Contamination Induced Degradation Of Optical Solar Reflectors In Geosynchronous Orbit

Daryl L. Mossman; Hosea D. Bostic; Jesus R. Carlos

doi:10.1117/12.967062

1 January 1987 Contamination Induced Degradation Of Optical Solar Reflectors In Geosynchronous Orbit

Daryl L. Mossman, Hosea D. Bostic, Jesus R. Carlos

Proceedings Volume 0777, Optical Systems Contamination: Effects, Measurement, Control; (1987) https://doi.org/10.1117/12.967062
Event: 1987 Technical Symposium Southeast on Optics, Electro-Optics, and Sensors, 1987, Orlando, FL, United States

Abstract

Siloxane contaminated second-surface-mirrors were exposed to the geosynchronous solar environment and to laboratory irradiation designed to simulate the solar environment. Af-ter two an one-half years of space exposure, the solar absorptance (as) of the contami-nated (600Å) mirrors has almost tripled (Aas=0.145). Ge9synchron9us results show that doubling the siloxane film thickness from 300 angstrom (A) to 600Å produced as values greater by only 40%, suggesting that a major portion of the solar radiation is absorbed in the external 300Å thick layer. To compare with flight data and calibrate our production facility, samples were irradiated in 10-6 torr vacuum with 10 KEV electrons and radiation from two ultraviolet sources: a krypton lamp at 123.6nm, and a deuterium lamp at 180 - 450 nm. Accelerated lab results are similar to the on-orbit data, and verify that the geo-synchronous solar environment can be simulated for a given type and thickness of contaminant.

Citation Download Citation

Daryl L. Mossman, Hosea D. Bostic, and Jesus R. Carlos "Contamination Induced Degradation Of Optical Solar Reflectors In Geosynchronous Orbit", Proc. SPIE 0777, Optical Systems Contamination: Effects, Measurement, Control, (1 January 1987); https://doi.org/10.1117/12.967062

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available