Results 51 to 60 of about 403,575 (349)

Optimization of Iterative Control Algorithms for High-Resolution Adaptive Optics Systems

open access: yesIEEE 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   +7 more
doaj   +1 more source

High-resolution visible imaging with piezoelectric deformable secondary mirror: experimental results at the 1.8-m adaptive telescope

open access: yesOpto-Electronic Advances, 2023
Integrating deformable mirrors within the optical train of an adaptive telescope was one of the major innovations in astronomical observation technology, distinguished by its high optical throughput, reduced optical surfaces, and the incorporation of the
Youming Guo   +9 more
doaj   +1 more source

Gemini MCAO Control System [PDF]

open access: yeseConf C011127 (2001) TUAT004, 2001
The Gemini Observatory is planning to implement a Multi Conjugate Adaptive Optics (MCAO) System as a facility instrument for the Gemini-South telescope. The system will include 5 Laser Guide Stars, 3 Natural Guide Stars, and 3 Deformable mirrors optically conjugated at different altitudes to achieve near-uniform atmospheric compensation over a 1 arc ...
arxiv   +1 more source

Cross-Correlation Algorithm Based on Speeded-Up Robust Features Parallel Acceleration for Shack–Hartmann Wavefront Sensing

open access: yesPhotonics
A cross-correlation algorithm to obtain the sub-aperture shifts that occur is a crucial aspect of scene-based SHWS (Shack–Hartmann wavefront sensing).
Linxiong Wen   +7 more
doaj   +1 more source

Optimization of Virtual Shack-Hartmann Wavefront Sensing

open access: yesSensors, 2021
Virtual Shack–Hartmann wavefront sensing (vSHWS) can flexibly adjust parameters to meet different requirements without changing the system, and it is a promising means for aberration measurement.
Xian Yue   +5 more
doaj   +1 more source

Fully refractive adaptive optics fluorescence microscope using an optofluidic wavefront modulator [PDF]

open access: yesOpt. Express 28.7 (2020) 9944-9956, 2020
Adaptive optics (AO) is a powerful image correction technique with proven benefits for many life-science microscopy methods. However, the complexity of adding a reflective wavefront modulator and a wavefront sensor into already complicated microscope has made AO prohibitive for its widespread adaptation in microscopy systems. We present here the design
arxiv   +1 more source

Multiple sclerosis clinical decision support system based on projection to reference datasets

open access: yesAnnals of Clinical and Translational Neurology, Volume 9, Issue 12, Page 1863-1873, December 2022., 2022
Abstract Objective Multiple sclerosis (MS) is a multifactorial disease with increasingly complicated management. Our objective is to use on‐demand computational power to address the challenges of dynamically managing MS. Methods A phase 3 clinical trial data (NCT00906399) were used to contextualize the medication efficacy of peg‐interferon beta‐1a vs ...
Chadia Ed‐driouch   +13 more
wiley   +1 more source

RMVAD-YOLO: A Robust Multi-View Aircraft Detection Model for Imbalanced and Similar Classes

open access: yesRemote Sensing
Aircraft detection technology plays a vital role in civilian applications, with significant attention being devoted to research on related algorithms in recent years.
Keda Li   +5 more
doaj   +1 more source

Accurate Light Field Depth Estimation Using Multi-Orientation Partial Angular Coherence

open access: yesIEEE Access, 2019
Occlusion is a critical issue that affects the accuracy for light field depth estimation. In the presence of occlusions, the photo-consistency property is broken, making ambiguity near occlusion areas.
Zhenghua Guo   +6 more
doaj   +1 more source

Experimental Demonstration of Adaptive Optics Correction of the External Aberrations for Distributed Fiber Laser Array

open access: yesIEEE Access, 2021
A novel method of pre-compensating the phase distortions outside the fiber laser array based on active integrated wavefront sensing is proposed and demonstrated experimentally. The scheme and the working principle are introduced.
Chao Geng   +7 more
doaj   +1 more source

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