{"id":4173,"date":"2026-09-17T08:47:47","date_gmt":"2026-09-17T08:47:47","guid":{"rendered":"https:\/\/www.lmiab.se\/?page_id=4173"},"modified":"2026-09-17T08:47:49","modified_gmt":"2026-09-17T08:47:49","slug":"laser-optics-knowledge","status":"publish","type":"page","link":"https:\/\/www.lmiab.se\/en\/laser-optics-knowledge\/","title":{"rendered":"Laser Optics"},"content":{"rendered":"\n<div class=\"hero-block align wp-block-lmiab-hero\" data-rotation-speed=\"5000\">\n\t<div class=\"hero-block-media\">\n\t\t\t\t\t<div class=\"hero-slider\">\n\t\t\t\t\t\t\t\t\t<div class=\"hero-slide active\" data-index=\"0\">\n\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1774\" height=\"887\" src=\"https:\/\/www.lmiab.se\/app\/uploads\/2026\/09\/laser-optics-top.png\" class=\"hero-image not-transparent\" alt=\"\" srcset=\"https:\/\/www.lmiab.se\/app\/uploads\/2026\/09\/laser-optics-top.png 1774w, https:\/\/www.lmiab.se\/app\/uploads\/2026\/09\/laser-optics-top-300x150.png 300w, https:\/\/www.lmiab.se\/app\/uploads\/2026\/09\/laser-optics-top-1024x512.png 1024w, https:\/\/www.lmiab.se\/app\/uploads\/2026\/09\/laser-optics-top-768x384.png 768w, https:\/\/www.lmiab.se\/app\/uploads\/2026\/09\/laser-optics-top-1536x768.png 1536w\" sizes=\"auto, (max-width: 1774px) 100vw, 1774px\" data-has-transparency=\"false\" data-dominant-color=\"1f2228\" style=\"--dominant-color: #1f2228;\" \/>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\n\t\t<div class=\"hero-overlay\"><\/div>\n\t<\/div>\n\n\t<div class=\"hero-content\">\n            <div class=\"acf-innerblocks-container\">\n\n<h1 class=\"wp-block-heading has-text-align-left has-palette-color-2-color has-text-color has-link-color wp-elements-3ca3740c19aaa96975195453af33495b\">Laser Optics<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Laser optics are a central part of industrial laser systems and have a major influence on how the laser beam is transmitted, shaped, focused and ultimately applied in the process. The optics must be matched to factors such as laser wavelength, power, pulse regime, beam quality and application.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">LMI AB supplies laser optics for different laser types and industrial processes \u2013 from focusing and collimating optics to mirrors, protective windows and specialised optical components. We can also help identify the correct optical components for both new and existing laser systems.<\/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\"><a class=\"wp-block-button__link has-palette-color-4-color has-palette-color-2-background-color has-text-color has-background has-link-color wp-element-button\" href=\"https:\/\/www.lmiab.se\/en\/contact\/\">Talk to a laser specialist<\/a><\/div>\n\n\n\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link has-palette-color-4-color has-palette-color-2-background-color has-text-color has-background has-link-color wp-element-button\" href=\"https:\/\/www.lmiab.se\/en\/products\/components-spare-parts\/laser-optics\/\">Products in laser optics<\/a><\/div>\n<\/div>\n\n<\/div>    <\/div>\n<\/div>\n\n\n\n\n<div style=\"height:42px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">What Are Laser Optics?<\/h2>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-995f960e wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure data-wp-context=\"{&quot;imageId&quot;:&quot;6ab0511300c48&quot;}\" data-wp-interactive=\"core\/image\" data-wp-key=\"6ab0511300c48\" class=\"wp-block-image size-large wp-lightbox-container\"><img data-dominant-color=\"181e2c\" data-has-transparency=\"false\" style=\"--dominant-color: #181e2c;\" loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on--pointerdown=\"actions.preloadImage\" data-wp-on--pointerenter=\"actions.preloadImageWithDelay\" data-wp-on--pointerleave=\"actions.cancelPreload\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" src=\"https:\/\/www.lmiab.se\/app\/uploads\/2026\/09\/what-are-laseroptics-1024x1024.png\" alt=\"\" class=\"wp-image-4212 not-transparent\" srcset=\"https:\/\/www.lmiab.se\/app\/uploads\/2026\/09\/what-are-laseroptics-1024x1024.png 1024w, https:\/\/www.lmiab.se\/app\/uploads\/2026\/09\/what-are-laseroptics-300x300.png 300w, https:\/\/www.lmiab.se\/app\/uploads\/2026\/09\/what-are-laseroptics-150x150.png 150w, https:\/\/www.lmiab.se\/app\/uploads\/2026\/09\/what-are-laseroptics-768x768.png 768w, https:\/\/www.lmiab.se\/app\/uploads\/2026\/09\/what-are-laseroptics.png 1254w\" \/><button\n\t\t\tclass=\"lightbox-trigger\"\n\t\t\ttype=\"button\"\n\t\t\taria-haspopup=\"dialog\"\n\t\t\tdata-wp-bind--aria-label=\"state.thisImage.triggerButtonAriaLabel\"\n\t\t\tdata-wp-init=\"callbacks.initTriggerButton\"\n\t\t\tdata-wp-on--click=\"actions.showLightbox\"\n\t\t\tdata-wp-style--right=\"state.thisImage.buttonRight\"\n\t\t\tdata-wp-style--top=\"state.thisImage.buttonTop\"\n\t\t>\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewBox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\" \/>\n\t\t\t<\/svg>\n\t\t<\/button><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"wp-block-paragraph\">Laser optics is a collective term for the optical components used to transmit, direct, shape, focus or reflect a laser beam.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Unlike conventional optics, laser optics often have to withstand very high power densities while maintaining the properties of the laser beam with high precision. Even very small optical losses can become significant in a high-power laser system.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">There is therefore no universal laser optic that works for every laser system. The optics must be selected according to factors such as:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>laser wavelength<\/li>\n\n\n\n<li>laser power or pulse energy<\/li>\n\n\n\n<li>CW or pulsed operation<\/li>\n\n\n\n<li>pulse duration and repetition rate<\/li>\n\n\n\n<li>beam diameter and beam quality<\/li>\n\n\n\n<li>optical material<\/li>\n\n\n\n<li>coating<\/li>\n\n\n\n<li>function of the optic<\/li>\n\n\n\n<li>process and operating environment.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">A component that performs very well at one wavelength and power level may be completely unsuitable for another laser system.m\u00e4rkt vid en viss v\u00e5gl\u00e4ngd och effekt kan vara helt ol\u00e4mplig i ett annat lasersystem.<\/p>\n<\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<div style=\"margin-top:0;margin-bottom:0;height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-group alignfull has-background is-layout-constrained wp-block-group-is-layout-constrained\" style=\"background-color:#f4f0ec;padding-top:var(--wp--preset--spacing--80);padding-bottom:var(--wp--preset--spacing--80)\">\n<h2 class=\"wp-block-heading has-text-align-left\">How Do Laser Optics Work?