ELT secondary mirror during transport to annealing facility

The ELT secondary mirror blank, cast out of ZERODUR®, arrives at the SCHOTT 4-metre blank annealing facility in Mainz, Germany in May 2017. Here, it will go through a slow cool-down, machining and heat treatment sequence over the next year. It will then be ready to be ground to precisely the right shape and polished.

Credit:

SCHOTT/ESO

About the Image

Id:eso1715f
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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