Patent ID: 9230703
Filing Date: 2016-01-05
CPC Classification: A61B,C25D,G21K

Claim Text:
1. An absorption grating, wherein the grating is suitable for analyzing an interference image in an interferometer for x-ray imaging by a phase contrast method and/or dark field imaging and comprises a carrier and at least two materials which absorb x-rays, the at least two materials comprising (a) gold or lead and (b) a material comprising an element with an atomic number lower than that of gold and down to that of barium, and wherein the grating has a layer structure selected from (i) carrier/ML1/ML2, (ii) carrier/ML1/ML2/ML3, (iii) carrier/ML1/ML2/ML3/ML4, (iv) carrier/ML1/ML2/ML3/ML4/ML5, (v) ML1/carrier/ML2, (vi) ML1/ML2/carrier/ML3, (vii) ML1/ML2/carrier/ML3/ML4, (viii) ML1/ML2/ML3/carrier/ML4, (ix) ML1/ML2/ML3/carrier/ML4/ML5, wherein ML stands for material layer or metal layer.