Schott SF 3, 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	1.57230542E+00;
B2	3.39661149E-01;
B3	1.03593712E+00;
C1	1.20382183E-02;
C2	5.31603583E-02;
C3	1.20005381E+02;