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262 条记录 (耗时 0.012 秒)

    Information recording and reproducing device
    81.
    发明公开
    Information recording and reproducing device 失效
    信息记录和复制设备

    公开(公告)号：EP0485234A3

    公开(公告)日：1993-03-17

    申请号：EP91310364.4

    申请日：1991-11-08

    申请人： SHARP KABUSHIKI KAISHA

    发明人： Maeda, Shigemi ,  Kojima, Kunio ,  Akiyama, Jun ,  Terashima, Shigeo ,  Numata, Tomiyuki

    IPC分类号： G11B20/10 ,  G11B7/00 ,  G11B11/10 ,  G11B27/30 ,  G11B19/24

    CPC分类号： G11B20/10 ,  G11B7/004 ,  G11B7/08505 ,  G11B11/10504 ,  G11B11/10515 ,  G11B11/10563 ,  G11B19/12 ,  G11B19/24 ,  G11B20/1403 ,  G11B21/085 ,  G11B27/327 ,  G11B2020/1087 ,  G11B2020/10888 ,  G11B2220/20 ,  G11B2220/2525

    摘要： An information recording and reproducing device has a first recording clock generation circuit (106) which generates a clock based on pre-recorded information on a magneto-optical disk (101), a second recording clock generation circuit (107) and a switching circuit (117). The switching circuit (117) selects a first recording clock (e) when recording information is of discrete information (j) and selects a second recording clock (f) when recording information is of successive information (i). Moreover, in the present device, a first reading clock (fr) is used as well as a second clock (fr′) as a clock for reading out the reproduced data from the magneto-optical disk (1), which had been once stored in memory (15). The second reading clock having a reference frequency is generated by a second clock generation circuit (11) and is used for reading out successive information such as music information. The first reading clock in synchronisation with the reproduced signal is generated by a first reading clock generation circuit (9) and is used for reading out discrete information such as computer-use data. In addition, in the case of discrete information, it is possible to start the recording/reproducing operation immediately after an optical head reaches a desired position, thereby permitting a shortened access time.

    MAGNETOOPTIC RECORDING MEDIUM, AND METHOD OF MAGNETOOPTIC RECORDING AND REPRODUCTION
    83.
    发明公开
    MAGNETOOPTIC RECORDING MEDIUM, AND METHOD OF MAGNETOOPTIC RECORDING AND REPRODUCTION 失效
    Magnetooptisches Aufzeichnungsmedium，und Verfahren zur magnetooptischen Aufzeichnung und Wiedergabe。

    公开(公告)号：EP0478786A1

    公开(公告)日：1992-04-08

    申请号：EP91905901.4

    申请日：1991-03-22

    申请人： SEIKO EPSON CORPORATION

    发明人： KAWASE, Takeo, 3-5, Owa 3-chome

    IPC分类号： G11B11/10

    CPC分类号： G11B11/10586 ,  G11B11/10504 ,  G11B11/10515

    摘要： The object of the invention is to realize large-capacity recording based on the multilayer recording. The magnetooptic recording medium consists of multilayered vertically magnetizing films, capable of storing information even in layers other than the first layer which is closest to a source of light. The layers have higher Curie temperatures, as they are more distant from the source of light. In the magnetooptic reproducing method using the above recording medium, the information stored in a magnetic domain pattern of a layer is transferred to a layer closer to the source of light. To record information in the medium, external magnetic field is applied so that information is written successively from the layer having highest Curie temperature.

