The reflection of the lens can reduce the light transmittance and form interference images on the retina, which affects the quality of the image and affects the appearance of the wearer. Coated lens is a new technology of optical film and vacuum, coated with single or multi-layer optical film, so that the lens can obtain some new, excellent performance that did not have originally to improve the ability of the lens to reflect light and enhance the performance of the lens. Or reduce the effect of light transmission.
1.Hard Coating (umbrella for resin lenses): resin lenses are widely used at present, because the abrasion resistance of resin lenses is worse than that of glass lenses, the hardening of resin lenses can ensure good friction resistance.
2.Anti-reflection Coating (the first choice for clear vision): no matter the resin or glass lens, the light transmittance cannot reach 100%, some light will be reflected back by the two surfaces of the lens, and the higher the refractive index, the higher the reflectivity of the lens .
From the data, the light transmittance of glass lens without coating is 91%, while CR39 is 92%, while high-refractive resin lens is only 87%, which is basically between the state of colored and colorless. The light transmittance of the coated lens can reach more than 95%, and even some lenses can reach an ultra-high light transmittance of 99.6%, which is the function of the anti-reflection coating.
3.Super Hydrophobic Coating (favorite for cleanliness): In daily wear, the lens will be stained with water stains, oil stains, dust and other stains. Super hydrophobic coating can make the lens have excellent hydrophobic performance. When water droplets fall on the lens, they will be distributed in the form of water droplets. It is difficult for water droplets to stay on the smooth surface of the lens and fall off automatically. The principle is the same as that of water droplets rolling on the lotus leaf. This can reduce the adhesion of dust and water, not easy to get dirty, and easy to clean.
4.Bluebocker Coating Some research suggests that long-term exposure to blue light below 445nm may cause retinal damage. The anti-blue light film can effectively intercept blue light below 445nm, retain beneficial blue light, and improve visual clarity when using digital devices.
Post time: Apr-20-2023