KR-GAS ANALYSER Russian patent published in 2019 - IPC G01N21/03 G01N21/65 

FIELD: measuring equipment.

SUBSTANCE: invention relates to the field of measurement equipment and relates to the KR-gas analyser. Gas analyser includes a continuous laser, a gas cell, two lenses, a holographic filter which blocks radiation in the wavelength region of the laser, a spectral device coupled with a multichannel photodetector and a control unit. Inside the cuvette there are four identical collecting lenses arranged on one optical axis oriented parallel to the slit of the spectral instrument, such that the distance between the central lenses is equal to the double focal distance. In focus of extreme lenses are installed opposite to each other ends of optical fiber, and between adjacent lenses, one of which is extreme, there is a rotating mirror so that laser radiation is completely directed inside optical fiber. Aperture angle of the collecting lenses has a value which is not less than the angle for which conditions of total internal reflection are satisfied when propagating laser radiation over the optical fiber.

EFFECT: technical result consists in increase in the recorded signals intensity.

1 cl, 1 dwg