device enables standard cameras to produce hyperspectral images | Technological impulse | Dec 2017

A miniaturized hyperspectral device was developed as an add-on to a standard camera and could be used to reuse a camera to generate hyperspectral images and video for a range of applications. The device uses compressional sampling techniques to capture signals and images from far fewer samples or measurements than the traditional sampling theorem that has been around for decades.

The device, developed by four BGU researchers, can reuse a standard camera for a plethora of applications, including micro-detection of cancer cells or measurement of contaminants in water, with near 100% accuracy. Courtesy of Ben Gurion U.

Only a few tens of microns wide, the device is easy to produce using commonly available materials such as liquid crystals. It was developed by a research team from Ben-Gurion University of the Negev (BGU).

“Instead of using a large, heavy prism inside the camera, we’ve developed a very small, tunable filter and sensor that is activated by electrical current,” Professor Dan Blumberg said. “Every time the current changes, a photo is taken.”

According to the researchers, the device offers near 100% accuracy when used for micro-sensing or measurement.

Professor Adrian Stern said: “The technology uses our ‘compressive sampling’ based software, which minimizes redundant data collection during image capture, making the camera at least 10 times faster and creating images spectrum of a much higher quality.

This innovation could help reduce the cost of hyperspectral imaging (HSI), making it more accessible for a variety of applications, including professional photography. It could also help expand the use of HSI technology in the electronic test and measurement instrument market.

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