||Optimization of GC/FT-IR (Gas Chromatograph/Fourier Transform-Infrared) Measurements. 2. Optical Design.
Yang, P. W. J. ;
Griffiths, P. R. ;
||California Univ., Riverside. Dept. of Chemistry.;Environmental Research Lab., Athens, GA.
Gas chromatography ;
Design criteria ;
Fourier transformations ;
Infrared spectroscopy ;
Optical prisms ;
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Several optical designs for GC/FTIR have been investigated. It was found that reflection losses occurring in the light-pipe cause the solid angle of the emerging beam to be much smaller than that of the input beam. That property permits a very small image at the detector to be achieved since the collection mirror may be mounted well away from the end of the light-pipe. With an optical configuration of this sort, the effect of radiation emitted from the light-pipe saturating the response of the detector is also minimized. (Copyright (c) 1984 Society for Applied Spectroscopy.)