{"id":70748,"date":"2025-07-22T12:08:43","date_gmt":"2025-07-22T10:08:43","guid":{"rendered":"https:\/\/www.he-arc.ch\/?post_type=he-arc_project&#038;p=70748"},"modified":"2025-07-22T12:08:45","modified_gmt":"2025-07-22T10:08:45","slug":"sphaira","status":"publish","type":"he-arc_project","link":"https:\/\/www.he-arc.ch\/en\/projets-recherche\/sphaira\/","title":{"rendered":"Sphaira"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">Objectifs<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Ce projet vise \u00e0 d\u00e9velopper un codeur optique permettant de mesurer des angles de rotation dans les 3 degr\u00e9s de libert\u00e9, avec des pr\u00e9cisions de l\u2019ordre de la seconde d\u2019arc.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Le principe est bas\u00e9e sur une cam\u00e9ra miniature, mesurant le d\u00e9placement d\u2019une figure de \u00abspeckles\u00bb g\u00e9n\u00e9r\u00e9e par la diffraction de la lumi\u00e8re sur une sph\u00e8re en verre, dont une des h\u00e9misph\u00e8res est d\u00e9polie et r\u00e9fl\u00e9chissante.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"605\" height=\"189\" src=\"https:\/\/www.he-arc.ch\/wp-content\/uploads\/2025\/07\/hearc_ingenierie_sphaira_1.jpg\" alt=\"\" class=\"wp-image-70731\" srcset=\"https:\/\/www.he-arc.ch\/wp-content\/uploads\/2025\/07\/hearc_ingenierie_sphaira_1.jpg 605w, https:\/\/www.he-arc.ch\/wp-content\/uploads\/2025\/07\/hearc_ingenierie_sphaira_1-300x94.jpg 300w\" sizes=\"(max-width: 605px) 100vw, 605px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Partenaires et financement<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/hexagon.com\/\" target=\"_blank\" rel=\"noreferrer noopener\">Hexagon Technology Center<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Financ\u00e9 par <a href=\"https:\/\/www.innosuisse.ch\/inno\/fr\/home.html\" target=\"_blank\" rel=\"noreferrer noopener\">InnoSuisse &#8211; Agence suisse pour l&#8217;encouragement de l&#8217;innovation<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">R\u00e9sultats<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Un prototype fonctionnel du codeur (bas\u00e9 sur le concept b de la figure ci-dessus) a \u00e9t\u00e9 r\u00e9alis\u00e9 dans le cadre du projet, avec les performances suivantes:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Dans deux degr\u00e9s de libert\u00e9: pr\u00e9cision obtenue &lt; 5 secondes d\u2019arc (1.4 mdeg)\u200b<\/li>\n\n\n\n<li>Dans le troisi\u00e8me degr\u00e9 de libert\u00e9 (rotation autour de l\u2019axe optique): 6 mdeg<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Les performances du codeur pourraient \u00eatre davantage am\u00e9lior\u00e9es gr\u00e2ce \u00e0 un prisme permettant de cr\u00e9er deux champs de vision s\u00e9par\u00e9s.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"605\" height=\"169\" src=\"https:\/\/www.he-arc.ch\/wp-content\/uploads\/2025\/07\/hearc_ingenierie_sphaira_2.jpg\" alt=\"\" class=\"wp-image-70729\" srcset=\"https:\/\/www.he-arc.ch\/wp-content\/uploads\/2025\/07\/hearc_ingenierie_sphaira_2.jpg 605w, https:\/\/www.he-arc.ch\/wp-content\/uploads\/2025\/07\/hearc_ingenierie_sphaira_2-300x84.jpg 300w, https:\/\/www.he-arc.ch\/wp-content\/uploads\/2025\/07\/hearc_ingenierie_sphaira_2-600x169.jpg 600w\" sizes=\"(max-width: 605px) 100vw, 605px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Chef de projet<\/h2>\n\n\n\n<div id=\"contact-card-block_17a2857c09f66704792a73b33cbcf170\" class=\"contact-card is-shadowed mb-2-5 is-not-contained\">\n  <div class=\"contact-card__inner\">\n                <div class=\"contact-entry mb-1\">\n        Yves Salvad\u00e9\n      <\/div>\n                      <div class=\"contact-entry mb-1\">\n        <a href=\"tel:+41329302246\"  class=\"simple-link contact-entry mb-1\">+41 32 930 22 46<\/a>\n      <\/div>\n                      <div class=\"contact-entry \">\n        <a href=\"mailto:Yves.Salvade@he-arc.ch\"  class=\"simple-link contact-entry mb-1\">Yves.Salvade@he-arc.ch<\/a>\n      <\/div>\n            <\/div>\n<\/div>\n","protected":false},"author":6,"featured_media":70731,"template":"","he-arc_domain":[3],"he-arc_project_skill":[62],"he-arc_project_year":[39,40,41,42],"class_list":["post-70748","he-arc_project","type-he-arc_project","status-publish","has-post-thumbnail","hentry","he-arc_domain-ingenierie","he-arc_project_skill-metrologie-et-vision-industrielle","he-arc_project_year-39","he-arc_project_year-40","he-arc_project_year-41","he-arc_project_year-42"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Sphaira - Haute-Ecole Arc<\/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:\/\/www.he-arc.ch\/en\/projets-recherche\/sphaira\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Sphaira - Haute-Ecole Arc\" \/>\n<meta property=\"og:description\" content=\"Objectifs Ce projet vise \u00e0 d\u00e9velopper un codeur optique permettant de mesurer des angles de rotation dans les 3 degr\u00e9s de libert\u00e9, avec des pr\u00e9cisions de l\u2019ordre de la seconde d\u2019arc. 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