Holographic waveguide lens, preparation method thereof, and three-dimensional display apparatus

Abstract

The invention discloses a holographic waveguide lens, a preparation method therefor and a three-dimensional display apparatus using the preparation method. The lens comprises one, two, three or more holographic waveguide lens units; the holographic waveguide lens unit is provided with three functional regions, respectively, a coupling functional region for input a light coupling, a relay functional region for X-direction image diffusion and an exit functional region for Y-direction image diffusion and output; the functional region is provided with a nano-diffraction grating. By setting the functional region, the volume of the three-dimensional display apparatus can be greatly reduced, and the color display and the expansion of a field angle can be conveniently realized. The nano-diffraction grating has low cost and good quality stability, and is suitable for industrial production.

Description

technical field [0001] The invention relates to the technical field of display equipment, and more specifically, relates to a holographic waveguide lens, a preparation method thereof, and a three-dimensional display device. Background technique [0002] Augmented reality (AR) technology uses computer graphics technology and visualization technology to generate virtual objects that do not exist in the physical world, and accurately "place" them in the physical world, presenting users with a new environment with richer perception effects. In many fields, such as industrial manufacturing and maintenance, medical field, military field, entertainment game field, education field, etc., it has huge potential application value. In the AR industry chain, lenses with both transparency and imaging / light-guiding effects are the most critical components for the implementation of AR hardware. Domestic and foreign industries or scientific research circles have developed a series of AR len...

AI Technical Summary

Problems solved by technology

However, in the Microsoft holographic lens, in order to make the output image uniform in intensity throughout the observation range, the grating diffraction efficiency for the second functional area and the third functional area needs to be modulated according to the space. In conventional interference exposure technology, such a grating production method very low yield

In addition, in order to meet the phase matching conditions, the accuracy of the orientation of the grating grooves and the period of the grating in the three regions is extremely high, which brings great difficulties to the conventional interference exposure technology.

The above two problems lead to the extremely high production cost of Microsoft holographic lenses, making it difficult to promote the development of the entire AR product

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