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Figure 4
Stacking of two FZPs. (a) Two identical FZPs separated by a very short distance ld can be stacked in the near-field to obtain an equivalent thicker structure and to achieve a substantial increase in diffraction efficiency. (b) The close proximity requirement on the two stacked FZPs can be relaxed by adjusting the diameter, D2, of the second diffractive optical element.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 20| Part 3| March 2013| Pages 397-404
doi:10.1107/S090904951300263X
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