Physics – Optics
Scientific paper
Oct 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995spie.2543..180r&link_type=abstract
Proc. SPIE Vol. 2543, p. 180-184, Silicon Carbide Materials for Optics and Precision Structures, Mark A. Ealey; Ed.
Physics
Optics
Scientific paper
The next generation of space-borne optical sensor will have to meet tight weight limitation, in order to be viable on smaller, less expensive, launch platforms, while supporting a wide range of mission scenarios. Wide spectral coverage, near-diffraction limited visible quality performance, and increased thermal and structural stability are becoming important features for future space-hardware. SiC represents an emerging technology which is gaining wider acceptance as the leading candidate for the next generation of space flight hardware. As a material for all-reflective flight telescopes and optical benches, SiC offers: the lightweight and stiffness characteristics of beryllium; glass-like inherent stability consistent with visible quality performance levels; superior thermal properties down to cryogenic temperatures and in the presence of large thermal gradients; and an existing, commercially based material and processing infrastructure like aluminum. This paper describes an all-SiC off-axis, three mirror anastigmatic telescope system which promises to meet these stressing technical requirements. The system described maintains a 35 cm entrance aperture with a weight of 14 kgs.
Anapol Michael I.
Gardner Leonard Robert
Hadfield Peter
Robichaud Joseph L.
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