Schott BaF N6, 365nm - 2325nm
USER
2 1
SQRT(1+B1*wvl^2/(wvl^2-C1)+B2*wvl^2/(wvl^2-C2)+B3*wvl^2/(wvl^2-C3))
0
B1	1.36719201E+00;
B2	1.09079940E-01;
B3	1.02108011E+00;
C1	8.82820704E-03;
C2	4.38731646E-02;
C3	1.13586020E+02;