer and the recording layer. Therefore, the Curie temperature on the reproducing light incident side of the readout layer is high and the the polar Kerr rotation angle in reproducing increases, thereby achieving improvements in a reproducing signal quality. On the other hand, since the Curie temperature on the interface is low, the shift of the threshold temperature at which a transition occurs from in-plane to perpendicular by the magnetic interaction between the layers can be suppressed, thereby achieving a high quality reproducing signal without changing the laser power required for reproduction very much.

    摘要翻译： 磁光记录介质包括读出层，其在室温下具有面内磁化，并且其温度升高时从面内磁化转变为垂直磁化，并且在其上记录信息的记录层。 读出层的组成在垂直于其表面的方向上变化，并且在读出层中，光入射侧的Co密度高于读出层和记录层之间的界面上的Co密度。 因此，读出层的再现光入射侧的居里温度高，再现时的极性克尔旋转角度增加，从而实现再现信号质量的改善。 另一方面，由于界面的居里温度低，因此能够抑制由层间的磁性相互作用而发生从平面到垂直的阈值温度的偏移，从而实现高品质的再现信号 而不需要更改再生所需的激光功率。