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We present a method for the deconvolution of spectral line profiles - the subtraction of the apparatus function. This inversion problem requires solution of the Fredholm integral equation of the first kind. For this purpose we suggest the use of B-splines. The efficiency of the approach is demonstrated using test examples as well as the deconvolution of the H spectral line profile, measured by means of the Fabry-Perot interferometer. The H line was emitted by a low temperature plasma in RF discharge burning in water vapour at reduced pressure. This deconvolution method is compared with the standard least squares method, where the initial profile is described by the Voigt function.
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Brablec et al. (1999) studied this question.
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