The ELT M2 mirror in metrology

At 4.25 metres across, the Extremely Large Telescope’s (ELT's) secondary mirror, M2, will be the largest optical secondary mirror ever used on a telescope. Here, the Safran Reosc team in France is measuring the accuracy of the M2’s surface; it needs to be accurate to a few nanometres, about 20 000 times thinner than a human hair.

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Safran

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Identification:img-7432
Type:Photographique
Date de publication:27 novembre 2023 14:20
Taille:4032 x 3024 px

À propos de l'objet

Nom:Extremely Large Telescope
Type:Unspecified : Technology : Observatory : Telescope
Catégorie:ELT

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