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    OPTICAL NOTCH FILTER FOR DISCRIMINATING AGAINST COHERENT RADIATION
    31.
    发明公开
    OPTICAL NOTCH FILTER FOR DISCRIMINATING AGAINST COHERENT RADIATION 失效
    光电网滤波器单独KOHERÄNTER辐射。

    公开(公告)号：EP0326612A1

    公开(公告)日：1989-08-09

    申请号：EP88908805.0

    申请日：1988-07-05

    Applicant: HUGHES AIRCRAFT COMPANY

    Inventor： O'MEARA, Thomas, R.

    IPC: G01J9 ,  G02B26 ,  G02F1

    CPC classification number: G01J9/02 ,  G01J2009/0211 ,  G02F1/11

    Abstract: A self-tuning optical notch filter is employed to separate coherent from noncoherent radiation in an overall beam. The presence of coherent radiation is detected, preferably with an interferometer, and the frequency of the detected coher­ ent radiation is determined. An electrical control signal is generated with a frequency corresponding to that of the coher­ ent radiation, and causes an optical filter to filter out the coherent radiation from the beam. In the preferred embodiment the optical filter is a Bragg cell, and the electrical control signal is applied to an electro-acoustic transducer which fur­ nishes an acoustic control signal to the Bragg cell.

    Coherent radiation detecting apparatus
    33.
    发明公开
    Coherent radiation detecting apparatus 失效
    检测器装置，用于相干辐射。

    公开(公告)号：EP0134487A2

    公开(公告)日：1985-03-20

    申请号：EP84108079.9

    申请日：1984-07-10

    Applicant: THE PERKIN-ELMER CORPORATION

    Inventor： Krohn, William T. ,  McNally, Mark J. ,  Abreu, Rene

    IPC: G01J9/02

    CPC classification number: G01J9/02 ,  G01J2009/0211

    Abstract: This invention relates to unequal path interferometers which are adapted, among other possible uses, for use in detecting coherent radiation as from a laser in a packet of radiation including incoherent background radiation, which includes an unequal optical path length interferometer of the type in which portions of the radiation impinging on the interferometric component are caused to be recombined after travelling two different optical paths; the optical paths differing in length by an amount substantially greater than the coherence length of the non-coherent radiation but substantially less than the coherence length of the coherent radiation; the unequal optical path length interferometric component including a crystalline cell having anisotropic properties; circuitry for applying an ultrasonic sound wave to the crystalline cell to vary the effective index of refraction of the crystalline cell in a preselected systematic manner; a detector for detecting the intensity of the recombined portions and producing a signal representative thereof, said signal having a variable component caused by the varying constructive and destructive interference of the recombined coherent radiation components, while the recombined non-coherent radiation components produce only a substantially steady background signal.

    전자파의 진폭정보와 위상을 감지하는 방법 및 장치
    35.
    发明公开
    전자파의 진폭정보와 위상을 감지하는 방법 및 장치 有权
    用于确定电磁波的相位和/或幅度数据的方法和装置

    公开(公告)号：KR1020000068490A

    公开(公告)日：2000-11-25

    申请号：KR1019997001903

    申请日：1997-09-05

    Applicant: 슈바르테, 루돌프

    Inventor： 슈바르테,루돌프

    IPC: G01J9/00

    CPC classification number: G01J9/02 ,  G01J1/44 ,  G01J2001/446 ,  G01J2009/0211

    Abstract: 본발명은전자파의진폭정보와위상을감지하기위한방법과장치에관한것으로서, 상기방법을얻어내기위한공간깊이분해능을야기시키기위하여다음과같은단계로이루어진다. 전자파가적어도하나의픽셀에서구성된포토닉혼합요소의표면으로조사되고, 이픽셀은적어도두 개의광민감변조광 게이트 GG와관련된어큐뮬레이션게이트 GG를갖는다; U(t)= U+ U(t)과 U(t)= U- U(t)로구성된변조광게이트전압 U(t)와 U(b)은변조광게이트 GG로적용된다. 변조전압 U(t)의진폭과전체전압 U와적어도동일한크기를갖는직접적인전압이어큐뮬레이션게이트 GG에적용된다. 입사전자파에의하여변조광게이트 GG의차지영역에서발생된차지캐리어는변조광게이트전압 U(t)와 U(b)의극성의기능으로작용한다; 차지 qq는각각어큐뮬레이션게이트 GG로표류되어변환된다. 포토닉혼합요소는적어도두 개의광감도변조광 게이트(G, G)와변조광 게이트와관련된어큐뮬레이션게이트(GG)로구성된적어도하나의픽셀을갖고, 입사전자파에관해분배된다. 다수의포토닉혼합요소는배열을형성하기위하여조합될수 있다.

