Results 81 to 90 of about 48,622 (298)
Infinite impulse response modal filtering in visible adaptive optics
, 2012 Diffraction limited resolution adaptive optics (AO) correction in visible wavelengths requires a high performance control. In this paper we investigate infinite impulse response filters that optimize the wavefront correction: we tested these algorithms ...
Agapito, G. +4 more
core +1 more source
, 2010 The first science flight of the balloon-borne \Sunrise telescope took place in June 2009 from ESRANGE (near Kiruna/Sweden) to Somerset Island in northern Canada.
A. Feller +62 more
core +4 more sources
Advanced Science, EarlyView.This study employs longitudinal fluorescence imaging in transgenic mice to map post‐craniotomy cortical recovery. We identify distinct neuroimmune recovery phases: microglial structural inflammation peaks at ∼10 days, neuronal structural intensity peaks at ∼14 days and correlates with microglial activity, and functional network modularity is most ...
Guihua Xiao +13 more
wiley +1 more source
Advanced ScienceDetection and anti‐detection with multispectral camouflage are of pivotal importance, while suffer from significant challenges due to the inherent contradiction between detection and anti‐detection and conflict microwave and infrared (IR) stealth ...
Yanzhao Wang +8 more
doaj +1 more source
Real‐Time In Vivo Cellular‐Level Imaging During Puncture
Advanced Science, EarlyView.We present an artificial‐intelligence‐empowered integrative‐light‐field microendoscopy (AIM) needle that delivers real‐time in vivo, diffraction‐limited cellular‐level imaging during puncture and visualizes layered microstructures along the needle path. As a microscopic complement to CT/ultrasound, it improves sampling localization and adds preliminary
Huifang Gao +13 more
wiley +1 more source
Multichannel full-space coding metasurface with linearly-circularly-polarized wavefront manipulation
NanophotonicsAchieving independent multitasked wavefront control by using an ultrathin plate is a challenge to increase information capacity in integration optics and radar applications.
Luo Huiling +8 more
doaj +1 more source
Adaptive Optics for Extremely Large Telescopes
, 2019 Adaptive Optics has become a key technology for the largest ground-based telescopes currently under or close to begin of construction. Adaptive optics is an indispensable component and has basically only one task, that is to operate the telescope at its ...
Hippler, Stefan
core +1 more source
Nonlinear Dielectric Metasurfaces for Wavefront Control
Conference on Lasers and Electro-Optics, 2018 We demonstrate Si-based metasurfaces for third-harmonic generation of an arbitrary wavefront. The nonlinear metasurfaces produce phase gradients within a full 0–2π phase range. We achieve 92% diffraction efficiency of the nonlinear wavefront control.
Lei Wang +5 more
openaire +2 more sources
Miniature Robotic Swimmer with Precise 2D Motion Control via Acoustic Vortex‐Induced Propulsion
Advanced Science, EarlyView.In this work, a miniature robotic swimmer achieves precise 2D motion using sound waves with customized 3D‐printed lenses. Localized acoustic vortices drive both translation and rotation of the swimmer without mechanical parts. This contactless approach offers a novel route to controlled micro‐scale movement, with promising applications in biomedical ...
Chadi Ellouzi +6 more
wiley +1 more source
A Review of Wavefront Sensing and Control Based on Data-Driven Methods
AerospaceOptical systems suffer from wavefront aberrations due to complex atmospheric environments and system component errors, leading to systematic aberrations and significantly degrading optical field quality. Therefore, the detection and correction of optical
Ye Zhang +4 more
doaj +1 more source