Fourier Transform Infrared Spectroscopy
FTIR shines broadband infrared light through a Michelson interferometer with a moving mirror, records intensity versus mirror position (the interferogram), and Fourier-transforms it to get the absorption spectrum; measuring all wavelengths simultaneously gives a large signal-to-noise advantage over scanning one wavelength at a time.
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FTIR shines broadband infrared light through a Michelson interferometer with a moving mirror, records intensity versus mirror position (the interferogram), and Fourier-transforms it to get the absorption spectrum; measuring all wavelengths simultaneously gives a large signal-to-noise advantage over scanning one wavelength at a time.
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