During the Covid-19 pandemic, eyeglass wearers have faced another problem: lenses fog up due to wearing a face mask🇧🇷 The difficulty of seeing, even without protection, also occurs in cold days.
Scientists at the Federal Institute of Technology Zurich (ETH Zurich) in Switzerland have announced a solution to the problem. They developed a a sort of transparent golden film that uses sunlight to heat the lenses of the glasses, preventing them from fogging up in humid conditions.
Glasses fog up when moisture in the air or someone’s breath hits the cold lenses which then condense into tiny droplets. With masks not closing tightly around the wearer’s nose, warm, humid air is directed upward as people exhale.
ETH Zurich has also applied for a patent for the coating could be applied on automobile windshieldswithdrawing the traditional anti-fog.
The special feature of the new coating is that it selectively absorbs solar radiation. Half of the energy contained in sunlight resides in the infrared spectrum, the other half in the spectrum of visible light and UV radiation.
“Our coating absorbs a large part of the infrared radiation, which causes it to heat up to 8 degrees Celsius”explained Iwan Hächler, a scientist involved in the project, according to “Metro.
