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Thermo Fisher Scientific

FT-IR - Basic Theory Understanding How FTIR Works


FT-IR stands for Fourier Transform Infrared. It is a fast and dynamic technique for collecting infrared spectra of an enormous variety of compounds for a wide range of industries. Work done by Fellgett and Jacquinot during the 1950’s formed the fundamental theoretical advantage of FT-IR spectrometers over traditional monochromator-based instruments. Their work laid the foundation for FT-IR spectroscopy. Work since then has expanded on the concept that FT-IR spectrometers are very fast, accurate, sensitive and reliable.



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