Glass lenses

The main raw material of glass lenses is optical glass, which has excellent optical properties. Its light transmittance and mechanical and chemical properties are good, with constant indicators and stable physical and chemical properties. Second, spectacle lenses have a higher index, typically the highest index used for lens applications is 1.9. Finally, the surface hardness of the glass lens is higher and more resistant to scratches, but due to the material problem, the weight of the glass lens is heavier, which affects the wearing comfort to a certain extent. In addition, glass lenses themselves are fragile, especially with the improvement of resin lens technology and technology, the use of glass lenses has become less and less in recent years.

Resin lenses

Resin is a HC (hydrocarbon) secretion from plants, especially conifers. It is valued for its special chemical composition.

There are two types of resins: natural resins and synthetic resins. The resin lens is made of resin, which is synthesized, compounded, processed and polished. The advantages of resin lenses are obvious, light weight and more comfortable to wear. Second, resin lenses have excellent impact resistance, are less fragile and are safer. And the resin lens has good light transmittance, because the resin lens is easy to reprocess, so it can meet the special needs. Finally, with the innovation and promotion of coating technology, resin lenses have excellent anti-scratch function and become the mainstream of lenses in the market.

PC lens

PC lenses can also be called space lenses, and their chemical name is polycarbonate. Tough and unbreakable, it prevents lens breakage during strenuous activity. At the same time, PC lenses are light in weight, only 2g per cubic centimeter, and have characteristics far exceeding UV. PC lenses are often used in children's glasses because of their superior impact resistance. Lenses can be divided into daily lenses, protective lenses and multifocal lenses according to their functions.