Coherent lensless X-ray imaging

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Multiscale X-ray tomography of cementitious materials: A review (2020, background): “H, in the range of 1 − 100 nm. Progress towards the development of Fresnel lenses capable of producing spatial resolution of a few nanometers [413] has been slow so the use of coherent lensless x-ray imaging, or Coherent Diffraction Imaging (CDI) becomes very attractive (Chapman and Nugent [414] giv”
Imaging without lenses: achievements and remaining challenges of wide-field on-chip microscopy (2012, background): “…of lens-free microscopes relies on computation (on the basis of, for example, digital holography 1–17 or coherent diffractive imaging techniques 30–36 ) to partially undo the effects of diffraction that occur between the object and the imaging without lenses: achievements and remaining…”
Lensless imaging using broadband X-ray sources (2011, background): “The above estimates indicate that the FWHM of a full undulator harmonic is three times larger than the maximum value that can be tolerated using quasi-monochromatic CDI; in practice, we expect this factor to be considerably larger because equation (1) is probably an idealized limit not achievable in”