Results 91 to 100 of about 2,674,389 (338)

"Fast" and Furious focal-plane wavefront sensing at W. M. Keck\n Observatory [PDF]

, 2021
Steven P. Bos, Michael Bottom, Sam Ragland, Jacques-Robert Delorme, Sylvain Cetre, Laurent Pueyo   +5 more
openalex   +2 more sources

Training networks without wavefront label for pixel-based wavefront sensing

Frontiers in Physics
Traditional image-based wavefront sensing often faces challenges in efficiency and stagnation. Deep learning methods, when properly trained, offer superior robustness and performance.
Yuxuan Liu, Yuxuan Liu, Yuxuan Liu, Xiaoquan Bai, Xiaoquan Bai, Boqian Xu, Boqian Xu, Chunyue Zhang, Chunyue Zhang, Yan Gao, Yan Gao, Shuyan Xu, Shuyan Xu, Guohao Ju, Guohao Ju   +14 more
doaj   +1 more source

Interferometric Wavefront Sensing System Based on Deep Learning

Applied Sciences, 2020
At present, most wavefront sensing methods analyze the wavefront aberration from light intensity images taken in dark environments. However, in general conditions, these methods are limited due to the interference of various external light sources.
Yuhao Niu, Zhan Gao, Chenjia Gao, Jieming Zhao, Xu Wang   +4 more
doaj   +1 more source

Compressive Shack-Hartmann Wavefront Sensing based on Deep Neural Networks [PDF]

arXiv.org, 2020
The Shack-Hartmann wavefront sensor is widely used to measure aberrations induced by atmospheric turbulence in adaptive optics systems. However if there exists strong atmospheric turbulence or the brightness of guide stars is low, the accuracy of ...
P. Jia, M. Ma, Dongmei Cai, Weihua Wang, Juanjuan Li, Can Li   +5 more
semanticscholar   +1 more source

Imaging of Biphoton States: Fundamentals and Applications

Advanced Functional Materials, EarlyView.
Quantum states of two photons exhibit a rich polarization and spatial structure, which provides a fundamental resource of strongly correlated and entangled states. This review analyzes the physics of these intriguing properties and explores the various techniques and technologies available to measure them, including the state of the art of their ...
Alessio D'Errico, Ebrahim Karimi
wiley   +1 more source

Adaptive Hydrogels With Spatiotemporal Stiffening Using pH‐Modulating Enzymes

Advanced Functional Materials, EarlyView.
The chemomechanical coupling in an adaptive hydrogel is studied to further the development of adaptive hydrogels. This coupling is achieved by embedding a pH‐modulating enzyme in a pH‐responsive hydrogel. The enzymatic reaction can be triggered locally, which generates a pH‐decreasing wave throughout the system, increasing the crosslinking density and ...
Natascha Gray, Zoe Grämiger, André R. Studart, Rafael Libanori   +3 more
wiley   +1 more source

Collaborative development of diffraction-limited beamline optical systems at US DOE light sources [PDF]

, 2019
An ongoing collaboration among four US Department of Energy (DOE) National Laboratories has demonstrated key technology prototypes and software modeling tools required for new high-coherent flux beamline optical systems. New free electron laser (FEL) and
Assoufid, L, Bryant, D, Chao, W, Cocco, D, Goldberg, KA, Grizolli, W, Hardin, C, Huang, L, Idir, M, Kearney, SP, Lee, L, Morton, D, Ng, ML, Shi, X, Shu, D, Shvyd'Ko, Y, Wojcik, M, Wojdyla, A   +17 more
core  

Curvature sensors: noise and its propagation

, 2010
The signal measured with a curvature sensor is here analyzed. In the outset, we derive the required minimum number of sensing elements at the pupil edges, in dependence on the total number of sensing elements.
Aglae Kellerer, Arsenault, Chun, Fried, Graves, Hudgin, Lai, Roddier, Watanabe, Yang   +9 more
core   +1 more source

Structure Formation in Butterfly Scales: Interplay of Genetic Control, Mechanical Instabilities, and Dynamic Material Properties

Advanced Functional Materials, EarlyView.
Butterfly wing scales are intricate cuticular functional nanosctructures. This perspective suggests that spatially varying material properties, cytoskeletal constraints, and growth‐driven mechanical instabilities shape the resulting nanoscale architectures created from single cells.
Anupama Prakash, Victoria Lloyd, Yi Yang, Anna‐Lee Jessop, Anthony McDougal, Primož Pirih, Guillaume Duclos, Andrew Parnell, Mathias Kolle, Nicola J. Nadeau, Bodo D. Wilts   +10 more
wiley   +1 more source

High-speed imaging and wavefront sensing with an infrared avalanche photodiode array [PDF]

, 2015
Infrared avalanche photodiode arrays represent a panacea for many branches of astronomy by enabling extremely low-noise, high-speed and even photon-counting measurements at near-infrared wavelengths.
Atkinson, Dani, Baranec, Christoph, Chun, Mark, Hall, Donald, Jacobson, Shane, Law, Nicholas M., Riddle, Reed   +6 more
core   +3 more sources