Reflective geometric holographic film based on two-dimensional characteristics and preparation method and application thereof

Abstract

The invention, which relates to the field of 3D display, discloses a reflective geometric holographic film based on two-dimensional characteristics and a preparation method and application thereof. the reflective geometric holographic film comprises a primitive membrane and a plurality of columnar primitive prisms that are arranged on the surface of the primitive membrane in an array manner and have cross sections in a right triangle shape. The surfaces where the bevel edges of the cross sections of the columnar primitive prisms are located are attached to the surface of the primitive film; and a plurality of transparent layers and reflecting layers which are arranged at intervals are arranged in the primitive film in the length directions of the columnar primitive prisms; a layer of reflecting film is arranged on the inclined plane where the right-angle side of the cross section of each columnar primitive prism is located, and the error range of the right angle included in the cross section of each columnar primitive prism and the angle formed by the transparent layer, the reflecting layer and the length direction of the columnar primitive prism is within + / -5 degrees. After simple cutting and machining based on two-dimensional characteristics, large-scale production is easy to achieve; the primitive film is preferably a flexible primitive film, the excellent rate of the product is high; and the product can meet the requirements for folding, winding, storage and the like due to the flexible characteristic.

Description

Technical field [0001] The invention relates to the field of 3D display, in particular to a reflective geometric holographic film based on two-dimensional features, and a preparation method and application thereof. Background technique [0002] 3D display technology that can display three-dimensional images in space will be the most important display technology in future life. At present, the mainstream 3D display is still a pseudo 3D display technology based on stereoscopic image pairing with binocular parallax. This kind of display method itself has many drawbacks, and at the same time it can cause problems such as user's visual fatigue, and it cannot become the mainstream display technology in the future. [0003] The display method that can form a real three-dimensional picture in the air and can display the three-dimensional picture in the most realistic way is the trend of future display technology development. At present, there are some technologies that can realize the fl...

AI Technical Summary

Problems solved by technology

At present, there are some technologies that can realize the suspended display in the air. For example, the scheme based on retroreflection and beam splitter can realize the suspended display of the image, but this kind of technology usually needs to use a microstructure screen with a series of very fine three-dimensional features.

For example, in the prior art, there are a series of triangular pyramid light reflective screens. Since the microstructures of these three-dimensional features are very fine, it is very difficult to arrange countless three-dimensional feature microstructures evenly and densely on a screen, and the processing accuracy is difficult to guarantee. , processing efficiency and yield are difficult to guarantee

[0004] The publication number is CN108269511A, an aerial suspension display system, which discloses a two-dimensional planar air imaging scheme, and discloses a retroreflective right-angled triangular prism array, which includes a series of light-reflecting screens of right-angled triangular prisms, This right-angled triangular prism can only realize the retroreflective imaging function in the plane. When the light is not parallel to the cross section, the retroreflective function cannot be realized. Other optical modules are needed to modulate the light to realize retroreflective imaging.

[0005] In addition, the above-mentioned right-angled triangular prism arrays are usually processed with hard optical materials, and hard materials are prone to breakage and residual stress during processing, resulting in low product yields and unable to meet the needs of folding, winding and storage.

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