Right. I'm not suggesting using that directly, or as the only mechanism. Time of flight sensors could be used, for instance: https://hackaday.io/project/47141-s

Right. I'm not suggesting using that directly, or as the only mechanism. Time of flight sensors could be used, for instance: https://hackaday.io/project/47141-sub-mm-accuracy-from-the-vl6180-tof-sensor https://hackaday.io/project/47141-sub-mm-accuracy-from-the-v...