Liquid crystal optical valve controlled by photoconducting effect
    2.
    发明授权
    Liquid crystal optical valve controlled by photoconducting effect 失效
    液晶光阀由光导效应控制

    公开(公告)号:US4483592A

    公开(公告)日:1984-11-20

    申请号:US367014

    申请日:1982-04-09

    IPC分类号: H01J29/38 G02F1/135 G02F1/13

    CPC分类号: G02F1/135

    摘要: A display device is provided using a liquid crystal layer associated with a photoconducting plate, in which the voltage applied to the valve is an AC voltage chosen so as to transfer to the liquid crystal a maximum signal, and that applies more especially to radioscopy and to the projection of coherent (laser reading) or incoherent images.

    摘要翻译: 使用与光导板相关联的液晶层提供显示装置,其中施加到阀的电压是选择的AC电压以便将液晶转移到最大信号,并且更特别地适用于放射检查,并且 相干(激光读取)或非相干图像的投影。

    Optical system for observation in real time with scanning
    4.
    发明授权
    Optical system for observation in real time with scanning 失效
    用于实时扫描的光学系统

    公开(公告)号:US4442455A

    公开(公告)日:1984-04-10

    申请号:US260784

    申请日:1981-05-05

    摘要: An optical observation system in accordance with the invention comprises illumination means by scanning the object and means for detecting the radiation diffracted by the object. It also comprises an interaction medium in which the wave emerging from the object interferes with a pumping wave in order to induce in it a system of layers diffracting in real time a replica of the object wave propagating in the direction of said wave and a complex conjugate wave propagating in the opposite direction. These waves, which are isomorphic of the object wave help to improve the detection of the object.

    摘要翻译: 根据本发明的光学观察系统包括通过扫描对象的照明装置和用于检测被物体衍射的辐射的装置。 它还包括一种相互作用介质,其中从物体出射的波干扰泵浦波,以便在其中引入一层实时衍射的物体波在所述波方向上传播的复制品和复共轭 波在相反方向传播。 这些与对象波同构的波有助于改善对象的检测。

    Device for evolutive illumination of an object
    5.
    发明授权
    Device for evolutive illumination of an object 失效
    物体的演化照明装置

    公开(公告)号:US4527132A

    公开(公告)日:1985-07-02

    申请号:US392474

    申请日:1982-06-28

    申请人: Jean P. Huignard

    发明人: Jean P. Huignard

    摘要: A device is provided for the prolonged illumination of an object from an initial transitory illumination. This device comprises a laser whose cavity is closed by two total reflection mirrors; in the path of the intra-cavity radiation is disposed a photoexcitable interaction medium with index variation in the volume of which the transitory signal wave coming from the object and the intra-cavity radiation interfere; this interference generates in real time an index strata grating which diffracts a complex conjugate wave of the signal wave which returns to the object.

    摘要翻译: 提供了一种用于从初始瞬态照明延长照射物体的装置。 该装置包括一个激光器,其腔体由两个全反射镜封闭; 在腔内辐射的路径中设置光可变相互作用介质,其中来自物体的瞬态信号波和腔内辐射的体积具有指数变化; 这种干涉实时产生一个衍射信号波的复共轭的索引层光栅,该信号波返回到对象。

    Optical system for recording and reading an information on a tape
    6.
    发明授权
    Optical system for recording and reading an information on a tape 失效
    用于在磁带上记录和读取信息的光学系统

    公开(公告)号:US4199783A

    公开(公告)日:1980-04-22

    申请号:US900008

    申请日:1978-04-25

    CPC分类号: G11B7/128 G11B7/003

    摘要: An optical system for recording n information signals on a photosensitive tape in the form of a discontinuous track made up of parallel track sections by means of n light beams having a two states modulated intensity, being simultaneously deflected by an acousto-optical deflector and focusing on the tape in the form of n equidistant spots aligned in a direction x. The combination of the deflection and a translation movement of the tape produces a scanning movement of said n spots in a direction perpendicular to x. The same system is made for the reading of the information transcribed on the tape, the beams being then not modulated, by means of photodetector means which receive the light emerging from the tape and provide information signals in relation with the physical modifications obtained on the tape during the recording.

