Radiometric Applications of Fourier-Transform Spectrometers

Abstract

The relative spectral response of a filter radiometer, centred at 800 nm, has been measured with a Fourier-transform (FT) spectrometer, using a trap detector as the reference detector. Comparison with high accuracy laser spectrophotometric measurements gives agreement at the 1–2% level, and has demonstrated the viability of the technique for the measurement of filter radiometers, as well as the principle of characterizing FT instruments with a standard detector. FT spectrometers have therefore been shown to have potential uses in the characterization of radiometric detector (and source) transfer standards.