Holographic laser film: high-precision molding technology

1. The core of the production process of holographic laser film: holographic molding machine
In the production process of holographic laser film, the holographic molding machine undoubtedly plays a vital role. This is a high-precision device, and its design and manufacturing are the crystallization of the wisdom of modern science and technology. The main function of the holographic molding machine is to accurately transfer the information on the nickel plate carrying the holographic pattern to the film material.

During the embossing process, the holographic molding machine causes the film material to undergo a slight deformation at the microscopic level by applying precisely controlled pressure and temperature. This deformation is highly precise and controllable, which ensures that the holographic pattern on the nickel plate can be completely copied to the film. These tiny deformations form interference fringes that are consistent with those on the nickel plate, which are the basis for the holographic pattern on the holographic laser film.

The formation of interference fringes is a key step in holographic technology. They contain the light wave information of the object, including amplitude, phase and frequency. When these interference fringes are illuminated by laser, the light wave information is reproduced through interference and diffraction phenomena, thus presenting a three-dimensional stereoscopic image of the original object. This image not only has a high sense of reality and three-dimensionality, but also can present different visual effects as the viewing angle changes, bringing unprecedented visual experience to the audience.

The operation process of the holographic molding machine requires extremely high precision and stability. Before embossing, both the nickel plate and the film material need to be strictly cleaned and processed to ensure the flatness and cleanliness of the surface. Any tiny impurities or defects may have an adverse effect on the final holographic pattern. In addition, parameters such as temperature, pressure and time during the molding process need to be precisely controlled to ensure the clarity and stability of the holographic pattern.

2. Detailed explanation of the technical principle and production process of holographic laser film
The technical principle of holographic laser film is based on holographic technology, which is a technology that uses the interference and diffraction principles of light to record and reproduce the real three-dimensional image of an object. The uniqueness of holographic technology is that it can record all the light wave information of an object, not just the shape or color of the object. This makes the holographic image extremely realistic and three-dimensional, and can present the complete form of the object in three-dimensional space.

The production process of holographic laser film is a complex and delicate process, which includes the following main steps:

Nickel plate production
Design stage: First, the original design of the holographic pattern needs to be created according to customer needs or design concepts. This design can be an abstract pattern, a specific object image, or a text or logo with a specific meaning.
Laser exposure: Next, a high-precision laser device is used to expose the design pattern to a photoresist-coated substrate. The accuracy and energy density of the laser are key to ensuring the clarity of the pattern.
Chemical etching: The exposed substrate is chemically etched, and the unexposed photoresist is removed, leaving a concave and convex pattern corresponding to the original design. This concave and convex pattern is the basis for the production of nickel plates.
Electroforming: Finally, a layer of nickel metal is deposited on the substrate with a concave and convex pattern through an electroforming process to form a nickel plate carrying a holographic pattern. The nickel plate has a high degree of hardness and wear resistance, which can ensure the stability and durability of the pattern during the molding process.
Film material preparation
Material selection: The selection of film materials is crucial to the quality of holographic laser film. Usually, film materials with good optical and mechanical properties are selected, which can withstand the pressure and temperature changes during the molding process while maintaining the stability of their optical properties.
Material processing: After selecting the film material, a series of processing is required, including cleaning, drying, coating, etc. Cleaning is to remove impurities and oil stains on the surface of the material; drying is to ensure that the material will not produce bubbles or deformation due to water evaporation during the molding process; coating is to form a layer of photosensitive resin or photosensitive glue on the surface of the material so as to form interference fringes during the molding process.
Molding process
Alignment and embossing: Put the processed film material into the holographic molding machine and accurately align it with the nickel plate. Under the action of the molding machine, the holographic pattern on the nickel plate is accurately embossed onto the film material. In this process, parameters such as pressure, temperature and time need to be controlled to ensure the clarity and stability of the interference fringes.
Cooling and demolding: After the embossing is completed, the film material needs to be cooled in the molding machine for a period of time so that the photosensitive resin or photosensitive glue can solidify. Then, the film material is taken out of the molding machine to complete the demolding process.
Curing treatment
Ultraviolet irradiation or heating treatment: In order to further fix the embossed interference fringes, the film material needs to be cured. This is usually achieved by ultraviolet irradiation or heating. Ultraviolet irradiation can cause a chemical reaction in the photosensitive resin or photosensitive adhesive to form stable interference fringes; heating treatment can make the molecular chains in the material more closely arranged, enhancing the mechanical properties and durability of the material.
Quality inspection: After curing treatment, the holographic laser film also needs to be quality inspected. This includes appearance inspection, image clarity test, wear resistance test, etc. Only holographic laser films that pass quality inspection can be put on the market.