Mirror coupling

A system comprising:

• a light-emitter device;
• a photodetector;
• a rotatable mirror disposed about a shaft defining a rotational axis, wherein the rotatable mirror comprises:
• a multi-sided structure comprising a plurality of exterior surfaces and an interior surface, wherein each exterior surface of the plurality of exterior surfaces comprises a respective reflective surface to define a plurality of reflective surfaces;
• and
• a support member that couples the interior surface of the multi-sided structure to the shaft, wherein the support member comprises a wider portion coupled to the interior surface of the multi-sided structure and a narrower portion between the wider portion and the shaft;
• and
• a controller that executes instructions so as to carry out operations, the operations comprising:
• causing the rotatable mirror to rotate about the rotational axis;
• and
• causing the light-emitter device to emit light pulses toward at least one reflective surface of the plurality of reflective surfaces such that at least a portion of the light pulses interact with an external environment so as to form reflected light pulses.