Results 251 to 260 of about 70,372 (266)

Spatially correlated coherent diffractive imaging method

Applied Optics, 2018
Coherent diffractive imaging (CDI) is a lensless, high-resolution imaging method that is currently under rapid development by using X-rays, visible light, or electrons. However, its inherent ambiguities and the need of a priori knowledge about objects are limiting applications based on this method.
Xulei Tao, Zijian Xu, Haigang Liu, Chunpeng Wang, Zhenjiang Xing, Yong Wang, Renzhong Tai   +6 more
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Ptychographic Fresnel coherent diffractive imaging

Physical Review A, 2009
This paper reports improved reconstruction of complex wave fields from extended objects. The combination of ptychography with Fresnel diffractive imaging results in better reconstructions with fewer iterations required to convergence than either method considered separately.
Pfeifer, Mark., Vine, D. J., Williams, G. J., Abbey, B., Clark, Jesse., de Jonge, M. D., McNulty, I., Peele, Andrew Gareth., Nugent, K. A.   +8 more
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Coherent X-Ray Diffractive Imaging

AIP Conference Proceedings, 2010
Coherent X‐ray Diffractive Imaging (CXDI) is a new imaging technique based on the phase retrieval of the coherently scattered wavefield from a finite object in the far field. The most effective approach for the phase retrieval in these conditions is the use of the iterative phase retrieval algorithms well developed in the optics community.
Ivan Vartaniants, Pramod K. Rastogi, Erwin Hack   +2 more
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Coherent X-Ray Diffraction Imaging

IEEE Journal of Selected Topics in Quantum Electronics, 2012
For centuries, lens-based microscopy, such as optical, phase-contrast, fluorescence, confocal, and electron microscopy, has played an important role in the evolution of modern science and technology. In 1999, a novel form of microscopy, i.e., coherent diffraction imaging (also termed coherent diffraction microscopy or lensless imaging), was developed ...
Miao, JW, S, berg, RL, Song, CY
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Single-pixel coherent diffraction imaging

Applied Physics Letters, 2010
We demonstrate single-pixel coherent diffraction imaging, whereby broadband terahertz waveforms passed through a slanted phase retarder (SPR), diffracted from an object, were measured by a terahertz detector located in the far field. For one dimensional imaging, the fixed-location single-pixel broadband detector simultaneously measured all the spatial ...
Lee, K Lee, Kanghee, Ahn, J Ahn, Jaewook
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Curved beam coherent diffractive imaging

Thin Solid Films, 2007
We discuss a coherent diffractive imaging experiment wherein the illuminating X-ray beam is divergent, rather than planar. By reconstructing the illumination at the sample, it is possible to recover the exit surface wave in that plane. With this geometry, the usual iterative reconstruction scheme converges very quickly, without finding the typical ...
G.J. Williams, H.M. Quiney, B.B. Dahl, C.Q. Tran, A.G. Peele, K.A. Nugent, M.D. De Jonge, D. Paterson   +7 more
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Coherence and sampling requirements for diffractive imaging

Ultramicroscopy, 2004
Coherent Diffractive Imaging (CDI) allows images to be reconstructed from diffraction patterns by solving the non-crystallographic phase problem for isolated nanostructures. We show that the Shannon sampling of diffraction intensities needed in CDI requires a coherence width about twice the lateral dimensions of the object, and that the linear number ...
J C H, Spence, U, Weierstall, M, Howells
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Laser-based Coherent Diffractive Imaging

2021
Coherent diffractive imaging is a powerful microscopy for the recovery of the complex exit-surface wave emerging from a sample of interest by recording the intensity of the field diffracted by it. Its application requires strict adherence to the underlying assumptions, which are well met by laser-like sources. This chapter describes the imaging method,
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Diffractive Imaging Using Partially Coherent X Rays

Physical Review Letters, 2009
The measured spatial coherence characteristics of the illumination used in a diffractive imaging experiment are incorporated in an algorithm that reconstructs the complex transmission function of an object from experimental x-ray diffraction data using 1.4 keV x rays. Conventional coherent diffractive imaging, which assumes full spatial coherence, is a
Whitehead, L. W., Williams, G. J., Quiney, H. M., Vine, David., Dilanian, R. A., Flewett, S., Nugent, K. A., Peele, Andrew Gareth., Balaur, Eugeniu., McNulty, I.   +9 more
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Coherent diffractive imaging; Photoreceptors; Analytical Protein Biochemistry; Coherent diffractive imaging

2014
CTB-MPR is a fusion protein between the B subunit of cholera toxin (CTB) and the membrane-proximal region of gp41 (MPR), the transmembrane envelope protein of Human immunodeficiency virus 1 (HIV-1), and has previously been shown to induce the production of anti-HIV-1 antibodies with antiviral functions.
Lee, H., Cherni, I., Yu, H., Fromme, R., Doran, J., Grotjohann, I., Mittman, M., Basu, S., Deb, A., Dörner, K., Aquila, A., Barty, A., Boutet, S., Chapman, H., Doak, R., Hunter, M., James, D., Richard, A., Kupitz, C., Lawrence, R., Liu, H., Nass, K., Schlichting, I., Schmidt, K., Seibert, M., Shoeman, R., Spence, J., Stellato, F., Weierstall, U., Williams, G., Yoon, C., Wang, D., Zatsepin, N., Hogue, B., Matoba, N., Frommea, P., Mor, T.   +36 more
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