Schott SF 19, 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	1.45495978E+00;
B2	2.37838143E-01;
B3	9.58586139E-01;
C1	1.09532717E-02;
C2	5.05230583E-02;
C3	1.09770239E+02;