{"product_id":"cloudray-co2-laser-gold-si-reflective-mirrors-25mm-3-pack-99-2-ir-reflectivity-3mm-thick","title":"Cloudray CO2 Laser Gold Si Reflective Mirrors 25mm (3-Pack) — 99.2% IR Reflectivity, 3mm Thick","description":"\u003cstrong\u003eCloudray 3 Pcs Laser Si Reflective Lens Gold Mirror 25mm are precision gold-plated CO2 laser mirrors designed to replace or upgrade the three-mirror optical path in engraving and cutting systems.\u003c\/strong\u003e\n\n\u003cp\u003eThese three plane-shaped silicon (Si) mirrors measure 25 mm in diameter and 3 mm thick, with a gold reflective coating optimised for the 10,600 nm CO2 laser band. Built for hobbyist machines like the K40 and for industrial CO2 systems up to several hundred watts, this set focuses on delivering stable beam steering, high reflectivity, and durable thermal behavior. Each mirror is finished with precision slicing, polishing and coating to reduce scatter and maximize lifespan under continuous use.\u003c\/p\u003e\n\n\u003ch3\u003eHow do these mirrors affect beam performance in a CO2 laser system?\u003c\/h3\u003e\n\u003cp\u003eReplacing worn or lower-quality mirrors with these Cloudray gold Si mirrors reduces power loss along the optical path and preserves beam quality. The high IR reflectivity keeps more energy reaching the focusing lens and workpiece, which translates to more consistent cutting and engraving results.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eNominal diameter: 25 mm (0.98 in) and thickness: 3 mm (0.12 in).\u003c\/li\u003e\n  \u003cli\u003eReflectivity over 99.2% at 10,600 nm to minimize transmission losses.\u003c\/li\u003e\n  \u003cli\u003ePlane surface geometry for stable alignment and predictable beam steering.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAre these mirrors compatible with my machine and laser power?\u003c\/h3\u003e\n\u003cp\u003eYes—the mirrors are intended to work across a broad range of CO2 laser systems, from hobbyist K40 setups to larger engraving and cutting machines. Their coating and substrate handle typical operating temperatures for systems rated roughly 60W to 400W, but alignment and cooling practices still matter for high-power installations.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eWorks with K40 upgrades, desktop engravers, and many 60W–400W industrial CO2 lasers.\u003c\/li\u003e\n  \u003cli\u003eGold coating offers good thermal resistance for continuous operation.\u003c\/li\u003e\n  \u003cli\u003eCheck mirror mount size and beam diameter for fit before installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat maintenance or handling steps help these mirrors last longer?\u003c\/h3\u003e\n\u003cp\u003eProper handling and occasional cleaning extend mirror lifetime and keep reflectivity high. Always handle by the edges, avoid touching coated faces, and clean with appropriate lens tissue and solvent when needed; avoid abrasive materials or excessive pressure.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHandle edges only; use lint-free gloves or tweezers to avoid fingerprints.\u003c\/li\u003e\n  \u003cli\u003eClean with optical-grade solvent and soft lens tissue if contaminants appear.\u003c\/li\u003e\n  \u003cli\u003eEnsure mirror mounts are secure and aligned to prevent vibration damage.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: These Cloudray 25 mm gold-plated Si mirrors are aimed at DIYers upgrading K40-style machines, small-shop laser operators needing reliable replacements, and production users seeking consistent optical components for medium-power CO2 systems. They are suitable when you need a compact, high-reflectivity mirror set to restore or improve beam efficiency, provided your mounts accommodate 25 mm optics and your system follows standard cooling and alignment practices.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will these mirrors fit my K40 laser?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, they are sized for common K40 upgrades (25 mm diameter); confirm your mount clearance before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What reflectivity do the mirrors provide at CO2 wavelengths?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Cloudray mirrors offer over 99.2% reflectivity at the 10,600 nm CO2 wavelength to reduce power loss.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Cloudray","offers":[{"title":"Default Title","offer_id":55296660603217,"sku":"B07B915RV7","price":58.94,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1086\/5567\/3681\/files\/cloudray-front-packaging-25mm-gold-mirrors.jpg?v=1791944794","url":"https:\/\/craftiche.co.uk\/products\/cloudray-co2-laser-gold-si-reflective-mirrors-25mm-3-pack-99-2-ir-reflectivity-3mm-thick","provider":"Craftiche","version":"1.0","type":"link"}