Schott F 5, 334nm - 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	1.31044630E+00;
B2	1.96034260E-01;
B3	9.66129770E-01;
C1	9.58633048E-03;
C2	4.57627627E-02;
C3	1.15011883E+02;