{"id":21001,"date":"2025-08-01T17:40:30","date_gmt":"2025-08-01T09:40:30","guid":{"rendered":"https:\/\/www.koonew.com\/?p=21001"},"modified":"2025-09-02T10:19:34","modified_gmt":"2025-09-02T02:19:34","slug":"quest-ce-quun-projecteur-a-courte-focale","status":"publish","type":"post","link":"https:\/\/www.koonew.com\/fr\/quest-ce-quun-projecteur-a-courte-focale\/","title":{"rendered":"Qu'est-ce qu'un projecteur \u00e0 courte focale ?"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"21001\" class=\"elementor elementor-21001\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-1f9c054 e-con-full e-flex e-con e-parent\" data-id=\"1f9c054\" data-element_type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-a6130cd e-con-full e-flex e-con e-child\" data-id=\"a6130cd\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-54d1d9d elementor-widget__width-initial elementor-widget elementor-widget-post-info\" data-id=\"54d1d9d\" data-element_type=\"widget\" data-widget_type=\"post-info.default\">\n\t\t\t\t\t\t\t<ul class=\"elementor-icon-list-items elementor-post-info\">\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item elementor-repeater-item-d2e0471\" itemprop=\"about\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text elementor-post-info__item elementor-post-info__item--type-terms\">\n\t\t\t\t\t\t\t<span class=\"elementor-post-info__item-prefix\">#<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-post-info__terms-list\">\n\t\t\t\t<a href=\"https:\/\/www.koonew.com\/fr\/categorie\/blog\/produits-apprentissage\/\" class=\"elementor-post-info__terms-list-item\">Produits et apprentissage<\/a>\t\t\t\t<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t<\/ul>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e9ceb03 elementor-widget elementor-widget-heading\" data-id=\"e9ceb03\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">Qu'est-ce qu'un projecteur \u00e0 courte focale ?<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4b22e7e elementor-widget elementor-widget-post-info\" data-id=\"4b22e7e\" data-element_type=\"widget\" data-widget_type=\"post-info.default\">\n\t\t\t\t\t\t\t<ul class=\"elementor-icon-list-items elementor-post-info\">\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item elementor-repeater-item-d2e0471\" itemprop=\"datePublished\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text elementor-post-info__item elementor-post-info__item--type-date\">\n\t\t\t\t\t\t\t\t\t\t<time>08\/01\/2025<\/time>\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t<\/ul>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-2b97f91 e-con-full e-flex e-con e-child\" data-id=\"2b97f91\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-f58f552 elementor-share-buttons--view-icon elementor-share-buttons--skin-framed elementor-share-buttons--shape-circle elementor-grid-0 elementor-share-buttons--color-official elementor-widget elementor-widget-share-buttons\" data-id=\"f58f552\" data-element_type=\"widget\" data-widget_type=\"share-buttons.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-grid\" role=\"list\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-grid-item\" role=\"listitem\">\n\t\t\t\t\t\t<div class=\"elementor-share-btn elementor-share-btn_facebook\" role=\"button\" tabindex=\"0\" aria-label=\"Partager sur facebook\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-share-btn__icon\">\n\t\t\t\t\t\t\t\t<svg class=\"e-font-icon-svg e-fab-facebook\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M504 256C504 119 393 8 256 8S8 119 8 256c0 123.78 90.69 226.38 209.25 245V327.69h-63V256h63v-54.64c0-62.15 37-96.48 93.67-96.48 27.14 0 55.52 4.84 55.52 4.84v61h-31.28c-30.8 0-40.41 19.12-40.41 38.73V256h68.78l-11 71.69h-57.78V501C413.31 482.38 504 379.78 504 256z\"><\/path><\/svg>\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-grid-item\" role=\"listitem\">\n\t\t\t\t\t\t<div class=\"elementor-share-btn elementor-share-btn_x-twitter\" role=\"button\" tabindex=\"0\" aria-label=\"Partager sur x-twitter\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-share-btn__icon\">\n\t\t\t\t\t\t\t\t<svg