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(Color online) Scheme of the tomography setup using the divergent beam produced by Kirkpatrick-Baez optics.
Wave front characterization with a period grid. Left, distorted image; middle top, vertical angular deviation as a function of the vertical pixel coordinate; middle bottom, horizontal angular deviation as a function of the horizontal pixel coordinate; right, same grid image after correction of the distortions. The optical figure errors increase toward the edges of the mirrors.
Magnified radiography of a freeze-dried neuron cell demonstrating the effect of the sample-to-focus distance on the magnification and equivalent propagation distance . The radiographs were recorded at of (a) 225 mm, 175 mm, (b) 125 mm, 75 mm and (c) 45 mm. Combining numerically five radiographs a phase map (d) with a pixel size of is retrieved.
(Color online) (a) Tomographic slice of an Al–Si alloy. Inset: Profile of the changes in refractive index. (b) Rendering of a large extracted volume showing silicon particles (bright), a pore (red), and iron rich inclusions (blue).
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