{"id":10278,"date":"2026-06-21T02:30:00","date_gmt":"2026-06-21T00:30:00","guid":{"rendered":"https:\/\/rodervision.com\/non-classe\/miniature-led-illuminators-for-backlight-applications-on-very-small-objects\/"},"modified":"2026-05-25T17:21:40","modified_gmt":"2026-05-25T15:21:40","slug":"miniature-led-illuminators-for-backlight-applications-on-very-small-objects","status":"publish","type":"post","link":"https:\/\/rodervision.com\/fr\/uncategorized\/miniature-led-illuminators-for-backlight-applications-on-very-small-objects\/","title":{"rendered":"Miniature LED illuminators for backlight applications on very small objects"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Inspecting very small components with machine vision requires illumination that can deliver high uniformity, precise geometry, and stable light intensity in compact form factors. Standard illuminators are often oversized for miniature inspection setups. Miniature LED illuminators fill this gap, enabling engineers to build precise backlight and shadow-projection systems for small objects, delicate parts, and tight working distances.<\/p>\n\n<p class=\"wp-block-paragraph\">Shadow-based inspection relies on the silhouette contrast between the object and a uniformly illuminated background. The quality of this contrast depends entirely on the uniformity, intensity, and geometry of the backlight source. Miniature LED illuminators designed for backlight applications use opal diffuser glass to create a homogeneous emitting surface \u2014 ideal for dimensional measurement, profile inspection, and defect detection on small parts.<\/p>\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<div class=\"wp-block-cover is-light popmake-4066\" style=\"border-width:1px;min-height:250px;aspect-ratio:unset;\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"1022\" height=\"213\" class=\"wp-block-cover__image-background wp-image-4069 size-full\" alt=\"\" src=\"https:\/\/i0.wp.com\/rodervision.com\/wp-content\/uploads\/2024\/12\/banner_supporto_tecnico_1200x250-1024x213-1.webp?resize=1022%2C213&#038;ssl=1\" data-object-fit=\"cover\" srcset=\"https:\/\/i0.wp.com\/rodervision.com\/wp-content\/uploads\/2024\/12\/banner_supporto_tecnico_1200x250-1024x213-1.webp?w=1022&amp;ssl=1 1022w, https:\/\/i0.wp.com\/rodervision.com\/wp-content\/uploads\/2024\/12\/banner_supporto_tecnico_1200x250-1024x213-1.webp?resize=300%2C63&amp;ssl=1 300w, https:\/\/i0.wp.com\/rodervision.com\/wp-content\/uploads\/2024\/12\/banner_supporto_tecnico_1200x250-1024x213-1.webp?resize=768%2C160&amp;ssl=1 768w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><span aria-hidden=\"true\" class=\"wp-block-cover__background has-background-dim\" style=\"background-color:#dadde3\"><\/span><div class=\"wp-block-cover__inner-container is-layout-constrained wp-container-core-cover-is-layout-a304f9a9 wp-block-cover-is-layout-constrained\">\n<p class=\"has-text-align-left has-ti-fg-color has-text-color has-link-color wp-elements-59af9040aa3499f80c7439626d5b4ada wp-block-paragraph\" style=\"font-size:clamp(21.536px, 1.346rem + ((1vw - 3.2px) * 1.642), 35px);\"><strong>Vous souhaitez de l&rsquo;aide pour choisir le produit ?<\/strong><\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button popmake-4066\"><a class=\"wp-block-button__link wp-element-button\">Cliquez ici !<\/a><\/div>\n<\/div>\n<\/div><\/div>\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<h2 class=\"wp-block-heading\">Backlight Machine Vision on Small Objects: Technical Requirements<\/h2>\n\n<p class=\"wp-block-paragraph\">When designing a vision system for small object inspection, the illuminator must match the object size and the camera field of view. Using an oversized backlight introduces edge effects and reduces contrast uniformity. Miniature backlights solve this by concentrating the light output on the target zone only.