{"id":25370,"date":"2026-07-06T11:47:03","date_gmt":"2026-07-06T09:47:03","guid":{"rendered":"https:\/\/www.tpl-vision.com\/anwendungen\/how-to-set-up-lighting-for-2d-dot-peened-code-reading\/"},"modified":"2026-07-10T16:56:00","modified_gmt":"2026-07-10T14:56:00","slug":"how-to-set-up-lighting-for-2d-dot-peened-code-reading","status":"publish","type":"post","link":"https:\/\/www.tpl-vision.com\/de\/wissensbereich\/how-to-set-up-lighting-for-2d-dot-peened-code-reading\/","title":{"rendered":"How to Set Up Lighting for 2D Dot-Peened Code Reading"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"25370\" class=\"elementor elementor-25370 elementor-23780\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-fc9c466 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"fc9c466\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-wide\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-1098efa\" data-id=\"1098efa\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-cfc9a48 elementor-widget elementor-widget-heading\" data-id=\"cfc9a48\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.19.0 - 07-02-2024 *\/\n.elementor-heading-title{padding:0;margin:0;line-height:1}.elementor-widget-heading .elementor-heading-title[class*=elementor-size-]>a{color:inherit;font-size:inherit;line-height:inherit}.elementor-widget-heading .elementor-heading-title.elementor-size-small{font-size:15px}.elementor-widget-heading .elementor-heading-title.elementor-size-medium{font-size:19px}.elementor-widget-heading .elementor-heading-title.elementor-size-large{font-size:29px}.elementor-widget-heading .elementor-heading-title.elementor-size-xl{font-size:39px}.elementor-widget-heading .elementor-heading-title.elementor-size-xxl{font-size:59px}<\/style><h2 class=\"elementor-heading-title elementor-size-default\">What is Dot Peen Marking?<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-81925d7 elementor-widget elementor-widget-text-editor\" data-id=\"81925d7\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.19.0 - 07-02-2024 *\/\n.elementor-widget-text-editor.elementor-drop-cap-view-stacked .elementor-drop-cap{background-color:#69727d;color:#fff}.elementor-widget-text-editor.elementor-drop-cap-view-framed .elementor-drop-cap{color:#69727d;border:3px solid;background-color:transparent}.elementor-widget-text-editor:not(.elementor-drop-cap-view-default) .elementor-drop-cap{margin-top:8px}.elementor-widget-text-editor:not(.elementor-drop-cap-view-default) .elementor-drop-cap-letter{width:1em;height:1em}.elementor-widget-text-editor .elementor-drop-cap{float:left;text-align:center;line-height:1;font-size:50px}.elementor-widget-text-editor .elementor-drop-cap-letter{display:inline-block}<\/style>\t\t\t\t<p class=\"p1\"><strong>DOT PEEN MARKING<\/strong> is a <strong>permanent marking process<\/strong> in which a hardened stylus creates a series of closely spaced <strong>indentations<\/strong> on the surface of a component. Machines can arrange these dots in a <strong>pattern<\/strong> to create various <strong>codes<\/strong> like <strong>serial numbers<\/strong>, <strong>logos<\/strong>, and <strong>text<\/strong>. In many modern manufacturing environments, <strong>dot peen marking<\/strong> is automated to ensure accuracy and speed.  <\/p>\n<p class=\"p1\">The marking tool is precisely controlled in the <strong>X<\/strong> and <strong>Y<\/strong> directions to create dots that meet the required <strong>size<\/strong>, <strong>shape<\/strong> and <strong>spacing<\/strong> to ensure the mark is <strong>permanent<\/strong> and <strong>machine-readable<\/strong>. Machine vision systems are often used afterwards to verify that the <strong>Data Matrix code<\/strong> is readable and meets traceability requirements. <\/p>\n<p class=\"p1\">Depending on the material and surface condition of the part, <strong>surface treatment<\/strong> or <strong>preliminary machining<\/strong> may be required before <strong>dot peen marking<\/strong>. This helps create a more <strong>uniform<\/strong> marking surface, improving <strong>dot consistency<\/strong> and ensuring <strong>higher contrast<\/strong> and <strong>long-term readability<\/strong> of the code for machine vision inspection. <\/p>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-73e7cbb elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"73e7cbb\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-6c9d349\" data-id=\"6c9d349\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-cc046c2 elementor-widget elementor-widget-image\" data-id=\"cc046c2\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.19.0 - 07-02-2024 *\/\n.elementor-widget-image{text-align:center}.elementor-widget-image a{display:inline-block}.elementor-widget-image a img[src$=\".svg\"]{width:48px}.elementor-widget-image img{vertical-align:middle;display:inline-block}<\/style>\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"768\" height=\"572\" src=\"https:\/\/www.tpl-vision.com\/wp-content\/uploads\/2023\/03\/dot-peened-codes-machine-vision-768x572.png\" class=\"attachment-medium_large size-medium_large wp-image-11732\" alt=\"\" srcset=\"https:\/\/www.tpl-vision.com\/wp-content\/uploads\/2023\/03\/dot-peened-codes-machine-vision-768x572.png 768w, https:\/\/www.tpl-vision.com\/wp-content\/uploads\/2023\/03\/dot-peened-codes-machine-vision-300x223.png 300w, https:\/\/www.tpl-vision.com\/wp-content\/uploads\/2023\/03\/dot-peened-codes-machine-vision-1024x762.png 1024w, https:\/\/www.tpl-vision.com\/wp-content\/uploads\/2023\/03\/dot-peened-codes-machine-vision-1536x1144.png 1536w, https:\/\/www.tpl-vision.com\/wp-content\/uploads\/2023\/03\/dot-peened-codes-machine-vision-600x447.png 600w, https:\/\/www.tpl-vision.com\/wp-content\/uploads\/2023\/03\/dot-peened-codes-machine-vision-175x130.png 175w, https:\/\/www.tpl-vision.com\/wp-content\/uploads\/2023\/03\/dot-peened-codes-machine-vision-40x30.png 40w, https:\/\/www.tpl-vision.com\/wp-content\/uploads\/2023\/03\/dot-peened-codes-machine-vision-55x41.png 55w, https:\/\/www.tpl-vision.com\/wp-content\/uploads\/2023\/03\/dot-peened-codes-machine-vision-100x74.png 100w, https:\/\/www.tpl-vision.com\/wp-content\/uploads\/2023\/03\/dot-peened-codes-machine-vision.png 2012w\" sizes=\"(max-width: 768px) 100vw, 768px\" \/>\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\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t<div class=\"elementor-element elementor-element-1d6e2cb e-flex e-con-boxed e-con e-parent\" data-id=\"1d6e2cb\" data-element_type=\"container\" data-settings=\"{&quot;content_width&quot;:&quot;boxed&quot;}\" data-core-v316-plus=\"true\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-6c0ccf4 elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"6c0ccf4\" data-element_type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.19.0 - 07-02-2024 *\/\n.elementor-widget-divider{--divider-border-style:none;--divider-border-width:1px;--divider-color:#0c0d0e;--divider-icon-size:20px;--divider-element-spacing:10px;--divider-pattern-height:24px;--divider-pattern-size:20px;--divider-pattern-url:none;--divider-pattern-repeat:repeat-x}.elementor-widget-divider .elementor-divider{display:flex}.elementor-widget-divider .elementor-divider__text{font-size:15px;line-height:1;max-width:95%}.elementor-widget-divider .elementor-divider__element{margin:0 var(--divider-element-spacing);flex-shrink:0}.elementor-widget-divider .elementor-icon{font-size:var(--divider-icon-size)}.elementor-widget-divider .elementor-divider-separator{display:flex;margin:0;direction:ltr}.elementor-widget-divider--view-line_icon .elementor-divider-separator,.elementor-widget-divider--view-line_text .elementor-divider-separator{align-items:center}.elementor-widget-divider--view-line_icon .elementor-divider-separator:after,.elementor-widget-divider--view-line_icon .elementor-divider-separator:before,.elementor-widget-divider--view-line_text .elementor-divider-separator:after,.elementor-widget-divider--view-line_text .elementor-divider-separator:before{display:block;content:\"\";border-block-end:0;flex-grow:1;border-block-start:var(--divider-border-width) var(--divider-border-style) var(--divider-color)}.elementor-widget-divider--element-align-left .elementor-divider .elementor-divider-separator>.elementor-divider__svg:first-of-type{flex-grow:0;flex-shrink:100}.elementor-widget-divider--element-align-left .elementor-divider-separator:before{content:none}.elementor-widget-divider--element-align-left .elementor-divider__element{margin-left:0}.elementor-widget-divider--element-align-right .elementor-divider .elementor-divider-separator>.elementor-divider__svg:last-of-type{flex-grow:0;flex-shrink:100}.elementor-widget-divider--element-align-right .elementor-divider-separator:after{content:none}.elementor-widget-divider--element-align-right .elementor-divider__element{margin-right:0}.elementor-widget-divider--element-align-start .elementor-divider .elementor-divider-separator>.elementor-divider__svg:first-of-type{flex-grow:0;flex-shrink:100}.elementor-widget-divider--element-align-start .elementor-divider-separator:before{content:none}.elementor-widget-divider--element-align-start .elementor-divider__element{margin-inline-start:0}.elementor-widget-divider--element-align-end .elementor-divider .elementor-divider-separator>.elementor-divider__svg:last-of-type{flex-grow:0;flex-shrink:100}.elementor-widget-divider--element-align-end .elementor-divider-separator:after{content:none}.elementor-widget-divider--element-align-end .elementor-divider__element{margin-inline-end:0}.elementor-widget-divider:not(.elementor-widget-divider--view-line_text):not(.elementor-widget-divider--view-line_icon) .elementor-divider-separator{border-block-start:var(--divider-border-width) var(--divider-border-style) var(--divider-color)}.elementor-widget-divider--separator-type-pattern{--divider-border-style:none}.elementor-widget-divider--separator-type-pattern.elementor-widget-divider--view-line .elementor-divider-separator,.elementor-widget-divider--separator-type-pattern:not(.elementor-widget-divider--view-line) .elementor-divider-separator:after,.elementor-widget-divider--separator-type-pattern:not(.elementor-widget-divider--view-line) .elementor-divider-separator:before,.elementor-widget-divider--separator-type-pattern:not([class*=elementor-widget-divider--view]) .elementor-divider-separator{width:100%;min-height:var(--divider-pattern-height);-webkit-mask-size:var(--divider-pattern-size) 100%;mask-size:var(--divider-pattern-size) 100%;-webkit-mask-repeat:var(--divider-pattern-repeat);mask-repeat:var(--divider-pattern-repeat);background-color:var(--divider-color);-webkit-mask-image:var(--divider-pattern-url);mask-image:var(--divider-pattern-url)}.elementor-widget-divider--no-spacing{--divider-pattern-size:auto}.elementor-widget-divider--bg-round{--divider-pattern-repeat:round}.rtl .elementor-widget-divider .elementor-divider__text{direction:rtl}.e-con-inner>.elementor-widget-divider,.e-con>.elementor-widget-divider{width:var(--container-widget-width,100%);--flex-grow:var(--container-widget-flex-grow)}<\/style>\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<\/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<section class=\"elementor-section elementor-top-section elementor-element elementor-element-25af005 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"25af005\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-wide\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-e4baf2a\" data-id=\"e4baf2a\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-f9b5caa elementor-widget elementor-widget-heading\" data-id=\"f9b5caa\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Problems During Vision Inspections<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-698455b elementor-widget elementor-widget-text-editor\" data-id=\"698455b\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>Dot-peen markings are commonly applied to <strong>metallic surfaces<\/strong> with highly <strong>reflective<\/strong> finishes. Inspecting these small, closely spaced indentations requires <strong>high-contrast imaging<\/strong> at <strong>short working distances<\/strong>. However, the <strong>integrated illumination<\/strong> provided by many vision cameras is <strong>not optimised<\/strong> for such applications.  <\/p>\n<p>When <strong>coaxial<\/strong> or <strong>direct lighting<\/strong> is used on metallic surfaces, <strong>strong reflections<\/strong> can be produced, causing <strong>glare<\/strong> and unwanted <strong>highlights<\/strong> to be reflected into the camera lens, which can significantly reduce <strong>image quality<\/strong> and <strong>marking visibility<\/strong>.<\/p><\/p>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-baf014a elementor-widget elementor-widget-image\" data-id=\"baf014a\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"604\" height=\"700\" src=\"https:\/\/www.tpl-vision.com\/wp-content\/uploads\/2023\/03\/Screenshot-2023-03-07-at-15.29.55.png\" class=\"attachment-large size-large wp-image-11728\" alt=\"Dotpeen example\" srcset=\"https:\/\/www.tpl-vision.com\/wp-content\/uploads\/2023\/03\/Screenshot-2023-03-07-at-15.29.55.png 604w, https:\/\/www.tpl-vision.com\/wp-content\/uploads\/2023\/03\/Screenshot-2023-03-07-at-15.29.55-259x300.png 259w, https:\/\/www.tpl-vision.com\/wp-content\/uploads\/2023\/03\/Screenshot-2023-03-07-at-15.29.55-600x695.png 600w, https:\/\/www.tpl-vision.com\/wp-content\/uploads\/2023\/03\/Screenshot-2023-03-07-at-15.29.55-151x175.png 151w, https:\/\/www.tpl-vision.com\/wp-content\/uploads\/2023\/03\/Screenshot-2023-03-07-at-15.29.55-35x40.png 35w, https:\/\/www.tpl-vision.com\/wp-content\/uploads\/2023\/03\/Screenshot-2023-03-07-at-15.29.55-47x55.png 47w, https:\/\/www.tpl-vision.com\/wp-content\/uploads\/2023\/03\/Screenshot-2023-03-07-at-15.29.55-86x100.png 86w\" sizes=\"(max-width: 604px) 100vw, 604px\" \/>\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\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t<div class=\"elementor-element elementor-element-cbbf4f4 e-flex e-con-boxed e-con e-parent\" data-id=\"cbbf4f4\" data-element_type=\"container\" data-settings=\"{&quot;content_width&quot;:&quot;boxed&quot;}\" data-core-v316-plus=\"true\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-40e8753 elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"40e8753\" data-element_type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\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<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-9057dd3 e-flex e-con-boxed e-con e-parent\" data-id=\"9057dd3\" data-element_type=\"container\" data-settings=\"{&quot;content_width&quot;:&quot;boxed&quot;}\" data-core-v316-plus=\"true\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-9643586 elementor-widget elementor-widget-heading\" data-id=\"9643586\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">SOLUTIONS<br><br><\/h2>\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<section class=\"elementor-section elementor-top-section elementor-element elementor-element-14dfe5f elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"14dfe5f\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-wide\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-aa6cccd\" data-id=\"aa6cccd\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-354123c elementor-widget elementor-widget-heading\" data-id=\"354123c\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\"><a href=\"https:\/\/www.tpl-vision.com\/product-category\/dark-field\/\"><b>1. LOW ANGLE\/DARK FIELD<\/b><\/a><\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4a055f7 elementor-widget elementor-widget-text-editor\" data-id=\"4a055f7\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p class=\"p1\"><span class=\"s1\"><strong>Best for:&nbsp;<\/strong><br\/><\/span>Reflective metal surfaces and standard dot peen code inspection.