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Experimental measurement of the quantitative optical phase emerging from two polystyrene microspheres. Both (a) AP and (b) LRP reconstruct phase maps that appear qualitatively similar, although the AP phase map flattens at the sphere's center. Variances measured in blue boxes. (c) Plot of microsphere thickness from a trace through the center of the large sphere (dashed line) demonstrates close agreement between LRP and ground truth (GT).
