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Camera Uses Sensor with Only 1,000 Pixels to Capture Mega-Pixel Videos

Sensors in cell phones and single-lens reflex cameras (SLRs) are made of silicon, which is sensitive to the visible wavebands of light and therefore useful for consumer photography. In many wavebands that are outside silicon's sensitivity, sensing can be very expensive. Two examples are in short-wave infrared and mid-wave infrared - the cost of a megapixel sensor in both wavebands is typically in the tens of thousands of dollars. Consequently, high-resolution short-wave and mid-wave infrared sensors are too expensive to be affordable for the average consumer. Researchers from Carnegie Mellon University and Columbia University have developed a new camera, called LiSens, that uses a sensor with just a thousand pixels, but produces images and videos at nearly a mega-pixel resolution. LiSens takes a low-resolution sensor and by the use of a novel optic makes it capable of sensing scenes at a resolution that is higher than that of the sensor. This is achieved by focusing the scene onto a digital micromirror array (DMD) and, subsequently, focusing the DMD onto the low-resolution sensor. The DMD is an array of tiny mirrors that can direct light towards or away from the sensor.

Topics:
Cameras Electronics & Computers Imaging Optics Photonics Sensors Video

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    Transcript

    00:00:03 this video of a bunny is special it was captured by a camera with just 1,000 pixels and more incredibly the pixels were arranged in a line so how is it possible for a line sensor with just 1,000 pixels to capture this megapixel video to achieve this we use some novel Optics and a device called the digital microm mirror device the DMD and the Optics allow each

    00:00:27 pixel on the line sensor to be focused on a line on the scene different pixels are focused on different lines the DMD also allows us to block light from portions of these lines our Hardware prototype is capable of obtaining 1,000 lines per second which are then combined to form an image or a video of the scene for more details please visit our lb

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