BaF2 Lenses is similar to Calcium Fluoride in it’s properties and is used for optical windows, lenses, and prisms, particularly when transmission into the ultraviolet is desired. The transmission range is from 0.2m m to 11m m. Transmission in the VUV is degraded by prolonged exposure to a moist atmosphere, but it is not significantly degraded by exposure to high energy radiation.
BaF2 Lenses is less resistant to attack by water than Calcium Fluoride but attack does not begin until 5000C. In the dry atmosphere Calcium Fluoride can be used up to 8000C. BaF2 Lenses is the most resistant fluoride to high energy radiation but does not have the VUV transmission of other types. The material is very sensitive to thermal shock.
This article comes from dmphotonics edit released