Plano-plano window is coated AR coating in both sides. The substrate of the window is normally JGS1 or Fused Silica(FS). The protective window which will be used at laser cutting head to protect the focusing lens in case of damage. We can provide any wavelength antireflection coating according to customer demand. Other wavelengths, diameter, thickness and coating, we can also be customized according to customer requirements. Standard High Efficiency Low Loss Anti-reflectance Thin Film Coating Applied to Both Sides Long life time Total Absorption < 30PPM, Transmission : > 99.5% Every window is packaged individually .
eBay