1, glass lens
Glass lenses are often touched by us. The most outstanding advantage of glass lenses is that their optical properties are very stable. This is the consistent advantage of glass lenses. It is also the same on frame glasses, and the glass lenses are not easily deformed. Under the pressure of the framework. The disadvantage of glass lenses is that they are easily broken and breakage can cause damage to the eyes. The newly developed reinforced glass lens is more prominent than ordinary glass lenses and is also considered a safety lens.
2, polarized lenses
This is a lens used on polarized sunglasses. Using the principle of polarization of light, the glare from all sides is blocked outside the lens, which makes the line of sight clearer and safer when driving. In 1937, Dr. Edwinland invented the lens in the United States, and then was widely used in polarized sunglasses. He also used his potential to create his own Polaroid company.
3, color lens
Also called photosensitive lens, because of the change of light, the color of the lens changes accordingly, so that the eye can adapt to different environments. Under strong light, the color of the color changing lens will deepen. Under the light, the color of the lens will automatically become lighter. . This type of lens has been used in myopia sunglasses. This type of lens in the form of a color lens is also considered to be the most convenient and aesthetically pleasing myopia sunglasses, which is more popular than the clip type.
4, plastic lenses
This is a material that many sunglasses brands like very much. It is the most obvious feature of lightweight and non-breakable. The anti-ultraviolet function of plastic lenses without any treatment is obviously better than that of glass lenses, and the plastic lens is more simple in color processing. . The disadvantage of the plastic lens is its wear resistance, which is easier to scratch, and the lens is easily deformed when it is hit, so it is more careful to maintain it.
There are three main types of plastic lens materials, namely, resin lenses, PC lenses, and acrylic lenses.
5, resin sunglasses lens
Friends who often wear glasses must have heard of resin lenses, but what exactly is a resin lens? Resin (CR-39) is actually a phenolic structure chemical compound, which is refined from phenolic components in petroleum. Its characteristics are light weight, high temperature resistance and strong impact resistance, which can effectively block UV and other functions. The great advantage of resin lenses used in sunglasses is the ease of coloring. Many fashionable sunglasses utilize the characteristics of resin-type lenses for coloring. However, the resin lens has poor toughness and is not resistant to impact. These types of sunglasses are widely used and have a strong decorative effect, making them a good choice for fashion people.
6, PC material sunglasses lens
PC refers to polycarbonate, which is a kind of plastic (referred to as PC). It is a polymer with a carbonate group in the molecular chain. PC lens, which is simply a plastic lens, also has this material. At the high and low end, there are PC chips commonly used by professional athletes and a set of colored or colorless plastic sheets. It is characterized by lightness and good coloring properties. The disadvantages are low abrasion resistance and unstable optical properties. PC-made sunglasses are more suitable for use with sports people and drivers.
7, AC film (acrylic lens)
It has excellent toughness, high penetration rate, good anti-fog property, lowest cost, brittle material, cracking and chipping, and stable optical index.
8, nylon sunglasses lens
Nylon sunglasses are used in sports brand sunglasses and high-quality big-name sunglasses. They have high elasticity and excellent optical quality, and have excellent impact resistance. When nylon lenses were invented, they were applied as eye protection mirrors. Professional protection features. However, nylon lenses have poor wear resistance and high production costs. These types of sunglasses are more suitable for people with sports or professional protective glasses.
9, TAC material sunglasses lens
TAC sunglasses lenses are widely used in China, TAC (Triacetyl Cellulose), which is very complex and is one of the high-viscosity polymer materials. As a sunglass lens, TAC has the characteristics of acid and alkali resistance, light weight and high cost performance.