Schott BaF N10, 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	1.60477289E+00;
B2	1.23762468E-01;
B3	1.07270520E+00;
C1	9.47021617E-03;
C2	4.51639792E-02;
C3	1.08539427E+02;