3D scanner - Wikipedia

A 3D scanner is a device that analyses a real-world object or environment to collect data on its shape and possibly its appearance (e.g. colour). The collected data can then be used to construct digital three-dimensional models.. Many different technologies can be used to build these 3D-scanning devices; each technology comes with its own limitations, advantages and costs.

SICK Laser Rangefinder (LIDAR) Disassembled | Hizook

This is the SICK with it's cover off. You can clearly see the motor (copper colored piece) that spins the primary mirror. This mirror scans the laser beam, coming from the laser module positioned in the middle of the "U-shaped" PCB, across the environment to obtain time-of-flight (TOF) ranges.

Comparing low-cost 2D scanning Lidars - DIY Robocars

It’s now possible to buy small scanning 2D Lidars for less than $400 these days, which is pretty amazing, since they were as much as $30,000 a few years ago.