Two-dimensional pupil-expanding binocular waveguide near-to-eye display device and augmented reality display equipment

Abstract

The invention relates to a two-dimensional pupil-expanding binocular waveguide near-eye display device and augmented reality display equipment, the two-dimensional pupil-expanding binocular waveguide near-eye display device comprises an optical-mechanical system for loading and outputting an image and emitting the collimated and corrected image to a coupling-in diffraction optical element group; the coupling-in diffraction optical element is formed by stacking and compounding a first polarization body holographic grating and a second polarization body holographic grating so as to be coupled into the left-hand circularly polarized light beam and the right-hand circularly polarized light beam respectively; the vertical pupil expanding optical waveguide is used for carrying out light ray expansion on the left-handed circularly polarized light beam and the right-handed circularly polarized light beam in the vertical direction so as to couple out multiple light rays to the glass substrate; the total reflection mirror deflects the light emitted by the vertical pupil-expanding optical waveguide at a preset angle and then emits the light into the glass substrate at a target angle capable of meeting a total reflection condition; the glass substrate is used for transmitting the light emitted by the vertical pupil-expanding optical waveguide to the coupling-out grating in a total reflection manner; and the coupling-out grating is used for coupling out the light rays to the left eye and the right eye of a person respectively.

Description

technical field [0001] The present disclosure relates to the technical field of augmented reality display, and in particular, to a two-dimensional pupil dilated binocular waveguide near-eye display device and an augmented reality display device. Background technique [0002] Augmented reality (AR) technology has been widely used in military, industrial design and manufacturing, medical, entertainment and education fields due to its unique feature of superimposing projected images to the real environment perceived by users. Even changing some information interaction methods in production and life in all walks of life has huge potential application value. [0003] In the AR near-eye display system, the core optical hardware part is the waveguide coupling element, and most of the waveguide coupling elements can only realize the exit pupil expansion of the light in the transmission direction of the waveguide, and the exit pupil perpendicular to the transmission direction of the ...

AI Technical Summary

Problems solved by technology

[0003] In the AR near-eye display system, the core optical hardware part is the waveguide coupling element, and most of the waveguide coupling elements can only realize the expansion of the exit pupil of the light in the waveguide transmission direction, and the exit pupil perpendicular to the waveguide transmission direction will be With the transmission of light in the waveguide, it gradually decreases. In order to ensure the exit pupil diameter at the wearing position of the human eye, the exit pupil of the optical-mechanical collimation system in front of the waveguide element needs to be large enough perpendicular to the transmission direction of the waveguide. At the same time, if you want Obtaining a larger field of view will lead to an increase in the size of the device, which will affect the user experience

Images