Schott BaSF 10, 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	1.47552633E+00;
B2	1.77120646E-01;
B3	9.42502177E-01;
C1	1.01493287E-02;
C2	4.77578380E-02;
C3	1.18726332E+02;