Evaluation of siliconic paint contamination effects on optical surfaces exposed to the space environment

Moshe Shiloh; Eitan Grossman; Yoram Noter; Yeshayahu Lifshitz

doi:10.1117/12.328506

27 October 1998 Evaluation of siliconic paint contamination effects on optical surfaces exposed to the space environment

Moshe Shiloh, Eitan Grossman, Yoram Noter, Yeshayahu Lifshitz

Author Affiliations +

Proceedings Volume 3427, Optical Systems Contamination and Degradation; (1998) https://doi.org/10.1117/12.328506
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1998, San Diego, CA, United States

Abstract

Outgassing products originating from white siliconic paint were deposited on optical surfaces. The contamination layer was then exposed to vacuum UV (VUV) radiation. The volatile fragments generated by the paint outgassing as well as the UV irradiation were studied using a residual gas analyzer. The VUV effect on the contamination layer was studied by measuring the etching rate, measuring changes in the chemical state and measuring degradation in the optical transparency by UV-VIS photospectroscopy. Compiling the data obtained from the various analytical techniques it was concluded that the main erosion mechanism was crosslinking of the siliconic polymer chains. The crosslinking behavior induced fixation of the contamination layer, caused 'crystallization' of its liquid like form and degradation in its optical transparency.

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Moshe Shiloh, Eitan Grossman, Yoram Noter, and Yeshayahu Lifshitz "Evaluation of siliconic paint contamination effects on optical surfaces exposed to the space environment", Proc. SPIE 3427, Optical Systems Contamination and Degradation, (27 October 1998); https://doi.org/10.1117/12.328506

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