Schott SF 54, 405nm - 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	1.60371792E+00;
B2	3.10740554E-01;
B3	1.03053604E+00;
C1	1.24263783E-02;
C2	5.51896382E-02;
C3	1.15762058E+02;