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Proceedings Paper

Calculation of spectral degradation due to contaminant films on infrared and optical sensors
Author(s): Lara Gamble; J. R. Dennison; Bob E. Wood; James J. Herrick; James S. Dyer
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Paper Abstract

Molecular surface contaminants can cause degradation of optical systems, especially if the contaminants exhibit strong absorption bands in the region of interest. Different strategies for estimation of spectral degradation responses due to uniform films for various types of systems are reviewed. One tool for calculating the effects of contaminant film thickness on signal degradation in the mid IR region is the simulation program CALCRT. The CALCRT database will be reviewed to correlate spectral n and k values associated with specific classes of organic functional groups. Various schemes are also investigated to estimate the spectral degradation in the UV-Vis region. Experimental measurements of reflectance changes in the IR to UV-Vis regions due to specific contaminants will be compared. Approaches for estimating changes in thermal emissivity and solar absorptivity will also be discussed.

Paper Details

Date Published: 11 September 2002
PDF: 8 pages
Proc. SPIE 4774, Optical System Contamination: Effects, Measurements, and Control VII, (11 September 2002); doi: 10.1117/12.481667
Show Author Affiliations
Lara Gamble, Utah State Univ. (United States)
J. R. Dennison, Utah State Univ. (United States)
Bob E. Wood, Bob Wood Aerospace Consulting Services, Inc. (United States)
James J. Herrick, Utah State Univ. (United States)
James S. Dyer, Utah State Univ. (United States)

Published in SPIE Proceedings Vol. 4774:
Optical System Contamination: Effects, Measurements, and Control VII
Philip T. C. Chen; O. Manuel Uy, Editor(s)

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