What are the lens materials of sunglasses?

Spectacle lens points
1. PC chip
2. Glass
3. Crystal
4. Polarizer

There is a lot of knowledge about lenses. There is no such thing as a polarizer, glass or resin can be used as a polarizer.

Sunglasses lens material selection knowledge:

The clarity of glass sheet is slightly higher than that of resin, but the first is heavy, and the second is easy to break (even tempered glass).

The resin sheet is very strong, but the first is much lighter, and the second is prone to scratches. Inform you to make good lens manufacturers. Buy the glass sheet from Pilkington, it is good at polarizing glass, and it is tempered glass, which is of good quality and strong. For resin sheets, buy Polaroid, a well-known manufacturer of resin polarizers, and the quality is also very good. Both of these are quite expensive, and there are no frames and lenses. From time to time, I say according to the big brands, there are too many small brands, and they are not popular.

PC chips have strong impact resistance. There are also nylon lenses, which are flexible, but they cannot be polarized, and the texture is between resin and PC lenses. The second one is like a film and can be folded.

Big brands generally do not appear. The layer is still the most expensive resin sheet, a good one is 5,6 thousand a pair. That kind of film is not at the same level as the others. Except for the expensive resin sheet, the other prices are incomparable, there are both expensive and cheap ones. These are all about the sunglasses, and the light distribution glasses are not so much. Sunglasses also have the effect of coating and plating, you can ask me about this in private, I have too much knowledge.

Talk about the crystal lens material, this kind of lens cannot be used as sunglasses. Do you know why, inform you of some industry secrets. It is said that the crystal chip is the best, absorbing heat, and the glasses are comfortable. In fact, it does not absorb a little ultraviolet rays, which is not beneficial to glasses at all, and natural crystals are also abnormally expensive! Here is another secret, in fact, the anti-ultraviolet function of sunglasses does not mainly depend on coatings, diaphragms and other things. If you don’t believe me, you can test it yourself, just take a piece of glass in front of the sun, and the UV protection ability can reach 90%. So it’s just ugly to say that UV400 sunglasses are 100% UV resistant. In fact, the biggest effect of UV protection is the lens itself.

1. Resin lens Lens material: Resin is a chemical substance with a phenolic structure. Features: light weight, high temperature resistance, strong impact resistance, and can effectively block ultraviolet rays.

2. Nylon lens Lens material: made of nylon, characteristics: very high elasticity, excellent optical quality, strong impact resistance, usually used as protective items.

3. Carbonated polyester lens (PC sheet) Lens material: tough, not easy to break, impact resistant, specially designated lens material for sports glasses, the price is higher than acrylic lens.

4. Acrylic lens (AC lens) lens material: it has excellent toughness, light weight, high perspective rate, and good anti-fog performance.

5. Polarizer and eccentric lens material:

① Polarizer: It is a polyamide film. Its function is to only accept light from one direction and block light from other directions. It uses the principle of blinds to filter stray light so that we can see things more clearly.

② Eccentric film: It is to make its convex surface into a non-parallel crossing surface, in order to make the refractive index of light within the acceptance range of our eyes, so that our vision is clear without dizziness, and it is fashionable to achieve glasses While maintaining our eyes.