Schott BaLK N3, 313nm - 2325nm
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2 1
SQRT(1+B1*wvl^2/(wvl^2-C1)+B2*wvl^2/(wvl^2-C2)+B3*wvl^2/(wvl^2-C3))
0
B1 1.116317e+000
C1 6.841098e-003
B2 1.572606e-001
C2 2.570488e-002
B3 9.140297e-001
C3 1.059192e+002