| タイトル | Surface Figure Measurement of Silicon Carbide Mirrors at Cryogenic Temperatures |
| 本文（外部サイト） | http://hdl.handle.net/2060/20050244863 |
| 著者（英） | Chambers, John; Mink, Ronald G.; Robinson, F. David; Content, David; Davila, Pamela; Blake, Peter |
| 著者所属（英） | NASA Goddard Space Flight Center |
| 発行日 | 2005-01-01 |
| 言語 | eng |
| 内容記述 | The surface figure of a developmental silicon carbide mirror, cooled to 87 K and then 20 K within a cryostat, was measured with unusually high precision at the Goddard Space Flight Center (GSFC). The concave spherical mirror, with a radius of 600 mm and a clear aperture of 150 mm, was fabricated of sintered silicon carbide. The mirror was mounted to an interface plate representative of an optical bench, made of the material Cesic@, a composite of silicon, carbon, and silicon carbide. The change in optical surface figure as the mirror and interface plate cooled from room temperature to 20 K was 3.7 nm rms, with a standard uncertainty of 0.23 nm in the rms statistic. Both the cryo-change figure and the uncertainty are among the lowest such figures yet published. This report describes the facilities, experimental methods, and uncertainty analysis of the measurements. |
| NASA分類 | Optics |
| 権利 | No Copyright |
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