X-ray zooming microscopy with two Fresnel zone plates

We propose a variable-magnification full-field x-ray microscope using two Fresnel zone plates (FZPs). By moving the positions of the two FZPs, the magnification can be continuously changed even if the sample and camera positions are fixed. It was demonstrated that the magnification can be changed in the range of 25-150x using a hard x-ray beam at 14.4 keV. Using the first FZP as a convex lens and the second FZP as a concave lens, high magnification can be achieved at a short camera length. Even under the condition of a camera length of about 7 m, a magnification higher than 300x was achieved, and a line and space pattern with a pitch of 40 nm was observed at 10 keV. By inserting a knife edge at an appropriate position in the optical system, a phase-contrast image can be easily obtained, which is useful for soft-tissue observation of biological samples. Published under an exclusive license by AIP Publishing.

Automated summary

In this paper, a variable-magnification full-field x-ray microscope using two Fresnel zone plates (FZPs) is proposed. The positions of the two FZPs can be adjusted to continuously change the magnification, even if the sample and camera positions are fixed. Experimental results demonstrate that the magnification can be changed in the range of 25-150x using a hard x-ray beam, and high magnification can be achieved at a short camera length.