Results 21 to 30 of about 15,284 (261)

A Global Decoupling Control Algorithm for LC-DM Adaptive Optics System

IEEE Access, 2021
The liquid crystal (LC) and deformable mirror (DM) cascaded adaptive optics (AO) system can be used to effectively extend the imaging waveband of a large aperture telescope from the infrared to the visible waveband. However, to maintain the effectiveness
Yukun Wang, Xingyun Zhang, Dayu Li, Quanquan Mu, Li Xuan   +4 more
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A Real-Time Measurement System for Atmospheric Turbulence Intensity and Distribution Based on the GLAO System

Applied Sciences, 2023
Measuring the intensity and distribution of atmospheric optical turbulence at large-aperture astronomical telescope sites is crucial to optimizing turbulence correction for different layers.
Xian Ran, Lanqiang Zhang, Hua Bao, Xuejun Rao, Jinsheng Yang, Dingkang Tong, Cheng Wang, Changhui Rao   +7 more
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Reconstruction of wavefront distorted by atmospheric turbulence using a Shack-Hartman sensor [PDF]

Компьютерная оптика, 2019
The reconstruction of a wave front containing random phase distortions of the light field is considered. The reconstruction is performed by a Hartmann method based on the approximation of the wave function by Zernike polynomials using estimates of local ...
Vitaly Lavrinov, Lidiya Lavrinova
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High-speed adaptive optics line scan confocal retinal imaging for human eye. [PDF]

PLoS ONE, 2017
PURPOSE:Continuous and rapid eye movement causes significant intraframe distortion in adaptive optics high resolution retinal imaging. To minimize this artifact, we developed a high speed adaptive optics line scan confocal retinal imaging system. METHODS:
Jing Lu, Boyu Gu, Xiaolin Wang, Yuhua Zhang   +3 more
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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
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A Study on a Single Continuous Deformable Mirror for Correction of Atmospheric Disturbance [PDF]

한국정밀공학회지, 2018
The deformable mirror is the main component of the adaptive optical imaging system, which removes the atmospheric disturbance and acquires the target image without any loss and the beam transmission system, which transmits the laser beam to a long ...
Hyun Cheol Cho, Seong Jin Kim, Jeong Min Kang, Hyun Su Jung   +3 more
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Flow Field Estimation with Distortion Correction Based on Multiple Input Deep Convolutional Neural Networks and Hartmann–Shack Wavefront Sensing

Photonics
The precise estimation of fluid motion is critical across various fields, including aerodynamics, hydrodynamics, and industrial fluid mechanics. However, refraction at complex interfaces in the light path can cause image deterioration and lead to severe ...
Zeyu Gao, Xinlan Ge, Licheng Zhu, Shiqing Ma, Ao Li, Lars Büttner, Jürgen Czarske, Ping Yang   +7 more
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Optimization of Iterative Control Algorithms for High-Resolution Adaptive Optics Systems

IEEE Photonics Journal
As the number of wavefront sensor subapertures and deformable mirror actuators in adaptive optics systems increases, the computational time of the direct gradient wavefront control algorithm is excessively long, which is a major factor affecting the ...
Shenghu Liu, Wang Zhao, Shuai Wang, Kangjian Yang, Ping Yang, Hongli Guan, Han Guo, Ruifeng He   +7 more
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Mode-Voltage Constrained Control for Adaptive Optics System

IEEE Photonics Journal
In the adaptive optics system of astronomical observation, the deformable mirror and the tip/tilt mirror are coupled during the correction process.
Ruitao Wang, Youming Guo, Nanfei Yan, Ying Yang, Lanqiang Zhang, Qiong Tu, Lingxiao Li, Changhui Rao   +7 more
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Optical calibration and performance of the adaptive secondary mirror at the Magellan telescope

Scientific Reports, 2018
In this paper we describe the procedure for the optical calibration of large size deformable mirrors, acting as wavefront correctors for adaptive optics systems.
Runa Briguglio, Fernando Quirós-Pacheco, Jared R. Males, Marco Xompero, Armando Riccardi, Laird M. Close, Katie M. Morzinski, Simone Esposito, Enrico Pinna, Alfio Puglisi, Lauren Schatz, Kelsey Miller   +11 more
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