class=\"e-font-icon-svg e-fab-x-twitter\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M389.2 48h70.6L305.6 224.2 487 464H345L233.7 318.6 106.5 464H35.8L200.7 275.5 26.8 48H172.4L272.9 180.9 389.2 48zM364.4 421.8h39.1L151.1 88h-42L364.4 421.8z\"><\/path><\/svg>\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-grid-item\" role=\"listitem\">\n\t\t\t\t\t\t<div class=\"elementor-share-btn elementor-share-btn_pinterest\" role=\"button\" tabindex=\"0\" aria-label=\"Partager sur pinterest\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-share-btn__icon\">\n\t\t\t\t\t\t\t\t<svg class=\"e-font-icon-svg e-fab-pinterest\" viewbox=\"0 0 496 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M496 256c0 137-111 248-248 248-25.6 0-50.2-3.9-73.4-11.1 10.1-16.5 25.2-43.5 30.8-65 3-11.6 15.4-59 15.4-59 8.1 15.4 31.7 28.5 56.8 28.5 74.8 0 128.7-68.8 128.7-154.3 0-81.9-66.9-143.2-152.9-143.2-107 0-163.9 71.8-163.9 150.1 0 36.4 19.4 81.7 50.3 96.1 4.7 2.2 7.2 1.2 8.3-3.3.8-3.4 5-20.3 6.9-28.1.6-2.5.3-4.7-1.7-7.1-10.1-12.5-18.3-35.3-18.3-56.6 0-54.7 41.4-107.6 112-107.6 60.9 0 103.6 41.5 103.6 100.9 0 67.1-33.9 113.6-78 113.6-24.3 0-42.6-20.1-36.7-44.8 7-29.5 20.5-61.3 20.5-82.6 0-19-10.2-34.9-31.4-34.9-24.9 0-44.9 25.7-44.9 60.2 0 22 7.4 36.8 7.4 36.8s-24.5 103.8-29 123.2c-5 21.4-3 51.6-.9 71.2C65.4 450.9 0 361.1 0 256 0 119 111 8 248 8s248 111 248 248z\"><\/path><\/svg>\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-ac672de e-flex e-con-boxed e-con e-parent\" data-id=\"ac672de\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-ebcb264 e-con-full e-flex e-con e-child\" data-id=\"ebcb264\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t<div class=\"elementor-element elementor-element-9a0a45b e-con-full e-flex e-con e-child\" data-id=\"9a0a45b\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-ad4fadb elementor-hidden-desktop elementor-hidden-tablet elementor-hidden-mobile elementor-widget elementor-widget-image\" data-id=\"ad4fadb\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"430\" src=\"https:\/\/www.koonew.com\/wp-content\/uploads\/2022\/11\/banner1-home-2-1024x430.webp\" class=\"attachment-large size-large wp-image-16960\" alt=\"\u00c9cran de projection intelligent d&#039;un fabricant de projecteurs\" srcset=\"https:\/\/www.koonew.com\/wp-content\/uploads\/2022\/11\/banner1-home-2-1024x430.webp 1024w, https:\/\/www.koonew.com\/wp-content\/uploads\/2022\/11\/banner1-home-2-300x126.webp 300w, https:\/\/www.koonew.com\/wp-content\/uploads\/2022\/11\/banner1-home-2-768x322.webp 768w, https:\/\/www.koonew.com\/wp-content\/uploads\/2022\/11\/banner1-home-2-1536x645.webp 1536w, https:\/\/www.koonew.com\/wp-content\/uploads\/2022\/11\/banner1-home-2-2048x860.webp 2048w, https:\/\/www.koonew.com\/wp-content\/uploads\/2022\/11\/banner1-home-2-18x8.webp 18w, https:\/\/www.koonew.com\/wp-content\/uploads\/2022\/11\/banner1-home-2-1064x447.webp 1064w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e9b93fb elementor-widget__width-inherit elementor-widget elementor-widget-text-editor\" data-id=\"e9b93fb\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Un projecteur \u00e0 courte focale est un dispositif de projection dot\u00e9 d'un rapport de focale extr\u00eamement faible (g\u00e9n\u00e9ralement de 0,27 \u00e0 0,69), capable de projeter une image de 70 \u00e0 120 pouces \u00e0 une distance comprise entre quelques dizaines de centim\u00e8tres et 1,5 m\u00e8tre, ce qui am\u00e9liore consid\u00e9rablement l'utilisation de l'espace. Son objectif principal est de r\u00e9soudre les probl\u00e8mes d'obstruction de la lumi\u00e8re et de limitation de l'espace d'installation des projecteurs traditionnels en r\u00e9duisant la distance de projection, ce qui le rend adapt\u00e9 \u00e0 l'enseignement, aux entreprises, \u00e0 la maison et \u00e0 d'autres sc\u00e9narios.