Flat focus: Difference between revisions
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Research and development efforts are actively exploring solutions to overcome the limitations of flat focus, primarily aiming to resolve the VAC: | Research and development efforts are actively exploring solutions to overcome the limitations of flat focus, primarily aiming to resolve the VAC: | ||
* '''[[Varifocal display|Varifocal Displays]]:''' These systems can dynamically adjust the focal plane of the headset to match the depth of the virtual object the user is looking at. This can be achieved through various methods: | * '''[[Varifocal display|Varifocal Displays]]:''' These systems can dynamically adjust the focal plane of the headset to match the depth of the virtual object the user is looking at. This can be achieved through various methods: | ||
**Mechanically moving the lenses or displays. | |||
**Using [[liquid lens|liquid crystal lenses]] or other electronically tunable optical elements. | |||
**Employing deformable membrane mirrors<ref name="MembraneMirrorVarifocal">Rathnayake, A. U., Nguyen, T., & Zhan, T. (2021). Varifocal near-eye display using a focus-tunable Alvarez lens. ''Optics Express, 29''(19), 30935-30947. doi:10.1364/OE.436385</ref>. | |||
* '''[[Multifocal display|Multifocal Displays]]:''' These designs present images on multiple distinct focal planes simultaneously or in rapid succession, allowing the eye to focus more naturally on the plane closest to the target object's depth<ref name="MultifocalDisplays">Mercier, T., Ito, Y., & Kawahito, S. (2017). Multi-focal augmented reality display using time-multiplexed focal planes. ''Optics Express, 25''(23), 28633-28645. doi:10.1364/OE.25.028633</ref>. | * '''[[Multifocal display|Multifocal Displays]]:''' These designs present images on multiple distinct focal planes simultaneously or in rapid succession, allowing the eye to focus more naturally on the plane closest to the target object's depth<ref name="MultifocalDisplays">Mercier, T., Ito, Y., & Kawahito, S. (2017). Multi-focal augmented reality display using time-multiplexed focal planes. ''Optics Express, 25''(23), 28633-28645. doi:10.1364/OE.25.028633</ref>. | ||
* '''[[Light field display|Light Field Displays]]:''' These advanced displays aim to replicate the way light rays travel in the real world, providing correct focus cues by presenting slightly different information depending on the viewing angle and position of the pupil. The eye can then potentially focus naturally at different depths within the captured light field<ref name="LightfieldVR">Lanman, D., & Luebke, D. (2013). Near-eye light field displays. ''ACM Transactions on Graphics (TOG) - Proceedings of ACM SIGGRAPH Asia 2013, 32''(6), Article 220, 1–10. doi:10.1145/2508363.2508364</ref>. | * '''[[Light field display|Light Field Displays]]:''' These advanced displays aim to replicate the way light rays travel in the real world, providing correct focus cues by presenting slightly different information depending on the viewing angle and position of the pupil. The eye can then potentially focus naturally at different depths within the captured light field<ref name="LightfieldVR">Lanman, D., & Luebke, D. (2013). Near-eye light field displays. ''ACM Transactions on Graphics (TOG) - Proceedings of ACM SIGGRAPH Asia 2013, 32''(6), Article 220, 1–10. doi:10.1145/2508363.2508364</ref>. | ||