Results 21 to 30 of about 1,387 (173)
Optofluidic ptychography on a chip
Lab on a Chip, 2021 We demonstrate high-resolution ptychographic imaging in a flow cytometer configuration. The device complements the miniaturization provided by microfluidics and allows the integration of ptychographic microscopy into various lab-on-a-chip systems.
Pengming Song +8 more
openaire +3 more sources
Ptychography at the carbon K-edge
Communications Materials, 2022 Ptychography is an imaging technique based on algorithmic reconstruction of diffraction patterns that improves the spatial resolution of scanning transmission X-ray microscopy. Here, the possibility of ptychography at the carbon K-edge is demonstrated on
Nicolas Mille +8 more
doaj +1 more source
Ten implementations of ptychography [PDF]
Journal of Microscopy, 2017 SummaryPtychography is an increasingly popular phase retrieval imaging technique, able to routinely deliver quantitative phase images with extended field of view at diffraction limited resolution. Different variants of this technique, like Bragg ptychography and Fourier ptychography, have also been developed and applied to various fields.
Li, P., Maiden, A.M.
openaire +3 more sources
Snapshot ptychography on array cameras
Optics Express, 2022 We use convolutional neural networks to recover images optically down-sampled by 6.7 × using coherent aperture synthesis over a 16 camera array. Where conventional ptychography relies on scanning and oversampling, here we apply decompressive neural estimation to recover full resolution image from a single snapshot, although as shown in simulation ...
Chengyu Wang +4 more
openaire +3 more sources
IEEE Photonics Journal, 2023 Fourier ptychography (FP) is a computational imaging technique with the advantage that it can obtain large field-of-view (FOV) and high-resolution (HR) imaging.
Baopeng Li +6 more
doaj +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
Deep reinforcement learning for data-driven adaptive scanning in ptychography
Scientific Reports, 2023 We present a method that lowers the dose required for an electron ptychographic reconstruction by adaptively scanning the specimen, thereby providing the required spatial information redundancy in the regions of highest importance. The proposed method is
Marcel Schloz +6 more
doaj +1 more source
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
doaj +1 more source
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
doaj +1 more source