摘要：SummaryGlasses-free three-dimensional (3D) display is considered as a potential disruptive technology for display. The issue of visual fatigue, mainly caused by the inaccurate phase reconstruction in terms of image crosstalk, as well as vergence and accommodation conflict, is the critical obstacle that hinders the real applications of glasses-free 3D display. Here we propose a glasses-free 3D display by adopting metagratings for the pixelated phase modulation to form converged viewpoints. When the viewpoints are closely arranged, the holographic sampling 3D display can approximate a continuous light field. We demonstrate a video rate full-color 3D display prototype without visual fatigue under an LED white light illumination. The metagratings-based holographic sampling 3D display has a thin form factor and is compatible with traditional flat panel and thus has the potential to be used in portable electronics, window display, exhibition display, 3D TV, as well as tabletop display.Graphical AbstractDisplay OmittedHighlights•Metagratings are designed pixel by pixel to form converged viewpoints in 3D display•Holographic sampling 3D display reconstruct discrete light field•Video rate full-color display is reconstructed with a thin form factor•Vergence and accommodation conflict is eliminated by single eye accommodationOptical Imaging; Optical Physics; Wave Optics; Metamaterials
