Schott LaF N24, 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	1.70960358E+00;
B2	3.08712672E-01;
B3	1.24764001E+00;
C1	8.36251592E-03;
C2	3.24824713E-02;
C3	8.48077463E+01;