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Oct 3, 2007

FTIR Spectrometer

An FTIR (Fourier Transform InfraRed) is a method of obtaining infrared spectra by first collecting an interferogram of a sample signal using an interferometer, then performing a Fourier Transform on the interferogram to obtain the spectrum. An FTIR Spectrometer is a spectral instrument that collects and digitizes the interferogram, performs the FT function and displays the spectrum.

The FTIR is based on a Michelson Interferometer, that consists of, at least a beam splitter and two mirrors. This instrument produces interference between two beams of light waves propagated through two separate optical path lengths. Useful interference only occurs between light waves of the same frequency and constant phase relation.





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1 comment:

Anonymous said...

nice and helpful pic, thanks

December 1, 2008 at 12:56 AM

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