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(a) and (b) In-focus image, (c) and (d) intensity derivative, and (e) and (f) retrieved phase images from a gold particle. A 0.9 eV wide energy-selecting slit was used to obtain (a), (c), and (e) and a 10 eV energy-selecting slit for (b), (d), and (f).
(a) In-focus image, (b) intensity derivative, and (c) retrieved phase images from gold particles. In this instance, only one particle displays phase deviations. These occur at a region of a particle with the intensity derivative has a noticeably lower value.
(a) and (b) Maps and profiles of an intensity derivative artificially constructed to look similar to those observed experimentally. In (b), the intensity derivative in the middle of the circular region is lower than in (a). The corresponding retrieved phase is shown in (c) and (d).
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