ELT optomechanics: construction status

Marc Cayrel; Philippe Dierickx; Andreas Förster; Frédéric Derie; Liselotte Jochum; Lorenzo Pettazzi; Christian Lucuix; Christoph Haupt; Michael Müller; Elise Vernet; Jean-François Pirard

doi:10.1117/12.2312665

6 July 2018 ELT optomechanics: construction status

Marc Cayrel, Philippe Dierickx, Andreas Förster, Frédéric Derie, Liselotte Jochum, Lorenzo Pettazzi, Christian Lucuix, Christoph Haupt, Michael Müller, Elise Vernet, Jean-François Pirard

Author Affiliations +

Proceedings Volume 10700, Ground-based and Airborne Telescopes VII; 1070018 (2018) https://doi.org/10.1117/12.2312665
Event: SPIE Astronomical Telescopes + Instrumentation, 2018, Austin, Texas, United States

Abstract

The ELT is a project led by the European Southern Observatory (ESO) for a 40-m class optical, near- and mid-infrared, ground-based telescope. When it will enter into operation, the ESO 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 ESO ELT 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). This paper provides an update of the specifications, design, and manufacturing of the ESO ELT optical systems

Conference Presentation

Citation Download Citation

Marc Cayrel, Philippe Dierickx, Andreas Förster, Frédéric Derie, Liselotte Jochum, Lorenzo Pettazzi, Christian Lucuix, Christoph Haupt, Michael Müller, Elise Vernet, and Jean-François Pirard "ELT optomechanics: construction status", Proc. SPIE 10700, Ground-based and Airborne Telescopes VII, 1070018 (6 July 2018); https://doi.org/10.1117/12.2312665

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available