Schott PK50, 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 1.207263e+000
C1 6.835026e-003
B2 7.744847e-002
C2 2.527553e-002
B3 7.705524e-001
C3 8.417071e+001