Lidar is a critical method by which robots and autonomous vehicles sense the world around them, but the lasers and sensors generally take up a considerable amount of space. Not so with Voyant Photonics, which has created a lidar system that you really could conceivably balance on the head of a pin.
Before getting into the science, it’s worth noting why this is important. Lidar is most often used as a way for a car to sense things at a medium distance — far away, radar can outperform it, and up close ultrasonics and other methods are more compact. But from a few feet to a couple hundred feed out, lidar is very useful.
Unfortunately even the most compact lidar solutions today are still, roughly,