Advantages and Disadvantages of Sunglasses Lens in Different Material
In the hot summer, whether going for a self-driving outing, going on a beach holiday, hiking in the wild, or going out shopping, fashionable hipsters must have a fashionable sunglasses. However, in the face of sunglasses with a single variety, functionality, style and brand, In particular, how to choose the material of sunglasses lenses, such as glass sunglasses lenses, resin sunglasses lenses, nylon sunglasses lenses,etc.?
Today, I will share with you the classification, advantages and disadvantages of sunglasses lens materials, so that you can choose the most suitable sunglasses according to your needs.
一、Glasses Lens
Friends who often wear hyperopic optical lenses and those who often wear sunglasses must have encountered slight scratches on the lenses after wearing glasses for a period of time, and want to change to another pair of glasses; then, sunglasses with glass lenses will This effect is rarely encountered. The reason is: the glass sheet is the most scratch resistant. Even ordinary glass has a hardness of about 6 and the hardness of the blade is 5.5. Assuming that the lens is hardened glass or crystal, then without encountering diamonds and granites, There will be no traces of scratches.
In addition, the glass lens is the first choice for the lens with the best optical function. The history of using glass as lens can be traced back to hundreds of years, but fewer and fewer glasses or sunglasses insist on using glass. The reason lies in the cost of glass lens manufacturing. The price of preferred glass lens materials is very high. In addition, in the process of cutting and grinding glass lenses, the lathe is worn out and the raw materials of glass sheets are invalid, which is much more expensive than other materials.
Advantages: extremely high optical function, high surface hardness, strong scratch resistance
Defects: heavy weight, nose pressure, fragile
Price: very high
二、Resin Lens
Friends who often wear glasses must have heard of resin lenses. So what are resin lenses? Resin (CR-39) is actually a chemical substance with a phenolic structure, which is refined from the phenolic components in petroleum. It is characterized by light weight, high temperature resistance, strong impact resistance, and can effectively block ultraviolet rays and other functions;
Resin-based materials are not only used for optical lens materials for correcting vision. At present, they are more courageous in sunglasses with corrective functions. The biggest advantage of resin lenses on sunglasses is that they are easy to color. Many fashionable sunglasses use resin-based lenses to facilitate Coloring characteristics. The resin lens will be deformed under intense sunlight for a long time and is not resistant to impact (impact under strenuous exercise).
Advantages: light, good optical function, easy to color
Defects: poor toughness, intolerant of impact
Price: a wide range, normal to medium
三、Nylon Lens
Sunglass lenses made of nylon. Consumers have rarely heard of this material. In fact, many sports brands and simple big-name sunglasses use nylon lens materials; characteristics: high elasticity, excellent optical quality , The anti-impact function is very strong, the time when nylon lens was invented was used as eye protection glasses; in addition to professional protection, it was quickly implemented in many special industries, such as military and police, and shooting range anti-goggles.
Although the characteristics of nylon itself are not very suitable for mutation coloring and adhesion of polarizing film, but now that the technology is highly prosperous, it is only necessary to spare no expense, and there is no unfulfillable obligation. Customizing a set of top mutation polarized nylon film, the cost is about enough to buy a few ordinary sunglasses.
Advantages: high toughness, shaky optical function
Defects: The wear resistance is worse than glass, and the consumption cost is high.
Price: high
