@Emin_Bu - Yes, the servo can be controlled to point the laser in the direction of flight but you have to tell the LW20 which way to aim using data from the flight controller. This is similar to steerable headlights that you get on many cars these days.
There are cheap servos and expensive servos, with Dynamixel falling squarely into the second category. While the specifications of the Dynamixel servos look very good, the real question is, how well will the servo will perform as a component in a LiDAR? Both the cheap and expensive servos have limitations and I will be presenting a lot more information about this in the future.
The LW20 with an inexpensive servo will make a high performance, light weight sensor for obstacle detection and collision avoidance. How far we can push the technology in the future remains to be seen .