BBAR High Efficiency Graph
Infrared Broadband AR Coatings
RPO also offers completed Germanium optics including robust infrared antireflective coatings used in thermal imaging and sensing applications. These coatings use no radioactive materials, are designed to moderate abrasion requirements, and exhibit high transmission in the long wave infrared region.
The coating design can be modified to meet transmission or reflection requirements in the 7 to 14 micron wavelength range. Use of ion beam assist during thin film deposition achieves a relatively low stress, adherent, high efficiency antireflective coating.
BBAR High Efficiency 8-12 µ Germanium
> 98% Average Transmission,
Reflection average < 0.5%
DLC/BBAR High Durability Graph
Infrared Broadband and DLC AR Coatings for Durability
For harsh environmental applications, a diamondlike carbon (DLC) coating on the exterior surface of the germanium, coupled with a high efficiency AR coating on the opposite side provide both a protective and the highest transmission available. The DLC coating meets not only severe abrasion test requirements, but also various wiper, sand, sun and rain tests. These infrared coatings have been qualified for military platforms on the ground, in the air, and at sea.
DLC/BBAR High Durability 8-12 µ Germanium
> 91% Average Transmission, R average < 2% for DLC ,
R average < 0.5% for BBAR. |