منابع مشابه
Lensless imaging using broadband X-ray sources
High-resolution X-ray imaging techniques using optical elements such as zone plates are widely used for viewing the internal structure of samples in exquisite detail. The resolution attainable is ultimately limited by the manufacturing tolerances for the optics. Combining ideas from crystallography and holography, this limit may be surpassed by the method of coherent diffractive imaging (CDI)1....
متن کاملLensless diffractive imaging using tabletop coherent high-harmonic soft-X-ray beams.
We present the first experimental demonstration of lensless diffractive imaging using coherent soft x rays generated by a tabletop soft-x-ray source. A 29 nm high harmonic beam illuminates an object, and the subsequent diffraction is collected on an x-ray CCD camera. High dynamic range diffraction patterns are obtained by taking multiple exposures while blocking small-angle diffraction using be...
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We successfully use the corners of a common silicon nitride supporting window in lensless X-ray microscopy as extended references in differential holography to obtain a real space hologram of the illuminated object. Moreover, we combine this method with the iterative phasing techniques of coherent diffraction imaging to enhance the spatial resolution on the reconstructed object, and overcome th...
متن کاملNovel Methods for Hard X-ray Holographic Lensless Imaging
Holography is a coherent imaging method that provides complex-valued reconstructions of the wave field at the exit of a sample by virtue of the interference between the scattered sample wave and a reference wave [1]. Fourier transform holography (FTH) is a robust and reliable method where reconstructions are obtained by a single Fourier transform, owing to a nearby point-scatterer whose transmi...
متن کاملHard-x-ray lensless imaging of extended objects.
We demonstrate a hard-x-ray microscope that does not use a lens and is not limited to a small field of view or an object of finite size. The method does not suffer any of the physical constraints, convergence problems, or defocus ambiguities that often arise in conventional phase-retrieval diffractive imaging techniques. Calculation times are about a thousand times shorter than in current itera...
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ژورنال
عنوان ژورنال: Nature Photonics
سال: 2010
ISSN: 1749-4885,1749-4893
DOI: 10.1038/nphoton.2010.240