Baffle system employing reflective surfaces

Details Baffle system employing reflective surfaces Baffle system employing reflective surfaces

Dec 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983bser.rept.....l&link_type=abstract

Unknown

Physics

Baffles, Infrared Telescopes, Solar Reflectors, Space Shuttle Payloads, Cones, Space Infrared Telescope Facility, Thermal Protection, Toroids

Scientific paper

Reflective baffles are proposed to reject off-axis light entering a telescope. Toroidal surfaces and adjacent cones are positioned so that off-axis rays make multiple reflections between these two surfaces. Meridional rays are reflected approximately parallel to the entering direction. Skew rays are reflected obliquely, but leave the telescope aperture. The range of incident angles for which these reflections are obtained is approximately 45 deg. A system is described that is designed specifically for the Space Shuttle Infrared Telescope Facility (SIRTF). Because of its reflective properties, the proposed baffle system rejects about 90 deg of the heat load from the SIRTF sunshade that would be absorbed in systems of conventional black baffles.

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