Paper 13094-54
Paper 13094-54
ZERODUR for the ELT: mission completed
On demand | Presented live 19 June 2024 
Abstract
ZERODUR® production for the Extremely Large Telescope mirror substrates concludes in 2024. The ELT M1 substrate blank contract is by far the largest serial production ever undertaken for an astronomical telescope, as well as for SCHOTT ZERODUR® manufacturing. The production results demonstrate the maturity and reproducibility of the production process in terms of material properties and dimensional processing capabilities. The installed ZERODUR® manufacturing capacities enabled a continuous ELT M1 blank production on high quality level in parallel to an extraordinary increase in ZERODUR® demand of the IC Lithography equipment industry. This paper reflects the SCHOTT contribution to the ELT. It reviews the excellent data on the coefficient of thermal expansion and the dimensional characteristics achieved for the complete set of 949 M1 segment blanks, vastly better than specified.
Presenter
Thomas Werner
SCHOTT AG (Germany)
Head of the ELT Project at SCHOTT
managing the ZERODUR substrate manufacturing for the ESO ELT M1, M2, M3 and M4 blanks.
Process development engineer and processing expert on ZERODUR CNC machining.
Long experinence and heritage in manufacturing of ZERODUR components for astronomical telescope projects.
Part of the project team for the ESO VLT 8 m size ZERODUR blank production.