This article describes holographic imaging experiments using a hard X-ray multilayer zone plate (MZP) with an outermost zone width of 10nm at a photon energy of 18keV. An order-sorting aperture (OSA) is omitted and emulated during data analysis by a 'software OSA'. Scanning transmission X-ray microscopy usually carried out in the focal plane is generalized to the holographic regime. The MZP focus is characterized by a three-plane phase-retrieval algorithm to an FWHM of 10nm.
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Osterhoff, M., Eberl, C., Döring, F., Wilke, R. N., Wallentin, J., Krebs, H. U., … Salditt, T. (2015). Towards multi-order hard X-ray imaging with multilayer zone plates. Journal of Applied Crystallography, 48(1), 116–124. https://doi.org/10.1107/S1600576714026016