IR coatings means coatings for infrared region usually in 2.5μm(2500nm)-16μm. Different coating materials will show different unique performances. Usually CPG use her own Ge, ZnS coating materials, but CPG also import the special ones from the world.
1.High energy CO2 laser coatings (10.6μm)
2.High performance ZnSe broadband AR coatings