2D lens array for multi-contrast X-ray imaging
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2019-04-26 |
| Authors | Andrey Mikhaylov, Stefan Reich, Anton Plech, Margarita Zakharova, Vitor Vlnieska |
| Institutions | Karlsruhe Institute of Technology |
Abstract
Section titled āAbstractāInspired by the recently successfully demonstrated Shack-Hartmann sensors for hard X-rays, we present a twodimensional compound refractive lens array (CRLA) with parabolic shapes for multimodal X-ray imaging. The promising structure was produced by two-photon polymerization using state-of-the-art 3D-Printer, which allows the manufacturing of sub-micrometer structures. The 2D parabolic microlens array with 12x12 spots was characterized by scanning electron microscopy and X-ray imaging. For an X-ray energy of 8.5 keV the average focal spot size is around 8 Ī¼m at a focal distance of 38.2Ā±0.5 cm with a visibility of 0.72. As an example of a potential application for quantitative optics characterization a diamond refractive lens was investigated by multi-contrast imaging resulting in a 0.4 Ī¼rad differential phase resolution.