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Figure 3
Ptychographic reconstruction of the KB probe at 13.8 keV with KB entrance slits 100 µm × 100 µm, reconstructed from data recorded by the Lambda detector and without pinhole [dataset 3 of Wilke et al., 2015BB83)]. (a) Amplitude and phase are drawn according to the colourbar next to the image. Vertical and horizontal line-cuts through the intensity in the focal plane yield FWHM = 217 nm and FWHM = 136 nm, respectively. (b, c) Intensity distribution as calculated from numerical propagation of the reconstructed field, in the (b) yx and (c) zx planes. (d) Normalized sharpness as obtained from an area integral of the squared intensity, along with a Lorentzian fit, yielding a depth of focus of 1.53 mm (FWHM). Scale bar in (a): 500 nm.

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