Translative lens-based full-field coherent X-ray imaging

Abstract

We describe a full-field coherent imaging approach suitable for hard X-rays based on a classical (i.e. Galilean) X-ray microscope. The method combines a series of low-resolution images acquired at different transverse lens positions into a single high-resolution image, overcoming the spatial resolution limit set by the numerical aperture of the objective lens. We describe the optical principles of the approach, demonstrate the successful reconstruction of simulated phantom data, and discuss aspects of the reconstruction. We believe this approach offers some potential benefits over conventional scanning X-ray ptychography in terms of acquisition speed, spatial bandwidth and radiation dose rate.

X-ray coherent diffraction imaging with an objective lens: Towards three-dimensional mapping of thick polycrystals

“…The approach presented herein shares some roots with, e.g., Fourier ptychography [25][26][27] and phase contrast confocal microscopy [28]. Contrary to Fourier ptychography, however, where the overlapping scanning space and the measurement spaces are conjugated spaces, and which requires a large amount of overlap, our Fourier synthesis method uses the overlapping scans performed in the measurement space and works for a limited amount of overlap.…”