Docking station for robotic cleaner

A docking station for a robotic cleaner comprising:

• a housing;
• at least one charging contact coupled to the housing;
• at least three optical emitters disposed within the housing, the at least three optical emitters comprising:
• a first optical emitter configured to generate a first optical signal within a first field of emission;
• a second optical emitter configured to generate a second optical signal within a second field of emission;
• and
• a third optical emitter configured to generate a third optical signal within a third field of emission, the third optical emitter being disposed between the first and second optical emitters and the first, second, and third optical signals being different from each other, wherein the third optical signal is configured to guide a robotic cleaner in a direction of the housing;
• a first shadow box corresponding to the first optical emitter;
• a second shadow box corresponding to the second optical emitter, the first and the second shadow boxes each having a first divider, a second divider, and a third divider, each divider having a corresponding aperture that shapes light that passes therethrough;
• and
• a third shadow box corresponding to the third optical emitter, the first, second, and third shadow boxes being disposed within the housing.