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Updated: Sep 26, 2026

Measurement of X-ray Beam Coherence along Multiple Directions Using 2-D Checkerboard Phase Grating
Published on: October 11, 2016
Nonuniform coherence sampling for fields produced by incoherent three-dimensional sources
J Christopher James1, Gisele Welch, William T Rhodes
1Georgia Tech Research Institute, Atlanta, Georgia 30332-0834, USA. chris.james@gtri.gatech.edu
Abstract:
A nonuniform sampling scheme is described for measuring the mutual intensity of the wave field produced in a plane a distance z from a spatially incoherent, three-dimensional source object. Both uniform and nonuniform sampling are analyzed and discussed in detail, and comparisons of the two schemes are made. It is shown that nonuniform sampling requires fewer measurements than uniform sampling to specify the coherence function. Additionally, the smallest separation required between measurement points is larger for the nonuniform case.
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