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15 条记录 (耗时 0.03 秒)

    Optical recording and reproducing device
    3.
    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
    5.
    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。

    Method and apparatus of optical modulation using superconductive oxide material
    8.
    发明授权
    Method and apparatus of optical modulation using superconductive oxide material 失效
    使用超导氧化物材料进行光学调制的方法和装置

    公开(公告)号：US5110792A

    公开(公告)日：1992-05-05

    申请号：US431231

    申请日：1989-11-03

    申请人： Takahiro Nakayama ,  Kunihiro Tamahashi ,  Moriaki Fuyama ,  Hiroyuki Minemura ,  Yoshio Sato ,  Nobuyoshi Tsuboi ,  Hiroaki Koyanagi

    发明人： Takahiro Nakayama ,  Kunihiro Tamahashi ,  Moriaki Fuyama ,  Hiroyuki Minemura ,  Yoshio Sato ,  Nobuyoshi Tsuboi ,  Hiroaki Koyanagi

    IPC分类号： G02F1/01

    CPC分类号： G02F1/01 ,  Y10S505/702 ,  Y10S505/828 ,  Y10S505/848

    摘要： An optical modulation method and apparatus uses superconductive oxide material for the optical modulation element. The current, magnetic field, temperature or pressure applied to the superconductive oxide material is varied so as to induce a superconduction-normalconduction transition, and the resulting variation in optical characteristics such as the reflectivity, transmissivity or refractive index of the superconductive oxide material modulate the input light. The method and apparatus are fast in operation and simple in structure. The method and apparatus also detect the variation in the current, magnetic field, temperature or pressure as a change in the reflectivity, transmissivity or refractive index of the superconductive oxide material on the basis of a superconduction-normalconduction transition.

    摘要翻译： 光调制方法和装置使用超导氧化物材料作为光调制元件。 改变施加到超导氧化物材料的电流，磁场，温度或压力，以便引起超导 - 正常的导电转变，并且由此导致的超导氧化物材料的光学特性如反射率，透射率或折射率的变化调制 输入光。 该方法和装置操作简单，结构简单。 该方法和装置还根据超导 - 正常的导电转变，检测电流，磁场，温度或压力的变化，作为超导氧化物材料的反射率，透射率或折射率的变化。