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- W1972029213 abstract "The SIRTF optics are intended for operation at 20°K (or less); it will be extremely inconvenient, expensive, and time consuming if it becomes necessary to accomplish all of the optical element testing, assembly, and alignment at comparable temperatures. The thermal strain behavior, including potential anisotropies and inhomogeneities, of a mirror substrate between room temperature and 20°K thus becomes a major factor in the selection of the substrate material, structural configuration, and joining methods for lightweight structures. With support from Space Projects, NASA Ames Research Center, Itek Optical Systems is executing an optical figure evaluation of a 0.65-meter, lightweight, fused silica mirror at a low-temperature goal of 20°K. The design details of a thermal shroud, provisions for extracting heat from the low-conductivity mirror, and wavefront error sources other than the mirror surface are discussed and preliminary test results presented." @default.
- W1972029213 created "2016-06-24" @default.
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- W1972029213 date "1983-08-16" @default.
- W1972029213 modified "2023-09-23" @default.
- W1972029213 title "<title>Fused Silica Mirror Evaluation For The Shuttle Infrared Telescope Facility (SIRTF)</title>" @default.
- W1972029213 doi "https://doi.org/10.1117/12.934188" @default.
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