Hellma Materials BaF2 features an excellent transmittance in the VIS and IR spectral ranges up to 12µm.
This allows the usage of BaF2 as broadband optical material in the VIS and IR dual-channel systems for visible and thermal imaging.
BaF2 has a lower refractive index than many other optical materials. This reduces transmission losses caused by Fresnel-reflection.

Hellma Materials Barium Fluoride is the material of choice for wide bandwidth applications covering the VIS, near-IR and mid-IR range. It is an optical crystal grown from highly purified synthetic raw material and features a superior internal transmittance (T > 99% @7μm) enabling advanced applications in thermal imaging, night vision and surveillance imaging using integrated VIS and IR detector channels. Low spectral dispersion makes BaF2 the preferred optical material for aberration and color correction.