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36 条记录 (耗时 0.027 秒)

    Optical disk having virtually constant width recording track and optical disk apparatus
    33.
    发明授权
    Optical disk having virtually constant width recording track and optical disk apparatus 失效
    具有实际上恒定宽度的记录轨道和光盘装置的光盘

    公开(公告)号：US06122233A

    公开(公告)日：2000-09-19

    申请号：US15011

    申请日：1998-01-28

    申请人： Naoyasu Iketani ,  Go Mori ,  Michinobu Mieda ,  Yoshiteru Murakami ,  Junji Hirokane ,  Akira Takahashi

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

    IPC分类号： G11B7/24 ,  G11B7/00 ,  G11B7/005 ,  G11B7/007 ,  G11B11/105 ,  G11B7/09

    CPC分类号： G11B7/00745 ,  G11B11/10563 ,  G11B11/10565 ,  G11B7/00718

    摘要： In an optical disk, grooves and lands serving as recording tracks are provided, the grooves are shaped so as to have virtually the same width, and in a first region, the two side walls of each groove wind in accordance with address information. The first region of the groove is formed with its leading portion located at the same angular position as the leading portion of at least one of the first regions of the adjacent grooves. Moreover, the winding portions corresponding to respective bits of the address information are formed in a manner so as to synchronize to the adjacent grooves. With this arrangement, it becomes possible to easily detect address information from the grooves and lands, and consequently to obtain an information reproducing signal with high quality.

    摘要翻译： 在光盘中，设置有用作记录轨迹的凹槽和凹槽，这些凹槽成形为具有实质上相同的宽度，并且在第一区域中，每个凹槽的两个侧壁根据地址信息而变风。 凹槽的第一区域形成有其前端部分位于与相邻凹槽的第一区域中的至少一个的前端部分相同的角位置。 此外，与地址信息的各个位对应的绕组部分以与相邻槽同步的方式形成。 利用这种布置，可以容易地从凹槽和平台检测地址信息，从而获得高质量的信息再现信号。

    Magneto-optical recording medium and producing method thereof
    34.
    发明授权
    Magneto-optical recording medium and producing method thereof 失效
    磁光记录介质及其制造方法

    公开(公告)号：US5922177A

    公开(公告)日：1999-07-13

    申请号：US112930

    申请日：1998-07-09

    申请人： Naoyasu Iketani ,  Yoshiteru Murakami ,  Akira Takahashi ,  Kenji Ohta

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

    IPC分类号： C23C14/18 ,  C23C14/34 ,  G11B7/26 ,  G11B11/105 ,  C23C14/00 ,  C23C14/32

    CPC分类号： C23C14/3407 ,  C23C14/185 ,  G11B11/10582 ,  G11B11/10586 ,  G11B7/26

    摘要： A method to produce a magneto-optical recording medium which includes a readout layer having in-plane magnetization at room temperature and in which a transition occurs from in-plane magnetization to a perpendicular magnetization when temperature rises, and a recording layer for storing information thereon magneto-optically. In the readout layer made of GdFeCo by adding Nd thereto, an amount of Nd to be added changes in a direction perpendicular to its film surface, and an amount of Nd is larger on a light incidence side than on the other side. As a result, even when a laser with a short wavelength is used, high density recording can be achieved as undesirable recording and reproducing operations due to a change in a magnetic interaction is prevented and also deterioration in quality of a reproducing signal is prevented.

    摘要翻译： 一种制造磁光记录介质的方法，其包括在室温下具有面内磁化的读出层，并且其中当温度升高时从面内磁化转变为垂直磁化，并且在其上存储信息的记录层 磁光学。 在通过添加Nd而由GdFeCo制成的读出层中，要添加的Nd的量在垂直于其膜表面的方向上变化，并且Nd的量在光入射侧比在另一侧更大。 结果，即使使用具有短波长的激光器，由于防止了磁相互作用的变化而导致由于不期望的记录和再现操作而导致高密度记录，并且也防止再现信号的质量劣化。

    Method for reproducing optical disk
    35.
    发明授权
    Method for reproducing optical disk 失效
    光盘再现方法

    公开(公告)号：US5909412A

    公开(公告)日：1999-06-01

    申请号：US977206

    申请日：1997-11-24

    申请人： Junichiro Nakayama ,  Naoyasu Iketani ,  Michinobu Mieda ,  Yoshiteru Murakami ,  Akira Takahashi

    发明人： Junichiro Nakayama ,  Naoyasu Iketani ,  Michinobu Mieda ,  Yoshiteru Murakami ,  Akira Takahashi

    IPC分类号： G11B7/00 ,  G11B7/005 ,  G11B7/007 ,  G11B7/09 ,  G11B27/19 ,  G11B27/30 ,  G11B17/22

    CPC分类号： G11B7/24082 ,  G11B27/19 ,  G11B27/3027 ,  G11B7/0903 ,  G11B7/0938

    摘要： In a method for reproducing an optical disk of the present invention, address information of an optical disk, provided with tracking guides composed of (1) a wobbling groove wobbled in accordance with address information and (2) a normal groove which is not wobbled, is reproduced. The wobbling groove and the normal groove are alternately provided in a radius direction of the optical disk. When carrying out recording and reproducing of the optical disk, three beams composed of one main beam and two sub beams are used. The three beams are projected so that (a) the sub beams are respectively on the wobbling groove and the normal groove and (b) the main beam is on a land between the wobbling groove and the normal groove. The address information is found from reflected light of one of the sub beams. The above arrangement allows respective central portions of the sub beams to track the tracking guides. Therefore, even in the case where the optical disk is tilted or vibrated, the sub beams do not deviate totally off the tracking guides, thereby permitting to stably reproduce the address information.

    摘要翻译： 在本发明的再现光盘的方法中，具有由（1）根据地址信息摆动的摆动槽和（2）未摆动的正常槽构成的跟踪引导件的光盘的地址信息， 被转载。 在光盘的半径方向交替设置摆动槽和法线槽。 当执行光盘的记录和再现时，使用由一个主光束和两个子光束组成的三个光束。 这三个光束被投影，使得（a）子光束分别位于摆动槽和普通槽上，（b）主光束位于摆动槽和正常槽之间的焊盘上。 从一个子光束的反射光中找到地址信息。 上述布置允许子光束的各个中心部分跟踪跟踪引导件。 因此，即使在光盘倾斜或振动的情况下，子光束也不完全偏离跟踪引导件，从而允许稳定地再现地址信息。