What types of film are there on glasses?

The eye is a very important visual organ of human beings, with a very precise and complex structure. There are various “membranes” in the human eye, and each membrane has its own unique function. The importance of “membranes” to the eyes can be seen. But not only the eyes, there are also “membranes” on glasses, and there are many types. The “membrane” of glasses is not so much a film, but a special microstructure in essence, but because the structure is continuous and the thickness is very thin (molecular level), so It is called “membrane” vividly. Different glasses “membranes” have different microscopic molecular structures, which bring different protective effects.

Anti-fog film
Anti-fog film is also called hydrophilic nano film layer, which can overcome the surface tension of water droplets and greatly reduce the chance of fog generation. When the lens with this coating layer is used together with a special lens cloth, a good and long-lasting anti-fog effect can be achieved by just wiping it.
To put it simply, the anti-fog film does not repel water droplets, but arranges the water mist molecules on the surface of the lens more closely and smoother, forming a layer of “water film” with good light transmission.

Waterproof membrane
The waterproof film is a very thin top film that can make the surface of the lens hydrophobic. Oil and water droplets are difficult to stay on the surface of the lens and fall off automatically, so it has the effect of waterproofing and antifouling. The principle is the same as the rolling of water droplets on the lotus leaf. .
The surface of the waterproof membrane is actually tiny bumps. The gaps between the bumps are too small, smaller than water molecules, so that when the water molecules fall on it, they cannot be “embedded” in the gaps. Falling down under gravity.
The essence of the waterproof film is to reduce the contact area between water and oil and the lens, so that oil and water droplets are not easy to adhere to the surface of the lens.

Dustproof “membrane”
The dust-proof function of the lens, due to the use of i-technology technology, makes the molecular structure of the lens surface denser, and dust cannot “get in”. The principle is actually similar to that of a waterproof membrane.

Anti-reflective film
Anti-reflection film is also called anti-reflection film, that is, by coating the front surface of the lens with multiple layers of transparent materials with different refractive indices and different thicknesses, the excess reflected light on the surface of the lens is reduced by using the principle of light interference.
After adding an anti-reflection film to the lens, the permeability to light will increase, the wearer will feel that the glare is reduced, and the vision will be more real and bright.

Wear-resistant film
In order to improve the wear resistance of the lens, it is necessary to use a hardening solution containing organic matrix and inorganic ultrafine particles to coat a hard film on the surface of the lens, so that the surface of the lens has both toughness and hardness. This layer of film is the wear-resistant film, which can reduce scratch damage.

Anti-ultraviolet & anti-blue light film
The medium and long-wave ultraviolet rays in sunlight are very harmful to human eyes and skin. An independent study shows that 50% of the ultraviolet light entering the human eye comes from the reflection of the rear surface of the lens. Similarly, studies have found that blue-violet light in the wavelength range of 415-455 nanometers is the most harmful to retinal cells.
In order to deal with the damage of ultraviolet and blue-violet light to human eyes, a technology called “broad-spectrum coating” came into being. The biggest advantage of this “membrane” structure is that it can intelligently filter harmful light and pass normal light.
It is precisely because of these eyeglass films with different functions that our eyes are protected accordingly. When choosing glasses, we must pay more attention to the film layers on each pair of eyes and choose the film that our eyes need in order to get the best results. better protection.

Post time: Dec-21-2022