Results 11 to 20 of about 5,982 (227)

Highly Stable Spatio-Temporal Prediction Network of Wavefront Sensor Slopes in Adaptive Optics

Sensors, 2023
Adaptive Optics (AO) technology is an effective means to compensate for wavefront distortion, but its inherent delay error will cause the compensation wavefront on the deformable mirror (DM) to lag behind the changes in the distorted wavefront ...
Ning Wang, Licheng Zhu, Qiang Yuan, Xinlan Ge, Zeyu Gao, Shuai Wang, Ping Yang   +6 more
doaj   +1 more source

Method for distortion correction of multi-layered surface reconstruction using time-gated wavefront sensing approach [PDF]

Journal of the European Optical Society-Rapid Publications, 2013
In order to estimate the multi-layer surface profile and to detect the inter-layer surfaces defects, gated wavefront sensing approach has been proposed in the previous works [1, 2].
Tan C. S., Wang X., Ng Y. H., Lim W. K., Chai T. Y.   +4 more
doaj   +1 more source

Real-Time Correction of a Laser Beam Wavefront Distorted by an Artificial Turbulent Heated Airflow

Photonics, 2022
This paper presents a FPGA-based closed-loop adaptive optical system with a bimorph deformable mirror for correction of the phase perturbation caused by artificial turbulence.
Alexey Rukosuev, Alexander Nikitin, Vladimir Toporovsky, Julia Sheldakova, Alexis Kudryashov   +4 more
doaj   +1 more source

A Single Far-Field Deep Learning Adaptive Optics System Based on Four-Quadrant Discrete Phase Modulation

Sensors, 2020
In adaptive optics (AO), multiple different incident wavefronts correspond to a same far-field intensity distribution, which leads to a many-to-one mapping.
Xuejing Qiu, Tao Cheng, Lingxi Kong, Shuai Wang, Bing Xu   +4 more
doaj   +1 more source

Impact of Pupil Aberrations on Wavefront Manipulation [PDF]

EPJ Web of Conferences, 2021
A systematic and quantitative analysis is given of the impact of pupil aberrations on the imaging performance in wavefront manipulation applications using adaptive optical elements.
Nobis Thomas
doaj   +1 more source

Simulation and experimental investigation on the wavefront correction performance of a dual magnetic connection deformable mirror under high-power laser irradiation

Frontiers in Physics, 2023
Deformable mirrors (DMs) are widely used in high-power laser systems to improve the output beam quality. However, under high-power laser irradiation, the heat accumulates on the DM mirror surface and results in high-power laser induced distortions (LID),
Yamin Zheng, Yamin Zheng, Yongchen Zhuang, Yongchen Zhuang, Shibing Lin, Shibing Lin, Deen Wang, Deen Wang, Yifan Zhang, Yifan Zhang, Lei Huang, Lei Huang   +11 more
doaj   +1 more source

An Efficient Correction Algorithm for Eliminating Image Misalignment Effects on Co-Phasing Measurement Accuracy for Segmented Active Optics Systems. [PDF]

PLoS ONE, 2016
The misalignment between recorded in-focus and out-of-focus images using the Phase Diversity (PD) algorithm leads to a dramatic decline in wavefront detection accuracy and image recovery quality for segmented active optics systems.
Dan Yue, Shuyan Xu, Haitao Nie, Zongyang Wang   +3 more
doaj   +1 more source

Research on BER performance of the OAM-SK FSO communication system with wavefront phase correction

Tongxin xuebao, 2022
On the basis of Gerchberg-Saxton (GS) algorithm and angular-spectrum theory, an improved wavefront phase correction algorithm to the Laguerre-Gaussian (LG) beams was proposed for the orbital angular momentum-shift keying (OAM-SK) modulation-based free ...
Shuang LI, Ping WANG, Tao LIU, Yuting PAN, Wei WANG   +4 more
doaj   +2 more sources

Deep Learning-Based Prediction Algorithm on Atmospheric Turbulence-Induced Wavefront for Adaptive Optics

IEEE Photonics Journal, 2022
Correction performance of an adaptive optics (AO) system is severely limited by its system latency under high temporal frequency distortions. Wavefront prediction methods has been proven to be an effective way to compensate system delay.
Ning Wang, Licheng Zhu, Shuai Ma, Wang Zhao, Xinlan Ge, Zeyu Gao, Kangjian Yang, Shuai Wang, Ping Yang   +8 more
doaj   +1 more source

Effect of Wavefront Distortion on the Performance of Coherent Detection Systems: Theoretical Analysis and Experimental Research

Photonics, 2023
Atmospheric turbulence causes signal beam wavefront distortion at the receiving end of a coherent detection system, which decreases the system mixing efficiency.
Shangjun Yang, Tian Xing, Chenghu Ke, Jingyuan Liang, Xizheng Ke   +4 more
doaj   +1 more source