Schott LaK N16A, 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	1.57607885E+00;
B2	3.67649802E-01;
B3	1.16490334E+00;
C1	7.78079836E-03;
C2	2.59315960E-02;
C3	8.23723198E+01;