Comparing the PASTIS matrix diagonals from the hardware matrix, M^exp (dashed orange line), and simulated matrix, M^sim (solid blue line). Segment number 0 (center segment) in the experimental matrix has the largest absolute contrast influence, but the simulated matrix assumes on average the larger influence of the individual segments on the average DH contrast. This translates directly into more stringent segment tolerances, μ_k, than necessary for the given hardware setup.