A system for detecting contamination of a window of an optical system includes a polarizing beamsplitter, a quarter waveplate, a photodetector, and a processor. The polarizing beamsplitter is configured to receive a laser beam having a first polarization and reflect the laser beam having the first polarization to the window. The photodetector is configured to sense a magnitude of reflections of the laser beam from the window having a second polarization, wherein the polarizing beamsplitter passes the reflections of the laser beam from the window having the second polarization to the photodetector. The processor is configured to determine a contamination level of the window based upon the magnitude of the reflections of the laser beam from the window.


    Access

    Download


    Export, share and cite



    Title :

    Window contamination sensor for optical detection systems


    Contributors:

    Publication date :

    2015-08-04


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    G01J Messen der Intensität, der Geschwindigkeit, der spektralen Zusammensetzung, der Polarisation, der Phase oder der Pulscharakteristik von infrarotem, sichtbarem oder ultraviolettem Licht , MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT / B64D Ausrüstung für Flugzeuge , EQUIPMENT FOR FITTING IN OR TO AIRCRAFT / G01N Untersuchen oder Analysieren von Stoffen durch Bestimmen ihrer chemischen oder physikalischen Eigenschaften , INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES



    WINDOW CONTAMINATION SENSOR FOR OPTICAL DETECTION SYSTEMS

    RAY MARK / ANDERSON KAARE JOSEF | European Patent Office | 2018

    Free access

    WINDOW CONTAMINATION SENSOR FOR OPTICAL DETECTION SYSTEMS

    RAY MARK / ANDERSON KAARE JOSEF | European Patent Office | 2022

    Free access

    WINDOW CONTAMINATION SENSOR

    HALAMA GARY | European Patent Office | 2022

    Free access

    Window contamination sensor

    HALAMA GARY | European Patent Office | 2023

    Free access

    Monitor for optical-window contamination

    Harnett, L. N. | NTRS | 1977