Index of Measures

Spectral transmission or reflection
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Fourier Transform Infrared Spectroscopy (FT-IR)

DLR Institute of Technical Physics

Main components of an FT-IR spectrometer are a broadband light source, a Michelson-interferometer and an appropriate detector (Si or Ge). By tuning one interferometer arm, an interferogram is recorded. This interferogram is then Fourier transformed and a characteristic transmission or reflection spectrum of the sample is obtained. Measuring ranges are 0.7 -1.2 µm, 1.0 -2.5 µm and 2.5-25 µm..

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