<\/p>\n\n<h3 class=\"wp-block-heading\">Param\u00e8tres cl\u00e9s pour le choix d&rsquo;un r\u00e9tro\u00e9clairage miniature<\/h3>\n\n<ul class=\"wp-block-list\">\n<li><strong>Active area size:<\/strong> must match or slightly exceed the object footprint<\/li>\n\n\n\n<li><strong>Uniformity (COV):<\/strong> critical for consistent silhouette edges<\/li>\n\n\n\n<li><strong>Diffusion grade:<\/strong> opal glass vs. standard glass for shadow projection<\/li>\n\n\n\n<li><strong>LED wavelength:<\/strong> monochromatic vs. white depending on camera and filter setup<\/li>\n\n\n\n<li><strong>Working distance:<\/strong> the illuminator must fit within tight mechanical constraints<\/li>\n\n\n\n<li><strong>Electrical interface:<\/strong> M12 connector for industrial use or bare wire for OEM mounting<\/li>\n<\/ul>\n\n<h3 class=\"wp-block-heading\">Projection d&rsquo;ombre : comment \u00e7a marche<\/h3>\n\n<p class=\"wp-block-paragraph\">Shadow projection is one of the most reliable techniques for dimensional control in machine vision. The object is placed between the camera and the backlight. The LED illuminator creates a uniform emitting surface behind the part. The camera captures the resulting silhouette \u2014 a sharp-edged shadow \u2014 which software algorithms process to extract dimensional data, detect missing features, or verify geometric profiles.<\/p>\n\n<p class=\"wp-block-paragraph\">This technique is particularly effective for: diameter and length measurement of turned parts, connector pin presence verification, burr detection on injection-molded components, gap measurement in assembled subassemblies, and profile inspection of medical devices.<\/p>\n\n<h2 class=\"wp-block-heading\">S\u00e9rie DL3M : illuminateurs LED miniatures haute intensit\u00e9<\/h2>\n\n<p class=\"wp-block-paragraph\">The RODER DL3M Series is designed for applications requiring compact, high-intensity illumination in a miniature housing. The series supports both direct illumination and, when equipped with opal diffuser glass, backlight configurations for shadow-projection inspection. DL3M modules feature high-flux LEDs available in multiple wavelengths including white, red, blue, green, and infrared.<\/p>\n\n<p class=\"wp-block-paragraph\">DL3M illuminators can be used as standalone point backlights or combined in small arrays for slightly larger inspection areas. Their compact form factor and M12 electrical interface make them easy to integrate into robotic cells, desktop inspection stations, and OEM machine vision modules.<\/p>\n\n<h3 class=\"wp-block-heading\">Points techniques DL3M<\/h3>\n\n<ul class=\"wp-block-list\">\n<li>Bo\u00eetier compact, surface active \u00e0 partir de 25&#215;25 mm<\/li>\n\n\n\n<li>LED \u00e0 flux \u00e9lev\u00e9 pour intensit\u00e9 maximale en petits formats<\/li>\n\n\n\n<li>Available with standard glass or opal glass for diffuse backlight<\/li>\n\n\n\n<li>Wavelength options: white, red 625 nm, blue 470 nm, NIR 850 nm<\/li>\n\n\n\n<li>Modes de fonctionnement continu et stroboscopique<\/li>\n\n\n\n<li>Connecteur M12 ou c\u00e2bles volants pour int\u00e9gration OEM<\/li>\n\n\n\n<li>Bo\u00eetier en aluminium avec gestion thermique passive<\/li>\n<\/ul>\n\n<h2 class=\"wp-block-heading\">Selecting the Right Illuminator for Miniature Backlight Systems<\/h2>\n\n<p class=\"wp-block-paragraph\">For applications where the field of view is very small, engineers can also use compact BL-series backlight panels. RODER BL2 and BL3 series offer uniform LED backlights in small and medium formats, delivering high uniformity and optimised diffuser optics for dimensional and profile inspection.<\/p>\n\n<p class=\"wp-block-paragraph\">When the inspection involves small reflective or curved components viewed from the front, low-angle ring illuminators such as the DC2 series provide grazing-incidence illumination to enhance surface relief and edge contrast \u2014 a complementary technique to backlight for comprehensive small-part inspection.