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Proceedings Paper

Assembly, integration, and test of the layer-oriented wavefront sensor for MAD
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Paper Abstract

MAD5 is a Multi-Conjugate Adaptive Optics (MCAO) system conceived to demonstrate the feasibility of MCAO on the sky. The wave front sensor part is divided in two channels: a Shack-Hartmann sensor and a Layer Oriented sensor. We will describe the construction of the latter one. Assembly, integration and test of the instrument are the first steps for ESO acceptance, before integrating the Layer Oriented sensor with the other components of MAD. We will show qualitative and quantitative results of optical and mechanical tests: in particular we will describe the alignment of the references selection unit, constituted by sixteen motorized linear positioners and eight star enlargers, of the beam compressor and of the two re-imaging objectives, each one conjugated to a different altitude. Being the pyramid the core of this kind of wave front sensor, we will focus our attention on its construction difficulties and we will discuss all the optical tests made to choose the best ones to be installed on the wave front sensor. Finally we will present the sensor performance showing the first open loop results.

Paper Details

Date Published: 25 October 2004
PDF: 9 pages
Proc. SPIE 5490, Advancements in Adaptive Optics, (25 October 2004); doi: 10.1117/12.551567
Show Author Affiliations
Matteo Lombini, INAF, Osservatorio Astrofisico di Arcetri (Italy)
INAF, Osservatorio Astrofisico di Bologna (Italy)
Roberto Ragazzoni, INAF, Osservatorio Astrofisico di Arcetri (Italy)
Max-Plank-Institut fur Astronomie (Germany)
Carmelo Arcidiacono, Univ. degli Studi di Firenze (Italy)
Andrea Baruffolo, INAF, Osservatorio Astronomico di Padova (Italy)
Raffaella Bisson, Nidek Technologies Srl (Italy)
Angela Brindisi, INAF, Osservatorio Astrofisico di Arcetri (Italy)
Julien Coyne, Univ. de Strasbourg (France)
Emiliano Diolaiti, INAF, Osservatorio Astrofisico di Arcetri (Italy)
INAF, Osservatorio Astronomico di Bologna (Italy)
Jacopo Farinato, INAF, Osservatorio Astrofisico di Arcetri (Italy)
Brice Le Roux, INAF, Osservatorio Astrofisico di Arcetri (Italy)
Gianluca Lombardi, INAF, Osservatorio Astrofisico di Arcetri (Italy)
Enrico Marchetti, European Southern Observatory (Germany)
Gianluigi Meneghini, Nidek Technologies Srl (Italy)
Elise Vernet-Viard, INAF, Osservatorio Astrofisico di Arcetri (Italy)
Marco Xompero, INAF, Osservatorio Astrofisico di Arcetri (Italy)


Published in SPIE Proceedings Vol. 5490:
Advancements in Adaptive Optics
Domenico Bonaccini Calia; Brent L. Ellerbroek; Roberto Ragazzoni, Editor(s)

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