Results 141 to 150 of about 2,243,893 (300)
Small, EarlyView.ABSTRACT Generating pre‐designed vectorial beams via on‐chip devices can yield many fascinating applications, but traditional diffraction‐based devices are bulky and inefficient. While plasmonic metasurfaces exhibit ultra‐compact sizes and deep‐subwavelength resolutions, their working efficiencies are limited by metallic losses.
Yu He +8 more
wiley +1 more source
Wavefront sensor based on modified Talbot effect [PDF]
, 2015 Wavefront measurements are important in many fields of applied optics such as wavefront control of laser beams, optical diagnostics of the surface, human-eye aberration measurements, etc.
Bichra, Mohamed +2 more
core
Structural, Compositional, and Dielectric State Profiling in Label‐Free Single‐Cell Monitoring
Small Methods, EarlyView.Label‐free single‐cell monitoring leverages distinct physical interactions to access structural, compositional, and dielectric states of cells, enabling non‐perturbative, repeatable, and information‐rich measurements across diverse biological contexts. This review organizes representative platforms by intrinsic state variables and connects measurement ...
Changi Baek +6 more
wiley +1 more source
High Voltage, EarlyView.ABSTRACT To effectively suppress transient overvoltages in HVDC systems, the design and experimental validation of a multi‐module series controllable arrester are presented. The voltage‐limiting performance, series voltage equalisation capability, and robustness under fault conditions in high‐voltage scenarios require further research.
Tai Yang +4 more
wiley +1 more source
Improved image reconstruction in coherent diffraction imaging using self‐seeded XFEL pulses
Journal of Synchrotron Radiation, EarlyView.This study demonstrates that the superior coherence of narrow‐bandwidth self‐seeded X‐ray pulses significantly improves the quality and reliability of image reconstruction in coherent diffraction imaging compared with conventional broad‐bandwidth SASE pulses.
Jaeyong Shin +7 more
wiley +1 more source
'Shack-Hartmann Wavefront Sensor based on an Industrial Smart Camera
, 2012 Wavefront sensing is important in many optical measurement systems and adaptive optics. The speed of the wavefront sensor determines the achievable temporal resolution of dynamic measurements and the bandwidth of adaptive optics systems.
Paris, René +3 more
core
Shaped electrodes for adaptive X‐ray optics
Journal of Synchrotron Radiation, EarlyView.For adaptive X‐ray optics on high‐performance beamline optical systems, we describe an approach to mirror figure and slope control using patterned, shaped electrodes to control the local curvature on a lithium niobate substrate from a single applied voltage. Longitudinally continuous electrode patterns achieve target shapes without discontinuities, and
Kenneth A. Goldberg +2 more
wiley +1 more source
Objective quantification and spatial mapping of cataract with a Shack-Hartmann wavefront sensor. [PDF]
Sci Rep, 2020 Holló CT +7 more
europepmc +1 more source
Fast eikonal phase retrieval for high‐throughput beamlines
Journal of Synchrotron Radiation, EarlyView.Fast eikonal phase retrieval with complementary local (sub‐pixel) and non‐local (multi‐pixel) solvers strongly suppresses nonlinear streak artefacts in long‐distance propagation‐based phase‐contrast micro‐tomography at high computational efficiency.A fast eikonal phase retrieval formulation is introduced that accelerates eikonal phase retrieval by more
Alessandro Mirone +5 more
wiley +1 more source
Air attenuation of high power XFEL beams
Journal of Synchrotron Radiation, EarlyView.The transmission of air, which is used to contain X‐ray beams for radiation safety, is observed to significantly increase with X‐ray power.The Linac Coherent Light Source II, a high‐repetition‐rate X‐ray free‐electron laser (FEL), produces high average power as well as high peak power.
Philip Heimann +11 more
wiley +1 more source