SCHOTT is part of the new mega project of the European Southern Observatory (ESO): the European Extremely Large Telescope, E-ELT for short, that will have a main mirror 39 meters in diameter and is currently being built in Chile. These dimensions will make it the largest ground-based optical telescope in the world for visible and near-infrared light ... We are “extremely” happy to be part of it!

On this platform, you will find news, stay informed about important milestones of the project and get exciting and exclusive insights into our contribution to the new mega telescope. Follow us on social media too!

Capacity expansion in record time


Interview about the challenges of constructing the second ZERODUR® glass-ceramic melting tank and perfect teamwork.
SCHOTT Infographics E-ELT optical system

The optical system of the E-ELT and the role of ZERODUR®


This infographics shows the novel 5-mirror optical system of ESO's Extremely Large Telescope (ELT) and the position of the ZERODUR® mirror substrates.
SCHOTT contract M2 & M3 mirror

The world’s largest telescope is made possible by this glass-ceramic from SCHOTT


SCHOTT has been awarded a contract for the production of mirror substrates for the secondary (M2) and tertiary mirrors (M3) of the European Extremely Large Telescope. M2 will be the largest convex mirror ever produced. A second melting tank will soon go into operation to meet the sustained high demand for ZERODUR® glass-ceramic.