A kind of optical waveguide and its preparation method, augmented reality equipment

Abstract

Embodiments of the present invention provide an optical waveguide, a manufacturing method thereof, and an augmented reality device, which relate to the field of augmented reality technology and can reduce the thickness of the optical waveguide. The optical waveguide includes a dielectric layer and N strip-shaped semi-transparent and semi-reflective films carried by the dielectric layer. The plurality of semi-transparent and semi-reflective films are arranged in sequence along a first direction, and the first direction is perpendicular to the The thickness direction of the medium layer is perpendicular to the length direction of the strip-shaped semi-transparent and semi-reflective film, wherein every two adjacent semi-transparent and semi-reflective films have overlapping areas in the thickness direction of the medium layer; wherein , the N sequentially arranged semi-transparent and semi-reflective films are N continuous sub-surfaces divided into the same curved surface, and the sum of the heights of each of the sub-curved surfaces is the height of the curved surface; and each of the semi-transparent and semi-reflective films The concave side of each faces to the same bottom surface of the dielectric layer; N is a positive integer, and N≥2. Used to reduce the thickness of the optical waveguide.

Description

technical field [0001] The invention relates to the field of augmented reality technology, in particular to an optical waveguide, a preparation method thereof, and an augmented reality device. Background technique [0002] Augmented reality technology is a new technology that "seamlessly" combines real world information and virtual world information. Taste, touch, etc.), simulated by computer and other technologies and then superimposed, apply virtual information to the real world, and be perceived by human senses, so as to achieve a sensory experience beyond reality. Augmented reality technology not only shows the information of the real world, but also displays the virtual information at the same time, and the two kinds of information complement and superimpose each other. [0003] In order to realize augmented reality display, optical schemes of existing augmented reality devices such as AR (Augmented Reality, augmented reality) glasses include off-axis optics, prisms, f...

AI Technical Summary

Problems solved by technology

However, if figure 1 As shown, due to the need to consider the structure of the free-form surface 20, the thickness of the optical waveguide dielectric layer 10 is required to be relatively large, resulting in a relatively large thickness of the optical waveguide, generally around 10mm, and the increase in the thickness of the optical waveguide will lead to AR glasses. Increased weight, greatly reduced portability and aesthetics, thereby reducing user satisfaction

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