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Figure 5
(a) Transmitted (left) and diffracted (right) projections of three gold foil fiducial markers captured by a single exposure. Separated and aligned (b) diffracted and (c) transmitted images produced using the positions of the three fiducial markers in the projections. We can check the quality of the alignment by producing an image of the (d) difference between diffracted over transmitted projections. Any misalignment between these two images will be visible through bright and dark arcs around the fiducial markers, making them stand out from the background. Only slight imperfections in the alignment can be seen. The `chicken wire' structure is produced from the fibre optic taper in the detector the wavefield travels through before incident upon the CCD chip.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 28| Part 1| January 2021| Pages 283-291
https://doi.org/10.1107/S1600577520013995
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