Topic
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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Patent•
22 May 2009TL;DR: In this article, a display has a first and second spatial light modulators for modulating light from a light source, where the first has a plurality of elements switchable between ON and OFF states according to a pattern having a spatially-varying density.
Abstract: A display has first and second spatial light modulators for modulating light from a light source. The first spatial light modulator has a plurality of elements switchable between ON and OFF states according to a pattern having a spatially-varying density. Transfer optics blur and carry light modulated by the first spatial light modulator to the second spatial light modulator to yield a light field at the second spatial light modulator. The second spatial light modulator has a plurality of elements switchable between ON and OFF states to perform temporal dithering of the light field to provide a reconstruction of the image.
74 citations
Patent•
09 Jan 2014
TL;DR: In this article, a multi-planar plenoptic display assembly is provided that includes multiple spatially-varying light emitting and light modulating planes, but does not require, a modulating device used in conjunction according to display methods taught herein to display light field data.
Abstract: A multi-planar plenoptic display assembly is provided that includes multiple spatially-varying light emitting and light modulating planes. The display assembly includes at least one light emitting device and may include, but does not require, a modulating device used in conjunction according to display methods taught herein to display light field data. A display assembly controller may be used to render a light field with depth into a multi-planar plenoptic display assembly by assigning decomposed portions of the light field to the display assembly for display or presentation by differing ones of the emitting elements and by operating a modulating device to provide a parallax barrier. In one embodiment, a dynamic parallax barrier and a number of bi-state screens. Another embodiment uses a beam splitter to co-locate two pairs of autostereoscopic displays each including a projector projecting 3D content, a parallax barrier, and an emissive/projector element.
73 citations
TL;DR: In this paper, the concept of sculpting the object rather than the light field has been explored and it has been shown that the sculpted object can be used to control a light field.
Abstract: Using intricately sculpted light fields to control tiny objects is a well-understood and important technique. Now, the concept of sculpting the object rather than the light field promises to propel light–matter research in an exciting new direction.
73 citations
01 Nov 2011
TL;DR: In this article, a single image approach is presented to reconstructing thin transparent surfaces, such as thin solids or surfaces of fluids, based on observing the distortion of light field background illumination.
Abstract: Acquiring transparent, refractive objects is challenging as these kinds of objects can only be observed by analyzing the distortion of reference background patterns. We present a new, single image approach to reconstructing thin transparent surfaces, such as thin solids or surfaces of fluids. Our method is based on observing the distortion of light field background illumination. Light field probes have the potential to encode up to four dimensions in varying colors and intensities: spatial and angular variation on the probe surface; commonly employed reference patterns are only two-dimensional by coding either position or angle on the probe. We show that the additional information can be used to reconstruct refractive surface normals and a sparse set of control points from a single photograph.
73 citations
Journal Article•
TL;DR: In this article, the authors derived the microscopic optomagnonic Hamiltonian of a macrospin in the optical cavities and showed that the induced dissipation coefficient can change sign on the Bloch sphere, leading to self-sustained oscillations.
Abstract: Experiments during the past 2 years have shown strong resonant photon-magnon coupling in microwave cavities, while coupling in the optical regime was demonstrated very recently for the first time. Unlike with microwaves, the coupling in optical cavities is parametric, akin to optomechanical systems. This line of research promises to evolve into a new field of optomagnonics, aimed at the coherent manipulation of elementary magnetic excitations in solid-state systems by optical means. In this work we derive the microscopic optomagnonic Hamiltonian. In the linear regime the system reduces to the well-known optomechanical case, with remarkably large coupling. Going beyond that, we study the optically induced nonlinear classical dynamics of a macrospin. In the fast-cavity regime we obtain an effective equation of motion for the spin and show that the light field induces a dissipative term reminiscent of Gilbert damping. The induced dissipation coefficient, however, can change sign on the Bloch sphere, giving rise to self-sustained oscillations. When the full dynamics of the system is considered, the system can enter a chaotic regime by successive period doubling of the oscillations.
73 citations