Methods and devices for crosstalk compensation

A Time of Flight system comprising:

• an optical source configured to emit an light into an environment;
• an optical receiver comprising:
• a first histogram region comprising a plurality of radiation-sensitive pixels;
• a first crosstalk-monitoring zone comprising a plurality of radiation-sensitive pixels;
• and
• a second crosstalk-monitoring zone comprising a plurality of radiation-sensitive pixels;
• and
• a processor in communication with the optical source, the optical receiver and a memory wherein the memory stores an instruction set that, when executed, causes the processor to:
• drive the optical source to emit light for a time of flight ranging;
• collect data for a photon-count histogram from the first histogram region;
• calculate a dynamic crosstalk compensation value for the first histogram region from a first set of photon-event data received from the first crosstalk-monitoring zone during the time of flight ranging and a second set of photon-event data received from the second crosstalk-monitoring zone during the time of flight ranging;
• and
• adjust the photon-count histogram based on the dynamic crosstalk compensation value.

A method comprising:

• measuring photon-event data from a first leakage-monitoring zone of an optical receiver;
• determining that a leakage value of the first leakage-monitoring zone is below a first threshold value;
• measuring a first set of photon-event data collected from a first crosstalk-monitoring zone of the optical receiver during a first period of time of flight ranging;
• measuring a second set of photon-event data collected from a second crosstalk-monitoring zone of the optical receiver during the first period of time of flight ranging;
• generating a first dynamic crosstalk compensation value for a first histogram region of the optical receiver using the first set of photon-event data, the second set of photon-event data, and a native cross-talk compensation value for the first histogram region of the optical receiver;
• measuring a temperature;
• and
• producing a final dynamic crosstalk compensation value for the first histogram region by adjusting the first dynamic crosstalk compensation value based on the temperature.