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Proceedings Paper

EUCLID: design, analysis, fabrication, and test of a 1.3 m collimator for the on-ground characterization of the EUCLID payload module
Author(s): Olivier Pirnay; Grégory P. Lousberg; Virgile Monamy; Pierre Gloesener; Katja Rieth; Fabien Lemagne; Grégoire Réaud; Carlo Flebus
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Paper Abstract

EUCLID is an optical/near-infrared survey mission to be launched towards the L2 Lagrange point. It will aim at studying the dark universe and providing a better understanding of the origin of the accelerating expansion of the universe. Through the use of cosmological sounding, it will investigate the nature of dark energy, dark matter and gravity by tracking their observational signatures on the geometry of the universe and on the cosmic history of large structures formation. The EUCLID PayLoad Module (PLM) consists of a 1.2 m-class telescope and will accommodate two instruments. As a subcontractor of AIRBUS Defence and Space, AMOS is responsible for the manufacturing of all the silicon carbide mirrors of EUCLID PLM except for the primary mirror. In addition, AMOS also produces the 1.3 m test collimator that is used for the on-ground validation of the optical performances of the payload module under operational thermal vacuum conditions. The 1.3m collimator is designed, manufactured, assembled and tested by AMOS. It is based on a Ritchey-Chretien optical configuration, with a f/2 primary mirror and a hyperbolic secondary mirror. The mirrors are made of ZERODUR and polished by AMOS. The high performance of EUCLID PLM calls for not less demanding requirements for the test collimator, in terms of image quality, thermal stability, line of sight stability under micro-vibration, etc. Here after are presented at first the design and the strategies elaborated to cope with the stringent requirements. Then, the manufacturing and metrology of the mirrors are reported. Finally, the Assembly, Integration and Verification by test (AIV) are discussed.

Paper Details

Date Published: 12 July 2018
PDF: 15 pages
Proc. SPIE 10698, Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave, 1069835 (12 July 2018); doi: 10.1117/12.2313533
Show Author Affiliations
Olivier Pirnay, AMOS Ltd. (Belgium)
Grégory P. Lousberg, AMOS Ltd. (Belgium)
Virgile Monamy, AMOS Ltd. (Belgium)
Pierre Gloesener, AMOS Ltd. (Belgium)
Katja Rieth, AMOS Ltd. (Belgium)
Fabien Lemagne, AMOS Ltd. (Belgium)
Grégoire Réaud, AMOS Ltd. (Belgium)
Carlo Flebus, AMOS Ltd. (Belgium)

Published in SPIE Proceedings Vol. 10698:
Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave
Makenzie Lystrup; Howard A. MacEwen; Giovanni G. Fazio; Natalie Batalha; Nicholas Siegler; Edward C. Tong, Editor(s)

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