The reason why mobile phones, tablets, smart TVs and other devices can shine is inseparable from an important component material-optical film. What about the optical film?
Optical film refers to the coating or coating of one or more layers of dielectric film or metal film or a combination of these two types of films on optical components or independent substrates to change the transmission characteristics of light waves, including light projection and reflection. , absorption, scattering, polarization and phase changes, etc.
The main optical film devices include reflective film, anti-reflection film, polarizing film, interference filter and beam splitter, etc. They have been widely used in the national economy and national defense construction, and have gained increasing attention from scientific and technological workers. For example, the use of anti-reflection film can reduce the luminous flux loss of complex optical lenses by ten times; the use of high reflectance mirrors can double the output power of lasers; the use of optical films can improve the efficiency and stability of silicon photocells sex.
The characteristics of the optical film are: the surface is smooth, and the interface between the film layers is geometrically divided; the refractive index of the film layer can change abruptly on the interface, but it is continuous in the film layer; it can be a transparent medium or an absorbing film. Medium; can be normal uniform or normal inhomogeneous.
Optical film is the jewel in the display industry chain, with high barriers and high gross profit, and the market space is nearly 100 billion yuan.
The data shows that the upstream of the optical film industry chain is mainly PET particles, etc. Usually, the particles are stretched into base films, including: PVA film, TAC film, PET base film, etc.
The midstream optical base film can be further processed into various functional films by using optical grade coating equipment, UV curing machine and other production equipment.
The downstream is assembled into backlight modules, liquid crystal modules, polarizers, OCA optical glue and other components.
Terminal consumption is used in fields such as display equipment, optical communications, precision optical equipment, photovoltaics, and automotive decoration materials.
The "14th Five-Year Plan" clearly proposes to vigorously develop strategic emerging industries. In terms of functional membrane materials, water treatment membranes, optical membranes, photovoltaic EVA membranes, and lithium battery separators continue to benefit from the long-term growth of downstream demand. The policy continues to advance and industrial technology drives Under such circumstances, the industry is expected to benefit in the long run.