Results 91 to 100 of about 145,574 (223)
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
Nonreciprocal Wavefront Engineering with Time-Modulated Gradient Metasurfaces
Physical Review Applied, 2019 Author(s): Zang, JW; Correas-Serrano, D; Do, JTS; Liu, X; Alvarez-Melcon, A; Gomez-Diaz, JS | Abstract: © 2019 American Physical Society. We propose a paradigm to realize nonreciprocal wavefront engineering using time-modulated gradient metasurfaces. The
J. Zang +5 more
semanticscholar +1 more source
Efficient Polarization-Insensitive Complex Wavefront Control Using Huygens’ Metasurfaces Based on Dielectric Resonant Meta-atoms [PDF]
, 2016 Metasurfaces have shown great promise for the control of optical wavefronts, thus opening new pathways for the development of efficient flat optics. In particular, Huygens’ metasurfaces based on all-dielectric resonant meta-atoms have already shown a ...
K. Chong +10 more
semanticscholar +1 more source
Nonlinear wavefront shaping with optically induced three-dimensional nonlinear photonic crystals
Nature Communications, 2019 Generation of coherent light with desirable amplitude and phase profiles throughout the optical spectrum is a key issue in optical technologies. Nonlinear wavefront shaping offers an exceptional way to achieve this goal by converting an incident light ...
Shan Liu +7 more
semanticscholar +1 more source
DNN-based aberration correction in a wavefront sensorless adaptive optics system.
Optics Express, 2019 Existing wavefront sensorless (WFS-less) adaptive optics (AO) generally require a search algorithm that takes lots of iterations and measurements to get optimal results. So the latency is a serious problem in the current WFS-less AO system, especially in
Qinghua Tian +8 more
semanticscholar +1 more source
, 2018 We consider the mathematical background of the wavefront sensor type that is widely used in Adaptive Optics systems for astronomy, microscopy, and ophthalmology.
Hutterer, Victoria +2 more
core +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 +2 more sources
Complex wavefront reconstruction with single-pixel detector
Applied Physics Letters, 2019 Wavefront sensing is an essential tool in wide research areas. However, the auxiliary reference beam and the pixel-array detector are indispensable in most of the wavefront sensing schemes.
Ruifeng Liu +4 more
semanticscholar +1 more source