Dual-View Integral Imaging 3D Display Based on Multiplexed Lens-Array Holographic Optical Element

Zhang, Han‐Le; Deng, Huan; He, Min-Yang; Li, Dahai; Wang, Qiong‐Hua

doi:10.3390/app9183852

“…The viewer at a fixed position can choose which contents to see from the screen by wearing lens or not, while viewers at other locations can get neither of these contents. In another scenario, the CGH can project images to different viewers [18,21], who can decide whether to wear a glass or not as they wish. The technology may also be integrated into available near-eye display devices [22,23].…”

Section: Concept Of the Holographic Multiplexing Methodsmentioning

confidence: 99%

Domain multiplexed computer-generated holography by embedded wavevector filtering algorithm

Wu

¹

,

Zhang

²

2021

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Computer-generated holography can obtain the wavefront required for constructing arbitrary intensity distributions in space. Currently, speckle noises in holography remain an issue for most computational methods. In addition, there lacks a multiplexing technology by which images from a single hologram and light source can be switched by a lens. In this work, we first come up with a new algorithm to generate holograms to project smoother images by wavevector filtering. Thereupon, we propose a unique multiplexing scheme enabled by a Fourier lens, as the incident light can be decomposed either by a superposition of spherical waves or plane waves. Different images are obtained experimentally in the spatial and wavevector domains, switchable by a lens. The embedded wavevector filtering algorithm provides a new prospective for speckle suppression without the need for postprocessing. The multiplexing technology can double the capacity of current holographic systems and exhibits potential for various interesting display applications.

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“…The viewer at a fixed position can choose which contents to see from the screen by wearing lens or not, while viewers at other locations can get neither of these contents. In another scenario, the CGH can project images to different viewers [19,22], who can decide whether to wear a glass or not as they wish. The technology may also be integrated into available near-eye display devices [23,24].…”

Section: Concept Of the Holographic Multiplexing Methodsmentioning

confidence: 99%

Domain Multiplexed Computer-generated Holography by Embedded Wavevector Filtering Algorithm

Wu

¹

,

Zhang

²

2020

Preprint

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Computer-generated holography can obtain the wavefront required for constructing arbitrary intensity distributions in space. Currently, speckle noises in holography remain an issue for most computational methods. In addition, there lacks a multiplexing technology by which images from a single hologram and light source can be switched by a lens. In this work, we first come up with a new algorithm to generate holograms to project smoother images by wavevector filtering. Thereupon, we propose a unique multiplexing scheme enabled by a Fourier lens, as the incident light can be decomposed either by a superposition of spherical waves or plane waves. Different images are obtained experimentally in the spatial and wavevector domains, switchable by a lens. The embedded wavevector filtering algorithm provides a new prospective for speckle suppression without the need for postprocessing. The multiplexing technology can double the capacity of current holographic systems and exhibits potential for various interesting display applications.

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“…And, the construction of the first point focusing on HL was demonstrated by Schwar et al in 1967 [ 16 ]. Given that breakthrough at the time, other researchers proposed to gather several functions on a single substrate by multiplexing two or more HOE [ 17 , 18 , 19 , 20 , 21 , 22 , 23 ] due to their high diffraction efficiency and narrow band frequency characteristics.…”

Section: Basic Concepts Of Hlsmentioning

confidence: 99%

Photopolymer Holographic Lenses for Solar Energy Applications: A Review

Alfaro,

Lloret,

Vilardy

et al. 2024

Polymers

6

0

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Holographic lenses (HLs) are part of holographic optical elements (HOE), and are being applied to concentrate solar energy on a focal point or focal line. In this way, the concentrated energy can be converted into electrical or thermal energy by means of a photovoltaic cell or a thermal absorber tube. HLs are able to passively track the apparent motion of the sun with a high acceptance angle, allowing tracking motors to be replaced, thus reducing the cost of support structures. This article focuses on a review of the materials used in the recording of a holographic lens (HL) or multiple HLs in photovoltaic and/or concentrating solar collectors. This review shows that the use of photopolymers for the recording of HLs enables high-performance efficiency in physical systems designed for energy transformation, and presents some important elements to be taken into account for future designs, especially those related to the characteristics of the HL recording materials. Finally, the article outlines future recommendations, emphasizing potential research opportunities and challenges for researchers entering the field of HL-based concentrating solar photovoltaic and/or concentrating solar thermal collectors.

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Dual-View Integral Imaging 3D Display Based on Multiplexed Lens-Array Holographic Optical Element

Cited by 12 publications

References 20 publications

Domain multiplexed computer-generated holography by embedded wavevector filtering algorithm

Domain multiplexed computer-generated holography by embedded wavevector filtering algorithm

Domain Multiplexed Computer-generated Holography by Embedded Wavevector Filtering Algorithm

Photopolymer Holographic Lenses for Solar Energy Applications: A Review

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