نتایج جستجو برای: diffraction imaging

تعداد نتایج: 515781  

2015
Pierre Thibault Manuel Guizar-Sicairos Andreas Menzel

A correction to the article by Thibault et al.

2014
Pierre Thibault Manuel Guizar-Sicairos Andreas Menzel

X-ray ptychography, a scanning coherent diffractive imaging technique, holds promise for imaging with dose-limited resolution and sensitivity. If the foreseen increase of coherent flux by orders of magnitude can be matched by additional technological and analytical advances, ptychography may approach imaging speeds familiar from full-field methods while retaining its inherently quantitative nat...

2010
Jan F. Steinbrener Chris Jacobsen

X-ray Diffraction Microscopy (XDM) has been gaining in popularity for nanoscale imaging of biological and material science samples. Its high penetration depth (compared to electron microscopy) and its good dose efficiency (compared to its lens-based X-ray alternative) make it uniquely suited for imaging whole biological specimens, where radiation damage is a concern. Despite these advantages, X...

Journal: :Physical review letters 2009
L W Whitehead G J Williams H M Quiney D J Vine R A Dilanian S Flewett K A Nugent A G Peele E Balaur I McNulty

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 limiting case of our approach. Even in cas...

2015
Kristin A. Gabor Dahan Kim Carol H. Kim Samuel T. Hess

Light microscopy enables noninvasive imaging of fluorescent species in biological specimens, but resolution is generally limited by diffraction to ~200-250 nm. Many biological processes occur on smaller length scales, highlighting the importance of techniques that can image below the diffraction limit and provide valuable single-molecule information. In recent years, imaging techniques have bee...

2008
Will Saunders Peter Gillingham Andrew McGrath Roger Haynes John Storey Jon Lawrence Michael Burton Charles Jenkins Alcione Mora

PILOT (the Pathfinder for an International Large Optical Telescope) is a proposed Australian/European optical/infrared telescope for Dome C on the Antarctic Plateau, with target first light in 2012. The proposed telescope is 2.4m diameter, with overall focal ratio f/10, and a 1 degree field-of-view. In median seeing conditions, it delivers 0.3" FWHM widefield image quality, from 0.7-2.5 microns...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2007
Peter R H Stark Allison E Halleck Dale N Larson

The optical diffraction limit has been the dominant barrier to achieving higher optical resolution in the fields of microscopy, photolithography, and optical data storage. We present here an approach toward imaging below the diffraction barrier. Through the exposure of photosensitive films placed a finite and known distance away from nanoscale, zero-mode apertures in thin metallic films, we sho...

Journal: :Physical review letters 2008
Changyong Song Huaidong Jiang Adrian Mancuso Bagrat Amirbekian Li Peng Ren Sun Sanket S Shah Z Hong Zhou Tetsuya Ishikawa Jianwei Miao

We report the recording and reconstruction of x-ray diffraction patterns from single, unstained viruses, for the first time. By separating the diffraction pattern of the virus particles from that of their surroundings, we performed quantitative and high-contrast imaging of a single virion. The structure of the viral capsid inside a virion was visualized. This work opens the door for quantitativ...

Journal: :Journal of experimental botany 2007
Lester W Young Christopher Parham Zhong Zhong Dean Chapman Martin J T Reaney

Techniques that make possible the non-destructive continuous observation of plant anatomy and developmental processes provide novel insights into these phenomena. Non-destructive imaging of seeds was demonstrated using the synchrotron-based X-ray imaging technique, diffraction enhanced imaging (DEI). The seed images obtained had good contrast and definition, allowing anatomical structures and p...

Journal: :Optics express 2008
J N Clark G J Williams H M Quiney L Whitehead M D de Jonge E Hanssen M Altissimo K A Nugent A G Peele

We demonstrate high spatial resolution phase retrieval of a non-periodic gold nano-structure using the method of Fresnel coherent diffractive imaging. The result is quantitative to better than 10% and does not rely on any a priori knowledge of the sample.

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