{"product_id":"cloudray-co2-laser-focusing-lens-20mm-diameter-76-2mm-fl-meniscus-znse-high-transmittance","title":"Cloudray CO2 Laser Focusing Lens 20mm Diameter – 76.2mm FL Meniscus ZnSe, High Transmittance","description":"\u003cp\u003e\u003cstrong\u003eThe Cloudray D20mm FL76.2mm CO2 laser lens is a 20 mm diameter meniscus ZnSe focusing optic with a 76.2 mm focal length, designed for CO2 engraving and cutting systems from 40W to 200W.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis precision lens is manufactured from high-quality CVD ZnSe and finished with a durable double-sided solid coating to deliver excellent infrared transmittance, reliable focus, and long service life. It’s a direct replacement or upgrade part for CO2 laser heads where a 20 mm clear aperture and 76.2 mm focal length are required, and it ships as a single lens ready for installation into standard mounts.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this lens affect cutting and engraving performance?\u003c\/h3\u003e\n\u003cp\u003eThe 76.2 mm focal length concentrates the 10.6 µm CO2 beam to a precise spot suitable for both fine engraving and moderate cutting. The meniscus profile reduces aberrations and helps maintain a tighter focal spot across the working distance.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFocal length: 76.2 mm (3\") for balanced depth of field and spot size.\u003c\/li\u003e\n  \u003cli\u003e20 mm diameter aperture for focused beam delivery.\u003c\/li\u003e\n  \u003cli\u003eMeniscus shape minimizes spherical aberration for cleaner edges.\u003c\/li\u003e\n  \u003cli\u003eHigh transmittance (≥99.5%) preserves laser power throughput.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this lens work with my CO2 laser system?\u003c\/h3\u003e\n\u003cp\u003eThis lens is compatible with CO2 laser systems rated between 40W and 200W, provided the laser head accepts a 20 mm diameter optic and the mount accommodates a 76.2 mm focal working distance. Verify mechanical mount dimensions and clearance before installation.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMaterial: CVD ZnSe—suitable for 10.6 µm CO2 wavelengths.\u003c\/li\u003e\n  \u003cli\u003eThickness: 2 mm—fits common lens holders designed for thin optics.\u003c\/li\u003e\n  \u003cli\u003eCoating: double-sided solid coating for wipe resistance during maintenance.\u003c\/li\u003e\n  \u003cli\u003ePackage: single lens included, ready to install.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow should I clean and maintain the Cloudray lens?\u003c\/h3\u003e\n\u003cp\u003eUse gentle, non-abrasive cleaning methods to avoid scratching the coating and ZnSe substrate. The lens features a robust coating that tolerates careful wiping, but aggressive chemicals and rough materials will degrade performance.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eUse lens tissue or a microfibre cloth with optical-grade cleaner.\u003c\/li\u003e\n  \u003cli\u003eBlow off loose dust with filtered compressed air before wiping.\u003c\/li\u003e\n  \u003cli\u003eAvoid alcohol-heavy or abrasive solutions that damage coatings.\u003c\/li\u003e\n  \u003cli\u003eInspect regularly for carbonization or debris after cutting tasks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the optical and physical specifications I should note?\u003c\/h3\u003e\n\u003cp\u003eKey specs help you match the lens to your application and mounting hardware. These values also determine compatible focal setups and expected throughput for efficient laser processing.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDiameter: 20 mm (0.71\").\u003c\/li\u003e\n  \u003cli\u003eFocal length: 76.2 mm (3\").\u003c\/li\u003e\n  \u003cli\u003eThickness: 2 mm (0.07\").\u003c\/li\u003e\n  \u003cli\u003eTransmittance: ≥99.5% and double-sided solid coating.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? The Cloudray D20mm FL76.2mm lens is aimed at makers, fabrication shops, and equipment technicians who need a reliable CO2 focusing optic for mid-powered laser cutters and engravers. It’s appropriate for users replacing worn optics, optimizing beam focus for fine engraving, or configuring systems that require a 20 mm ZnSe lens with a 76.2 mm focal length. Confirm system compatibility and handle with care to preserve coating performance and optical clarity.\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: Is this lens compatible with 10.6 µm CO2 lasers?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. Made from CVD ZnSe and coated for 10.6 µm, it suits CO2 lasers between 40W and 200W.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How do I clean the Cloudray lens safely?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Blow off dust, then gently wipe with lens tissue and an optical-grade cleaner; avoid abrasive materials.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Cloudray","offers":[{"title":"Default Title","offer_id":55297553858897,"sku":"B07B8KYDHY","price":55.36,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1086\/5567\/3681\/files\/cloudray-front-view-lens-packaging_4fb90462-7d33-4c3f-b9e7-2a0848670797.jpg?v=1791957605","url":"https:\/\/craftiche.co.uk\/products\/cloudray-co2-laser-focusing-lens-20mm-diameter-76-2mm-fl-meniscus-znse-high-transmittance","provider":"Craftiche","version":"1.0","type":"link"}