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A laser beam normally passes through several optical functions on its way from the laser source to the workpiece. The exact configuration varies between laser systems, but a simplified optical chain can be described as:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Laser source \u2192 beam delivery \u2192 collimation \u2192 beam steering \u2192 focusing \u2192 process<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In fibre laser systems, the laser beam is often transmitted from the laser source through an optical fibre to a processing head. The beam is then collimated before being focused onto the workpiece.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In other systems, the beam may be transmitted through free space using mirrors and other optical components. This is common, for example, in traditional CO\u2082 laser systems.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Regardless of the configuration, the objective is the same: the laser energy must reach the process with the correct beam diameter, focus, power density and beam quality.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">From a Collimated Beam to the Focal Point<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Focusing is one of the most important functions of laser optics. A collimated laser beam passes through a focusing lens or equivalent optical system and is concentrated into a much smaller area.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">When the same laser power is concentrated onto a smaller area, the power density increases significantly. This is what makes it possible to melt, vaporise, cut, weld, mark or ablate materials.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The focal length of the focusing optics influences factors including:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>focal spot size<\/li>\n\n\n\n<li>working distance<\/li>\n\n\n\n<li>power density<\/li>\n\n\n\n<li>focusing angle<\/li>\n\n\n\n<li>the region around the focus where the beam retains useful properties.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">A shorter focal length can generally produce a smaller focal spot, but also results in a shorter working distance and less tolerance for variations in the position of the workpiece. A longer focal length provides different characteristics and may be more suitable where a greater working distance is required.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Selecting the correct focusing optics therefore always involves balancing the different requirements of the process.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Beam Quality, BPP and M\u00b2<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The quality of the laser beam influences how effectively it can be focused.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Two laser beams with the same power cannot necessarily be focused to the same spot size. Beam quality can be described using parameters such as <strong>Beam Parameter Product (BPP)<\/strong> and <strong>M\u00b2<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A laser beam with good beam quality can generally be focused to a smaller spot or maintain a small beam diameter over a longer distance than a beam with poorer beam quality.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Optics cannot improve the fundamental beam quality delivered by the laser source. However, incorrectly specified, damaged or contaminated optics can degrade the properties of the beam and consequently affect the process result.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The laser source, beam quality and optics must therefore be considered as parts of the same optical system.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Different Laser Types Place Different Demands on the Optics<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Industrial laser systems operate across a wide range of wavelengths and with very different power levels and pulse regimes. This affects which optical materials and coatings can be used.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><td><strong>Laser type \/ area<\/strong><\/td><td><strong>Example wavelength<\/strong><\/td><td><strong>Examples of optical requirements<\/strong><\/td><\/tr><\/thead><tbody><tr><td>Ytterbium fibre laser<\/td><td>around 1 \u00b5m, often approximately 1070 nm<\/td><td>Low absorption, high power handling and coatings matched to the wavelength<\/td><\/tr><tr><td>Nd:YAG<\/td><td>typically 1064 nm, also harmonic wavelengths<\/td><td>Materials and coatings matched to the respective wavelength<\/td><\/tr><tr><td>Green laser<\/td><td>for example 532 nm<\/td><td>Wavelength-specific materials and coatings<\/td><\/tr><tr><td>UV laser<\/td><td>for example 355 or 266 nm<\/td><td>UV-compatible materials, coatings and high surface quality<\/td><\/tr><tr><td>CO\u2082 laser<\/td><td>typically around 10.6 \u00b5m<\/td><td>Special IR materials, mirrors and coatings<\/td><\/tr><tr><td>Picosecond and femtosecond lasers<\/td><td>various wavelengths<\/td><td>High damage threshold and control of factors such as dispersion and spectral bandwidth<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Picosecond and femtosecond lasers are actually defined by their <strong>pulse duration rather than their wavelength<\/strong>. Ultrashort-pulse lasers can therefore operate at several different wavelengths..<\/p>\n<\/div>\n\n\n\n<div style=\"margin-top:0;margin-bottom:0;height:40px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-group is-layout-constrained wp-container-core-group-is-layout-0004cf41 wp-block-group-is-layout-constrained\">\n<h2 class=\"wp-block-heading has-palette-color-2-color has-text-color has-link-color wp-elements-9a294e6011d769b2a6a46b54a5036bc4\">Different Types of Laser Optics<\/h2>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-995f960e wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure data-wp-context=\"{&quot;imageId&quot;:&quot;6ab051130307c&quot;}\" data-wp-interactive=\"core\/image\" data-wp-key=\"6ab051130307c\" class=\"wp-block-image size-large wp-lightbox-container\"><img data-dominant-color=\"2a2f41\" data-has-transparency=\"false\" style=\"--dominant-color: #2a2f41;\" loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on--pointerdown=\"actions.preloadImage\" data-wp-on--pointerenter=\"actions.preloadImageWithDelay\" data-wp-on--pointerleave=\"actions.cancelPreload\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" src=\"https:\/\/www.lmiab.se\/app\/uploads\/2026\/09\/fokuseringsoptik-1024x1024.png\" alt=\"\" class=\"wp-image-4184 