Image Number 5 for United States Patent #8125630.
A tracking system includes an emitter array configured to emit radiation around a subject to be tracked in at least one dimension wherein each emitter or group of emitters is modulated to permit identification of a source of the radiation. A receiver is configured to receive the radiation from the emitter array, wherein one of the emitter array and the receiver are located on the subject to be tracked. A processor is configured to interpret changes in radiation and correlate the changes to a device position to output a device position control signal.
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