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107 条记录 (耗时 0.034 秒)

    Optical recording and reproducing device
    5.
    发明授权
    Optical recording and reproducing device 失效
    光学记录和再现设备

    公开(公告)号：US4811328A

    公开(公告)日：1989-03-07

    申请号：US803611

    申请日：1985-12-02

    申请人： Tetsuo Ito ,  Hiroshi Sasaki ,  Yoshio Sato ,  Satoshi Shimada ,  Norifumi Miyamoto ,  Nobuyoshi Tsuboi ,  Hideki Nihei ,  Hiroaki Koyanagi

    发明人： Tetsuo Ito ,  Hiroshi Sasaki ,  Yoshio Sato ,  Satoshi Shimada ,  Norifumi Miyamoto ,  Nobuyoshi Tsuboi ,  Hideki Nihei ,  Hiroaki Koyanagi

    IPC分类号： G11B7/00 ,  G11B7/0055 ,  G11B7/125 ,  G11B7/135 ,  G11B7/30

    CPC分类号： G11B7/1395

    摘要： A laser light flux is divided and synthesized so that its light intensity distribution is changed from a Gaussian distribution to a non-Gaussian distribution. When a laser light flux having a Gaussian distribution is irradiated onto a dividing prism, it is divided into a left part and a right part which are refracted right and left inversely from each other. When the right and left parts are incident on a synthesizing prism, they are refracted again and travel to be overlapped with each other on a recording medium. The light intensity distribution on a segment at the apex of the synthesizing prism is weaker at the central part and stronger at the peripheral part. This is because the light fluxes resulting from the division are inverted in their position so that the central part of the Gaussian distribution is separated left and right while the peripheral part with a weaker light intensity is centered.

    摘要翻译： 激光光束被分割和合成，使其光强分布从高斯分布变为非高斯分布。 当具有高斯分布的激光束被照射到分割棱镜上时，它被分成左右折射，左右折射。 当左右部分入射到合成棱镜上时，它们被再次折射并在记录介质上相互重叠。 合成棱镜顶点的光束强度分布在中心部分较弱，周边部分强度分布较强。 这是因为由分割产生的光束在其位置反转，使得高斯分布的中心部分左右分离，而具有较弱光强度的周边部分居中。

    Optical head with optical beam control using acoustic wave device
    6.
    发明授权
    Optical head with optical beam control using acoustic wave device 失效
    光头用光束控制使用声波装置

    公开(公告)号：US4862440A

    公开(公告)日：1989-08-29

    申请号：US098969

    申请日：1987-09-09

    申请人： Norifumi Miyamoto ,  Yoshio Sato ,  Nobuyoshi Tsuboi ,  Satoshi Shimada ,  Hiroshi Sasaki ,  Hiroaki Koyanagi ,  Hiroyuki Minemura

    发明人： Norifumi Miyamoto ,  Yoshio Sato ,  Nobuyoshi Tsuboi ,  Satoshi Shimada ,  Hiroshi Sasaki ,  Hiroaki Koyanagi ,  Hiroyuki Minemura

    IPC分类号： G11B7/08 ,  G11B7/085 ,  G11B7/09

    CPC分类号： G11B7/08547 ,  G11B7/1245 ,  G11B7/1369 ,  G11B7/0912

    摘要： An optical head is disclosed, in which a plate-shaped optical wave guide comprises an optical system including a collimator lens, a beam splitter and an objective lens; a laser light source for emitting a laser light in the form of a light beam which is to be impinged on an optical recording medium; and electro-acoustic transducers are disposed between the beam splitter and the objective lens, the transducers being adapted to be driven by the outer electrical signal for producing surface acoustic waves in the optical wave guide, thereby establishing a condensation and rarefaction distribution in refractive index in the optical wave guide which distribution influences the direction of transmission and the degree of focusing of the light beam passing therethrough so that regulation of the tracking and the focal length can be effected without any mechanical movements.

