Results 91 to 100 of about 887,904 (256)

Sensorless Wavefront Reconstruction for Extended Solar Imaging Using a Data–Physics Dual-driven Unsupervised Framework

The Astrophysical Journal Supplement Series
Atmospheric turbulence severely degrades the imaging performance of ground-based solar telescopes, while wavefront sensing for extended solar targets remains challenging because target structures are strongly entangled with turbulence-induced aberrations.
Xinlan Ge, Ao Li, Licheng Zhu, Zeyu Gao, Shiqing Ma, Chenye Xiang, Shuai Wang, Ping Yang   +7 more
doaj   +1 more source

Optimization of wavefront reconstruction accuracy for conjugate shift differential absolute testing. [PDF]

Sci Rep, 2022
Zhu X, Wang D, Zhang M, Liu B, Tian A, Jin G, Zheng X.   +6 more
europepmc   +1 more source

Modelling delta-notch perturbations during zebrafish somitogenesis [PDF]

, 2013
The discovery over the last 15 years of molecular clocks and gradients in the pre-somitic mesoderm of numerous vertebrate species has added significant weight to Cooke and Zeeman's ‘clock and wavefront’ model of somitogenesis, in which a travelling ...
Baker, R. E., Maini, P. K., Murray, PJ, Baker, RE, Baker, Ruth E., Murray, Philip J., Maini, PK, Murray, P J, Maini, Philip K.   +8 more
core   +1 more source

Single‐Pulse Femtosecond Laser 3D Multi‐Foci Light‐Field Engineering via Multi‐Layer Noise Threshold Filtering

Advanced Science, EarlyView.
This study presents a single‐pulse femtosecond laser strategy for three‐dimensional multi‐foci light‐field shaping and high‐throughput micro/nano manufacturing. The multi‐layer noise threshold filtering algorithm improves focal quality, while the multi‐layer over‐sampling algorithm increases focal density.
Shouyu Wu, Ruiyang Wang, Lan Jiang, Mengyao Tian, Yongjiu Yuan, Junrui Wu, Liang Zhao, Ruochen Zhang, Ziqian Ning, Xin Li   +9 more
wiley   +1 more source

Fresnel Coherent Diffraction Imaging Without Wavefront Priors

Photonics
Fresnel diffraction plays a critical role in coherent diffraction imaging and holography. Experimental setups for these techniques are often designed based on plane-wave illumination.
Ling Bai, Wen Cao, Yueshu Xu, Cuifang Kuang, Xu Liu   +4 more
doaj   +1 more source

Ptychography retrieval of fully polarized holograms from geometric-phase metasurfaces

Nature Communications, 2020
Controlling light with planar elements requires full polarization channels and reconstruction of optical signals. Here, the authors have demonstrated a general method relying on pixelated metasurfaces that enables wavefront shaping with arbitrary output ...
Qinghua Song, Arthur Baroni, Rajath Sawant, Peinan Ni, Virginie Brandli, Sébastien Chenot, Stéphane Vézian, Benjamin Damilano, Philippe de Mierry, Samira Khadir, Patrick Ferrand, Patrice Genevet   +11 more
doaj   +1 more source

Estimation and Validation of Cardiac Conduction Velocity and Wavefront Reconstruction Using Epicardial and Volumetric Data. [PDF]

IEEE Trans Biomed Eng, 2021
Good WW, Gillette KK, Zenger B, Bergquist JA, Rupp LC, Tate J, Anderson D, Gsell MAF, Plank G, MacLeod RS.   +9 more
europepmc   +1 more source

Terahertz Channel Modeling, Estimation and Localization in RIS‐Assisted Systems

Advanced Electronic Materials, EarlyView.
Reconfigurable intelligent surfaces have become a recent intensive research focus. Based on practical applications, channel strategies for RIS‐assisted terahertz wireless communication systems are categorized into three different types: channel modeling, channel estimation, and channel localization.
Hongjing Wang, Weipeng Wang, Xuan Cong, Shiyu Wang, Gao Li, Sen Gong, Lin Huang, Hongxin Zeng, Yaxin Zhang, Ziqiang Yang   +9 more
wiley   +1 more source

Photonic integrated circuits for astronomy: A formal description of an integrated photonics-based wavefront sensor (IP-WFS)

Astronomy & Astrophysics
Context. Solar wavefront sensing has been a challenge for astrophysical instrumentalists, due to the low contrast between the Sun and the sky background compared to night-time observations, which limits the performance of adaptive optics systems.
Portero-Rodríguez D., García-Vázquez H., Díaz García J. J., Rodríguez Ramos L. F., Gracia Témich F., Aguerri J. Alfonso L.   +5 more
doaj   +1 more source

Holographic Mapping of Orbital Angular Momentum using a Terahertz Diffractive Optical Neural Network

Advanced Intelligent Discovery, EarlyView.
A compact six‐layer diffractive optical neural network enables direct recognition and spatial mapping of terahertz (THz) orbital angular momentum (OAM) beams. Fabricated by 3D printing, the system distinguishes nine OAM modes and their superpositions with high fidelity, good efficiency, and low crosstalk, offering a scalable solution for THz ...
Wei Jia, Miguel Gomez, Steve Blair, Berardi Sensale‐Rodriguez   +3 more
wiley   +1 more source