not-transparent\" srcset=\"https:\/\/www.lmiab.se\/app\/uploads\/2026\/09\/fokuseringsoptik-1024x1024.png 1024w, https:\/\/www.lmiab.se\/app\/uploads\/2026\/09\/fokuseringsoptik-300x300.png 300w, https:\/\/www.lmiab.se\/app\/uploads\/2026\/09\/fokuseringsoptik-150x150.png 150w, https:\/\/www.lmiab.se\/app\/uploads\/2026\/09\/fokuseringsoptik-768x768.png 768w, https:\/\/www.lmiab.se\/app\/uploads\/2026\/09\/fokuseringsoptik.png 1254w\" \/><button\n\t\t\tclass=\"lightbox-trigger\"\n\t\t\ttype=\"button\"\n\t\t\taria-haspopup=\"dialog\"\n\t\t\tdata-wp-bind--aria-label=\"state.thisImage.triggerButtonAriaLabel\"\n\t\t\tdata-wp-init=\"callbacks.initTriggerButton\"\n\t\t\tdata-wp-on--click=\"actions.showLightbox\"\n\t\t\tdata-wp-style--right=\"state.thisImage.buttonRight\"\n\t\t\tdata-wp-style--top=\"state.thisImage.buttonTop\"\n\t\t>\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewBox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\" \/>\n\t\t\t<\/svg>\n\t\t<\/button><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<h3 class=\"wp-block-heading\">Focusing Optics<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Focusing lenses concentrate the laser beam to the spot size and power density required by the process.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Focal length, beam diameter, beam quality and optical design together determine how the laser beam is focused.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Focusing optics are used in virtually all types of industrial laser processing, including laser cutting, laser welding, laser marking, laser cleaning and micromachining.<\/p>\n<\/div>\n<\/div>\n\n\n\n<div style=\"height:10px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-995f960e wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure data-wp-context=\"{&quot;imageId&quot;:&quot;6ab0511303d4b&quot;}\" data-wp-interactive=\"core\/image\" data-wp-key=\"6ab0511303d4b\" class=\"wp-block-image size-large wp-lightbox-container\"><img data-dominant-color=\"222c43\" data-has-transparency=\"false\" style=\"--dominant-color: #222c43;\" loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on--pointerdown=\"actions.preloadImage\" data-wp-on--pointerenter=\"actions.preloadImageWithDelay\" data-wp-on--pointerleave=\"actions.cancelPreload\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" src=\"https:\/\/www.lmiab.se\/app\/uploads\/2026\/09\/kollimeringsoptik-1024x1024.png\" alt=\"\" class=\"wp-image-4183 not-transparent\" srcset=\"https:\/\/www.lmiab.se\/app\/uploads\/2026\/09\/kollimeringsoptik-1024x1024.png 1024w, https:\/\/www.lmiab.se\/app\/uploads\/2026\/09\/kollimeringsoptik-300x300.png 300w, https:\/\/www.lmiab.se\/app\/uploads\/2026\/09\/kollimeringsoptik-150x150.png 150w, https:\/\/www.lmiab.se\/app\/uploads\/2026\/09\/kollimeringsoptik-768x768.png 768w, https:\/\/www.lmiab.se\/app\/uploads\/2026\/09\/kollimeringsoptik.png 1254w\" \/><button\n\t\t\tclass=\"lightbox-trigger\"\n\t\t\ttype=\"button\"\n\t\t\taria-haspopup=\"dialog\"\n\t\t\tdata-wp-bind--aria-label=\"state.thisImage.triggerButtonAriaLabel\"\n\t\t\tdata-wp-init=\"callbacks.initTriggerButton\"\n\t\t\tdata-wp-on--click=\"actions.showLightbox\"\n\t\t\tdata-wp-style--right=\"state.thisImage.buttonRight\"\n\t\t\tdata-wp-style--top=\"state.thisImage.buttonTop\"\n\t\t>\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewBox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\" \/>\n\t\t\t<\/svg>\n\t\t<\/button><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<h3 class=\"wp-block-heading\">Collimating Optics<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Collimating optics are used to convert a diverging laser beam into a substantially parallel beam.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In many fibre laser systems, the laser beam exits the process fibre and then passes through collimating optics before continuing to the focusing optics.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The relationship between the focal lengths of the collimating and focusing optics influences, among other things, beam magnification and the characteristics of the final focal spot..<\/p>\n<\/div>\n<\/div>\n\n\n\n<div style=\"height:10px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-995f960e 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-large\"><img data-dominant-color=\"2b2d35\" data-has-transparency=\"false\" style=\"--dominant-color: #2b2d35;\" loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" src=\"https:\/\/www.lmiab.se\/app\/uploads\/2026\/09\/speglar-1024x1024.png\" alt=\"\" class=\"wp-image-4186 not-transparent\" srcset=\"https:\/\/www.lmiab.se\/app\/uploads\/2026\/09\/speglar-1024x1024.png 1024w, https:\/\/www.lmiab.se\/app\/uploads\/2026\/09\/speglar-300x300.png 300w, https:\/\/www.lmiab.se\/app\/uploads\/2026\/09\/speglar-150x150.png 150w, https:\/\/www.lmiab.se\/app\/uploads\/2026\/09\/speglar-768x768.png 768w, https:\/\/www.lmiab.se\/app\/uploads\/2026\/09\/speglar.png 1254w\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<h3 class=\"wp-block-heading\">Mirrors<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Mirrors are used to direct and, in some cases, shape the laser beam through the system.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Unlike conventional mirrors, laser mirrors must be designed for the specific wavelength and must be capable of handling the relevant laser power or pulse energy with very low optical losses.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In CO\u2082 laser systems, mirrors may be used both within the laser resonator and in the external beam path between the laser source and the processing application. In scanner-based systems, very fast galvo mirrors are used to position the laser beam across the working area.<\/p>\n<\/div>\n<\/div>\n\n\n\n<div style=\"height:10px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-995f960e 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-large\"><img data-dominant-color=\"2e2e45\" data-has-transparency=\"false\" style=\"--dominant-color: #2e2e45;\" loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" src=\"https:\/\/www.lmiab.se\/app\/uploads\/2026\/09\/scanner-ftheta-optics-1024x1024.png\" alt=\"\" class=\"wp-image-4185 not-transparent\" srcset=\"https:\/\/www.lmiab.se\/app\/uploads\/2026\/09\/scanner-ftheta-optics-1024x1024.png 1024w, https:\/\/www.lmiab.se\/app\/uploads\/2026\/09\/scanner-ftheta-optics-300x300.png 300w, https:\/\/www.lmiab.se\/app\/uploads\/2026\/09\/scanner-ftheta-optics-150x150.png 150w, https:\/\/www.lmiab.se\/app\/uploads\/2026\/09\/scanner-ftheta-optics-768x768.png 768w, https:\/\/www.lmiab.se\/app\/uploads\/2026\/09\/scanner-ftheta-optics.png 1254w\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<h3 class=\"wp-block-heading\">Scanner and F-Theta Optics<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Laser marking and other scanner-based processes often use galvo scanners in combination with specialised focusing optics.