Schott BK3, 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 1.005827e+000
C1 6.174161e-003
B2 2.120964e-001
C2 1.877926e-002
B3 8.982909e-001
C3 8.887350e+001