BFI Optilas can provide MWIR coating for complex shapes like the inside of a domes and steep radius lenses.
This includes robust, broadband anti-reflection (BBAR) coatings for the 3-5um spectral range along with extremely high temperature operation and survivability.
PPC's IBS technique solves variable-thickness requirements by using shadow masking to control coating uniformity.
Coupled with a sophisticated 3D model, BFI can deterministically predict the proper mask shape for most applications.
Results on a Navair contract have demonstrated proper spectral transmission (coating thickness profile) for the dome and operational survivability to 1000C.
Other examples of MWIR IBS coatings done at PPC include narrowband AR coatings at 3.4um and short-wave pass dichroic mirrors with high reflectance at 3.1um and high transmittance at 1.5um.
