GAS ANALYSER Russian patent published in 1995 - IPC

FIELD: optical instrumentation. SUBSTANCE: gas analyser has radiation source, modulator with interference light filters of working and reference channels, working dish with analyzed gas mixture and photodetector optically coupled. Gas analyser is supplemented with second radiation source, interferometer including lens, light-splitting mirror, standard dich with maixture of analyzed gas and gas-thinner, comparison dish with gas-thinner, second photodetector connected to drive mechanically coupled to compensator put on optical axis of interferometer. In this case first and second identical outputs of interferometer formed by lens and light-splitting mirror are optically coupled to first and second photodetectors correspondingly. EFFECT: increased accuracy of analysis and metrological reliability of gas analyser. 1 dwg