Results 91 to 100 of about 154,766 (375)
Multiple Spatial Frequencies Pyramid WaveFront Sensing [PDF]
, 2017 A modification of the pyramid wavefront sensor is described. In this conceptually new class of devices, the perturbations are split at the level of the focal plane depending upon their spatial frequencies, and then measured separately.
Bergomi, Maria +13 more
core +1 more source
WISH: wavefront imaging sensor with high resolution
Light: Science & Applications, 2019 Wavefront sensing is the simultaneous measurement of the amplitude and phase of an incoming optical field. Traditional wavefront sensors such as Shack-Hartmann wavefront sensor (SHWFS) suffer from a fundamental tradeoff between spatial resolution and ...
Yicheng Wu, M. Sharma, A. Veeraraghavan
semanticscholar +1 more source
Wavefront modulation and subwavelength diffractive acoustics with an acoustic metasurface [PDF]
Nature Communications, 2014 Metasurfaces are a family of novel wavefront-shaping devices with planar profile and subwavelength thickness. Acoustic metasurfaces with ultralow profile yet extraordinary wave manipulating properties would be highly desirable for improving the ...
Yangbo Xie +5 more
semanticscholar +1 more source
Surface Energy‐Confined Multi‐Layer Inkjet Printing for Customizable Optical Microstructures
Advanced Materials, EarlyView.A surface energy‐confined multi‐layer inkjet printing strategy is developed for customizable fabrication of 3D optical microstructures. By combining interfacial energy confinement with layer‐by‐layer processing, various 3D curved optical microstructures with tailorable morphology, material composition, and spatial configuration are precisely fabricated
Kaixuan Li +14 more
wiley +1 more source
Replay as wavefronts and theta sequences as bump oscillations in a grid cell attractor network
eLife, 2019 Grid cells fire in sequences that represent rapid trajectories in space. During locomotion, theta sequences encode sweeps in position starting slightly behind the animal and ending ahead of it. During quiescence and slow wave sleep, bouts of synchronized
Louis Kang, Michael R DeWeese
doaj +1 more source
Independent Wavefront Multiplexing with Metasurfaces via Non‐Injective Transformation
Advanced Materials, EarlyView.In this work, a universal metasurface multiplexing strategy is presented based on non‐injective transformation. By jointly optimizing two metasurfaces, multiplexed channels achieve independent wavefront control, overcoming crosstalk limits of single‐layer designs.
Xiao Jin, Thomas Zentgraf
wiley +1 more source
Breaking of Wavelength-Dependence in Holographic Wavefront Sensors Using Spatial-Spectral Filtering
Sensors, 2023 Nowadays, wavefront sensors are widely used to control the shape of the wavefront and detect aberrations of the complex field amplitude in various fields of physics. However, almost all of the existing wavefront sensors work only with quasi-monochromatic
Nikita Stsepuro +3 more
doaj +1 more source
Development of a scalable generic platform for adaptive optics real time control
, 2015 The main objective of the present project is to explore the viability of an adaptive optics control system based exclusively on Field Programmable Gate Arrays (FPGAs), making strong use of their parallel processing capability.
Burse, Mahesh P. +3 more
core +1 more source
Dynamic and Reconfigurable Acoustic Fields Enabled by Morphing Fluidic Holographic Lenses
Advanced Materials Technologies, EarlyView.Real‐time reconfiguration of the acoustic field is achieved using fluidic holographic lenses that dynamically morph their structure via controlled volume changes. This compact, programmable approach eliminates the need for active elements like phased arrays, enabling high‐resolution, adaptive wavefront control with enhanced flexibility for diverse ...
Moustafa Sayed Ahmed, Shima Shahab
wiley +1 more source
Wavefront sensor and wavefront corrector matching in adaptive optics
Optics Express, 2007 Matching wavefront correctors and wavefront sensors by minimizing the condition number and mean wavefront variance is proposed. The particular cases of two continuous-sheet deformable mirrors and a Shack-Hartmann wavefront sensor with square packing geometry are studied in the presence of photon noise, background noise and electronics noise.
openaire +3 more sources