<\/p>\n\n<h3 class=\"wp-block-heading\">Comparaison : techniques d&rsquo;\u00e9clairage pour l&rsquo;inspection de petits objets<\/h3>\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>Technique<\/th><th>Id\u00e9al pour<\/th><th>RODER Series<\/th><\/tr><\/thead><tbody><tr><td>R\u00e9tro\u00e9clairage diffus<\/td><td>Mesure dimensionnelle, profil, silhouette<\/td><td>DL3M opale, BL2, BL3<\/td><\/tr><tr><td>Anneau lumineux \u00e0 faible angle<\/td><td>Relief de surface, d\u00e9tection de bords, gravure<\/td><td>S\u00e9rie DC2<\/td><\/tr><tr><td>\u00c9clairage frontal direct<\/td><td>Inspection de couleur et de texture de surface<\/td><td>DL3M avec verre standard<\/td><\/tr><\/tbody><\/table><\/figure>\n\n<h2 class=\"wp-block-heading\">Notes d&rsquo;int\u00e9gration pour les ing\u00e9nieurs<\/h2>\n\n<ul class=\"wp-block-list\">\n<li><strong>Mounting:<\/strong> use threaded holes on the illuminator housing for rigid fixturing<\/li>\n\n\n\n<li><strong>Power supply:<\/strong> connect to a RODER LED driver or compatible constant-current controller<\/li>\n\n\n\n<li><strong>Strobe mode:<\/strong> sync the illuminator to the camera trigger for exposure-matched pulsing<\/li>\n\n\n\n<li><strong>Ambient light rejection:<\/strong> pair with narrow-band filters on the camera lens in bright factory environments<\/li>\n\n\n\n<li><strong>Thermal management:<\/strong> ensure adequate airflow for long continuous-duty cycles<\/li>\n<\/ul>\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<h2 class=\"wp-block-heading has-text-align-center has-ti-accent-color has-text-color has-background has-link-color wp-elements-d38eb0ffbabed4e19887dd739714bcb9\" style=\"border-top-left-radius:30px;border-top-right-radius:30px;border-bottom-left-radius:30px;border-bottom-right-radius:30px;background-color:#dddddd\">Produits et technologies<\/h2>\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<h2 class=\"wp-block-heading\">Familles d&rsquo;illuminateurs RODER pour l&rsquo;inspection de petits objets<\/h2>\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-7387b849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-medium\"><a href=\"https:\/\/rodervision.com\/fr\/products\/illuminateurs-led-spot\/high-intensity-spot-led-illuminators-dl3m-series\/\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"600\" src=\"https:\/\/i0.wp.com\/rodervision.com\/wp-content\/uploads\/2020\/10\/roder_vision_dl3m_led_lighter_vision_systems_600x600.jpg?resize=600%2C600&#038;ssl=1\" alt=\"DL3M miniature LED illuminator for machine vision backlight and shadow projection\" class=\"wp-image-465\" srcset=\"https:\/\/i0.wp.com\/rodervision.com\/wp-content\/uploads\/2020\/10\/roder_vision_dl3m_led_lighter_vision_systems_600x600.jpg?w=600&amp;ssl=1 600w, https:\/\/i0.wp.com\/rodervision.com\/wp-content\/uploads\/2020\/10\/roder_vision_dl3m_led_lighter_vision_systems_600x600.jpg?resize=300%2C300&amp;ssl=1 300w, https:\/\/i0.wp.com\/rodervision.com\/wp-content\/uploads\/2020\/10\/roder_vision_dl3m_led_lighter_vision_systems_600x600.jpg?resize=150%2C150&amp;ssl=1 150w, https:\/\/i0.wp.com\/rodervision.com\/wp-content\/uploads\/2020\/10\/roder_vision_dl3m_led_lighter_vision_systems_600x600.jpg?resize=400%2C400&amp;ssl=1 400w, https:\/\/i0.wp.com\/rodervision.com\/wp-content\/uploads\/2020\/10\/roder_vision_dl3m_led_lighter_vision_systems_600x600.jpg?resize=200%2C200&amp;ssl=1 200w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/a><figcaption class=\"wp-element-caption\"><strong><a href=\"https:\/\/rodervision.com\/fr\/products\/illuminateurs-led-spot\/high-intensity-spot-led-illuminators-dl3m-series\/\">DL3M Series<\/a><\/strong><br\/>Miniature LED illuminators \u2014 compact housing from 25&#215;25 mm, opal glass option for diffuse backlight, wavelengths from UV to NIR<\/figcaption><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-medium\"><a href=\"https:\/\/rodervision.com\/fr\/products\/led-backlight-illuminators\/led-backlight-illuminators-bl2-series\/\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"2000\" height=\"2000\" src=\"https:\/\/i0.wp.com\/rodervision.com\/wp-content\/uploads\/2025\/10\/roder_vision_bl2_backlight_led_illuminator_100x100_masterimage_2000x2000.png?resize=2000%2C2000&#038;ssl=1\" alt=\"BL2 compact backlight LED illuminator for dimensional inspection and silhouette machine