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Table 2 The optimal fitting parameters

From: Construct freeform surface directly in an initial layout of an off-axis reflective image system by seed curve extension and simulated annealing algorithm

Parameters onValuesParameters onValues
c−8.069e-04X4−0.046
k− 8.049X2Y2−0.09191
Y− 17.75Y4−0.046
X2−1.553e-05X4Y−2.085e-03
Y24.44e-04X2Y3−1.185e-03
X2Y2.515e-04Y5−9.392e-04
Y31.644e-04