Researchers inspired by marine life to design camouflage systems (w/ Video)

Aug 19, 2014
Adaptive camouflage in operation.

It could be a fun party trick – put your cell phone down on a table and watch it fade into the woodwork – or part of a lifesaving technology used by industry or the military.

Researchers have developed a that allows a material to automatically read its environment and adapt to mimic its surroundings. The technology is described in a paper published this week in the Proceedings of the National Academy of Sciences.

Cunjiang Yu, assistant professor of at the University of Houston and lead author of the paper, said the optoelectronic camouflage system was inspired by the skins of cephalopods, a class of marine animals including octopuses, squid and cuttlefish, which can change coloration quickly, both for camouflage and as a form of warning.

Other researchers on the project include John A. Rogers of the University of Illinois at Urbana-Champaign and Yonggang Huang of Northwestern University.

Earlier camouflage systems didn't automatically adapt, Yu said. "Our device sees color and matches it. It reads the environment using thermochromatic material."

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A camouflage system matches a continuously changing background.

The prototype developed by the researchers works in black and white, with shades of gray, but Yu said it could be designed to work in the full color spectrum. Similarly, he said while the prototype is less than one-inch square, it can be easily scaled up for manufacturing.

The flexible skin of the device is comprised of , combining semiconductor actuators, switching components and light sensors with inorganic reflectors and organic color-changing materials in such a way to allow autonomous matching to background coloration.

The researchers describe their work as including pixelated devices that include analogs to each of the key elements included in the skin of cephalopods, with two exceptions, the iridophores and central ocular organs.

Adaptive camouflage in a flexible, bent configuration.

While the most valuable applications would be for defense or industry, Yu said consumer applications such as toys and wearable electronics also could offer a market for such a technology.

Another possibility? Luxury carmakers now try to give a car's occupants the sensation that the car has disappeared by deploying cameras to shoot videos on the passenger side of the car and using LED mats to display the view. Yu said this technology could be incorporated for a similar purpose.

Explore further: Cuttlefish may offer model for bioinspired human camouflage and color-changing products

More information: Adaptive optoelectronic camouflage systems with designs inspired by cephalopod skins, Cunjiang Yu, PNAS, DOI: 10.1073/pnas.1410494111

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bradi
1 / 5 (1) Aug 19, 2014

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antialias_physorg
5 / 5 (2) Aug 19, 2014
put your cell phone down on a table and watch it fade into the woodwork

I dunno...I keep misplacing my cell phone enough as is. I don't need it to actively hide from me.

The military implications are obvious (also for birdwatchers and the like). Might also be used on a grander scale to let ugly constructions fade into the background (powerplants, highrises, etc. )
But I certainly wouldn't want this to become the fashion amongst pedestrians. They're hard enough to spot at night already.
jalmy
3 / 5 (2) Aug 19, 2014
One of the cooler things I have seen this week. I can't wait until everything in our daily lives has the ability to change color. Mood rings? How about mood cars, houses, phones, clothes, boats. Not to mention actual active camo would be cool for hunters and soldiers alike.
Toiea
not rated yet Aug 19, 2014
I don't understand the meaning of this. If you switch the camera on iPad you'll get the same result - the display surface of iPad will match its background. How the thermochromic pigment would work at different temperatures? Wouldn't be the usage of LCD/OLED flexible display much more effective? Why to reinvent wheel?

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