vision\" class=\"wp-image-6887\" srcset=\"https:\/\/i0.wp.com\/rodervision.com\/wp-content\/uploads\/2025\/10\/roder_vision_bl2_backlight_led_illuminator_100x100_masterimage_2000x2000.png?w=2000&amp;ssl=1 2000w, https:\/\/i0.wp.com\/rodervision.com\/wp-content\/uploads\/2025\/10\/roder_vision_bl2_backlight_led_illuminator_100x100_masterimage_2000x2000.png?resize=300%2C300&amp;ssl=1 300w, https:\/\/i0.wp.com\/rodervision.com\/wp-content\/uploads\/2025\/10\/roder_vision_bl2_backlight_led_illuminator_100x100_masterimage_2000x2000.png?resize=1024%2C1024&amp;ssl=1 1024w, https:\/\/i0.wp.com\/rodervision.com\/wp-content\/uploads\/2025\/10\/roder_vision_bl2_backlight_led_illuminator_100x100_masterimage_2000x2000.png?resize=150%2C150&amp;ssl=1 150w, https:\/\/i0.wp.com\/rodervision.com\/wp-content\/uploads\/2025\/10\/roder_vision_bl2_backlight_led_illuminator_100x100_masterimage_2000x2000.png?resize=768%2C768&amp;ssl=1 768w, https:\/\/i0.wp.com\/rodervision.com\/wp-content\/uploads\/2025\/10\/roder_vision_bl2_backlight_led_illuminator_100x100_masterimage_2000x2000.png?resize=1536%2C1536&amp;ssl=1 1536w, https:\/\/i0.wp.com\/rodervision.com\/wp-content\/uploads\/2025\/10\/roder_vision_bl2_backlight_led_illuminator_100x100_masterimage_2000x2000.png?resize=120%2C120&amp;ssl=1 120w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/a><figcaption class=\"wp-element-caption\"><strong><a href=\"https:\/\/rodervision.com\/fr\/products\/led-backlight-illuminators\/led-backlight-illuminators-bl2-series\/\">BL2 Series<\/a><\/strong><br\/>Compact backlight LED illuminators \u2014 active areas from 50&#215;50 mm, high uniformity diffuser, continuous and strobe modes<\/figcaption><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-medium\"><a href=\"https:\/\/rodervision.com\/fr\/products\/led-backlight-illuminators\/serie-bl3-retroeclairage-led-illuminateurs-led-pour-la-vision-industrielle\/\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"2000\" height=\"2000\" src=\"https:\/\/i0.wp.com\/rodervision.com\/wp-content\/uploads\/2025\/10\/roder_vision_BL3_backlight_led_illuminators_500x500_masterimage_2000x2000.png?resize=2000%2C2000&#038;ssl=1\" alt=\"BL3 high-intensity backlight LED illuminator for profile and dimensional machine vision inspection\" class=\"wp-image-6749\" srcset=\"https:\/\/i0.wp.com\/rodervision.com\/wp-content\/uploads\/2025\/10\/roder_vision_BL3_backlight_led_illuminators_500x500_masterimage_2000x2000.png?w=2000&amp;ssl=1 2000w, https:\/\/i0.wp.com\/rodervision.com\/wp-content\/uploads\/2025\/10\/roder_vision_BL3_backlight_led_illuminators_500x500_masterimage_2000x2000.png?resize=300%2C300&amp;ssl=1 300w, https:\/\/i0.wp.com\/rodervision.com\/wp-content\/uploads\/2025\/10\/roder_vision_BL3_backlight_led_illuminators_500x500_masterimage_2000x2000.png?resize=1024%2C1024&amp;ssl=1 1024w, https:\/\/i0.wp.com\/rodervision.com\/wp-content\/uploads\/2025\/10\/roder_vision_BL3_backlight_led_illuminators_500x500_masterimage_2000x2000.png?resize=150%2C150&amp;ssl=1 150w, https:\/\/i0.wp.com\/rodervision.com\/wp-content\/uploads\/2025\/10\/roder_vision_BL3_backlight_led_illuminators_500x500_masterimage_2000x2000.png?resize=768%2C768&amp;ssl=1 768w, https:\/\/i0.wp.com\/rodervision.com\/wp-content\/uploads\/2025\/10\/roder_vision_BL3_backlight_led_illuminators_500x500_masterimage_2000x2000.png?resize=1536%2C1536&amp;ssl=1 1536w, https:\/\/i0.wp.com\/rodervision.com\/wp-content\/uploads\/2025\/10\/roder_vision_BL3_backlight_led_illuminators_500x500_masterimage_2000x2000.png?resize=120%2C120&amp;ssl=1 120w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/a><figcaption class=\"wp-element-caption\"><strong><a href=\"https:\/\/rodervision.com\/fr\/products\/led-backlight-illuminators\/serie-bl3-retroeclairage-led-illuminateurs-led-pour-la-vision-industrielle\/\">BL3 Series<\/a><\/strong><br\/>High-intensity backlight LED illuminators \u2014 high-brightness LEDs, optimised diffuser optics, formats from 100&#215;100 mm to 500&#215;500 mm<\/figcaption><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-medium\"><a