Optical waveguide device and near-to-eye display equipment

Abstract

The invention discloses an optical waveguide device. A first optical element diffracts a light beam propagating in a waveguide substrate so as to change the propagation form of at least a part of the light beam. The first optical element comprises periodically arranged unit structures, and preset parameters of the unit structures change along with the positions of the unit structures, so that the sum of energy of propagation form change parts of light beams with large propagation step lengths at all positions in the same range can be obtained; the sum of the energy of the changing parts of the propagation forms of the light beams with the small propagation step lengths tends to be consistent with the sum of the energy of the changing parts of the propagation forms of the light beams with the small propagation step lengths in the same range, and image information distortion caused by uneven coupling-out energy of the light beams with different propagation step lengths in an existing optical waveguide scheme can be improved. The invention further discloses near-to-eye display equipment.

Description

technical field [0001] The invention relates to the technical field of optical devices, in particular to an optical waveguide device. The invention also relates to a near-eye display device. Background technique [0002] The near-eye display device is a device used to realize augmented reality display. It is usually worn in the same way as ordinary glasses. Its characteristic is that it can pass through the light emitted by objects in the real world and can also enter the light of virtual images into the human eye. [0003] The imaging system of the near-eye display device includes two parts: an optical-mechanical system and an optical waveguide. The optical-mechanical system is a micro-projector or a screen, which is responsible for converting electrical signals into optical signals and outputting virtual images; the optical waveguide is responsible for converting the output The virtual image light is transmitted to the position in front of the human eye, and the light ent...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide an optical waveguide device, which can improve the distortion of image information in existing optical waveguide solutions

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