How is it possible to change the orientation of a laser beam with gazebo

Dear All I would like to simulate the behavior of a retrofitted laser such as the one which is described in the picture below where (2) is the Lidar and (5) is a mirror which is changing the direction of the laser beam towards the floor. The mirror changes the orientation of some laser beams, so that it will be possible to measure the distance from the current position of a drone (for instance) to either the ceiling or the floor. I am wondering how this behavior can be implemented with gazebo? Thank you very much for your help Fabrice