Phase-Contrast X-Ray Imaging Using Both Vertically and Horizontally Expanded Synchrotron Radiation X-Rays with Asymmetric Bragg Reflection

Abstract

Results of phase-contrast X-ray imaging are presented. The optical system employed consisted of a successive arrangement of horizontal and vertical (+, -) double crystals taking asymmetric Bragg reflection with an asymmetry factor of ∼0.2. The original beam size was thus expanded in both directions and the field of view actually obtained was ∼5×5 mm2. Boundary structures in samples were clearly observed with much higher contrast than those obtained in conventional absorption-contrast imaging. Since this method works in real time, it will provide a new X-ray imaging diagnosis technique for in situ observation over a large area of the samples.