{"id":88120,"date":"2015-06-26T06:23:04","date_gmt":"2015-06-26T04:23:04","guid":{"rendered":"http:\/\/batijournal.com\/?p=88120"},"modified":"2019-07-15T11:21:51","modified_gmt":"2019-07-15T09:21:51","slug":"des-plaques-daluminium-creent-des-projections-qui-saniment-avec-le-ciel","status":"publish","type":"post","link":"https:\/\/batijournal.com\/index.php\/des-plaques-daluminium-creent-des-projections-qui-saniment-avec-le-ciel\/88120\/","title":{"rendered":"Des plaques d&rsquo;aluminium cr\u00e9ent des projections qui s&rsquo;animent avec le ciel"},"content":{"rendered":"<p><strong>Sur le campus de l&rsquo;EPFL (Ecole Polytechnique F\u00e9d\u00e9rale de Lausanne), quatre plaques d\u2019aluminium, inclin\u00e9es vers le ciel, transforment la voute du Rolex Learning Center en \u00e9cran g\u00e9ant. Les chercheurs de l\u2019EPFL ont utilis\u00e9 l\u2019effet dit \u00abcaustique\u00bb en r\u00e9flexion, composant ainsi des projections lumineuses qui se m\u00e9tamorphosent et se d\u00e9placent en fonction du temps et des saisons.<\/strong><\/p>\n<div id=\"attachment_88121\" style=\"width: 610px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-88121\" class=\"size-full wp-image-88121\" src=\"https:\/\/batijournal.com\/wp-content\/uploads\/2015\/06\/18c607f4.jpg\" alt=\"Photo : EPFL Alain Herzog\" width=\"600\" height=\"342\" srcset=\"https:\/\/batijournal.com\/wp-content\/uploads\/2015\/06\/18c607f4.jpg 600w, https:\/\/batijournal.com\/wp-content\/uploads\/2015\/06\/18c607f4-150x86.jpg 150w, https:\/\/batijournal.com\/wp-content\/uploads\/2015\/06\/18c607f4-300x171.jpg 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><p id=\"caption-attachment-88121\" class=\"wp-caption-text\">Photo : EPFL Alain Herzog<\/p><\/div>\n<p>Marie Curie, Alan Turing, Eileen Gray et Rachel Carson apparaissent sous la voute d\u00e8s que la lumi\u00e8re frappe les plaques de m\u00e9tal gr\u00e2ce \u00e0 l\u2019effet \u00abcaustique\u00bb. Il peut \u00eatre observ\u00e9 un peu partout autour de nous. Les vitres, la surface de l\u2019eau, des objets m\u00e9talliques brillants cr\u00e9ent souvent par r\u00e9flexion ou r\u00e9fraction des motifs apparemment al\u00e9atoires sur des surfaces proches. En infographie, ces mod\u00e8les sont appel\u00e9s des caustiques. Gr\u00e2ce \u00e0 des algorithmes d\u00e9velopp\u00e9s par le Laboratoire d\u2019informatique graphique et g\u00e9om\u00e9trique (LGG), les chercheurs ont \u00e9t\u00e9 capables de ma\u00eetriser et d\u2019organiser en images coh\u00e9rentes cet effet. Apr\u00e8s une premi\u00e8re r\u00e9alisation sur des plaques d\u2019acrylique transparent \u2013 la lumi\u00e8re passait \u00e0 travers le mat\u00e9riau &#8211; qui a permis de faire d\u00e9couvrir cette nouvelle technologie, il a fallu \u00e0 l\u2019\u00e9quipe de Mark Pauly plus d\u2019un an et demi de travail pour r\u00e9aliser cette installation \u00e9tonnante sur des plaques d\u2019aluminium \u2013 cette fois, la lumi\u00e8re est r\u00e9fl\u00e9chie par le mat\u00e9riau. \u00abC\u2019est une op\u00e9ration d\u2019une tr\u00e8s grande minutie, nous avons d\u00fb d\u00e9velopper un processus de fabrication qui garantisse que la surface 3D calcul\u00e9e par notre algorithme puisse \u00eatre r\u00e9alis\u00e9e avec toute la pr\u00e9cision n\u00e9cessaire\u00bb, pr\u00e9cise Romain Testuz, sp\u00e9cialis\u00e9 dans la fabrication num\u00e9rique. En effet, ce nouvel algorithme informatique calcule les infimes courbures de la surface pour produire l&rsquo;image en fonction de diff\u00e9rents param\u00e8tres tels que la direction de la lumi\u00e8re, les propri\u00e9t\u00e9s des mat\u00e9riaux, et la distance focale. Il s\u2019agit de concentrer la lumi\u00e8re sur les r\u00e9gions \u00e9clair\u00e9es de l\u2019image et de la d\u00e9tourner des r\u00e9gions sombres. Gr\u00e2ce \u00e0 cette installation, les chercheurs ont pu montrer que les algorithmes peuvent \u00eatre utilis\u00e9s dans diff\u00e9rents domaines comme l\u2019architecture, le design ou la technologie.