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![[Figure 1]](hf5252fig1mag.jpg)
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Figure 1
Schematic drawing of the X-ray Zernike phase-contrast set-up. The unfocused X-ray beam with a size of ∼900 µm × 1200 µm at a distance of 68 m from the source passes a segmented condenser which focuses the beam to a circular spot of 50 µm diameter defined by the overlap of subfields in the condenser. The central part of the beam is blocked by a central stop with a diameter of 450 µm located a few millimeters before the condenser. An order-sorting aperture with an inner diameter of 250 µm is used to block the zeroth and higher-order contributions from the condenser. The light path of the first diffraction order from the beam shaper that is not scattered by the sample is depicted in dark gray. The central stop and the order-sorting aperture were omitted for clarity. |
![[Figure 1]](hf5252fig1.jpg)
 | JOURNAL OF SYNCHROTRON RADIATION |
ISSN: 1600-5775
