Physics – Optics
Scientific paper
Jul 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992ssrv...61..211h&link_type=abstract
Space Science Reviews (ISSN 0038-6308), vol. 61, no. 1-2, p. 211-232.
Physics
Optics
1
Infrared Astronomy Satellite, Infrared Space Observatory (Iso), Infrared Telescopes, Space Infrared Telescope Facility, Spaceborne Telescopes, Background Radiation, Cassegrain Optics, Field Of View, Temperature Gradients, Thermal Emission
Scientific paper
An optical design study for a next generation infrared space telescope has been performed. The concept is that of a passively cooled telescope of minimum aperture 2.5 m with an F/1.2 primary and wavelength coverage from 2 to as least 40 microns, and possibly to 100 microns. Compactness, low thermal emission from the optics and structure, diffraction limited imaging at 2 microns, and sensitivity to misalignment aberrations and manufacturing errors were the main considerations for this study. Ray tracing results are presented showing the characteristics of the various designs considered. A preliminary investigation of stray light properties is also given. Special emphasis has been placed on the testing of such a fast primary, and optical systems using a lateral shearing interferometer are described for testing both the primary and the primary/secondary combination.
Ettedgui-Atad Eli
Harris Jeff. W.
Humphries Colin M.
Nevo Yitzhak
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