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Light field

About: Light field is a research topic. Over the lifetime, 5357 publications have been published within this topic receiving 87424 citations.


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Proceedings ArticleDOI
18 Apr 2017
TL;DR: In this paper, the authors studied deblurring light fields of general 3D scenes captured under 3D camera motion and developed intuition into the effects of camera motion on the light field, and showed the advantages of capturing a 4D light field instead of a conventional 2D image for motion deblur.
Abstract: We study the problem of deblurring light fields of general 3D scenes captured under 3D camera motion and present both theoretical and practical contributions. By analyzing the motion-blurred light field in the primal and Fourier domains, we develop intuition into the effects of camera motion on the light field, show the advantages of capturing a 4D light field instead of a conventional 2D image for motion deblurring, and derive simple analytical methods of motion deblurring in certain cases. We then present an algorithm to blindly deblur light fields of general scenes without any estimation of scene geometry, and demonstrate that we can recover both the sharp light field and the 3D camera motion path of real and synthetically-blurred light fields.

30 citations

Journal ArticleDOI
TL;DR: In this article, the spin-orbit optical cross-phase modulation (SOCM) was proposed to write optical phase singularities (PSs) into a light beam using the giant Kerr optical nonlinearities of liquid crystals.
Abstract: We show experimentally that optical phase singularities (PSs) can be written and erased, locally and in a controllable manner, into a light beam using the giant Kerr optical nonlinearities of liquid crystals. The method relies on the nonlinear optical spin-orbit coupling experienced by a collimated probe beam when a collinear focused pump beam imprints a radial birefringent pattern into a nematic film. In addition, experimental data are quantitatively described, accounting for the elastic anisotropy of the material and its nonlocal spatial response to the pump light field. Since we show that the optical intensity of a light beam (the "pump") controls the phase of another beam (the "probe") in a singular fashion (i.e., with the generation of a screw PS) via their interaction in a nonlinear medium that involves spin-orbit coupling, we dubbed such a nonlinear optical process as spin-orbit optical cross-phase-modulation.

30 citations

Journal ArticleDOI
TL;DR: It is shown how to use a plenoptic sensor to transform the light field of a vortex beam so that a simple and direct reconstruction algorithm can be applied to reveal the vortex phase structure.
Abstract: A branch point problem and its solution commonly involve recognizing and reconstructing a vortex phase structure around a singular point. In laser beam propagation through random media, the destructive phase contributions from various parts of a vortex phase structure will cause a dark area in the center of the beam’s intensity profile. This null of intensity can, in turn, prevent the vortex phase structure from being recognized. In this Letter, we show how to use a plenoptic sensor to transform the light field of a vortex beam so that a simple and direct reconstruction algorithm can be applied to reveal the vortex phase structure. As a result, we show that the plenoptic sensor is effective in detecting branch points and can be used to reconstruct phase distortion in a beam in a wide sense.

30 citations

Proceedings ArticleDOI
06 Nov 2016
TL;DR: AnyLight is a lighting device that uses computational light fields to offer highly programmable illumination for architectural environments, relying on integral imaging to mimic the illumination effects of various light sources, both real and imagined.
Abstract: In this paper we describe AnyLight, a lighting device that uses computational light fields to offer highly programmable illumination for architectural environments. Relying on integral imaging--a technique commonly used to realize stereoscopic 3D displays--AnyLight can mimic the illumination effects of various light sources, both real and imagined. A combination of high-output, narrow-beam LED backlight and custom, 3D printed optics give the device the capacity to shoot out strong, targeted light rays from its surface in arbitrary directions. The paper will provide extensive discussions covering the device's technical details, usage scenarios, and possibilities for future extensions; quantitative and qualitative results from our initial evaluation sessions will be reported as well.

30 citations

Journal ArticleDOI
TL;DR: In this article, a mode-selective excitation of complex amplitudes is performed with only one phase-only spatial light modulator, and the light field propagating through the fiber is measured holographically and is analyzed by a rapid decomposition method.
Abstract: Multimode fibers (MMF) are promising candidates to increase the data rate while reducing the space required for optical fiber networks. However, their use is hampered by mode mixing and other effects, leading to speckled output patterns. This can be overcome by measuring the transmission matrix (TM) of a multimode fiber. In this contribution, a mode-selective excitation of complex amplitudes is performed with only one phase-only spatial light modulator. The light field propagating through the fiber is measured holographically and is analyzed by a rapid decomposition method. This technique requires a small amount of measurements N, which corresponds to the degree of freedom of the fiber. The TM determines the amplitude and phase relationships of the modes, which allows us to understand the mode scrambling processes in the MMF and can be used for mode division multiplexing.

30 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023135
2022375
2021274
2020493
2019555
2018503