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Proceedings Paper

Design and performances of the Shack-Hartmann sensor within the Active Phasing Experiment
Author(s): R. Mazzoleni; F. Gonté; I. Surdej; C. Araujo; R. Brast; F. Derie; P. Duhoux; C. Dupuy; C. Frank; R. Karban; L. Noethe; N. Yaitskova
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Paper Abstract

The Shack-Hartmann Phasing Sensor (SHAPS) has been integrated in the Active Phasing Experiment (APE) at ESO. It is currently under test in the laboratory. The tests on sky are foreseen for the end of 2008, when APE will be mounted at the Nasmyth focus of one of the VLT unit telescopes. SHAPS is based on the Shack-Hartmann principle: the lenslet array is located in a plane which is optically conjugated to the Active Segmented Mirror (ASM) of APE and is composed of two types of microlenses, circular and cylindrical, which give information about the wavefront slope and the piston steps, respectively. This proceeding contains a description of SHAPS and of the algorithms implemented for the wavefront reconstruction and for the phasing. The preliminary results obtained during the laboratory tests are discussed and compared with the theoretical predictions. The performances of SHAPS at the VLT and at the European Extremely Large Telescope (E-ELT) are estimated.

Paper Details

Date Published: 17 July 2008
PDF: 12 pages
Proc. SPIE 7012, Ground-based and Airborne Telescopes II, 70123A (17 July 2008); doi: 10.1117/12.789375
Show Author Affiliations
R. Mazzoleni, European Organisation for Astronomical Research in the Southern Hemisphere (Germany)
F. Gonté, European Organisation for Astronomical Research in the Southern Hemisphere (Germany)
I. Surdej, European Organisation for Astronomical Research in the Southern Hemisphere (Germany)
C. Araujo, European Organisation for Astronomical Research in the Southern Hemisphere (Germany)
R. Brast, European Organisation for Astronomical Research in the Southern Hemisphere (Germany)
F. Derie, European Organisation for Astronomical Research in the Southern Hemisphere (Germany)
P. Duhoux, European Organisation for Astronomical Research in the Southern Hemisphere (Germany)
C. Dupuy, European Organisation for Astronomical Research in the Southern Hemisphere (Germany)
C. Frank, European Organisation for Astronomical Research in the Southern Hemisphere (Germany)
R. Karban, European Organisation for Astronomical Research in the Southern Hemisphere (Germany)
L. Noethe, European Organisation for Astronomical Research in the Southern Hemisphere (Germany)
N. Yaitskova, European Organisation for Astronomical Research in the Southern Hemisphere (Germany)


Published in SPIE Proceedings Vol. 7012:
Ground-based and Airborne Telescopes II
Larry M. Stepp; Roberto Gilmozzi, Editor(s)

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