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Monday, April 25, 2022

Newly Powered LiDAR System

Note mention of piezoelectric method for powering Lidar.    Could be a big step.

LiDAR System Promises 3D Vision for Cameras, Cars, Bots

IEEE Spectrum, Mark Harris, April 21, 2022

New Lidar System Promises 3D Vision for Cameras, Cars, and Bots Piezoelectric effect harnessed for cheaper lidar  .... 

Stanford University researchers, working with a colleague at Sweden’s Chalmers University of Technology, have developed a novel light detection and ranging (LiDAR) system that taps the piezoelectric effect to capture three-dimensional data at potentially vastly less cost than current systems. The researchers coated thin-film lithium niobate with transparent electrodes in order to excite the crystal, generating an acoustic standing wave that modulates the intensity of laser light passing through it. They were able to execute a modulated time-of-flight calculation that captured distance data to objects in the scene, using less than a watt of power. Coupling the opto-acoustic modulator with a standard four-megapixel digital camera yielded a relatively high-resolution depth map of several metal targets, locating them to within a few centimeters.

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