Preventing detection of quadcopter by LIDAR mounted on it

Hi everyone, im trying to mount lidar on UAV platform and observing a problem when lidar is detecting its quadcopter frame and propepellers(fig.1). Mounting on different level on z axis figuring out this problem, but i guess it is not accurate to solve it like this. If someone can help me with this issue, i guess noize or elevation angles might be a souliton for this. Thank you in advance.