Results 21 to 30 of about 154,766 (375)
Deep learning wavefront sensing and aberration correction in atmospheric turbulence
Deep learning neural networks are used for wavefront sensing and aberration correction in atmospheric turbulence without any wavefront sensor (i.e. reconstruction of the wavefront aberration phase from the distorted image of the object).
Kaiqiang Wang+9 more
semanticscholar +1 more source
Geometric Phase in Optics: From Wavefront Manipulation to Waveguiding
Geometric phase is a unifying and central concept in physics, including optics. As a matter of fact, optics played a pivotal role from the inception of this new paradigm, as some of the first experimental demonstrations have been carried out in optics. A
C. Jisha, Stefan Nolte, A. Alberucci
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AbstractWe develop a notion of wavefront set aimed at characterizing in Fourier space the directions along which a distribution behaves or not as an element of a specific Besov space. Subsequently we prove an alternative, albeit equivalent characterization of such wavefront set using the language of pseudodifferential operators.
Dappiaggi, C, Rinaldi, P, Sclavi, F
openaire +3 more sources
Binary Amplitude Reflection Gratings for X-ray Shearing and Hartmann Wavefront Sensors
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
Communication with face masks during the COVID-19 pandemic for adults with hearing loss
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
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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
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Method for arbitrary phase transformation by a slab based on transformation optics and the principle of equal optical path [PDF]
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.
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One-Dimensional High-Resolution Wavefront Sensor Enabled by Subwavelength Compound Gratings
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
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Reconstructing the Spatial Parameters of a Laser Beam Using the Transport-of-Intensity Equation
A simple method for reconstructing the spatial parameters of a laser beam, based on the transport-of-intensity equation, is presented. Registration of cross-section intensity distributions in several planes was carried out using a single CMOS camera. The
Michael Kovalev+5 more
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Fast gap-affine pairwise alignment using the wavefront algorithm
Motivation Pairwise alignment of sequences is a fundamental method in modern molecular biology, implemented within multiple bioinformatics tools and libraries.
Santiago Marco-Sola+3 more
semanticscholar +1 more source