RAMAN GAS ANALYSER Russian patent published in 2021 - IPC G01N21/65 G01J3/44 

FIELD: measuring equipment.

SUBSTANCE: invention relates to the field of measuring equipment and pertains to a Raman scattering gas analyser. The Raman gas analyser is comprised of a laser, a gas dish, two lens objectives intended for collecting scattered radiation, wherein a light filter is installed between said objectives, blocking radiation in the area of the laser wavelength, a spectral apparatus coupled with a multi-channel photodetector, and a control unit. A lens is installed on the side of the input window of the dish, focusing the radiation into the centre of the dish, and a concave mirror is installed on the side of the output window, the focus whereof matches the focus of the lens. A flat mirror with a hole is installed between said mirror and the output window of the dish. The mirror is positioned so that the laser beam passes through the hole and the scattered light is directed to the lens objective when reflected from the flat mirror. A fibre-optic converter is installed between the input slit of the spectral apparatus and the lens objective, at the input end whereof the fibres are oriented in a geometric shape following the cross-section of the dish, and at the output end the fibres are oriented in a vertical line aligned with the input slit of the spectral apparatus.

EFFECT: improving the signal-to-noise ratio and increasing the accuracy of the performed measurements.

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