REFLECTIVE GEOMETRIC HOLOGRAPHIC FILM BASED ON TWO-DIMENSIONAL FEATURE, AND PREPARATION METHOD THEREFOR AND USE THEREOF

摘要

A reflective geometric holographic film based on a two-dimensional feature, and a preparation method therefor and the use thereof. The reflective geometric holographic film comprises a series of prismatic element prisms (3), of which the cross sections are pentagons (2) formed by combining a first right-angled triangle (1) or a rectangle (21) and a second right-angled triangle (22), with the prismatic element prisms being used for carrying out retro-reflection on light irradiated on same; and several transparent layers (31) and reflecting layers (32), which are spaced apart, are arranged in the prismatic element prism (3) in a length direction thereof, a layer of reflecting film (7) is arranged on an inclined plane (6) where a right-angled side of the cross section of the prismatic element prism (3) is located, and an error range of the right angles contained in the first right triangle (1) and the pentagon (2) and an angle formed by the reflecting layer (32) and the length direction of the prismatic element prism (3) is within +/-5°. According to the preparation method, by means of performing simple cutting and machining based on the two-dimensional feature, the process cost is low, large-scale and high-precision production is easily achieved, the element film is preferably a flexible element film, the product yield is high, and due to the flexible feature, the holographic film can meet the requirements of folding and winding for storage.