II-VI (Coherent) is a leading brand in the laser lens industry. We sell genuine II-VI laser lenses. These lenses are made by II-VI’s factories in Suzhou, China. They uses premium CVD Znse and are ground, polished, coated, etc. 15 kinds Craftsmanship, focusing is very good, suitable for all CO2 laser engravers and cutters. Size/Shape38.1mm (1.5 in)50.8mm (2 in)63.5mm (2.5 in)76.2mm (3 in)101.6mm(4 in)19.05mmPlano convexPlano convexPlano convexPlano convexPlano convex20mmPlano convexMeniscusMeniscusMeniscusMeniscus Plano convex Vs. Meniscus Lens Lens TypesImageFeaturesPlano convex 1. One flat surface and one convex surface.2. More suitable for high turnover cutting applications, and when the cost is more important than the level of accuracy.3. When cutting thick materials, a Plano-convex lens provides a greater cut width.4. It is more popular in American and Chinese machinery.Meniscus 1. One concave surface and one convex surface.2. Creates a smaller beam diameter, reducing the spherical aberration and beam waste when precision cutting or marking.3. Provides a smaller spot size with increased power density at the work piece.4. It usually used by European customers and machine manufacturers (OEM's).5. Meniscus lenses are more expensive than Plano-Convex lenses. Specifications: Brand: II-VI ZnSe MEN Lens Wavelength: 10.6 um (10600 nm) Laser Power: 60W – 300W Diameter: 19.05/20mm Diameter Tolerance:±0.1mm Focal Length: 38.1/50.8/63.5/76.2mm Transmittance: 99.5% Clear aperture (polished): >90% AR coating reflectivity: <0.3% Warranty: 1 Year
