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Proceedings Paper

An Atmospheric Limit On Submillimeter Wave Imaging: Observations Of High Visibility Fringes
Author(s): G. A. Tanton; R. L. Morgan; W. G. Otten; J. G. Castle
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Paper Abstract

Measurements have been made on the Redstone Arsenal Submillimeter Wave range of weather related changes in the coherence within a transmitted laser beam whose wavelength is 1.2 mm and divergence is less than five milliradians. Our experimental techniques, variations of a Michelson interferometer, are described in brief. Our preliminary observations of rapid fluctuations superposed on high visibility fringes are discussed in terms of local fluctuations in the complex index of refraction of the near ground atmosphere, as treated theoretically by Armand et al. For our beam geometry, a limit to the observed fringe visibility appears to be set by local fluctuations in the real part of the complex index of refraction.

Paper Details

Date Published: 27 February 1981
PDF: 6 pages
Proc. SPIE 0259, Millimeter Optics, (27 February 1981); doi: 10.1117/12.959652
Show Author Affiliations
G. A. Tanton, U.S. Army Missile Command (United States)
R. L. Morgan, U.S. Army Missile Command (United States)
W. G. Otten, U.S. Army Missile Command (United States)
J. G. Castle, University of Alabama in Huntsville (United States)

Published in SPIE Proceedings Vol. 0259:
Millimeter Optics
George A. Tanton, Editor(s)

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