Results 41 to 50 of about 843 (178)

INSCRIPTION PROCESS RESEARCH AND OPTIMIZATION FOR SUPERIMPOSED FIBER BRAGG GRATINGS [PDF]

Научно-технический вестник информационных технологий, механики и оптики, 2017
Subject of Research. The paper presents the study of inscription process distinctive features for superimposed fiber Bragg gratings. We analyzed spectral characteristics changes of superposition segregated gratings that appear during inscription of ...
Kirill A. Konnov, Yulia I. Slozhenikina, Alexey I. Gribaev, Sergey V. Varzhel , Victoria A. Novikova, Yulia K. Zalesskaya, Andrey A. Dmitriev   +6 more
doaj   +1 more source

Optical properties of in situ eye lenses measured with X-ray Talbot interferometry: a novel measure of growth processes. [PDF]

PLoS ONE, 2011
The lens, a major optical component of the eye, has a gradient refractive index, which is required to provide sufficient refractive power and image quality.
Masato Hoshino, Kentaro Uesugi, Naoto Yagi, Satoshi Mohri, Justyn Regini, Barbara Pierscionek   +5 more
doaj   +1 more source

Development of x-ray phase tomographic microscope based on Talbot interferometer at BL37XU, SPring-8

AIP Advances, 2020
An x-ray phase tomographic microscope has been developed by optimizing the optical system for 9-keV synchrotron x rays at BL37XU, SPring-8, Japan. The system consists of a full-field x-ray imaging microscope and a Talbot interferometer.
Hidekazu Takano, Yanlin Wu, Masato Hoshino, Karol Vegso, Koh Hashimoto, Koichi Matsuo, Atsushi Momose   +6 more
doaj   +1 more source

Comparison of Thermal Neutron and Hard X-ray Dark-Field Tomography

Journal of Imaging, 2020
High visibility (0.56) neutron-based multi-modal imaging with a Talbot–Lau interferometer at a wavelength of 1.6 Å is reported. A tomography scan of a strongly absorbing quartz geode sample was performed with both the neutron and an X-ray grating ...
Alex Gustschin, Tobias Neuwirth, Alexander Backs, Manuel Viermetz, Nikolai Gustschin, Michael Schulz, Franz Pfeiffer   +6 more
doaj   +1 more source

A momentum filter for atomic gas

New Journal of Physics, 2013
We propose and demonstrate a momentum filter for atomic gas-based on a designed Talbot–Lau interferometer. It consists of two identical optical standing-wave pulses separated by a delay equal to odd multiples of the half Talbot time.
Wei Xiong, Xiaoji Zhou, Xuguang Yue, Yueyang Zhai, Xuzong Chen   +4 more
doaj   +1 more source

Fabrication of X-ray absorption gratings by centrifugal deposition of bimodal tungsten particles in high aspect ratio silicon templates

Scientific Reports, 2022
Grating-based X-ray imaging employs high aspect ratio absorption gratings to generate contrast induced by attenuating, phase-shifting, and small-angle scattering properties of the imaged object.
Simon Pinzek, Alex Gustschin, Nikolai Gustschin, Manuel Viermetz, Franz Pfeiffer   +4 more
doaj   +1 more source

Unique interpretation of Talbot Bands and Fourier domain white light interferometry [PDF]

, 2007
A theoretical model is developed to interpret the output of the diffraction grating spectrometer used to analyze the channelled spectrum produced by a low coherence interferometer set-up.
Podoleanu, Adrian G.H., Adrian Gh. Podoleanu   +1 more
core   +1 more source

Phase-Contrast and Dark-Field Imaging

Journal of Imaging, 2018
Very early, in 1896, Wilhelm Conrad Röntgen, the founding father of X-rays, attempted to measure diffraction and refraction by this new kind of radiation, in vain. Only 70 years later, these effects were measured by Ulrich Bonse and Michael Hart who
Simon Zabler
doaj   +1 more source

Progress toward a large-scale ion Talbot-Lau interferometer

, 2017
International audienceThe Talbot-Lau interferometer is a proven tool to perform measurements in the near-field regime. It has been extensively used for investigating the wave nature of electrons, atoms, and complex organic molecules.
Oberthaler, Markus K., Andrea Demetrio, Müller, Simon R., Simon R. Müller, Lansonneur, Pierre, Markus K. Oberthaler, Pierre Lansonneur, Demetrio, Andrea   +7 more
core   +1 more source

TIA: A forward model and analyzer for Talbot interferometry experiments of dense plasmas [PDF]

, 2022
Producción CientíficaInterferometry is one of the most sensitive and successful diagnostic methods for plasmas. However, owing to the design of most common interferometric systems, the wavelengths of operation and, therefore, the range of densities and ...
Pérez Callejo, Gabriel, T. Goudal, M. P. Valdivia, A. Casner, Casner, A., L. Ceurvorst, Bouffetier, V., Ceurvorst, L., Valdivia, M. P., Stutman, D., D. Stutman, V. Bouffetier, G. Pérez-Callejo, Goudal, T.   +13 more
core   +1 more source