Cloudray CO2 Laser Focus Lens 15mm Diameter FL50.8mm CVD ZnSe for 40W–200W – High Transmittance, Coated

This precision lens is engineered from high-quality CVD zinc selenide and finished with a robust double-sided coating for reliable optical performance in CO2 laser systems. Sized for compact beam delivery, the 15mm diameter and 50.8mm focal length make it a common replacement or upgrade part for hobbyist and industrial laser cutters and engravers. With ≥99.5% transmittance and wiping-resistant surfaces, the lens balances efficiency and durability in everyday workshop use.

What physical specifications define this Cloudray CO2 focus lens?

The lens is a meniscus-shaped CVD ZnSe optic with a 15mm diameter and a 50.8mm (2") focal length. It measures approximately 2mm thick and is optimised for CO2 wavelengths, offering very high light transmission to maintain beam energy through the focusing element.

• Material: high-quality CVD zinc selenide (ZnSe)
• Diameter: 15mm (0.59")
• Focal length: 50.8mm (2")
• Thickness: ~2mm (0.07")
• Shape: meniscus lens with ≥99.5% transmittance

How does this lens affect engraving and cutting performance?

By concentrating the CO2 beam to a precise spot, the lens improves cut resolution and engraving detail while keeping energy loss to a minimum. Its high transmittance and optical figure help maintain consistent focal spot size across jobs, which translates to cleaner cuts and finer engraved lines when aligned correctly.

• Creates a tight focal spot for sharper engraving detail
• Maximizes transmitted laser power for efficient cutting
• Stable optical performance across repetitive runs

Is this Cloudray lens compatible with my laser machine?

The lens is intended for CO2 systems rated from approximately 40W up to 200W, a common range for many desktop and mid-size industrial cutters. Compatibility also depends on the machine’s lens mount diameter and beam path; measure your existing lens seat and confirm a 15mm optic fits your holder and beam diameter before ordering.

• Rated compatible power: 40W–200W
• Check lens mount for 15mm diameter acceptance
• Confirm focal length suits your machine’s nozzle or head spacing

What care and handling will keep this lens performing longer?

The lens features a double-sided solid coating that resists wiping and helps protect the optical surface during routine maintenance. Handle the optic by its edges, avoid direct contact with the coated surfaces, and clean only with approved lens wipes or alcohol on lint-free tissue to prevent scratches and contamination.

• Store in a clean, dry case when not installed
• Use lint-free wipes and isopropyl alcohol for cleaning
• Replace if coating damage or deep scratches are present

Who is this lens for? Technicians, makers, and small manufacturing operators who run CO2 laser engraving and cutting machines and need a reliable, high-transmittance focusing optic will find this Cloudray 15mm, FL50.8mm CVD ZnSe lens useful. It suits users replacing worn optics, upgrading beam quality, or stocking spare parts for 40W–200W systems. The lens is ideal when you require a compact diameter optic with strong coating resilience for frequent use.