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49 条记录 (耗时 0.02 秒)

    Tracking servo setting method and apparatus
    21.
    发明授权
    Tracking servo setting method and apparatus 失效
    跟踪伺服设定方法和装置

    公开(公告)号：US4731771A

    公开(公告)日：1988-03-15

    申请号：US829024

    申请日：1986-02-13

    申请人： Takeshi Maeda ,  Kazuo Shigematsu ,  Shigeru Nakamura ,  Yoshito Tsunoda ,  Masuo Kasai

    发明人： Takeshi Maeda ,  Kazuo Shigematsu ,  Shigeru Nakamura ,  Yoshito Tsunoda ,  Masuo Kasai

    IPC分类号： G11B7/085 ,  G11B7/09

    CPC分类号： G11B7/08529 ,  G11B7/08517 ,  G11B7/0901

    摘要： This invention relates to a track setting method for a tracking servo system in an optical disk device and a device therefor. According to this invention the track passage velocity when the light spot moves across the track is detected and setting of the light spot onto the track is performed under the condition that the passage velocity thus detected is lower than a predetermined velocity. In the case where the passage velocity is greater than the predetermined velocity, the light spot is forced to move so that the passage velocity is lower than the predetermined velocity and the light spot is set up thereafter.

    摘要翻译： 本发明涉及一种用于光盘装置中的跟踪伺服系统的轨道设置方法及其装置。 根据本发明，检测到光点移动通过轨迹时的轨迹通过速度，并且在由此检测到的通过速度低于预定速度的条件下执行光点到轨道上的设置。 在通过速度大于预定速度的情况下，迫使光斑移动，使得通过速度低于预定速度，此后设定光斑。

    Optical information processor for compensating offset
    22.
    发明授权
    Optical information processor for compensating offset 失效
    用于补偿偏移的光学信息处理器

    公开(公告)号：US4663751A

    公开(公告)日：1987-05-05

    申请号：US515520

    申请日：1983-07-20

    申请人： Toshimitsu Kaku ,  Yoshito Tsunoda ,  Takeshi Maeda ,  Shigeru Nakamura

    发明人： Toshimitsu Kaku ,  Yoshito Tsunoda ,  Takeshi Maeda ,  Shigeru Nakamura

    IPC分类号： G11B7/007 ,  G11B7/09 ,  G11B7/095 ,  G11B7/24 ,  G11B27/30 ,  G11B21/10

    CPC分类号： G11B27/30 ,  G11B20/10203 ,  G11B7/00745 ,  G11B7/09 ,  G11B7/094 ,  G11B7/0956 ,  G11B2220/2537

    摘要： An optical information processor including a recording medium with a guide groove having interrupting portions therealong in the form of mirror areas for reflecting light impinging on the recording medium. A light detector is provided for receiving diffraction light from the guide groove with a first signal detector being provided for differentially operating on signals from the light detector and generating a tracking signal tracking the guide groove. Additionally, a second signal detector is provided for detecting the signal from the light detector indicative of the mirror areas and providing an output indicative thereof which is utilized for compensating the tracking signal. The compensated tracking signal is then utilized for controlling the positioning of the light beam on the recording medium.

    摘要翻译： 一种光学信息处理器，包括具有引导槽的记录介质，所述引导槽具有镜面区域形式的中断部分，用于反射入射到记录介质上的光。 提供了一种光检测器，用于接收来自引导槽的衍射光，第一信号检测器被提供用于对来自光检测器的信号进行差分操作，并产生跟踪引导槽的跟踪信号。 此外，提供第二信号检测器，用于检测来自光检测器的指示镜面积的信号，并提供用于补偿跟踪信号的指示的输出。 补偿的跟踪信号然后用于控制光束在记录介质上的定位。

    System for optically recording information
    24.
    发明授权
    System for optically recording information 失效
    用于光学记录信息的系统

    公开(公告)号：US4550394A

    公开(公告)日：1985-10-29

    申请号：US479894

    申请日：1983-03-29

    申请人： Takeshi Maeda ,  Masahiro Takasago ,  Yoshito Tsunoda

    发明人： Takeshi Maeda ,  Masahiro Takasago ,  Yoshito Tsunoda

    IPC分类号： G11B7/013 ,  G11B7/09 ,  G11B27/36 ,  G11B7/00 ,  G11B21/10

    CPC分类号： G11B7/24085 ,  G11B27/36 ,  G11B7/0903

    摘要： An optical information recording system in which predetermined information is recorded by a first laser light beam on a recording medium along a guiding groove previously formed in the recording medium. Second and third laser light beams are projected onto the recording medium at positions deviated from the center of the guiding groove and preceding and succeeding to the first laser beam. A pattern in which no mutual interference of information to be recorded by the first laser beam is present is detected from an information signal which modulates the intensity of the first laser light beam. A difference is determined between the quantity of light reflected upon illumination of the recorded pattern by the second laser beam chronographically succeeding to the first laser beam and the quantity of light reflected upon illumination by the third laser beam. The position of the first laser beam is controlled on the basis of the thus determined difference for effecting an information tracking operation with improved accuracy.

