Distance-based LED power modulation in surgical tracking system

A tracking array tracking system, comprising:

• a navigation station comprising:
• a tracking sensor;
• and
• a position determination logic block coupled to the tracking sensor;
• a robotic device comprising:
• a tracking array including one or more markers;
• and
• a power module coupled to the tracking array, the power module including one or more variable current sources;
• and
• a robotic device controller coupled to the position determination logic block,
• wherein the robotic device controller is communicatively coupled to the power module of the robotic device, the one or more markers are coupled to the corresponding one or more variable current sources, the power module further includes current-control logic coupled to the one or more variable current sources, and the current-control logic is configured to control, responsive to power modulation control signals received from the robotic device controller, an amount of drive current that is output by each variable current source of the one or more variable current sources.