INFRARED ABSORPTION GAS ANALYZER Russian patent published in 1996 - IPC

FIELD: analytical instrument engineering. SUBSTANCE: gas ANALYZER has radiation source, radiation spectral selection aids, working dish for tested matter and radiant energy receiver, connected to electron measurement circuit. Radiation spectral selection aids are made in form of at least two light filters mounted along the direction of radiation propagation. Moreover, Q-factors of light filters at spectral ranges corresponding to each transmission band of radiation spectral selection aids satisfy to the relation $$$, where $$$ is Q-factor of n-th light filter within i-th transmission band; $$$ is Q-factor of $$$-th light filter along radiation direction within i-th transmission band. EFFECT: improved efficiency of operation. 4 cl, 3 dwg