Results 11 to 20 of about 297,164 (259)
Quantum imaging by coherent enhancement [PDF]
Physical Review Letters, 2014 Conventional wisdom dictates that to image the position of fluorescent atoms or molecules, one should stimulate as much emission and collect as many photons as possible.
Chuang, Isaac L. +2 more
core +6 more sources
Nonlinear ptychographic coherent diffractive imaging [PDF]
Optics Express, 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 +7 more sources
Deterministic Bragg Coherent Diffraction Imaging [PDF]
Scientific Reports, 2017 A deterministic variant of Bragg Coherent Diffraction Imaging is introduced in its kinematical approximation, for X-ray scattering from an imperfect crystal whose imperfections span no more than half of the volume of the crystal. This approach provides a
Konstantin M. Pavlov +4 more
doaj +4 more sources
In situ coherent diffractive imaging [PDF]
Nature Communications, 2018 Coherent diffractive imaging (CDI) allows for high resolution imaging without lenses. Here, Lo et al. develop in situ CDI with real-time imaging and a corresponding low-dose requirement, with expected applications in the physical and life sciences.
Yuan Hung Lo +7 more
doaj +6 more sources
An Experimental Ultrasound System for Qualitative Tomographic Imaging
Sensors, 2022 The advancement of new promising techniques in the field of biomedical imaging has always been paramount for the research community. Recently, ultrasound tomography has proved to be a good candidate for non-invasive and safe diagnostics.
Michele Ambrosanio +4 more
doaj +1 more source
A Light-Ray Approach to Fractional Fourier Optics
Fractal and Fractional, 2023 A light ray in space is characterized by two vectors: (i) a transverse spatial vector associated with the point where the ray intersects a given spherical cap; (ii) an angular-frequency vector which defines the ray direction of propagation. Given a light
Éric Fogret, Pierre Pellat-Finet
doaj +1 more source
THz coherent lensless imaging [PDF]
Applied Optics, 2019 Imaging with THz radiation has proved an important tool for both fundamental science and industrial use. Here we review a class of THz imaging implementations, named coherent lensless imaging, that reconstruct the coherent response of arbitrary samples with a minimized experimental setup based only on a coherent source and a camera.
Lorenzo Valzania +6 more
openaire +3 more sources
Enhancement of Partially Coherent Diffractive Images Using Generative Adversarial Network
AI, 2022 We present a deep learning-based generative model for the enhancement of partially coherent diffractive images. In lensless coherent diffractive imaging, a highly coherent X-ray illumination is required to image an object at high resolution.
Jong Woo Kim +2 more
doaj +1 more source
Coherent Imaging without Phases [PDF]
SIAM Journal on Imaging Sciences, 2016 In this paper we consider narrow band, active array imaging of weak localized scatterers when only the intensities are recorded at an array with N transducers. We consider that the medium is homogeneous and, hence, wave propagation is fully coherent.
Moscoso, Miguel +2 more
openaire +3 more sources
When holography meets coherent diffraction imaging [PDF]
, 2012 Modern imaging techniques at the molecular scale rely on utilizing novel coherent light sources like X-ray free electron lasers for the ultimate goal of visualizing such objects as individual biomolecules rather than crystals. Here, unlike in the case of
Barakat +60 more
core +1 more source