1. A time of flight measurement apparatus comprising: one or more lasers each configured to transmit light; an optical receiver configured to receive light; laser control circuitry configured to cause the one or more lasers to transmit a first pulse of light prior to a second pulse of light, the laser control circuitry further configured to cause the one or more lasers to transmit the second pulse of light prior to a time at which a reflected portion of the first pulse of light is received by the optical receiver; and elapsed time circuitry configured to measure an elapsed time between transmission of the first pulse of light by the laser and reception of the reflected portion of the first pulse of light by the optical receiver, wherein the first and second pulses of light are of the same frequency but are otherwise distinguishable when received by the apparatus.