Schott LF 7, 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	1.26879731E+00;
B2	1.56697051E-01;
B3	8.87676301E-01;
C1	9.19553925E-03;
C2	4.47256764E-02;
C3	1.06820361E+02;