{"id":2585,"date":"2021-12-06T16:47:42","date_gmt":"2021-12-06T15:47:42","guid":{"rendered":"https:\/\/parlonstechs.com\/all\/?p=2585"},"modified":"2021-12-06T16:47:42","modified_gmt":"2021-12-06T15:47:42","slug":"cette-camera-est-plus-petite-quun-grain-de-riz","status":"publish","type":"post","link":"https:\/\/parlonstechs.com\/all\/2021\/12\/06\/cette-camera-est-plus-petite-quun-grain-de-riz\/","title":{"rendered":"Cette cam\u00e9ra est plus petite qu\u2019un grain de riz !"},"content":{"rendered":"\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/cdn.futura-sciences.com\/buildsv6\/images\/largeoriginal\/d\/5\/a\/d5a9854be5_50183904_camera-metasurface-neural-nano-optics.jpg\" alt=\"Cette cam\u00e9ra est plus petite qu&#39;un grain de riz !\"\/><\/figure>\n\n\n\n<p style=\"font-size:28px\"><strong>Des chercheurs ont r\u00e9ussi \u00e0 cr\u00e9er un appareil photo miniaturis\u00e9, ultracompact, capable de prendre des clich\u00e9s en haute d\u00e9finition et en couleur. En faisant appel \u00e0 une m\u00e9tasurface plut\u00f4t qu&rsquo;une optique classique, ils ont r\u00e9ussi \u00e0 r\u00e9duire la cam\u00e9ra \u00e0 la taille d&rsquo;un gros grain de sel.<\/strong><\/p>\n\n\n\n<p>Des cam\u00e9ras miniaturis\u00e9es pourraient r\u00e9volutionner la m\u00e9decine en permettant aux m\u00e9decins de voir beaucoup plus facilement \u00e0 l&rsquo;int\u00e9rieur du corps humain. \u00c0 cette fin, des chercheurs des universit\u00e9s de Princeton et de Washington sont parvenus \u00e0 cr\u00e9er une cam\u00e9ra de la taille d&rsquo;un grain de riz. Publi\u00e9 dans la revue\u00a0<em>Nature Communications<\/em>, leur article d\u00e9taille leur invention bas\u00e9e sur des m\u00e9tamat\u00e9riaux.<\/p>\n\n\n\n<p>Les chercheurs ont cr\u00e9\u00e9 une m\u00e9tasurface qui capte la lumi\u00e8re gr\u00e2ce \u00e0 1,6 million\u00a0de nano-antennes optiques. Chacune doit avoir sa propre g\u00e9om\u00e9trie unique pour former correctement le front d&rsquo;onde optique. La conception de la m\u00e9tasurface a n\u00e9cessit\u00e9 des simulations complexes, utilisant \u00ab\u00a0<em>des quantit\u00e9s massives de m\u00e9moire et de temps\u00a0<\/em>\u00bb, pour tester de nombreuses configurations diff\u00e9rentes des nano-antennes.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Une cam\u00e9ra 550.000 fois plus petite qu\u2019un appareil conventionnel<\/h2>\n\n\n\n<p>En plus des simulations, les chercheurs ont cr\u00e9\u00e9 leur propre algorithme de d\u00e9convolution afin de reconstruire correctement l&rsquo;image obtenue. Le r\u00e9sultat est une cam\u00e9ra qui mesure seulement 0,5 mm d&rsquo;\u00e9paisseur et qui est capable de prendre des photos d&rsquo;une qualit\u00e9 similaire \u00e0 une cam\u00e9ra conventionnelle tout en \u00e9tant 550.000 fois plus petite en volume. Ce n&rsquo;est pas la premi\u00e8re cam\u00e9ra con\u00e7ue autour d&rsquo;une m\u00e9tasurface, mais les r\u00e9sultats pr\u00e9c\u00e9dents \u00e9taient de bien moindre qualit\u00e9.<\/p>\n\n\n\n<p>En plus de r\u00e9duire la taille des outils pour l&rsquo;endoscopie, les chercheurs imaginent utiliser la m\u00eame technique pour transformer des surfaces en capteurs. Cela permettrait, par exemple, de convertir la coque arri\u00e8re d&rsquo;un smartphone en cam\u00e9ra g\u00e9ante et d&rsquo;\u00e9liminer ainsi le module photo traditionnel.<\/p>\n\n\n\n<p>futura<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Des chercheurs ont r\u00e9ussi \u00e0 cr\u00e9er un appareil photo miniaturis\u00e9, ultracompact, capable de prendre des clich\u00e9s en haute d\u00e9finition et en couleur. En faisant appel \u00e0 une m\u00e9tasurface plut\u00f4t qu&rsquo;une [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":2587,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[21,172],"tags":[],"class_list":["post-2585","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualite","category-robotique"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Cette cam\u00e9ra est plus petite qu\u2019un grain de riz ! - Parlons Techs - Store<\/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:\/\/parlonstechs.com\/all\/2021\/12\/06\/cette-camera-est-plus-petite-quun-grain-de-riz\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Cette cam\u00e9ra est plus petite qu\u2019un grain de riz ! - Parlons Techs - Store\" \/>\n<meta property=\"og:description\" content=\"Des chercheurs ont r\u00e9ussi \u00e0 cr\u00e9er un appareil photo miniaturis\u00e9, ultracompact, capable de prendre des clich\u00e9s en haute d\u00e9finition et en couleur. 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