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High-resolution, non-scanning FTS for remote sensing

Published online by Cambridge University Press:  12 April 2016

K. Døhlen  and
A. Cañas
K. Døhlen
Affiliation:
The Blackett Laboratory, Imperial College of Science and Technology, London SW7, UK
A. Cañas
Affiliation:
The Blackett Laboratory, Imperial College of Science and Technology, London SW7, UK

Abstract

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We present the first results from a portable spectrometer for the visible and very near infrared based upon the principle of heterodyned holographic Fourier transform spectroscopy (HHS) (Dohi and Suzuki 1971, Dohlen 1994). The instrument uses a Michelson interferometer where one of the mirrors is replaced with a grating. This produces a spatially located, frequency-shifted interferogram which is read out by an all-reflective relay lens and a photo-diode array and processed on a portable PC. A battery pack ensures an autonomy of about 7 hours. Instrumental assets include high optical throughput, variable resolving power, and no moving parts.

We have successfully used the instrument in two different remote sensing applications: detection of vegetation reflectance and atmospheric absorption.

Type
4. Fourier Transform Spectroscopy
Information
International Astronomical Union Colloquium , Volume 149: Tridimensional Optical Spectroscopic Methods in Astrophysics , 1995 , pp. 338 - 339
Copyright
Copyright © Astronomical Society of the Pacific 1995

References

Dohi, T. and Suzuki, T. 1971, Appl.Optics, 10, 1137 CrossRefGoogle Scholar
Døhlen, K. 1994, Ph.D. Thesis, University of London Google Scholar
Horler, D., Dockray, M., and Barber, J. 1983, Int. J. Remote Sens., 4, 273 CrossRefGoogle Scholar
Woods, P. and Jolliffe, B. 1978, Optics and Laser Techn., 1978, p. 25 CrossRefGoogle Scholar