Figure 5 Interferogram comparison between the WDF formalism and equations from Yin et al. (2000). Simulation parameters: z1 = 10 cm, z2 = 30 cm, z4 = 0.5 m, σx = 75 µm, λ = 50 nm, a = 6 µm, N = 11, m2 = 1. As shown by the figures, the two formalisms agree with each other.