利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

35 条记录 (耗时 0.034 秒)

    Recording and reproduction device for a magneto-optic recording medium capable of recording information according to optical super-resolution
    4.
    发明授权
    Recording and reproduction device for a magneto-optic recording medium capable of recording information according to optical super-resolution 失效
    能够根据光学超分辨率记录信息的磁光记录介质的记录和再现装置

    公开(公告)号：US06243326B1

    公开(公告)日：2001-06-05

    申请号：US09101800

    申请日：1998-10-19

    申请人： Satoshi Sumi ,  Yoshihisa Suzuki ,  Atsushi Yamaguchi ,  Kenji Tanase ,  Yoshiharu Uchihara ,  Kenji Torazawa ,  Seiji Murata

    发明人： Satoshi Sumi ,  Yoshihisa Suzuki ,  Atsushi Yamaguchi ,  Kenji Tanase ,  Yoshiharu Uchihara ,  Kenji Torazawa ,  Seiji Murata

    IPC分类号： G11B1100

    CPC分类号： G11B11/1051 ,  G11B11/10508 ,  G11B11/10515 ,  G11B11/10543 ,  G11B11/10586

    摘要： A magneto-optic disk and a recording/reproduction device therefor adopt optical super-resolution to increase recording capacity. More specifically, the magneto-optic disk has an heat emitting layer (6) on a recording layer (4) and still preferably has an intermediate layer (8) between a reproduction layer (3) and the recording layer (4). The recording/reproduction device includes a circuit (33) for pulsing a laser beam to be radiated to the magneto-optic disk and still preferably includes a polarization rotating unit (50) and a polarizing filter (51) for blocking only the center of the laser beam in reproduction. The heat emitting layer (6) diffusing any heat generated by the laser beam, and the discontinuously radiated laser beam allow small recording domain. The laser beam having its center blocked forms smaller main lobe due to diffraction effect.

    摘要翻译： 磁光盘及其记录/再现装置采用光学超分辨率来增加记录容量。 更具体地，磁光盘在记录层（4）上具有发热层（6），并且还优选地在再现层（3）和记录层（4）之间具有中间层（8）。 记录/再现装置包括用于脉冲激光束以辐射到磁光盘的电路（33），并且还优选地包括偏振旋转单元（50）和偏振滤光器（51），用于仅阻挡 激光束在再现。 发热层（6）扩散由激光束产生的热量，不连续辐射的激光束允许小的记录域。 具有中心阻挡的激光束由于衍射效应而形成较小的主瓣。

    Magneto-optical recording medium and manufacturing method thereof
    5.
    发明授权
    Magneto-optical recording medium and manufacturing method thereof 失效
    磁光记录介质及其制造方法

    公开(公告)号：US5968678A

    公开(公告)日：1999-10-19

    申请号：US689149

    申请日：1996-07-30

    申请人： Kenji Tanase ,  Atsushi Yamaguchi ,  Yoshihisa Suzuki ,  Satoshi Sumi ,  Yoshiharu Uchihara ,  Seiji Murata ,  Kenji Torasawa

    发明人： Kenji Tanase ,  Atsushi Yamaguchi ,  Yoshihisa Suzuki ,  Satoshi Sumi ,  Yoshiharu Uchihara ,  Seiji Murata ,  Kenji Torasawa

    IPC分类号： G11B11/105 ,  G11B5/66

    CPC分类号： G11B11/1051 ,  G11B11/10506 ,  G11B11/10515 ,  G11B11/10586 ,  G11B11/10595 ,  Y10S428/90

    摘要： In magneto-optical recording medium, on a transparent substrate of polycarbonate resin, an SiN film having the thickness of 600 to 800 .ANG. and surface roughness Rmax of at most 10 nm is formed. On the SiN film, a GdFeCo reading layer having the thickness of 800 to 1200 .ANG. with Gd content of 30 to 36 at. % and Co content of 12 to 50 at. % is formed. On the reading layer, a TbFeCo recording layer of which Co content is 10 to 16 at. % is formed. The recording layer is a perpendicular magnetization film, and the reading layer is an in-plane magnetization film. At the time of reading, the reading and recording layers are heated, and the direction of magnetization of the recording layer is transferred to the reading layer only in the prescribed heated area. Information can be read only from the transferred portion, and thus a super resolution effect is obtained. When Kerr rotation angle .theta..sub.K is measured for the light reflected from the reading layer while the temperatures of the reading and recording layers are elevated, .theta..sub.K is approximately in proportion to Cth power of the elevated temperature t, wherein C is at least 8.0.

    摘要翻译： 在磁光记录介质中，在聚碳酸酯树脂的透明基板上形成厚度为600〜800的SiN膜，表面粗糙度Rmax为10nm以下。 在SiN膜上，具有800〜1200厚度的GdFeCo读取层，Gd含量为30〜36at。 ％，Co含量为12〜50。 ％ 形成了。 在读取层上，Co含量为10〜16at的TbFeCo记录层。 ％ 形成了。 记录层是垂直磁化膜，读取层是面内磁化膜。 在读取时，读取和记录层被加热，并且仅在规定的加热区域中记录层的磁化方向被转移到读取层。 信息只能从传送部分读取，从而获得超分辨率效果。 当读取层和记录层的温度升高时，对于从读取层反射的光测量克尔旋转角θK时，θK与升高温度t的Cth功率大致成比例，其中C至少为8.0。