href=\"https:\/\/rodervision.com\/fr\/products\/led-ring-illuminators\/low-angle-led-ring-lights-dc2-series\/\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"600\" src=\"https:\/\/i0.wp.com\/rodervision.com\/wp-content\/uploads\/2020\/10\/roder_vision_dc2_low_angle_ring_led_illuminators_masterimage_600x600.png?resize=600%2C600&#038;ssl=1\" alt=\"DC2 low-angle ring LED illuminator for surface defect detection and edge contrast on small parts\" class=\"wp-image-602\" srcset=\"https:\/\/i0.wp.com\/rodervision.com\/wp-content\/uploads\/2020\/10\/roder_vision_dc2_low_angle_ring_led_illuminators_masterimage_600x600.png?w=600&amp;ssl=1 600w, https:\/\/i0.wp.com\/rodervision.com\/wp-content\/uploads\/2020\/10\/roder_vision_dc2_low_angle_ring_led_illuminators_masterimage_600x600.png?resize=300%2C300&amp;ssl=1 300w, https:\/\/i0.wp.com\/rodervision.com\/wp-content\/uploads\/2020\/10\/roder_vision_dc2_low_angle_ring_led_illuminators_masterimage_600x600.png?resize=150%2C150&amp;ssl=1 150w, https:\/\/i0.wp.com\/rodervision.com\/wp-content\/uploads\/2020\/10\/roder_vision_dc2_low_angle_ring_led_illuminators_masterimage_600x600.png?resize=400%2C400&amp;ssl=1 400w, https:\/\/i0.wp.com\/rodervision.com\/wp-content\/uploads\/2020\/10\/roder_vision_dc2_low_angle_ring_led_illuminators_masterimage_600x600.png?resize=200%2C200&amp;ssl=1 200w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/a><figcaption class=\"wp-element-caption\"><strong><a href=\"https:\/\/rodervision.com\/fr\/products\/led-ring-illuminators\/low-angle-led-ring-lights-dc2-series\/\">DC2 Series<\/a><\/strong><br\/>Low-angle ring LED illuminators \u2014 grazing incidence illumination for surface relief, scratch detection, and edge contrast on small components<\/figcaption><\/figure>\n<\/div>\n<\/div>\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<h2 class=\"wp-block-heading has-text-align-center has-ti-accent-color has-text-color has-background has-link-color wp-elements-4ea8d5ca842a07326bed67b625acd113\" style=\"border-top-left-radius:30px;border-top-right-radius:30px;border-bottom-left-radius:30px;border-bottom-right-radius:30px;background-color:#dddddd\">Questions fr\u00e9quemment pos\u00e9es<\/h2>\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<div class=\"schema-faq wp-block-yoast-faq-block wp-block-faq\"><div class=\"schema-faq-section\" id=\"faq-q1\"><strong class=\"schema-faq-question\">What are miniature LED illuminators used for in machine vision?<\/strong> <p class=\"schema-faq-answer\">Miniature LED illuminators are used for backlight inspection, shadow projection, and dimensional measurement of very small components. They also fit compact vision systems where standard-size illuminators would not integrate mechanically.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-q2\"><strong class=\"schema-faq-question\">What is the difference between a standard and a miniature backlight illuminator?<\/strong> <p class=\"schema-faq-answer\">A miniature backlight illuminator has a smaller active emitting area matched to compact or macro optics. It delivers uniform illumination in a much smaller housing, enabling integration in tight inspection stations and OEM modules.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-q3\"><strong class=\"schema-faq-question\">Can the DL3M series be used as a backlight for shadow projection?<\/strong> <p class=\"schema-faq-answer\">Yes. When equipped with opal diffuser glass, DL3M illuminators produce a uniformly diffused light surface suitable for shadow-projection dimensional inspection.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-q4\"><strong class=\"schema-faq-question\">Which LED wavelength is best for backlight inspection of small parts?<\/strong> <p class=\"schema-faq-answer\">Red (625 nm) is preferred for sharp silhouette edges. NIR (850 nm) works for translucent materials. White light suits general-purpose inspection.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-q5\"><strong class=\"schema-faq-question\">How do I select the correct backlight size for a miniature inspection application?<\/strong> <p class=\"schema-faq-answer\">The active area should match or slightly exceed the object footprint. For very small objects, the DL3M series or BL2 compact panels are the recommended starting point.