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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)
New sensor releases a thousand times faster laser lidar system
[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.