{"id":164,"date":"2018-12-29T21:11:49","date_gmt":"2018-12-30T05:11:49","guid":{"rendered":"https:\/\/phoseon.com\/?page_id=164"},"modified":"2022-11-23T10:52:15","modified_gmt":"2022-11-23T18:52:15","slug":"led-uv-wavelength","status":"publish","type":"page","link":"https:\/\/phoseon.com\/fr\/industrial-curing\/technology\/led-uv-wavelength\/","title":{"rendered":"LED UV Longueur d'onde"},"content":{"rendered":"<p><\/p>\n\n\n\n<h2 class=\"has-text-align-center wp-block-heading\">Distribution spectrale des LED UV par rapport au mercure&nbsp;<\/h2>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/phoseon.com\/wp-content\/uploads\/2020\/12\/Wavelength_2014-Final-1024x453.jpg\" alt=\"\" class=\"wp-image-19235\" width=\"1024\" height=\"453\" srcset=\"https:\/\/phoseon.com\/wp-content\/uploads\/2020\/12\/Wavelength_2014-Final-1024x453.jpg 1024w, https:\/\/phoseon.com\/wp-content\/uploads\/2020\/12\/Wavelength_2014-Final-300x133.jpg 300w, https:\/\/phoseon.com\/wp-content\/uploads\/2020\/12\/Wavelength_2014-Final-768x340.jpg 768w, https:\/\/phoseon.com\/wp-content\/uploads\/2020\/12\/Wavelength_2014-Final-1536x679.jpg 1536w, https:\/\/phoseon.com\/wp-content\/uploads\/2020\/12\/Wavelength_2014-Final-16x7.jpg 16w, https:\/\/phoseon.com\/wp-content\/uploads\/2020\/12\/Wavelength_2014-Final-640x283.jpg 640w, https:\/\/phoseon.com\/wp-content\/uploads\/2020\/12\/Wavelength_2014-Final-1200x531.jpg 1200w, https:\/\/phoseon.com\/wp-content\/uploads\/2020\/12\/Wavelength_2014-Final.jpg 1617w\" sizes=\"(max-width: 639px) 98vw, (max-width: 1199px) 64vw, 770px\" \/><\/figure><\/div>\n\n\n<p>Le soleil est une source du spectre complet du rayonnement ultraviolet, qui est commun\u00e9ment subdivis\u00e9 en UV-A, UV-B et UV-C. La longueur d'onde du spectre d'une source lumineuse typique va de la lumi\u00e8re ultraviolette (UV-C : 200 \u00e0 280nm ; UV-B : 280 \u00e0 315nm ; UV-A : 315 \u00e0 400nm) \u00e0 la lumi\u00e8re visible (400 \u00e0 760nm) et \u00e0 la lumi\u00e8re infrarouge (760 \u00e0 3000nm). Les lampes UV LED ont une sortie spectrale \u00e9troite centr\u00e9e sur une longueur d'onde sp\u00e9cifique, \u00b110nm. La plupart des produits Phoseon utilisent des longueurs d'onde de 365nm, 385nm, 395nm ou 405nm. Cette distribution quasi-monochromatique (voir le tableau) n\u00e9cessite de nouvelles formulations chimiques pour garantir le durcissement correct des encres, des rev\u00eatements et des adh\u00e9sifs. <\/p>\n\n\n\n<p>La majorit\u00e9 du s\u00e9chage UV standard se fait dans une plage d'\u00e9mission \u00e9troite, le reste de la sortie spectrale g\u00e9n\u00e9rant des \u00e9missions UV-C et infrarouges inutiles et potentiellement dangereuses. Les lampes LED UV fournissent cette gamme d'\u00e9mission \u00e9troite.<\/p>\n\n\n\n<p><a href=\"https:\/\/phoseon.com\/fr\/industrial-curing\/products\/uv-curing-systems\/\">Sources de lumi\u00e8re de durcissement LED UV<\/a>&nbsp;convertissent efficacement 20 \u00e0 40% de l'\u00e9nergie \u00e9lectrique d'entr\u00e9e en lumi\u00e8re UV utilisable, sans exposition nocive aux UV-C ou aux infrarouges. Cette efficacit\u00e9 se traduit par des \u00e9conomies d'\u00e9nergie et de chaleur d'environ 80% par rapport aux lampes \u00e0 mercure.