Space Active Optics: toward optimized correcting mirrors for future large spaceborne observatories

Marie Laslandes; Emmanuel Hugot; Marc Ferrari; Gérard Lemaitre; Arnaud Liotard

doi:10.1117/12.896505

21 September 2011 Space Active Optics: toward optimized correcting mirrors for future large spaceborne observatories

Marie Laslandes, Emmanuel Hugot, Marc Ferrari, Gérard Lemaitre, Arnaud Liotard

Proceedings Volume 8167, Optical Design and Engineering IV; 816713 (2011) https://doi.org/10.1117/12.896505
Event: SPIE Optical Systems Design, 2011, Marseille, France

Abstract

Wave-front correction in optical instruments is often needed, either to compensate Optical Path Differences, off-axis aberrations or mirrors deformations. Active optics techniques are developed to allow efficient corrections with deformable mirrors. In this paper, we will present the conception of particular deformation systems which could be used in space telescopes and instruments in order to improve their performances while allowing relaxing specifications on the global system stability. A first section will be dedicated to the design and performance analysis of an active mirror specifically designed to compensate for aberrations that might appear in future 3m-class space telescopes, due to lightweight primary mirrors, thermal variations or weightless conditions. A second section will be dedicated to a brand new design of active mirror, able to compensate for given combinations of aberrations with a single actuator. If the aberrations to be corrected in an instrument and their evolutions are known in advance, an optimal system geometry can be determined thanks to the elasticity theory and Finite Element Analysis.

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Marie Laslandes, Emmanuel Hugot, Marc Ferrari, Gérard Lemaitre, and Arnaud Liotard "Space Active Optics: toward optimized correcting mirrors for future large spaceborne observatories", Proc. SPIE 8167, Optical Design and Engineering IV, 816713 (21 September 2011); https://doi.org/10.1117/12.896505

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KEYWORDS

Actuators

Mirrors

Space telescopes

Deformable mirrors

Active optics

Finite element methods

Optical aberrations

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