Three-dimensional display
A 3D display is a display gadget that can show solid-looking objects. It does this by using focal cues. Solidity can be generated using holographic displays and light field displays. 3D displays work by showing different focal depths at the same time. The term can also refer to a multiple viewpoint display.
3D displays connected to a computer system can enable a 3D human-computer interaction loop, which can be used in 3D software for design. A 3D display shows depth cues based largely on focus and/or binocular disparity.
Holography is theoretically not necessary for a full 3D display. A light field display is a type of display that can show full proper focus. 3D displays can be world-fixed, like mounted on a desk, or they can be head fixed, like built into a VR headset.
Approaches
There are multiple ways to get a 3D display to show proper focus, thereby giving proper accommodation cues. A light field display sends focal stacks of images based on rays to the eye.
Multifocal displays are displays that show multiple focus images at the same time, so that the eye can choose what to focus on.
A partial form of 3D displays is to use biscopy or autobiscopy using parallax barriers.
Gregg Favalora's paper, Three-Dimensional Displays: A Review and Applications Analysis makes reference to 3D displays as ranked in order of importance in the field of multiple viewpoint, where the paper treats motion parallax of the head as the most important factor.
A satisfying and effective three-dimensional image will happen.[1]
An accommodation-supporting display is a display that supports displaying content with depth cues that are perceived due to accommodation of the eye.
Two view
A two-view 3D display is a kind of display that generates two separate viewing zones, one for each eye.[2] The category includes simple handheld fixed-image stereoscopes, some types of head-mounted displays, and some types of autostereoscopic head tracked display.[2]
Autostereoscopic
An autostereoscopic display is a type of stereoscopic 3D display that works with free eyes in the air. It is the display at a distance, and the viewer's eyes, and it looks 3D. "Autostereoscopic" literally means self-solid-view, meaning it itself shows something that looks solid to the viewer. Typically, it is a flat-focus binocular autostereoscopic display. Autostereoscopic displays based on parallax barrier and lenticular methodologies have been known for about 100 years.[3]
References
- ↑ Dormehl, Luke (2021-04-01). "Feast Your Eyes on This Giant, Room-Sized Hologram Generator". https://www.digitaltrends.com/computing/3d-volumetric-display-led-pulse/.
- ↑ Jump up to: 2.0 2.1 Holliman, Nicolas S.; Dodgson, Neil A.; Favalora, Gregg E.; Pockett, Lachlan (2011). "Three-Dimensional Displays: A Review and Applications Analysis". IEEE Transactions on Broadcasting 57 (2): 362–371. doi:10.1109/TBC.2011.2130930. ISSN 0018-9316.
- ↑ "On aspects of glasses-free 3D cinema 70 years ago". Veritas et Visus. 2013-12-01. https://openrepository.aut.ac.nz/items/a35ec24a-d314-4d6c-a8cd-87ffdc853f7a.