Patent ID: 9222899
Filing Date: 2015-12-29
Classification: G01B,G01J,G01N,G02B

Abstract:
1. An X-ray Talbot interferometer comprising: a first grating configured to diffract X-rays from an X-ray source and to form an interference pattern; a second grating configured to block a portion of X-rays that form the interference pattern; and a detector configured to detect X-rays from the second grating, wherein a property of an inspection object disposed between the X-ray source and the second grating is measured, wherein the second grating includes a first shield grating portion in which a shield portion and a transmissive portion are arranged periodically at a first period and a second shield grating portion in which a shield portion and a transmissive portion are arranged periodically at a second period, and the first period is expressed as follows: where ps denotes a size of pixels that the detector has, n denotes a positive integer, Ls denotes a distance from the X-ray source to the first shield grating portion, and Lf denotes a distance from the first shield grating portion to the detector.