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-79637c7 elementor-widget elementor-widget-heading\" data-id=\"79637c7\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Technologie de base du projecteur \u00e0 courte focale<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3832095 elementor-widget__width-inherit elementor-widget elementor-widget-text-editor\" data-id=\"3832095\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>La technologie de la courte port\u00e9e est principalement obtenue gr\u00e2ce \u00e0 deux solutions optiques :<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f48af96 elementor-widget elementor-widget-heading\" data-id=\"f48af96\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Objectif Fisheye (type de r\u00e9fraction) :<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1787b1b elementor-widget__width-inherit elementor-widget elementor-widget-text-editor\" data-id=\"1787b1b\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Principe : utilisation d'un objectif ultra grand angle (similaire \u00e0 un objectif fisheye d'appareil photo) avec des groupes de lentilles complexes pour r\u00e9fracter la lumi\u00e8re directement, ce qui raccourcit le trajet optique.<\/p><p>Caract\u00e9ristiques : Structure relativement simple et co\u00fbt r\u00e9duit, mais tendance \u00e0 la distorsion lin\u00e9aire (d\u00e9formation des bords de l'image), n\u00e9cessitant une correction algorithmique.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-04f753c elementor-widget elementor-widget-heading\" data-id=\"04f753c\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Syst\u00e8me optique r\u00e9fl\u00e9chissant :<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-69a33cf elementor-widget__width-inherit elementor-widget elementor-widget-text-editor\" data-id=\"69a33cf\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Principe : La lumi\u00e8re est d'abord projet\u00e9e sur un r\u00e9flecteur, puis r\u00e9fl\u00e9chie sur l'\u00e9cran, en comprimant le trajet optique \u00e0 l'aide de composants de pr\u00e9cision tels que des miroirs asph\u00e9riques ou des miroirs de forme libre.<\/p><p>Caract\u00e9ristiques : Distance de projection plus courte (par exemple, 47 cm pour 60 pouces) mais exige une grande pr\u00e9cision de fabrication ; des erreurs mineures dans le miroir entra\u00eenent une luminosit\u00e9 in\u00e9gale ou des d\u00e9formations.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0727e66 elementor-widget elementor-widget-heading\" data-id=\"0727e66\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Perc\u00e9es technologiques auxiliaires :<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-de03f98 elementor-widget__width-inherit elementor-widget elementor-widget-text-editor\" data-id=\"de03f98\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Dispositif num\u00e9rique \u00e0 micromiroirs (DMD) : au c\u0153ur de la technologie DLP, il contr\u00f4le avec pr\u00e9cision la r\u00e9flexion de la lumi\u00e8re par l'interm\u00e9diaire de matrices de micromiroirs afin d'am\u00e9liorer la qualit\u00e9 de l'image et la vitesse de r\u00e9ponse.<\/p><p>Algorithmes de correction de la distorsion : Correction en temps r\u00e9el de la distorsion g\u00e9om\u00e9trique caus\u00e9e par les objectifs fisheye, garantissant une image plane.<\/p><p>Mat\u00e9riaux optiques de haute pr\u00e9cision : Les lentilles asph\u00e9riques et les mat\u00e9riaux \u00e0 faible dispersion r\u00e9duisent les aberrations et am\u00e9liorent la pr\u00e9cision des couleurs.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f7f9613 elementor-widget elementor-widget-heading\" data-id=\"f7f9613\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Qu'est-ce qu'un projecteur UST (ultra short throw) ?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-431f432 elementor-widget__width-inherit elementor-widget elementor-widget-text-editor\" data-id=\"431f432\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Un projecteur \u00e0 ultra-courte focale est un appareil qui permet une projection \u00e0 tr\u00e8s courte distance gr\u00e2ce \u00e0 des conceptions optiques sp\u00e9cialis\u00e9es. Son param\u00e8tre cl\u00e9 est le rapport de projection (\u22640,4), ce qui signifie qu'il peut projeter une image de plus de 80 pouces \u00e0 une distance de quelques dizaines de centim\u00e8tres seulement. Par exemple, une image de 100 pouces ne n\u00e9cessite g\u00e9n\u00e9ralement qu'une distance de 25 \u00e0 50 cm.