Bruker Analytik Gmbh

Bruker Optik Gmbh

Wilfried Hartmann

Arno Simon

The invention concerns a method and a device for process control of reaction processes using Fourier transform infrared spectroscopy. In accordance with the invention, an interferogram is generated before or after interaction with the compositions. Subsequent thereto, the interferogram is inspected in segments for externally introduced intensity fluctuations. The intensity fluctuations are subjected to an analysis procedure involving integration, differentiation, or the like, and on the basis of this evaluation, a decision is made as to whether or not the interferogram has an acceptable degree of interfering signals. The interferogram is labeled with this evaluation result and the procedure is repeated a plurality of times. After a sufficient number of acceptable interferograms have been collected, the acceptable interferograms are summed and subjected to a Fourier transform process to extract the frequency dependence. In this manner, Fourier transformation infrared spectroscopy techniques can be applied for process control of processes which would otherwise be impossible due to unacceptably large degrees of interference caused primarily by bubble formation.

Method and apparatus for process control using fourier transform infrared spectroscopy

A device for infrared (IR) spectroscopic investigation of internal surfaces of a body, for example of blood vessels, comprising an endoscope (10) with light guide means to illuminate the surfaces is characterized in that at the distal end of the light guide means there is arranged a detector (12) for detecting IR light scattered from the illuminated surface and transforming it into electric signals. For otherwise identical conditions, compared to comparable known devices, the device according to the invention offers a higher signal strength and thereby the possibility to shorten the measuring time for equal signal quality.

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Halle/Saale, Germany

Wilfried Hartmann