Schott SSK 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	1.41096166E+00;
B2	1.72425615E-01;
B3	9.87461513E-01;
C1	8.05433250E-03;
C2	3.24360835E-02;
C3	1.09899586E+02;