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">An F-theta lens is designed to create a defined working field across which the laser beam can be positioned rapidly and precisely.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The scanner, galvo mirrors, F-theta optics and laser source must be dimensioned to operate together. The size of the working field influences factors including focal spot size, working distance and the overall optical design.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Learn more about scanner systems \u2192<\/strong><\/p>\n<\/div>\n<\/div>\n\n\n\n<div style=\"height:10px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-995f960e 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-large\"><img data-dominant-color=\"3d3f48\" data-has-transparency=\"false\" style=\"--dominant-color: #3d3f48;\" loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" src=\"https:\/\/www.lmiab.se\/app\/uploads\/2026\/09\/skyddsglas-1024x1024.png\" alt=\"\" class=\"wp-image-4187 not-transparent\" srcset=\"https:\/\/www.lmiab.se\/app\/uploads\/2026\/09\/skyddsglas-1024x1024.png 1024w, https:\/\/www.lmiab.se\/app\/uploads\/2026\/09\/skyddsglas-300x300.png 300w, https:\/\/www.lmiab.se\/app\/uploads\/2026\/09\/skyddsglas-150x150.png 150w, https:\/\/www.lmiab.se\/app\/uploads\/2026\/09\/skyddsglas-768x768.png 768w, https:\/\/www.lmiab.se\/app\/uploads\/2026\/09\/skyddsglas.png 1254w\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<h3 class=\"wp-block-heading\">Protective Windows<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Protective windows have a very important, although sometimes underestimated, function in industrial laser systems.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">They are positioned in front of significantly more expensive optical components and protect them against contaminants such as:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>metal spatter<\/li>\n\n\n\n<li>particles<\/li>\n\n\n\n<li>smoke and fumes<\/li>\n\n\n\n<li>dust<\/li>\n\n\n\n<li>process residues<\/li>\n\n\n\n<li>other contamination.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Protective windows are normally designed so that they can be inspected and replaced considerably more easily and economically than the focusing optics behind them.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">However, a protective window is still part of the optical beam path and must therefore have the correct material, quality and coating for the laser system.<\/p>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-group alignfull has-palette-color-8-background-color has-background is-layout-constrained wp-block-group-is-layout-constrained\" style=\"padding-top:var(--wp--preset--spacing--80);padding-bottom:var(--wp--preset--spacing--80)\">\n<h2 class=\"wp-block-heading\">Transmission, Reflection and Absorption<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">When a laser beam interacts with an optical component, the energy can essentially be <strong>transmitted, reflected or absorbed<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For a transmissive component, such as a focusing lens or protective window, the objective is normally to allow as much of the laser energy as possible to pass through the component.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For a mirror, the objective is instead to achieve very high reflectivity at the relevant wavelength.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Energy absorbed by the optics is primarily converted into heat. At low power levels, very small absorption may have limited significance, but at high laser powers even small optical losses become important.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This is one of the reasons why material, coating, surface quality and cleanliness become increasingly critical as laser power increases.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Optical Materials and Coatings<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Optical Materials<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The material must be capable of transmitting or reflecting the relevant laser wavelength while also meeting the required thermal and mechanical properties.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Depending on wavelength and application, various optical glasses, fused silica and specialised IR materials are used.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For CO\u2082 lasers operating at around 10.6 \u00b5m, <strong>zinc selenide (ZnSe)<\/strong> is a common material for transmissive optics because many conventional optical glasses do not transmit this long-wave infrared radiation.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The choice of optical material is therefore directly related to the wavelength of the laser.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Coatings<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The coating is an integral part of laser optics and may consist of extremely thin layers designed to provide specific optical properties.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Anti-reflection coatings (AR)<\/strong> are used on transmissive optics to reduce unwanted reflections and increase transmission.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>High-reflectivity coatings (HR)<\/strong> are used on mirrors to provide very high reflectivity at the intended wavelength.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Coatings can also be designed for a narrow wavelength range, multiple wavelengths or other specific optical functions.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Two lenses with identical mechanical dimensions can therefore have completely different optical properties depending on their material and coating.<\/p>\n<\/div>\n\n\n\n<div style=\"height:45px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-media-text has-media-on-the-right is-stacked-on-mobile is-vertically-aligned-center is-image-fill-element\" style=\"grid-template-columns:auto 45%\"><div class=\"wp-block-media-text__content\">\n<h2 class=\"wp-block-heading\">Laser Optics at High Power<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">As laser power increases, the demands placed on the optics also increase.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If an optical component absorbs even a very small proportion of the laser energy, the absolute amount of absorbed energy can still become significant at high power levels.