0

Contact lenses with built-in video could be 3D printed, detect fatigue in pilots

Nl 2014 0332920007

Newscientist has the story on this developing technology that could work to, among other things, help detect fatigue in pilots by monitoring chemical biomarkers present in the wearer.

Most of today’s 3D printers work with scraps of plastic or metal and turn them into simple objects. But Michael McAlpine at Princeton University and his colleagues have developed a 3D printer that can make a five-layered contact lens, one which emits light into the wearer’s eyes.

The lens is a transparent polymer with several components embedded inside: nanoscale quantum dot light-emitting diodes, wiring made from silver nanoparticles, and organic polymers that could act as parts of electrical circuits.

The trickiest part, McAlpine says, was working out which chemical solvents would deposit each layer best, leaving them dry enough for the next layer to adhere.

Another challenge was the fact that everyone has uniquely shaped eyeballs. The team scanned the contact lens constantly with two cameras to ensure the final shape matched the user’s prescription.

The work was funded by the US Air Force, which hopes to use such lenses to display in-flight data. Replacing the LEDs with light sensors could also reveal the state of the wearer’s retina and possibly monitor pilot health without invasive implants.

They could also be replaced with sensors that detect chemical biomarkers of fatigue in eye fluids, McAlpine suggests. “Planes have sensors for the state of everything, except the most important thing: the pilot’s exhaustion level,” he says.

Read more.


Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, or even use Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for MakeCode, CircuitPython, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.

Join 12,000+ makers on Adafruit’s Discord channels and be part of the community! http://adafru.it/discord

CircuitPython 2019!

Have an amazing project to share? The Electronics Show and Tell with Google Hangouts On-Air is every Wednesday at 7:30pm ET! To join, head over to YouTube and check out the show’s live chat – we’ll post the link there.

Join us every Wednesday night at 8pm ET for Ask an Engineer!

Follow Adafruit on Instagram for top secret new products, behinds the scenes and more https://www.instagram.com/adafruit/


Maker Business — Trade war rolls on, effects will have lasting implications

Wearables — When you need support

Electronics — LED colors: what they tell you

Biohacking — The Prebiotic Advantage

Python for Microcontrollers — CircuitPython Day Celebrations! #Python #Adafruit #CircuitPython #PythonHardware @circuitpython @micropython @ThePSF @Adafruit

Get the only spam-free daily newsletter about wearables, running a "maker business", electronic tips and more! Subscribe at AdafruitDaily.com !



No Comments

No comments yet.

Sorry, the comment form is closed at this time.