Scientists develop anti-fog windows

A new anti-fog remedy developed by Canadian researchers could prove to be a boon for motorists, photographers and people who wear specs.

Scientists at Université Laval have created the first ever anti-fog coating, which would be helpful eliminating the fog on eyeglasses, windshields, goggles, camera lenses, and on any transparent glass or plastic surface.

Lead researcher Gaétan Laroche said: "Despite appearances, the fog that forms on glasses is not a continuous film. In fact, it consists of tiny droplets of water that coalesce on the surface and reduce light transmission.

"A good anti-fog coating should prevent the formation of such droplets."

Motorists could use the coating on windscreens to aid clear view during driving.

Researchers used a hydrophilic compound, polyvinyl alcohol, to develop the coating, which allows water to spread uniformly on the glass surface - the result is a thin, transparent, multilayered layer of water that does not change the optical properties of the surface.

The latest invention could find use in a wide number of applications, including vehicle windshields, protective visors, camera lenses, binoculars, optical instruments used in chemistry and medicine, and corrective lenses.

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