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12 October 2004 Development of space infrared telescope for the SPICA mission
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The SPICA (Space Infrared Telescope for Cosmology and Astrophysics), which is a Japanese astronomical infrared satellite project with a 3.5-m telescope, is scheduled for launch in early 2010s. The telescope is cooled down to 4.5 K in space by a combination of mechanical coolers with an efficient radiative cooling system. The SPICA telescope has requirements for its total weight to be lighter than 700 kg and for the imaging performance to be diffraction-limited at 5 µm at 4.5 K. Two candidate materials, silicon carbide (SiC) and carbon-fiber-reinforced SiC (C/SiC composite), are currently under investigation for the primary mirror. A monolithic mirror design will be adopted in both cases because of the technical feasibility and reliability. This paper reports the current design and status of the SPICA telescope together with some of our recent results on laboratory cryogenic tests for the SiC and C/SiC composite mirrors.
© (2004) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Hidehiro Kaneda, Takao Nakagawa, Takashi Onaka, Toshio Matsumoto, Hiroshi Murakami, Keigo Enya, Hirokazu Kataza, Hideo Matsuhara, and Yukari Yamashita Yui "Development of space infrared telescope for the SPICA mission", Proc. SPIE 5487, Optical, Infrared, and Millimeter Space Telescopes, (12 October 2004);

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