1 September 1991 Infrared Space Observatory optical subsystem
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Abstract
The paper discusses the Infrared Space Observatory (ISO) optical subsystem, a cryogenically cooled telescope featuring main baffle and sunshade. The telescope, a 60-cm Ritchey-Chretien type, focuses the beam to the four scientific instruments located in its focal plane. The extremely low temperature, 1.8 K, is provided by the payload module cryostat, filled with superfluid He. The design of these elements is supported by different mathematical models and by dedicated elementary tests linked to operation in the cryogenic environment. Tests performed at ambient and cryogenic temperatures demonstrate the good behavior of the optical subsystems for thermal, mechanical, and optical performance.
© (1991) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Christian Singer, Jean Alain Massoni, Bernard Mossbacher, Ciro Cinotti, "Infrared Space Observatory optical subsystem", Proc. SPIE 1494, Space Astronomical Telescopes and Instruments, (1 September 1991); doi: 10.1117/12.46729; https://doi.org/10.1117/12.46729
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