Schott FK5, 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 9.712478e-001
C1 4.723020e-003
B2 2.169014e-001
C2 1.535756e-002
B3 9.046517e-001
C3 1.686813e+002