Schott BaSF 54, 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	1.64803910E+00;
B2	2.66170161E-01;
B3	1.15420131E+00;
C1	1.11759917E-02;
C2	5.33321565E-02;
C3	1.19495098E+02;