fbpx
Sunday, March 7, 2021

Indian-origin scientist develops first self-powered camera

Reading Time: 2 minutesComputer scientist Shree K. Nayar from Columbia University has invented the world’s first fully self-powered video camera that can produce an image each second, indefinitely, of a well-lit indoor scene.

Nayar designed a pixel that not only can measure incident light (a ray of light that strikes a surface) but also convert the incident light into electric power.
“We are in the middle of a digital imaging revolution. A camera that can function as an untethered device forever — without any external power supply — would be incredibly useful,” said Nayar, who heads the computer vision laboratory at the Columbia Engineering.
At the heart of any digital camera is an image sensor, a chip with millions of pixels.
The key enabling device in a pixel is the photodiode which produces an electric current when exposed to light.
The photodiode in a camera pixel is used in the photoconductive mode while in a solar cell it is used in the photovoltaic model.

This mechanism enables each pixel to measure the intensity of light falling on it.
Nayar, working with research engineer Daniel Sims, and consultant Mikhail Fridberg of the consultancy firm ADSP Consulting used off-the-shelf components to fabricate an image sensor with 30×40 pixels.
In Nayar’s prototype camera, which is housed in a 3D printed body, each pixel’s photodiode is always operated in the photovoltaic mode.
When the camera is not used to capture images, it can be used to generate power for other devices, such as a phone or a watch.
According to Nayar, the image sensor could use a rechargeable battery and charge it via its harvesting capability.
“But we took an extreme approach to demonstrate that the sensor is indeed truly self-powered and used just a capacitor to store the harvested energy,” he noted.
“We believe our results are a significant step forward in developing an entirely new generation of cameras that can function for a very long duration — ideally, forever — without being externally powered,” the authors wrote.
The team is set to present its work at the international conference on computational photography at the Rice University in Houston April 24-26.

- Advertisement -

Related Articles

LEAVE A REPLY

Please enter your comment!
Please enter your name here

Podcasts

Ep 9: What do young Indians want from love?

0
Growing up in Indian culture, most of us know that love has never been as popular as marriage. Even in the movies, the main...

Ep 8: Indian links in Indigenous Australian poet Ali Cobby Eckermann’s...

0
To celebrate NAIDOC week 2020 (between 8-15 November) I spoke to Yakunytjatjara poet Ali Cobby Eckermann about her time in India where she taught...

Ep 7: In the case of Sushant Singh Rajput

0
  The torrid and high-octane Sushant Singh Rajput case has been fodder for Indian people and press for the last few months. The actor’s tragic...

Latest News

Guess The Song rj ekta

LISTEN: Will you be the one to correctly guess this tune?

0
  Are you good with guessing tunes? Keen ear for rhythm and beats? RJ Ekta might've been able to stump you with this one. She recently...
Dr Michelle Ananda-Rajah twitter thread

Women, what would you tell your school age self?

0
  Ahead of International Women's Day on 8 March, Monash University's Dr Michelle Ananda-Rajah was asked to speak at a girl's school. The inspiring academic,...
women empowerment

WATCH: Hindi poem about women empowerment

0
  Ever have those days where nothing is going your way? You feel demotivated and wonder, "what's the point?". The last couple of weeks in Australia...
march 2021 shows and movies

Indian shows and movies to watch in March 2021

0
  Bombay Begums (Netflix) After the award-winning Lipstick Under My Burkha (2016), director Alankrita Shrivastava is back with another empowering series about women. Set in urban...

Japanese billionaire seeks eight artists for free Moon ride

0
  Japanese billionaire Yusaku Maezawa has invited eight people to join him for a free ride to the Moon on a SpaceX Starship rocket sometime...