File:Blank Canvas the ELT’s M2 Mirror Blank.tif

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English: This image shows the massive 3-ton blank for the ELT’s secondary mirror. This technological blank has been successfully machined from a slab of the low-expansion ceramic material ZERODURⓇ into its near-final form by the German company SCHOTT. M2 will be the largest ever secondary mirror employed on a telescope, as well as the largest convex mirror ever produced. Fabricating this highly convex, aspherical mirror is a considerable challenge — and the result will be a truly remarkable example of pioneering optical engineering. The secondary mirror and its support system — weighing 12 tonnes — will hang upside-down high above the 39-metre primary mirror.
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Source https://www.eso.org/public/images/ann19003a/
Author SCHOTT

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current10:15, 16 January 2019Thumbnail for version as of 10:15, 16 January 20192,362 × 1,772 (5.83 MB)Jmencisom (talk | contribs)User created page with UploadWizard

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