    Information recording/reproducing apparatus to record/reproduce information on a recording medium recorded with an address mark
    7.
    发明授权
    Information recording/reproducing apparatus to record/reproduce information on a recording medium recorded with an address mark 有权
    用于在记录有地址标记的记录介质上记录/再现信息的信息记录/再现装置

    公开(公告)号：US06400653B1

    公开(公告)日：2002-06-04

    申请号：US09355831

    申请日：1999-08-05

    申请人： Kenji Torazawa ,  Kenji Asano ,  Satoshi Sumi ,  Yoshiharu Uchihara ,  Noboru Mamiya ,  Toshiaki Hioki

    发明人： Kenji Torazawa ,  Kenji Asano ,  Satoshi Sumi ,  Yoshiharu Uchihara ,  Noboru Mamiya ,  Toshiaki Hioki

    IPC分类号： G11B1100

    CPC分类号： G11B11/10584 ,  G11B7/0045 ,  G11B7/005 ,  G11B7/00718 ,  G11B7/00745 ,  G11B11/10513 ,  G11B11/10515 ,  G11B11/10565 ,  G11B11/10578 ,  G11B11/10595 ,  G11B27/19 ,  G11B27/24 ,  G11B27/3027 ,  G11B2220/2525

    摘要： An magneto-optical disc recording/reproducing apparatus includes an optical head (36) to detect a wobble (46) and an address mark (81 to 84) in an magneto-optical disc (31) and output a wobble signal (WB1, WB2) and an address mark signal (AML, AMG), a PLL circuit (47) to generate a clock signal (CK) in response to wobble signal (WB1), an address mark synchronous signal generation circuit (46) to generate an address mark synchronous signal (AM) in response to address mark signal (AML, AMG), a synchronizing circuit (48) to synchronize clock signal (CK) with address mark synchronous signal (AM) and generate a synchronized clock signal (SCK), and a timing setting circuit (49) to generate a timing pulse signal (TG1) to control a magnetic head driving circuit (34) and a timing pulse signal (TG2) to control a laser driving circuit (35). The recording/reproducing apparatus can detect a address mark (81 to 84), record la data signal on magneto-optical disc (31) in synchronization with the detected address mark, and reproduce a data signal from magneto-optical disc (31) in synchronization with the detected address mark, so that the data signal can be surely recorded/reproduced.

    摘要翻译： 磁光盘记录/重放装置包括一个用于检测磁光盘（31）中的摆动（46）和地址标记（81至84）的光头（36），并输出摆动信号（WB1，WB2 ）和地址标记信号（AML，AMG），PLL电路（47），用于响应于摆动信号（WB1）产生时钟信号（CK），地址标记同步信号产生电路（46）产生地址标记 响应于地址标记信号（AML，AMG）的同步信号（AM），同步电路（48），用于将时钟信号（CK）与地址标记同步信号（AM）同步并产生同步时钟信号（SCK），以及 定时设定电路（49），生成用于控制磁头驱动电路（34）的定时脉冲信号（TG1）和定时脉冲信号（TG2），以控制激光驱动电路（35）。 记录/再现装置可以检测地址标记（81至84），与检测到的地址标记同步地在磁光盘（31）上记录数据信号，并且从磁光盘（31）再现数据信号 与检测到的地址标记进行同步，从而可以可靠地记录/再现数据信号。

    Optical pickup device having compatibility with tracking system, and optical disk recording/reproduction apparatus using the same
    10.
    发明授权
    Optical pickup device having compatibility with tracking system, and optical disk recording/reproduction apparatus using the same 失效
    具有与跟踪系统兼容的光学拾取装置，以及使用其的光盘记录/再现装置

    公开(公告)号：US06385158B1

    公开(公告)日：2002-05-07

    申请号：US09168880

    申请日：1998-10-09

    申请人： Naoyuki Takagi ,  Satoshi Sumi

    发明人： Naoyuki Takagi ,  Satoshi Sumi

    IPC分类号： G11B700

    CPC分类号： G11B7/1369 ,  G11B7/0903 ,  G11B7/0906 ,  G11B7/0943 ,  G11B7/1275 ,  G11B7/131 ,  G11B7/1353 ,  G11B11/10543 ,  G11B11/10576 ,  G11B11/10597 ,  G11B2007/0006

    摘要： An optical pickup device for an AS-MO disk, a DVD and a CD includes a dual wavelength semiconductor laser with first and second oscillation devices, a polarization plane rotary unit selectively rotating a plane of polarization of a laser beam 90°, and a polarization selective diffraction grating passing a laser beam straight forward or dividing a laser beam into three beams depending upon the direction of polarization. The optical pickup device operates by the DPP tracking system where three laser beams are directed for an AS-MO disk, and by the DPD tracking system where a single laser beam is directed for a DVD or a CD. As a result, a signal can be reproduced from an AS-MO disk, a DVD, or a CD having different tracking systems.

    摘要翻译： 用于AS-MO盘，DVD和CD的光学拾取装置包括具有第一和第二振荡装置的双波长半导体激光器，选择性地将激光束的偏振面旋转90°的偏振面旋转单元和偏振 选择性衍射光栅将激光束直接向前传播或根据偏振方向将激光束分成三束。 光学拾取装置由DPP跟踪系统操作，其中三个激光束被引导用于AS-MO盘，以及DPD跟踪系统，其中单个激光束被定向用于DVD或CD。 结果，可以从具有不同跟踪系统的AS-MO盘，DVD或CD再现信号。