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      What is the difference between blue film and green film in optical lenses

      2020-10-16

      Blue film: As the name suggests, it uses optical film and new vacuum technology to coat a layer of material on the surface of the lens to improve the ability of the lens to reflect light, so that the film or reflection of the lens is blue.

      Green film: Make the film layer or reflective color of the lens green.

       

      Difference 1: different light transmittance

      In terms of light transmittance, blue film lenses are relatively weak, and green film lenses have higher light transmittance among all coated lenses. The light transmittance of the green film lens can reach 98.6%, while the blue film lens only reaches 96.8%. Green film has a more advanced and complex film system than other coating layers, so the anti-reflection will be wider and flatter, and the anti-reflection point will be in the center of the visible spectrum.

       

      Difference 2: Different security

      Compared with green film lenses, blue film lenses cannot filter harmful glare. The anti-ultraviolet performance is relatively low, unlike the green film lens, it can prevent 100% ultraviolet, infrared and various harmful glare from damaging the eyes, and the damage to the eyes is relatively small. Therefore, in terms of safety performance, green film lenses are superior to blue film lenses. They can not only prevent eye diseases such as maculopathy and cataracts, but also prevent visual impairment and vision loss.

       

      Difference 3: different wear resistance

      The wear resistance of the blue film lens is much higher than that of the green film lens. At the same time, the blue film lens also has the function of preventing electromagnetic wave radiation from computers, TVs, mobile phones, etc., and is more comprehensive in protecting the eyes.

       

      Difference 4: Different comfort

      Green film lens, its biggest advantage is not only higher safety, but also better wearing comfort. This is because the green color is closer to nature, and the green film layer is more in line with the physiological characteristics of the human eye; The green light has the effect of massaging the eyeballs, and it will not feel uncomfortable when worn for a long time. It can relax eye fatigue and achieve the effect of eye care. The green light has the effect of massaging the eyeballs, and it will not feel uncomfortable when worn for a long time. It can relax eye fatigue and achieve the effect of eye care.

       

      The optical lens can show different colors at different angles because it is coated with a single layer (magnesium fluoride) or multiple layers (silicon dioxide, aluminum oxide, zirconium dioxide, magnesium fluoride) anti-reflection coating. The purpose of coating is to prevent strong light reflection.


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