Design of a light-field near-eye display using random pinholes

68‐1: Investigation on Defocusing‐Induced Accommodation Shift in Microlens Array‐Based Near‐Eye Light Field Displays

“…With regard to the requirement of compactness in near-eye devices, among those methods, the MLA that enables integral imaging (InIm) brings about ultra-thin volume as well as high optical efficiency and very simple hardware for full color, compared with other VAC-mitigated display technologies. Thus, the MLA-based NE-LFD (NE-LFD for short in this paper) has been a research focus in these years [5][6][7][8][9][10][11]. Figure 1 shows the basic architecture of such a NE-LFD, where a 3D virtual image point is so generated that the chief rays emitted from several pixels in elemental images intersect at the image point in the virtual image space.…”

“…Regarding the visual discomfort, the near-eye light field display (NE-LFD) technology, which presents both positional and angular information of light, a.k.a., plenoptic functions, to mimic the light from real objects, has gained increasing attention along with other VAC-mitigated technologies such as volumetric display, multi-focal-plane display, retinal scan display, and holographic display [3]. NE-LFDs can be implemented through different plenopticfunction-generating methods [4][5][6][7][8][9][10][11], e.g., microlens array (MLA), pinhole array, layered directional backlights, and hologram. With regard to the requirement of compactness in near-eye devices, among those methods, the MLA that enables integral imaging (InIm) brings about ultra-thin volume as well as high optical efficiency and very simple hardware for full color, compared with other VAC-mitigated display technologies.…”

Augmented reality and virtual reality displays: emerging technologies and future perspectives

“…Regarding the approaches to solve the VAC issue, the most straightforward way is to integrate a tunable lens into the optical path, like a liquid lens 152 or Alvarez lens 99 , to form a varifocal system. Alternatively, integral imaging 153,154 can also be used, by replacing the original display panel with the central depth plane of an integral imaging module. The integral imaging can also be combined with varifocal approach to overcome the tradeoff between resolution and depth of field (DoF) [155][156][157] .…”

Challenges and Advancements for AR Optical See-Through Near-Eye Displays: A Review

“…Instead of conventional optics, their design uses only two simple hardware components: a LCD panel and an array of point light sources (implemented as an edge-lit, etched acrylic sheet) placed directly in front of the eye, out of focus. In 2019, Song et al proposed a new method for light-field NED in which random pinholes are used as a SLM and the method can help to solve the repeated zone problem with light-field displays (Song et al, 2019). Park introduced their pinhole based technology by adding a pinhole inside the optical path consisting of an optical combiner and a collimator.…”