Figure 3
Phase image of a polymer fibre, 13 µm in diameter, and of a circular Be window: the Fresnel fringes from the fibre are not affected by the presence of this polished beryllium plate, which was later used as the front-end window of the beamline. The plate covers the left part of the image. The sample–detector distance was 2.3 m and 2.8 m for the fibre and the plate, respectively, at λ = 0.7 Å. |