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Figure 7
(a) Original image of the mesh acquired by microscopy. (b) One local part of the mesh, highlighted in the red rectangle in (a), is a crosshair with a symmetrical structure. The bright margins of the crosshair are caused by the lighting source of the microscope. (c) The corresponding speckle image of the cross hair; the crosshair is shown in (b).

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
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