Schott Sk14, 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	9.36155374E-01;
B2	5.94052018E-01;
B3	1.04374583E+00;
C1	4.61716525E-03;
C2	1.68859270E-02;
C3	1.03736265E+02;