Results 21 to 30 of about 3,149 (205)

Development of electron source feedback for enhanced X-ray beam stability at NSLS-II. [PDF]

J Synchrotron Radiat
An electron‐source feedback method has been demonstrated at the NSLS‐II Hard X‐ray Nanoprobe, using X‐ray beam position data to drive electron beam corrections. The approach suppresses dominant vibration peaks and significantly improves X‐ray beam stability and ptychographic image quality.Future synchrotron light sources are being designed to deliver ...
Kongtawong S, Hidaka Y, Yan H, Wang G, Ha K, Tian Y, Mead J, Padrazo D, Chu Y, Shaftan T.   +9 more
europepmc   +2 more sources

Acousto-optic ptychography

Optica, 2021
Acousto-optic imaging (AOI) enables optical-contrast imaging deep inside scattering samples via localized ultrasound-modulation of scattered light. While AOI allows optical investigations at depths, its imaging resolution is inherently limited by the ultrasound wavelength, prohibiting microscopic investigations. Here, we propose a computational imaging
Rosenfeld, Moriya, Weinberg, Gil, Doktofsky, Daniel, Li, Yunzhe, Tian, Lei, Katz, Ori   +5 more
openaire   +2 more sources

Total-reflection-based microscope compatible with X-ray and visible light for sample positioning. [PDF]

J Synchrotron Radiat
A total‐reflection‐based microscope compatible with X‐rays and visible light for sample positioning without difficult calibration of the system is introduced.Sample positioning in X‐ray imaging is often technically demanding and involves radiation exposure to the sample.
Yoshinaga K, O'Neal JT, Sakurai K, Egawa S, Furuya N, Shimamura T, Takeo Y, Nakata Y, Nagayama Y, Kishimoto H, Senba Y, Shimura M, Kodama T, Yabashi M, Ohashi H, Kimura T.   +15 more
europepmc   +2 more sources

Single-shot ptychography at a soft X-ray free-electron laser

Scientific Reports, 2022
In this work, single-shot ptychography was adapted to the XUV range and, as a proof of concept, performed at the free-electron laser FLASH at DESY to obtain a high-resolution reconstruction of a test sample. Ptychography is a coherent diffraction imaging
Konstantin Kharitonov, Masoud Mehrjoo, Mabel Ruiz-Lopez, Barbara Keitel, Svea Kreis, Seung-gi Gang, Rui Pan, Alessandro Marras, Jonathan Correa, Cornelia B. Wunderer, Elke Plönjes   +10 more
doaj   +1 more source

Sensor Fusion in Ptychography

Optica Advanced Photonics Congress 2022, 2022
We present a ptychography method to fuse data from two image sensors capturing different parts of the diffraction patterns and thereby extending the numerical aperture.
Kira Maathuis, Jacob Seifert, Allard P. Mosk   +2 more
openaire   +3 more sources

Direct observation of Cu in high-silica chabazite zeolite by electron ptychography using Wigner distribution deconvolution

Scientific Reports, 2023
Direct observation of Cu in Cu-chabazite (CHA) zeolite has been achieved by electron ptychography using the Wigner distribution deconvolution. The imaging properties of ptychographically reconstructed images were evaluated by comparing the intensities of
Kazutaka Mitsuishi, Katsuaki Nakazawa, Ryusuke Sagawa, Masahiko Shimizu, Hajime Matsumoto, Hisashi Shima, Takahiko Takewaki   +6 more
doaj   +1 more source

Reflective Fourier ptychography [PDF]

Journal of Biomedical Optics, 2016
The Fourier ptychography technique in reflection mode has great potential applications in tissue imaging and optical inspection, but the current configuration either has a limitation on cut-off frequency or is not practical. By placing the imaging aperture stop outside the illumination path, the illumination numerical aperture (NA) can be greater than ...
Shaun, Pacheco, Guoan, Zheng, Rongguang, Liang   +2 more
openaire   +2 more sources

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, Chengfei Guo, Shaowei Jiang, Tianbo Wang, Patrick Hu, Derek Hu, Zibang Zhang, Bin Feng, Guoan Zheng   +8 more
openaire   +3 more sources

Ptychography in anisotropic media [PDF]

Optics Letters, 2015
This letter describes ptychography in the context of polarized light probing anisotropic specimen (i.e., showing properties of birefringence and/or diattenuation). We established an optimization strategy using a vectorial formalism. We propose a measurement scheme using a set of linearly polarized probes and linear polarization analyzers, which allows ...
Patrick, Ferrand, Marc, Allain, Virginie, Chamard   +2 more
openaire   +2 more sources

Electrons and X-rays for diffraction and imaging. [PDF]

Acta Crystallogr D Struct Biol
The use of X‐rays and electrons for diffraction and imaging of soft biological samples is compared.A comparison is provided between the use of electrons and X‐rays for collecting diffraction data from small protein crystals and imaging data from cells and tissues.
Nave C, Nunes P, Siebert A.
europepmc   +2 more sources