Thin Film Coating

Thin Film Coating

RPO’s production coaters and spectrophotometers for coating metrology allow us to provide standard and custom coatings, offering greater performance for reflective and transmissive requirements. High efficiency coating experience from 150nm--14um, from standard MgF2 AR’s and Multi-Layer Broadbands to custom coatings, RPO offers exceptional optical coating solutions. With design and optimization, coating process development, optical and non-optical materials research, and coating production, RPO's vertically integrated coating solutions ensure added performance & durability for the most extreme optical applications.

Infrared Broadband High Efficiency Antireflection (HEAR) Coatings

RPO offers optics including robust infrared High Efficiency Antireflection (HEAR) 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 (HEAR).

Germanium HEAR, 8-12µm
> 98% Average Transmission, <0.5% Average Reflection

IG6/IRG26/Classic-6 Chalcogenide HEAR, 8-12µm
>98% Average Transmission, <0.5% Average Reflection

Infrared Broadband Diamond-Like Coatings (DLC)

For harsh environmental applications, a Diamond-Like Coating (DLC) on the exterior surface of the germanium, coupled with a high efficiency AR coating on the opposite side provides both protection 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 optical coatings have been qualified for military platforms on the ground, in the air, and at sea.

Germanium DLC, 8-12µm
> 91% Average Transmission, <1% Average Reflection

IG6/IRG26/Classic-6 Chalcogenide DLC, 8-12µm
>89% Average Transmission, <1% Average Reflection