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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



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ID: 559487.0, MPI für Astronomie / Publikationen_mpia
Extreme Adaptive Optics in the mid-IR: The METIS AO system
Authors:Stuik, R.; Jolissaint, L.; Kendrew, S.; Hippler, S.; Brandl, B.; Venema, L.
Language:English
Publisher:EDP Sciences
Date of Publication (YYYY-MM-DD):2010
Title of Proceedings:Adaptative Optics for Extremely Large Telescopes,
Start Page:id.02006 online
Name of Conference/Meeting:1st AO4ELT conference - Adaptative Optics for Extremely Large Telescopes,
Review Status:not specified
Audience:Experts Only
Abstract / Description:Adaptive Optics at mid-IR wavelengths has long been seen as either not necessary or easy. The impact of atmospheric turbulence on the performance of 8-10 meter class telescopes in the mid-IR is relatively small compared to other performance issues like sky background and telescope emission. Using a relatively low order AO system, Strehl Ratios of larger than 95% have been reported on 6-8 meter class telescopes. Going to 30-42 meter class telescopes changes this picture dramatically. High Strehl Ratios require what is currently considered a high-order AO system. Furthermore, even with a moderate AO system, first order simulations show that the performance of such a system drops significantly when not taking into account refractivity effects and atmospheric composition variations. Reaching Strehl Ratios of over 90% at L, M and N band will require special considerations and will impact the system design and control scheme of AO systems for mid-IR on ELTs. In this paper we present an overview of the effects that impact the performance of an AO system at mid-IR wavelengths on an ELT and simulations on the performance and we will present a first order system concept of such an AO system for METIS, the mid-IR instrument for the E-ELT.
Comment of the Author/Creator:Date: 2010, n/a 1, 2010
External Publication Status:published
Document Type:Conference-Paper
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:URL:http://adsabs.harvard.edu/abs/2010aoel.confE2006S [ID No:1]
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