Schott BaSF 2, 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	1.47886368E+00;
B2	2.12804538E-01;
B3	9.96610609E-01;
C1	1.04304076E-02;
C2	4.94153751E-02;
C3	1.20570613E+02;