<\/p>\n<p><a href=\"http:\/\/solid.rayform.ch\" target=\"_blank\" rel=\"noopener noreferrer\">solid.rayform.ch<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Sur le campus de l&rsquo;EPFL (Ecole Polytechnique F\u00e9d\u00e9rale de Lausanne), quatre plaques d\u2019aluminium, inclin\u00e9es vers le ciel, transforment la voute du Rolex Learning Center en \u00e9cran g\u00e9ant. Les chercheurs de l\u2019EPFL ont utilis\u00e9 l\u2019effet dit \u00abcaustique\u00bb en r\u00e9flexion, composant ainsi des projections lumineuses qui se m\u00e9tamorphosent et se d\u00e9placent en fonction du temps et des [&hellip;]<\/p>\n","protected":false},"author":17,"featured_media":88122,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[6340],"tags":[11047,1462],"class_list":["post-88120","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-architecture-conception","tag-innovation","tag-recherche"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Des plaques d&#039;aluminium cr\u00e9ent des projections qui s&#039;animent avec le ciel<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/batijournal.com\/index.php\/des-plaques-daluminium-creent-des-projections-qui-saniment-avec-le-ciel\/88120\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Des plaques d&#039;aluminium cr\u00e9ent des projections qui s&#039;animent avec le ciel\" \/>\n<meta property=\"og:description\" content=\"Sur le campus de l&rsquo;EPFL (Ecole Polytechnique F\u00e9d\u00e9rale de Lausanne), quatre plaques d\u2019aluminium, inclin\u00e9es vers le ciel, transforment la voute du Rolex Learning Center en \u00e9cran g\u00e9ant. Les chercheurs de l\u2019EPFL ont utilis\u00e9 l\u2019effet dit \u00abcaustique\u00bb en r\u00e9flexion, composant ainsi des projections lumineuses qui se m\u00e9tamorphosent et se d\u00e9placent en fonction du temps et des [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/batijournal.com\/index.php\/des-plaques-daluminium-creent-des-projections-qui-saniment-avec-le-ciel\/88120\/\" \/>\n<meta property=\"og:site_name\" content=\"Batijournal\" \/>\n<meta property=\"article:published_time\" content=\"2015-06-26T04:23:04+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2019-07-15T09:21:51+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/batijournal.com\/wp-content\/uploads\/2015\/06\/81cac23b.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1024\" \/>\n\t<meta property=\"og:image:height\" content=\"584\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"St\u00e9phane Miget\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@bati_journal\" \/>\n<meta name=\"twitter:site\" content=\"@bati_journal\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"St\u00e9phane Miget\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/batijournal.com\\\/index.php\\\/des-plaques-daluminium-creent-des-projections-qui-saniment-avec-le-ciel\\\/88120\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/batijournal.com\\\/index.php\\\/des-plaques-daluminium-creent-des-projections-qui-saniment-avec-le-ciel\\\/88120\\\/\"},\"author\":{\"name\":\"St\u00e9phane Miget\",\"@id\":\"https:\\\/\\\/batijournal.com\\\/#\\\/schema\\\/person\\\/1dc96ec6957aa1ccb25ebe78bb19f100\"},\"headline\":\"Des plaques d&rsquo;aluminium cr\u00e9ent des projections qui s&rsquo;animent avec le ciel\",\"datePublished\":\"2015-06-26T04:23:04+00:00\",\"dateModified\":\"2019-07-15T09:21:51+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/batijournal.com\\\/index.php\\\/des-plaques-daluminium-creent-des-projections-qui-saniment-avec-le-ciel\\\/88120\\\/\"},\"wordCount\":433,\"image\":{\"@id\":\"https:\\\/\\\/batijournal.com\\\/index.php\\\/des-plaques-daluminium-creent-des-projections-qui-saniment-avec-le-ciel\\\/88120\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/batijournal.com\\\/wp-content\\\/uploads\\\/2015\\\/06\\\/81cac23b.jpg\",\"keywords\":[\"innovation\",\"recherche\"],\"articleSection\":[\"Architecture &amp; 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