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Proceedings Paper

The effect of out-gassing from commonly used spacecraft/space instrument materials on the UV-visible-IR reflectivity of optical surfaces
Author(s): Barry Y. Welsh; Sharon Jelinsky
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Paper Abstract

We present laboratory measurements of the reduction in UV-to-visible/IR reflectivity (1200Å - 10,000Å) of optical surfaces due to 50Å - 500Å deposited layers of out-gassed molecular contaminants from 9 commonly used spacecraft/space instrument materials that include Apiezon-L hi-vacuum grease, Braycote-601EF lubricant, DC 704 silicon oil, EPOM rubber clad wire, PVC clad wire, Scotchweld 2216 epoxy, Uralane 5753 staking compound, Tefzel cable tie and Aeroglaze Z306 black paint on Kapton. Our results are compared with predictions from theoretical models currently being widely used throughout the space industry. Good agreement is found at UV wavelengths, but large differences occur at visible wavelengths. This latter effect is due to the application of Beer's Law, which ignores the non-negligible effect of reflectance scattering from the thin film of the contaminant.

Paper Details

Date Published: 30 August 2005
PDF: 8 pages
Proc. SPIE 5897, Photonics for Space Environments X, 58970B (30 August 2005); doi: 10.1117/12.614178
Show Author Affiliations
Barry Y. Welsh, UC Berkeley (United States)
Sharon Jelinsky, UC Berkeley (United States)

Published in SPIE Proceedings Vol. 5897:
Photonics for Space Environments X
Edward W. Taylor, Editor(s)

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