Cloudray 12mm CVD ZnSe CO2 Laser Focus Lens FL50.8mm — 40W–200W, ≥99.5% Transmittance

Cloudray's 12mm CVD ZnSe CO2 laser focus lens (FL50.8mm) is a precision meniscus lens designed for CO2 engraving and cutting machines rated 40W–200W.

This single-element focus lens is built from high-quality CVD zinc selenide and finished with a durable double-sided coating to deliver strong transmittance and long service life in CO2 laser systems. It replaces worn optics or upgrades an existing beam path to restore cutting and engraving performance on compatible 10.6 µm CO2 lasers. The compact 12mm diameter and 50.8mm focal length suit many hobbyist and light-industrial laser cutters.

How does this lens affect engraving and cutting precision?

The 50.8mm focal length concentrates the laser beam to a tight spot for finer detail and cleaner edges during engraving or cutting. Because the lens is a meniscus design with a transmittance of ≥99.5%, energy loss is minimal, preserving laser power at the work surface.

• Focal length: 50.8mm for a balance of detail and kerf control
• Diameter: 12mm fits common focus holders and nozzles
• High transmittance (≥99.5%) conserves available laser output
• Meniscus shape reduces spherical aberration for sharper focal spots

Is this lens compatible with my CO2 laser machine?

This Cloudray lens is intended for CO2 lasers with optical powers roughly between 40W and 200W and standard 10.6 µm wavelengths. Confirm mechanical fit (12mm diameter) and required focal length (FL50.8mm) before purchase, and ensure your beam housing accepts a single-element ZnSe lens.

• Material: CVD ZnSe optimised for 10.6 µm CO2 lasers
• Power compatibility: recommended for 40W–200W systems
• Physical size: 12mm diameter, 2mm thickness
• Mounting: fits most standard focus holders designed for 12mm optics

What durability and coating benefits does the Cloudray lens provide?

The lens features a double-sided solid coating applied through an industrial process to resist scratches and maintain optical clarity over time. This wiping-resistant surface simplifies routine cleaning and helps extend the working life of the optic under normal use.

• Coating: double-sided, solid coating for durability
• Wiping resistance: easier maintenance with reduced abrasion risk
• Long working life: coating and CVD ZnSe construction improve longevity
• Package: single lens per order for straightforward replacement

How do I install and maintain the focus lens safely?

Handle the ZnSe lens with gloves or lint-free tweezers to avoid fingerprints and scratches. Install it in a clean, dust-free housing, align per your machine’s manual, and clean only with recommended lens cleaning solutions and lint-free wipes.

• Use gloves or tweezers to prevent surface contamination
• Clean gently with lens-grade fluid and lint-free tissue
• Verify alignment in small test cuts before full production runs
• Store in its protective case when not installed

Who is this lens for? The Cloudray 12mm CVD ZnSe FL50.8mm lens is aimed at hobbyists, makers, and light-industrial operators who need a reliable, high-transmittance CO2 focus optic for 40W–200W laser cutters and engravers. It’s a suitable replacement part for restoring beam quality or upgrading optics to achieve finer cuts and engravings. If you require a different diameter or focal length, check Cloudray’s range of CO2 optics to match your machine’s specifications.