Schott KzF N2, 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	1.12337304E+00;
B2	1.77617693E-01;
B3	8.49213044E-01;
C1	7.12846561E-03;
C2	3.17291201E-02;
C3	8.49656713E+01;