Why control the beam geometry in an FTIR spectrometer?

J. Sellors; R. A. Spragg

doi:10.1117/12.166704

31 January 1994 Why control the beam geometry in an FTIR spectrometer?

J. Sellors, R. A. Spragg

Proceedings Volume 2089, 9th International Conference on Fourier Transform Spectroscopy; (1994) https://doi.org/10.1117/12.166704
Event: Fourier Transform Spectroscopy: Ninth International Conference, 1993, Calgary, Canada

Abstract

FTIR spectrometers generate a beam of finite area and convergence. Appropriately located variable apertures can be used to control both the area and the convergence of the beam. We have used a spectrometer fitted with such apertures to investigate their effect on transmission and reflection spectra. Perhaps the most significant finding is that the relative intensities of bands in an ATR spectrum can be altered by more than 10% simply by varying the beam convergence.

Citation Download Citation

J. Sellors and R. A. Spragg "Why control the beam geometry in an FTIR spectrometer?", Proc. SPIE 2089, 9th International Conference on Fourier Transform Spectroscopy, (31 January 1994); https://doi.org/10.1117/12.166704

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