Schott SF L6, 405nm - 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	1.78922056E+00;
B2	3.28427448E-01;
B3	2.01639441E+00;
C1	1.35163537E-02;
C2	6.22729599E-02;
C3	1.68014713E+02;