The Eltro transmissometers for visibility measurement comparison work on the principle of a special photometric double beam. The light beam emitted from the light source is chopped and then divided into two beams by means of a beam splitter; one of them passes through the free atmosphere and then is reflected by a triple mirror. The amplitude of the other one — used as reference beam — is modulated a second time.


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    Title :

    Airport Installation


    Subtitle :

    On exhibition at the Hanover air show



    Publication date :

    1972-04-01


    Size :

    2 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



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