{"id":9562,"date":"2026-03-04T15:09:01","date_gmt":"2026-03-04T14:09:01","guid":{"rendered":"https:\/\/rodervision.com\/products\/led-ring-illuminators\/"},"modified":"2026-05-25T17:33:02","modified_gmt":"2026-05-25T15:33:02","slug":"led-ring-illuminators","status":"publish","type":"page","link":"https:\/\/rodervision.com\/fr\/products\/led-ring-illuminators\/","title":{"rendered":"Illuminateurs LED annulaires"},"content":{"rendered":"\n

Ring light illuminators are the most widely used front illumination solution in industrial machine vision. Mounted coaxially around the camera lens, they deliver uniform, shadow-free light directly onto the inspected surface \u2014 eliminating the directional artifacts that single-source illuminators introduce at the edges of the field of view.<\/p>\n\n

RODER Vision’s DC series covers the full spectrum of ring light requirements: from compact low-angle configurations for surface defect detection and scratch visibility, to flat high-density matrix rings for space-constrained integration, to large-format models for wide-area circular inspection fields. The RDL1 series adds variable illumination angle for applications that require optical flexibility across multiple product variants.<\/p>\n\n

Toutes les s\u00e9ries sont disponibles en plusieurs longueurs d’onde \u2014 blanc, rouge, bleu, vert et infrarouge \u2014 avec drivers int\u00e9gr\u00e9s 24 Vdc, gestion thermique HTTM et connecteurs M8 r\u00e9sistants aux vibrations pour une int\u00e9gration OEM directe.<\/p>\n\n

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\u00c9clairage annulaire \u00e0 angle moyen. Contraste \u00e9lev\u00e9 pour la d\u00e9tection des bords et l’analyse des d\u00e9fauts de surface<\/strong><\/a><\/p>\n\n\n\n

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Profil plat, flux lumineux \u00e9lev\u00e9. Luminosit\u00e9 maximale l\u00e0 o\u00f9 l’espace d’installation est limit\u00e9.<\/strong><\/a><\/p>\n\n\n\n

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Lentilles de focalisation int\u00e9gr\u00e9es. \u00c9clairage concentr\u00e9 pour des inspections pr\u00e9cises et reproductibles<\/a><\/strong><\/p>\n<\/div>\n<\/div>\n\n\n\n

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Anneau plat \u00e0 flux \u00e9lev\u00e9. T\u00e2ches d’inspection exigeantes avec un \u00e9clairage homog\u00e8ne et sans ombre.<\/strong><\/a><\/p>\n\n\n\n

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Anneau matriciel, profil plat. LED haute densit\u00e9 au format compact, montable sur cam\u00e9ra.<\/a><\/strong><\/p>\n\n\n\n

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\u00c9clairage annulaire grand format. Couverture \u00e9tendue avec un \u00e9clairage homog\u00e8ne \u00e0 haute densit\u00e9.<\/strong><\/a><\/p>\n<\/div>\n<\/div>\n\n\n\n

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Anneau lumineux nouvelle g\u00e9n\u00e9ration. Matrice LED haute puissance avec gestion thermique avanc\u00e9e.<\/strong><\/p>\n\n\n\n

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Nouvelle s\u00e9rie d’anneaux. Con\u00e7ue pour la prochaine g\u00e9n\u00e9ration de syst\u00e8mes d’inspection automatis\u00e9s.<\/strong><\/p>\n\n\n\n

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Angle d’\u00e9clairage r\u00e9glable. Un seul anneau lumineux, configurable pour plusieurs g\u00e9om\u00e9tries d’inspection.<\/strong><\/a><\/p>\n\n\n\n

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D\u00f4me plat compact. \u00c9clairage homog\u00e8ne et sans ombre pour les surfaces brillantes et incurv\u00e9es.<\/strong><\/a><\/p>\n\n\n\n

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\u00c9clairage diffus avanc\u00e9. \u00c9limine \u00e9blouissements et reflets sur les pi\u00e8ces polies ou r\u00e9fl\u00e9chissantes.<\/strong><\/a><\/p>\n\n\n\n

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D\u00f4me plat \u00e0 profil bas. Acquisition sans reflets sur des surfaces complexes et tr\u00e8s r\u00e9fl\u00e9chissantes.<\/strong><\/a><\/p>\n<\/div>\n<\/div>\n\n\n\n

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\u00c9clairages LED annulaires pour la vision industrielle : guide technique et crit\u00e8res de s\u00e9lection<\/h2>\n\n\n\n

Ring light illuminators occupy a central role in automated optical inspection. Their concentric geometry around the camera optical axis produces uniform, diffuse-to-direct front illumination that is inherently free from the angular shadows and contrast gradients generated by off-axis light sources. For any inspection task where the camera is positioned above the part and the field of view is roughly circular or square, a ring light is the natural starting point for illumination design.<\/p>\n\n\n\n

