Schott SF 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	1.40301821E+00;
B2	2.31767504E-01;
B3	9.39056586E-01;
C1	1.05795466E-02;
C2	4.93226978E-02;
C3	1.12405955E+02;