Active Phasing Experiment: preliminary results and prospects
| Autor: | Rainer Wilhelm, Sergio Chueca, R. Mazzoleni, Isabelle Surdej, Christophe Dupuy, Pinna E., R. Brast, Bruno Luong, Lothar Noethe, N. Yaitskova, Christoph Frank, Frédéric Gonté, P. Duhoux, C. Araujo, R. Bourtembourg, Frederic Derie, Robert Karban, Arthur Vigan |
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| Přispěvatelé: | European Southern Observatory (ESO), FOGALE Nanotech, Fogale nanotech, INAF - Osservatorio Astrofisico di Arcetri (OAA), Istituto Nazionale di Astrofisica (INAF), Instituto de Astrofisica de Canarias (IAC), Laboratoire d'Astrophysique de Marseille (LAM), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2008 |
| Předmět: |
Wavefront
Physics Test bench Segmented mirror media_common.quotation_subject Active optics 01 natural sciences law.invention 010309 optics Primary mirror Telescope law Sky Control system 0103 physical sciences [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] 010303 astronomy & astrophysics media_common Remote sensing |
| Zdroj: | SPIE Astronomical Telescopes + Instrumentation SPIE Astronomical Telescopes + Instrumentation, Jul 2008, Marseille, France. pp.70120Z, ⟨10.1117/12.790342⟩ |
| Popis: | International audience; The purpose of the Active Phasing Experiment, designed under the lead of ESO, is to study new phasing technologies and to validate wavefront control concepts for Extremely Large Telescopes. The Active Phasing Experiment is currently tested in the laboratory at the ESO headquarters and will be tested on sky at a Nasmyth focus of a VLT unit telescope at the end of 2008. The test bench contains four different phasing sensors which are tested in parallel to compare them under the same conditions. They have been developed by Istituto Nazionale di Astrofisica in Florenze, Instituto Astrofisica Canarias in Tenerife, Laboratoire d'Astrophysique de Marseille and ESO. It includes also an Active Segmented Mirror which simulates the segmentation of a primary mirror. A non-contact optical metrology has been developed by Fogale Nanotech to control it. The VLT focus and the VLT atmospheric conditions are simulated in the laboratory with a turbulence generator producing a seeing between 0.45 and 0.85 arcsec. Once installed on a VLT unit telescope, the control system of the Active Phasing Experiment will be able to control the phasing of the ASM, but also the guiding and the active optics of the VLT. This proceeding gives a brief summary of the opto-mechanical aspects of the Active Phasing experiment, describes its control system and gives an analysis of the preliminary results obtained in the laboratory. |
| Databáze: | OpenAIRE |
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