Schott Sk10, 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	1.31658740E+00;
B2	2.71655949E-01;
B3	9.68687543E-01;
C1	7.12229232E-03;
C2	2.44417004E-02;
C3	1.05081566E+02;