Multipass System with Large Relative Aperture

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Abstract
A six-pass system is proposed aimed at the problems of the high-temperature spectroscopy. As compared to the classical White system, the design under consideration provides twice increased relative aperture at the same transversal size of the cell and uses simple cylindric tubes instead of cells of more complicated shape. The proposed design is the unique multipass system with compensated astigmatism. The system could be recommended for gas analytical device of moderate sensitivity and also for the cells with the fixed path length in the various i.r. spectrometers in particular, in the Fourier-spectrometers.

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