TALBOT EFFECT BASED NEARFIELD DIFFRACTION FOR SPECTRAL FILTERING Russian patent published in 2018 - IPC G21K1/06 

FIELD: nuclear physics, nuclear technology.

SUBSTANCE: invention relates to a lattice-based arrangement and a method for spectral filtering of an X-ray beam. Lattice-based arrangement comprises a dispersion element comprising a prism configured to diffract the X-ray beam into a first beam component having a first direction and a second beam component having a second direction deflected from the first direction; first grate configured to generate a first diffraction pattern of said first beam component and a second diffraction pattern of said second beam component, second diffraction pattern is shifted relative to the first diffraction pattern; and second grating comprising at least one opening mounted on the line from the maximum to minimum intensity of the first diffraction pattern or the second diffraction pattern.

EFFECT: technical result is improved accuracy of selective energy and improved performance of x-ray filters.

14 cl, 9 dwg