{"id":39026,"date":"2020-09-04T15:00:25","date_gmt":"2020-09-04T13:00:25","guid":{"rendered":"https:\/\/www.expo21xx.com\/news\/?p=39026"},"modified":"2021-03-16T23:03:59","modified_gmt":"2021-03-16T22:03:59","slug":"symetrie-hexapods-testing-931-segments-primary-mirror-eso-elt","status":"publish","type":"post","link":"https:\/\/www.expo21xx.com\/news\/symetrie-hexapods-testing-931-segments-primary-mirror-eso-elt\/","title":{"rendered":"Four Symetrie hexapods are testing the 931 segments of the primary mirror of ESO ELT!"},"content":{"rendered":"\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"700\" height=\"525\" src=\"https:\/\/www.expo21xx.com\/news\/wp-content\/uploads\/SYMETRIE-ZONDA-Hexapod-FM2A-700x525.jpg\" alt=\"\" class=\"wp-image-39027\" srcset=\"https:\/\/www.expo21xx.com\/news\/wp-content\/uploads\/SYMETRIE-ZONDA-Hexapod-FM2A-700x525.jpg 700w, https:\/\/www.expo21xx.com\/news\/wp-content\/uploads\/SYMETRIE-ZONDA-Hexapod-FM2A-139x104.jpg 139w, https:\/\/www.expo21xx.com\/news\/wp-content\/uploads\/SYMETRIE-ZONDA-Hexapod-FM2A-350x263.jpg 350w, https:\/\/www.expo21xx.com\/news\/wp-content\/uploads\/SYMETRIE-ZONDA-Hexapod-FM2A-768x576.jpg 768w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><figcaption>Photo by Symetrie<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Operated\nby ESO, the European Southern Observatory, the Extremely Large Telescope (ELT)\nwill be the most powerful giant telescope in the world, with an M1 primary\nmirror of 39 meters in diameter. It will be 4 to 5 times larger than current\nequipment and collect 15 times more light.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">ESO\nentrusted Safran Reosc with the polishing and testing of the 931 segments, each\nabout 1.40 m width: 798 segments forming the M1 mirror and 133 spare segments.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The\ngeneral concept of this project is to realize a modular telescope, which allows\nmanufacturing parts in large quantities and considerably reduced costs.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">To meet this industrial challenge, Safran Reosc has created a production\nplant in Poitiers, in which four Symetrie hexapods are installed: a hexapod is\nused to characterize the blanks of the segments, a hexapod positions the\nsegments, a hexapod sets the reference and another hexapod aligns the deflection\nmirror at the top of the several meters tower.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The main characteristics of these hexapods are their very good\nresolution of 0.1 \u00b5rad and their excellent stability of 0.1 \u00b5rad over 1 hour,\nwhich required the creation of specific measuring tools.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Two of these hexapods incorporate a 360 \u00b0 turntable integrated in the mobile\nplatform of the hexapod, while having a load capacity of 2 tons.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">According to Laurent-Daniel Haret, ELT-M1 Safran Reosc metrology project\nmanager, \u201cwe now have a set of machines on site that will allow us to position\nour optical parts with remarkable precision and stability. &#8220;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Built in Chile at an altitude of 3,046 m, the ELT will allow significant progress in astronomy (stellar archeology, discovery and characterization of exoplanets, etc.). Its &#8220;first light&#8221; is scheduled for 2024<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For more information, please visit: <a rel=\"noreferrer noopener\" label=\" (opens in a new tab)\" href=\"https:\/\/symetrie.fr\/\" target=\"_blank\">https:\/\/symetrie.fr\/<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Operated by ESO, the European Southern Observatory, the Extremely Large Telescope (ELT) will be the most powerful giant telescope in the world, with an M1 primary mirror of 39 meters in diameter. [&hellip;]<\/p>\n","protected":false},"author":12,"featured_media":39029,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[8,1288,446,1287,79],"class_list":["post-39026","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-automation-robotics","tag-automation","tag-elt","tag-factory-automation","tag-hexapod","tag-industrial-automation"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Four Symetrie hexapods are testing the 931 segments of the primary mirror of ESO ELT! - EXPO21XX.com NEWS<\/title>\n<meta name=\"description\" content=\"Symetrie was chosen by Safran Reosc to supply the positioners used to test the segments of the ELT primary mirror. 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