Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Phase determination for a Fourier transform infrared spectrometer in emission mode

Not Accessible

Your library or personal account may give you access

Abstract

Beam-splitter emission strongly influences the spectra measured with a Fourier transform spectrometer (FTS) as it affects the entire phase behavior, in particular in emission spectroscopy. The various radiation contributions of the scene and the FTS itself have different phases in the complex spectrum. As a specific feature, the radiation of the beam splitter is rotated by approximately π∕2 relative to the scene effective radiation. By classical methods of phase correction, the radiation components of different phases are mixed in the complex plane, which may lead to serious errors in the calibrated spectra. For this reason, the nature of the FTS phase has been studied, and a statistical phase determination method has been developed. It allows us to determine the phase function of the scene by minimizing the correlation between the imaginary and the real parts of the complex spectrum and by reducing the variance of the imaginary part. Thus phase accuracies of 10 to 30 mrad can be achieved. In addition, the remaining error of the phase can be calculated for each individual spectrum. The total phase error and its effect on the spectra are discussed.

© 2007 Optical Society of America

Full Article  |  PDF Article
More Like This
Effects of the self-emission of an IR Fourier-transform spectrometer on measured absorption spectra

J. Schreiber, T. Blumenstock, and H. Fischer
Appl. Opt. 35(31) 6203-6209 (1996)

Measurement of surface temperature and emissivity by a multitemperature method for Fourier-transform infrared spectrometers

Sønnik Clausen, Axel Morgenstjerne, and Ole Rathmann
Appl. Opt. 35(28) 5683-5691 (1996)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (7)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (44)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved