Super multi-view near-eye display with a lightguide combiner

Abstract

We propose a lightguide-type super multi-view near-eye display that uses a digital micromirror device and a LED array. The proposed method presents three-dimensional images with a natural monocular depth cue using a compact combiner optics which consists of a thin lightguide and holographic optical elements (HOEs). Feasibility of the proposed method is verified by optical experiments which demonstrate monocular three-dimensional image presentation over a wide depth range. We also analyze the degradation of the image quality stemming from the spectral spread of the HOEs and show its reduction by a pre-compensation exploiting an adaptive moment estimation (Adam) optimizer.

Research Progress of Large Viewing‐Area 3D Holographic Near‐Eye Display

“…[54] Then, Han et al proposed a more compact light guide configuration in the holographic near-eye system, where two reflection-type in-/out-coupler HOEs were used to extract the different light sources toward their respective focal points without the requirement for additional lenses and mirrors (Figure 4b). [55] As long as the switching speed of SLM was fast enough, the dense viewpoints in space could be formed with time multiplexing.…”

“…Moreover, Li et al proposed to introduce the tunable liquid crystal grating in the holographic display system to modulate the diffraction light of SLM and combine the timemultiplexing technique to increase the viewing angle and image size at the same time. [58] As was shown in Figure 4d, the grating [54] b) the HOE, [55] c) the cholesteric liquid crystal holographic lenses, [57] and d) a tunable liquid crystal grating. [58] a) Reproduced with permission.…”

“…Figure 4. Optical path diagram of the holographic near-eye display based on the time multiplexing technique implemented by a) a light source array,[54] b) the HOE,[55] c) the cholesteric liquid crystal holographic lenses,[57] and d) a tunable liquid crystal grating [58]. a) Reproduced with permission [54].…”

Video see-through super multi-view near eye display using waveguide-type light source and ferroelectric liquid crystal on silicon

“…The SMV scheme captures multiple images of deep depth of field (DoF) from slightly different positions and projects them onto the corresponding positions in the eye pupil 5 . The pitch between each captured and projected viewpoint is set to be smaller than the eye pupil size, allowing the user to observe multiple viewpoints and sense the 3D information even in a monocular view.…”

Maxwellian near-eye display with correct focusing and defocusing cues based on light field refocusing technology

“…Maxwellian near-eye display can provide the always in-focus images regardless of the focus depth of human eyes. Compared with light field displays, such as integral imaging display [2][3][4], multi-directional backlight display [5,6], multi-plane display [7][8][9][10], super multiview display [11][12][13][14], and holographic display [15][16][17][18], the Maxwellian near-eye display has the advantages of high resolution and high optical efficiency in relatively compact optical system configuration [19][20][21][22][23][24][25][26][27]. In visuospatial perception, human eyes obtain four kinds of physiological depth cues, which are binocular parallax, motional parallax, accommodation cue, and convergence cue [28][29][30].…”