    摘要翻译： 公开了一种光学头，其中板状光波导包括包括准直透镜，分束器和物镜的光学系统; 用于发射将要照射在光学记录介质上的光束形式的激光的激光源; 并且电声换能器设置在分束器和物镜之间，换能器适于由外部电信号驱动，以在光波导中产生表面声波，由此在折射率中建立冷凝和稀疏分布 分布影响透射方向的光波导和通过其的光束的聚焦程度，从而可以在没有任何机械运动的情况下实现跟踪调节和焦距。

    Optical recording method and apparatus using two fight spots
    7.
    发明授权
    Optical recording method and apparatus using two fight spots 失效
    光记录方法和装置使用两个战斗点

    公开(公告)号：US4841514A

    公开(公告)日：1989-06-20

    申请号：US919421

    申请日：1986-10-16

    申请人： Nobuyoshi Tsuboi ,  Atsumi Watanabe ,  Yoshio Sato ,  Satoshi Shimada ,  Hiroshi Sasaki

    发明人： Nobuyoshi Tsuboi ,  Atsumi Watanabe ,  Yoshio Sato ,  Satoshi Shimada ,  Hiroshi Sasaki

    IPC分类号： G11B7/00 ,  G11B7/0045 ,  G11B7/0055 ,  G11B7/006 ,  G11B7/125 ,  G11B7/135 ,  G11B7/30

    CPC分类号： G11B7/006 ,  G11B7/125

    摘要： A light spot determining a first condition that an optical recording medium is cooled after being heated to a temperature exceeding a first temperature and a light spot determining a second condition that the optical recording medium is cooled after being heated to a temperature exceeding a second temperature higher than the room temperature and not exceeding the first temperature higher than the second temperature, namely, the two light spots are radiated onto the optical recording medium and in the same guide track thereof wherein signals are recorded and erased on the optical recording medium by controlling the spot diameter of each light spot and/or the light intensity thereof.

    摘要翻译： 确定光学记录介质在被加热到超过第一温度的温度后被冷却的第一条件的光点和确定光学记录介质在被加热到超过第二温度的温度之后被冷却的第二条件的光点 比室温高并且不超过高于第二温度的第一温度，即，两个光点被辐射到光记录介质上，并且在相同的导轨中，其中通过控制光记录介质在光记录介质上记录和擦除信号 每个光点的光斑直径和/或其光强度。

    Signal processing apparatus for disc memory devices
    9.
    发明授权
    Signal processing apparatus for disc memory devices 失效
    光盘存储装置的信号处理装置

    公开(公告)号：US4764913A

    公开(公告)日：1988-08-16

    申请号：US942713

    申请日：1986-12-17

    申请人： Hiroshi Sasaki ,  Tomio Chiba ,  Mitsuyasu Kido ,  Yoshio Sato ,  Atsumi Watanabe

    发明人： Hiroshi Sasaki ,  Tomio Chiba ,  Mitsuyasu Kido ,  Yoshio Sato ,  Atsumi Watanabe

    IPC分类号： G11B5/012 ,  G11B7/013 ,  G11B20/10

    CPC分类号： G11B7/24085 ,  G11B20/10 ,  G11B5/012

    摘要： A disc is provided with the equal-interval pits along tracks, at which digital signals are recorded bit by bit. Such a disc is rotated at the constant angular velocity. A signal processing apparatus according to the present invention detects the linear velocity of the track which is at present followed by a pickup. The filtering of a source signal to be recorded and the analog-to-digital conversion of the filtered signal, in the signal processing for recording, are controlled and timed in accordance with the detected linear velocity. Further, the digital-to-analog conversion of a signal read out from the disc and the filtering of the converted signal, in the signal processing for reproducing, are also timed and controlled in response to the detected linear velocity. Thereby, a disc memory device having the large storage capacity and suited for the random access memory can be realized.

    摘要翻译： 光盘上设有沿轨道的等间隔凹坑，数字信号逐位记录。 这样的盘以恒定的角速度旋转。 根据本发明的信号处理设备检测当前跟踪拾取的轨道的线速度。 在记录的信号处理中对要记录的源信号的滤波和滤波信号的模数转换根据检测到的线速度被控制和定时。 此外，在用于再现的信号处理中，从盘读出的信号的数模转换和转换的信号的滤波也响应于检测到的线速度而被定时和控制。 因此，可以实现具有大存储容量并且适合随机存取存储器的盘存储器件。