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257 条记录 (耗时 0.037 秒)

    Record carrier for a magneto-optical disc memory having guide grooves of a plurality of tracks disposed with a predetermined relation to light spot diameter
    4.
    发明授权
    Record carrier for a magneto-optical disc memory having guide grooves of a plurality of tracks disposed with a predetermined relation to light spot diameter 失效
    用于磁光盘存储器的记录载体，其具有以光点直径预定关系设置的多个轨道的引导槽

    公开(公告)号：US4985881A

    公开(公告)日：1991-01-15

    申请号：US53564

    申请日：1987-05-21

    申请人： Atsushi Saito ,  Masahiro Ojima ,  Masaru Ito

    发明人： Atsushi Saito ,  Masahiro Ojima ,  Masaru Ito

    IPC分类号： G11B7/004 ,  G11B7/007 ,  G11B7/013 ,  G11B7/09 ,  G11B7/26 ,  G11B11/105 ,  G11B13/04

    CPC分类号： G11B7/261 ,  G11B11/10565 ,  G11B11/10578 ,  G11B13/04 ,  G11B13/045 ,  G11B7/00745 ,  G11B7/0938 ,  G11B7/24076 ,  G11B7/24079 ,  G11B7/24085

    摘要： A record carrier for recording, reproducing and erasing information. A circular disc-like substrate has a recording layer thereon such that information is written onto the recording layer by changing the direction of magnetization. A guide groove of a plurality of tracks is formed in advance and extends in the radial direction with flat portions therebetween. Each flat portion between the tracks of the guide groove is divided into a plurality of sectors, each of which includes a header portion in which a header signal containing an address for distinguishing at least a respective sector is formed in advance with pits of a phase structure and a data portion adjacent to the header portion. The guide groove serves as an optical guide for a light beam which records, reproduces and erases information onto the data portion.

    摘要翻译： 用于记录，再现和擦除信息的记录载体。 圆盘状基板上具有记录层，通过改变磁化方向将信息写入记录层。 预先形成多个轨道的引导槽，并且在其间具有平坦部分沿径向方向延伸。 引导槽的轨道之间的每个平坦部分被划分成多个扇区，每个扇区包括一个报头部分，其中包含用于区分至少相应扇区的地址的报头信号预先与相位结构的凹坑形成 以及与头部相邻的数据部分。 引导槽用作光束的光导，其将信息记录，再现和擦除到数据部分上。

    Method and apparatus for thermo magnetic recording/erasing information with preselected magnetic field switching
    5.
    发明授权
    Method and apparatus for thermo magnetic recording/erasing information with preselected magnetic field switching 失效
    用于预选磁场切换的热磁记录/擦除信息的方法和装置

    公开(公告)号：US4712203A

    公开(公告)日：1987-12-08

    申请号：US743974

    申请日：1985-06-12

    申请人： Atsushi Saito ,  Masahiro Ojima ,  Takeshi Maeda ,  Tsuyoshi Kato

    发明人： Atsushi Saito ,  Masahiro Ojima ,  Takeshi Maeda ,  Tsuyoshi Kato

    IPC分类号： G11B5/02 ,  G11B11/10 ,  G11B11/105 ,  G11B13/04 ,  G11B19/02 ,  G11B11/14 ,  G11B5/024

    CPC分类号： G11B11/10595 ,  G11B11/10506 ,  G11B11/10517 ,  G11B11/1056 ,  G11B13/045 ,  G11B19/02

    摘要： Method and apparatus for processing information on a recording member having a recording film capable of recording and erasing information in accordance with the change of a magnetizing direction, by utilizing a light induced thermo-magnetic effect, in which before the intensity of the laser light is switched at the high level eliminating the magnetization of the recording film in order to effect the recording and erasing operations by focusing the laser light on the recording film as a light spot, a magnetic field with the predetermined direction according to the recording and erasing operations is previously applied on the recording film, whereby the recording and erasing operations of the magnetized information can be effected with high speed and stably by applying the normal magnetic field in the direction according to the recording and erasing operations respectively.

