Schott BaLF 50, 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	1.37380053E+00;
B2	1.04741149E-01;
B3	1.00909296E+00;
C1	8.71950907E-03;
C2	3.97152827E-02;
C3	1.14462081E+02;