    摘要翻译： 本发明的目的是实现基于多层记录的大容量记录。 磁光记录介质由多层垂直磁化膜组成，其能够甚至在最靠近光源的第一层以外的层中存储信息。 这些层具有更高的居里温度，因为它们远离光源。 在使用上述记录介质的磁光再现方法中，以层的磁畴图案存储的信息被转移到更靠近光源的层。 为了在介质中记录信息，施加外部磁场，使得从具有最高居里温度的层顺序写入信息。

    Magneto-optic method and system for recording and retrieving high-density digital data
    84.
    发明公开
    Magneto-optic method and system for recording and retrieving high-density digital data 失效
    磁光方法和设备用于记录和再现高密度的数字数据。

    公开(公告)号：EP0437170A1

    公开(公告)日：1991-07-17

    申请号：EP90810017.5

    申请日：1990-01-09

    申请人： International Business Machines Corporation

    发明人： Allenspach, Rolf, Dr. ,  Bischof, Andreas

    IPC分类号： G11B11/10 ,  G11B11/12

    CPC分类号： G11B11/10543 ,  G11B11/10504 ,  G11B11/10515 ,  G11B11/10536 ,  G11B11/10584

    摘要： This magneto-optic method and apparatus for recording and retrieving high-density digital data employ the selective heating, beyond the Curie or compensation temperature T c of the record material, at individual storage locations of a magnetically ordered record layer (9) in the presence of an external magnetic field for recording information by rotating the direction of polarization at the affected record locations, and the selective detection of the state of rotation of the polarization direction at information storage locations in a recording medium (7) by way of analyzing the state of rotation of the light transmitted through said record material. The writing and retrieval of information are performed by means of a sharply pointed tip (5) placed at an essentially constant distance above the recording medium (7), the sharpness of the apex (6) of said tip (5) determining the resolution and, hence, the achievable storage density.
    The heating of the storage locations in the record layer (9) is accomplished by means of a laser beam (1, 2) directed onto the recording medium (7) through said slidably arranged tip (5). For detecting the state of rotation of the polarization direction at the individual storage locations, a laser beam (11) travelling inside a wave guide (12) arranged in juxtaposition with said recording medium (7), is coupled into said record layer (9). The light transmitted through the record layer (9) is analyzed by said tip (5) followed by a beam-splitting prism (3) which provides the s- and p-polarized components of the light.

    摘要翻译： 这个用于记录和检索高密度数字数据磁光方法和装置使用选择性加热，超出了记录材料的居里或补偿温度Tc，在存在一个磁有序记录层（9）的各个存储位置 到外部磁场通过在受影响的记录的位置旋转偏振方向记录信息，并通过分析的状态的方式，选择性地检测在一个记录介质（7）的信息的存储位置的偏振方向的旋转状态的 通过所述记录材料中的光反mitted的旋转。 的写入和检索信息执行通过的尖锐尖端装置（5）在以基本恒定的距离的记录介质上方放置（7），所述顶点的锐度（6）所述尖端（5）确定的采矿分辨率的和 ，因此，可达到的存储密度。 在记录层（9）的存储位置的加热是通过激光束来完成（1,2）引导到所述记录介质（7）通过所述可滑动地布置尖端（5）。 对于在各个存储位置检测的偏振方向的旋转的状态下，在并置布置成与所述记录介质的波导（12）的内部行进的激光束（11）（7）被耦合到所述记录层（9） ， （5）通过一个分束棱镜其次通过记录层（9）mitted的光反式通过所述尖端分析（3），其提供的光的s-和p-偏振分量。

    Magneto-optic recording medium and method of magneto-optic recording using the same medium
    85.
    发明公开
    Magneto-optic recording medium and method of magneto-optic recording using the same medium 失效
    磁光记录介质和使用相同介质的磁光记录方法

    公开(公告)号：EP0313334A3

    公开(公告)日：1990-08-01

    申请号：EP88309812.1

    申请日：1988-10-19

    申请人： Hitachi Maxell Ltd.

