A portable air sterilization apparatus includes a portable chamber forming an interior volume, a portable source for producing a single beam of collimated light energy, and a rotating beam redirector. The portable chamber includes a first end for introducing air into the chamber, a second end for permitting air to exit from the chamber, a transparent orifice through which a single beam of collimated light energy can be introduced into the interior volume of the chamber and at least one reflective wall. The rotating beam redirector is adapted to rotate through a complete revolution about a rotational axis and to redirect the single beam of collimated light energy within the chamber during said revolution.
