Airport Installation

Aircraft Engineering and Aerospace Technology

ISSN: 0002-2667

Publication date: 1 April 1972


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.


(1972), "Airport Installation", Aircraft Engineering and Aerospace Technology, Vol. 44 No. 4, pp. 33-34.

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Copyright © 1972, MCB UP Limited

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