Schott FK3, 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 9.733466e-001
C1 6.407955e-003
B2 1.466422e-001
C2 2.056529e-002
B3 6.793042e-001
C3 8.049654e+001