<br \/>Rapport de projection = Distance de projection \/ Largeur de l'image<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5a167e7 elementor-widget elementor-widget-heading\" data-id=\"5a167e7\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Classification des rapports de projection<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b5ad095 elementor-widget__width-inherit elementor-widget elementor-widget-text-editor\" data-id=\"b5ad095\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Projecteur \u00e0 longue port\u00e9e : Rapport de projection 1,0-1,9 \u2192 Projette 100 pouces \u00e0 partir de 2,5-3 m\u00e8tres<\/p><p>Projecteur \u00e0 courte focale : Rapport de projection 0,4-1,0 \u2192 Projette 100 pouces de 1 \u00e0 2 m\u00e8tres<\/p><p>Projecteur \u00e0 focale ultra-courte (UST) : Rapport de projection \u2264 0,4 \u2192 Projette 100 pouces \u00e0 partir de &lt;0,5 m\u00e8tres<\/p><p>Les projecteurs UST utilisent g\u00e9n\u00e9ralement un syst\u00e8me optique r\u00e9fl\u00e9chissant, dans lequel la lumi\u00e8re est redirig\u00e9e par des miroirs asph\u00e9riques ou de forme libre pour replier le chemin optique, r\u00e9duisant ainsi consid\u00e9rablement la distance physique.<\/p><p>D\u00e9couvrez le projecteur laser 4K UST haute luminosit\u00e9 de Koonew : <a href=\"https:\/\/www.koonew.com\/fr\/produit\/projecteur-de-bureau-projecteur-laser-a-focale-ultra-courte\/\">HD50V<\/a><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a74a37e elementor-widget elementor-widget-heading\" data-id=\"a74a37e\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Projecteurs \u00e0 courte focale ou \u00e0 longue focale : Avantages et inconv\u00e9nients<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f590063 elementor-widget elementor-widget-heading\" data-id=\"f590063\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Avantages des projecteurs \u00e0 courte focale<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6740824 elementor-widget__width-inherit elementor-widget elementor-widget-text-editor\" data-id=\"6740824\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Adaptation \u00e0 l'espace : Projette des \u00e9crans de 100 pouces \u00e0 des distances proches du mur (par exemple, 0,34 m pour 100 pouces), ce qui est id\u00e9al pour les petits espaces et les salles de r\u00e9union.<\/p><p>\u00c9vite les interf\u00e9rences : La proximit\u00e9 de l'\u00e9cran emp\u00eache les pr\u00e9sentateurs de bloquer la lumi\u00e8re ou de projeter des ombres, prot\u00e9geant ainsi les yeux d'un \u00e9blouissement direct.<\/p><p>Installation facile : Aucun montage au plafond n'est n\u00e9cessaire ; un placement sur le bureau suffit, ce qui permet une mobilit\u00e9 flexible.<\/p><p>Synchronisation audiovisuelle : Le son et l'image sont \u00e9mis dans la m\u00eame direction, ce qui renforce l'immersion (les projecteurs \u00e0 longue port\u00e9e s\u00e9parent l'audio et le visuel).<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a677346 elementor-widget elementor-widget-heading\" data-id=\"a677346\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Inconv\u00e9nients des projecteurs \u00e0 courte focale<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4426810 elementor-widget__width-inherit elementor-widget elementor-widget-text-editor\" data-id=\"4426810\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Luminosit\u00e9 plus faible : La compression du trajet optique entra\u00eene une perte de luminosit\u00e9 ; la plupart des mod\u00e8les ont une luminosit\u00e9 inf\u00e9rieure \u00e0 3000 lumens, ce qui les rend moins performants dans les environnements lumineux que les projecteurs \u00e0 longue port\u00e9e.<\/p><p>Distorsion des bords : Les objectifs Fisheye reposent sur une correction algorithmique ; les mod\u00e8les bas de gamme peuvent pr\u00e9senter des images irr\u00e9guli\u00e8res.<\/p><p>Co\u00fbt et encombrement : Les optiques complexes augmentent le prix (20-30% plus \u00e9lev\u00e9 qu'une longue focale \u00e9quivalente) et entra\u00eenent des corps plus encombrants.