Understanding the technical parameters of ring illumination \u2014 angle of incidence, flux density, spatial uniformity, and working distance \u2014 is essential to selecting the correct series and avoiding the most common integration errors.<\/p>\n\n\n\n

Angle d’\u00e9clairage : la variable principale de s\u00e9lection<\/h2>\n\n\n\n

L’angle sous lequel la lumi\u00e8re frappe la surface inspect\u00e9e d\u00e9termine quelles caract\u00e9ristiques de surface deviennent visibles et lesquelles sont supprim\u00e9es. C’est la variable la plus critique dans le choix d’un anneau lumineux.<\/p>\n\n\n\n

High-angle illumination<\/strong> (light striking the surface at a steep angle, close to perpendicular) produces bright, even illumination across the surface. It is the standard choice for label and print inspection, OCR and barcode reading, colour verification, and any application where overall surface visibility and uniform brightness matter more than texture accentuation.<\/p>\n\n\n\n

Low-angle illumination<\/strong> (light striking the surface at a shallow angle, nearly parallel to the surface plane) generates strong raking shadows across surface irregularities. Scratches, cracks, embossed text, mould seams, and micro-defects on otherwise flat surfaces become dramatically more visible under low-angle ring illumination. The DC2 series is specifically engineered for this geometry.<\/p>\n\n\n\n

Variable-angle illumination<\/strong> \u2014 as provided by the RDL1 series \u2014 allows the engineer to adjust the illumination angle mechanically during setup or across product changeovers. This is particularly valuable in flexible manufacturing cells where multiple part types share a single vision station.<\/p>\n\n\n\n

Profil plat vs. profil standard : contraintes d’int\u00e9gration<\/h2>\n\n\n\n

The mechanical format of the ring light directly affects integration feasibility. Standard-profile ring illuminators offer greater working distance flexibility but require more axial space between camera and part. Flat-profile matrix ring illuminators \u2014 the DC3, DC4, DC5, DC6, and DC7 series \u2014 reduce the axial footprint significantly, enabling close-proximity mounting in machines where vertical clearance is limited.<\/p>\n\n\n\n

For robot-mounted camera systems and end-of-arm inspection tools, flat-profile rings are almost always the correct choice. Their reduced mass and minimal protrusion beyond the camera body simplify both mechanical design and collision avoidance programming.<\/p>\n\n\n\n

Densit\u00e9 de flux et applications \u00e0 grande vitesse<\/h2>\n\n\n\n

High-speed production lines impose stringent demands on illuminator brightness. Industrial cameras operating at short exposure times \u2014 typically below 500 microseconds for fast conveyor applications \u2014 require proportionally higher light flux to maintain adequate image exposure. Standard continuous-operation ring lights may be insufficient at these speeds.<\/p>\n\n\n\n

The DC4 and DC5 series incorporate integrated focusing lenses and high-flux LED matrices that deliver concentrated, high-intensity output suitable for demanding continuous-operation applications. For applications requiring strobe or overdrive operation, an external pulse controller can drive compatible RODER ring illuminators at peak currents well above the continuous rating, generating burst luminous flux several times higher than the CW specification \u2014 with no thermal risk, provided duty cycle limits are respected.<\/p>\n\n\n\n

Choix de la longueur d’onde pour l’\u00e9clairage annulaire<\/h2>\n\n\n\n

Le choix de la longueur d’onde LED dans les illuminateurs annulaires suit les m\u00eames principes que pour tout \u00e9clairage de vision industrielle : l’objectif est le contraste entre la caract\u00e9ristique d’int\u00e9r\u00eat et le mat\u00e9riau environnant.<\/p>\n\n\n\n

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  • Rouge (620\u2013640 nm)<\/strong> renforce le contraste sur mat\u00e9riaux organiques, caoutchouc sombre et texte imprim\u00e9 sur substrats clairs. C’est la longueur d’onde la plus couramment sp\u00e9cifi\u00e9e pour l’\u00e9clairage annulaire g\u00e9n\u00e9raliste.<\/li>\n\n\n\n
  • Bleu (450\u2013470 nm)<\/strong> augmente la r\u00e9solution sur les caract\u00e9ristiques de surface fines et am\u00e9liore le contraste sur les mat\u00e9riaux jaunes, verts et dor\u00e9s. Largement utilis\u00e9 en inspection PCB et \u00e9lectronique.<\/li>\n\n\n\n
  • Vert (520\u2013530 nm)<\/strong> offre un contraste \u00e9quilibr\u00e9 sur une large gamme de mat\u00e9riaux industriels et est efficace sur les surfaces m\u00e9talliques.<\/li>\n\n\n\n
  • Infrarouge (850 nm et au-del\u00e0)<\/strong> p\u00e9n\u00e8tre certains rev\u00eatements, encres et mat\u00e9riaux d’emballage, r\u00e9v\u00e9lant les caract\u00e9ristiques sous-jacentes invisibles sous \u00e9clairage visible.<\/li>\n\n\n\n
  • Blanc<\/strong> convient aux t\u00e2ches de mesure de couleur et aux applications o\u00f9 plusieurs types de caract\u00e9ristiques n\u00e9cessitent une analyse simultan\u00e9e.<\/li>\n<\/ul>\n\n\n\n

