Schott FK5, 280nm - 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 8.443093e-001
C1 4.751120e-003
B2 3.441478e-001
C2 1.498148e-002
B3 9.107902e-001
C3 9.786003e+001