28 May '15, 12pm

Lidar-on-a-Chip: Scan Quickly, Scan Cheap

Lidar-on-a-Chip: Scan Quickly, Scan Cheap

You can hide radar behind the grill of your car or under a plastic body panel, but the laser equivalent, lidar, typically sticks out as a box above the bumper or as a tower on the top. That’s because the laser beam must be steered mechanically. Besides being big and ugly, today’s lidar is expensive , and for that reason rare on the roads. Only the experimental cars carry it. But that will change, according to DARPA. The defense research agency has just demonstrated a LIDAR-on-a-chip system that steers its electronic beam much as today’s radars do—using arrays of many small emitters that each put out a signal at a slightly different phase. The new phased array thus forms a synthetic beam that it can sweep from one extreme to another and back again 100,000 times a second. That beats today’s fastest laser roof ornaments by a factor of 10,000. Like all things military, the dev...

Full article: http://spectrum.ieee.org/cars-that-think/transportation/s...

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Cheap Lidar for Automatic Braking

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