Silicone product optical plating refers to the process of plating metal (or dielectric) film (or multi-layer metal) on the surface of optical parts. The purpose of surface coating of optoelectronic device is to reduce or increase the reflectivity, beam splitting, color separation, filtering and polarization of light. The commonly used coating methods are vacuum plating (physical plating) and chemical plating.
optical coating principle:
negative pressure electroplating mainly refers to the need for electroplating under higher vacuum, including vacuum ion evaporation, magnetron sputtering , MBE molecular beam epitaxy, PLD laser sputtering deposition, etc., so. evaporator and sputterer are common. The base material is made of coating material, and the coating material is used as target material or medicinal material. The substrate and target are in the same vacuum state.
The evaporation layer is usually the target of heating to evaporate the surface components into radicals or ions, which are then synthetically deposited on the substrate, film layer. Regarding sputter coating, it is easy to understand that the target material is bombarded by electrons or high-energy lasers, and the surface components are sputtered in the form of free radicals or ions, and finally deposited on the surface of the substrate to form a thin film.
Commonly used optical coating materials include the following:
colorless crystalline powder with high purity. Use it to prepare optical coating , which can improve light transmittance without causing collapse points.
Colorless transparent crystal with high melting point, hardness and good chemical stability. The high-quality Si02 coating prepared by this process has a good evaporation state and no collapse point. According to the use, it can be divided into ultraviolet, infrared and visible light.
Heavy crystalline state, high refractive index, good high temperature resistance, stable chemical properties, high purity, can produce high-quality zirconia coating without collapse point.