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Heating can cause temperature gradients within the component and alter its optical properties. This can contribute to <strong>thermal lensing<\/strong>, where temperature changes affect how the laser beam is refracted and consequently shift or distort the focus.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In a high-power laser system, factors such as the following therefore become particularly important:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>very low absorption<\/li>\n\n\n\n<li>high optical quality<\/li>\n\n\n\n<li>correct coating<\/li>\n\n\n\n<li>effective cooling where required<\/li>\n\n\n\n<li>clean optical surfaces<\/li>\n\n\n\n<li>regular inspection of protective windows<\/li>\n\n\n\n<li>stable temperature and process environment.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The higher the laser power, the more important it becomes to maintain control over the entire optical chain.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Contamination \u2013 a Small Problem with Potentially Major Consequences<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Cleanliness is critical to the performance of laser optics.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Dust, smoke, metal particles or other contaminants on an optical surface can absorb laser energy. This can cause local heating and, in some cases, damage both the coating and the optical material itself.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The problem can then accelerate. A small damaged area may absorb additional energy, producing more heat and further deterioration.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In a processing head, the protective window therefore provides an important barrier between the industrial process and the more sensitive optics inside the head.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A contaminated or damaged protective window can contribute to:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>changes in focal position<\/li>\n\n\n\n<li>reduced process stability<\/li>\n\n\n\n<li>reduced transmission<\/li>\n\n\n\n<li>local heating<\/li>\n\n\n\n<li>shorter service life of downstream optics<\/li>\n\n\n\n<li>in severe cases, damage to more expensive optical components.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Inspection of protective windows and other process-near optics is therefore an important part of preventive maintenance.<\/p>\n<\/div><figure class=\"wp-block-media-text__media\"><img data-dominant-color=\"453d47\" data-has-transparency=\"false\" loading=\"lazy\" decoding=\"async\" width=\"683\" height=\"1024\" src=\"https:\/\/www.lmiab.se\/app\/uploads\/2026\/09\/optik-hogeffekt-683x1024.png\" alt=\"\" class=\"wp-image-4189 size-full not-transparent\" style=\"--dominant-color: #453d47; object-position:83% 65%\" srcset=\"https:\/\/www.lmiab.se\/app\/uploads\/2026\/09\/optik-hogeffekt-683x1024.png 683w, https:\/\/www.lmiab.se\/app\/uploads\/2026\/09\/optik-hogeffekt-200x300.png 200w, https:\/\/www.lmiab.se\/app\/uploads\/2026\/09\/optik-hogeffekt-768x1152.png 768w, https:\/\/www.lmiab.se\/app\/uploads\/2026\/09\/optik-hogeffekt.png 1024w\" sizes=\"auto, (max-width: 683px) 100vw, 683px\" \/><\/figure><\/div>\n\n\n\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-media-text is-stacked-on-mobile is-vertically-aligned-top is-image-fill-element\"><figure class=\"wp-block-media-text__media\"><img data-dominant-color=\"71707d\" data-has-transparency=\"false\" loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/www.lmiab.se\/app\/uploads\/2026\/09\/optics-cleaning2-1024x1024.png\" alt=\"\" class=\"wp-image-4191 size-full not-transparent\" style=\"--dominant-color: #71707d; object-position:50% 50%\" srcset=\"https:\/\/www.lmiab.se\/app\/uploads\/2026\/09\/optics-cleaning2-1024x1024.png 1024w, https:\/\/www.lmiab.se\/app\/uploads\/2026\/09\/optics-cleaning2-300x300.png 300w, https:\/\/www.lmiab.se\/app\/uploads\/2026\/09\/optics-cleaning2-150x150.png 150w, https:\/\/www.lmiab.se\/app\/uploads\/2026\/09\/optics-cleaning2-768x768.png 768w, https:\/\/www.lmiab.se\/app\/uploads\/2026\/09\/optics-cleaning2.png 1254w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure><div class=\"wp-block-media-text__content\">\n<h2 class=\"wp-block-heading has-palette-color-2-color has-text-color has-link-color wp-elements-b6133b36186d473b8e232a5a869a09e0\">Cleaning and Handling Laser Optics<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Laser optics should be handled as precision components.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Optical surfaces should not be touched with bare fingers, as grease and other contaminants may be deposited on the surface. Incorrect cleaning methods can also cause scratches or damage the coating.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The appropriate cleaning method depends on the component material, coating, type of contamination and the manufacturer&#8217;s instructions.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">As a general principle:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>minimise handling of optical surfaces<\/li>\n\n\n\n<li>work in a clean environment<\/li>\n\n\n\n<li>use suitable gloves and tools<\/li>\n\n\n\n<li>use cleaning materials intended for optical components<\/li>\n\n\n\n<li>inspect the component before and after cleaning<\/li>\n\n\n\n<li>follow the manufacturer&#8217;s instructions.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Optics showing permanent damage, severe contamination or damaged coatings should not automatically be reused simply because the component remains mechanically intact..<\/p>\n<\/div><\/div>\n\n\n\n<div style=\"height:10px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Common Signs of Problems with Laser Optics<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Degraded laser optics do not necessarily result in an immediate machine stop. Problems can develop gradually.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Signs that may indicate that the optical chain should be inspected include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>gradual deterioration in process results<\/li>\n\n\n\n<li>increased laser power required to achieve the same result<\/li>\n\n\n\n<li>changes or instability in focal position<\/li>\n\n\n\n<li>increasing temperature of optical components<\/li>\n\n\n\n<li>recurring problems with protective windows<\/li>\n\n\n\n<li>visible contamination or discolouration<\/li>\n\n\n\n<li>damage to coatings or optical surfaces<\/li>\n\n\n\n<li>changes in beam profile.