Preparing the M4 mirror

Multiple companies and teams worldwide have been involved in the production of the ELT’s M4 mirror. The German glass company SCHOTT was awarded responsibility for the casting of the mirror and heat treatment with the subsequent shaping and polishing to be completed by the French company Safran Reosc. Before being sent to the ELTs construction site in Chile the ELT mirrors are rigorously checked by the teams at ESO headquarters in Garching, Germany.



About the Image

Release date:30 September 2020, 17:21
Size:2558 x 722 px

About the Object

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