Results 61 to 70 of about 93,717 (313)

Interferometric Wavefront Sensing System Based on Deep Learning

Applied Sciences, 2020
At present, most wavefront sensing methods analyze the wavefront aberration from light intensity images taken in dark environments. However, in general conditions, these methods are limited due to the interference of various external light sources.
Yuhao Niu, Zhan Gao, Chenjia Gao, Jieming Zhao, Xu Wang   +4 more
doaj   +1 more source

Single-Shot Wavefront Sensing in Focal Plane Imaging Using Transformer Networks

Optics
Wavefront sensing is an essential technique in optical imaging, adaptive optics, and atmospheric turbulence correction. Traditional wavefront reconstruction methods, including the Gerchberg–Saxton (GS) algorithm and phase diversity (PD) techniques, are ...
Hangning Kou, Jingliang Gu, Jiang You, Min Wan, Zixun Ye, Zhengjiao Xiang, Xian Yue   +6 more
doaj   +1 more source

Accounting for Polychromatic Light in Virtual Shack-Hartmann Wavefront Sensing

Photonic Sensors, 2023
Virtual Shack-Hartmann wavefront sensing (vSHWS) has some significant advantages and is promising for aberration measurement in the field of biomedical optical imaging.
Xian Yue, Yaliang Yang, Hao Dai, Shen Chen, Chao Geng, Yudong Zhang   +5 more
doaj   +1 more source

Focal plane wavefront sensing on SUBARU/SCExAO [PDF]

, 2020
Focal plane wavefront sensing is an elegant solution for wavefront sensing since near-focal images of any source taken by a detector show distortions in the presence of aberrations.
Bonnefois, Aurélie, Bos, Steven,, Cassaing, Frédéric, Currie, Thayne, Deo, Vincent, Guyon, Olivier, Jovanovic, Nemanja, Keller, Christoph,, Lamb, Masen, Lopez, Coline, Lozi, Julien, Martinache, Frantz, Mary, D, Miller, Kelsey, Montmerle-Bonnefois, A, Mugnier, Laurent,, N'Diaye, Mamadou, Norris, Barnaby, Sahoo, Ananya, Sauvage, J-F, Sauvage, Jean-Francois, Skaf, Nour, Snik, Frans, Vievard, Sébastien, Wilby, Michael,, Wong, Alison   +25 more
core   +3 more sources

Integrated Wavefront Sensing and Processing Method Utilizing Optical Neural Network

Photonics
Wavefront sensors and processors are vital components of adaptive optical (AO) systems, directly impacting the operating bandwidth. As application scenarios become increasingly complex, AO systems are confronted with more extreme atmospheric turbulence ...
Gang Luo, Yuanchao Geng, Deen Wang, Qiang Yuan, Dongxia Hu, Wanguo Zheng   +5 more
doaj   +1 more source

Wavefront sets and descent method for finite symplectic groups [PDF]

arXiv, 2022
In \cite{JZ1}, D. Jiang and L. Zhang proposed a conjecture which related the wavefront sets and the descent method in the local fields case. Recently, in \cite{JLZ}, they and D. Liu define the arithmetic wavefront set of certain irreducible admissible representation $\pi$ of a classical group $G(k)$ defined over local field $k$, which is a subset of $k$
arxiv  

Wavefront sensing of atmospheric phase distortions at the Palomar 200-in. telescope and implications for adaptive optics [PDF]

, 1997
Major efforts in astronomical instrumentation are now being made to apply the techniques of adaptive optics to the correction of phase distortions induced by the turbulent atmosphere and by quasi-static aberrations in telescopes themselves.
Bloemhof, E. E., Ewald, S. P., Westphal, J. A.   +2 more
core   +1 more source

Scalable Lithium Niobate Nanoimprinting for Nonlinear Metalenses

Advanced Materials, EarlyView.
A broadband polycrystalline lithium niobate platform is developed for highly versatile and scalable fabrication of nonlinear metasurfaces. This work demonstrates simultaneous second harmonic generation and wavefront‐shaping via a metalens on this platform.
Ülle‐Linda Talts, Helena Weigand, Irene Occhiodori, Rachel Grange   +3 more
wiley   +1 more source

Training networks without wavefront label for pixel-based wavefront sensing

Frontiers in Physics
Traditional image-based wavefront sensing often faces challenges in efficiency and stagnation. Deep learning methods, when properly trained, offer superior robustness and performance.
Yuxuan Liu, Yuxuan Liu, Yuxuan Liu, Xiaoquan Bai, Xiaoquan Bai, Boqian Xu, Boqian Xu, Chunyue Zhang, Chunyue Zhang, Yan Gao, Yan Gao, Shuyan Xu, Shuyan Xu, Guohao Ju, Guohao Ju   +14 more
doaj   +1 more source

Binary Amplitude Reflection Gratings for X-ray Shearing and Hartmann Wavefront Sensors

Sensors, 2021
New, high-coherent-flux X-ray beamlines at synchrotron and free-electron laser light sources rely on wavefront sensors to achieve and maintain optimal alignment under dynamic operating conditions. This includes feedback to adaptive X-ray optics.
Kenneth A. Goldberg, Antoine Wojdyla, Diane Bryant   +2 more
doaj   +1 more source