Optical display apparatus

An optical display device, comprising an image generation device, a coupling device and an optical expansion waveguide, wherein the coupling device corresponds to the image generation device and is configured to couple light output by the image generation device into the optical expansion waveguide;

• the optical expansion waveguide comprises at least a first reflective surface array and a second reflective surface array, and light entering the optical expansion waveguide passes through the first reflective surface array and the second reflective surface array in sequence, wherein each reflective surface array of the first reflective surface array and the second reflective surface array is configured to expand light propagating through the optical expansion waveguide in a dimensional direction, such that the light entering the optical expansion waveguide is expanded in two dimensional directions, and emit the light out of the optical expansion waveguide to form an image;
• and
• at least one of first reflective surfaces of the first reflective surface array and second reflective surfaces of the second reflective surface array is at least partially curved, so that an image distance of the image formed by the light emitted from the optical expansion waveguide meets a preset requirement.