FIELD: physics.
SUBSTANCE: invention relates to means of generating x-ray differential phase-contrast images, particularly, to refraction index for generating x-ray differential phase-contrast images. Proposed device comprises structure (41) of refraction with first multitude (44) of first sections (46) for changing phase and/or amplitude of x-rays and second multiple (48) of second sections (50), transparent for x-ray radiation. First and second sections are arranged periodically so that in cross-section structure refraction index profile is made so that second sections are assembled in form of slot-like recesses (54) between first sections provided as projections (56). Adjacent projections form appropriate lateral surfaces (58) partially fencing corresponding recesses assembled in gap. Side surfaces of every recess have varying distance (60) in depth (62) of recess.
EFFECT: high efficiency of dose.
14 cl, 26 dwg
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