Results 31 to 40 of about 864,560 (239)

Adaptive Optics Methods to Rat Eye Properties: Impact of Pupil Diameter on Wavefront Detection

Photonics
Achieving a high-quality wavefront sensing light spot and accurate wavefront estimation of the rat eye is still challenging due to its large ocular aberrations and the back reflections from fundus multilayer.
Wen Kong, Jiangjie Huang, Yi He, Guohua Shi   +3 more
doaj   +1 more source

Symmetry‐Guided Multifunctional Acoustic System Based on Mechanically Actuated Sonic Crystals

Advanced Engineering Materials, EarlyView.
This study presents the design, simulation, and experimental validation of amultifunctional acoustic metamaterial based on rotationally engineered sonic crystals.By tuning cylinder orientations, controllable band gaps and six distinct functionalities—including switching, topological insulation, beam splitting, and logic operations—areachieved ...
Yuanyan Zhao, Sriram Subramanian, Gianluca Memoli   +2 more
wiley   +1 more source

Wavefront Curvature Sensing from Image Projections [PDF]

, 2006
This research outlines the development and simulation of a signal processing approach to real time wavefront curvature sensing in adaptive optics. The signal processing approach combines vectorized Charge Coupled Device (CCD) read out with a wavefront ...
Buffington, Jonathan C.
core   +1 more source

Single-shot hyperspectral wavefront imaging

Nature Communications
Single-shot hyperspectral wavefront sensing is essential for applications like spatio-spectral coupling metrology in high-power laser or fast material dispersion imaging.
Baptiste Blochet, Nathalie Lebas, Pascal Berto, Dimitrios Papadopoulos, Marc Guillon   +4 more
doaj   +1 more source

Single-Shot Wavefront Sensing in Focal Plane Imaging Using Transformer Networks

Optics
Wavefront sensing is an essential technique in optical imaging, adaptive optics, and atmospheric turbulence correction. Traditional wavefront reconstruction methods, including the Gerchberg–Saxton (GS) algorithm and phase diversity (PD) techniques, are ...
Hangning Kou, Jingliang Gu, Jiang You, Min Wan, Zixun Ye, Zhengjiao Xiang, Xian Yue   +6 more
doaj   +1 more source

Experimental Demonstration of Sequential Operation Approach for a Three-Sided Pyramid Wavefront Sensor

IEEE Photonics Journal, 2016
We describe a sequential operation approach for a three-sided pyramid wavefront sensor (PWFS) based on a micromirror array with hexagonal geometry. The geometrical optics analysis and numerical simulations show that a linear relationship exists between ...
Lu Chen, Jianli Wang, Kainan Yao, Xinyue Liu, Xudong Lin, Liang Wang, Minghao Wang   +6 more
doaj   +1 more source

ARGOS wavefront sensing: from detection to correction [PDF]

, 2014
Argos is the ground-layer adaptive optics system for the Large Binocular Telescope. In order to perform its wide-field correction, Argos uses three laser guide stars which sample the atmospheric turbulence.
Connot, C., Borelli, J., Storm, J., Kulas, M., J. Storm, Bonaglia, M., S. Esposito, S. Rabien, L. Busoni, Gilles Orban de Xivry, Busoni, L., Puglisi, A., Mazzoni, T., J. Borelli, A. Puglisi, C. Connot, Esposito, S., J. Ziegleder, T. Mazzoni, Orban De Xivry, Gilles, Ziegleder, J., Gaessler, W., Orban de Xivry, G., M. Bonaglia, W. Gaessler, M. Kulas, Rabien, S.   +26 more
core   +1 more source

Enhanced Ultrasound Transmission Through Aberration Layers Using Space‐Coiling Acoustic Metamaterials

Advanced Engineering Materials, EarlyView.
Enhancing ultrasound transmission through an aberration layer exhibiting mismatched impedance with the surrounding medium possesses great implications in imaging and treatment. In this study, we show that a space‐coiling acoustic metamaterial with judiciously tailored structural profile can help improve impedance matching.
Maral Ghanami, Hengzhe Ren, Erqian Dong, Ashkan Ghanbarzadeh‐Dagheyan, Chen Shen   +4 more
wiley   +1 more source

Metasurface-Enabled Helical Wavefront Fingerprint Metrology for Quantitative Retrieval of Liquid Optical Constants. [PDF]

Adv Sci (Weinh)
A metasurface‐enabled helical wavefront fingerprint (MHWF) paradigm is proposed for quantitative and specific retrieval of a liquid medium's refractive index and extinction coefficient. The liquid's complex dielectric response governs the wavefront evolution of the metasurface‐generated focused vortex beam, forming a distinctive three‐dimensional ...
Zhou Y, Li H, Li S, Jiao F, Du Y, Kim JT, Lee SS, Choi DY, Ding F, Yu X, Guan X.   +10 more
europepmc   +2 more sources

Two‐Photon Grayscale Lithography (2GL) of High Mechanical and Optical Quality 3D Silica Glass Microstructures

Advanced Functional Materials, EarlyView.
Two‐photon grayscale lithography (2GL) enables high‐speed and precise 3D printing of thermolyzed silica glass microstructures with optical‐grade surface quality, high quality factors, and mechanical strength utilizing a custom‐made pre‐glass resist based on polyhedral oligomeric silsesquioxane (POSS) modified with a high‐sensitivity Norrish type II ...
Jonathan L. G. Schneider, Jiajie Liang, Paul Somers, Martin Wegener, Jens Bauer   +4 more
wiley   +1 more source