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Figure 5
(a) Raw speckle images at three different positions of the DMM. These images have been rotated by 90°. The pattern of vertical stripes from the multilayer structure of the monochromator varies between each position providing three different incident wavefronts. (b) The corresponding calculated 2D maps of the wavefront slope error showing no obvious variation between them. The horizontally reflecting setup of the mirror being tested decouples the strong vertical variations derived from the DMM.

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ISSN: 1600-5775
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