Schott LLF 1, 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	1.21640125E+00;
B2	1.33664540E-01;
B3	8.83399468E-01;
C1	8.57807248E-03;
C2	4.20143003E-02;
C3	1.07593060E+02;