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Single-Lens Magnesium Fluoride Monochromator for the 113–140 nm Spectral Range
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Journal Article
Single-Lens Magnesium Fluoride Monochromator for the 113–140 nm Spectral Range
2022
Overview
Abstract—An optical scheme is described for a compact focal monochromator with a plano-convex magnesium-fluoride lens for measuring and analyzing transmission spectra of transparent objects in the vacuum ultraviolet spectral range within air transparency bands in the 113—140 nm spectral range. Short distances between the source and detector in the range from 5 to 40 mm allow operation in air, using the presence of bands of mutual partial transmittance of oxygen and water vapor at wavelengths of 114.2, 116.4, 118.5, 121.2, 123.5, and 127.0 nm. Simulated absorption spectra of air spaces of different lengths are presented in the spectral range of interest. Deuterium lamp emission spectra are experimentally measured in the 113–140 nm spectral range after passing through air gaps of different lengths. The monochromator spectral resolution reaching 50 near the magnesium fluoride absorption edge is defined by the joint contribution of the lens dispersion and radiation filtering in the air spectral transmittance bands.
Publisher
Springer Nature B.V
Subject
