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Fig. 3 | Advanced Structural and Chemical Imaging

Fig. 3

From: Assessment of off-axis and in-line electron holography for measurement of potential variations in Cu(In,Ga)Se2 thin-film solar cells

Fig. 3

Phase reconstructions by different TIE approaches. Phase reconstructions based on the focal series which is simulated using the original amplitude and phase image shown in Fig. 2a, b. The following differently modified TIEs were used for the reconstructions: a reconstruction according to simple TIE [Eq. (5)], b additionally including symmetrization, and further additionally including a weak (c), a medium (d), and a strong (e) Tikhonov-type filter. In (f) a reconstruction including symmetrization, a medium Tikhonov-type filter and additionally 20 alignment iterations is shown, and finally further a reconstruction, that is additionally based on 5 images using (g) the HOFD derivative approximation or (h) the NR approach. In order to demonstrate the effect of image misalignment, a random shift of \(<\)2 % was added to each image of the simulated defocused image stack previous to the reconstruction procedures

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