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Proceedings Paper

Space Infrared Telescope Facility telescope overview
Author(s): Helene R. Schember; Paul K. Manhart; Cecilia N. Guiar; James H. Stevens
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Paper Abstract

The Space Infrared Telescope Facility (SIRTF) will be the first true infrared observatory in space, building upon the technical and scientific experience gained through its two NASA survey-oriented predecessors: the Infrared Astronomical Satellite and the Cosmic Background Explorer. During its minimum five year lifetime, the SIRTF will perform pointed scientific observations at wavelengths from 1.8 to 1200 microns with an increase in sensitivity over previous missions of several orders of magnitude. This paper discusses a candidate design for the SIRTF telescope, encompassing optics, cryostat, and instrument accommodation, which has been undertaken to provide a fulcrum for the development of functional requirements, interface definition, risk assessment and cost. The telescope optics employ a baffled Ritchey-Chretien Cassegrain system with a 1-m class primary mirror, an active secondary mirror, and a stationary facetted tertiary mirror. The optics are embedded in a large superfluid He cryostat designed to maintain the entire telescope-instrument system at temperatures below 3 K.

Paper Details

Date Published: 1 December 1991
PDF: 12 pages
Proc. SPIE 1540, Infrared Technology XVII, (1 December 1991); doi: 10.1117/12.48714
Show Author Affiliations
Helene R. Schember, Jet Propulsion Lab. (United States)
Paul K. Manhart, Jet Propulsion Lab. (United States)
Cecilia N. Guiar, Jet Propulsion Lab. (United States)
James H. Stevens, Jet Propulsion Lab. (United States)

Published in SPIE Proceedings Vol. 1540:
Infrared Technology XVII
Bjorn F. Andresen; Marija Scholl; Irving J. Spiro, Editor(s)

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