Schott BaSF 56, 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	1.46891540E+00;
B2	2.01528500E-01;
B3	9.60506292E-01;
C1	1.03259426E-02;
C2	4.89113995E-02;
C3	1.16457211E+02;