We are offering znse ir lens. Zinc selenide focus lens are widely used in co2 laser process, including cutting, drilling, carving & other laser system. With the imported material, our products can withstand high power density; and the film is solid, with which the lens are resistant to wipe. Because of the double-side film, the filterability of the light (the wavelength is 10.6m) can reach 99%.Details of large convex lens:1.material:znse, ge, si, 2.dia.5- 500mm3.surace quality:40204.flatness;14lambda (general standard)5.ca:85%6.tol.:+-0.1(general standard)7.coating:ar coating8.focal tol.:+-1%9.centeration:30arc minitues