Near-eye lightfield display: Difference between revisions
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Common technical approaches to generating the lightfield include: | Common technical approaches to generating the lightfield include: | ||
* '''[[Microlens Array]] (MLA) based:''' An array of tiny lenses is placed over a high-resolution [[display panel]] (like an [[OLED]] or [[LCD]]). Each microlens samples a portion of the underlying pixels and projects them in specific directions, creating different views for different parts of the eye's pupil. This technique is related to [[integral imaging]] or [[plenoptic]] | * '''[[Microlens Array]] (MLA) based:''' An array of tiny lenses is placed over a high-resolution [[display panel]] (like an [[OLED]] or [[LCD]]). Each microlens samples a portion of the underlying pixels and projects them in specific directions, creating different views for different parts of the eye's pupil. This technique is related to [[integral imaging]] or [[plenoptic camera]] principles<ref name="Lanman2013">Lanman, D., & Luebke, D. (2013). Near-eye light field displays. ''ACM Transactions on Graphics (TOG)'', 32(4), Article 138. Presented at SIGGRAPH 2013. [https://research.nvidia.com/sites/default/files/pubs/2013-11_Near-Eye-Light-Field/NVIDIA-NELD.pdf PDF Link]</ref>, but inherently trades [[spatial resolution]] for [[angular resolution]] (i.e., number of views or [[depth cue]]s). | ||
* '''Multi-layer Displays:''' Using multiple stacked, typically transparent, display layers (e.g., LCDs) that multiplicatively modulate light passing through them. By controlling the patterns on each layer, often using [[computational display]] techniques, the directional light distribution can be approximated, potentially offering more continuous focus cues<ref name="Huang2015">Huang, F. C., Wetzstein, G., Barsky, B. A., & Heide, F. (2015). The light field stereoscope: immersive computer graphics via factored near-eye light field displays with focus cues. ''ACM Transactions on Graphics (TOG)'', 34(4), Article 60. Presented at SIGGRAPH 2015.</ref>. | * '''Multi-layer Displays:''' Using multiple stacked, typically transparent, display layers (e.g., LCDs) that multiplicatively modulate light passing through them. By controlling the patterns on each layer, often using [[computational display]] techniques, the directional light distribution can be approximated, potentially offering more continuous focus cues<ref name="Huang2015">Huang, F. C., Wetzstein, G., Barsky, B. A., & Heide, F. (2015). The light field stereoscope: immersive computer graphics via factored near-eye light field displays with focus cues. ''ACM Transactions on Graphics (TOG)'', 34(4), Article 60. Presented at SIGGRAPH 2015.</ref>. | ||
* '''Varifocal / Multifocal Displays:''' Using optics whose focal length can be changed rapidly, such as [[Tunable lens|tunable lenses]] or mechanically actuated lenses/displays. These systems present images at different focal distances sequentially (time-multiplexed) or simultaneously. The visual system integrates these into a perception of depth, approximating a lightfield effect, particularly addressing accommodation<ref name="Akşit2019">Akşit, K., Lopes, W., Kim, J., Shirley, P., & Luebke, D. (2019). Manufacturing application-driven near-eye displays by combining 3D printing and thermoforming. ''ACM Transactions on Graphics (TOG)'', 38(6), Article 183. Presented at SIGGRAPH Asia 2019. (Discusses varifocal elements)</ref>. | * '''Varifocal / Multifocal Displays:''' Using optics whose focal length can be changed rapidly, such as [[Tunable lens|tunable lenses]] or mechanically actuated lenses/displays. These systems present images at different focal distances sequentially (time-multiplexed) or simultaneously. The visual system integrates these into a perception of depth, approximating a lightfield effect, particularly addressing accommodation<ref name="Akşit2019">Akşit, K., Lopes, W., Kim, J., Shirley, P., & Luebke, D. (2019). Manufacturing application-driven near-eye displays by combining 3D printing and thermoforming. ''ACM Transactions on Graphics (TOG)'', 38(6), Article 183. Presented at SIGGRAPH Asia 2019. (Discusses varifocal elements)</ref>. | ||