Phase Contrast X-Ray Imaging Device and Phase Grating Therefor

A phase grating for a phase contrast X-ray imaging, the phase grating comprising:

• a transverse surface to be aligned substantially transversely with respect to a radiation incidence direction, said transverse surface being spanned by an x-axis and a y-axis perpendicular to said x-axis;
• a multiplicity of grating webs composed of a basic material and alternately arranged with optically denser interspaces, said grating webs dividing said transverse surface into grating strips that are in each case elongated in a y-direction of said y-axis and that are lined up parallel alongside one another in an x-direction of said x-axis;
• at least one of said grating webs extending within said transverse surface across a plurality of said grating strips;
• and
• the phase grating, at each said grating strip along a z-axis that extends perpendicularly to said transverse surface, having a homogeneous total thickness of said basic material that differs between mutually adjacent said grating strips;
• and