Volume holographic grating manufacturing device, volume holographic optical waveguide and manufacturing method and application thereof

Abstract

The embodiment of the invention provides a volume holographic grating manufacturing device, a volume holographic optical waveguide and a manufacturing method and application thereof. The manufacturing device comprises a laser light source, a light splitting unit, a first reflection unit, a second reflection unit, a first prism, a volume holographic film and at least one gradual change attenuation sheet; or the manufacturing device comprises a laser light source, a light splitting unit, a first reflection unit, a second reflection unit, a first prism, a second prism, a volume holographic film and at least one gradual change attenuation sheet. The manufacturing device is simple and high in yield. Meanwhile, the volume holographic optical waveguide can be manufactured by cutting the exposed volume holographic film. By means of the mode, large-scale mass production can be realized, and the production efficiency is improved. When the manufactured volume holographic optical waveguide is applied to near-eye display equipment, a large field angle and a large eye movement range can be realized.

Description

technical field [0001] The embodiments of the present invention relate to the field of optical technology, and in particular to a volume holographic grating manufacturing device, a volume holographic optical waveguide and a manufacturing method and application thereof. Background technique [0002] In optical display devices, augmented reality technology, as a technology that superimposes and projects the real world and the virtual world in front of users, is of great significance in military, industry, education, entertainment, transportation and other fields. [0003] Among them, due to the high difficulty and high production cost of the array optical waveguide and the embossed grating waveguide, the volume holographic optical waveguide is often used as the key display device of augmented reality. Among the volume holographic optical waveguides, the two-dimensional pupil-expanded volume holographic optical waveguide is a research hotspot in recent years. The two-dimensiona...

AI Technical Summary

Problems solved by technology

However, due to the optical sensitivity of the coated volume holographic dry plate material, it is necessary to expose the grating structure of the in-coupling, turning and out-coupling parts in a dark room at one time, which leads to a complicated optical path; in addition, the fabrication The complexity of the optical path and the contingency of the experiment also lead to low yield and the inability to achieve industrial mass production

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