Results 1 to 10 of about 80,548 (342)

One-Dimensional High-Resolution Wavefront Sensor Enabled by Subwavelength Compound Gratings

open access: yesPhotonics, 2023
Angle sensors are widely used for wavefront measurements, which is attributed to their integration and robustness. Currently, commercial sensors are available with pixel sizes in the order of wavelengths.
Yunlong Meng   +6 more
doaj   +1 more source

On Machine Learning Approaches for Automated Log Management [PDF]

open access: yesJournal of Universal Computer Science, 2019
We address several problems in intelligent log management of distributed cloud computing applications and their machine learning solutions. Those problems concern various tasks on characterizing data center states from logs, as well as from related or ...
Ashot Harutyunyan   +4 more
doaj   +3 more sources

Method for calculating a refractive optical element forming given illuminance distribution and wavefront

open access: yesКомпьютерная оптика, 2021
In the geometrical optics approximation, we consider a method for calculating a refractive optical element with two freeform surfaces, which transforms an incident beam with a plane wave-front into an output beam with a required wavefront and generating ...
L.L. Doskolovich   +3 more
doaj   +1 more source

Binary Amplitude Reflection Gratings for X-ray Shearing and Hartmann Wavefront Sensors

open access: yesSensors, 2021
New, high-coherent-flux X-ray beamlines at synchrotron and free-electron laser light sources rely on wavefront sensors to achieve and maintain optimal alignment under dynamic operating conditions. This includes feedback to adaptive X-ray optics.
Kenneth A. Goldberg   +2 more
doaj   +1 more source

Method for arbitrary phase transformation by a slab based on transformation optics and the principle of equal optical path [PDF]

open access: yesJournal of the European Optical Society-Rapid Publications, 2012
The optical path lengths travelled by rays across a wavefront essentially determine the resulting phase front irrespective of the shape of a medium according to the principle of equal optical path.
Ke Y., Shu W., Luo H., Wen S., Fan D.
doaj   +1 more source

Communication with face masks during the COVID-19 pandemic for adults with hearing loss

open access: yesCognitive Research, 2022
Face masks have become common protective measures in community and workplace environments to help reduce the spread of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection. Face masks can make it difficult to hear and understand speech,
Brenda T. Poon, Lorienne M. Jenstad
doaj   +1 more source

Optical Bench Analysis of 2 Depth of Focus Intraocular Lenses

open access: yesBiomedicine Hub, 2021
Background: The aim of the study was to analyze the objective optical properties of 2 enhanced depth of focus (EDoF) intraocular lenses (IOLs) using optical bench analysis.
Andreas F. Borkenstein   +3 more
doaj   +1 more source

It is a sufficient condition only, not a necessary and sufficient condition, for decomposing wavefront aberrations

open access: yesJournal of the European Optical Society-Rapid Publications, 2022
The classic equation for decomposing the wavefront aberrations of axis-symmetrical optical systems has the form, W ( h 0 , ρ , ϕ ) = ∑ j = 0 ∝ ∑ p = 0 ∝ ∑ m = 0 ∝ C 2 j + m 2 p + m m ( h 0 ...
Lin Psang
doaj   +1 more source

Rhythmic Calcium Events in the Lamina Propria Network of the Urinary Bladder of Rat Pups

open access: yesFrontiers in Systems Neuroscience, 2017
The lamina propria contains a dense network of cells, including interstitial cells (ICs), that may play a role in bladder function by modulating communication between urothelium, nerve fibers and smooth muscle or acting as pacemakers.
Thomas J. Heppner   +3 more
doaj   +1 more source

Zernike-coefficient extraction via helical beam reconstruction for optimization (ZEHBRO) in the far field

open access: yesHigh Power Laser Science and Engineering, 2023
The spatial distribution of beams with orbital angular momentum in the far field is known to be extremely sensitive to angular aberrations, such as astigmatism, coma and trefoil. This poses a challenge for conventional beam optimization strategies when a
J. B. Ohland   +6 more
doaj   +1 more source

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