Abstract
An experimental procedure for transmission X-ray ghost imaging using synchrotron light is presented. Hard X-rays from an undulator were divided by a beamsplitter to produce two copies of a speckled incident beam. Both beams were simultaneously measured on an indirect pixellated detector and the intensity correlation between the two copies was used to retrieve the ghost image of samples placed in one of the two beams, without measuring the samples directly. Aiming at future practical uses of X-ray ghost imaging, the authors discuss details regarding data acquisition, image reconstruction strategies and measure the point-spread function of the ghost-imaging system. This approach may become relevant for applications of ghost imaging with X-ray sources such as undulators in storage rings, free-electron lasers and lower-coherence laboratory facilities.
Highlights
Imaging methods may be broadly categorized as either direct or indirect
Conventional ghost-imaging reconstruction can be obtained with the formula (Bromberg et al, 2009; Katz et al, 2009): vi
We have presented an experimental realization of X-ray ghost imaging using synchrotron X-rays from an undulator
Summary
Imaging methods may be broadly categorized as either direct or indirect. Methods for indirect X-ray imaging, in which the registered data bear no direct resemblance to the sample, include X-ray crystallography, coherent diffractive X-ray imaging, inline X-ray holography and X-ray ghost imaging. Our focus in the present paper is on the translation of the ghost-imaging concept into the classical X-ray domain. With only four published papers at the time of writing (Yu et al, 2016; Pelliccia et al, 2016; Schori & Shwartz, 2017; Zhang et al, 2018), the field of X-ray ghost imaging is still in its absolute infancy and has much scope for optimization and further development
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