    摘要翻译： 一种光学信息记录系统，其中通过预先形成在记录介质中的导向槽，通过第一激光束将预定信息记录在记录介质上。 第二和第三激光束在与引导槽的中心偏离并在第一激光束之前和之后的位置处被投影到记录介质上。 从调制第一激光的强度的信息信号中检测不存在由第一激光束记录的信息的相互干扰的图案。 在通过第一激光束的时间计时的第二激光束照射记录图案反射的光量与由第三激光束照射反射的光量之间确定差异。 基于如此确定的差异来控制第一激光束的位置，以提高准确度进行信息跟踪操作。

    Driving apparatus for semiconductor laser
    25.
    发明授权
    Driving apparatus for semiconductor laser 失效
    半导体激光器驱动装置

    公开(公告)号：US4523089A

    公开(公告)日：1985-06-11

    申请号：US411809

    申请日：1982-08-26

    申请人： Takeshi Maeda ,  Yasumitsu Mizoguchi ,  Masahiro Takasago ,  Tokuya Kaneda ,  Yoshito Tsunoda

    发明人： Takeshi Maeda ,  Yasumitsu Mizoguchi ,  Masahiro Takasago ,  Tokuya Kaneda ,  Yoshito Tsunoda

    IPC分类号： G11B7/125 ,  H01S5/068 ,  H01S5/0683 ,  G01J1/32 ,  H01S3/10

    CPC分类号： H01S5/06835

    摘要： A driving circuit for driving a semiconductor laser by a driving signal containing a pulse signal representing given information and superposed on a DC bias signal includes means for monitoring intensity of laser light emitted when the DC bias is applied, and means for monitoring the intensity of laser light emitted when the pulse signal is applied. The DC bias signal and the pulse signal are varied in dependence on the result of comparisons between the outputs of the monitoring means and respective predetermined reference values.

    摘要翻译： 用于通过包含表示给定信息并叠加在DC偏置信号上的脉冲信号的驱动信号驱动半导体激光器的驱动电路包括用于监视施加DC偏压时发射的激光的强度的装置，以及用于监视激光强度的装置 当施加脉冲信号时发出光。 DC偏置信号和脉冲信号根据监视装置的输出与相应的预定参考值之间的比较结果而变化。

    Method of recording and reproduction of information using a recording medium available for information overlap recording, a recording medium and a recording and reproducing apparatus using the method
    26.
    发明授权
    Method of recording and reproduction of information using a recording medium available for information overlap recording, a recording medium and a recording and reproducing apparatus using the method 失效
    使用可用于信息重叠记录的记录介质，记录介质和使用该方法的记录和再现装置来记录和再现信息的方法

    公开(公告)号：US5218599A

    公开(公告)日：1993-06-08

    申请号：US412474

    申请日：1989-09-26

    申请人： Toshiaki Tsuyoshi ,  Yoshito Tsunoda ,  Hiromichi Fujisawa

    发明人： Toshiaki Tsuyoshi ,  Yoshito Tsunoda ,  Hiromichi Fujisawa

    IPC分类号： G11B11/10 ,  G11B7/00 ,  G11B7/004 ,  G11B7/005 ,  G11B7/007 ,  G11B7/24 ,  G11B7/30 ,  G11B11/105 ,  G11B13/00 ,  G11B13/04 ,  G11B20/12 ,  G11B27/32

    CPC分类号： G11B11/10584 ,  G11B11/10597 ,  G11B13/045 ,  G11B27/327 ,  G11B2020/1259 ,  G11B2220/211 ,  G11B2220/2525 ,  G11B7/0079

    摘要： A recording medium is provided with a recording film having opto-magnetic characteristics formed on the substrate, with first information being recorded in advance in the form of pit strings of a phase structure. Second information is recorded over the first information through the application of a magnetic field with polarities corresponding to the second information in the presence of the irradiation of a high-power radiation beam, without damaging the record of the first information. The first and second information are produced independently and simultaneously with a single spot in the same area by use of different signal reproduction mechanisms for the first information and second information. The first information (ROM information) is reproduced as the variation in the amount (intensity) of the reflected light from the opto-magnetic recording film, and the second information (RAM information) is reproduced by detecting the rotational angle of the reflected light, based on the Kerr effect, from the opto-magnetic film concurrently with the reproduction of the first information using a single spot.

    摘要翻译： 记录介质设置有具有形成在基板上的光磁特性的记录膜，其中预先以相位结构的凹坑串的形式记录第一信息。 在存在高功率辐射束的照射的情况下，通过施加具有与第二信息对应的极性的磁场，在第一信息上记录第二信息，而不损害第一信息的记录。 通过对于第一信息和第二信息使用不同的信号再现机制，第一和第二信息与同一区域中的单个点独立地同时产生。 第一信息（ROM信息）被再现为来自光电记录膜的反射光的量（强度）的变化，并且通过检测反射光的旋转角度再现第二信息（RAM信息） 基于克尔效应，从与使用单个点的第一信息的再现同时的光磁膜。