نتایج جستجو برای: diffraction imaging

تعداد نتایج: 515781  

Journal: :Journal of Research of the National Institute of Standards and Technology 1999

Journal: :Journal of Research of the National Bureau of Standards 1988

Journal: :Optics express 2014
Yangjie Wei Chengdong Wu Zaili Dong

Depth from defocus (DFD) based on optical methods is an effective method for depth reconstruction from 2D optical images. However, due to optical diffraction, optical path deviation occurs, which results in blurring imaging. Blurring, in turn, results in inaccurate depth reconstructions using DFD. In this paper, a nanoscale depth reconstruction method using defocus with optical diffraction is p...

Journal: :Physical review letters 2009
Xiaojing Huang Johanna Nelson Janos Kirz Enju Lima Stefano Marchesini Huijie Miao Aaron M Neiman David Shapiro Jan Steinbrener Andrew Stewart Joshua J Turner Chris Jacobsen

We report the first image of an intact, frozen hydrated eukaryotic cell using x-ray diffraction microscopy, or coherent x-ray diffraction imaging. By plunge freezing the specimen in liquid ethane and maintaining it below -170 degrees C, artifacts due to dehydration, ice crystallization, and radiation damage are greatly reduced. In this example, coherent diffraction data using 520 eV x rays were...

Journal: :Physical review letters 2008
Ke Li L Deng E W Hagley M G Payne M S Zhan

We demonstrate matter-wave self-imaging resulting from atomic center-of-mass motion-based interference. We show that non-negligible atomic center-of-mass motion and an instantaneous Doppler shift can drastically change the condensate momentum distribution, resulting in a periodic collapse and the recurrence of condensate diffraction probability as a function of the stationary light-field pulsin...

Journal: :Journal of Experimental Botany 2007

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