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Figure 5
The shape of the groove is described by a function y(x). For the groove to behave as a sagittal lens, it is necessary that y(x) is a parabola. The parabola shown here is calculated for (111) diffraction on an Si crystal, λ = 0.15 nm, f = 10 m and R = 1.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 5| Part 4| July 1998| Pages 1206-1210
https://doi.org/10.1107/S0909049598002155
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