Abstract: Embodiments of the invention include a power beam receiver that will not reflect light beyond the regulatory limits for human exposure, except along paths known to be without people. In one embodiment, a baffle is used to trap reflections from surfaces of the receiver. In a second embodiment, the power beam receiver is arranged so that reflections are reflected to another surface of the receiver. These surfaces may be designed as a retroreflector. In a third embodiment, an intentional scattering medium is added to the power beam receiver so that parallel light rays incident on the front surface of the power beam receiver are scattered through a series of angles. As a result, any light escaping the system is diffused.

Abstract: A mirror assembly with a reflecting surface is used to redirect a power beam through free space. The mirror assembly is actuated on at least one axis, and preferably at least two axes, so that it can move through many angles based on control signals from the power beaming system. The mirror assembly receives an optical transfer of power through free space from a power beam transmitter. Thus, the movement of the mirror is powered from the power beam itself. Two or more of these mirrors can be used in a power beaming system, thus creating many different beam paths through a volume of free space.