Abstract

A technique for calculating absorption interference patterns of aromatic hydrocarbons with allowance for the birefringence dispersion of an interference-polarization filter is proposed. An experimental model of an optical absorption gas analyzer based on a Wood filter with magnesium-fluoride plates for measuring benzene and toluene characteristics is described. The measurement data are compared with the calculation results. The possibility of applying a combined plate to improve the selectivity of absorption measurements for benzene with respect to toluene is considered.

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