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Figure 4
Pseudocolor representation of the Fourier transform (Patterson map) of the diffraction pattern as shown in Fig. 3[link], after restoration of the intensities under the beamstop (see §2[link]). Besides the pair of images of the Chinese character around the center (white arrow), additional images were created in the outer area owing to the matrix arrangement of characters. Of these only a single pair is clearly recognized (pink arrow). Others are corrupt (gray arrows). These arrows point to the short sidebar of the Chinese character. The upward pointing arrows indicate the centers of additional autocorrelation terms. Note that the vertical ones (red arrow) are brighter than the horizontal ones (green arrow). Scale bar: 1 µm.

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