IR coatings at here mean coatings for infrared region in 2.5μm(2500nm)-16μm. There is a big difference in selection of materials and fabrication techniques between IR coatings and near infrared coatings. They are mainly used in industrial and medical laser equipments such as CO2 laser, Er:YAG laser, CO and HF lasers.

High energy CO2 laser coatings (10.6μm)  

①

ZnSe/GaAs lens 

AR R<0.2%

note: Ge use low energy laser

②

ZnSe/GaAs Windows

PR/HT 20%-98%/T>99%

note: Ge use low energy laser

③

Si/Cu substrate total Reflectors

Enhenced Au/Ag Reflectors

R>99.5%

Er:YAG Coatings (2.94μm)

①

CaF2/Sapphire Crystal lens

AR/AR R<0.2%

②

CaF2/Sapphire Crystal Windows

PR/AR 20%-98%/R<0.2% 

③

BK7/CaF2/Sapphire Substrate mirror

HR R>99%

Infrared Imaging system

①

Silicon Lens：AR/AR  T>98% 3.5-5μm

T>60% 7.5-11.5μm

note: Oxide Free Si has high absorbtion in 7.5-11.5μm, but the materials is very cheap, so it can use Infrared Imaging System instead of Ge/ZnS/ZnSe materials. 

②

MgF2 Windows

AR/AR 3.5-4.8μm T>95%

③

ZnSe/ZnS/Ge Substrate Lens：AR/AR 

T>98% 3.5-5.5μm

T>97% 7.5-11.5μm

 Other wavelengths, Incident anglesand and dimensions available upon request