<\/p><p>Taille maximale : G\u00e9n\u00e9ralement, la taille maximale est de 120 pouces ; la longueur de la trajectoire d\u00e9passe facilement 150 pouces.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-733f7a7 elementor-widget elementor-widget-heading\" data-id=\"733f7a7\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Avantages des projecteurs \u00e0 longue focale<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9566090 elementor-widget__width-inherit elementor-widget elementor-widget-text-editor\" data-id=\"9566090\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Priorit\u00e9 \u00e0 la qualit\u00e9 de l'image : luminosit\u00e9 plus \u00e9lev\u00e9e (5000+ lumens), couleurs plus pr\u00e9cises, adapt\u00e9e aux sc\u00e9narios exigeants (par exemple, home cin\u00e9ma).<\/p><p>Flexibilit\u00e9 de la projection : Permet de projeter des \u00e9crans de grande taille sur de longues distances (par exemple, 10 m pour 150 pouces), ce qui est id\u00e9al pour les grandes salles.<\/p><p>Avantage en termes de prix : Une technologie mature offre des prix plus bas pour une luminosit\u00e9 similaire.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-11b407e elementor-widget elementor-widget-heading\" data-id=\"11b407e\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Inconv\u00e9nients des projecteurs \u00e0 longue focale<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a7a830c elementor-widget__width-inherit elementor-widget elementor-widget-text-editor\" data-id=\"a7a830c\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Espace requis plus important : Les projecteurs \u00e0 longue port\u00e9e n\u00e9cessitent g\u00e9n\u00e9ralement une plus grande distance pour projeter de grandes images, ce qui peut s'av\u00e9rer contraignant dans des espaces plus restreints. Par exemple, la projection d'une image de 100 pouces n\u00e9cessite g\u00e9n\u00e9ralement une distance de 2,5 \u00e0 3 m\u00e8tres.<br \/>Une profondeur suffisante doit \u00eatre r\u00e9serv\u00e9e, ce qui r\u00e9duit l'utilisation de l'espace.<\/p><p>Installation fixe : La plupart des projecteurs \u00e0 longue port\u00e9e, en particulier les mod\u00e8les commerciaux et techniques, n\u00e9cessitent une installation fixe au plafond et impliquent des processus d'installation et d'\u00e9talonnage complexes.<\/p><p>Obstruction et interf\u00e9rence de la lumi\u00e8re : En raison de la longueur du trajet de la lumi\u00e8re, les personnes qui marchent ou les objets qui passent peuvent bloquer le faisceau et projeter des ombres sur l'\u00e9cran.<br \/>En outre, les projecteurs sont g\u00e9n\u00e9ralement plac\u00e9s derri\u00e8re le public, et la forte lumi\u00e8re peut directement \u00e9clairer les yeux des spectateurs.<\/p><p>D\u00e9synchronisation de l'audio et de la vid\u00e9o : Sans haut-parleurs externes, la distance entre le projecteur et la zone de visualisation peut entra\u00eener une d\u00e9synchronisation de l'audio et de la vid\u00e9o, ce qui r\u00e9duit l'exp\u00e9rience immersive.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f1b0ec2 elementor-widget elementor-widget-heading\" data-id=\"f1b0ec2\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Applications des projecteurs \u00e0 courte focale<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3916a31 elementor-widget elementor-widget-heading\" data-id=\"3916a31\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Secteur de l'\u00e9ducation<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-65fadb5 elementor-widget__width-inherit elementor-widget elementor-widget-text-editor\" data-id=\"65fadb5\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Le probl\u00e8me est r\u00e9solu : Les enseignants ne bloquent plus la lumi\u00e8re et ne souffrent plus d'\u00e9blouissement ; les projecteurs sont mont\u00e9s \u00e0 proximit\u00e9 des tableaux blancs (par exemple, 1 m pour 80 pouces avec un rapport de projection de 0,6).<\/p><p>Enseignement interactif : s'int\u00e8gre aux tableaux intelligents pour les annotations tactiles.