Schott SF 16, 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	1.40807178E+00;
B2	2.22238425E-01;
B3	9.27122336E-01;
C1	1.06739770E-02;
C2	4.96646920E-02;
C3	1.10900330E+02;