Single Layer MgF2 Coatings

The index of refraction of magnesium fluoride is nearly ideal for the task of providing minimum reflectance with only a single layer film. When applied at high temperatures, MgF2 becomes a hard, durable coating that meets all standard MIL requirements. It exhibits broadband characteristics and can be applied on a variety of substrates for use in spectral regions from the UV to the NIR. MgF2 has the best performance:cost ratio of any antireflection coating.

Reflectivity (per surface)

-1.3% for mid-visible on BK7 
2.00% max on BK7 
2.25% max on SiO2

Practical Bandwidth

~300 nm

Wavelength Range

200 nm to 1500 nm


Fused Quartz/Fused Silica (all grades) 
Any Optical Glass 
Other materials upon request


Per MIL-C-48497A

Order As


Please Specify

Substrate Material/Part Number 
Surface(s) to be coated 
Wavelength Range 
Angle of incidence

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