Increase in the Resolution of Hard X-Ray Phase-Contrast Imaging in a Device Based on a Triple Laue-Case Interferometer

The possibility of increasing the resolution of X-ray phase-contrast imaging with a device based on a triple Laue-case interferometer is considered. To address one of the drawbacks of this scheme-the distortion of the interference pattern during diffraction of the object wave on the interferometer analyzer-it is proposed to replace the analyzer with two crystalline blocks of equal thickness. These blocks act as a diffraction lens, suppressing the mentioned distortions. Numerical simulations demonstrate that the low coherence of the initial radiation increases the quality of phase-contrast imaging using this method.