CO2 Laser Lens 50.80mm (2 inch) Focal Length

The lens is the final component that the laser beam will pass until it hits the surface of the workpiece. This lens has a focal length of 50.80mm or 2 inches. The diameter of the lens is 20mm. Make sure to get/make the correct nozzle that has a 20mm seat for the lens. The material of the lens is CVD ZnSe (Chemical Vapor Deposited Zinc Selenide) which has a low absorption rate and high transmittance level. Specifications: Design Wavelength: 10.6 um Focal Length Tolerance: ±1% Diameter Tolerance: +0.0 / -0.12 mm Thickness Tolerance: ±0.2 mm Surface Accuracy: /2 per 1" Dia@632.8nm Surface Quality: 20-10 scratch and dig Centration: <3' arc minutes Clear aperture: >90% Beveling: <0.2 x 45° AR/AR Coating: R<0.5% per surface @10.6um