Results 161 to 170 of about 96,711 (321)

Adaptive wavefront correction in two-photon microscopy using coherence-gated wavefront sensing [PDF]

, 2006
Markus Rueckel, Julia Mack-Bucher, Winfried Denk   +2 more
openalex   +1 more source

Space‐Time‐Modulated Metasurface Enabled High‐Performance Near‐Field Focusing with Enhanced Phase Modulation

Laser &Photonics Reviews, EarlyView.
This study leverages STM technology to enhance NFF performance by enabling continuous phase control at the +1st harmonic without increasing hardware complexity. It overcomes the limitations of conventional 1‐bit TMs caused by phase quantization errors and demonstrates that even compact arrays can achieve effective focusing, highlighting the strong ...
Manting Wang, Dashuang Liao, Chenfeng Yang, Ki Fung Jason Cheng, Man To Yim, Ka Fai Chan, Geng‐Bo Wu, Chi Hou Chan   +7 more
wiley   +1 more source

Wavefront Reconstruction for a Holographic Modal Wavefront Sensor Based on Extreme Learning Machine

IEEE Photonics Journal
The intermodal crosstalk effect as well as the limited dynamic range of holographic modal wavefront sensors (HMWFSs) significantly affect their wavefront-sensing accuracy.
Han Cao, Kainan Yao, Jianli Wang, Minglu Li, Leqiang Yang, Zhiqiang Xu   +5 more
doaj   +1 more source

Study of optimal wavefront sensing with elongated laser guide stars [PDF]

, 2008
Sandrine Thomas, Sean M. Adkins, Donald T. Gavel, Thierry Fusco, V. Michau   +4 more
openalex   +1 more source

A Dual‐Programmable Metasurface with Duplex Beam Steering for Full‐Space Terahertz Communications

Laser &Photonics Reviews, EarlyView.
A dual‐programmable terahertz metasurface enables independent control of transmission and reflection beam steering. It breaks through the limitations in resonant tunability by polarization allocation with 2D‐electron‐gas tuning, enabling a single resonator to incorporate bidirectional operating modes.
Luyang Wang, Feng Lan, Shixiong Liang, Chunyang Bi, Tianyang Song, Dongfang Shen, Munan Yang, Lan Chen, Xuan Cong, Shengxiao Jin, Zhongbo Zhu, Sen Gong, Pinaki Mazumder, Ziqiang Yang, Yaxin Zhang, Tie Jun Cui   +15 more
wiley   +1 more source

Adaptive photoacoustic computed tomography

Photoacoustics, 2021
For many optical imaging modalities, image qualities are inevitably degraded by wavefront distortions caused by varying light speed. In optical microscopy and astronomy, adaptive optics (AO) has long been applied to compensate for such unwanted ...
Manxiu Cui, Hongzhi Zuo, Xunahao Wang, Kexin Deng, Jianwen Luo, Cheng Ma   +5 more
doaj  

Near-infrared wavefront sensing for the VLT interferometer [PDF]

, 2008
S. Hippler, W. Brandner, Y. Clénet, Felix Hormuth, É. Gendron, Thomas Henning, R. Klein, R. Lenzen, Daniel Meschke, V. Naranjo, Udo Neumann, J. R. Ramos, Ralf-Rainer Rohloff, Frank Eisenhauer   +13 more
openalex   +1 more source

Nonlocal Cooperative Behavior, Psychological Effects, and Collective Decision‐Making: An Exemplification With Predator–Prey Models

Mathematical Methods in the Applied Sciences, EarlyView.
ABSTRACT In bio‐social models, cooperative behavior has evolved as an adaptive strategy, playing multi‐functional roles. One of such roles in populations is to increase the success of the survival and reproduction of individuals and their families or social groups.
Sangeeta Saha, Swadesh Pal, Roderick Melnik   +2 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

Fast single pixel modal wavefront sensing using neural networks [PDF]

arXiv
Dynamic wavefront aberrations negatively impact a wide range of optical applications including astronomy, optical free-space telecommunications and bio-imaging. Wavefront errors can be compensated by an adaptive optics system comprised of a deformable mirror and wavefront sensor connected by a control loop. For satellite optical communications (SatCom),
arxiv