Results 71 to 80 of about 6,266 (254)
Advanced Science, EarlyView.This work introduces a beamforming‐based method to generate acoustic images from fiber‐optic distributed acoustic sensing (DAS) data. By performing 2D scanning around the sensing fiber, the approach enables near‐field imaging and localization of acoustic sources, even in regions distant from the fiber. A data‐driven DAS channel selection improves image
Marcelo A. Soto +1 more
wiley +1 more source
Light: Advanced ManufacturingThe widely used Shack–Hartmann wavefront sensor (SHWFS) is a wavefront measurement system. Its measurement accuracy is limited by the reference wavefront used for calibration and also by various residual errors of the sensor itself.
Yi He +5 more
doaj +1 more source
Programmable Chiral Radiation via Spin‐Decoupled Metasurface with Integrated Compound Phases
Advanced Science, EarlyView.A programmable spin‐decoupled metasurface integrating propagation and geometric phases enables high‐purity chiral radiation with reconfigurable emission direction. Spin‐selective radiators combined with a compound phase decoupling strategy suppress undesired components, while embedded PIN diodes allow real‐time directional control.
Lu Song +8 more
wiley +1 more source
Reconstructing Focal Topological Curves through Vortex Spots from Multifocal Metasurfaces
Advanced Science, EarlyView.Multichannel multifocal silicon metasurfaces are built to reconstruct focal topological curves using an array of vortex spots, and upconverted fluorescence is used to directly visualize the morphology of the near‐infrared focal fields. Abstract Structured light plays an important role in modern photonics.
Hongguang Dong +4 more
wiley +1 more source
Study of Point Scanning Detection Mechanisms for Vibration Signals with Wavefront Sensors
PhotonicsSeismic wave laser remote sensing is extensively employed in seismic monitoring and resource exploitation. This work establishes a vibration signal point scanning detection system utilizing wavefront sensors, leveraging their high resolution, array ...
Quan Luo +7 more
doaj +1 more source
Surface Adhesion Engineering for Armored Metasurfaces and Beyond
Advanced Science, EarlyView.Targeting primary causes of dysfunctionality in optical systems, an “armored” metasurface is developed based on Persson's model and Hertzian theory, enabling anti‐dust, anti‐scratch, anti‐impact, and anti‐water, heat resistance capabilities, alongside excellent optical antireflection performance.
Lianwei Chen +10 more
wiley +1 more source
Varifocal Meta‐Lens for Multifunctional Focusing and Imaging
Advanced Science, EarlyView.A varifocal meta‐lens enables dynamic switching between conventional focusing and non‐diffracting autofocusing beams, relying on a phase design with dual interpretations in both real space and the spatial frequency domain. By integrating a Moiré‐based tuning mechanism, the system achieves continuous focal length control in both modes.
Rong Lin +6 more
wiley +1 more source
Physical Interpretation of Diffractive Optical Networks for High‐Dimensional Vortex Mode Sorting
Advanced Science, EarlyView.The first layer‐resolved physical interpretation of diffractive optical networks trained for high‐dimensional vortex mode sorting is presented, revealing transformation division phenomena linked to saturated performance as layer numbers increase. This analysis reconciles physical theorems with network operations, enabling physics‐driven design of ...
Ruitao Wu +7 more
wiley +1 more source
Teledyne e2v sensors for adaptive optics wavefront sensing on ELTs: high rate, large format, and low noise [PDF]
, 2017 Paul Jorden
openalex +1 more source
Performance limits of adaptive-optics/high-contrast imagers with pyramid wavefront sensors [PDF]
, 2020 Carlos Correia +5 more
openalex +1 more source