{"id":731,"date":"2013-12-20T01:11:53","date_gmt":"2013-12-20T00:11:53","guid":{"rendered":"http:\/\/www.proof.de\/?post_type=encyclopedia&#038;p=731"},"modified":"2023-08-19T00:47:17","modified_gmt":"2023-08-18T22:47:17","slug":"kelvin","status":"publish","type":"encyclopedia","link":"https:\/\/proof.proofen.de\/fr\/lexique-9\/kelvin\/","title":{"rendered":"Kelvin"},"content":{"rendered":"<div class=\"kk-star-ratings kksr-auto kksr-align-right kksr-valign-top\" data-payload='{\"align\":\"right\",\"id\":\"731\",\"slug\":\"default\",\"valign\":\"top\",\"ignore\":\"\",\"reference\":\"auto\",\"class\":\"\",\"count\":\"0\",\"legendonly\":\"\",\"readonly\":\"\",\"score\":\"0\",\"starsonly\":\"\",\"best\":\"5\",\"gap\":\"5\",\"greet\":\"Jetzt bewerten\",\"legend\":\"0\\\/5 - (0 votes)\",\"size\":\"24\",\"title\":\"Kelvin\",\"width\":\"0\",\"_legend\":\"{score}\\\/{best} - ({count} {votes})\",\"font_factor\":\"1.25\"}'>\n            \n<div class=\"kksr-stars\">\n    \n<div class=\"kksr-stars-inactive\">\n            <div class=\"kksr-star\" data-star=\"1\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"2\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"3\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"4\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"5\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n    <\/div>\n    \n<div class=\"kksr-stars-active\" style=\"width: 0px;\">\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n    <\/div>\n<\/div>\n                \n\n<div class=\"kksr-legend\" style=\"font-size: 19.2px;\">\n            <span class=\"kksr-muted\">\u00c9valuer maintenant<\/span>\n    <\/div>\n    <\/div>\n<p>Le kelvin est une unit\u00e9 de temp\u00e9rature absolue utilis\u00e9e en science.<\/p>\n<p class=\"translation-block\">La <a href=\"https:\/\/proof.proofen.de\/es\/lexico-2\/temperatura-de-color\/\" target=\"_self\" class=\"encyclopedia tooltipstered\">temp\u00e9rature de couleur<\/a> d'une source lumineuse, d'un \u00e9cran ou d'une image, exprim\u00e9e en kelvin d<a href=\"https:\/\/proof.proofen.de\/es\/lexico-2\/efi\/\" target=\"_self\" class=\"encyclopedia tooltipstered\">efi<\/a>, correspond \u00e0 la temp\u00e9rature d'un objet parfaitement noir s'il \u00e9tait incandescent dans cette blancheur. Voici une explication plus pr\u00e9cise :<\/p>\n<h3>Emetteur noir et loi de Planck sur le rayonnement :<\/h3>\n<p>Un corps noir est un objet hypoth\u00e9tique qui \u00e9met un rayonnement \u00e9lectromagn\u00e9tique en fonction de sa temp\u00e9rature. Max Planck a d\u00e9velopp\u00e9 la loi de Planck sur le rayonnement pour d\u00e9crire les propri\u00e9t\u00e9s de rayonnement d'un \u00e9metteur noir. Cette loi stipule que la distribution spectrale du rayonnement \u00e9mis d\u00e9pend de la temp\u00e9rature du corps noir. \u00c0 des temp\u00e9ratures plus \u00e9lev\u00e9es, l'\u00e9metteur noir \u00e9met plus d'\u00e9nergie \u00e0 des longueurs d'onde plus courtes (fr\u00e9quences plus \u00e9lev\u00e9es), ce qui donne \u00e0 la lumi\u00e8re un aspect bleut\u00e9. \u00c0 des temp\u00e9ratures plus basses, l'\u00e9mission est plus importante \u00e0 des longueurs d'onde plus longues (fr\u00e9quences plus basses), ce qui fait appara\u00eetre la lumi\u00e8re rouge\u00e2tre.<\/p>\n<h3>Application aux sources lumineuses r\u00e9elles :<\/h3>\n<p>En pratique, les sources lumineuses r\u00e9elles telles que les ampoules, les lampes fluorescentes, la lumi\u00e8re du jour, etc. ne peuvent pas \u00eatre consid\u00e9r\u00e9es comme des \u00e9metteurs noirs parfaits. N\u00e9anmoins, en utilisant la loi de Planck sur le rayonnement, nous pouvons d\u00e9finir une temp\u00e9rature qui d\u00e9crit la teinte de la lumi\u00e8re que cette source aurait si elle \u00e9mettait un rayonnement noir id\u00e9al. Cette temp\u00e9rature d\u00e9finie est mesur\u00e9e en kelvins et est appel\u00e9e \"temp\u00e9rature de la lumi\u00e8re\".