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1fc2228 elementor-widget elementor-widget-heading\" data-id=\"1fc2228\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">R\u00e9unions d'affaires<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c07e585 elementor-widget__width-inherit elementor-widget elementor-widget-text-editor\" data-id=\"c07e585\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Petites salles de conf\u00e9rence : 1 m pour 100 pouces, pour r\u00e9soudre les probl\u00e8mes d'espace dans les PME.\u00a0<\/p><p>D\u00e9monstrations efficaces : Aucune installation n'est n\u00e9cessaire ; prise en charge de la diffusion sans fil pour des r\u00e9unions plus rapides.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6157fd3 elementor-widget elementor-widget-heading\" data-id=\"6157fd3\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\"> Divertissement \u00e0 domicile<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6d57965 elementor-widget__width-inherit elementor-widget elementor-widget-text-editor\" data-id=\"6d57965\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Salles de cin\u00e9ma compactes : Des \u00e9crans de 100 pouces projet\u00e9s au mur remplacent les t\u00e9l\u00e9viseurs.<\/p><p>Exp\u00e9rience de jeu : Les joueurs proches des \u00e9crans \u00e9vitent les interf\u00e9rences d'ombre, ce qui est id\u00e9al pour les jeux \u00e0 d\u00e9tection de mouvement.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8a50901 elementor-widget elementor-widget-heading\" data-id=\"8a50901\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Pr\u00e9sentoirs commerciaux<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-96d735d elementor-widget__width-inherit elementor-widget elementor-widget-text-editor\" data-id=\"96d735d\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Publicit\u00e9 en vitrine : Les projections \u00e0 courte distance attirent l'attention et stimulent la fr\u00e9quentation des magasins.<br \/>Interaction avec les expositions : Combinaison avec la RA pour des affichages interactifs sur les murs.<br \/>Projecteur \u00e0 courte focale pour l'\u00e9ducation et l'entreprise de Koonew : <a href=\"https:\/\/www.koonew.com\/fr\/produit\/projecteur-de-salle-de-classe-projecteur-dlp-laser-a-courte-portee\/\">WX50X<\/a><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-6b2a5e3 e-con-full elementor-hidden-mobile e-flex e-con e-child\" data-id=\"6b2a5e3\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-790d23e e-con-full elementor-hidden-mobile e-flex e-con e-child\" data-id=\"790d23e\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t<div class=\"elementor-element elementor-element-793f8cd e-con-full e-flex e-con e-child\" data-id=\"793f8cd\" data-element_type=\"container\" data-settings=\"{&quot;sticky&quot;:&quot;top&quot;,&quot;sticky_on&quot;:[&quot;desktop&quot;,&quot;tablet&quot;],&quot;sticky_offset&quot;:60,&quot;sticky_parent&quot;:&quot;yes&quot;,&quot;sticky_effects_offset&quot;:0,&quot;sticky_anchor_link_offset&quot;:0}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b80f5f7 elementor-widget elementor-widget-table-of-contents\" data-id=\"b80f5f7\" data-element_type=\"widget\" data-settings=\"{&quot;headings_by_tags&quot;:[&quot;h2&quot;,&quot;h3&quot;],&quot;exclude_headings_by_selector&quot;:[],&quot;marker_view&quot;:&quot;bullets&quot;,&quot;icon&quot;:{&quot;value&quot;:&quot;&quot;,&quot;library&quot;:&quot;&quot;},&quot;no_headings_message&quot;:&quot;No headings were found on this page.&quot;,&quot;min_height&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:0,&quot;sizes&quot;:[]},&quot;hierarchical_view&quot;:&quot;yes&quot;,&quot;min_height_tablet&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;min_height_mobile&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]}}\" data-widget_type=\"table-of-contents.