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- W2017170998 abstract "Spaceborne optical systems designed for long-duration missions are susceptible to degradation from contaminants in the spacecraft environment. In order to assess contamination build-up rates and corresponding scatter changes, we have designed a BRDF measurement system for use in a high-vacuum (10-8 Torr), low-temperature (20K) environment. The system measures cryocooled optics at angles from near-specular (< 1°) to approximately 30° off-axis, at wavelengths of 0.633 and 10.6 microns. We describe the design characteristics of the instrument, and discuss preliminary experiments which demonstrate contamination build-up correlated with changes in the sample BRDF profiles. The current status of the instrument is reviewed and future plans and applications summarized." @default.
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- W2017170998 date "1990-01-02" @default.
- W2017170998 modified "2023-10-05" @default.
- W2017170998 title "Vacuum BRDF Measurements Of Cryogenic Optical Surfaces" @default.
- W2017170998 doi "https://doi.org/10.1117/12.962863" @default.
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