<\/p>\n<h3>Temp\u00e9ratures de couleur dans la pratique :<\/h3>\n<p>L'utilisation de l'unit\u00e9 Kelvin pour mesurer la temp\u00e9rature de la lumi\u00e8re permet de d\u00e9crire les sources lumineuses de mani\u00e8re standardis\u00e9e et objective. Les sources lumineuses avec des valeurs Kelvin inf\u00e9rieures (par exemple 2000 K - 3000 K) sont per\u00e7ues comme \"chaudes\" ou rouge\u00e2tres, tandis que les sources lumineuses avec des valeurs Kelvin sup\u00e9rieures (par exemple 5000 K - 6500 K) apparaissent comme \"froides\" ou bleut\u00e9es.<\/p>\n<h3>Applications :<\/h3>\n<p>L'utilisation du kelvin pour d\u00e9crire la temp\u00e9rature de la lumi\u00e8re est importante dans de nombreux domaines. En photographie et en production vid\u00e9o, le choix de la bonne temp\u00e9rature de lumi\u00e8re peut influencer l'ambiance et l'atmosph\u00e8re d'une image. Dans le domaine de l'\u00e9clairage, l'utilisation des valeurs Kelvin aide \u00e0 s\u00e9lectionner les sources lumineuses qui produisent la qualit\u00e9 de couleur et l'atmosph\u00e8re souhait\u00e9es. Dans le site <a href=\"https:\/\/proof.proofen.de\/fr\/lexique-9\/gestion-des-couleurs-3\/\" target=\"_self\" title=\"La gestion des couleurs a pour but de reproduire les couleurs de la mani\u00e8re la plus similaire possible sur les diff\u00e9rents appareils tels que les appareils photo, les scanners, les moniteurs, les imprimantes laser, \u00e0 jet d&#039;encre, offset et bien d&#039;autres.\" class=\"encyclopedia\">Gestion des couleurs<\/a> la prise en compte de la temp\u00e9rature de la lumi\u00e8re permet une reproduction exacte des couleurs sur diff\u00e9rents \u00e9crans et imprimantes. La lumi\u00e8re du jour est d\u00e9finie par 6.500 kelvins, pour l'impression, la norme europ\u00e9enne est le <a href=\"https:\/\/proof.proofen.de\/fr\/lexique-9\/d50\/\" target=\"_self\" title=\"D50 est la lumi\u00e8re standard de l&#039;industrie de l&#039;impression. Seule la lumi\u00e8re standard D50 permet de r\u00e9aliser des \u00e9preuves aux couleurs fid\u00e8les,\" class=\"encyclopedia\">D50<\/a> <a href=\"https:\/\/proof.proofen.de\/fr\/lexique-9\/lumiere-normale\/\" target=\"_self\" title=\"La lumi\u00e8re standard d\u00e9signe des conditions d&#039;\u00e9clairage d\u00e9finies sous lesquelles les observateurs peuvent observer et \u00e9valuer les impressions ou les objets de mani\u00e8re uniforme. L&#039;illuminant standard le plus important est D50 pour les graphistes (temp\u00e9rature de couleur : 5.000 Kelvin).\" class=\"encyclopedia\">Lumi\u00e8re normale<\/a> une temp\u00e9rature de couleur de 5 000 kelvins. Les moniteurs utilis\u00e9s pour l'\u00e9dition d'images sont g\u00e9n\u00e9ralement calibr\u00e9s \u00e0 5 800 kelvins, car cette valeur l\u00e9g\u00e8rement plus \"froide\" s'est av\u00e9r\u00e9e plus pratique pour la correspondance des couleurs que les 5 000 kelvins purs, relativement jaun\u00e2tres.<\/p>\n<p>Dans l'ensemble, l'utilisation du kelvin pour mesurer la temp\u00e9rature de la lumi\u00e8re offre une m\u00e9thode pratique et standardis\u00e9e pour d\u00e9crire et contr\u00f4ler la couleur des sources lumineuses, ce qui est tr\u00e8s important dans de nombreux domaines de la perception visuelle et de la technologie.<\/p>\n<p>Le mot \"degr\u00e9\" n'est d'ailleurs pas utilis\u00e9 dans le contexte du kelvin. Une temp\u00e9rature de 5 000 kelvins ne s'appelle pas \"5 000 degr\u00e9s Kelvin\", mais seulement 5 000 kelvins ou \"5 000 K\".<\/p>","protected":false},"excerpt":{"rendered":"<p>Le kelvin est une unit\u00e9 de temp\u00e9rature absolue utilis\u00e9e dans le domaine scientifique. La lumi\u00e8re du jour est d\u00e9finie par 6500 kelvins. Pour l'impression, la temp\u00e9rature de couleur est de 5000 kelvins en Europe avec la lumi\u00e8re standard D50.<\/p>","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","template":"","meta":{"inline_featured_image":false,"footnotes":""},"class_list":["post-731","encyclopedia","type-encyclopedia","status-publish","hentry","no-featured-image-padding"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.0.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"Kelvin ist eine absolute Temperatureinheit. 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