    Interferometrisches Messsystem
    38.
    发明公开
    Interferometrisches Messsystem 失效
    干涉测量系统

    公开(公告)号：EP0415143A3

    公开(公告)日：1991-11-21

    申请号：EP90115295.9

    申请日：1990-08-09

    Applicant: Alcatel SEL Aktiengesellschaft ,  ALCATEL N.V.

    Inventor： Dütting, Kaspar ,  Wünstel, Klaus, Dr. rer. nat. ,  Mayer, Hans-Peter, Dr. rer. nat. ,  Lösch, Kurt, Dr. rer. nat.

    IPC: G01B9/02

    CPC classification number: G01J9/02 ,  G01J9/0246 ,  G01J2009/004 ,  G01J2009/0211

    Abstract: Interferometrische Meßsysteme sind bekannt. Sie enthalten eine Lichtquelle zur Erzeugung kohärenten Lichtes und einen Interferometeraufbau, bestehend aus mindestens einem Strahlteiler und zwei Reflektoren sowie Linsen zur Bündelung des Lichtstrahls. Erfindungsgemäß dient ein solches Meßsystem zur Untersuchung des von einer Laserlichtquelle (1) ausgesandten Lichtbündels (30) auf Frequenz, Moden, Modenstabilität, Modenverteilung sowie Kohärenzlänge und Kohärenzzeit etc. Das Lichtbündel (30) wird durch eine Linse parallel gemacht, gelangt anschließend über den Strahlteiler (3) in zwei Teilbündel (31, 32) zu den Reflektoren (4, 5). Einer der beiden Teilbündel durchläuft ein Referenz-Interferenzmuster (7). Beide Teilbündel (31, 32) interferieren miteinander und werden über ein optisches System zur Verringerung der numerischen Apertur einem Photoempfänger (10) zugeführt. Besonders vorteilhaft ist es, wenn möglichst viele optische Bauelemente, insbesondere die Linse (2) der Strahlteiler (3) die Reflektoren (4, 5) und das Referenz-Interferenzmuster (7) auf einem Block (6) monolithisch integriert sind.

    Coherent radiation detecting apparatus
    40.
    发明公开
    Coherent radiation detecting apparatus 失效
    相干辐射检测装置

    公开(公告)号：EP0134487A3

    公开(公告)日：1985-12-27

    申请号：EP84108079

    申请日：1984-07-10

    Applicant: THE PERKIN-ELMER CORPORATION

    Inventor： Krohn, William T. ,  McNally, Mark J. ,  Abreu, Rene

    IPC: G01J09/02

    CPC classification number: G01J9/02 ,  G01J2009/0211

    Abstract: This invention relates to unequal path interferometers which are adapted, among other possible uses, for use in detecting coherent radiation as from a laser in a packet of radiation including incoherent background radiation, which includes an unequal optical path length interferometer of the type in which portions of the radiation impinging on the interferometric component are caused to be recombined after travelling two different optical paths; the optical paths differing in length by an amount substantially greater than the coherence length of the non-coherent radiation but substantially less than the coherence length of the coherent radiation; the unequal optical path length interferometric component including a crystalline cell having anisotropic properties; circuitry for applying an ultrasonic sound wave to the crystalline cell to vary the effective index of refraction of the crystalline cell in a preselected systematic manner; a detector for detecting the intensity of the recombined portions and producing a signal representative thereof, said signal having a variable component caused by the varying constructive and destructive interference of the recombined coherent radiation components, while the recombined non-coherent radiation components produce only a substantially steady background signal.

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