Switchable near-eye integral imaging display with difunctional metalens array

Zhang, Jianlei; Lan, Xiang; Zhang, Chao; Liu, Xueyan; He, Fuchu

doi:10.1016/j.ijleo.2019.163852

Cited by 10 publications

(6 citation statements)

References 22 publications

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“…In addition to the multiple focal points arranged along the vertical or horizontal direction, we also discuss a metalens with different focal lengths on different planes in space for potential applications of high-dimensional and multiphoton quantum source [ 52 ], as well as near-eye integral imaging [ 43 ]. As the projection point of each focal point on the z = 0 plane is not at the origin of the Cartesian coordinates, the phase calculation formula for each subfocal point is also different.…”

Section: Resultsmentioning

confidence: 99%

“…Since the first metalens proposed by Federico Capasso in 2016 [ 37 ], metalenses have now been well developed with high numerical aperture (NA) [ 38 ], high resolution [ 39 ], high efficiency [ 40 ], achromaticity [ 29 , 31 , 41 ], new functions [ 42 ], etc. The phase manipulation methods of metasurfaces can be divided into propagation phase [ 43 ], resonance phase [ 44 ], geometric phase [ 45 ], etc. However, there is only one focal point for most of the previous metalenses, and the applications of those single focal point metalenses are limited in many scenarios.…”

Section: Introductionmentioning

confidence: 99%

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Theoretical Design of a Bionic Spatial 3D-Arrayed Multifocal Metalens

et al. 2022

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With the development of micro/nano-optics, metasurfaces are gaining increasing attention working as novel electromagnetic wave control devices. Among which, metalenses have been developed and applied as a typical application of metasurfaces owing to their unique optical properties. However, most of those previous metalenses can only produce one focal point, which severely limits their applications. Inspired by the fly compound eye, we propose a special kind of spatial multifocal metalens. Our metalenses can reverse the polarization state of the incident circularly polarized light, which is then focused. In addition, a horizontally aligned multifocal metalens can be achieved by designing reasonable phase and region distributions, which is similar to a vertically aligned one. Most significantly, a spatially 3D-arrayed multifocal metalens with low crosstalk is well achieved by combining these two distribution methods. The proposed bionic 3D-arrayed multifocal metalens with amazing focusing effect promises applications in imaging, nanoparticle manipulation, optical communication, and other fields.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Theoretical Design of a Bionic Spatial 3D-Arrayed Multifocal Metalens

et al. 2022

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“…The paper suggests that the Laplacian (2D second order differentiation) of the input wavefront is conducted optically without any digital processing, and edge detection of certain samples with high resolution is achieved by a simple combination of a conventional microscope and a designed metasurface ( Figure 9 e). There are also various interesting studies about metalens and metasurface applications which can extract various geometric information of objects [ 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 ] or reconstruct three-dimensional images for near-eye display [ 58 , 59 , 60 ], which are not discussed here.…”

Section: Applications Based On Three-dimensional Imagingmentioning

confidence: 99%

Dielectric Metalens: Properties and Three-Dimensional Imaging Applications

Kim

et al. 2021

Sensors

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Recently, optical dielectric metasurfaces, ultrathin optical skins with densely arranged dielectric nanoantennas, have arisen as next-generation technologies with merits for miniaturization and functional improvement of conventional optical components. In particular, dielectric metalenses capable of optical focusing and imaging have attracted enormous attention from academic and industrial communities of optics. They can offer cutting-edge lensing functions owing to arbitrary wavefront encoding, polarization tunability, high efficiency, large diffraction angle, strong dispersion, and novel ultracompact integration methods. Based on the properties, dielectric metalenses have been applied to numerous three-dimensional imaging applications including wearable augmented or virtual reality displays with depth information, and optical sensing of three-dimensional position of object and various light properties. In this paper, we introduce the properties of optical dielectric metalenses, and review the working principles and recent advances in three-dimensional imaging applications based on them. The authors envision that the dielectric metalens and metasurface technologies could make breakthroughs for a wide range of compact optical systems for three-dimensional display and sensing.

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“…In addition, holographic display uses a coherent light source, so speckle noise is prone to appear in the reconstructed image. Light field display uses incoherent light sources to reconstruct four-dimensional light field information, which is considered to be one of the promising 3D display technologies [12][13][14][15][16]. The light field renders the perception of a 3D scene by reproducing the directional samples of the light rays emitted by each point of the scene.…”

Section: Introductionmentioning

confidence: 99%

Performance analysis of super multi-view based near-eye light field displays based on Gaussian beam

Zhang

Duan

2022

Thirteenth International Conference on Information Optics and Photonics (CIOP 2022)

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The issue of vergence-accommodation conflict in conventional stereoscopic displays has received considerable critical attention due to the lack of monocular focus cue. The super multi-view (SMV) based light field display is potentially capable of providing depth information to a monocular eye. In this paper, the depth resolution of SMV based light field display is deduced. Discrete depth plane can be reproduced by SMV based light field display, which is consistent with the nonuniform depth perception ability of the human eye. The retinal projected spot formation process of SMV based light field display from the display device to visual system is derived using Gaussian beams. The depth characteristic, the optimal choice of Gaussian beam, relationship between the synthetic PSF and viewpoints are discussed by simulation experiment. The present results can contribute to the design of SMV based light field displays with high-quality visual perception.

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Switchable near-eye integral imaging display with difunctional metalens array

Cited by 10 publications

References 22 publications

Theoretical Design of a Bionic Spatial 3D-Arrayed Multifocal Metalens

Theoretical Design of a Bionic Spatial 3D-Arrayed Multifocal Metalens

Dielectric Metalens: Properties and Three-Dimensional Imaging Applications

Performance analysis of super multi-view based near-eye light field displays based on Gaussian beam

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