A
spectrometer in which a single photodetector simultaneously receives signals from different spectral
bands which are specifically encoded. In the case of frequency multiplexing, each
spectral band is modulated at a specific frequency. Decoding is achieved by filtering
out, by electronic means, the corresponding signals. Frequency multiplexing may be
realized by changing the path difference between the two interfering beams at a uniform
rate. Fourier transform of the interferogram so obtained yields the spectrum. This
method is called
Fourier transform spectrometry (FTS).
Source:
PAC, 1995, 67, 1725
(Nomenclature, symbols, units and their usage in spectrochemical analysis-IX. Instrumentation
for the spectral dispersion and isolation of optical radiation (IUPAC Recommendations
1995))
on page 1729
Cite as:
IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by
A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997).
XML on-line corrected version: http://goldbook.iupac.org (2006-) created by M. Nic,
J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8.
https://doi.org/10.1351/goldbook.
