Abstract
An X-ray analyzer-based optics with a zoom function is proposed for observing various samples with apparent-absorption contrast, phase contrast and scattering contrast. The proposed X-ray optics consists of a collimator crystal and an analyzer crystal arranged in a nondispersive (+, -) geometry with a sample placed between them. For the implementation of the zoom function, an asymmetrically cut crystal in the rotated-inclined geometry was used for the analyzer. Proof-of-principle experiments were performed at the vertical wiggler beamline BL-14B of the Photon Factory. First, the magnification was set to 1×, and then it was zoomed into the optimal magnification (10×). At these magnifications, tri-modal contrast cross-sectional images of a sample were obtained by computed tomography. It was confirmed that the image quality at 10× was superior to that at 1×. This achievement opens up new possibilities for observing an entire sample or regions of interest within a sample at optimal magnification, and is expected to be useful for materials science, condensed matter physics, archeology and biomedical science.
Highlights
X-ray analyzer-based imaging (ABI) is a powerful method for nondestructive observation of the inner structures of a wide variety of specimens (Davis et al, 1995; Chapman et al, 1997)
ABI has been widely used for research in such fields as materials science, condensed matter physics, archeology and biomedical science
We propose the incorporation of this optical element into ABI to realize an X-ray zooming optical system for observing apparent-absorption contrast and phase contrast images and scattering contrast images
Summary
X-ray analyzer-based imaging (ABI) is a powerful method for nondestructive observation of the inner structures of a wide variety of specimens (Davis et al, 1995; Chapman et al, 1997). One of the most striking features of ABI is that it can produce apparent-absorption contrast and phase contrast images and scattering contrast images from a set of recorded images (Pagot et al, 2003; Rigon et al, 2007) Thanks to this advantage, ABI has been widely used for research in such fields as materials science, condensed matter physics, archeology and biomedical science. Toward this end, we developed an X-ray Bragg magnifier with a zoom function (Hirano et al, 2014). We propose the incorporation of this optical element into ABI to realize an X-ray zooming optical system for observing apparent-absorption contrast and phase contrast images and scattering contrast images
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