The most advanced and accurate method of navigation for robots. Only robots with a laser rangefinder have it. Typically, this is such a tower mounted on the robot. It has a high-precision laser that is invisible to humans and animals but hits the camera of some cameras. Such robots receive information from lidar about surrounding objects and distances to them. Thanks to this, they almost instantly create a map of the visible part of the apartment and start cleaning. A big plus of this type, in addition to the accuracy of cleaning, is the potential ability to clean any area at all. The robot sees that the cleaning is not completed, goes to recharge, and continues its mission. As a rule, in robots with a laser rangefinder, it is possible to see an exact map of your apartment and interact with it. For example, select areas for cleaning or build virtual fences. An example of such a robot is the flagship
Okami U100 Laser.