Schott BaF 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	1.44967157E+00;
B2	1.31600677E-01;
B3	9.39224513E-01;
C1	9.19052911E-03;
C2	4.25730108E-02;
C3	1.12153963E+02;