<\/p>\n\n\n\n<hr class=\"wp-block-separator is-style-wide\"\/>\n\n\n\n<h2 class=\"has-text-align-center wp-block-heading\">Pic d'irradiance et densit\u00e9 d'\u00e9nergie<\/h2>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"alignleft\"><img loading=\"lazy\" decoding=\"async\" width=\"374\" height=\"215\" src=\"https:\/\/phoseon.com\/wp-content\/uploads\/2019\/01\/Power-vs-irradiance.jpg\" alt=\"Puissance-vs-irradiance\" class=\"wp-image-2626\" srcset=\"https:\/\/phoseon.com\/wp-content\/uploads\/2019\/01\/Power-vs-irradiance.jpg 374w, https:\/\/phoseon.com\/wp-content\/uploads\/2019\/01\/Power-vs-irradiance-300x172.jpg 300w\" sizes=\"(max-width: 639px) 98vw, (max-width: 1199px) 64vw, 374px\" \/><\/figure><\/div>\n\n\n<p>Il existe deux param\u00e8tres cl\u00e9s d'une lampe \u00e0 LED qu'il convient de comprendre afin d'optimiser le durcissement et d'\u00e9tablir une fen\u00eatre de traitement. L'identification de cette fen\u00eatre de traitement permettra d'obtenir la finition la plus durable et la plus souhaitable, ainsi qu'une adh\u00e9rence et un durcissement de surface acceptables : l'irradiance maximale et la densit\u00e9 d'\u00e9nergie.<\/p>\n\n\n\n<p>L'irradiance de pointe, \u00e9galement appel\u00e9e intensit\u00e9, est la puissance radiante arrivant sur une surface par unit\u00e9 de surface. Avec le s\u00e9chage UV, la surface est la surface de s\u00e9chage du substrat ou de la pi\u00e8ce, et un centim\u00e8tre carr\u00e9 est l'unit\u00e9 de surface. L'irradiance est exprim\u00e9e en unit\u00e9s de watts ou de milliwatts par centim\u00e8tre carr\u00e9 (W\/cm\u00b2 ou mW\/cm\u00b2). L'irradiation de pointe joue un r\u00f4le d\u00e9terminant dans la p\u00e9n\u00e9tration et dans l'aide au durcissement de la surface. L'irradiance de pointe d\u00e9pend de la puissance de la source lumineuse, de l'utilisation de r\u00e9flecteurs ou d'optiques pour concentrer ou contenir les rayons dans une zone d'impact plus \u00e9troite, et de la distance entre la source et la surface \u00e0 traiter. L'irradiance des LED UV sur la surface de polym\u00e9risation diminue rapidement \u00e0 mesure que la distance entre la source et la surface de polym\u00e9risation augmente.<\/p>\n\n\n\n<p>La densit\u00e9 d'\u00e9nergie, \u00e9galement appel\u00e9e dose ou densit\u00e9 d'\u00e9nergie rayonnante, est l'\u00e9nergie qui arrive sur une surface par unit\u00e9 de surface pendant une p\u00e9riode de temps d\u00e9finie (temps de s\u00e9jour ou exposition). Le centim\u00e8tre carr\u00e9 est l'unit\u00e9 de surface et la densit\u00e9 d'\u00e9nergie rayonnante est exprim\u00e9e en joules ou millijoules par centim\u00e8tre carr\u00e9 (J\/cm\u00b2 ou mJ\/cm\u00b2). La densit\u00e9 d'\u00e9nergie est l'int\u00e9grale de l'\u00e9clairement \u00e9nerg\u00e9tique par rapport au temps. Une quantit\u00e9 suffisante de densit\u00e9 d'\u00e9nergie est n\u00e9cessaire pour un durcissement complet.<\/p>\n\n\n\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link has-background\" href=\"https:\/\/phoseon.com\/wp-content\/uploads\/2019\/03\/Phoseon-White-Paper_April-2018_Power-vs-Irradiance.pdf\" style=\"background-color:#633799\">T\u00e9l\u00e9charger le livre blanc sur les pics d'irradiance et la densit\u00e9 \u00e9nerg\u00e9tique.<\/a><\/div>\n\n\n\n<hr class=\"wp-block-separator is-style-wide\"\/>","protected":false},"excerpt":{"rendered":"<p>Distribution spectrale des LED UV par rapport au mercure Le soleil est une source de tout le spectre du rayonnement ultraviolet, qui est [...]<\/p>","protected":false},"author":2,"featured_media":0,"parent":160,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>LED UV Wavelength - 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