# Fourier transform

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Fourier transform
(FT)
A mathematical operation which converts a function of one independent variable to one of a different independent variable. In FT–IR spectroscopy, the Fourier transform converts a time function (the interferogram) to a frequency function (the infrared absorption spectrum). Spectral data are collected through the use of an interferometer, which replaces the monochrometer found in the dispersive infrared spectrometer.

Forensic science glossary. . 2012.

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• Fourier transform — Fourier transforms Continuous Fourier transform Fourier series Discrete Fourier transform Discrete time Fourier transform Related transforms The Fourier transform is a mathematical operation that decomposes a function into its constituent… …   Wikipedia

• Fourier transform — Fourier transformacija statusas T sritis automatika atitikmenys: angl. Fourier transform; Fourier transformation vok. Fourier Transformation, f rus. преобразование Фурье, n pranc. transformation de Fourier, f; transformée de Fourier, f ryšiai:… …   Automatikos terminų žodynas

• Fourier transform — Math. a mapping of a function, as a signal, that is defined in one domain, as space or time, into another domain, as wavelength or frequency, where the function is represented in terms of sines and cosines. [1920 25; see FOURIER ANALYSIS] * * *… …   Universalium

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• Fourier Transform IR — Die Fourier Transformations IR Spektroskopie (FTIR) oder Fourier Transformations Infrarotspektroskopie ist eine besondere Variante der Infrarotspektroskopie. Über Fourier Transformation werden aus den mit Hilfe eines Interferometers, z. B. dem… …   Deutsch Wikipedia

• fourier transform — noun also fourier transformation ˈfu̇rēˌā , fu̇rˈyā Usage: usually capitalized F Etymology: after Baron Jean Baptiste Joseph Fourier died 1830 French geometrician and physicist : any of various functions (as F(u)) that under suitable conditions… …   Useful english dictionary

• Fourier transform — noun Date: 1923 any of various functions (as F(u)) that under suitable conditions can be obtained from given functions (as f(x)) by multiplying by eiux and integrating over all values of x and that in scientific instrumentation describe the… …   New Collegiate Dictionary

• Fourier transform — noun a transform, applied to a function, used to determine the functions frequency composition (temporal, spatial or otherwise); it has many scientific and industrial applications, especially in signal processing …   Wiktionary

• Fourier transform — noun Mathematics a function derived from a given non periodic function and representing it as a series of sinusoidal functions …   English new terms dictionary

• Fourier transform spectroscopy — is a measurement technique whereby spectra are collected based on measurements of the temporal coherence of a radiative source, using time domain measurements of the electromagnetic radiation or other type of radiation.It can be applied to a… …   Wikipedia