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Proceedings Paper • Open Access

Development of a three-mirror anastigmat telescope for the GERB experiment
Author(s): Pierre Gloesener; Eric Quertemont; Carlo Flebus

Paper Abstract

The GERB experiment, on-board Meteosat Second Generation, aims at monitoring the Earth radiation budget within a broad spectral range (0.32 –30 ‡m). This paper outlines the development of the GERB imaging subsystem, a f/2 three-mirror anastigmat telescope with a 18° x 0,28° rectangular field-of-view. The telescope is an all-aluminium design, comprising a primary off-axis elliptical mirror and two spherical ones, with a largest size of 100 mm. After integration and environmental testing, its global on-axis imaging performance reached 0,45 ‡ rms at 633 nm for an optical design value of 0,27 ‡ rms. The global opto-mechanical tolerance analysis of the design phase defined an integration sequence able to keep the individual alignment of each mirror within the accuracy needed to ascertain the whole telescope quality.

Paper Details

Date Published: 21 November 2017
PDF: 11 pages
Proc. SPIE 10569, International Conference on Space Optics — ICSO 2000, 105691W (21 November 2017); doi: 10.1117/12.2307913
Show Author Affiliations
Pierre Gloesener, AMOS Ltd. (Belgium)
Eric Quertemont, AMOS Ltd. (Belgium)
Carlo Flebus, AMOS Ltd. (Belgium)

Published in SPIE Proceedings Vol. 10569:
International Conference on Space Optics — ICSO 2000
Georges Otrio, Editor(s)

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