Palo Alto-based Luminar has a mechanical solution that it says "uses a non-MEMS technique to a move a larger mirror to aim the laser beam and receive the light scattered off the objects in the field," according to spokesperson Erin Freeley. This helps detect and classify objects out to 250 meters. And while most LiDARs use 905 nm lasers (partly for eye safety concerns), Luminar uses a 1550 nm laser (as does AEye), which allows the sensors to see further or create more resolution.