A method is proposed for determining the optical characteristics of glass plates after physicochemical surface treatment by measuring spectra of ellipsometric angles at incidence angles equal to Brewster’s angle. The dispersion dependence of the refractive index could be determined and the surface layer thickness during the plate manufacturing process could be estimated using the coordinates of the ellipsometric-angle spectral minima. Refractive-index spectra calculated by the Brewster formula for KU-1 optical quartz plates in the non-absorbing region were in satisfactory agreement with spectra determined by numerical methods in the DeltaPsi2 software of a UVISEL 2 spectral ellipsometer (Horiba). The relative error of a refractive-index determination of the quartz plates by the proposed method was ≤0.1%.
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Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 87, No. 1, pp. 122–129, January–February, 2020.
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Staskov, N.I., Mohammedmuradov, A.A., Krekoten, N.A. et al. Optical Characteristics of Parallel-Sided Quartz Plates at Brewster Angles Determined by Spectral Ellipsometry. J Appl Spectrosc 87, 105–111 (2020). https://doi.org/10.1007/s10812-020-00970-y
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DOI: https://doi.org/10.1007/s10812-020-00970-y