Optical high-tech has gradually penetrated into all walks of life, and people's lifestyles have also undergone earth-shaking changes. With the changes of the times, optical coating technology is a very important part of it, such as daily mobile phone planes, cameras, displays, and Touch screens, etc., have been applied to optical coating surface treatment technology, and have also received special attention from the people, allowing us to feel the convenience of technology and the high-end visual impact brought by it, so many people are full of curiosity about optical pvd coating machines. Cheng Vacuum Xiaobian analyzes the structural components of the optical pvd coating machine for everyone, and hopes that everyone will have a new understanding of the optical pvd coating machine.

       The basic structure of the optical pvd coating machine consists of a vacuum system, an evaporation system, a cooling system, an electrical system, and an electrical control cabinet. The vacuum system consists of a vacuum cavity and an exhaust system. The vacuum tank is the main body of the coating machine, and the coating process is completed in the vacuum tank. The vacuum tank is connected to the exhaust system through a connecting valve. In order to prevent the influence of air molecules on sputtering ions and improve the quality of the film, the optical components and ion source must be placed in a vacuum environment during operation. The exhaust system is mainly composed of a mechanical pump, a Roots pump and a vacuum pump, which is responsible for discharging the gas in the vacuum tank and forming a vacuum environment in the tank. The evaporation system mainly refers to the part of the film forming device. There are many kinds of film forming devices in the coating machine, such as resistance heating, electron gun evaporation, magnetron sputtering, radio frequency sputtering, ion plating, etc.
        The optical pvd coating machine coats a thin film on the optical element by vacuum sputtering, so as to change the reflectivity and transmittance of the element to the incident light. At the same time, in order to reduce the reflection loss on the surface of the element as much as possible and improve the image quality, multi-layer films are often coated. After the optical element is coated, the light is reflected and transmitted multiple times on the surface of the multilayer film to form multi-beam interference. By controlling the thickness and refractive index of the film, different intensity distributions can be obtained. Using this principle, polarized reflective films, color splitting films, luminescent films and interference filters can be manufactured to meet more complex needs.
         Application fields and advantages of optical pvd coating machine, the surface of the optical film is smooth, the refractive index between the film layers can jump on the surface but the refractive index in the film layer is stable. The temperature rise of the base during the coating process of the optical coating machine is lower, so the optical coating machine can coat the surface of the temperature-sensitive components. For the coating of optical components, the optical coating machine has higher precision, more uniform coating and more stable optical performance. At present, optical coating machines have been widely used in optical communication, optical display, laser processing, aerospace and AR (Augmented Reality, augmented reality), VR (Virtual Reality, virtual reality) and other fields.