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File:ELT secondary mirror blank successfully cast.jpg

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Summary

Description
English: Opening of the ELT M2 ZERODUR® blank mould containing the still very hot ZERODUR® glass at first annealing at the SCHOTT 4-metre blank annealing facility in Mainz, Germany in May 2017. The completed mirror will be 4.2 metres in diameter and weigh 3.5 tonnes. It will be the largest secondary mirror ever employed on a telescope and also the largest convex mirror ever produced.
Date
Source https://www.eso.org/public/images/eso1715a/
Author SCHOTT/ESO

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22 May 2017

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Date/TimeThumbnailDimensionsUserComment
current03:47, 7 June 2017Thumbnail for version as of 03:47, 7 June 20175,760 × 3,840 (2.64 MB)HuntsterFull resolution.
15:48, 22 May 2017Thumbnail for version as of 15:48, 22 May 20171,280 × 853 (91 KB)JmencisomUser created page with UploadWizard
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