Fourier Transform Infrared Spectroscopy (FT-IR)

Measured values

  • Spectral transmission or reflection


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.


Characterization of optical components such as resonator mirrors or laser windows in view of spectral transmission or reflection (quality inspection)

Literature / References

  • 1. Nickel, D., Fleig, C., Erhard, A., Letsch, A., Giesen, A., Riede, W. et al.: Results of a "Round Robin" experiment on reflectivity measurements at a wavelength of 1.06µm. Boulder Damage Symposium, Boulder, Colorado, USA ,16-18 September 2002, SPIE, Laser-Induced Damage in Optical Materials: 2002 and 7th International Workshop on Laser Beam and Optics Characterization, S. 520-526, SPIE, (2003)

Institute / Organization

Institute of Technical Physics


Wolfgang Riede
Institute of Technical Physics

Oliver Miedaner
Technology Marketing

Similar Measures

Subsequent references to data sheets are given which describe with high probability similar measured values. The selection is made on the basis of semantic affinity:

Spectral transmission or reflection :: more