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Extracting the scalloping error from closed loop AO data
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Paper Abstract

In this paper, we present an algorithm and supporting simulations results showing how a single conjugated AO system can be used to detect a scalloping error occurring in the telescope. We show that when the scalloping error modes are entered in the reconstruction modal basis, the Deformable Mirror shape can be used to estimate the scalloping error through a simple matrix vector multiply. Temporal averaging allows to get rid of the atmospheric noise on the scalloping measurement assuming a perfect “scalloping actuator” and to get a measurement accuracy of about 20nm rms.

Paper Details

Date Published: 5 July 2016
PDF: 8 pages
Proc. SPIE 10012, Integrated Modeling of Complex Optomechanical Systems II, 100120A (5 July 2016); doi: 10.1117/12.2202718
Show Author Affiliations
Miska Le Louarn, European Southern Observatory (Germany)
Henri Bonnet, European Southern Observatory (Germany)
Michael Esselborn, European Southern Observatory (Germany)
Pierre-Yves Madec, European Southern Observatory (Germany)
Enrico Marchetti, European Southern Observatory (Germany)

Published in SPIE Proceedings Vol. 10012:
Integrated Modeling of Complex Optomechanical Systems II
Marco Riva, Editor(s)

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