So you want to bring 360-degree sensing capabilities to your robot or drone? Sweep can help. It is a LiDAR sensor that allows your robot to sense and avoid obstacles. It can also be used for mapping purposes. Sweep can be used for virtual curtains to sense when a particular area has been interrupted.
Sweep consists of a rotating head, sensor, encoder, drive motor, insulator, base, and a few other parts. It is designed to be modular. It has a range of 40 meters and 360 degrees field of view. You can find it on Kickstarter.