A low-resolution spectrometer for open-path Fourier-transform infrared spectrometry

A novel open-path Fourier-transform infrared (OP-FTIR) spectrometer has bee n designed and constructed. The spectrometer differs from conventional OP-F TIR spectrometers in that it uses a low-resolution interferometer and a deu terated h-alanine-doped triglycine sulfate detector. The system also incorp orates separate transmitting and receiving telescopes, the mirrors of which are fabricated from spin-cast epoxy resin, and a lateral transfer hollow r etroreflector. The use of these components allows for a lighter, more rugge d and robust system that can easily be employed for remote sensing/continuo us monitoring for both outdoor (fence line or traditional) and indoor envir onments. Advantages over contemporary instruments were found in weight, cos t, and utility, (C) 1999 John Wiley & Sons, Inc.