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Proceedings Paper • Open Access

High performance large lightweight mirrors fabrication adapted to stress-mirror polishing (SMP) technique

Paper Abstract

Earth observation space instruments require very tight optical performances in the most stringent configuration (observation in the optical wavelengths range). The optical quality of mirrors, mainly in term of both shape and roughness polishing quality, has to reach very tight specifications down to a few nanometers. In this paper, we present a new manufacturing process, based on Stress-Mirror Polishing (SMP) technique, dedicated to lightweight mirrors aspherisation. We consider specific features or constraints due to the structure of the honeycomb, while reducing footprint effects and inhomogeneous surface effects. We also identify the most efficient way to correct and/or anticipate these issues taking into account industrial constraints on real-scale mirrors. In this new process, both SMP technique and lightweight design have to be optimized.

Paper Details

Date Published: 12 July 2019
PDF: 9 pages
Proc. SPIE 11180, International Conference on Space Optics — ICSO 2018, 111806T (12 July 2019); doi: 10.1117/12.2536164
Show Author Affiliations
S. Lemared, Aix Marseille Univ., CNES, LAM, CNRS (France)
M. Ferrari, Aix Marseille Univ., CNES, LAM, CNRS (France)
T. Dufour, Thales SESO (France)
C. Du Jeu, Thales SESO (France)
E. Hugot, Aix Marseille Univ., CNES, LAM, CNRS (France)
G. R. Lemaitre, Aix Marseille Univ., CNES, LAM, CNRS (France)

Published in SPIE Proceedings Vol. 11180:
International Conference on Space Optics — ICSO 2018
Zoran Sodnik; Nikos Karafolas; Bruno Cugny, Editor(s)

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