Schott SF 8, 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	1.49514446E+00;
B2	2.62529687E-01;
B3	9.69567597E-01;
C1	1.14990201E-02;
C2	5.17170156E-02;
C3	1.13458641E+02;