{"id":13582,"date":"2023-08-14T03:15:35","date_gmt":"2023-08-14T03:15:35","guid":{"rendered":"https:\/\/staging.rayzeek.com\/?p=13582"},"modified":"2023-12-26T08:39:00","modified_gmt":"2023-12-26T08:39:00","slug":"what-is-luminance-ratio","status":"publish","type":"post","link":"https:\/\/staging.rayzeek.com\/fr\/glossary\/what-is-luminance-ratio\/","title":{"rendered":"Qu'est-ce que le rapport de luminance ?"},"content":{"rendered":"

Qu'est-ce que le rapport de luminance ?<\/h2>\n\n\n

Le rapport de luminance est le rapport entre la luminance moyenne et la luminance de la fen\u00eatre. Il sert d'indicateur du contraste de brillance entre une source de lumi\u00e8re naturelle et l'ensemble du champ visuel. Ce rapport est utilis\u00e9 comme variable dans des mod\u00e8les qui analysent et comparent la performance des syst\u00e8mes d'\u00e9clairage, en tenant compte de facteurs tels que l'\u00e9clairement vertical, la position de l'ombrage et le rapport de luminance.<\/p>\n

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Le rapport de luminance est utile pour \u00e9valuer la performance optique et la qualit\u00e9 des syst\u00e8mes d'\u00e9clairage ainsi que des dispositifs \u00e9lectroniques, en particulier les \u00e9crans. Il est utilis\u00e9 comme param\u00e8tre dans les tests de rapport de luminance, de couleur et d'uniformit\u00e9. En \u00e9valuant le rapport de luminance, il est possible de d\u00e9terminer la lisibilit\u00e9 et le confort visuel d'un \u00e9cran, en prenant en compte la brillance de la lumi\u00e8re ambiante par rapport \u00e0 la brillance de l'\u00e9cran.<\/p>\n\n\n\n

De plus, le rapport de luminance est essentiel pour comprendre le contraste per\u00e7u et le confort visuel. Par exemple, dans le cas d'une symbologie claire sur fond fonc\u00e9, le rapport de luminance entre le fond et les pixels les plus lumineux constituant le symbole influe sur le contraste per\u00e7u. Les directives recommandent des rapports de luminance sp\u00e9cifiques entre les objets et leurs fonds selon le degr\u00e9 de saillance ou de visibilit\u00e9 souhait\u00e9, soulignant ainsi le r\u00f4le du rapport de luminance dans l'am\u00e9lioration de la visibilit\u00e9 et du confort visuel.<\/p>\n

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En outre, le rapport de luminance constitue \u00e9galement un facteur d'\u00e9valuation de la non-uniformit\u00e9 et des m\u00e9triques d'\u00e9clairage int\u00e9rieur. L'Illuminating Engineering Society of North America (IESNA) a \u00e9tabli des directives qui d\u00e9finissent les niveaux acceptables de non-uniformit\u00e9 \u00e0 l'aide de rapports de luminance entre les surfaces situ\u00e9es dans le champ de vision. La repr\u00e9sentation pr\u00e9cise des distributions de luminance des fen\u00eatres et des rapports de luminance int\u00e9rieure est cruciale pour \u00e9valuer le confort visuel et les m\u00e9triques de performance au moyen de techniques telles que l'\u00e9clairage bas\u00e9 sur l'image (IBL).<\/p>","protected":false},"excerpt":{"rendered":"

Contact us for complete PIR motion sensors, motion-activated energy-saving products, motion sensor switches, and Occupancy\/Vacancy commercial solutions.Send an EmailContact Form<\/d<\/p>","protected":false},"author":4,"featured_media":12865,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"article_term":"","article_term_alternate":"","article_term_def":"","article_hook":"","auto_links":"[{\"keyword\": \"IESNA\", \"idxall\": 0, \"keywordtitlesimi\": 0.9568374156951904, \"keywordslugsimi\": 0.9568374156951904, \"paratitlesimi\": 0.5771031379699707, \"paraslugsimi\": 0.5771031379699707, \"slug\": \"what-is-iesna\", \"title\": \"What is IESNA\", \"id\": 14130}, {\"keyword\": \"visual field\", \"idxall\": 0, \"keywordtitlesimi\": 0.9420757293701172, \"keywordslugsimi\": 0.9420757293701172, \"paratitlesimi\": 0.6256347298622131, \"paraslugsimi\": 0.6256347298622131, \"slug\": \"what-is-visual-field\", \"title\": \"What is Visual 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