What kinds of films are on the glasses?

2019-12-10 10:51:01 浙江日科自动化设备有限公司 Viewd 690

The eye is a very important visual organ for human beings, and its structure is very sophisticated and complex. There are various "films" in human eyes, and each kind of film has its unique role. The importance of "films" to the eyes is obvious. But not only the eyes, there are also "films" on the glasses, and there are many types. The "films" of the glasses are not so much membranes, which are actually special microstructures, but because the structure is continuous and the thickness is thin (molecular level), Only vividly called "film". Different glasses "films" have different micro-molecular structures and 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 using this kind of film, when used together with a special lens cloth, it can have a good and long-lasting anti-fog effect when rubbed.


To put it simply, the anti-fog film does not repel water droplets, but arranges the water mist molecules on the lens surface closer and smoother, forming a "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 automatically fall off. Therefore, it has the effect of waterproofing and antifouling. .


The surface of the waterproof membrane is actually a small protrusion, and the gap between the protrusions is too small, smaller than the water molecules, so that when the water molecules fall on it, they cannot be “embedded” in the gap. Gravity rolls down.


The essence of the waterproof film is to reduce the contact area of water and oil with the lens, so that oil and water droplets are not easy to adhere to the lens surface.


Dust "film"


The dust-proof function of the lens, due to the use of i-technology technology, makes the molecular structure on the surface of the lens more dense, and the dust cannot "get in." Its principle is actually similar to waterproof membrane.


Anti-reflective film


The anti-reflection film is also called anti-reflection film, that is, by coating multiple layers of transparent materials with different refractive indexes and different thicknesses on the front surface of the lens, the principle of light interference is used to reduce excess reflected light on the lens surface.


With the addition of an anti-reflection film to the lens, the permeability to light will increase, the wearer will feel less glare, and the vision will be more real and bright.


Wear-resistant film


In order to improve the abrasion resistance of the lens, a hardening liquid containing an organic matrix and inorganic ultrafine particles is required, and a hard film is plated on the surface of the lens, so that the surface of the lens has both toughness and hardness. This film is an abrasion resistant film that reduces scratch damage.


UV & Blue Light Film


The medium and long-wave ultraviolet rays in sunlight are very harmful to human eyes and skin. Independent research has shown that 50% of the ultraviolet rays that enter the human eye come from reflections on the rear surface of the lens. Similarly, research has found that blue-violet light in the wavelength range of 415-455 nm is most harmful to retinal cells.


In order to deal with the damage to human eyes caused by ultraviolet and blue-violet light, a technology called "broad-spectrum coating" came into being. The biggest advantage of this "membrane" structure is the ability to intelligently filter harmful light through normal light.


It is precisely because of these different functional film layers that our eyes are protected accordingly. When choosing glasses, we must pay more attention to the film layer on each eye and choose the film that our eyes need in order to obtain Better protection.