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The same symptoms can, of course, have other causes. The optics should therefore be assessed as part of the complete laser system rather than in isolation.<\/p>\n\n\n\n<div class=\"wp-block-group alignfull has-palette-color-8-background-color has-background is-layout-constrained wp-block-group-is-layout-constrained\">\n<div style=\"height:10px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Selecting the Right Laser Optics Involves More Than Dimensions<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Two optical components can have the same diameter and thickness and appear almost identical while being designed for completely different laser systems.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">When identifying the correct laser optics, information may therefore be required about:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>laser type and laser source<\/li>\n\n\n\n<li>wavelength<\/li>\n\n\n\n<li>CW or pulsed operation<\/li>\n\n\n\n<li>laser power<\/li>\n\n\n\n<li>pulse energy and pulse duration<\/li>\n\n\n\n<li>optical material<\/li>\n\n\n\n<li>coating<\/li>\n\n\n\n<li>diameter and thickness<\/li>\n\n\n\n<li>focal length<\/li>\n\n\n\n<li>manufacturer and system model<\/li>\n\n\n\n<li>existing part number.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Using optics that are not designed for the relevant laser can result in reduced process performance and, in the worst case, damage to the optics or other components in the system.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Laser Optics as Part of the Complete Laser System<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Laser optics never operate in isolation.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Laser source \u2192 beam delivery \u2192 optics \u2192 scanner or processing head \u2192 workpiece \u2192 process<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Every part of the chain influences the final result.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A change in the beam characteristics of the laser source, a contaminated optical component, a damaged protective window or incorrect focus can affect the process even when every other part of the system is functioning correctly.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Troubleshooting should therefore not be limited to a single component.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">LMI AB works with <strong>laser systems, laser sources, laser heads, scanner systems, laser optics, components, spare parts, troubleshooting and service<\/strong>. This makes it possible to assess the optics as part of the complete laser system.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Our Laser Optics Areas<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Laser Optics for Fibre Lasers &amp; YAG<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Optical components for fibre lasers, Nd:YAG and related laser systems, including focusing lenses, collimating optics and other components matched to the relevant wavelengths and power levels.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Learn more about laser optics for fibre lasers &amp; YAG \u2192<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">CO\u2082 Laser Optics<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Optics for CO\u2082 laser systems, including ZnSe lenses, resonator optics, output couplers, beam delivery mirrors and other optical components for wavelengths around 10.6 \u00b5m.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Learn more about CO\u2082 laser optics \u2192<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Protective Windows for Laser Machines<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Replaceable protective windows designed to protect focusing optics and other sensitive components against contamination from the laser process.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Learn more about protective windows for laser machines \u2192<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<div style=\"height:10px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Can&#8217;t Find the Laser Optics You Need?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Not all types and variants of laser optics available from LMI AB are presented on the website.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If you are looking for a replacement component, please provide as much information as possible about the laser system and the existing optic. Part numbers, manufacturer, system model, drawings, technical data or clear photographs of markings and packaging can often make it considerably easier to identify the correct component.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">LMI AB can also assist when an older optical component needs to be replaced and the original part number is unknown or no longer available.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><a href=\"https:\/\/www.lmiab.se\/en\/contact\/\" data-type=\"page\" data-id=\"2249\">Contact LMI AB and we will help you find the right laser optics for your laser system and application<\/a><\/strong><\/p>\n\n\n\n<div class=\"wp-block-group alignfull is-layout-constrained wp-block-group-is-layout-constrained\" style=\"padding-top:var(--wp--preset--spacing--80);padding-bottom:var(--wp--preset--spacing--80)\">\n<h2 class=\"wp-block-heading has-text-align-left\">Frequently Asked Questions About Laser Optics<\/h2>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1787314650122\"><strong class=\"schema-faq-question\">Can the same laser optics be used for different laser wavelengths?<\/strong> <p class=\"schema-faq-answer\">Not necessarily. Both the optical material and coating must be suitable for the relevant wavelength. A component designed for around 1 \u00b5m is therefore not automatically suitable for a CO\u2082 laser at 10.6 \u00b5m or for a UV laser.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1787314664852\"><strong class=\"schema-faq-question\">Why is the coating so important?<\/strong> <p class=\"schema-faq-answer\">The coating determines, among other things, how much laser energy is transmitted or reflected at the relevant wavelength. An incorrect coating can result in greater optical losses, heating and, in some cases, damage to the component.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1787314680813\"><strong class=\"schema-faq-question\">What is the difference between a focusing lens and a collimating lens?<\/strong> <p class=\"schema-faq-answer\">Collimating optics are used to create a substantially parallel laser beam. The focusing optics then concentrate the beam towards the focal point where the laser process takes place.