Reflection holography thin film and preparation method thereof

Abstract

The invention provides a reflection holographic thin membrane and a preparation method thereof. The reflection holography membrane comprises a basement membrane, a buffer layer which is coated at one side of the basement membrane, a photopolymer coating which is coated at the other side of the buffer layer and formed by the holographic polymer paints, and a protective membrane which is covered on the surface of the photopolymer; wherein, hologram images or the interference fringes of double discoloration pictures are recorded on the photopolymer coating; the photopolymer coating comprises film-forming agents, a nano-composite pre-polymer, a monomer, photo initiators, chain transfer agents and photo sensitizers; the nano-composite pre-polymer is a product which is prepared by alkenyl unsaturated monomer with an unsaturated group at the terminal position and nano-particles. The invention has high sensitivity, high reflection efficiency, high refractivity modulation value, long storage life and little influence of the environment on the hologram images; the recorded images are treated by photo-curing and heat-enhancement and can reach reflected images and double discoloration images with the reflection efficiency of more than 99.9 precent, so mass production is available.

Description

technical field [0001] The invention relates to a reflective holographic film and a preparation method thereof. Background technique [0002] The production of reflection holograms is limited to the fact that the recorded interference fringes are different from rainbow holograms, most of which are parallel to the surface of the recording medium, and cannot be copied mechanically, but can only be copied optically. The appearance of holograms is usually achieved through the contrast of interference fringes. There are many types of materials used to record reflection holograms, but there are fewer ideal recording materials, and fewer materials that can be used for large-scale production. More often, silver salts and gelatin dichromate and a photopolymer material as disclosed in US3,658526 patent are used. [0003] The silver salt recording material has high sensitivity, and its interference fringes are realized by the black and white contrast of the photosensitive material, b...

AI Technical Summary

Problems solved by technology

But it also has many deficiencies, such as low sensitivity, short storage life, photosensitive plate needs to be produced at any time, and the material needs wet processing after imaging, and the hologram is greatly affected by the environment. It is easy to disappear in an environment with high humidity;

[0005] And photopolymer material, as the photopolymer in the disclosed material of US3,658526 patent, realizes the interference fringe display by the different refractive index of two kinds of polymers, although it can overcome the shortcoming of silver salt and dichromated gelatin, But they have limited visual response to visible light, have been limited to transmission holograms due to resolution, and have poor reflection efficiency when used in reflection holograms

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