The yellow-green flash of fireflies is one of the simplest pleasures in summer. Generations of children dream of the fireflies in the courtyard. One day it might be possible to say that you have got a lamp full of fireflies, or at least a light bulb inspired by fireflies.
The latest research has discovered and used firefly-inspired lens-shaped LED lights that require less energy to emit more light. Scientists have developed a lens for LED lights, similar to the small folds covered by fireflies' "lanterns." This lens allows 98% of the light to pass through it, which is better than traditional bulbs and this improvement is similar to coating the bulb with an expensive anti-reflective coat.
South Korean researchers inspired by firefly's belly glow pattern to develop a new type of high light transmittance LED bulb
Researchers at the Korea Advanced Technology Research Center used a scanning electron microscope to study the abdomen of fireflies. They found that the part of the lantern that glowed in the abdomen was composed of three layers and had obvious similarities with LED bulbs. A standard LED bulb is composed of a light source enclosed by a reflective cup and a lens. Similarly, a firefly lantern is composed of a reflective layer, a luminous layer, and a cuticle or carapace covered with small folds. Compared with the remaining part of the firefly's carapace, the pleated part of the firefly's abdomen transmitting light is quite neat and orderly.
The researchers found that this wrinkle helped firefly's special light wavelength to pass through the firefly's lantern more effectively, so they tried to etch a similar pattern with plastic. As expected, creating a similar pattern on an LED bulb can transmit more light. Researchers claim that this technology can be used to enhance the light of camera phones, flash lights, car headlights and even home lighting.
This inspiration is not an exact case borrowed from Mother Nature, because the artificial LED bulb is more neat and regular than the tail of a firefly. The researchers used nano-etching to pack the bulb into a honeycomb shape instead of long folds like fireflies. But like a real firefly, this mode seems to be most effective when the light wave length is 560 nanometers or yellow-green light similar to fireflies.
The researcher said that it does not necessarily mean that we will carry all the lights of the fireflies. This nanostructure can be modified to enhance different wavelengths. The light transmittance is very sensitive to the shape of the nanostructure, and this appearance can be optimized for a specific light wave length.
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