Optical Waveguide Structure and AR Display Device

Abstract

The disclosure provides an optical waveguide structure and an AR display device. The optical waveguide structure includes: a waveguide substrate; a coupling-in area, the coupling-in area is arranged on the waveguide substrate; a plurality of diffraction grating areas, two side surfaces of the waveguide substrate are provided with the diffraction grating areas, a number of the diffraction grating areas on at least one side surface of the waveguide substrate is greater than or equal to 2, periods of the diffraction grating areas are equal, and the diffraction grating areas are configured to perform multiple pupil expansions on a light; and a coupling-out area, the coupling-out area is arranged on the waveguide substrate, the diffraction grating areas are all located between the coupling-in area and the coupling-out area, and the coupling-out area is configured to perform pupil expansion transmission on a light in the waveguide substrate and emit the light.

Dependencies are inferred from the claim text.