[China Instrument Network Instrument Development] MIT and DARPA researchers have created an on-chip lidar sensor that is so small that it can place multiple lidar sensors on the surface of a 10-cent coin. It uses lasers and radar-like technology to detect distances. Lasers can bring higher resolution for lidar sensors because the wavelength of light is about 100,000 times smaller than the wavelength of radios.


At present, self-driving cars and robots often use laser radars, including lasers, independent free-space optical components, and large external receivers. The laser receiver module is mechanically rotated and oscillated up and down, and a complete field view is obtained. Current laser radar systems cost from $1,000 to $70,000.

New radar sensors developed by MIT and DARPA are made from 300mm wafers. This means that on a multi-million-year-a-year basis, the production cost of a single-chip lidar sensor is about $10. Because there are no moving parts, the sensor speed is 1,000 times faster than current mechanical lidar systems, making it ideal for tracking in only a short time. Small objects.

This tiny sensor size is 0.5mm x 6mm and has steerable send and receive phased arrays and on-chip germanium photodetectors. This sensor does not have an integrated laser function, but researchers say that other teams have demonstrated that lasers can be integrated on future chips.

(Original title: MIT developed a tiny single-chip radar sensor)

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