Contact lenses with night vision could be on the way thanks to graphene breakthrough
Lenses made from the atom-thick 'wonder material' could be used in phones or even contact lenses to make night vision available for all
Friday 21 March 2014
Night vision technology has been around for a while, but it's only really used by professionals (or professional creeps) due to its prohibitive size.
But what if night vision was something you could fit into a pair of contact lenses? You could keep a pair in your bag to slip in if you were going to be walking home alone in the dark, or even use them to take a night-time jaunt through a forest without spooking all the animals.
All this and more could be possible in the future thanks to a new development by researchers in the US using graphene lenses to sense “the full infrared spectrum” plus visible and ultraviolet light.
"We can make the entire design super-thin," said Zhaohui Zhong, assistant professor of electrical and computer engineering at the University of Michigan. "It can be stacked on a contact lens or integrated with a cell phone."
Current night vision technology needs bulky cooling equipment to stop the detectors getting confused by their own heat radiation, but the graphene-based models can do the same job using just a few layers of the atom-thick material.
The most effective night vision technology works by capturing the infrared portion of the light spectrum – this is the part that is emitted as heat by objects, instead of reflected as light.
Even the smallest and most modern night vision tech is pretty bulky.
Zhong suggests that the infrared-capturing graphene lenses could therefore be used for more than just night vision. The technology could help doctors monitor blood flow without having to move a patient or subject them to any scans, or be used by art historians to examine layers of paint underneath the surface. It’s not quite X-ray vision but it’s pretty damn close.
Previous attempts to use graphene in this way have suffered from the material’s insensitivity towards parts of the light spectrum. The team from Michigan’s breakthrough was to create a sandwich of layers, with an insulating barrier placed between two slices of graphene and an electrical current sent through the bottom part.
When the infrared light hits the top layer of graphene it dislodges electrons as normal (this is, in effect, the signal that gets ‘seen’ by the eye) a process that is then amplified by the electrical current. And hey presto (or some other, more scientific, phrase) you get night vision.
“Our work pioneered a new way to detect light,” said Zhong. “We envision that people will be able to adopt this same mechanism in other material and device platforms.”
Contact lenses seem to be a consistent draw for technologists looking to augment human ability – most likely due to their inconspicuous nature – and previous efforts in this area have included Google’s prototype that monitors blood sugar, and a contact lens that has optical zoom.
Life & Style blogs
Half of young women unable to ‘locate vagina’ and 65% find it difficult to say the word
Is Apple's iCloud safe after leak of Jennifer Lawrence and other celebrities' nude photos?
David Sedaris: What I learnt from Fitbit about the world around me
Anal sex study reveals climate of 'coercion'
FBI investigates 4Chan for posting hacked nude celebrity photos
Rotherham child sex abuse scandal: Labour Home Office to be probed over what Tony Blair's government knew - and when
What do immigrants really think of Britain? Polish immigrant's Reddit post goes viral
Ashya King: Parents of five-year-old boy refused permission to visit him in hospital and denied bail at Spanish court
With Douglas Carswell joining Ukip, my party has taken another giant step forward
When elitism grips the top of British society to this extent, there is only one answer: abolish private schools
Ashya King: 'Cruel NHS has not given us the treatment we need', says father of five-year-old with brain tumour who fled to Spain
- 1 David Sedaris: What I learnt from Fitbit about the world around me
- 2 Saudis risk new Muslim division with proposal to move Mohamed’s tomb
- 3 A teacher speaks out: 'I'm effectively being forced out of a career that I wanted to love'
- 4 Cee Lo Green: 'It's only rape if the victim is conscious'
- 5 Katie Hopkins in tears over weight gain challenge: ‘I hate fat people for making me do this’
iJobs Gadgets & Tech
£65000 - £75000 per annum + Benefits + Bonus: Harrington Starr: C# Client-Side...
£40000 - £45000 per annum + Benefits + Bonus: Harrington Starr: Front-Office D...
£40000 - £50000 per annum + Benefits, Training & Bonus: Harrington Starr: C# S...
£35000 - £36500 per annum: Ashdown Group: Systems Administrator (SharePoint) -...