Schott U 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 1.065919e+000
C1 6.408579e-003
B2 2.198430e-001
C2 2.254744e-002
B3 9.009835e-001
C3 1.019210e+002