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Proceedings Paper

The 3.5-m all-SiC telescope for SPICA
Author(s): Yves Toulemont; Jacques Breysse; Dominique Pierot; Emmanuel Sein; Takao Nakagawa; Hidehiro Kaneda; Takashi Onaka; Masayuki Hirabayashi; Katsuhiro Narasaki; Hironobu Sakuta; Shinji Miura
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Paper Abstract

Placed on the L2 Lagrangian point, the Space Infrared Telescope for Cosmology and Astrophysics (SPICA) will operate in the 5 to 200 μm wavelength range, at 4.5K. The large aperture telescope (3.5m diameter in a single piece) requires a strong manufacturing mastering, associated with high technical performances. The background acquired by EADS-Astrium (France) on the 3.5m Silicone Carbide Herschel Telescope is a key for the success of the SPICA development. EADS-Astrium has been awarded by the Japan Aerospace Exploration Agency (JAXA) and Sumitomo Heavy Industries to assess the feasibility of the 3.5m all SiC telescope through a design phase contract. The Telescope driving requirements are the large diameter of 3.5m especially critical for the manufacturing aspects, and the Wave Front Error which has to be kept below 350nm rms over a large temperature range from ambient to the operational temperature of 4.5K which requires a strong mastering of the distortions.

Paper Details

Date Published: 12 October 2004
PDF: 12 pages
Proc. SPIE 5487, Optical, Infrared, and Millimeter Space Telescopes, (12 October 2004); doi: 10.1117/12.551405
Show Author Affiliations
Yves Toulemont, EADS-Astrium, Ltd. (France)
Jacques Breysse, EADS-Astrium, Ltd. (France)
Dominique Pierot, EADS-Astrium, Ltd. (France)
Emmanuel Sein, EADS-Astrium, Ltd. (France)
Takao Nakagawa, Japan Aerospace Exploration Agency (Japan)
Hidehiro Kaneda, Japan Aerospace Exploration Agency (Japan)
Takashi Onaka, Univ. of Tokyo (Japan)
Masayuki Hirabayashi, Sumitomo Heavy Industries, Ltd. (Japan)
Katsuhiro Narasaki, Sumitomo Heavy Industries, Ltd. (Japan)
Hironobu Sakuta, Nikon Corp. (Japan)
Shinji Miura, Nikon Corp. (Japan)

Published in SPIE Proceedings Vol. 5487:
Optical, Infrared, and Millimeter Space Telescopes
John C. Mather, Editor(s)

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