Fig. 3: Extended field of view retrieved image.

a 3D density and (b) phase plots, retrieved with the proposed BP approach in the (x, y, z) laboratory frame. The grey volume represents an iso-surface based on the recovered object density, while the slices show the internal structure of density and phase, respectively. The field of view extends over 0.6 × 6 × 6 μm³. c, d Cross sections of the crystal density and phase, respectively, shown over the plane indicated by red dashed rectangles at z = 4.7 μm in (a) and (b), and (e) the associated retrieved probe. f, g 3D density and phase reconstructions, respectively, obtained from the same dataset, using the former BP approach. Note the strong reduction of the field of view (evidenced by the dashed rectangle) and the degradation of the image quality. A comparison of the total possible field of view is shown in supplementary Fig. 3d, including regions of the possible field of view that are non-scattering due to the finite extent of the considered crystal. h Probe cross-section, plotted in the (p₁, p₂) plane, used for this second reconstruction, limited along p₁ according to the conjugation relations applied to the experimental parameters. As the probe is kept fixed during this process, the probe profile is extracted from a separate and dedicated probe reconstruction (Methods). The colour scale for the density, phase and probe (hue rendering) are indicated on the plots (a), (b) and (e), respectively.