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1787732115847\"><strong class=\"schema-faq-question\">Why are protective windows used?<\/strong> <p class=\"schema-faq-answer\">Protective windows protect more expensive optical components against metal spatter, smoke, dust and other contamination from the process. They are normally easier and less expensive to replace than the optics behind them.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1787314690993\"><strong class=\"schema-faq-question\">Can a dirty protective window affect the laser process?<\/strong> <p class=\"schema-faq-answer\">Yes. Contamination can absorb laser energy and cause local heating. This can affect transmission, focus and process stability and, in severe cases, lead to damage to the optics.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1788346849092\"><strong class=\"schema-faq-question\">Why do optics become more critical at high laser powers?<\/strong> <p class=\"schema-faq-answer\">Even very small optical losses represent a greater amount of absorbed energy when the total laser power is high. Requirements for material, coating, surface quality, cleanliness and thermal management therefore increase with laser power.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1787314701813\"><strong class=\"schema-faq-question\">How do you identify the correct replacement optic?<\/strong> <p class=\"schema-faq-answer\">A part number and machine model are often the easiest starting points, but wavelength, power, material, coating, dimensions and focal length may also need to be established. Photographs of the component and its markings can also be very useful.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1789558745628\"><strong class=\"schema-faq-question\">Can LMI AB help with optics that are not listed on the website?<\/strong> <p class=\"schema-faq-answer\">Yes. The website does not show every optical component and variant that can be supplied. Contact LMI AB with information about the laser system and existing optics and we can help identify a suitable solution.<\/p> <\/div> <\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-group alignfull has-palette-color-8-background-color has-background is-layout-constrained wp-block-group-is-layout-constrained\">\n<div style=\"height:40px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-995f960e wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:33.33%\">\n<figure class=\"wp-block-image size-large\"><img data-dominant-color=\"6f6c70\" data-has-transparency=\"false\" style=\"--dominant-color: #6f6c70;\" loading=\"lazy\" decoding=\"async\" width=\"683\" height=\"1024\" sizes=\"auto, (max-width: 683px) 100vw, 683px\" src=\"https:\/\/www.lmiab.se\/app\/uploads\/2026\/02\/0d9aiq-683x1024.jpg\" alt=\"\" class=\"wp-image-1580 not-transparent\" srcset=\"https:\/\/www.lmiab.se\/app\/uploads\/2026\/02\/0d9aiq-683x1024.jpg 683w, https:\/\/www.lmiab.se\/app\/uploads\/2026\/02\/0d9aiq-200x300.jpg 200w, https:\/\/www.lmiab.se\/app\/uploads\/2026\/02\/0d9aiq.jpg 720w\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:66.66%\">\n<h2 class=\"wp-block-heading\">Contact LMI AB About Laser Optics<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Do you need to find the right optics for a new laser system, or would you like to know whether there are alternatives to the optics you are currently using?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Contact LMI AB with information about the application, machine, laser head or the optical component itself, and we will help you find the right solution. We stock most common sizes of protective windows, lenses and other optical components. If we do not have the required component in stock, we can usually source it quickly through our own supply channels.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">We can supply a wide range of laser optics for industrial laser systems, whether for <strong>fibre lasers, CO\u2082 lasers or other laser technologies<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Contact <strong>Malin Kristoffers<\/strong> for questions about laser optics.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Malin Kristoffers<\/h3>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-eed6e38a8d785c1d26f0402ace28b799 wp-block-paragraph\"><strong>Contactperson for laser optics<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"tel:+46(0)281-30715\">+46 (0)281-307 15<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"mailto:malin@lmiab.se\">malin@lmiab.se<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n<\/div>\n<\/div>\n\n\n\n<div style=\"height:40px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Laser optics for industrial laser systems. Learn about focusing and collimating optics, mirrors, protective windows, optical materials, coatings and how to select the correct optics for different laser types and processes.<\/p>\n","protected":false},"author":3,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-4173","page","type-page","status-publish","hentry"],"blocksy_meta":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Laser Optics \u2013 Technology, Materials &amp; Components | LMI AB<\/title>\n<meta name=\"description\" content=\"Learn about laser optics, focusing lenses, collimating optics, mirrors, protective windows and coatings for industrial laser systems.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.lmiab.se\/laseroptik-kunskap\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Laser Optics \u2013 Technology, Materials &amp; Components | LMI AB\" \/>\n<meta property=\"og:description\" content=\"Learn about laser optics, focusing lenses, collimating optics, mirrors, protective windows and coatings for industrial laser systems.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.lmiab.se\/laseroptik-kunskap\/\" \/>\n<meta property=\"og:site_name\" content=\"Laser Machining Inc. Lmi AB\" \/>\n<meta property=\"article:modified_time\" content=\"2026-09-17T08:47:49+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.lmiab.se\/app\/uploads\/2026\/09\/what-are-laseroptics-1024x1024.png\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"15 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":[\"WebPage\",\"FAQPage\"],\"@id\":\"https:\\\/\\\/www.lmiab.se\\\/laseroptik-kunskap\\\/\",\"url\":\"https:\\\/\\\/www.lmiab.se\\\/laseroptik-kunskap\\\/\",\"name\":\"Laser Optics \u2013 Technology, Materials & Components | LMI AB\",\"isPartOf\":{\"@id\":\"http:\\\/\\\/www.lmiab.se\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.lmiab.se\\\/laseroptik-kunskap\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.lmiab.se\\\/laseroptik-kunskap\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.lmiab.se\\\/app\\\/uploads\\\/2026\\\/09\\\/what-are-laseroptics-1024x1024.png\",\"datePublished\":\"2026-09-17T08:47:47+00:00\",\"dateModified\":\"2026-09-17T08:47:49+00:00\",\"description\":\"Learn about laser optics, focusing lenses, collimating optics, mirrors, protective windows and coatings for industrial laser systems.