Long-duration exposure facility: Preliminary observations of the effects of low Earth orbit on MgF2, ThF4 and SiO2 optical materials
| Autor: | P. J. John, A. E. Day, T. M. Trumble, T. W. Haas |
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| Rok vydání: | 1993 |
| Předmět: |
business.industry
Mineralogy Surfaces and Interfaces General Chemistry Condensed Matter Physics Surfaces Coatings and Films chemistry.chemical_compound Optics Optical coating chemistry Impact crater Low earth orbit X-ray photoelectron spectroscopy Optical materials Materials Chemistry business Fluoride Short duration Space environment |
| Zdroj: | Surface and Interface Analysis. 20:531-534 |
| ISSN: | 1096-9918 0142-2421 |
| DOI: | 10.1002/sia.740200608 |
| Popis: | Nomarski photography and x-ray photoelectron spectroscopy have been applied to the study of the effects of low Earth orbit on MgF 2 , ThF 4 and SiO 2 optical coatings. These sample coatings were part of NASA's Long Duration Exposure Facility (LDEF), which flew in low Earth orbit for nearly 6 years Numerous craters, cracks and other artifacts of the space environment were observed. Oxidation of the fluoride films was also noted |
| Databáze: | OpenAIRE |
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