Abstract

This paper discusses how the intrinsic background radiation of a Fourier spectroradiometer affects the results of the processing of two-sided interferograms. The operation of a Michelson interferometer is considered theoretically, and it is shown that, when objects with radiance temperatures close to the intrinsic temperature of the spectrometer are observed, inverted spectral sections and bands may appear in the final spectrum. The paper proposes an algorithm for correcting the initial interferograms and an experimental technique that makes it possible to eliminate the inversion of the spectrum and to compensate the intrinsic background radiation of the interferometer.

Portable Fourier transform infrared spectroradiometer for field measurements of radiance and emissivity

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New Fourier Transform All-Reflection Interferometer

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Phase discrepancies in asymmetric interferograms and application to nonlinearities in Fourier spectroscopy

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J. Opt. Soc. Am. 65(7) 825-828 (1975)

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Passive Fourier-transform infrared spectroscopy of chemical plumes: an algorithm for quantitative interpretation and real-time background removal

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