Hellma products

Hellma Materials CaF₂ has been utilized as an optical key material in microlithography for semiconductor production for many years. CaF₂ is established as an industry standard material for excimer laser optics in projection and illumination optics. The unique optical properties of CaF₂ enable a variety of advanced applications.

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.