Opening of the ELT secondary blank mould

Opening of the ELT secondary mirror blank mould, containing the still very hot ZERODUR® glass at first annealing. The blank was transferred from the SCHOTT melting facility to the SCHOTT 4-metre blank annealing facility in Mainz, Germany in May 2017. The casting of this mirror is a major step towards building the world’s biggest eye on the sky, one of ESO’s greatest feats.

Credit:

SCHOTT/ESO

About the Image

Id:eso1715k
Type:Photographic
Release date:22 May 2017, 12:00
Related releases:eso1715
Size:5760 x 3840 px

About the Object

Type:Unspecified : Technology
Category:ELT

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