Results 141 to 150 of about 6,501 (284)

Wavefront curvature sensing and control in microscopy [PDF]

, 2016
The purposes are multiples: creation of a wavefront curvature sensor, use of the curvature sensing to control a multi-actuator lens developed at CNR-IFN of Padua (18 piezoelectric actuators) and use of the multi-actuator lens to generate an astigmatic ...
Dalle Rive, Gianluca
core  

Insights From the Alphasat Aldo Paraboni Experiment at Tito Scalo and Spino d'Adda: Characterizing Scintillation and Rain Attenuation at Ka‐ and Q‐Band Frequencies

International Journal of Satellite Communications and Networking, EarlyView.
ABSTRACT We present experimental results on the relationship between rain attenuation and simultaneous scintillation during rain events, based on beacon signal measurements at 19.7 (Ka‐band) and 39.4 GHz (Q‐band) from the geosynchronous Alphasat satellite (25° E), received at two Italian ground stations, Spino d'Adda (42.1° slant path) and Tito Scalo ...
Miles Turner, Alef Comisso, Carlo Riva, Lorenzo Luini, Giuseppe Codispoti, Giorgia Parca   +5 more
wiley   +1 more source

A Framework for Iterative Phase Retrieval Technique Integration into Atmospheric Adaptive Optics—Part I: Wavefront Sensing in Strong Scintillations

Photonics
The objective of this study, which is divided into two parts, is twofold: to address long-standing challenges in the sensing of atmospheric turbulence-induced wavefront aberrations under strong scintillation conditions via a comparative analysis of ...
Mikhail A. Vorontsov, Ernst Polnau
doaj   +1 more source

High‐Efficiency Generation of Vectorial Terahertz Beams via Surface‐Wave‐Excited Dielectric Metasurfaces

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, Yuanxi Liu, Yao Yao, Qingnan Cai, Dumeng Zhang, Xiangyu Jin, Shulin Sun, Zhuo Wang, Lei Zhou   +8 more
wiley   +1 more source

Deep Denoising of Wavefront Sensor Signals via Physics-Aware Dual-Channel Decoupled Network (PRISM)

Sensors
Laser remote sensing based on wavefront sensors shows great potential for detecting minute vibrations. However, due to their high detection sensitivity, wavefront sensors are highly susceptible to interference from environmental noise and instrument ...
Jianbao Ma, Yun Pan, Yiyou Fan, Hao Wang, Jinshan Su   +4 more
doaj   +1 more source

Closed-loop wavefront sensing and correction in the mouse brain with computed optical coherence microscopy. [PDF]

Biomed Opt Express, 2021
Liu S, Xia F, Yang X, Wu M, Bizimana LA, Xu C, Adie SG.   +6 more
europepmc   +1 more source

Optical Wavefront Sensing

SPG Mitteilungen - Communications de la SSP, series "Physics Anecdotes and Personal Recollections", Article ...
openaire   +1 more source

Wavefront sensing for solar AO and MCAO

, 2015
One major disadvantage to ground based observations is the distortion of light as it enters the Earth's atmosphere. One way to overcome this is to send telescopes into space to avoid the effects of the atmosphere completely.
Brown, Nathan Tatsuya
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, Youngho Song, Seongcheol Park, Sujin Hyung, Sang Eun Yoon, Yong Jae Shin, Soo‐Yeon Cho   +6 more
wiley   +1 more source

Complex wavefront sensing based on coherent diffraction imaging using vortex modulation. [PDF]

Sci Rep, 2021
Li R, Cao L.
europepmc   +1 more source