MgF2(Magnesium Fluoride)
MgF2 (Magnesium Fluoride) transmits over a extremely wide range of wavelengths. Windows, lenses and prisms made of MgF2 can be used over the entire range of wavelengths from 0.12μm(vacuum ultraviolet ) to 8.0μm (infrared). High quality synthetic VUV grade MgF2 is quite expensive.
Product Description
Low grade MgF2 is sometimes used in the infrared but it is inferior to CaF2. MgF2 is tough and works and polishes well, but it is slightly birefringent and should be cut with the optic axis perpendicular to the plane of the window or lens.
Highly recommended MgF2 Optics from Yutai Optics:
MgF2 lenses,
MgF2 windows,
MgF2 domes,
MgF2 prisms.