Results 61 to 70 of about 109,137 (327)
High Power Laser Science and EngineeringAccurate characterization of high-power laser parameters, especially the near-field and far-field distributions, is crucial for inertial confinement fusion experiments.
Hua Tao +7 more
doaj +1 more source
Accuracy of Shack-Hartmann wavefront sensor using a coherent wound fibre image bundle
, 2018 Shack-Hartmann wavefront sensors using wound fibre bundles are desired for multi-object adaptive optical systems to provide large multiplex positioned by Starbugs.
Goodwin, Michael +2 more
core +1 more source
Fluctuating Curvature and Actuation in 4D Printed Asymmetric Networks by Frontal Photopolymerization
Advanced Materials Interfaces, EarlyView.Asymmetric polymer networks, fabricated by frontal photopolymerization (FPP), are shown to exhibit curvature oscillations associated with monomer‐solvent exchanges during development and drying. We introduce a theoretical model for such dynamic curvature fluctuations and demonstrate the fabrication of bistable switches and self‐propelled materials that
Muhammad Ghifari Ridwan +3 more
wiley +1 more source
Adaptive Shack-Hartmann wavefront sensor accommodating large wavefront variations
Optics Express, 2018 Shack-Hartmann wavefront sensors (SHWFSs) usually have fixed subaperture areas on the detector, in order to fix the minimum and maximum amounts of wavefront departure, or the dynamic range of measurement. We introduce an active approach, named Adaptive Shack Hartmann Wavefront Sensor (A-SHWFS). A-SHWFS is used to reconfigure detection subaperture areas
Maham, Aftab +3 more
openaire +2 more sources
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
Advanced Materials Technologies, EarlyView.An LCD‐compatible complementary liquid‐crystal metasurface delivers dual‐band, dual‐polarized Ka‐band wavefront control with millisecond switching via a 10‐µm LC gap. Interlaced patch/slot pairs enable independent phase tuning at 28 and 38 GHz, while strategic 45° slot rotation suppresses parasitic resonances. Measurements on a 160 × 160‐cell prototype
Daehyeon Kim +4 more
wiley +1 more source
Advanced Materials Technologies, EarlyView.Hybrid‐filled voxel AM enables integration of high‐permittivity materials into additively manufactured devices. Using this approach, a graded refractive index (GRIN) lens is demonstrated, achieving a 50% antenna size reduction with enhanced directivity.
Qianfang Zheng +4 more
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
Strategies for high order wavefront sensing and control (HOWFSC) computation on future space telescopes [PDF]
, 2021 Nicholas Belsten +4 more
openalex +1 more source
Advanced Optical Materials, EarlyView.A metal‐based thermal metasurface supporting bound states in the continuum is demonstrated and experimentally shown to achieve a record‐high quality factor of 202 and high emissivity of 0.82. The design offers thermally stable, narrowband mid‐infrared emission, making it ideal for high‐precision gas sensing applications.
Guodong Zhu +8 more
wiley +1 more source