Patent ID: 9557280
Date: 2017-01-31
CPC Classifications: G01N

Claim:
1. An X-ray tomography device for providing a 3D tomography image of a sample, said device comprising: a X-ray source emitting a photon beam in the direction of a beam axis, said photon beam having a solid angle higher than 0.1 degree around said beam axis, a cell adapted to include a porous sample to be imaged, said cell being situated inside the photon beam and being able to rotate about a cell angle around a cell axis that is substantially perpendicular to the beam axis, and said cell further including an input conduit to flood the cell by at least one fluid, a photon detector receiving a transmitted photon beam that is transmitted through said cell, said photon detector providing at least one acquired image for each angle of a plurality of cell angles, and a processing unit that computes the 3D tomography image on the basis of the acquired images corresponding to the plurality of cell angles, wherein the device further comprises a first and a second gratings positioned between the cell and the detector, so as the photon detector provides at least a first image corresponding to absorption contrast and a second image corresponding to differential phase contrast, the second grating having a grating period lower than 200 nm, and the device further comprises a microscope between said second grating and the detector, for adapting the transmitted photon beam passing through the first and second gratings and being focalised to the detector, said detector being an X-ray Charge Coupled Device having a resolution of at least ten megapixels.