Wavenumber Scale Shift in Fourier Transform Infrared Spectrometers Due to Vignetting
Abstract:Absorbance subtraction spectra, a common application of Fourier transform infrared (FT-ir) spectrometers, typically requires wavenumber scale repeatabilities of the order of 10−3 cm−1. Such repeatabilities are possible only if both spectra are taken with the same or no vignetting, as the following analysis shows.
Document Type: Short Communication
Affiliations: Block Engineering, Inc., Cambridge, Massachusetts 02139
Publication date: September 1, 1976
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