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Proceedings Paper

First steps in the development of a piston sensor for large aperture space telescopes
Author(s): Géraldine Guerri; Stéphane Roose; Yvan Stockman; Alexandra Mazzoli; Jean Surdej; Jean-Marc Defise
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Paper Abstract

Nowadays spaceborne missions for astronomy or Earth imaging need high resolution observation which implies the development of large aperture telescopes. This can be achieved by multi-aperture telescopes or large segmented telescopes. One of the major issues is the phasing of the sub-apertures or the segments of such telescopes. A cophasing sensor is therefore mandatory to achieve the ultimate resolution of these telescopes. In this framework, Liège Space Center (CSL) concern is the development of a compact cophasing sensor to phase new large lightweight segmented mirrors for future space telescopes. The sensor concept has its origins in new phase retrieval algorithms which have been recently developed. In this paper, we outline the concept and the experimental validation results of our piston sensor breadboard which is currently under development in our laboratory. Finally, future prospects and further developments of our experiment are presented.

Paper Details

Date Published: 11 August 2010
PDF: 8 pages
Proc. SPIE 7731, Space Telescopes and Instrumentation 2010: Optical, Infrared, and Millimeter Wave, 773154 (11 August 2010); doi: 10.1117/12.857247
Show Author Affiliations
Géraldine Guerri, Ctr. Spatial de Liège (Belgium)
Institut d'Astrophysique et de Géophysique, Univ. de Liège (Belgium)
Stéphane Roose, Ctr. Spatial de Liège (Belgium)
Yvan Stockman, Ctr. Spatial de Liège (Belgium)
Alexandra Mazzoli, Ctr. Spatial de Liège (Belgium)
Jean Surdej, Institut d'Astrophysique et de Géophysique, Univ. de Liège (Belgium)
Jean-Marc Defise, Ctr. Spatial de Liège (Belgium)


Published in SPIE Proceedings Vol. 7731:
Space Telescopes and Instrumentation 2010: Optical, Infrared, and Millimeter Wave
Jacobus M. Oschmann; Mark C. Clampin; Howard A. MacEwen, Editor(s)

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