<\/p>\n<p><strong>How it works:<\/strong><br><a href=\"https:\/\/www.tpl-vision.com\/de\/uberblick\/dunkelfeld\/mr-low-angle\/\">Low angle (dark field)<\/a> lighting projects light onto the surface at a very shallow angle. The flat surface reflects the light away from the camera and therefore appears dark. The raised edges and indentations created by the dot peen process scatter light back towards the camera, making the code appear bright against a dark background.  <\/p>\n<p><strong>Why it helps to reduce reflections:<\/strong><br\/>Because the majority of reflected light from the shiny metal surface is directed away from the camera, glare is significantly reduced. This creates excellent contrast between the code and the surrounding material. <\/p>\n<p><strong>Recommended TPL Vision products:<\/strong><\/p>\n<ul>\n<li><a href=\"https:\/\/www.tpl-vision.com\/de\/uberblick\/dunkelfeld\/mr-dark-field\/\">MR-Dark Field<\/a><\/li>\n<li><a href=\"https:\/\/www.tpl-vision.com\/de\/uberblick\/dunkelfeld\/mr-low-angle\/\">MR-Low Angle<\/a><\/li>\n<\/ul>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-7c25043\" data-id=\"7c25043\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-9f83efd elementor-widget elementor-widget-heading\" data-id=\"9f83efd\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\"><a href=\"https:\/\/www.tpl-vision.com\/product-category\/bar-lights\/\"><b>2. BAR LIGHTS<\/b><\/a><\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b21764d elementor-widget elementor-widget-text-editor\" data-id=\"b21764d\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p><strong>Best for:<\/strong> <br \/>Applications requiring flexible lighting angles or larger inspection areas.<\/p>\n<p><strong>How it works:<br \/><\/strong><a href=\"https:\/\/www.tpl-vision.com\/de\/produkt-kategorie\/balkenbeleuchtungen\/\">Bar lights<\/a> can be positioned at various angles around the part, allowing users to optimise illumination for the specific surface finish and marking characteristics. Common configurations include opposing bars, low-angle arrangements, or four-bar square setups. <\/p>\n<p><strong>Why it helps reduce reflections:<\/strong><br \/>By adjusting the angle of incidence, reflections can be directed away from the camera while maintaining strong illumination on the dot peen code. This flexibility makes bar lights particularly useful when dealing with challenging geometries or highly reflective surfaces. <\/p>\n<p><strong>Recommended TPL Vision products:<\/strong><\/p>\n<ul>\n<li><a href=\"https:\/\/www.tpl-vision.com\/de\/uberblick\/balkenbeleuchtungen\/essential-ebar\/\">EBAR+<\/a><\/li>\n<li><a href=\"https:\/\/www.tpl-vision.com\/de\/uberblick\/balkenbeleuchtungen\/high-power-strobe-hps-bar\/\">HPS Bar <\/a>(for high-speed inspections)<\/li>\n<\/ul>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t<div class=\"elementor-element elementor-element-6fed447 e-flex e-con-boxed e-con e-parent\" data-id=\"6fed447\" data-element_type=\"container\" data-settings=\"{&quot;content_width&quot;:&quot;boxed&quot;}\" data-core-v316-plus=\"true\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-c49354e elementor-widget elementor-widget-spacer\" data-id=\"c49354e\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.19.0 - 07-02-2024 *\/\n.elementor-column .elementor-spacer-inner{height:var(--spacer-size)}.e-con{--container-widget-width:100%}.e-con-inner>.elementor-widget-spacer,.e-con>.elementor-widget-spacer{width:var(--container-widget-width,var(--spacer-size));--align-self:var(--container-widget-align-self,initial);--flex-shrink:0}.e-con-inner>.elementor-widget-spacer>.elementor-widget-container,.e-con>.elementor-widget-spacer>.elementor-widget-container{height:100%;width:100%}.e-con-inner>.elementor-widget-spacer>.elementor-widget-container>.elementor-spacer,.e-con>.elementor-widget-spacer>.elementor-widget-container>.elementor-spacer{height:100%}.e-con-inner>.elementor-widget-spacer>.elementor-widget-container>.elementor-spacer>.elementor-spacer-inner,.e-con>.elementor-widget-spacer>.elementor-widget-container>.elementor-spacer>.elementor-spacer-inner{height:var(--container-widget-height,var(--spacer-size))}.e-con-inner>.elementor-widget-spacer.elementor-widget-empty,.e-con>.elementor-widget-spacer.elementor-widget-empty{position:relative;min-height:22px;min-width:22px}.e-con-inner>.elementor-widget-spacer.elementor-widget-empty .elementor-widget-empty-icon,.e-con>.elementor-widget-spacer.elementor-widget-empty .elementor-widget-empty-icon{position:absolute;top:0;bottom:0;left:0;right:0;margin:auto;padding:0;width:22px;height:22px}<\/style>\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\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<div class=\"elementor-element elementor-element-470401f e-flex e-con-boxed e-con e-parent\" data-id=\"470401f\" data-element_type=\"container\" data-settings=\"{&quot;content_width&quot;:&quot;boxed&quot;}\" data-core-v316-plus=\"true\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-df81a0a elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"df81a0a\" data-element_type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\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<\/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<section class=\"elementor-section elementor-top-section elementor-element elementor-element-7eb41c6 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"7eb41c6\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-wide\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-1eb6056\" data-id=\"1eb6056\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-6cd3d46 elementor-widget elementor-widget-heading\" data-id=\"6cd3d46\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Choosing the Right Lighting for Dot Peen Marking Inspection<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-051fed5 elementor-widget elementor-widget-text-editor\" data-id=\"051fed5\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>Choosing the most suitable lighting solution for <strong>dot-peen code inspection<\/strong> depends on <strong>factors<\/strong> such as the <strong>surface finish<\/strong>, <strong>code depth<\/strong>, <strong>available installation space<\/strong>, and <strong>inspection speed.<\/strong><\/p>\n<p><strong>LOW-ANGLE<\/strong> or <strong>DARK-FIELD<\/strong> lighting is often the preferred choice for most applications, as it creates <strong>excellent contrast<\/strong> by highlighting the <strong>indentations<\/strong> and <strong>raised edges<\/strong> of the marking while keeping the surrounding surface <strong>dark<\/strong>.<\/p>\n<p>For applications requiring <strong>greater flexibility<\/strong>, such as <strong>larger parts<\/strong> or <strong>challenging mounting conditions<\/strong>, <strong>BAR LIGHTS<\/strong> allow users to <strong>adjust the lighting angle<\/strong> and <strong>configuration<\/strong> to optimise <strong>contrast<\/strong> and <strong>code visibility<\/strong>. High-output <a href=\"https:\/\/www.tpl-vision.com\/de\/produkt-kategorie\/balkenbeleuchtungen\/\">bar lights<\/a> are also well suited to <strong>high-speed production lines<\/strong> where short exposure times and maximum illumination are <strong>essential<\/strong>. <\/p>\n<p><strong>Finding the appropriate lighting technology and positioning, manufacturers can significantly improve code readability, reduce inspection errors, and ensure reliable traceability throughout the production process.<\/strong><\/p><\/p>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t<div class=\"elementor-element elementor-element-f0f060f e-flex e-con-boxed e-con e-parent\" data-id=\"f0f060f\" data-element_type=\"container\" data-settings=\"{&quot;content_width&quot;:&quot;boxed&quot;}\" data-core-v316-plus=\"true\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-0ae4379 elementor-widget elementor-widget-spacer\" data-id=\"0ae4379\" data-element_type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\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<section class=\"elementor-section elementor-top-section elementor-element