The use of zoneplates for point projection imaging

11th International Conference on X-ray Microscopy

Baumbach, Stefan^1 ; Wilhein, Thomas^1

Institute for X-Optics, RheinAhrCampus Remagen, University of Applied Sciences Koblenz, Suedallee 2, 53424 Remagen, Germany^1

关键词: High resolution image;    Micro-focus x-ray tubes;    Order selection;    Phase-contrast imaging;    Point projection;    Spot sizes;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/463/1/012014/pdf
DOI  :  10.1088/1742-6596/463/1/012014

来源: IOP

【 摘 要 】

For point projection and phase contrast imaging very small x-ray spot sizes are the key to achieve high resolution images. This article shows a concept of demagnifing the spot of an 8-keV micro focus x-ray tube with a zoneplate. The zoneplate in combination with an order selection aperture acts as a monochromator, which is an enhancement especially for phase contrast imaging. With this concept, the resolution in our point projection microscope has been improved by a factor about two.