Feed-backward fibre-optical lattice architecture and method
    1.
    发明公开
    Feed-backward fibre-optical lattice architecture and method 失效
    后馈光纤光栅架构和方法

    公开(公告)号:EP0281237A3

    公开(公告)日:1991-12-04

    申请号:EP88300627.2

    申请日:1988-01-26

    IPC分类号: G06G9/00 G02B6/28

    摘要: A lattice (10)includes a transmit bus (14) formed of a single mode optical fiber and a return bus (16) formed of a multimode optical fiber. An optical transmitter (12) applies input signals to the transmit bus (14), and an optical receiver (20) receives the signals guided by the return bus (16). The return fiber bus (16) is looped around the couplers (18A, 18B, etc.) so that the signal output from each segment of the lattice (10) passes through all the preceding segment sbefore reaching the receiver (20). The optical couplers (18A, 18B, etc.) have asymmetric coupling efficiencies so that recirculating light is attenuated.

    摘要翻译: 格子(10)包括由单模光纤形成的发送总线(14)和由多模光纤形成的返回总线(16)。 光发射器(12)将输入信号施加到发射总线(14),光接收器(20)接收由返回总线(16)引导的信号。 返回光纤总线(16)围绕耦合器(18A,18B等)环绕,使得从格子(10)的每个段输出的信号在到达接收器(20)之前穿过所有先前的段。 光耦合器(18A,18B等)具有不对称耦合效率,从而使再循环光衰减。

    HOLOGRAPHIC OPTICAL PROCESSING METHOD AND APPARATUS.
    3.
    发明公开
    HOLOGRAPHIC OPTICAL PROCESSING METHOD AND APPARATUS. 失效
    全息光学方法和设备。

    公开(公告)号:EP0101507A4

    公开(公告)日:1984-11-07

    申请号:EP83901023

    申请日:1983-02-14

    申请人: UNIV DAYTON

    CPC分类号: G03H1/00 G06E3/003

    摘要: A method and apparatus for performing optical processing on optical information corresponding to a subject (66) combines known optical processing techniques with holography. A reverse ray-trace holographic system is provided so that the image reconstruction beam (90) passes through the optical system in a direction exactly opposite to that travelled by the subject beam (50) during recording of the hologram (88). Aberrations introduced by the system optics are then completely compensated for, allowing use of lower aquality optical components. A single large-aperture lens (68) is used to define a Fourier transform of the optical subject information as the hologram (88) is recorded or the image reconstructed, and the subject information is manipulated within the Fourier transform plane (91).

    Electro-optic modulator
    4.
    发明公开
    Electro-optic modulator 失效
    电光调制器。

    公开(公告)号:EP0077188A2

    公开(公告)日:1983-04-20

    申请号:EP82305360.8

    申请日:1982-10-08

    申请人: XEROX CORPORATION

    摘要: A two dimensional electro-optic modulator (12) comprises an electro-optic element and a two dimensional planar array of individually addressable electrodes (17a-17i, 18a-18i, 19a-19l) for spatially modulating a light beam (32) along a plurality of transverse axes or for imparting a geometric phase front to the light beam. Such a modulator may be used, for example, (1) in a real time or in a time delay and integration mode as a multigate light valve for (a) electro-optic line printing or (b) optical displays, or (2) in a real time mode as (a) a beam focussing and tracking device for optical memories or (b) an arcal input device, a Fourier plane filter, or an image plane correlation mask for optical processing.

    Dispositif optique transformateur de Fourier, et corrélateur optique mettant en oeuvre ce dispositif optique transformateur de Fourier
    5.
    发明公开

    公开(公告)号:EP0058592A1

    公开(公告)日:1982-08-25

    申请号:EP82400164.8

    申请日:1982-01-28

    申请人: THOMSON-CSF

    IPC分类号: G06G9/00

    CPC分类号: G06E3/003

    摘要: L'invention concerne un dispositif optique transformateur de Fourier, et un corrélateur optique mettant en oeuvre ce dispositif optique transformateur de Fourier, fournissant la fonction de corrélation de deux motifs d'un objet éclairés en lumière cohérente, en utilisant le principe de la double diffraction.
    Le système transformateur de Fourier selon l'invention se caractérise essentiellement en ce qu'il génère une onde complexe conjuguée d'une onde modulée par l'objet, se propageant en sens inverse de celle-ci. Cette onde conjuguée étant crée par double diffraction dans un mileu d'interaction (2) pour compenser ainsi les distorsions induites par les composants optiques du système.
    Le système corrélateur optique mettant en oeuvre ce système transformateur de Fourier se caractérise essentiellement en ce qu'il utilise comme milieu d'enregistrement un matériau recyclable (10). Un faisceau de lecture (F R ) subissant un balayage angulaire permet d'optimiser le rendement de diffraction de ce milieu. Le faisceau modulé par l'objet et le faisceau de lecture sont défléchis de matière synchrone pour améliorer le rapport signal/bruit dans le plan de sortie (7).
    Application à la poursuite des cibles et à la robotique.

    Cascaded fiber optic lattice filter
    6.
    发明公开
    Cascaded fiber optic lattice filter 失效
    CASCADED光纤光栅滤光片

    公开(公告)号:EP0165773A3

    公开(公告)日:1989-07-12

    申请号:EP85304203.4

    申请日:1985-06-13

    IPC分类号: G02B6/28 G06G9/00 H04B9/00

    CPC分类号: H04L25/03057 G02B6/2861

    摘要: A fiber optic lattice filter having a transfer function wherein the poles and zeros are adjustable independently of each other. The filter comprises a cascaded configuration of recursive (100) and non-recursive (102) fiber optic lattice filters. In one preferred embodiment, an all-pass fiber optic filter is formed by cascading all-pole and all-zero lattice filters, and by processing the resulting filtered output signal in a subtractive detection system (104). This detection system produces a signal which represents the difference between two signal outputs provided by the all-zero filter section, and which is adjustable in magnitude, thereby providing an overall filtering function which is capable of handling both positive and negative valued input signals.

