What are the three elements of polarizer manufacturing?

The three elements of polarizer manufacturing are radiation resistance, fatigue resistance and wear resistance. Polarizers are widely used, not only as polarizing materials on liquid crystal displays, but also for sunglasses, anti-glare goggles, optical filters of photographic equipment, anti-glare treatment of car headlights and dimmer, polarizing microscopes and special medical glasses.

Classification of polarizers

Polarizers are classified by function: transmissive polarizer, reflective polarizer, transflective polarizer and compensation polarizer. Polarizers are classified according to dyeing methods: iodine polarizer and dye polarizer.

Iodine-based polarizer is the combination of polyvinyl alcohol and iodine molecules, and it is the most important method to produce polarizing film at present. It is easy to obtain high transmittance and high polarization optical properties, but it has poor high temperature and high humidity resistance. Dye-type polarizer absorbs dichroic organic dyes on PVA and extends, so it is not easy to obtain high transmittance and high polarization optical characteristics, but it has good high temperature and high humidity resistance.

Metal polarizer: metal salts such as gold, silver and iron are adsorbed on polymer films and then reduced to make rod-shaped metals have polarization ability. Now this method is no longer used in production. Ethylene polarizer: PVA is dehydrated with acid as catalyst, so that PVA molecules contain a certain amount of ethylene structure, and then stretched and oriented to make it have polarizing properties.