Schott LF 8, 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	1.26627830E+00;
B2	1.30098033E-01;
B3	8.67351579E-01;
C1	9.15809921E-03;
C2	4.47614219E-02;
C3	1.07013243E+02;