Results 41 to 50 of about 7,202 (228)
Molecules, 2022 A series of regioisomers of the hydroxystearic acid (HSA) was prepared, and the effect of the position of the hydroxyl group along the chain on a panel of human cancer cell lines was investigated.
Natalia Calonghi +9 more
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Fourier Ptychography with Scheimpflug Optics for Multi-Aperture Applications [PDF]
, 2017 We present a new optical configuration using the Scheimpflug principle for Fourier ptychography microscopy. This configuration minimizes the aberrations present in the off-axis lenses of a multi-aperture Fourier ptychography setup. A 3D printed setup was
Harvey, Andrew R. +2 more
core +1 more source
, 2019 Ptychography is a computational imaging technique. A detector records an extensive data set consisting of many inference patterns obtained as an object is displaced to various positions relative to an illumination field. A computer algorithm of some type is then used to invert these data into an image.
John Rodenburg, Andrew Maiden
openaire +3 more sources
X-ray Fourier ptychography [PDF]
Science Advances, 2019 A new image acquisition scheme increases resolution and sensitivity of x-ray microscopes.
Klaus Wakonig +7 more
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Water Window Ptychographic Imaging with Characterized Coherent X-rays [PDF]
, 2015 We report on a ptychographical coherent diffractive imaging experiment in the water window with focused soft X-rays at $500~\mathrm{eV}$. An X-ray beam with high degree of coherence was selected for ptychography at the P04 beamline of the PETRA III ...
Dzhigaev, Dmitry +10 more
core +2 more sources
, 2022 Coherent illumination reflected by a remote target may be secondarily scattered by intermediate objects or materials. Here we show that phase retrieval on remotely observed images of such scattered fields enables imaging of the illuminated object at resolution proportional to $ R_s/A_s$, where $R_s$ is the range between the scatterer and the target ...
Huang, Qian +4 more
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Improved resolution Fourier ptychography scheme using oil‐filled dome‐shaped LED array
Electronics Letters, 2022 Utilising angular‐varied illumination in Fourier Ptychography, the resolution of optical microscopes can be increased and the phase of the sample can also be recovered while maintaining a wide field‐of‐view.
Mahdieh Gholami Mayani +3 more
doaj +1 more source
Low-dose phase retrieval of biological specimens using cryo-electron ptychography
Nature Communications, 2020 Cryo-electron microscopy is widely employed in structural biology and uses phase contrast imaging. Here, the authors employ electron ptychography, a quantitative phase retrieval method for high-contrast, low-dose phase imaging of cryo-state rotavirus and
Liqi Zhou +16 more
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Nonlinear ptychographic coherent diffractive imaging [PDF]
, 2016 Ptychographic Coherent diffractive imaging (PCDI) is a significant advance in imaging allowing the measurement of the full electric field at a sample without use of any imaging optics.
Baksh, P. +5 more
core +1 more source