Results 81 to 90 of about 154,766 (375)

Adaptive optics with an infrared pyramid wavefront sensor at Keck

Journal of Astronomical Telescopes Instruments and Systems, 2020
. The study of cold or obscured, red astrophysical sources can significantly benefit from adaptive optics (AO) systems employing infrared (IR) wavefront sensors.
C. Bond, S. Cetre, S. Lilley, P. Wizinowich, D. Mawet, M. Chun, E. Wetherell, S. Jacobson, C. Lockhart, Eric A. Warmbier, S. Ragland, C. Alvarez, O. Guyon, S. Goebel, J. Delorme, N. Jovanovic, D. Hall, J. Wallace, M. Taheri, C. Plantet, V. Chambouleyron   +20 more
semanticscholar   +1 more source

Hyperspectral compressive wavefront sensing

High Power Laser Science and Engineering, 2023
Abstract Presented is a novel way to combine snapshot compressive imaging and lateral shearing interferometry in order to capture the spatio-spectral phase of an ultrashort laser pulse in a single shot. A deep unrolling algorithm is utilized for snapshot compressive imaging reconstruction due to its parameter efficiency and superior speed relative ...
Sunny Howard, Jannik Esslinger, Robin H. W. Wang, Peter Norreys, Andreas Döpp   +4 more
openaire   +4 more sources

Reconfigurable Metamirrors Based on Compliant Mechanisms

Advanced Functional Materials, EarlyView.
Providing the basis for numerous practical applications, the reconfigurability of metadevices is of great importance. Through the integration of controlled mechanical deformation with chiral meta‐atoms, a compliant mechanism based metamirror is demonstrated for active control over the polarization of electromagnetic waves.
Galestan Mackertich‐Sengerdy, Lei Kang, Sawyer D. Campbell, Douglas H. Werner   +3 more
wiley   +1 more source

Achieving Directive Radiation and Broadband Microwave Absorption by an Anisotropic Metasurface

IEEE Access, 2019
Simultaneously integrating electromagnetic absorption and wavefront-shaping into a single metasurface with flat and low profile is crucial for many practical applications both in science and engineering community. Here, by introducing lossy components to
Jun Sun, Ke Chen, Guowen Ding, Wenlong Guo, Junming Zhao, Yijun Feng, Tian Jiang   +6 more
doaj   +1 more source

Transmission wavefront shearing interferometry for photoelastic materials [PDF]

, 2009
A general analysis and experimental validation of transmission wavefront shearing interferometry for photoelastic materials are presented. These interferometers applied to optically isotropic materials produce a single interference pattern related to one
Bhattacharya, Kaushik, Kramer, Sharlotte L. B., Ravichandran, Guruswami   +2 more
core   +1 more source

Progressive Insights into 3D Bioprinting for Corneal Tissue Restoration

Advanced Healthcare Materials, EarlyView.
This review explores the potential of 3D bioprinting to replicate the complex structure and function of the human cornea. It highlights key advances in bioink development, printing modalities, and in vivo performance, while addressing current challenges and emerging strategies. The review emphasizes bioprinting's promise to overcome donor shortages and
Ilayda Namli, Deepak Gupta, Yogendra Pratap Singh, Pallab Datta, Muhammad Rizwan, Mehmet Baykara, Ibrahim T. Ozbolat   +6 more
wiley   +1 more source

The Individual Virtual Eye: a Computer Model for Advanced Intraocular Lens Calculation

Journal of Optometry, 2009
Purpose: To describe the individual virtual eye, a computer model of a human eye with respect to its optical properties. It is based on measurements of an individual person and one of its major application is calculating intraocular lenses (IOLs) for ...
Jens Einighammer, Theo Oltrup, Thomas Bende, Benedikt Jean   +3 more
doaj   +1 more source

Accuracy of Shack-Hartmann wavefront sensor using a coherent wound fibre image bundle

, 2018
Shack-Hartmann wavefront sensors using wound fibre bundles are desired for multi-object adaptive optical systems to provide large multiplex positioned by Starbugs.
Goodwin, Michael, Lawrence, Jon, Zheng, Jessica R.   +2 more
core   +1 more source

Neuromorphic Light‐Responsive Organic Matter for in Materia Reservoir Computing

Advanced Materials, EarlyView.
In this work we show that light‐responsive adaptive organic matter can store and process information at the matter level, and emulate neuromorphic functionalities such as short term memory, long term memory and visual memory. Besides demonstrating that material dynamics can be exploited for spatio‐temporal event detection and motion perception, we show
Federico Ferrarese Lupi, Mateo Rosero‐Realpe, Antonio Ocarino, Francesca Frascella, Gianluca Milano, Angelo Angelini   +5 more
wiley   +1 more source

Adaptability analysis of travelling wavefront protection in LCC‐UHVDC transmission lines

IET Generation, Transmission & Distribution, 2023
The existing relay protections for line‐commutated converter (LCC)‐ultra high voltage DC (UHVDC) transmission lines are insufficient in protection sensitivity and operation speed. The travelling wavefront fault distance information can be used to improve
Zhongxue Chang, Chenhao Zhang, Bowen Chen, Guobing Song   +3 more
doaj   +1 more source