ALKOR Technologies - your CRYSTAL optics supplier.   ALKOR Technologies - your CRYSTAL optics supplier.
ALKOR Technologies - your CRYSTAL optics supplier.
Materials>>CaF2 >>CaF2 transmission

How to choose most suitable CaF2 grade for my application?

Alkor Technologies manufactures custom Calcium Fluoride optical components for Ultraviolet and Infrared applications. Please refer to a table to check which grade is suitable for your application.

λ, micron Spectral transmittance coefficient τ (λ), %, not less
Excimer CaF2 VUV CaF2 UV CaF2 IR CaF2
0.125 50 - - -
0.130 65 55 - -
0.155 79 70 - -
0.193 85 80 80 70
0.260 87 87 87 85
0.4 90 90 90 90
3.0 94
6.5 94
7.0 92
8.0 80

"-" means τ (λ) <50%

Excimer grade CaF2 is most expensive; IR grade is very cheap and most popular CaF2 grade for large number of IR applications.