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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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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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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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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
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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
semanticscholar +1 more source
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
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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Wavefront technology in ophthalmology
Current Opinion in Ophthalmology, 2001Wavefront sensing is an emerging technology that can measure irregular astigmatism as a higher-order wavefront aberration. The application of wavefront sensing in ophthalmology might enable the non-invasive observation of living retinal cone cells; the measurement of detailed visual function of the central nervous system by eliminating higher-order ...
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Wavefront reconstruction and prediction with convolutional neural networks
Astronomical Telescopes + Instrumentation, 2018While deep learning has led to breakthroughs in many areas of computer science, its power has yet to be fully exploited in the area of adaptive optics (AO) and astronomy as a whole.
Robin Swanson +4 more
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Wavefront Reconstruction Methods
Journal of Refractive Surgery, 2009Douglas D, Koch +2 more
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2010
Since this book is about wavefront sensors it is appropriate to understand and define the subject of the measurement, i.e., the wavefront. Although the concept is simple, understanding it is not! This chapter examines the conceptual framework that supports the wavefront idea.
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Since this book is about wavefront sensors it is appropriate to understand and define the subject of the measurement, i.e., the wavefront. Although the concept is simple, understanding it is not! This chapter examines the conceptual framework that supports the wavefront idea.
openaire +2 more sources