ESO's first 18 ELT mirror blanks arrive in France for finishing . 06?Aug?2019 Blanks produced by Schott will be polished by Safran-Reosc, cut into hexagons then final-polished by ion beam figuring. The first shipment of ELT primary mirror blanks arrives at Safran Reosc. The first set of 18 blanks for the primary mirror of European Southern Observatory’s Extremely Large Telescope have arrived at Safran Reosc in Poitiers, France. The contracts for casting the blan...