“Billet and Meslin bi-lenses” in two-beam X-ray interferometry

Abstract

The problem of the interference patterns of X-ray interferometers, when the primary beam is a monochromatic X-ray radiation from pointsources is discussed. In this case the diffraction of the beam for vacuum propagation is discussed. X-ray two-beam interferometer with narrow interplane thicknesses, three-block defocused and three-block different thickness systems are used. The analogue is shown of the first two interferometers with the known “Billet bi-lens” system and of the third one with the “Meslin bi-lens” system.