Results 351 to 360 of about 152,963 (375)
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Diverse terahertz wavefront manipulations empowered by the spatially interleaved metasurfaces
Science China Information Sciences, 2023Jitao Li +8 more
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Wavefront shaping in complex media with a 350 kHz modulator via a 1D-to-2D transform
Nature Photonics, 2018Controlling the propagation and interaction of light in complex media has sparked major interest in the past few years. Unfortunately, spatial light modulation devices suffer from limited speed, which precludes real-time applications such as imaging in ...
O. Tzang +5 more
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Journal of Cataract and Refractive Surgery, 2021
Geunyoung Yoon, Scott MacRae
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Geunyoung Yoon, Scott MacRae
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Ptychographic wavefront cameras
Optics LettersWe introduce a snapshot wavefront camera capable of reconstructing the complex field of an object with near quantum-limited accuracy. This system incorporates a diffraction grating at the entrance aperture and an array of cameras positioned to align with the grating orders, capturing the field with varying impulse responses.
Ni Chen, David Brady
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A fast wavefront reconstructor for the nonlinear curvature wavefront sensor
Adaptive Optics Systems VI, 2018The Nonlinear Curvature Wavefront Sensor (nlCWFS), first proposed by Guyon, determines wavefront shape from images of a reference beacon in a number of planes between the pupil and focal plane of a telescope. We describe a new algorithm that rapidly recovers the low-order aberrations accurately enough to allow practical use of the nlCWFS in an adaptive
Johanan L. Codona +2 more
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Wavefront reconstruction using smartphone based wavefront sensors
SPIE Proceedings, 2015Smartphone camera system has the capability of being integrated into powerful field-sensing tools, capturing data and sharing these data with computing servers or cloud experts. The purpose of this work is to implement a wavefront sensor based on the smartphone platform, which has many potential applications in thin-films and bio-related sensing areas.
Zhenyu Yang, Qiwen Zhan
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Polarization-Independent Silicon Metadevices for Efficient Optical Wavefront Control.
Nano letters (Print), 2015We experimentally demonstrate a functional silicon metadevice at telecom wavelengths that can efficiently control the wavefront of optical beams by imprinting a spatially varying transmittance phase independent of the polarization of the incident beam ...
K. Chong +11 more
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Nonparametric narrowband wavefront estimation from wavefront gradients
IEEE Transactions on Signal Processing, 1999The wavefield sampled by a two-dimensional (2-D) planar array can he characterized by a delayed signal. This correspondence investigates the problem of the nonparametric estimation of the delay function (or wavefront) when the waveform is narrowband. The wavefront is estimated by integrating the local estimates of the differential time of delay (TOD ...
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Circulation: Arrhythmia and Electrophysiology, 2019
Background Catheter ablation of ventricular tachycardia (VT) in structural heart disease is challenging because of noninducibility or hemodynamic compromise. Ablation often depends on elimination of local abnormal ventricular activities (LAVAs) but which
Claire A. Martin +26 more
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Background Catheter ablation of ventricular tachycardia (VT) in structural heart disease is challenging because of noninducibility or hemodynamic compromise. Ablation often depends on elimination of local abnormal ventricular activities (LAVAs) but which
Claire A. Martin +26 more
semanticscholar +1 more source
Proceedings of the conference on Design, automation and test in Europe, 1999
The wavefront technology mapping algorithm leads to a very simple and efficient implementation that elegantly decouples pattern matching and covering but circumvents that patterns have to be stored for the entire network simultaneously. This coupled with dynamic decomposition enables trade-off of many more alternatives than in conventional mapping ...
Andrew Sullivan +2 more
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The wavefront technology mapping algorithm leads to a very simple and efficient implementation that elegantly decouples pattern matching and covering but circumvents that patterns have to be stored for the entire network simultaneously. This coupled with dynamic decomposition enables trade-off of many more alternatives than in conventional mapping ...
Andrew Sullivan +2 more
openaire +2 more sources