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![[Figure 2]](ys5105fig2mag.jpg)
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Figure 2
Representative examples of the normalized intensity distribution I(r), recorded with the CCD camera at two opposite intra- and extra-focal positions in a defocus of −230 mm and +230 mm (top). The central scatter peak, initially used to align the patterns, contributes ∼1–2% to the total power and is erased from all data sets before phase retrieval. Each image is composed of 512 × 512 pixels (13.5 µm) and scanned in the radial direction r at angles 0° ≤ φ < 180°. White dashed arcs indicate the expected geometrical cross-section of the beam in the case of ideal alignment. Corresponding radial histograms of rays are displayed for the case φ = 0° (bottom). |
![[Figure 2]](ys5105fig2.jpg)
 | JOURNAL OF SYNCHROTRON RADIATION |
ISSN: 1600-5775
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