    发明人： Sakemoto, Akito ,  Shimazaki, Katsusuke ,  Tsuburaya, Yoshitane

    IPC分类号： G11B11/10 ,  G11B5/66 ,  G11B5/84

    CPC分类号： G11B11/10586 ,  G11B11/10504 ,  G11B13/00

    摘要： A magneto-optic recording medium and a method of magneto-optic recording are disclosed. The magneto-­optic recording medium comprises a multilayered recording film including a magneto-optic recording film (3) having a magnetically anisotropic characteristic in the vertical direction, formed on a transparent substrate (1), and a perpendicular magnetization film (4) formed on the magneto-optic recording film (3) with the coercive force thereof small at room temperature and the Curie point thereof sufficiently high. By use of this magneto-optic recording medium, a magnetic field with the direction thereof reversed in accordance with the level of the desired recording signal is applied to the perpendicular magnetiza­tion film (4) thereby to record the desired signal therein. The temperature of the magneto-optic recording film (3) is increased thereby to transfer the magnetization recording in the perpendicular magnetization film (4) to the magneto-optic recording film (3), thus recording the desired recording signal in the magneto-optic recording film (3).

    PHOTOMAGNETIC RECORDING METHOD
    87.
    发明公开
    PHOTOMAGNETIC RECORDING METHOD 失效
    照片AUFZEICHNUNGSVERFAHREN。

    公开(公告)号：EP0358775A1

    公开(公告)日：1990-03-21

    申请号：EP89902543.1

    申请日：1989-02-18

    申请人： Sony Corporation

    发明人： INOUE, Hideki

    IPC分类号： G11B11/10 ,  G11B5/02

    CPC分类号： G11B11/10504 ,  G11B11/10595

    摘要： This invention relates to a photomagnetic recording method for writing data into a photomagnetic medium by using a magnetic head whose magnetic field is modulated by a recording signal and an optical pickup. In accordance with the present invention, a first data pit group is first recorded on the photomagnetic recording medium with gaps greater than a predetermined data pit recording gap and then each data pit of a second data pit group is recorded between the adjacent data pits of the first data pit group. A photomagnetic recording apparatus according to the present invention can cope, by interleaving write method, with both the factors of frequency characteristics of the magnetic head and the thermal interference of adjacent pits that limit high density recording or high speed access, and can accomplish both high density recording and high speed access.

    摘要翻译： 本发明涉及一种通过使用其磁场被记录信号和光学拾取器调制的磁头将数据写入光磁介质的光磁记录方法。 根据本发明，第一数据凹坑组首先被记录在具有大于预定数据凹坑记录间隙的间隙的光磁记录介质上，然后将第二数据凹坑组的每个数据凹坑记录在 第一个数据坑组。 根据本发明的光磁记录装置可以通过交错写入方法来处理磁头的频率特性和限制高密度记录或高速访问的相邻凹坑的热干涉的两个因素，并且可以实现两者的高 密度记录和高速访问。

    Magneto-optical memory medium and apparatus for writing and reading information on and from the medium
    90.
    发明公开
    Magneto-optical memory medium and apparatus for writing and reading information on and from the medium 失效
    磁光记录介质和用于在介质上读写信息的装置

    公开(公告)号：EP0180459A3

    公开(公告)日：1987-08-12

    申请号：EP85307828

    申请日：1985-10-29

    申请人： BROTHER KOGYO KABUSHIKI KAISHA

    发明人： Taki, Kazunari Brother Kogyo K.K.

    IPC分类号： G11B13/04 ,  G11B11/10 ,  G11B07/08 ,  G11B07/12

    CPC分类号： G11B11/10504 ,  G11B11/10515 ,  G11B11/10532 ,  G11B11/10582

    摘要： A magneto-optical memory medium of a laminar structure comprising at least one non-magnetic layer, and a plurality of magneto-optical storage layers separeted from each other by corresponding one of the at least one non-magnetic layer, and wherein information is read out from a selected one of the storage layers by detecting a change in the Kerr rotation angle of corresponding one of light beams of different wavelengths applied to the memory medium which change depends upon magneto-optical anisotropy of the storage leyers. A thickness of one of the storage layers is determined so that the change in the Kerr rotation angle of each of the light beams represents the anisotropy of the corresponding storage layer, irrespective of the anisotropy of the other storage layers. Also disclosed is a magneto-optical apparatus for writing and/or reading information on or from the desired magneto-optical layers.