    摘要翻译： 用于在具有能够根据磁化方向的变化记录和擦除信息的记录膜的记录部件上的信息处理信息的方法和装置，通过利用光诱导的热磁效应，其中在激光强度为 切换到高电平消除了记录膜的磁化，以通过将激光聚焦在记录膜上作为光点来实现记录和擦除操作，根据记录和擦除操作具有预定方向的磁场是 先前施加在记录膜上，由此通过分别根据记录和擦除操作沿方向施加正常磁场，可以高速且稳定地进行磁化信息的记录和擦除操作。

    Magneto-optical disc memory apparatus including a header signal and magneto-optical signal level adjusting circuit
    6.
    发明授权
    Magneto-optical disc memory apparatus including a header signal and magneto-optical signal level adjusting circuit 失效
    磁光盘存储装置，包括标题信号和磁光信号电平调整电路

    公开(公告)号：US5161135A

    公开(公告)日：1992-11-03

    申请号：US617006

    申请日：1990-11-21

    申请人： Atsushi Saito ,  Masahiro Ojima ,  Masaru Ito

    发明人： Atsushi Saito ,  Masahiro Ojima ,  Masaru Ito

    IPC分类号： G11B7/004 ,  G11B7/007 ,  G11B7/013 ,  G11B7/09 ,  G11B7/26 ,  G11B11/105 ,  G11B13/04

    CPC分类号： G11B7/261 ,  G11B11/10565 ,  G11B11/10578 ,  G11B13/04 ,  G11B13/045 ,  G11B7/00745 ,  G11B7/0938 ,  G11B7/24076 ,  G11B7/24079 ,  G11B7/24085

    摘要： A record carrier for recording, reproducing and erasing information. A circular disc-like substrate has a recording layer thereon such that information is written onto the recording layer by changing the direction of magnetization. A guide groove of a plurality of tracks is formed in advance and extends in the radial direction with intervals therebetween. Each track of the guide groove is divided into a plurality of sectors, each of which includes a header portion in which a header signal containing an address for distinguishing at least said sector is formed in advance with pits of a phase structure and a data portion adjacent to said header portion. The guide groove serves as an optical guide for a light beam which records, reproduces and erases information onto the data portion. A first detection system for detecting the light intensity of the reflected light from the record carrier and a second detection system for detecting the direction of polarization of the reflected light from the record carrier, and a level adjustment circuit for adjusting the levels of the header signal detected by the first detection system and the data signal detected by the second detection system are incorporated in this apparatus, whereby recording, reproducing and erasing information of any number of sectors are enabled.

    摘要翻译： 用于记录，再现和擦除信息的记录载体。 圆盘状基板上具有记录层，通过改变磁化方向将信息写入记录层。 预先形成多个轨道的引导槽，并且在径向方向上间隔地延伸。 引导槽的每个轨道被分成多个扇区，每个扇区包括一个报头部分，其中包含用于区分至少所述扇区的地址的报头信号预先由相位结构的凹点和相邻的数据部分形成 到所述头部。 引导槽用作光束的光导，其将信息记录，再现和擦除到数据部分上。 用于检测来自记录载体的反射光的光强度的第一检测系统和用于检测来自记录载体的反射光的偏振方向的第二检测系统，以及用于调整标题信号的电平的电平调节电路 由第一检测系统检测到的和由第二检测系统检测的数据信号被并入该装置中，由此启用任何数量的扇区的记录，再现和擦除信息。

    Optical information recording apparatus
    7.
    发明授权
    Optical information recording apparatus 失效
    光信息记录装置

    公开(公告)号：US4894816A

    公开(公告)日：1990-01-16

    申请号：US152803

    申请日：1988-02-05

    申请人： Hirofumi Sukeda ,  Masahiro Ojima ,  Atsushi Saito

    发明人： Hirofumi Sukeda ,  Masahiro Ojima ,  Atsushi Saito

    IPC分类号： G11B7/00 ,  G11B7/0045 ,  G11B7/013 ,  G11B7/125 ,  G11B11/105

    CPC分类号： G11B7/126 ,  G11B11/1053 ,  G11B7/00456 ,  G11B7/24085

    摘要： An optical information recording apparatus, in which marks having a desired shape are recorded at desired positions, independently of the patterns of recording pulses, while canceling influences of the heat conduction from the mark, which has been directly previously recorded, by controlling the energy at the front end portion of laser light pulses, depending on the interval from the directly preceding pulse, when recording medium is irradiated with the laser light pulses corresponding to recording pulses so as to record information.

