Spectral bandwidth limitations of static common-path and single-mirror Fourier transform infrared spectrometers

Schardt, Michael; Tremmel, Anton J.; Rauscher, Markus S.; Murr, Patrik J.; Koch, Alexander W.

doi:10.1364/fts.2016.fth2c.5

Cited by 4 publications

(1 citation statement)

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“…Thus, for process monitoring in industrial environments, the use of static systems offers certain benefits. Static single-mirror Fourier transform spectrometers (sSMFTS) [ 11 , 12 ] show a rugged and compact design with high SNR, as they work without moving parts and still are based on the Fourier transform principle. Temperature effects can be compensated with suitable algorithmic corrections [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

Gas Measurement Using Static Fourier Transform Infrared Spectrometers

Köhler

Schardt

Rauscher

et al. 2017

Sensors

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Online monitoring of gases in industrial processes is an ambitious task due to adverse conditions such as mechanical vibrations and temperature fluctuations. Whereas conventional Fourier transform infrared (FTIR) spectrometers use rather complex optical and mechanical designs to ensure stable operation, static FTIR spectrometers do not require moving parts and thus offer inherent stability at comparatively low costs. Therefore, we present a novel, compact gas measurement system using a static single-mirror Fourier transform spectrometer (sSMFTS). The system works in the mid-infrared range from 650 cm−1 to 1250 cm−1 and can be operated with a customized White cell, yielding optical path lengths of up to 120 cm for highly sensitive quantification of gas concentrations. To validate the system, we measure different concentrations of 1,1,1,2-Tetrafluoroethane (R134a) and perform a PLS regression analysis of the acquired infrared spectra. Thereby, the measured absorption spectra show good agreement with reference data. Since the system additionally permits measurement rates of up to 200 Hz and high signal-to-noise ratios, an application in process analysis appears promising.

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Section: Introductionmentioning

confidence: 99%