Results 31 to 40 of about 2,076,692 (292)
Compressive Direct Imaging of a Billion-Dimensional Optical Phase-Space [PDF]
, 2018 Optical phase-spaces represent fields of any spatial coherence, and are typically measured through phase-retrieval methods involving a computational inversion, interference, or a resolution-limiting lenslet array.
Howell, John C. +3 more
core +3 more sources
Near-Field 3D Sparse SAR Direct Imaging with Irregular Samples
Remote Sensing, 2022 Sparse imaging is widely used in synthetic aperture radar (SAR) imaging. Compared with the traditional matched filtering (MF) methods, sparse SAR imaging can directly image the scattered points of a target and effectively reduce the sidelobes and clutter
Shiqi Xing +5 more
doaj +1 more source
Direct absorption imaging of ultracold polar molecules
, 2010 We demonstrate a scheme for direct absorption imaging of an ultracold ground-state polar molecular gas near quantum degeneracy. A challenge in imaging molecules is the lack of closed optical cycling transitions.
B. Neyenhuis +8 more
core +1 more source
WEIRD: Wide-orbit Exoplanet search with InfraRed Direct imaging [PDF]
, 2018 We report results from the Wide-orbit Exoplanet search with InfraRed Direct imaging (WEIRD), a survey designed to search for Jupiter-like companions on very wide orbits (1000 to 5000 AU) around young stars ($
Albert, Loïc +11 more
core +6 more sources
High-Contrast Imaging: Hide and Seek with Exoplanets
GalaxiesSo far, most of the about 5700 exoplanets have been discovered mainly with radial velocity and transit methods. These techniques are sensitive to planets in close orbits, not being able to probearge star–planet separations.
Riccardo Claudi, Dino Mesa
doaj +1 more source
Direct electric field imaging of graphene defects
Nature Communications, 2018 Imaging chemical bonding states in defective graphene is important to determine its functional properties. Here, the authors report triangular and rectangular atomic electric fields in monolayer graphene induced by silicon as imaged by differential phase
Ryo Ishikawa +6 more
doaj +1 more source
A new sub-stellar companion around the young star HD 284149
, 2014 Even though only a handful of sub-stellar companions have been found via direct imaging, each of these discoveries has had a tremendous impact on our understanding of the star formation process and the physics of cool atmospheres.
Bonavita, Mariangela +5 more
core +1 more source
Technical Points and Imaging Parameters of CT Lymphangiography
CT Lilun yu yingyong yanjiu, 2022 CT lymphangiography (CTL) is a multimodal imaging method combining direct lymphangiography (DLG) and MSCT. It is an important imaging technology for the diagnosis of lymphatic reflux disorders.
Wei FAN +5 more
doaj +1 more source
Direct imaging of domain-wall interactions in Ni80Fe20 planar nanowires [PDF]
, 2010 We have investigated magnetostatic interactions between domain walls in Ni80Fe20 planar nanowires using magnetic soft x-ray microscopy and micromagnetic simulations.
Allwood, D.A. +7 more
core +1 more source
PhotonicsThis article presents a novel approach to actively compensate wavefront errors in both phase and amplitude using a Liquid Crystal Spatial Light Modulator (LC-SLM) for direct exoplanet imaging.
Andrey Yudaev +5 more
doaj +1 more source