Effects of temporally changing sources on Fourier transform spectrometers

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Title: Effects of temporally changing sources on Fourier transform spectrometers
Author: Mitchell, Herbert; Hemmer, Terrance; Lewis, Paul; Salvaggio, Carl
Abstract: A Michelson Fourier Transform Spectrometer senses an object/material in the time domain, producing an interferogram. To produce a spectrum, the interferogram is Fourier transformed into the spectral domain. Unless filtering is applied to the interferogram, all the time changing (AC) components of the interferogram contribute to the resulting spectrum. Aperiodic signals are not easily removed from the interferogram and, when transformed, result in false spectral features. Possible sources of real-world aperiodic signals are discussed and their effects on the resulting transformed spectra are demonstrated. Mitigation and avoidance techniques for some of the more common real-world aperiodic signals are discussed.
Description: "Effects of temporally changing sources on Fourier transform spectrometers," Proceedings of the SPIE, Image Exploitation and Target Recognition, Algorithms for Multispectral, Hyperspectral, and Ultraspectral Imagery VII, Vol. 4381. The International Society of Optical Engineers. Held in Orlando, Florida: April 2001. This paper is made available as an electronic reprint with permission of SPIE. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
Record URI: http://hdl.handle.net/1850/4052
Date: 2001-04

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