Term: Fourier transform spectrometer
https://doi.org/10.1351/goldbook.F02493

Definition:
A scanning interferometer, containing no principal dispersive element, which first splits a beam into two or more components, then recombines these with a phase difference. The spectrum is obtained by a Fourier transformation of the output of the interferometer.

Related Terms:
1) multiplex spectrometer (http://doi.org/10.1351/goldbook.M04059).
2) interferometer (http://doi.org/10.1351/goldbook.I03094).
3) transformation (http://doi.org/10.1351/goldbook.T06446).

Source: PAC, 1996, 68, 2223. 'Glossary of terms used in photochemistry (IUPAC Recommendations 1996)' on page 2243 (https://doi.org/10.1351/pac199668122223)

Citation: 'Fourier transform spectrometer' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.F02493

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