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Chemistry
A branch of physical science that is concerned with the study of matter and energy and how they interact.
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Chemistry > Spectroscopy
mirror displacement
Chemistry; Spectroscopy
The distance that the mirror in an interferometer has moved from zero path difference.
jacquinot advantage
Chemistry; Spectroscopy
This is the throughput advantage of FT-IRs over traditional spectrometers that require a slit aperture. The advantage varies as wavenumber and depends on resolution (because of ...
jacquinot
Chemistry; Spectroscopy
An aperture placed in the beam to restrict the divergence to the maximum compatible with the selected resolution. When choosing lower resolution you can improve the S/N by opening ...
interferogram
Chemistry; Spectroscopy
A plot of infrared detector response versus optical path difference. The fundamental measurement obtained by an FT-IR is an interferogram. Interferograms are Fourier transformed ...
fourier transform
Chemistry; Spectroscopy
Calculation performed on an interferogram to turn it into an infrared spectrum.
felgett (multiplex) advantage
Chemistry; Spectroscopy
An advantage of FT-IR instrument compared to scanning/single channel dispersive instruments. It is based on the fact that in an FT-IR all the wavenumbers of light are detected at ...
apodization functions
Chemistry; Spectroscopy
Functions used to multiply an interferogram to reduce the amount of sidelobes in a spectrum. Different types of apodization functions include boxcar, triangle, Beer-Norton, ...
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