Metasurface micro-nano structure monolithic full-color waveguide lens and AR display device

Abstract

The invention discloses a metasurface micro-nano structure monolithic full-color waveguide lens and an AR display device. The metasurface micro-nano structure full-color waveguide lens comprises a waveguide substrate, a coupling-in grating and a coupling-out grating. The coupling-in grating and the coupling-out grating are a plurality of one-dimensional rectangular micro-nano structure metasurface gratings, are located on the surface of the waveguide substrate and are distributed at the two ends of the waveguide substrate; in each period, the coupling-in grating and the coupling-out grating are respectively provided with a plurality of sub-wavelength width rectangular micro-nano metasurface structures. Compared with a conventional grating, the metasurface grating has the resonance effect of different wavelengths, and can have high and balanced first-level transmission diffraction efficiency on red light, green light and blue light at a large incident angle. The lens is large in field angle and high in visual experience, full-color display can be achieved only through a single waveguide lens, and the AR display device adopting the waveguide lens is light in weight and good in wearable performance. Compared with a common grating, the plurality of rectangular micro-nano structure metasurface gratings are more in design variables, flexible in design and easier to process.

Description

Technical field[0001]The present invention relates to the field of transmission grating and the technical field, and more particularly to a super color waveguide lens and an AR display device of a super-surface micro-tube structure.Background technique[0002]Augment Reality; AR) technology is a technique that integrates virtual information with real world. AR eye-catching device represented by AR glasses, passes a series of optical imaging elements to human eye, and its perspective makes real scenes simultaneously. AR glasses wearer can see a real world that superimposes the virtual picture, and the real experience is greatly enhanced. Based on the above features, AR technology has a wide range of application prospects in industrial design, mechanical manufacturing, architecture, education, military and entertainment.[0003]Optical imaging components are used for optical transmission and imaging, and it is the key to the AR glasses. Currently mature optical imaging solutions mainly in...

AI Technical Summary

Problems solved by technology

However, most of the reported diffraction gratings use a single rectangular, triangular or helical tooth design, which contains few variables, has a small degree of design freedom, obtains a small field of view, narrow response spectrum, and low efficiency. Incident light causes large fluctuations in efficiency

In order to achieve full-color display, multi-waveguide lens superposition technology is often required, resulting in the entire imaging system being heavy and poorly wearable

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