elementor-element-61c9224 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"61c9224\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-0debe6b\" data-id=\"0debe6b\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-0560414 elementor-widget elementor-widget-heading\" data-id=\"0560414\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Related products<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-92c4d87 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"92c4d87\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-9ec4edc\" data-id=\"9ec4edc\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-ccb1db8 elementor-grid-3 elementor-grid-tablet-3 elementor-grid-mobile-2 elementor-products-grid elementor-wc-products elementor-widget elementor-widget-woocommerce-products\" data-id=\"ccb1db8\" data-element_type=\"widget\" data-widget_type=\"woocommerce-products.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<link rel=\"stylesheet\" href=\"https:\/\/www.tpl-vision.com\/wp-content\/plugins\/elementor-pro\/assets\/css\/widget-woocommerce.min.css\"><div class=\"woocommerce columns-3 \"><ul class=\"products elementor-grid columns-3\">\n<li class=\"product type-product post-22013 status-publish first instock product_cat-balkenbeleuchtungen has-post-thumbnail shipping-taxable purchasable product-type-simple\">\n\t<a href=\"https:\/\/www.tpl-vision.com\/de\/uberblick\/balkenbeleuchtungen\/high-power-strobe-hps-bar\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\"><img decoding=\"async\" width=\"360\" height=\"360\" src=\"https:\/\/www.tpl-vision.com\/wp-content\/uploads\/2025\/11\/TPL_HPS_BAR_1_Innovators_Awards-360x360.jpg\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"\" srcset=\"https:\/\/www.tpl-vision.com\/wp-content\/uploads\/2025\/11\/TPL_HPS_BAR_1_Innovators_Awards-360x360.jpg 360w, https:\/\/www.tpl-vision.com\/wp-content\/uploads\/2025\/11\/TPL_HPS_BAR_1_Innovators_Awards-150x150.jpg 150w, https:\/\/www.tpl-vision.com\/wp-content\/uploads\/2025\/11\/TPL_HPS_BAR_1_Innovators_Awards-500x500.jpg 500w\" sizes=\"(max-width: 360px) 100vw, 360px\" \/><h3 class=\"woocommerce-loop-product__title\">High Power Strobe HPS BAR<\/h3><div class=\"usefull_links\"><\/a><a href=\"\/documents\/techsheets\/TPL_HPS-BAR_Product_Profile_EN.pdf\" class=\"technical_sheet\" target=\"_blank\" title=\"Datenblatt\"><\/a><a href=\"\/documents\/usermanuals\/TPL_HPS-BAR_Technical_User_Guide_EN.pdf\" class=\"guide_standard\" target=\"_blank\" title=\"Betriebsanleitung Standard\"><\/a><a href=\"\/documents\/drawings\/TPL_HPS-BAR_DRAWINGS.zip\" class=\"drawings\" target=\"_blank\" title=\"Zeichnungen\"><\/a><\/div><div class=\"custom-excerpt\"><ul>\n<li>Ultra Bright Strobe Barlight<\/li>\n<li>Angle Changers Flexibility<\/li>\n<li>Sizes up to 2500mm<\/li>\n<\/ul>\n<\/div><\/a><\/li>\n<li class=\"product type-product post-18101 status-publish instock product_cat-dunkelfeld has-post-thumbnail shipping-taxable purchasable product-type-simple\">\n\t<a href=\"https:\/\/www.tpl-vision.com\/de\/uberblick\/dunkelfeld\/mr-dark-field\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\"><img loading=\"lazy\" decoding=\"async\" width=\"360\" height=\"360\" src=\"https:\/\/www.tpl-vision.com\/wp-content\/uploads\/2026\/03\/TPL_MR_Dark_Field-360x360.jpg\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"\" srcset=\"https:\/\/www.tpl-vision.com\/wp-content\/uploads\/2026\/03\/TPL_MR_Dark_Field-360x360.jpg 360w, https:\/\/www.tpl-vision.com\/wp-content\/uploads\/2026\/03\/TPL_MR_Dark_Field-150x150.jpg 150w, https:\/\/www.tpl-vision.com\/wp-content\/uploads\/2026\/03\/TPL_MR_Dark_Field-500x500.jpg 500w\" sizes=\"(max-width: 360px) 100vw, 360px\" \/><h3 class=\"woocommerce-loop-product__title\">MR-Dark Field (DKF)<\/h3><div class=\"usefull_links\"><\/a><a href=\"\/documents\/techsheets\/TPL_MODULAR_RINGLIGHT_Product_Profile_EN.pdf\" class=\"technical_sheet\" target=\"_blank\" title=\"Datenblatt\"><\/a><a