Results 11 to 20 of about 122,050 (289)

Contact lens holographic projection display based on curved volume-holographic optical element

ETRI Journal
Wearable devices for augmented reality (AR) have gained considerable atten-tion but research on contact lenses remains scarce. This study introduces an AR display that utilizes a contact lens integrated with a holographic projection display and a curved ...
Jin Su Lee
doaj   +2 more sources

Curved Holographic Augmented Reality Near-Eye Display System Based on Freeform Holographic Optical Element with Extended Field of View

Photonics
At present, most near-eye display devices adopt flat substrates, which have problems such as limited field of view (FOV) and bulky shape, while the curved structure is expected to expand the FOV with appropriate volume. In this paper, we propose a curved
Hong Xu, Yuan Xu, Changyu Wang, Juan Liu
doaj   +2 more sources

Verification of an Accommodative Response for Depth Measurement of Floating Hologram Using a Holographic Optical Element

Applied Sciences, 2020
Floating holograms using holographic optical element screens differ from existing systems because they can float 2D images in the air and provide a sense of depth.
Leehwan Hwang, Sungjae Ha, Philippe Gentet, Jaehyun Lee, Soonchul Kwon, Seunghyun Lee   +5 more
doaj   +2 more sources

A Study on Augmented 3D Display Optimization Based on Holographic Optical Element for High Depth and Magnified Image

Frontiers in Physics, 2021
Modern Pepper's ghost—“floating hologram”—systems generally use transparent screens called half mirrors or foils. this system must have the same screen size as the image size in order to display a large-sized image.
Sungjae Ha, Leehwan Hwang, Jaehyun Lee, Philippe Gentet, Soonchul Kwon, Seunghyun Lee   +5 more
doaj   +2 more sources

An edge-lit volume holographic optical element for an objective turret in a lensless digital holographic microscope. [PDF]

Sci Rep, 2020
In this paper, we propose and demonstrate the use of an edge-lit volume holographic optical element (EL-VHOE) as a reference waveguide to reduce the volume of a lensless digital holographic microscope.
Yu YW, Sun CC, Hsieh PK, Huang YH, Song CY, Yang TH.   +5 more
europepmc   +2 more sources

Pixelated volume holographic optical element for augmented reality 3D display.

Optics Express, 2022
Augmented reality (AR) three-dimensional (3D) display is the hardware entrance of metaverse and attracts great interest. The fusion of physical world with 3D virtual images is non-trivial.
Fei Lu, Jianyu Hua, Fengbin Zhou, Zhongwen Xia, Ruibin Li, Linsen Chen, Wen Qiao   +6 more
semanticscholar   +1 more source

Improving the Holographic Recording Characteristics of a Water-Resistant Photosensitive Sol–Gel for Use in Volume Holographic Optical Elements

Photonics, 2022
Continual improvements to holographic recording materials make the development of volume holographic optical elements increasingly more attainable for applications where highly efficient, lightweight diffractive optical elements can replace conventional ...
Brian Rogers, Tatsiana Mikulchyk, Mohamed Oubaha, Dervil Cody, Suzanne Martin, Izabela Naydenova   +5 more
doaj   +1 more source

360-degree mixed reality volumetric display using an asymmetric diffusive holographic optical element.

Optics Express, 2022
Volumetric display technique has a great advantage of displaying realistic three-dimensional contents with a 360-degree viewing angle. However, most volumetric displays cannot provide mixed reality because their screens inside the displays obstruct the ...
Moonseong Park, Hosung Jeon, Daerak Heo, Sungjin Lim, Joonku Hahn   +4 more
semanticscholar   +1 more source

Volume Holographic Hyperspectral Imaging [PDF]

, 2004
A volume hologram has two degenerate Bragg-phase-matching dimensions and provides the capability of volume holographic imaging. We demonstrate two volume holographic imaging architectures and investigate their imaging resolution, aberration, and ...
Barbastathis, George, Liu, Wenhai, Psaltis, Demetri   +2 more
core   +1 more source

A Novel Approach for Measurement of Free-Form Optical Elements with Digital Holographic Microscopy

Micromachines, 2022
Free-form optical elements face significant challenges in high-precision measurement due to their high complexity and non-rotational symmetry. Digital holographic microscopy (DHM), as one of the methods for the measurement of free-form optical elements ...
Xuhui Zhang, Chonglin Wu, Lei Chen, Gengliang Chen, Guoliang Zheng   +4 more
doaj   +1 more source