Procedures for infrared spectroscopy.
Three procedures are described: a modified Pfund triple-pass absorption cell; an improved image slicer; and new achromatic, doublet lenses. Design parameters for prism dispersion for various prism angles-both simple and composite prisms-are displayed by graphs. The relationships of dispersion and transmission are useful in designing prism spectrometers, predispersion systems for grating spectrometers, and LN-2 cooled predispersion systems for use with helium-cooled detectors. In combination with a suitable chopper they provide instrumentation suited to a study of the validity of the Lorentz line shape.
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