href=\"\/documents\/usermanuals\/TPL_MODULAR_RINGLIGHT_Notice_EN.pdf\" class=\"guide_standard\" target=\"_blank\" title=\"Betriebsanleitung Standard\"><\/a><a href=\"\/documents\/drawings\/TPL_MODULAR_RINGLIGHT_DARKFIELD.zip\" class=\"drawings\" target=\"_blank\" title=\"Zeichnungen\"><\/a><\/div><div class=\"custom-excerpt\"><ul>\n<li>Dark field light<\/li>\n<li>OverDrive, Sektoren, zweifarbig<\/li>\n<li>80mm und 130mm Innen-\u00d8<\/li>\n<\/ul>\n<\/div><\/a><\/li>\n<li class=\"product type-product post-2215 status-publish last instock product_cat-dunkelfeld has-post-thumbnail shipping-taxable purchasable product-type-simple\">\n\t<a href=\"https:\/\/www.tpl-vision.com\/de\/uberblick\/dunkelfeld\/mr-low-angle\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\"><img loading=\"lazy\" decoding=\"async\" width=\"360\" height=\"360\" src=\"https:\/\/www.tpl-vision.com\/wp-content\/uploads\/2026\/03\/TPL_MR_Low_Angle-360x360.jpg\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"\" srcset=\"https:\/\/www.tpl-vision.com\/wp-content\/uploads\/2026\/03\/TPL_MR_Low_Angle-360x360.jpg 360w, https:\/\/www.tpl-vision.com\/wp-content\/uploads\/2026\/03\/TPL_MR_Low_Angle-150x150.jpg 150w, https:\/\/www.tpl-vision.com\/wp-content\/uploads\/2026\/03\/TPL_MR_Low_Angle-500x500.jpg 500w\" sizes=\"(max-width: 360px) 100vw, 360px\" \/><h3 class=\"woocommerce-loop-product__title\">MR-Low Angle<\/h3><div class=\"usefull_links\"><\/a><a href=\"\/documents\/techsheets\/TPL_MODULAR_RINGLIGHT_Product_Profile_EN.pdf\" class=\"technical_sheet\" target=\"_blank\" title=\"Datenblatt\"><\/a><a href=\"\/documents\/usermanuals\/TPL_MODULAR_RINGLIGHT_Notice_EN.pdf\" class=\"guide_standard\" target=\"_blank\" title=\"Betriebsanleitung Standard\"><\/a><a href=\"\/documents\/drawings\/TPL_MODULAR_RINGLIGHT_LOWANGLE.zip\" class=\"drawings\" target=\"_blank\" title=\"Zeichnungen\"><\/a><\/div><div class=\"custom-excerpt\"><ul>\n<li>Leistungsstarke 45\u00b0 Flachwinkel-Beleuchtung<\/li>\n<li>OverDrive, Sektoren, zweifarbig<\/li>\n<li>80mm und 130mm Innen-\u00d8<\/li>\n<\/ul>\n<\/div><\/a><\/li>\n<\/ul>\n<\/div>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>What is Dot Peen Marking? DOT PEEN MARKING is a permanent marking process in which a hardened stylus creates a series of closely spaced indentations on the surface of a component. Machines can arrange these dots in a pattern to create various codes like serial numbers, logos, and text. In many modern manufacturing environments, dot [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":11732,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"","_seopress_titles_title":"Precision Machine Vision Lighting for Dot Peen Inspections","_seopress_titles_desc":"We share the lighting techniques needed for detailed inspections of Dot Peen Markings on shiny and reflective surfaces","_seopress_robots_index":"","_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[982],"tags":[],"_links":{"self":[{"href":"https:\/\/www.tpl-vision.com\/de\/wp-json\/wp\/v2\/posts\/25370"}],"collection":[{"href":"https:\/\/www.tpl-vision.com\/de\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.tpl-vision.com\/de\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.tpl-vision.com\/de\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.tpl-vision.com\/de\/wp-json\/wp\/v2\/comments?post=25370"}],"version-history":[{"count":1,"href":"https:\/\/www.tpl-vision.com\/de\/wp-json\/wp\/v2\/posts\/25370\/revisions"}],"predecessor-version":[{"id":25371,"href":"https:\/\/www.tpl-vision.com\/de\/wp-json\/wp\/v2\/posts\/25370\/revisions\/25371"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.tpl-vision.com\/de\/wp-json\/wp\/v2\/media\/11732"}],"wp:attachment":[{"href":"https:\/\/www.tpl-vision.com\/de\/wp-json\/wp\/v2\/media?parent=25370"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.tpl-vision.com\/de\/wp-json\/wp\/v2\/categories?post=25370"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.tpl-vision.com\/de\/wp-json\/wp\/v2\/tags?post=25370"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}