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Pushing synchrotron x-ray radiography to increasingly higher image-acquisition rates (currently up to 100,000 fps) while maintaining spatial resolutions in the micrometer range implies drastically reduced fields of view. As a consequence, either imaging a small subregion of the sample with high spatial resolution or only the complete specimen with moderate resolution is applicable.We introduce a concept to overcome this limitation by making use of a semi-transparent x-ray detector positioned close to the investigated sample. The hard x-rays that pass through the sample either create an image on the first detector or keep on propagating until they are captured by a second x-ray detector located further downstream. In this way, a process can be imaged simultaneously in a hierarchical manner within a single exposure and a projection of the complete object with moderate resolution as well as a subregion with high resolution are obtained. As a proof-of-concept experiment, image sequences of an evolving liquidmetal foam are shown, employing frame rates of 1000 images/s (1.2 μm pixel size) and 15;000 images/s (18.1 μm pixel size) for the first and second detector, respectively. © 2013 Optical Society of America.
View more info for "Hierarchical radioscopy using polychromatic and partially coherent hard synchrotron radiation"
Journal | Data powered by TypesetApplied Optics |
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Publisher | Data powered by TypesetOSA - The Optical Society |
ISSN | 1084-7529 |
Impact Factor | 1.230 |
Open Access | No |
Citation Style | unsrt |
Sherpa RoMEO Archiving Policy | Green |