{"id":237036,"date":"2021-04-26T12:23:12","date_gmt":"2021-04-26T10:23:12","guid":{"rendered":"https:\/\/adalit.com\/fr\/?p=237036"},"modified":"2021-04-26T12:23:22","modified_gmt":"2021-04-26T10:23:22","slug":"comment-mesurer-la-lumiere","status":"publish","type":"post","link":"https:\/\/adalit.com\/fr\/2021\/04\/26\/comment-mesurer-la-lumiere\/","title":{"rendered":"Comment mesurer la lumi\u00e8re ?"},"content":{"rendered":"<p>[et_pb_section fb_built=\u00a0\u00bb1&Prime; _builder_version=\u00a0\u00bb4.8.2&Prime; _module_preset=\u00a0\u00bbdefault\u00a0\u00bb][et_pb_row _builder_version=\u00a0\u00bb4.8.2&Prime; _module_preset=\u00a0\u00bbdefault\u00a0\u00bb][et_pb_column _builder_version=\u00a0\u00bb4.8.2&Prime; _module_preset=\u00a0\u00bbdefault\u00a0\u00bb type=\u00a0\u00bb4_4&Prime;][et_pb_text _builder_version=\u00a0\u00bb4.8.2&Prime; _module_preset=\u00a0\u00bbdefault\u00a0\u00bb text_font_size=\u00a0\u00bb16px\u00a0\u00bb hover_enabled=\u00a0\u00bb0&Prime; sticky_enabled=\u00a0\u00bb0&Prime;]<\/p>\n<p>En nous basant sur trois aspects sp\u00e9cifiques pour mesurer la lumi\u00e8re selon le Syst\u00e8me International d&rsquo;Unit\u00e9s, et sur la distance du faisceau, nous pouvons faire des comparaisons entre des mod\u00e8les de lampes torches et d\u00e9chiffrer quel type de lumi\u00e8re nous obtiendrons.<\/p>\n<p>[\/et_pb_text][et_pb_text _builder_version=\u00a0\u00bb4.8.2&Prime; _module_preset=\u00a0\u00bbdefault\u00a0\u00bb text_font_size=\u00a0\u00bb16px\u00a0\u00bb hover_enabled=\u00a0\u00bb0&Prime; sticky_enabled=\u00a0\u00bb0&Prime;]<\/p>\n<p><strong>Lumen (Lm)<\/strong>:\u00a0c&rsquo;est l\u2019unit\u00e9 servant \u00e0 mesurer le <strong>flux lumineux<\/strong> \u00e9mis par une source de lumi\u00e8re, c\u2019est-\u00e0-dire <strong>la quantit\u00e9 totale de lumi\u00e8re<\/strong> visible \u00e9mise par une source. Les lumens ne tiennent pas compte de l\u2019angle d\u2019\u00e9mission de la lumi\u00e8re. Il est d\u00e9fini comme le flux lumineux \u00e0 la <strong>puissance<\/strong> (W) \u00e9mise sous forme de rayonnement lumineux auquel l\u2019\u0153il humain est sensible.<\/p>\n<p>[\/et_pb_text][et_pb_text _builder_version=\u00a0\u00bb4.8.2&Prime; _module_preset=\u00a0\u00bbdefault\u00a0\u00bb text_font_size=\u00a0\u00bb16px\u00a0\u00bb hover_enabled=\u00a0\u00bb0&Prime; sticky_enabled=\u00a0\u00bb0&Prime;]<\/p>\n<p><strong>Candela (Cd)<\/strong>:\u00a0c&rsquo;est l\u2019unit\u00e9 qui mesure <strong>l\u2019intensit\u00e9 lumineuse<\/strong>, d\u00e9finie comme le flux lumineux \u00e9mis par unit\u00e9 d\u2019angle solide dans une direction donn\u00e9e. Une candela est \u00e9gale \u00e0 1 lumen par st\u00e9r\u00e9oradian (lm\/sr). C\u2019est l\u2019\u00e9quivalent de la mesure de la quantit\u00e9 de lumi\u00e8re dans une direction donn\u00e9e, ce qui est li\u00e9 \u00e0 l\u2019angle d\u2019ouverture du faisceau lumineux.<\/p>\n<p>[\/et_pb_text][et_pb_text _builder_version=\u00a0\u00bb4.8.2&Prime; _module_preset=\u00a0\u00bbdefault\u00a0\u00bb text_font_size=\u00a0\u00bb16px\u00a0\u00bb hover_enabled=\u00a0\u00bb0&Prime; sticky_enabled=\u00a0\u00bb0&Prime;]<\/p>\n<p><strong>Lux (Lx)<\/strong>:\u00a0c&rsquo;est l\u2019unit\u00e9 servant \u00e0 mesurer le <strong>niveau d\u2019\u00e9clairage ou d\u2019\u00e9clairement<\/strong>, c\u2019est-\u00e0-dire \u00e0 mesurer le flux de lumi\u00e8re projet\u00e9 par une source sur une surface situ\u00e9e \u00e0 une certaine distance. Les lux doivent \u00eatre accompagn\u00e9s de la distance \u00e0 laquelle ils sont mesur\u00e9s (par exemple, Lux \u00e0 1m, \u00e0 5m, etc). Un lux \u00e9quivaut \u00e0 un lumen\/m2.<\/p>\n<p>[\/et_pb_text][et_pb_text _builder_version=\u00a0\u00bb4.8.2&Prime; _module_preset=\u00a0\u00bbdefault\u00a0\u00bb text_font_size=\u00a0\u00bb16px\u00a0\u00bb hover_enabled=\u00a0\u00bb0&Prime; sticky_enabled=\u00a0\u00bb0&Prime;]<\/p>\n<p><strong>Lux vs Lumen<\/strong>: la diff\u00e9rence entre lux et lumen est que le lux prend en compte la surface sur laquelle le flux lumineux est distribu\u00e9.<\/p>\n<p>[\/et_pb_text][et_pb_text _builder_version=\u00a0\u00bb4.8.2&Prime; _module_preset=\u00a0\u00bbdefault\u00a0\u00bb text_font_size=\u00a0\u00bb16px\u00a0\u00bb hover_enabled=\u00a0\u00bb0&Prime; sticky_enabled=\u00a0\u00bb0&Prime;]<\/p>\n<p><strong>Distance du faisceau<\/strong>: c&rsquo;est la distance dont l&rsquo;intensit\u00e9 de la lumi\u00e8re atteint .25 Lux (l\u2019\u00e9quivalent de la lumi\u00e8re d\u2019une pleine lune). C&rsquo;est donn\u00e9 en metres.<\/p>\n<p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Au moment de choisir une lampe torche, il y a plusieurs param\u00e8tres cl\u00e9s et, \u00e9videmment, l\u2019un des plus importants est la lumi\u00e8re qu\u2019elle \u00e9met. <\/p>\n","protected":false},"author":2,"featured_media":237037,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[121],"tags":[],"class_list":["post-237036","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-info-technique"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Comment mesurer la lumi\u00e8re ? - ADALIT<\/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:\/\/adalit.com\/fr\/2021\/04\/26\/comment-mesurer-la-lumiere\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Comment mesurer la lumi\u00e8re ? 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