    摘要翻译: 一种用于通过具有两个状态调制强度的n个光束由平行轨迹部分构成的不连续轨道形式的n个信息信号记录的光学系统,同时由声光偏转器偏转并聚焦在 磁带以n个方位x对齐的n个等距点的形式。 带的偏转和平移运动的组合产生所述n个点在垂直于x的方向上的扫描运动。 用于读取在磁带上转录的信息的同样的系统,光束然后不被调制,借助于接收从磁带出射的光并且提供关于在磁带上获得的物理修改的信息信号的光电检测器装置 在录音过程中。

    Device for optical control of a beam-scanning antenna
    7.
    发明授权
    Device for optical control of a beam-scanning antenna 失效
    光束扫描天线的光学控制装置

    公开(公告)号:US4864312A

    公开(公告)日:1989-09-05

    申请号:US180313

    申请日:1988-04-11

    IPC分类号: G02F2/00 H01Q3/26

    CPC分类号: G02F2/002 H01Q3/2676

    摘要: Beam-scanning of an antenna by means of microwave phase shifts is achieved by N electrooptical modulators which receive two collinear beams having different frequencies. The modulators define optical paths having different wavelengths. N photodetectors make it possible to receive the beams reflected by the modulators and to control antenna elements during a 2 .pi. phase excursion.

    摘要翻译: 通过微波相移对天线的波束扫描由接收具有不同频率的两个共线波束的N个电光调制器实现。 调制器定义具有不同波长的光路。 N个光电检测器使得可以接收由调制器反射的光束并且在2π相位偏移期间控制天线元件。

    Optical Fourier transformer device and optical correlator incorporating
the said device
    8.
    发明授权
    Optical Fourier transformer device and optical correlator incorporating the said device 失效
    光学傅立叶变换器装置和包含所述装置的光学相关器

    公开(公告)号:US4514038A

    公开(公告)日:1985-04-30

    申请号:US345018

    申请日:1982-02-02

    IPC分类号: G02B27/46 G06E3/00 G06G9/00

    CPC分类号: G06E3/003

    摘要: This optical Fourier transformer device supplying the correlation function of two motifs of an object illuminated in coherent light by using the double diffraction principle is essentially characterized in that it generates a complex wave conjugate of a wave modulated by the object propagating in the opposite direction to the latter. This conjugate wave is produced by double diffraction in an interaction medium and compensates the distortions induced by the optical components of the system. The optical correlator system utilizing this Fourier transformer is essentially characterized in that it uses a recyclable material as the recording medium. A reading beam is subject to an angular scan making it possible to optimize the diffraction efficiency of this medium. The beam modulated by the object and the reading beam are synchronously deflected to improve the signal to noise ratio in the output plane.

    摘要翻译: 提供通过使用双衍射原理在相干光中照明的物体的两个图案的相关函数的该光学傅立叶变换器装置的基本特征在于其产生由相反方向传播的物体调制的波的复波共轭 后者。 该共轭波在相互作用介质中通过双衍射产生,并补偿由系统的光学部件引起的失真。 利用该傅立叶变换器的光学相关器系统的特征在于其使用可回收材料作为记录介质。 读取光束经受角度扫描,可以优化该介质的衍射效率。 由物体和读取光束调制的光束被同步偏转,以提高输出平面中的信噪比。

    Device for recording a coherent image in a multimode optical cavity
    10.
    发明授权
    Device for recording a coherent image in a multimode optical cavity 失效
    用于在多模光学腔中记录相干图像的装置

    公开(公告)号:US4576434A

    公开(公告)日:1986-03-18

    申请号:US652034

    申请日:1984-09-19

    IPC分类号: G03H1/00 G03H1/16 G03H1/28

    CPC分类号: G03H1/00

    摘要: An optical device for storing a coherent image in a multimode cavity makes use of two interaction media in which photoinduced phase gratings are recorded. By way of example, these media are photorefractive media. A first wave designated as an object wave travels through the cavity and interferes in each of these two media with a pumping wave in order to permit energy transfer from the pumping wave to the first wave.

    摘要翻译: 用于在多模腔中存储相干图像的光学装置利用其中记录光致相位光栅的两个相互作用介质。 作为示例,这些介质是光折射介质。 被指定为物体波的第一波浪通过空腔并且以泵浦波干扰这两个介质中的每一个,以便允许能量从泵浦波转移到第一波。