Fig. 8.
(a) Intensity profile of the field at the aperture: back propagated from 7 cm (solid line); reconstructed from the intensity measured at 7/0/13 cm (dotted line). The intensity contours are at every −3 dB of the peak intensity value. For the same case, (b) shows the intensity (blue line) and phase (red line) along the x axis, and, (c) shows the intensity (blue line) and phase (red line) along the y axis.