    Procédé et dispositif de navigation par re-localisation d'un mobile sur une carte
    8.
    发明公开
    Procédé et dispositif de navigation par re-localisation d'un mobile sur une carte 失效
    导航方法和装置地图上的导弹的重新定位。

    公开(公告)号:EP0056348A2

    公开(公告)日:1982-07-21

    申请号:EP82400043.4

    申请日:1982-01-12

    申请人: MATRA

    发明人: Do Mau, Lam

    IPC分类号: G01C21/00 G06G9/00

    CPC分类号: G01C21/005

    摘要: Pour re-localiser un mobile (11) de direction de déplacement connue (10) sur une carte, on établit une carte en deux parties complémentaires dont les transparences en chaque point i et 1 sont, l'une, fonction croissante de la valeur du paramètre représenté par la carte, l'autre, fonction décroissante. On mémorise les valeurs successives du paramètre, mesurées à partir du mobile sur un segment; on détermine les flux lumineux qui traversent les bandes de la carte parallèles à la trajectoire théorique lorsqu' on dirige à travers la carte des flux dont l'un, i', est fonction croissante du paramètre mémorisé et dont l'autre i', est fonction décroissante; et on détermine l'emplacement transversal et longitudinal du segment pour lequel on a la meilleure corrélation.

    SIGNAL PROCESSING APPARATUS AND METHOD.
    9.
    发明公开
    SIGNAL PROCESSING APPARATUS AND METHOD. 失效
    VORRICHTUNG UND VERFAHREN ZUR SIGNALVERARBEITUNG。

    公开(公告)号:EP0041979A4

    公开(公告)日:1982-04-22

    申请号:EP81900047

    申请日:1980-12-16

    CPC分类号: H03K19/14 G06E3/005

    摘要: Signal processing, particularly correlation and auto-correlation, is effected using a "light panel". The light panel consists of (a) an array of two-terminal light-emitting or light-modulating elements (10), the optical state of each element being changed from a first state to a second state when a voltage difference is applied across its terminals, and (b) a complementary array of photo-diodes (12), each arranged to receive light from a respective element of the array of light-emitting or light-modulation elements (10). The interconnection between the two arrays may be simply an optical lens (11). For auto-correlation, each array may be a linear array, with the signal from a single signal source applied to the terminals of each element (10) both instantaneously and after a predetermined time delay. For cross-correlation, each element (10) will be located at a cross-over point of an m x n matrix of conductors (insulated from each other) with its terminals connected to respective conductors at the cross-over point. When the light panel is used for correlation, the photodiodes act as charge integrators. Uses of the apparatus and method include image processing, image analysis and speckle interferometry.

    摘要翻译: 信号处理,特别是相关和自相关,是使用“光板”实现的。 该光板由(a)两端发光或光调制元件阵列(10)组成,每个元件的光学状态从第一状态变为第二状态,当施加电压差时 (b)光电二极管(12)的互补阵列,每个光电二极管被设置为接收来自发光或光调制元件阵列(10)的相应元件的光。 两个阵列之间的互连可以简单地是光学透镜(11)。 对于自相关,每个阵列可以是线性阵列,其中来自单个信号源的信号在预定时间延迟之后立即施加到每个元件(10)的端子。 对于互相关,每个元件(10)将位于导体的m×n矩阵的交叉点(彼此绝缘),其端子在交叉点处连接到相应的导体。 当光板用于相关时,光电二极管可用作电荷积分器。 该设备和方法的用途包括图像处理,图像分析和散斑干涉测量。

    Optical system for high speed ambiguity function evaluation
    10.
    发明公开
    Optical system for high speed ambiguity function evaluation 失效
    Optisches System zum schnellen Auswerten einer Mehrdeutigkeitsfunktion。

    公开(公告)号:EP0045069A2

    公开(公告)日:1982-02-03

    申请号:EP81105852.8

    申请日:1981-07-24

    申请人: HONEYWELL INC.

    IPC分类号: G06G9/00

    CPC分类号: G06E3/001 G02B27/46

    摘要: An optical system for generating the ambiguity function for two signals uses one-dimensional spatial light modulators (34, 35; 39, 40) to code the signals into a beam of substantially coherent light. After the light has been coded with the first one-dimensional signal a Fourier Transform is performed by lens means (36). A linear phase shifter (37) is placed in the Fourier Transform plane (U). This has the effect of creating a linear dependence along a second dimension when a second Fourier Transform is performed by second Fourier Transform lens means (41) and produces the ambiguity function at the ambiguity plane (U 3 ).

    摘要翻译: 用于产生两个信号的模糊函数的光学系统使用一维空间光调制器(34,35; 39,40)将信号编码成基本相干光束。 在用第一个一维信号对光进行了编码之后,透镜装置(36)执行傅立叶变换。 线性移相器(37)被放置在傅立叶变换平面(U1)中。 这具有当通过第二傅立叶变换透镜装置(41)执行第二傅里叶变换时沿着第二维度产生线性相关性的效果,并且在歧义平面(U3)处产生模糊度函数。