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Proceedings Paper

Pre-launch testing and evaluation of typical mirror coatings for space optical instruments
Author(s): James B. Heaney; Lonny R. Kauder; Scott C. Freese; Manuel A. Quijada
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Paper Abstract

Pre-launch acceptance testing and evaluation of mirrors coated for use in space are almost never performed on the actual flight mirror. Smaller witness mirrors, coated at the same time as the flight component, are used as test proxies for the spaceflight component. The intent of the acceptance testing is generally aimed at identifying any mirror surface quality problems before the larger mirror experiences qualification testing that usually occurs at the assembled instrument level when recovery from a previously undetected flaw can be costly. Only in rare cases will the testing of a smaller proxy sample reveal a mirror’s substrate structural flaws. This presentation will discuss details associated with pre-launch radiation sensitivity and cryogenic acceptance testing of the commonly used mirror reflector coatings aboard space optical instruments. The sufficiency of reflectance and transmittance measurements as the primary diagnostic tool for evaluating mirror coating quality, and as a predictor of on-orbit performance, will be emphasized with reference to specific space missions.

Paper Details

Date Published: 15 October 2012
PDF: 11 pages
Proc. SPIE 8492, Optical System Contamination: Effects, Measurements, and Control 2012, 849206 (15 October 2012); doi: 10.1117/12.964693
Show Author Affiliations
James B. Heaney, SGT, Inc. (United States)
Lonny R. Kauder, SGT, Inc. (United States)
Scott C. Freese, SGT, Inc. (United States)
Manuel A. Quijada, NASA Goddard Space Flight Ctr. (United States)

Published in SPIE Proceedings Vol. 8492:
Optical System Contamination: Effects, Measurements, and Control 2012
Sharon A. Straka; Nancy Carosso; Joanne Egges, Editor(s)

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