Schott BK10, 297nm - 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 8.883081e-001
C1 5.169008e-003
B2 3.289645e-001
C2 1.611900e-002
B3 9.846108e-001
C3 9.975753e+001