Augmented reality displays and headsets

Abstract

The present invention provides an augmented reality display device and a head-mounted device. The augmented reality display device includes an optical machine and an optical waveguide; the optical waveguide includes an optical waveguide sheet and two metasurface gratings; both metasurface gratings include two strip-shaped units with the same height and different widths, and the two strip-shaped units are separated by The basic units are arranged in parallel at a distance, and the basic units are periodically arranged at a second distance; the strip-mounted units in the two metasurface gratings are symmetrically arranged; the height of the strip-like units is greater than or equal to one third of the minimum wavelength of the beam emitted by the optomechanical In one case, the light beam incident on the first metasurface grating is deflected to produce a phase difference proportional to the height of the strip element, and the light beam is deflected again and totally reflected when it enters the optical waveguide sheet, and exits from the second metasurface grating at Imaging of the human eye. By adopting the symmetrical structure of the two metasurface gratings, the invention can make the light efficiencies of different wavelengths and incident angles complement each other, so that the brightness of the image after pupil dilation is uniform.

Description

technical field [0001] The present invention relates to the technical field of metasurfaces, and in particular, to an augmented reality display device and a head-mounted device. Background technique [0002] Augmented reality (Augmented Reality, AR) is a brand-new human-computer interaction technology. Using augmented reality technology, it can simulate the real scene. It is an advanced computer human-machine interface with the basic characteristics of interactivity and conception. The development of 5th Generation Mobile Communication Technology (5G), 6th Generation Mobile Communication Technology (6G), artificial intelligence, big data and other technologies has further promoted the development of AR devices. develop. The display device of AR equipment usually consists of a miniature display screen and optical elements. The display devices of AR devices currently on the market are mainly composed of various micro-displays and optical elements such as prisms, free-form su...

AI Technical Summary

Problems solved by technology

[0004] The present invention provides an augmented reality display device and a head-mounted device, which are used to solve the problems in the prior art that the optical waveguide is prone to produce dispersion and ghosting, as well as the problems of image leakage caused by multi-level diffraction and dizziness caused by binocular parallax. It can realize color display through a single optical waveguide, improve diffraction efficiency, effectively suppress multi-level diffraction, and obtain better imaging effects, which can meet the needs of AR equipment

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