... cutting, drilling, sculpture, engraving etc and laser systems. To meet the market’s need, we ... of double-side antireflective coating film(10.6μm )≥99%. Specification Of Lens Base material (Domestic ... & foreign) Wavelength (μm) Focal length (mm) Diameter (mm) Surface ... 5 20 Plano-convex crescent Base material Wavelength(μm) Focal length(Inch) diameter(Inch) surface ZnSe ...