{"id":13540,"date":"2023-08-07T04:24:21","date_gmt":"2023-08-07T04:24:21","guid":{"rendered":"https:\/\/www.rayzeek.com\/?p=13540"},"modified":"2023-12-26T08:38:24","modified_gmt":"2023-12-26T08:38:24","slug":"what-is-cut-off-angle-of-a-luminaire","status":"publish","type":"post","link":"https:\/\/www.rayzeek.com\/fr\/glossaire\/quel-est-langle-de-coupure-dun-luminaire","title":{"rendered":"Qu'est-ce que l'angle de coupure (d'un luminaire) ?"},"content":{"rendered":"

Qu'est-ce que l'angle de coupure (d'un luminaire) ?<\/h2>

L'angle de coupure d'un luminaire est l'angle auquel la lumi\u00e8re \u00e9mise par un luminaire est dirig\u00e9e et contr\u00f4l\u00e9e. Il est mesur\u00e9 du point le plus bas vers le haut, entre l'axe vertical et la premi\u00e8re rang\u00e9e o\u00f9 la source lumineuse nue (lampe) n'est pas visible. L'angle de coupure permet de d\u00e9terminer le niveau d'\u00e9blouissement et de confort visuel offert par le luminaire.<\/p>

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Rubans lumineux \u00e0 d\u00e9tecteur de mouvement<\/p><\/a><\/div><\/div>

D\u00e9tecteurs de mouvement\/d\u00e9tecteurs d'intensit\u00e9 \u00e0 basse tension \u00e0 courant continu<\/p><\/a><\/div><\/div>

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L'Illuminating Engineering Society (IES) d\u00e9finit un luminaire \u00e0 angle de coupure comme ayant des seuils d'intensit\u00e9 sp\u00e9cifiques \u00e0 certains angles ou au-dessus de certains angles. Par exemple, un luminaire \u00e0 angle de coupure complet bloque compl\u00e8tement l'\u00e9mission de lumi\u00e8re au-dessus du plan horizontal, minimisant ainsi la pollution lumineuse et r\u00e9duisant l'\u00e9blouissement. En revanche, un luminaire \u00e0 angle semi-coup\u00e9 permet l'\u00e9mission d'une petite quantit\u00e9 de lumi\u00e8re au-dessus du plan horizontal, ce qui permet de trouver un \u00e9quilibre entre le contr\u00f4le de la diffusion de la lumi\u00e8re et la distribution d'une certaine quantit\u00e9 de lumi\u00e8re vers le haut. Enfin, un luminaire \u00e0 angle non coup\u00e9 n'a aucune restriction sur la distribution de la lumi\u00e8re et \u00e9met de la lumi\u00e8re dans toutes les directions.<\/p>

L'angle de coupure sp\u00e9cifique et ses variations peuvent varier en fonction de l'application et des normes d'\u00e9clairage. Diff\u00e9rents appareils d'\u00e9clairage peuvent avoir des angles de coupure diff\u00e9rents en fonction de leur conception et de l'usage auquel ils sont destin\u00e9s.<\/p>

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Questions fr\u00e9quemment pos\u00e9es<\/h2>\n\n

Quelle est la d\u00e9finition d'un luminaire \u00e0 coupure ?<\/h3><\/div><\/div>\n\n

Un luminaire \u00e0 coupure, \u00e9galement appel\u00e9 luminaire \u00e0 coupure, est un type d'appareil d'\u00e9clairage qui pr\u00e9sente une distribution lumineuse sp\u00e9cifique. Dans ce type de luminaire, la puissance en bougies ne d\u00e9passe pas 2,5% de la puissance lumineuse initiale nominale des lampes \u00e0 un angle de 90 degr\u00e9s au-dessus du nadir. En outre, elle ne d\u00e9passe pas 10% du flux lumineux initial nominal des lampes \u00e0 un angle vertical de 80 degr\u00e9s au-dessus du nadir.<\/p><\/div><\/div><\/div><\/div>\n\n

