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Inspired by the recently successfully demonstrated Shack-Hartmann sensors for hard X-rays, we present a twodimensional compound refractive lens array (CRLA) with parabolic shapes for multimodal X-ray imaging. The promising structure was produced by two-photon polymerization using state-of-the-art 3D-Printer, which allows the manufacturing of sub-micrometer structures. The 2D parabolic microlens array with 12x12 spots was characterized by scanning electron microscopy and X-ray imaging. For an X-ray energy of 8.5 keV the average focal spot size is around 8 μm at a focal distance of 38.2±0.5 cm with a visibility of 0.72. As an example of a potential application for quantitative optics characterization a diamond refractive lens was investigated by multi-contrast imaging resulting in a 0.4 μrad differential phase resolution.
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Andrey A. Mikhaylov, Stefan Reich, Anton Plech, Margarita Zakharova, Vitor Vlnieska, Danays Kunka, "2D lens array for multi-contrast X-ray imaging," Proc. SPIE 11032, EUV and X-ray Optics: Synergy between Laboratory and Space VI, 1103208 (26 April 2019); https://doi.org/10.1117/12.2520687