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Proceedings Paper

E-ELT optomechanics: overview
Author(s): M. Cayrel
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Paper Abstract

The E-ELT is a project led by the European Southern Observatory (ESO) for a 40-m class optical, near- and midinfrared, ground-based telescope. When it will enter into operation, the E-ELT will be the largest and most powerful optical telescope ever built. It will not only offer unrivalled light collecting power, but also exceedingly sharp images, thanks to its ability to compensate for the adverse effect of atmospheric turbulence on image sharpness. The basic optical solution for the EELT is a folded three-mirror anastigmat, using a 39-m segmented primary mirror (M1), a 4-m convex secondary mirror (M2), and a 4-m concave tertiary mirror (M3), all active. Folding is provided by two additional flat mirrors sending the beams to either Nasmyth foci along the elevation axis of the telescope. The folding arrangement (flat M4 and M5 mirrors) is conceived to provide conveniently located flat surfaces for an adaptive shell (M4) and field stabilization (M5). That paper provides an overview of the specifications, design, and expected performance of the E-ELT optical systems.

Paper Details

Date Published: 17 September 2012
PDF: 18 pages
Proc. SPIE 8444, Ground-based and Airborne Telescopes IV, 84441X (17 September 2012); doi: 10.1117/12.925175
Show Author Affiliations
M. Cayrel, European Southern Observatory (Germany)

Published in SPIE Proceedings Vol. 8444:
Ground-based and Airborne Telescopes IV
Larry M. Stepp; Roberto Gilmozzi; Helen J. Hall, Editor(s)

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