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Design And Fabrication Of Reflective Optical Systems For Space And Tactical Flight Applications

Reflective optical systems have been developed at SSG, Inc. to satisfy a wide range of spaceborne and tactical flight applications. The key mission requirements and performance goals which dictate reflective optical designs include wide spectral coverage for multi-wavelength operation; high straylight rejection; proper exit pupil location to permit a high degree of coldshielding for improved sensitivity; cryogenic operation; and inherent athermalization under harsh flight environments. Eight telescopes that have been designed and fabricated are reviewed. These telescopes have been designed and flown on various launch platforms including rockets, the space shuttle, satellites, and aircraft. This paper will also review the SPIRIT III reflective telescope being developed for the Midcourse Space Experiment for a satellite application. The selection process of the above designs will be reviewed based on mission and sensor requirements.