Results 11 to 20 of about 887,904 (256)

Influence of Image Processing Method on Wavefront Reconstruction Accuracy of Large-Aperture Laser

Photonics, 2023
In order to improve the wavefront reconstruction accuracy of a large-aperture laser, this paper proposed an adaptive window preprocessing algorithm based on the threshold center of gravity method (AW-TCoG).
Gangyu Wang, Zaihong Hou, Laian Qin, Xu Jing, Yang Li, Yi Wu   +5 more
doaj   +4 more sources

Simulation Analysis of a Wavefront Reconstruction of a Large Aperture Laser Beam [PDF]

Sensors, 2023
In order to solve the problem of atmospheric influence on the far-field measurement of the quality of a laser beam, we proposed a direct wavefront measurement system based on the Hartmann detection principle, which can measure large apertures and high ...
Gangyu Wang, Zaihong Hou, Laian Qin, Xu Jing, Yi Wu   +4 more
doaj   +2 more sources

Wavefront Reconstruction of Shack-Hartmann with Under-Sampling of Sub-Apertures

Photonics, 2023
Shack-Hartmann wavefront sensor plays a key role in adaptive optics (AO) systems, which detect the aberrant wavefront by an array of micro-lenslets across the aperture pupil.
Jian Huang, Lianqun Yao, Shuyun Wu, Gongchang Wang   +3 more
doaj   +3 more sources

Improved Wavefront Reconstruction and Correction Strategy for Adaptive Optics System With a Plenoptic Sensor

IEEE Photonics Journal, 2021
Wavefront reconstruction and correction under strong turbulence has become a crucial issue for adaptive optics systems. An approach using a plenoptic sensor has attracted high attention recently.
Jintian Hu, Tao Chen, Xudong Lin, Liang Wang, Qichang An, Zhichong Wang   +5 more
doaj   +3 more sources

Super-resolution wavefront reconstruction [PDF]

Astronomy & Astrophysics, 2022
Context.Cutting-edge, ground-based astronomical instruments are fed by adaptive optics (AO) systems that are aimed at providing high performance down to the visible wavelength domain on 10 m class telescopes and in the near infrared for the first generation instruments of Extremely Large Telescopes (ELTs).
Sylvain Oberti, Carlos Correia, Thierry Fusco, Benoit Neichel, Pierre Guiraud   +4 more
core   +5 more sources

Quadri-Wave Lateral Shearing Interferogram Outpainting Using QW-GAN for Accurate Wavefront Reconstruction [PDF]

Sensors
This paper proposes a novel outpainting technique for quadri-wave lateral shearing interferograms which employs Quadri-Wave Generative Adversarial Networks (QW-GANs).
Yao Fan, Yaxuan Duan, Yiwen Zhang, Zhengshang Da, Yang Yue   +4 more
doaj   +2 more sources

On-Chip Mid-Infrared Wavefront Sensing Based on Vectorial Photocurrent Manipulation [PDF]

Sensors
Wavefront sensing (WFS) is fundamental to adaptive optics, astronomical observation, biological microscopy, and free-space optical communications. However, conventional approaches—including Shack–Hartmann sensors, shearing interferometers, and transport ...
Tao Ye, Xiaofei He, Jun Ning, Xueling Guo, Xianda Zhang, Ziao Li, Wei Lu, Xiaoshuang Chen, Jing Zhou   +8 more
doaj   +2 more sources

Large dynamic range Shack-Hartmann wavefront sensing based on a graph-theoretic computational model [PDF]

Light: Science & Applications
The Shack-Hartmann wavefront sensor (SHWS) is a widely used non-interferometric wavefront measurement technique. However, for high-slope wavefronts, spot crosstalk and asymmetric distortion cause severe matching ambiguity and centroiding errors.
Lintong Du, Rui Xu, Shuxin Liu, Rongjun Shao, Lin Li, Yuhang Zhang, Ziqiang Li, Yuan Qu, Dapeng Tian, Jiamiao Yang   +9 more
doaj   +2 more sources

WFSuite: a Python software suite for X-ray wavefront sensing and at-wavelength metrology [PDF]

Journal of Synchrotron Radiation
WFSuite is a Python-based software suite for X-ray wavefront sensing and at-wavelength metrology for synchrotron and X-ray free-electron laser applications. It integrates tools for both relative and absolute speckle-based measurements.
Xianbo Shi, Luca Rebuffi, Zhi Qiao, Yu-Chung Lin, Lahsen Assoufid   +4 more
doaj   +2 more sources

Single-shot, reference-less computational wavefront sensing for complex optical fields [PDF]

Light: Science & Applications
Optical waves carry rich information in their spatial profiles and topological structures. Characterization of optical wavefronts is a key prerequisite in broad applications across fundamental research and industrial technologies.
Yunhui Gao, Liangcai Cao, Din Ping Tsai
doaj   +2 more sources