Physics – Optics
Scientific paper
Jan 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987spie..751...29b&link_type=abstract
IN: Reflective optics; Proceedings of the Meeting, Los Angeles, CA, Jan. 15, 16, 1987 (A88-34536 13-74). Bellingham, WA, Society
Physics
Optics
1
Geosynchronous Orbits, Infrared Telescopes, Spaceborne Telescopes, Structural Design, Thermal Analysis, Aberration, Nastran, Near Infrared Radiation
Scientific paper
The structural and thermal behavior of a ten-meter primary mirror for a space optical/near-IR telescope in geosynchronous orbit is studied. The glass-type lightweighted mirror is monolithic, of the double arch type, and is supported at only three points. The computer programs SSPTA (thermal), NASTRAN (finite element), and ACCOS V (optical) are used in sequence to determine the temperature, deformation, and optical performance of the mirror. A mirror temperature of 130 K or less appears to be obtainable by purely passive means. With a fused silica or standard Zerodur blank, thermally-induced deformation is unacceptable and cannot be fully corrected by an active secondary mirror over the desired field. Either active thermal control or a blank of lower thermal expansion coefficient would be required.
Bely Pierre-Yves
Bolton John F.
Neeck Steven P.
Tulkoff Philip J.
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