24/7 Space News
Integral imaging-based tabletop light field 3D display with large viewing angle
Principle of the tabletop light field 3D display with a large viewing angle.
Integral imaging-based tabletop light field 3D display with large viewing angle
by Staff Writers
Beijing, China (SPX) May 15, 2023

Light field 3D display is an innovative glasses-free 3D display technology that provides a more accurate reconstruction of 3D information than 2D and traditional 3D displays. With its ability to produce realistic, vivid, and intuitive 3D images, it has a good potential for development.

In particular, the tabletop light field 3D display provides a new display form that combines the features of a real-world tabletop and a digital 3D display. This allows users to interactively share and view 3D images while sitting or standing around the display for collaborative work and interaction. This technology has potential for applications in the fields of electronic sand tables, conference, tabletop games, and so on.

The key to a good 3D tabletop viewing experience is achieving a large 3D viewing angle in the radial direction, which enables users to view correct 3D images from large oblique viewing positions without having to cling to the table. Additionally, correct perspective and parallax in the radial direction are also essential. However, a large radial viewing angle and correct radial perspective and parallax are still out of reach in current research results due to limited spatial information.

Fortunately, by employing light field 3D display technology with full parallax, it is possible to achieve correct perspective and parallax in the radial direction. By developing a control scheme for reconstructed light rays that allow for a large viewing angle, it is possible to achieve both a large viewing angle and correct perspective and parallax in the radial direction simultaneously.

The authors of this article report a tabletop light field 3D display based on integral imaging. This work achieved a large radial viewing angle of 68.7 degrees in a large display size of 43.5 inches, with smooth and correct perspective and parallax in the radial direction.

The authors have developed a compound lens array with a large relative aperture based on the discrete light field reproduction concept in integral imaging. This lens array modifies the direction of light rays emerging from 2D display pixels in a wide range of space, ensuring that light emerging from 3D image points exits at a large angle and then reaches the human eyes around.

The tabletop light field 3D display comprises three main components, namely an ultra-high-resolution LCD panel with 7680 + 8640 pixels, a compound lens array consisting of thousands of compound lens units arranged in a regular hexagonal pattern, and a light shaping diffuser screen. Each compound lens unit contains three lenses arranged along a common axis, and the compound lens array design focuses on balancing the parameters of depth of field and 3D spatial resolution, which are constrained by the 3D viewing angle. Additionally, the imaging quality is superior at large field angles compared to central field angles.

In addition to developing the large viewing angle tabletop light field 3D display, the authors also report a light field capture model. Unlike the traditional rectangular plenoptic maps, this model features a parallelogram shape, with inclined lines representing the parallax images captured by the cameras. The capture model serves as theoretical guidance for 3D rendering technology based on backward ray-tracing.

The authors built a prototype of the tabletop light field 3D display. The prototype offers a radial 3D viewing angle range of -34.4 degrees to 34.3 degrees, resulting in a total radial 3D viewing angle of 68.7 degrees.

To quantitatively demonstrate 3D display performance at large viewing angles, the authors reproduced the USAF-1951 resolution test chart using their display prototype. , the 3D resolution almost remains consistent as the circumferential angle increases under the same radial viewing position. This indicates that the 3D resolution level remains stable, highlighting the display's reliability and suitability for the use of requiring a large viewing angle.

Research Report:Integral imaging-based tabletop light field 3D display with large viewing angle

Related Links
School of Instrumentation Science and Opto-electronics Engineering
Space Technology News - Applications and Research

Subscribe Free To Our Daily Newsletters

The following news reports may link to other Space Media Network websites.
Upcoming ISS project will test 3D materials for satellite manufacturing
Kennedy Space Center FL (SPX) May 12, 2023
As 3D printed rockets, car parts, and even homes begin to hit the market on Earth, L3Harris Technologies aims to leverage the International Space Station (ISS) National Laboratory in its search for durable materials to 3D print satellite components. Before 3D printed materials can be used to build more sustainable and efficient parts for spacecraft, they must be tested to ensure they can withstand the harsh environment of low Earth orbit (LEO). Among the payloads launching on SpaceX's upcoming 27t ... read more

Singapore to host Prince William's Earthshot Prize

NASA launches SBIR Ignite Catalyst Program for founders and entrepreneurs

Virgin to launch commercial spaceflights in June

Prep in the pool for Europe's next astronauts

Rocket Lab to launch small satellite swarm for NASA

New standard will aid in development of spaceport descriptions

China's reusable experimental spacecraft successfully lands

Phantom Space and Quub sign multiple launch agreement

Chasms on the flanks of a Martian volcano

Element-ary, My Dear WATSON

Ubajara drill site gets green light: Sols 3823-3824

Check And Double Check: Sols 3821-3822

Tianzhou 6 docks with Tiangong space station

China's cargo craft Tianzhou 6 ready for launch

Tianzhou-5 cargo craft separates from China's space station

Final frontier is no longer alien

Toshiba posts 35% decline in full-year net profit

Sidus Space selected by OneWeb to manufacture satellite hardware

Sidus Space expands global ground site network with new ATLAS contract

How NASA's work led to commercial spaceflight revolution

Upcoming ISS project will test 3D materials for satellite manufacturing

Terran Orbital PTD-3 enables 200Gbits space-to-ground optical link

Integral imaging-based tabletop light field 3D display with large viewing angle

NASA and partners achieve fastest space-to-ground laser comms link

Bacteria survive on radioactive elements

Researchers measure the light emitted by a sub-Neptune planet's atmosphere for the first time

Invading insect could transform Antarctic soils

Webb takes closest look yet at mysterious planet

NASA: Up to 4 of Uranus' moons could have water

New video series captures team working on NASA's Europa Clipper

Work continues to deploy Juice RIME antenna

Juice's first taste of science from space

Subscribe Free To Our Daily Newsletters


The content herein, unless otherwise known to be public domain, are Copyright 1995-2023 - Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principals for news reporting and research purposes. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA news reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. All articles labeled "by Staff Writers" include reports supplied to Space Media Network by industry news wires, PR agencies, corporate press officers and the like. Such articles are individually curated and edited by Space Media Network staff on the basis of the report's information value to our industry and professional readership. Advertising does not imply endorsement, agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. General Data Protection Regulation (GDPR) Statement Our advertisers use various cookies and the like to deliver the best ad banner available at one time. All network advertising suppliers have GDPR policies (Legitimate Interest) that conform with EU regulations for data collection. By using our websites you consent to cookie based advertising. If you do not agree with this then you must stop using the websites from May 25, 2018. Privacy Statement. Additional information can be found here at About Us.