Research of spectral characteristics of optical absorption gas analyzer for freon monitoring in air medium

The optical scheme of optical absorption gas analyzer which optimized for measuring the freons content, is presented. The radiation source with a given maximum of spectral density of radiant emittance in the range from 8 to 10 $\mu$m, with a reference channel of 9.5 $\mu$m and a measurement threshold of 1 ppm is developed and studied. The design of the interference filter system is developed.