Schott F 8, 334nm - 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	1.31172466E+00;
B2	1.72480274E-01;
B3	8.40159209E-01;
C1	9.65177918E-03;
C2	4.61712161E-02;
C3	1.00046795E+02;