Physics
Scientific paper
Aug 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992spie.1693..296a&link_type=abstract
In: Surveillance technologies II; Proceedings of the Meeting, Orlando, FL, Apr. 21-23, 1992 (A93-29980 11-19), p. 296-303.
Physics
Flexible Bodies, Silicon Carbides, Spaceborne Telescopes, Structural Stability, Thermal Stability, Aerospace Environments, Environmental Tests, Operating Temperature, Spacecraft Launching, Thermodynamic Properties, Trusses
Scientific paper
A critical technology area for lightweight SiC-based telescope systems is the structural integrity and thermal stability over spaceborne environmental launch and thermal operating conditions. Note, it is highly desirable to have an inherently athermal design of both SiC mirrors and structure. SSG has developed an 8 inch diameter SiC telescope system for brassboard level optical and thermal testing. The brassboard telescope has demonstrated less than 0.2 waves P-V in the visible wavefront change over +50 C to -200 C temperature range. SSG has also fabricated a SiC truss structural assembly and successfully qualified this hardware at environmental levels greater than 3 times higher than normal Delta, Titan, and ARIES launch loads. SSG is currently developing two SiC telescopes; an 20 cm diameter off-axis 3 mirror re-imaging and a 60 cm aperture on-axis 3 mirror re-imager. Both hardware developments will be tested to flight level environmental, optical, and thermal specifications.
Anapol Michael I.
Hadfield Peter
Tucker Theodore
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