Schott LLF 2, 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	1.21698785E+00;
B2	1.12444132E-01;
B3	8.39332216E-01;
C1	8.67187700E-03;
C2	4.26921868E-02;
C3	1.02332654E+02;