Results 21 to 30 of about 30,667 (264)

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

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

Ground-layer wavefront reconstruction from multiple natural guide stars [PDF]

, 2007
Observational tests of ground layer wavefront recovery have been made in open loop using a constellation of four natural guide stars at the 1.55 m Kuiper telescope in Arizona.
Athey A., Baranec C., Casali M., Christoph Baranec, Egner S. E., Ellerbroek B. L., Ellerbroek B. L., Fabricant D., Johns M., Le Louarn M., Lloyd-Hart M., Lloyd-Hart M., Michael Lloyd‐Hart, Morris T. J., N. Mark Milton, Stoesz J., Szeto K., Velur V.   +17 more
core   +3 more sources

Non-common Path Aberration Correction in an Adaptive Optics Scanning Ophthalmoscope [PDF]

, 2014
The correction of non-common path aberrations (NCPAs) between the imaging and wavefront sensing channel in a confocal scanning adaptive optics ophthalmoscope is demonstrated.
Dubra, Alfredo, Sulai, Yusufu N.
core   +2 more sources

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

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

Focusing and Compression of Ultrashort Pulses through Scattering Media [PDF]

, 2011
Light scattering in inhomogeneous media induces wavefront distortions which pose an inherent limitation in many optical applications. Examples range from microscopy and nanosurgery to astronomy.
A Assion, A Derode, AM Weiner, BA Wilt, BJ Pearson, BK Andrasfalvy, C-L Hsieh, D Oron, D Oron, D Yelin, E Small, E Tal, Eran Small, F Lemoult, G Lerosey, H Rabitz, H Szmacinski, IM Vellekoop, IM Vellekoop, IM Vellekoop, IM Vellekoop, IM Vellekoop, J Aulbach, JC Diels, JM Dela Cruz, JW Goodman, M Aeschlimann, M Cui, M Fink, M Oheim, M Rueckel, MA Webster, MI Stockman, MJ Booth, NC Bruce, Ori Katz, P Sebbah, PM Johnson, RK Tyson, S Popoff, SM Popoff, T Čižmár, W Denk, Y Jiang, Yaron Bromberg, Yaron Silberberg, Z Yaqoob   +46 more
core   +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

Fast holographic scattering compensation for deep tissue biological imaging

Nature Communications, 2021
Wavefront shaping is used to overcome scattering in biological tissues during imaging, but determining the compensation is slow. Here, the authors use holographic phase stepping interferometry, where new phase information is updated after each ...
Molly A. May, Nicolas Barré, Kai K. Kummer, Michaela Kress, Monika Ritsch-Marte, Alexander Jesacher   +5 more
doaj   +1 more source

A Local Threshold Checkerboard Algorithm for Adaptive Optics System With a Plenoptic Sensor

IEEE Photonics Journal, 2022
Adaptive optics systems will encounter challenges under strong atmospheric turbulence conditions. Recently, a modified approach based on plenoptic sensor has attracted considerable attention.
Zhichong Wang, Tao Chen, Xudong Lin, Liang Wang, Qichang An, Jintian Hu   +5 more
doaj   +1 more source