Schott F 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	1.34533359E+00;
B2	2.09073176E-01;
B3	9.37357162E-01;
C1	9.97743871E-03;
C2	4.70450767E-02;
C3	1.11886764E+02;