Schott LaF N10, 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	1.87199658E+00;
B2	2.32399212E-01;
B3	1.29453872E+00;
C1	9.67115690E-03;
C2	4.06265981E-02;
C3	8.71629425E+01;