With smartphones and computers constantly in hand and outdoor ultraviolet (UV) rays growing stronger, our eyes are facing unprecedented challenges. According to the World Health Organization, over 2 billion people worldwide suffer from vision problems, and UV radiation and glare are the “invisible killers” damaging eye health. Traditional optical lenses struggle to cope with these issues, but Xiamen Hongtai Optical Co., Ltd. has filed a patent for a new solution: “A wideband antireflection coating and lens for mid-to-near ultraviolet to visible light” (Patent No. CN119937067A).
UV rays are everywhere in daily life. Mid-to-near UV rays can penetrate the cornea and lens, and prolonged exposure can lead to corneal inflammation, cataracts, and even increase the risk of macular degeneration. Additionally, glare caused by visible light reflection not only disrupts vision but also increases eye fatigue. Studies show that under strong outdoor light, glare can reduce visual clarity by 30%, and computer glare in office environments should not be ignored either.
The core of Xiamen Hongtai’s patent is the unique multi-layer coating structure on the concave surface of the lens. From the structure on the concave surface of the lens. From the inside out, five layers of materials work in synergy, with the second layer—a mixed material of zirconium-titanium with a specific refractive index—being the most crucial. Using the principle of optical interference, this layer ensures that mid-to-near UV and visible light reflect off the coating in such a way that they cancel each other out, significantly reducing reflectance. Unlike traditional coatings that only cover a narrow or single wavelength range, Hongtai’s coating achieves full-spectrum protection, offering significant advantages.
In practical use, this lens performs exceptionally well. In outdoor settings, whether under the strong sunlight of the beach or the high-altitude UV rays, it can reduce the UV reflectance to a very low level, effectively minimizing harm. Indoors, facing computer screens or complex lighting conditions, the lens reduces visible light reflection, eliminating glare and making vision clearer. Tests show that after using this lens, eye fatigue from long hours of office work can be reduced by about 40%.
This patented technology has far-reaching implications for the optical industry. For consumers, it provides a higher-quality eye protection option; for optical equipment manufacturers, it promises to improve the imaging quality of products like camera lenses and telescopes. In the future, this technology could be applied to car windshields and building glass, reducing glare and blocking UV rays, making driving safer and living and working environments more comfortable.
Xiamen Hongtai’s breakthrough brings new possibilities to the field of optical protection. Visit our website for more updates on cutting-edge optical technology and quality product recommendations, and join us in exploring a clear and healthy visual world!
