Fig. 3: Experimental validation using known samples.

The sample fields were retrieved by the RDI algorithm: a United States Air Force resolution target (a), spherical polystyrene microbead (b), and microbead cluster (c). The measured intensities, retrieved Fourier fields, retrieved amplitudes, and retrieved phases are shown. The cross-section plots of the phase images are provided along the white dotted lines in (b) and (c). The phase unwrapping algorithm was applied. The Fourier spectrum is represented on a log scale.