Results 91 to 100 of about 1,162,754 (126)

A Multi-Deformable-Mirror 500 Hz Adaptive Optical System for Atmospheric Turbulence Simulation, Real-Time Reconstruction, and Wavefront Correction Using Bimorph and Tip-Tilt Correctors

Photonics
Atmospheric turbulence introduces distortions to the wavefront of propagating optical radiation. It causes image resolution degradation in astronomical telescopes and significantly reduces the power density of radiation on the target in focusing ...
Ilya Galaktionov, Vladimir Toporovsky
doaj   +1 more source

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

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   +1 more source

Shack Hartmann Sensor

, 2010
The Pyramid WaveFront Sensor exhibits a larger sensitivity than the Shack-Hartmann one. Here we show the effect on the lowest order mode, the tip-tilt..
DIMA, Marco, RAGAZZONI, Roberto
core  

Experimental Verification of Model-Based Wavefront Sensorless Adaptive Optics System for Large Aberrations

Micromachines
To address the limitations of conventional wavefront sensorless adaptive optics (AO) systems regarding iteration efficiency and convergence speed, this study conducts an experimental validation of a model-based wavefront sensorless AO approach.
Huizhen Yang, Yongqiang Miao, Peng Chen, Zhiguang Zhang, Zhaojun Yan   +4 more
doaj   +1 more source

 Construction of a shack-Hartmann wavefront sensor using two types of microlens arrays

, 2010
En esta tesis se presenta la construcción de un sensor de frente de onda tipo Shack-Hartmann con dos configuraciones diferentes en el arreglo de microlentes. En el primer arreglo se usa un arreglo de lentecillas comercial de sílice fundido.
Claudia Ivette García Gil
core  

An embedded adaptive optics real time controller [PDF]

, 2007
The design and realisation of a low cost, high speed control system for adaptive optics (AO) is presented. This control system is built around a field programmable gate array (FPGA).
Saunter, Christopher D., Saunter, Christopher D   +1 more
core  

Differential Wavefront Curvature Sensor

, 2005
In this paper, a wavefront curvature sensor is presented. This sensor is based on the measurements of the differentials of wavefront slopes, where the wavefront slope measurements can be achieved by a Shack-Hartmann sensor.
Zou, Weiyao, Rolland, Jannick
core   +1 more source

Multi-Spectral and Single-Shot Wavefront Detection Technique Based on Neural Networks

Photonics
Conventional wavefront sensors face challenges when detecting frequency-domain information. In this study, we developed a high-precision, and fast multi-spectral wavefront detection technique based on neural networks.
Xunzheng Li, Aoyang Wang, Mao Fan, Lianghong Yu, Xiaoyan Liang   +4 more
doaj   +1 more source

Microlens Array-Based Beam Profile and Wavefront Sensor With Physical Constraint Learning

IEEE Photonics Journal
The beam profile and wavefront characteristics of laser beams are essential for numerous laser applications, including micromachining and microfabrication.
Feng-Chun Hsu, Chun-Yu Lin, Chia-Yuan Chang, Shean-Jen Chen   +3 more
doaj   +1 more source

Noise-insensitive centroiding algorithm for a Shack-Hartmann sensor

, 2008
A Shack-Hartmann wavefront sensor is the most popular device for wavefront sensing in the field of adaptive optics. The sensing errors of a Shack-Hartmann sensor are caused by various factors, including the noise of a detector, the magnitude and the ...
Kim, Ji-Yeon, Lee, Jun-Ho, Roh, Kyung-Wan, Youn, Sung-Kie, Uhm, Tae-Kyoung   +4 more
core   +1 more source