ABSORPTION GRATING AND TALBOT INTERFEROMETER

摘要

An absorption grating (3) includes a plurality of small absorption gratings in which transmitting portions configured to transmit X-rays and shielding portions configured to block the X-rays are arranged. Each of the plurality of small absorption gratings includes a two-dimensional grating area in which the transmitting portions and the shielding portions are arranged in two intersecting directions, and a one-dimensional grating area in which the transmitting portions and the shielding portions are arranged in one direction. The one-dimensional grating area is provided in at least a part of an outer periphery of the two-dimensional grating area. At least parts of the one-dimensional grating areas included in the adjacent small absorption gratings are superposed to form an overlapping area. The arrangement directions in the small absorption gratings intersect in the overlapping area.