Schott LaK 10, 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	1.67482975E+00;
B2	2.22668828E-01;
B3	1.13956536E+00;
C1	8.49324758E-03;
C2	3.30463141E-02;
C3	8.04372553E+01;