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Proceedings Paper

The 3.5-m all-SiC telescope for HERSCHEL
Author(s): Yves Toulemont; Thomas Passvogel; Goran L. Pilbratt; Daniel de Chambure; Dominique Pierot; Didier Castel
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Paper Abstract

Placed on the L2 Lagrangian point, Herschel operates in the spectral range between 80 and 670 μm wavelength and is devoted to astronomical investigations in the far-infrared, sub-millimetre and millimetre wavelengths. The Herschel Telescope is an "all Silicon Carbide" Telescope, based on a 3.5-m-diameter Cassegrain design. The driving requirements are the large diameter (3;5m) which represents a manufacturing challenge, the WFE to be kept below 6μrms despite the operational temperature of 70K, and finally the mass to be kept below 300kg. The size of the Telescope has put some challenges in the manufacturing processes and the tests facilities installations. At this stage, the major critical phases which are the brazing and the grinding of the primary mirror have successfully been passed. The development and manufacturing of the Herschel Telescope is part of the Herschel Planck program funded by the European Space Agency (ESA).

Paper Details

Date Published: 12 October 2004
PDF: 10 pages
Proc. SPIE 5487, Optical, Infrared, and Millimeter Space Telescopes, (12 October 2004); doi: 10.1117/12.551616
Show Author Affiliations
Yves Toulemont, EADS-Astrium, Ltd. (France)
Thomas Passvogel, ESTEC (Netherlands)
Goran L. Pilbratt, ESTEC (Netherlands)
Daniel de Chambure, ESTEC (Netherlands)
Dominique Pierot, EADS-Astrium, Ltd. (France)
Didier Castel, EADS-Astrium, Ltd. (France)

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

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