Optical waveguide structure and near-eye display

Abstract

The invention provides an optical waveguide structure and a near-eye display. The optical waveguide structure comprises an optical waveguide sheet, a coupled grating which is a two-dimensional grating, a plurality of turning gratings, and a plurality of coupling-out gratings; the plurality of turning gratings at least comprise two turning gratings, the two turning gratings are respectively arranged on the same or different surfaces of the optical waveguide sheet, the projections of the two turning gratings on the optical waveguide sheet are arranged at an angle, and the turning gratings are used for receiving light of a coupling-in grating; the coupling-out gratings are used for receiving light of the coupling-in grating and the turning grating and coupling the light out of the optical waveguide sheet, the multiple coupling-out gratings at least comprise a first coupling-out grating and a second coupling-out grating, the first coupling-out grating is a one-dimensional grating, the second coupling-out grating is a two-dimensional grating, the first coupling-out grating and the second coupling-out grating are located on different surfaces of the optical waveguide sheet, and the projection of the first coupling-out grating and the projection of the second coupling-out grating on the optical waveguide sheet coincide. The problem that an optical waveguide structure in the prior art is poor in imaging effect is solved.

Description

technical field [0001] The invention relates to the technical field of optical imaging equipment, in particular to an optical waveguide structure and a near-eye display. Background technique [0002] With the development of society and the continuous innovation of science and technology, virtual reality (VR), augmented reality (AR) and mixed reality (MR) have gradually entered people's lives, among which optical waveguide technology is indispensable in AR augmented reality In the first step, it uses a flat optical waveguide with a diffraction grating to transmit the image emitted by the light source component and expand the pupil to the human eye, so that the user can observe the virtual image superimposed on the world projected by the light source component while seeing the real world. [0003] There are a variety of design schemes on the market, but the display effect is not ideal. The reason is that the transmission of light in the optical waveguide will cause loss of lig...

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide an optical waveguide structure and a near-eye display to solve the problem of poor imaging effect in the optical waveguide structure in the prior art

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