Schott BaSF 1, 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	1.40045640E+00;
B2	1.76868590E-01;
B3	9.24677441E-01;
C1	9.89899663E-03;
C2	4.74295359E-02;
C3	1.15946483E+02;