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.lmiab.se\\\/laseroptik-kunskap\\\/#breadcrumb\"},\"mainEntity\":[{\"@id\":\"https:\\\/\\\/www.lmiab.se\\\/laseroptik-kunskap\\\/#faq-question-1787314650122\"},{\"@id\":\"https:\\\/\\\/www.lmiab.se\\\/laseroptik-kunskap\\\/#faq-question-1787314664852\"},{\"@id\":\"https:\\\/\\\/www.lmiab.se\\\/laseroptik-kunskap\\\/#faq-question-1787314680813\"},{\"@id\":\"https:\\\/\\\/www.lmiab.se\\\/laseroptik-kunskap\\\/#faq-question-1787732115847\"},{\"@id\":\"https:\\\/\\\/www.lmiab.se\\\/laseroptik-kunskap\\\/#faq-question-1787314690993\"},{\"@id\":\"https:\\\/\\\/www.lmiab.se\\\/laseroptik-kunskap\\\/#faq-question-1788346849092\"},{\"@id\":\"https:\\\/\\\/www.lmiab.se\\\/laseroptik-kunskap\\\/#faq-question-1787314701813\"},{\"@id\":\"https:\\\/\\\/www.lmiab.se\\\/laseroptik-kunskap\\\/#faq-question-1789558745628\"}],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.lmiab.se\\\/laseroptik-kunskap\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.lmiab.se\\\/laseroptik-kunskap\\\/#primaryimage\",\"url\":\"https:\\\/\\\/www.lmiab.se\\\/app\\\/uploads\\\/2026\\\/09\\\/what-are-laseroptics-1024x1024.png\",\"contentUrl\":\"https:\\\/\\\/www.lmiab.se\\\/app\\\/uploads\\\/2026\\\/09\\\/what-are-laseroptics-1024x1024.png\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.lmiab.se\\\/laseroptik-kunskap\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.lmiab.se\\\/en\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Laser Optics\"}]},{\"@type\":\"WebSite\",\"@id\":\"http:\\\/\\\/www.lmiab.se\\\/#website\",\"url\":\"http:\\\/\\\/www.lmiab.se\\\/\",\"name\":\"Laser Machining Inc. 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Lmi AB"},"image":{"@id":"https:\/\/www.lmiab.se\/#\/schema\/logo\/image\/"}},{"@type":"Question","@id":"https:\/\/www.lmiab.se\/laseroptik-kunskap\/#faq-question-1787314650122","position":1,"url":"https:\/\/www.lmiab.se\/laseroptik-kunskap\/#faq-question-1787314650122","name":"Can the same laser optics be used for different laser wavelengths?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Not necessarily. Both the optical material and coating must be suitable for the relevant wavelength. 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An incorrect coating can result in greater optical losses, heating and, in some cases, damage to the component.","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/www.lmiab.se\/laseroptik-kunskap\/#faq-question-1787314680813","position":3,"url":"https:\/\/www.lmiab.se\/laseroptik-kunskap\/#faq-question-1787314680813","name":"What is the difference between a focusing lens and a collimating lens?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Collimating optics are used to create a substantially parallel laser beam. The focusing optics then concentrate the beam towards the focal point where the laser process takes place.","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/www.lmiab.se\/laseroptik-kunskap\/#faq-question-1787732115847","position":4,"url":"https:\/\/www.lmiab.se\/laseroptik-kunskap\/#faq-question-1787732115847","name":"Why are protective windows used?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Protective windows protect more expensive optical components against metal spatter, smoke, dust and other contamination from the process. They are normally easier and less expensive to replace than the optics behind them.","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/www.lmiab.se\/laseroptik-kunskap\/#faq-question-1787314690993","position":5,"url":"https:\/\/www.lmiab.se\/laseroptik-kunskap\/#faq-question-1787314690993","name":"Can a dirty protective window affect the laser process?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Yes. Contamination can absorb laser energy and cause local heating. This can affect transmission, focus and process stability and, in severe cases, lead to damage to the optics.","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/www.lmiab.se\/laseroptik-kunskap\/#faq-question-1788346849092","position":6,"url":"https:\/\/www.lmiab.se\/laseroptik-kunskap\/#faq-question-1788346849092","name":"Why do optics become more critical at high laser powers?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Even very small optical losses represent a greater amount of absorbed energy when the total laser power is high. Requirements for material, coating, surface quality, cleanliness and thermal management therefore increase with laser power.","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/www.lmiab.se\/laseroptik-kunskap\/#faq-question-1787314701813","position":7,"url":"https:\/\/www.lmiab.se\/laseroptik-kunskap\/#faq-question-1787314701813","name":"How do you identify the correct replacement optic?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"A part number and machine model are often the easiest starting points, but wavelength, power, material, coating, dimensions and focal length may also need to be established. Photographs of the component and its markings can also be very useful.","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/www.lmiab.se\/laseroptik-kunskap\/#faq-question-1789558745628","position":8,"url":"https:\/\/www.lmiab.se\/laseroptik-kunskap\/#faq-question-1789558745628","name":"Can LMI AB help with optics that are not listed on the website?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Yes. The website does not show every optical component and variant that can be supplied. Contact LMI AB with information about the laser system and existing optics and we can help identify a suitable solution.","inLanguage":"en-US"},"inLanguage":"en-US"}]}},"_links":{"self":[{"href":"https:\/\/www.lmiab.se\/en\/wp-json\/wp\/v2\/pages\/4173","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.lmiab.se\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.lmiab.se\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.lmiab.se\/en\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lmiab.se\/en\/wp-json\/wp\/v2\/comments?post=4173"}],"version-history":[{"count":20,"href":"https:\/\/www.lmiab.se\/en\/wp-json\/wp\/v2\/pages\/4173\/revisions"}],"predecessor-version":[{"id":4247,"href":"https:\/\/www.lmiab.se\/en\/wp-json\/wp\/v2\/pages\/4173\/revisions\/4247"}],"wp:attachment":[{"href":"https:\/\/www.lmiab.se\/en\/wp-json\/wp\/v2\/media?parent=4173"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}