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Proceedings Paper

New modelling of freeform surfaces for optical design of astronomical instruments
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Paper Abstract

Freeform optics offer additional degrees of freedom that can lead to a simplification of instrument optical designs with compact solutions. In this context, we propose a new mathematical description of freeform surfaces. This new mathematical formalism, based on the "eigen-modes" of Bernstein polynomials was developed for off-axis highly aspherical surfaces modelling. It allows to take into account different kinds of deformations of the optical surface with local influence capabilities. We present the mathematical formalism developed and then we focus on the optical analysis of an innovative instrument design. The advantages provided by this new modelling are examined.

Paper Details

Date Published: 13 September 2012
PDF: 10 pages
Proc. SPIE 8450, Modern Technologies in Space- and Ground-based Telescopes and Instrumentation II, 845053 (13 September 2012); doi: 10.1117/12.925299
Show Author Affiliations
S. Pascal, Lab. d'Astrophysique de Marseille, CNRS, Aix-Marseille Univ. (France)
M. Gray, Lab. d'Astrophysique de Marseille, CNRS, Aix-Marseille Univ. (France)
S. Vives, Lab. d'Astrophysique de Marseille, CNRS, Aix-Marseille Univ. (France)
D. Le Mignant, Lab. d'Astrophysique de Marseille, CNRS, Aix-Marseille Univ. (France)
M. Ferrari, Lab. d'Astrophysique de Marseille, CNRS, Aix-Marseille Univ. (France)
J.-G. Cuby, Lab. d'Astrophysique de Marseille, CNRS, Aix-Marseille Univ. (France)
K. Dohlen, Lab. d'Astrophysique de Marseille, CNRS, Aix-Marseille Univ. (France)


Published in SPIE Proceedings Vol. 8450:
Modern Technologies in Space- and Ground-based Telescopes and Instrumentation II
Ramón Navarro; Colin R. Cunningham; Eric Prieto, Editor(s)

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