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Optical Engineering

Infrared image scintillation: comparison of modeling and measurement
Author(s): Ingmar G. E. Renhorn; Thomas Svensson; Göran Carlsson; Staffan Cronström; Glenn David Boreman
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Paper Abstract

Atmospheric scintillation effects on point targets and small targets are studied in the middle-wave infrared (MWIR) band over a 2.5-km horizontal path. Expressions are presented for both exact numerical calculations and for a Gaussian-aperture approximation of scintillation that has an accurate analytic solution. Experimental results show that measurements of Cn2 using a commercial NIR scintillometer allow the prediction of average scintillation levels in the MWIR when corrections are made for wavelength and dimensions of the source and receiver. The measured log-irradiance values are approximately lognormal, and are about a factor of 2 higher than would have been expected from theory. Our results are relevant for analysis of detection and false-alarm probabilities over long horizontal paths in the MWIR.

Paper Details

Date Published: 1 January 2006
PDF: 9 pages
Opt. Eng. 45(1) 016001 doi: 10.1117/1.2158976
Published in: Optical Engineering Volume 45, Issue 1
Show Author Affiliations
Ingmar G. E. Renhorn, Swedish Defence Research Agency (Sweden)
Thomas Svensson, Swedish Defence Research Agency (Sweden)
Göran Carlsson, Swedish Defence Research Agency (Sweden)
Staffan Cronström, Swedish Defence Research Agency (Sweden)
Glenn David Boreman, College of Optics and Photonics/Univ. of Central Florida (United States)

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