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Proceedings Paper

Front Surface Optic Contamination From Small Rocket Plumes
Author(s): John Lester Miller; Gerard Steiner; Eugene Dryden
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Paper Abstract

Optics contamination from small Hydrazine, Al fueled solid, and BeH2/HAP rocket plumes is assessed for space based infrared sensors. Model predictions of BDRF and sensor level degradation caused by erosion cratering and gas condensation are presented as a function of area cratered and film thickness. The resulting reduction in sensor level S/N is determined and expressed as a percentage. Results for the case considered indicate mirror pitting is less than 2% of the clear optical area and film flux is 0.01 g/cm2/sec. The result for 250° K optics is a LWIR reduction in S/N of15`)/0 and a MWIR S/N reduction of 8%. This provides for sufficient sensor operation depending on whether the optics is originally sized to account for this degradation. These results are compared to limited laboratory tests.

Paper Details

Date Published: 5 April 1989
PDF: 12 pages
Proc. SPIE 0967, Stray Light and Contamination in Optical Systems, (5 April 1989); doi: 10.1117/12.948117
Show Author Affiliations
John Lester Miller, Martin Marietta (United States)
Gerard Steiner, Martin Marietta (United States)
Eugene Dryden, Aerojet ElectroSystems (United States)

Published in SPIE Proceedings Vol. 0967:
Stray Light and Contamination in Optical Systems
Robert P. Breault, Editor(s)

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