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Proceedings Paper • Open Access

Design, manufacturing and testing of a four-mirror telescope with a wide field of view
Author(s): P. Gloesener; F. Wolfs; F. Lemagne; M. Cola; C. Flebus; G. Blanchard; V. Kirschner

Paper Abstract

Regarding Earth observation missions, it has become unnecessary to point out the importance of making available wide field of view optical instruments for the purpose of spectral imaging.

Taking advantage of the pushbroom instrument concept with its linear field across the on-ground track, it is in particular relevant to consider front-end optical configurations that involve an all-reflective system presenting inherent and dedicated advantages such as achromaticity, unobscuration and compactness, while ensuring the required image quality over the whole field.

The attractiveness of the concept must be balanced with respect to the state-of-the-art mirror manufacturing technologies as the need for fast, broadband and wide field systems increases the constraints put on the feasibility of each individual component.

As part of an ESTEC contract, AMOS designed, manufactured and tested a breadboard of a four-mirror wide field telescope for typical Earth observation superspectral missions.

The initial purpose of the development was to assess the feasibility of a telecentric spaceborne three-mirror system covering an unobscured rectangular field of view of 26 degrees across track (ACT) by 6 degrees along track (ALT) with a f-number of 3.5 and a focal length of 500 mm and presenting an overall image quality better than 100 nm RMS wavefront error within the whole field.

Paper Details

Date Published: 20 November 2017
PDF: 7 pages
Proc. SPIE 10565, International Conference on Space Optics — ICSO 2010, 105650C (20 November 2017); doi: 10.1117/12.2309113
Show Author Affiliations
P. Gloesener, AMOS Ltd. (Belgium)
F. Wolfs, AMOS Ltd. (Belgium)
F. Lemagne, AMOS Ltd. (Belgium)
M. Cola, AMOS Ltd. (Belgium)
C. Flebus, AMOS Ltd. (Belgium)
G. Blanchard, AMOS Ltd. (Belgium)
V. Kirschner, ESTEC (Netherlands)

Published in SPIE Proceedings Vol. 10565:
International Conference on Space Optics — ICSO 2010
Errico Armandillo; Bruno Cugny; Nikos Karafolas, Editor(s)

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