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-toc__header\">\n\t\t\t<h2 class=\"elementor-toc__header-title\">\n\t\t\t\tNavigation rapide\t\t\t<\/h2>\n\t\t\t\t\t<\/div>\n\t\t<div id=\"elementor-toc__b80f5f7\" class=\"elementor-toc__body\">\n\t\t\t<div class=\"elementor-toc__spinner-container\">\n\t\t\t\t<svg class=\"elementor-toc__spinner eicon-animation-spin e-font-icon-svg e-eicon-loading\" aria-hidden=\"true\" viewbox=\"0 0 1000 1000\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M500 975V858C696 858 858 696 858 500S696 142 500 142 142 304 142 500H25C25 237 238 25 500 25S975 237 975 500 763 975 500 975Z\"><\/path><\/svg>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-99aad4b e-con-full e-flex e-con e-child\" data-id=\"99aad4b\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-ba729b3 elementor-widget elementor-widget-image\" data-id=\"ba729b3\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/www.koonew.com\/fr\/produit\/projecteur-de-bureau-projecteur-laser-a-focale-ultra-courte\/\">\n\t\t\t\t\t\t\t<img decoding=\"async\" width=\"1500\" height=\"1500\" src=\"https:\/\/www.koonew.com\/wp-content\/uploads\/2025\/07\/HD50V-1.webp\" class=\"attachment-full size-full wp-image-20803\" alt=\"\" srcset=\"https:\/\/www.koonew.com\/wp-content\/uploads\/2025\/07\/HD50V-1.webp 1500w, https:\/\/www.koonew.com\/wp-content\/uploads\/2025\/07\/HD50V-1-300x300.webp 300w, https:\/\/www.koonew.com\/wp-content\/uploads\/2025\/07\/HD50V-1-1024x1024.webp 1024w, https:\/\/www.koonew.com\/wp-content\/uploads\/2025\/07\/HD50V-1-150x150.webp 150w, https:\/\/www.koonew.com\/wp-content\/uploads\/2025\/07\/HD50V-1-768x768.webp 768w, https:\/\/www.koonew.com\/wp-content\/uploads\/2025\/07\/HD50V-1-12x12.webp 12w, https:\/\/www.koonew.com\/wp-content\/uploads\/2025\/07\/HD50V-1-1064x1064.webp 1064w, https:\/\/www.koonew.com\/wp-content\/uploads\/2025\/07\/HD50V-1-200x200.webp 200w\" sizes=\"(max-width: 1500px) 100vw, 1500px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e62e3b8 elementor-widget elementor-widget-heading\" data-id=\"e62e3b8\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\"><a href=\"https:\/\/www.koonew.com\/fr\/produit\/projecteur-de-bureau-projecteur-laser-a-focale-ultra-courte\/\">Koonew 4K DLP Laser Projector I HD50V<\/a><\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4a847cc elementor-widget elementor-widget-heading\" data-id=\"4a847cc\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">Soyez le premier \u00e0 savoir<\/p>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c92a421 elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"c92a421\" data-element_type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-630f3fc elementor-button-align-stretch elementor-widget 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id=\"form-field-email\" class=\"elementor-field elementor-size-lg  elementor-field-textual\" placeholder=\"Saisissez votre adresse \u00e9lectronique\" required=\"required\">\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-group elementor-column elementor-field-type-submit elementor-col-100 e-form__buttons\">\n\t\t\t\t\t<button class=\"elementor-button elementor-size-lg\" type=\"submit\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">S'abonner<\/span>\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/button>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<input type=\"hidden\" name=\"trp-form-language\" value=\"fr\"\/><\/form>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>Un projecteur \u00e0 courte focale projette des images de grande taille sur de tr\u00e8s courtes distances, ce qui est id\u00e9al pour les petits espaces dans les \u00e9tablissements d'enseignement, les entreprises ou les particuliers.<\/p>","protected":false},"author":1,"featured_media":21267,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-21001","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-products-learning"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>What is a short throw projector<\/title>\n<meta name=\"description\" content=\"A short throw projector projects large images from very short distances, ideal for small spaces in education, business, or home setups.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link 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