At Columbia a researcher Shree K. Nayar and T.C. Chang, Professor of Computer Science with his team has introduced a video camera that powers itself.In the prototype video camera reseacher designed a pixel that is able to measure incident light and convert incident light into electric power.
The camera is expected to make its way to wearable devices, sensor networks, smartphones and the internet of things.In the camera, the major component is the photodiode which produces an electric current when exposed to light.They utilized image sensor, a chip that houses the pixels of millions.They used photoconductive mode to measure the intensity of light falling on a pixel.
Nayar and his team utilized off-the-shelf components to fabricate a 30x40 pixels image sensor.It has two transistors.The camera first record and read the image and then to collect light to charge the sensor's power supply.When the camera is not in use, it can be utilized to produce power for other devices like a watch or a smartphone.Nayar said, the image sensor ables to use a rechargeable battery and charge it through harvesting capability.They used capacitor to store power energy.
Nayar explained, "even though we've used off-the-shelf components to demonstrate our design, our sensor architecture easily lends itself to a compact solid-state imaging chip. 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 group of researcher is going to display its prototype self-powered camera at the the International Conference on Computational Photography at Rice University in Houston.
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