Schott BaF N11, 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	1.60255217E+00;
B2	1.16918887E-01;
B3	1.02861126E+00;
C1	9.38812347E-03;
C2	4.40475344E-02;
C3	1.04533133E+02;