Influence of apodization functions on continuous very far infrared spectra

We show that the continuous transmission spectrum and continuous absorption coefficient in the VFIR region ( K < 50 cm −1) are distorted by all the weighting functions employed in the process of apodization, when using a Michelson interferometer. We observed that the most common triangular weight...

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Bibliographic Details
Published inInfrared physics Vol. 25; no. 4; pp. 655 - 657
Main Authors Rivas, F.Chávez, Laurant, J.M.
Format Journal Article
LanguageEnglish
Published Seoul Elsevier B.V 01.01.1985
Oxford Pergamon Press
New York, NY
Subjects
Exact sciences and technology
Infrared, submillimeter wave, microwave and radiowave instruments, equipment and techniques
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Physics
Resolving power
Disordered system
Distortion
Data processing
Absorptance
Transmittance
Solid
Far infrared radiation
Infrared spectrometry
Weighting
Smoothing
Continuous spectrum
Michelson interferometer
Apodization
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Summary:We show that the continuous transmission spectrum and continuous absorption coefficient in the VFIR region ( K < 50 cm −1) are distorted by all the weighting functions employed in the process of apodization, when using a Michelson interferometer. We observed that the most common triangular weighting function distorts considerably the FIR spectrum. We found that the weighting function [1- (Δ 2/Δ 2 max)] is more appropriate for smoothing the spectrum.
ISSN:0020-0891
DOI:10.1016/0020-0891(85)90022-3