A team of researchers has been working on anti-reflective glasses which are used on devices like mobile phones, computer and tablet screens etc.
Quite interestingly they got their inspiration from the applications of physics they discovered in the moth’s eye and the lotus flower. The team working on this consists of scientists from the National Taiwan University, and the University of Central Florida.
Overcoming the hurdles
The ambient light, which gets reflected the eyes while looking on a lighted screen, is the source of the problem. Hence, the job of the anti-reflective screens is to absorb the ambient light. Also, it keeps the glare under control by letting no light reflected your eyes.
That is what the makers of the iPad did while manufacturing the iPad Mini 4. And they claimed that the anti-reflective screen of the device only let back 2% of the light.
Things have moved up a step, and the improvement is big with the moth-eye inspired anti-reflective screens. These new screens are far better by reflecting on 0.23% of the ambient light. It has reduced glare to a minimum and made it super easy to read the screens in daylight, under the sky. To understand the miracle behind the progress, you will have to understand how the moth’s eyes are different.
The Moth’s eyes and the Lotus petals
The moth’s eyes are different in structure. The moth’s eye is a screen with a mesh design where the color is absolute dark to absorb rays of light, and not reflecting. To make it more effective, their eyes have a special structural power. They have micro pockets all over the eye surface. These pockmarks accept rays of light and change the gradient of light in such angle that the light gets absorbed, trapped, and deflected.
The same model is followed in case of making an anti-reflective anti-glare screen. For this templates of silicon dioxide are used. The gap between the pockmarks is 10 nanometers and the nanoparticles used are of 100 nanometers. When such a sheet made of nanoparticles is attached to the screen, the screen gains the anti-reflective properties.
The lotus petals also have a big role in enhancing the functionality of the design. The lotus petals are hydrophobic and do not let water stay on them due to a coating of wax. Hence no dirt also clings to the petals, and they stay clean and fresh. The same technology is applied to the anti-reflective screens too. They are given another coating of a hydrophobic sheet to keep the free from grease and dirt.
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