Results 11 to 20 of about 6,266 (254)

Improvements on speed, stability and field of view in adaptive optics OCT for anterior retinal imaging using a pyramid wavefront sensor. [PDF]

Biomed Opt Express
Brunner E, Kunze L, Laidlaw V, Jodlbauer D, Drexler W, Ramlau R, Pollreisz A, Pircher M.   +7 more
europepmc   +2 more sources

Fuchs' Endothelial Corneal Dystrophy evaluation using a high-resolution wavefront sensor. [PDF]

Sci Rep
Belda-Para C, Velarde-Rodríguez G, Marichal-Hernández JG, Velasco-Ocaña M, Trujillo-Sevilla JM, Alejandre-Alba N, Rodríguez-Ramos JM.   +6 more
europepmc   +2 more sources

Experimental wavefront sensing techniques based on deep learning models using a Hartmann-Shack sensor for visual optics applications [PDF]

Scientific Reports
Wavefront sensing is essential in visual optics for evaluating the optical quality in systems, such as the human visual system, and understanding its impact on visual performance. Although traditional methods like the Hartmann-Shack wavefront sensor (HSS)
Juan Sebastián Ramírez-Quintero, Andres Osorno-Quiroz, Walter Torres-Sepúlveda, Alejandro Mira-Agudelo   +3 more
doaj   +2 more sources

Simulation-based design optimization of the holographic wavefront sensor in closed-loop adaptive optics

Light: Advanced Manufacturing, 2022
Adaptive optics systems are used to compensate for wavefront distortions introduced by atmospheric turbulence. The distortions are corrected by an adaptable device, normally a deformable mirror.
Andreas Zepp, Szymon Gladysz, Karin Stein, Wolfgang Osten   +3 more
doaj   +1 more source

Shack–Hartmann Wavefront Sensing Based on Four-Quadrant Binary Phase Modulation

Photonics, 2022
Aiming at the problem that it is difficult for the conventional Shack–Hartmann wavefront sensor to achieve high-precision wavefront reconstruction with low spatial sampling, a kind of Shack–Hartmann wavefront sensing technology based on four-quadrant ...
Mengmeng Zhao, Wang Zhao, Kangjian Yang, Shuai Wang, Ping Yang, Fengjiao Zeng, Lingxi Kong, Chao Yang   +7 more
doaj   +1 more source

Reinforcement Learning Environment for Wavefront Sensorless Adaptive Optics in Single-Mode Fiber Coupled Optical Satellite Communications Downlinks

Photonics, 2023
Optical satellite communications (OSC) downlinks can support much higher bandwidths than radio-frequency channels. However, atmospheric turbulence degrades the optical beam wavefront, leading to reduced data transfer rates.
Payam Parvizi, Runnan Zou, Colin Bellinger, Ross Cheriton, Davide Spinello   +4 more
doaj   +1 more source

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   +1 more source

CoolMomentum-SPGD Algorithm for Wavefront Sensor-Less Adaptive Optics Systems

Photonics, 2023
Instead of acquiring the previous aberrations of an optical wavefront with a sensor, wavefront sensor-less (WFSless) adaptive optics (AO) systems compensate for wavefront distortion by optimizing the performance metric directly.
Zhiguang Zhang, Yuxiang Luo, Huizhen Yang, Hang Su, Jinlong Liu   +4 more
doaj   +1 more source

Deep and clear optical imaging of thick inhomogeneous samples. [PDF]

PLoS ONE, 2012
Inhomogeneity in thick biological specimens results in poor imaging by light microscopy, which deteriorates as the focal plane moves deeper into the specimen.
Raphael Jorand, Gwénaële Le Corre, Jordi Andilla, Amina Maandhui, Céline Frongia, Valérie Lobjois, Bernard Ducommun, Corinne Lorenzo   +7 more
doaj   +1 more source

Adaptive Optical Closed-Loop Control on the Basis of Hyperparametric Optimization of Convolutional Neural Networks

Applied Sciences, 2023
In adaptive optics systems, the precision wavefront sensor determines the closed-loop correction effect. The accuracy of the wavefront sensor is severely reduced when light energy is weak, while the real-time performance of wavefront sensorless adaptive ...
Bo Chen, Yilin Zhou, Jingjing Jia, Yirui Zhang, Zhaoyi Li   +4 more
doaj   +1 more source