Fig. 2: Fourier ring correlation and reconstruction radial profiles from gold on amorphous carbon.
From: Sub-ångström resolution ptychography in a scanning electron microscope at 20 keV
(Blue line) Radially summed profile of the FT of the gold on amorphous carbon reconstruction given in Fig. 1c; (dashed black line) model radial diffraction intensities expected for randomly oriented gold particles, labelled with dominant diffraction plane indices for each peak; (magenta line) Fourier ring correlation (FRC) measure obtained from comparison of two independently determined reconstructions, each using half of the data used to form the reconstruction in Fig. 1; (dashed orange line) FRC from a reconstruction using an aperture on the probe FT and an initial random phase object; and (green line) the half-bit resolution threshold. The maximal crossing of the FRC characteristic with the threshold gives the resolution as 0.67 Å.
