Znse Focus Lens Dia.20mm Fl 63.5mm 2.5'' For CO2 Laser Cutting Engraving Machine

High Quality Material Make Sure the Steady of Laser System. The CO2 Laser Transmittance of Lens can is more than 99.5% with Excellent Transparency. Excellent High-Power Density Endurance. Firm Surface Membrane. High Durability and Great Scratch Resistance.

Focusing Spot Size more Smaller. • Wavelength: 10.6 um • Diameter: 20 mm • Material: ZnSe • Focal length: 2.5"(63.5 mm) • Diameter tolerance: +0/-0.1 mm • Focal length tolerance: ± 2% • Transmittance: 99.5% • Clear aperture (polished) > 90% • AR coating reflectivity < 0.3% • Scratch-dig: 20 - 10 Note: In general, a laser machine needs 1 pies of focusing lens and 3 reflective mirrors. Focus Lens x 1pcs