<\/p> <\/div> <\/div>\n\n<script type=\"application\/ld+json\">\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@graph\": [\n    {\n      \"@type\": \"Article\",\n      \"headline\": \"Miniature LED Illuminators for Backlight Applications on Very Small Objects\",\n      \"description\": \"Technical guide on selecting miniature LED illuminators for backlight and shadow projection machine vision on small components.\",\n      \"author\": {\"@type\": \"Organization\", \"name\": \"RODER Vision\", \"url\": \"https:\/\/www.rodervision.com\"},\n      \"publisher\": {\"@type\": \"Organization\", \"name\": \"RODER Vision\", \"url\": \"https:\/\/www.rodervision.com\"},\n      \"datePublished\": \"2026-03-02\",\n      \"dateModified\": \"2026-03-02\"\n    },\n    {\n      \"@type\": \"FAQPage\",\n      \"mainEntity\": [\n        {\"@type\": \"Question\", \"name\": \"What are miniature LED illuminators used for in machine vision?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"They are used for backlight inspection, shadow projection, and dimensional measurement of very small components.\"}},\n        {\"@type\": \"Question\", \"name\": \"Can the DL3M series be used as a backlight for shadow projection?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. When equipped with opal diffuser glass, DL3M illuminators produce a uniformly diffused light surface for shadow-projection setups.\"}},\n        {\"@type\": \"Question\", \"name\": \"Which LED wavelength is best for backlight inspection of small parts?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Red (625 nm) is preferred for sharp silhouette edges. NIR (850 nm) works for translucent materials. White light suits general-purpose inspection.\"}}\n      ]\n    }\n  ]\n}\n<\/script>\n\n<div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\">\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h4 class=\"wp-block-heading has-ti-accent-color has-text-color has-link-color wp-elements-5c6fac973246a8b333aa3499acf8a497\">Contacts et informations<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Contact pour informations g\u00e9n\u00e9rales : <a href=\"mailto:info@roder.it\">info@roder.it<\/a><br\/>Partenaire d&rsquo;int\u00e9gration de syst\u00e8mes et de capteurs : <a href=\"http:\/\/www.roder.it\">www.roder.it<\/a><br\/>Division Vision Artificielle de RODER :<a href=\"http:\/\/rodervision.com\/fr\/\"> www.rodervision.com<\/a><br\/>Division Instruments de RODER : <a href=\"http:\/\/rodervision.com\/fr\/\">www.innovacheck.com<\/a><br\/>Plus d&rsquo;informations sur RODER VISION : <a href=\"https:\/\/rodervision.com\/about-us\/\">about us<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Les informations contenues sur ce site web sont fournies uniquement \u00e0 des fins d&rsquo;information. Bien qu&rsquo;elles aient \u00e9t\u00e9 pr\u00e9par\u00e9es avec le plus grand soin, elles ne constituent pas une offre contractuelle ni un engagement contraignant de fourniture. Elles peuvent contenir des erreurs de transcription, de traduction ou des erreurs typographiques. Pour obtenir des informations pr\u00e9cises et \u00e0 jour, veuillez contacter directement notre entreprise.   <\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Veuillez noter:<\/strong> Certaines images de ce site web ont \u00e9t\u00e9 intentionnellement g\u00e9n\u00e9r\u00e9es par Intelligence Artificielle (IA). Cela est d\u00fb au fait que, pour de nombreuses applications et de nombreux projets, il n&rsquo;est pas possible de divulguer des photographies de l&rsquo;installation ou du syst\u00e8me r\u00e9el en raison d&rsquo;accords de confidentialit\u00e9, de clauses contractuelles et d&rsquo;accords de non-divulgation (NDA). <\/p>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Miniature LED illuminators for backlight machine vision: selecting the right illuminator for shadow projection, dimensional measurement and defect detection on very small components. 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