The present invention relates to an optical
waveguide device and a preparation method thereof, an AR near-eye
display device and applications thereof, wherein a super-
surface structure layer is stacked on the outer surface of the
coupling end of the optical
waveguide device, and the light emitted by the
light source device is directly or indirectly coupled into the optical
waveguide through the super-
surface structure layer for propagation. The super-
surface structure layer is configured to phase-modulate the
first light beam emitted to the super-surface structure layer, so that the second
light beam emitted from the super-surface structure layer has collimation and directionality. The light entering the optical waveguide has collimation and directionality to improve the
coupling efficiency of light, thereby improving the
utilization rate of
light energy and display brightness. The optical waveguide device plus the
light source device of the present application constitute an AR near-eye
display device, which can be applied to naked-eye 3D
light field display. The super-surface structure layer not only realizes the collimation and directionality of the light emitted by the display panel, improves the light efficiency and brightness, but also facilitates the realization of the light-weight and thin display optical
machine.