How to classify optical lenses

Lenses can be divided into spectacle lenses, resin lenses, PC lenses, etc. according to different materials.

Glass lenses

  The main raw material of glass lenses is optical glass, which has superior 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, usually the highest index for lens applications is 1.9. Finally, the surface of the glass lens is harder and more scratch-resistant, but due to material issues, the weight of the glass lens is heavier, which affects the wearing comfort to a certain extent. In addition, the glass lens itself is fragile, especially with the improvement of resin lens technology and craftsmanship, the use of glass lenses has become less and less in recent years.

Resin lenses

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

Resin has two kinds of natural resin and synthetic resin. The resin lens is a lens made of resin as a raw material, compounded, processed, and polished. The advantages of resin lenses are obvious, light weight and more comfortable to wear. Secondly, resin lenses have excellent impact resistance, are less fragile and safer. And the resin lens has good light transmittance, and because the resin lens is easy to reprocess, it can meet 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 its chemical name is polycarbonate. Tough and unbreakable to prevent lens breakage during strenuous activities. At the same time, PC lenses are light in weight, only 2g per cubic centimeter, and have characteristics far exceeding UV. PC lenses are usually used in children's glasses because of its superior impact resistance. Lenses can be divided into daily use lenses, protective lenses and multi-focal lenses according to their functions