Results 51 to 60 of about 13,728 (209)

Breakthroughs in Photonics 2013: Flat Optics: Wavefronts Control With Huygens' Interfaces

open access: yesIEEE Photonics Journal, 2014
Recent progress in the fields of nanophotonics and metamaterials has enabled the development of ultrathin and flat optical components, providing physicists and optical engineers a new method to control light.
Patrice Genevet, Federico Capasso
doaj   +1 more source

A Tip–Tilt and Piston Detection Approach for Segmented Telescopes

open access: yesPhotonics, 2020
Accurate segmented mirror wavefront sensing and control is essential for next-generation large aperture telescope system design. In this paper, a direct tip–tilt and piston error detection technique based on model-based phase retrieval with multiple ...
Shun Qin, Wai Kin Chan
doaj   +1 more source

An experimental Rayleigh laser guide star ground layer adaptive optics system for the William Herschel telescope [PDF]

open access: yes, 2005
The design of an experimental ground layer adaptive optics (GLAO) system that uses a low altitude Rayleigh laser guide star as a wavefront reference source is presented.
Morris, T J, Morris, T. J.
core  

High quality factor metasurfaces for two-dimensional wavefront manipulation

open access: yesNature Communications, 2023
The strong interaction of light with micro- and nanostructures plays a critical role in optical sensing, nonlinear optics, active optical devices, and quantum optics.
Claudio U. Hail   +4 more
doaj   +1 more source

VIRGO mirrors: wavefront control

open access: yesOptical and Quantum Electronics, 1999
The Franco-Italian VIRGO program to detect gravitational waves requires large mirrors whose optical properties are extremely severe: absorption and scattering
Mackowski, J.-M.   +6 more
openaire   +1 more source

Model-based wavefront control for CCAT [PDF]

open access: yesSPIE Proceedings, 2011
The 25-m aperture CCAT submillimeter-wave telescope will have a primary mirror that is divided into 162 individual segments, each of which is provided with 3 positioning actuators. CCAT will be equipped with innovative Imaging Displacement Sensors (IDS) - inexpensive optical edge sensors - capable of accurately measuring all segment relative motions.
Redding, David   +5 more
openaire   +2 more sources

A Benchtop Complex Wavefront Manipulator for Evaluating PSF Engineering [PDF]

open access: yes
This research focuses on constructing a wavefront manipulation benchtop system. The primary goal is to replicate a hologram reconstruction method using a two-phase or two-pass modulation system with a spatial light modulator (SLM).
Birch, Megan
core   +2 more sources

Wavefront optimized nonlinear microscopy of ex vivo human retinas [PDF]

open access: yes, 2010
A multiphoton microscope incorporating a HartmannShack HS wavefront sensor to control the ultrafast laser beam’s wavefront aberrations has been developed.
Artal Soriano, Pablo   +2 more
core   +1 more source

Modern approaches to cataract surgery with high visual acuity based on wavefront analysis

open access: yesОфтальмохирургия, 2023
Relevance. Until recently, visual acuity was the main criterion for determining the timing of surgery, but already in the early stages of cataract development, patients may suffer from reduced image quality, which affects the quality of life (“night ...
O.V. Shilovskikh   +3 more
doaj   +1 more source

Mesoscopic transport and control of light through disordered nanowire mats [PDF]

open access: yes, 2014
In this thesis the transport of light through disordered, densely packed semiconductor nanowire mats is studied. It is found that the extremely high photonic strength of these samples leads to corrections to the traditional diffusion picture of light ...
Strudley, Tom
core  

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