    摘要翻译： 一种光学信息记录装置，其中具有期望形状的标记与记录脉冲的图案无关地记录在期望的位置，同时通过控制以前记录的能量来消除来自已经直接预先记录的标记的热传导的影响 当记录介质用对应于记录脉冲的激光脉冲照射以记录信息时，激光脉冲的前端部分取决于从前一个脉冲的间隔。

    Optical head with improved extinction ratio for magneto-optical memory
    8.
    发明授权
    Optical head with improved extinction ratio for magneto-optical memory 失效
    具有改善的光磁记忆消光比的光头

    公开(公告)号：US4672593A

    公开(公告)日：1987-06-09

    申请号：US750476

    申请日：1985-07-01

    申请人： Masahiro Ojima ,  Atsushi Saito ,  Tsuyoshi Kato

    发明人： Masahiro Ojima ,  Atsushi Saito ,  Tsuyoshi Kato

    IPC分类号： G11B11/105 ,  G11B11/00 ,  G11B7/00

    CPC分类号： G11B11/10532

    摘要： An optical head for a magneto-optical memory in which the major axis (the phase advance axis or phase lag axis) of optical anisotropy of a lens focusing a linearly polarized laser beam onto a magneto-optical recording medium is arranged to coincide with the direction of linear polarization of the laser beam incident upon the lens, thereby improving the extinction ratio.

    摘要翻译： 一种用于磁光存储器的光学头，其中将线偏振激光束聚焦到磁光记录介质上的透镜的光学各向异性的长轴（相位前进轴或相位延迟轴）布置成与方向 入射到透镜上的激光束的线偏振，从而提高消光比。

    Information recording method and optical disk apparatus using same
    10.
    发明授权
    Information recording method and optical disk apparatus using same 失效
    信息记录方法和使用其的光盘装置

    公开(公告)号：US5333126A

    公开(公告)日：1994-07-26

    申请号：US16897

    申请日：1993-02-12

    申请人： Yasushi Fukuda ,  Hiroshi Ide ,  Atsushi Saito ,  Takeshi Maeda ,  Fumiyoshi Kirino ,  Tsuyoshi Toda

    发明人： Yasushi Fukuda ,  Hiroshi Ide ,  Atsushi Saito ,  Takeshi Maeda ,  Fumiyoshi Kirino ,  Tsuyoshi Toda

    IPC分类号： G11B7/0045 ,  G11B20/12 ,  G11B20/14 ,  G11B27/30 ,  G11B5/76 ,  G11B5/09

    CPC分类号： G11B20/1217 ,  G11B20/1426 ,  G11B27/3027 ,  G11B7/0045 ,  G11B2220/20

    摘要： When record marks are recorded on a recording medium while making a code symbol "1" of data by obtained coding write information according to a coding system having no DC free property correspond to every edge of the record marks, the recording is effected while inserting resynchronizing signals into the write information with a constant interval. For the resynchronizing signal either one selected between a first resynchronizing code pattern, in which the number of symbols "1" contained therein is even, and a second resynchronizing code pattern, in which the number of symbols "1" is odd, so that an accumulated charge obtained from the run length of the coded data approaches zero is used. Each of the first and the second resynchronizing code pattern contains at least a specified pattern, which doesn't meet the coding rule. The selection is effected by adding a run length switching code to the resynchronizing signal and by switching it to "0" or "1" depending on an output of a run length measuring circuit and a run length judging circuit. In this way it is possible to suppress fluctuations in the level of a reproduced signal obtained from the record marks recorded on the recording medium and to realize a stable data detection by using the original waveform detection method, by which the reproduced signal is converted into a binary signal by using a suitable slice level.

    摘要翻译： 当记录标记被记录在记录介质上时，通过根据不具有直流自由特性的编码系统获得的编码写入信息，使数据的代码符号“1”对应于记录标记的每个边缘，记录是在插入再同步 以恒定的间隔将信号写入信息。 对于再同步信号，其中在其中包含在其中的符号“1”的数量为偶数的第一重新同步码模式和符号“1”的数量为奇数的第二再同步码模式之间选择，使得 使用从编码数据的游程长度获得的累积电荷接近零。 第一和第二再同步代码模式中的每一个至少包含指定的模式，其不符合编码规则。 通过将游程长度切换码添加到重新同步信号并根据游程长度测量电路和游程长度判断电路的输出将其切换为“0”或“1”来进行选择。 以这种方式，可以抑制从记录在记录介质上的记录标记获得的再现信号的电平的波动，并且通过使用原始波形检测方法来实现稳定的数据检测，通过该原始波形检测方法将再现信号转换成 二进制信号通过使用合适的限幅电平。