Schott LaF N8, 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	1.75346053E+00;
B2	1.79853972E-01;
B3	1.03072863E+00;
C1	1.02514872E-02;
C2	4.66225111E-02;
C3	8.61010298E+01;