Schott K50, 313nm - 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 1.018879e+000
C1 5.948713e-003
B2 2.668226e-001
C2 2.151668e-002
B3 9.066720e-001
C3 1.021403e+002