Que signifie \"Full Cut Off\" ?<\/h3><\/div><\/div>\n\n

On parle de coupure totale lorsque la lumi\u00e8re \u00e9mise par le luminaire ne d\u00e9passe pas le fond de celui-ci.<\/p><\/div><\/div><\/div><\/div>\n\n

Quelle est la diff\u00e9rence entre la semi-coupure et la coupure totale ?<\/h3><\/div><\/div>\n\n

Les appliques traditionnelles diffusent la lumi\u00e8re dans toutes les directions, tandis que les appliques semi-coup\u00e9es dirigent la lumi\u00e8re vers le bas et vers l'ext\u00e9rieur. D'autre part, les blocs muraux \u00e0 coupure totale limitent la distribution de la lumi\u00e8re au-dessous du luminaire. Les blocs muraux \u00e0 coupure totale sont con\u00e7us pour se conformer aux r\u00e9glementations relatives au ciel \u00e9toil\u00e9 et minimiser efficacement l'intrusion de la lumi\u00e8re et la pollution lumineuse.<\/p><\/div><\/div><\/div><\/div>\n\n

Qu'est-ce que l'angle de coupe ?<\/h3><\/div><\/div>\n\n

L'angle de coupure est l'angle auquel la source lumineuse nue n'est plus visible, mesur\u00e9 \u00e0 partir du point le plus bas entre une ligne verticale partant du centre du feu \u00e9tendu au sol et la premi\u00e8re ligne de vis\u00e9e.<\/p><\/div><\/div><\/div><\/div>\n\n

Pourquoi les luminaires enti\u00e8rement blind\u00e9s sont-ils recommand\u00e9s ?<\/h3><\/div><\/div>\n\n

Un luminaire enti\u00e8rement blind\u00e9 est con\u00e7u de mani\u00e8re \u00e0 ce que la source lumineuse ne soit pas visible pour les personnes ou les animaux sauvages \u00e0 proximit\u00e9. En utilisant un \u00e9clairage enti\u00e8rement prot\u00e9g\u00e9, vous pouvez emp\u00eacher efficacement la lumi\u00e8re de p\u00e9n\u00e9trer sur la propri\u00e9t\u00e9 de vos voisins, tout en minimisant l'\u00e9blouissement et la lumi\u00e8re du ciel.<\/p><\/div><\/div><\/div><\/div>\n\n

Qu'est-ce qu'un luminaire enti\u00e8rement blind\u00e9 ?<\/h3><\/div><\/div>\n\n

L'expression \"enti\u00e8rement blind\u00e9\" d\u00e9signe les appareils d'\u00e9clairage qui ont \u00e9t\u00e9 con\u00e7us de mani\u00e8re \u00e0 ce que les rayons lumineux \u00e9mis, que ce soit directement par la lampe ou indirectement par l'appareil, soient dirig\u00e9s vers le bas en dessous d'un plan horizontal. Ce blindage est obtenu en pla\u00e7ant le point le plus bas du luminaire o\u00f9 la lumi\u00e8re est \u00e9mise en dessous de ce plan.<\/p><\/div><\/div><\/div><\/div><\/div><\/div>","protected":false},"excerpt":{"rendered":"

L'angle de coupure d'un luminaire est l'angle auquel la lumi\u00e8re \u00e9mise par un luminaire est dirig\u00e9e et contr\u00f4l\u00e9e.<\/p>","protected":false},"author":4,"featured_media":12860,"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\": \"cutoff fixture\", \"idxall\": 0, \"keywordtitlesimi\": 0.9490804672241211, \"keywordslugsimi\": 0.9490804672241211, \"paratitlesimi\": 0.7880494594573975, \"paraslugsimi\": 0.7880494594573975, \"slug\": \"what-is-cutoff-fixture\", \"title\": \"What is Cutoff Fixture\", \"id\": 13571}, {\"keyword\": \"light pollution\", \"idxall\": 0, \"keywordtitlesimi\": 0.9227848649024963, \"keywordslugsimi\": 0.9227848649024963, \"paratitlesimi\": 0.5619043111801147, \"paraslugsimi\": 0.5619043111801147, \"slug\": \"what-is-light-pollution\", \"title\": \"What is Light Pollution\", 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