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Figure 1
X-ray image of four plano-concave lenses in the holder (a); edges of the parabolic surface are highlighted due to Fresnel diffraction. Distribution of hollows in the symmetry plane (b); ideal parabolic curves, shown with dotted lines, are superimposed on image (b) to illustrate systematic deviation from the expected profile. Projected thickness of diamond in the lens exit plane (c). The discrepancy between expected and calculated profile is very pronounced at the peripheral part of the lens.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 24| Part 6| November 2017| Pages 1137-1145
https://doi.org/10.1107/S1600577517012772
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