Schott Sk2, 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	1.30663485E+00;
B2	2.39791700E-01;
B3	9.84058076E-01;
C1	7.08163720E-03;
C2	2.38828823E-02;
C3	1.01983392E+02;