Schott KzFS N5, 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	1.47727858E+00;
B2	1.91686941E-01;
B3	8.97333608E-01;
C1	9.75488335E-03;
C2	4.50495404E-02;
C3	6.78786495E+01;