    La s\u00e9rie RODER DC en un coup d’\u0153il<\/h2>\n\n\n\n
    S\u00e9rie<\/th>Profil<\/th>Caract\u00e9ristique cl\u00e9<\/th>Application principale<\/th><\/tr><\/thead>
    DC2<\/strong><\/td>Standard<\/td>\u00c9clairage \u00e0 faible angle<\/td>D\u00e9tection de d\u00e9fauts de surface et de rayures<\/td><\/tr>
    DC3<\/strong><\/td>Plat, \u00e0 flux \u00e9lev\u00e9<\/td>Forte luminosit\u00e9, compact<\/td>Inspection g\u00e9n\u00e9rale, espaces r\u00e9duits<\/td><\/tr>
    DC4<\/strong><\/td>Plat, lentilles int\u00e9gr\u00e9es<\/td>Sortie focalis\u00e9e et concentr\u00e9e<\/td>T\u00e2ches \u00e0 grande vitesse et haut contraste<\/td><\/tr>
    DC5<\/strong><\/td>Matrice plate \u00e0 flux \u00e9lev\u00e9<\/td>Inspection continue exigeante<\/td>\u00c9lectronique, composants automobiles<\/td><\/tr>
    DC6<\/strong><\/td>Matrice plate, compacte<\/td>Format haute densit\u00e9, montable sur cam\u00e9ra<\/td>Int\u00e9gration OEM compacte<\/td><\/tr>
    DC7<\/strong><\/td>Matrice plate grand format<\/td>Couverture circulaire sur grande surface<\/td>Pi\u00e8ces de grandes dimensions, inspections \u00e0 large champ<\/td><\/tr>
    DC8<\/strong><\/td>Nouvelle g\u00e9n\u00e9ration<\/td>Gestion thermique avanc\u00e9e<\/td>Syst\u00e8mes AOI nouvelle g\u00e9n\u00e9ration<\/td><\/tr>
    DC9<\/strong><\/td>Nouvelle g\u00e9n\u00e9ration<\/td>Matrice \u00e0 haut rendement<\/td>Lignes d’inspection automatis\u00e9es<\/td><\/tr>
    RDL1<\/strong><\/td>Angle r\u00e9glable<\/td>Flexibilit\u00e9 multi-g\u00e9om\u00e9tries<\/td>Stations flexibles multi-produits<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

    Recommandations d’int\u00e9gration<\/h2>\n\n\n\n

    Ring illuminators perform best when the inner diameter is sized to match the camera lens diameter with minimal clearance, and the outer diameter is sized to cover the full field of view at the intended working distance. Undersizing the ring relative to the field of view produces characteristic dark corner vignetting in the acquired image \u2014 a common setup error that is entirely preventable through correct pre-installation sizing.<\/p>\n\n\n\n

    For applications where a ring light produces excessive central reflection on polished or mirror-finish surfaces, a flat dome illuminator from the RODER FD series is the recommended alternative. The FD series generates fully diffuse illumination that eliminates specular highlights across the entire surface \u2014 complementing the ring light range for reflective-surface inspection tasks.<\/p>\n\n\n\n

    Pour un accompagnement de configuration sp\u00e9cifique \u00e0 votre application, l’\u00e9quipe technique RODER Vision est disponible pour vous assister sur le dimensionnement de l’illuminateur, le choix de la longueur d’onde et la conception d’int\u00e9gration.<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

    Ring light illuminators are the most widely used front illumination solution in industrial machine vision. Mounted coaxially around the camera lens, they deliver uniform, shadow-free light directly onto the inspected surface \u2014 eliminating the directional artifacts that single-source illuminators introduce at the edges of the field of view. RODER Vision’s DC series covers the full […]<\/p>\n","protected":false},"author":157040980,"featured_media":9563,"parent":9540,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_coblocks_attr":"","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":"","_wpcom_ai_launchpad_about_page":false,"footnotes":""},"class_list":["post-9562","page","type-page","status-publish","has-post-thumbnail","hentry"],"yoast_head":"\nIlluminateurs LED annulaires pour vision industrielle<\/title>\n<meta name=\"description\" content=\"Illuminateurs LED annulaires RODER Vision pour vision industrielle. 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