Schott BaSF 13, 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	1.61151995E+00;
B2	1.92652792E-01;
B3	1.09087467E+00;
C1	1.00754928E-02;
C2	5.00718641E-02;
C3	1.10402848E+02;