The 3.5-m all-SiC telescope for HERSCHEL

Yves Toulemont; Thomas Passvogel; Goran L. Pilbratt; Daniel de Chambure; Dominique Pierot; Didier Castel

doi:10.1117/12.551616

12 October 2004 The 3.5-m all-SiC telescope for HERSCHEL

Yves Toulemont, Thomas Passvogel, Goran L. Pilbratt, Daniel de Chambure, Dominique Pierot, Didier Castel

Proceedings Volume 5487, Optical, Infrared, and Millimeter Space Telescopes; (2004) https://doi.org/10.1117/12.551616
Event: SPIE Astronomical Telescopes + Instrumentation, 2004, Glasgow, United Kingdom

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).

Citation Download Citation

Yves Toulemont, Thomas Passvogel, Goran L. Pilbratt, Daniel de Chambure, Dominique Pierot, and Didier Castel "The 3.5-m all-SiC telescope for HERSCHEL", Proc. SPIE 5487, Optical, Infrared, and Millimeter Space Telescopes, (12 October 2004); https://doi.org/10.1117/12.551616

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