When you take a range, the sensor likes to see 20Million photons per second. If it gets more, it turns off SPADS on the next range. If it gets fewer it adds SPADS.
The SPAD is a Single Photon Avalanche Diode. and there are 256 of them in the array. (However some are partially covered to allow for a finer adjustment.
When you get a range you will return the signal rate. One can use this directly to determine if the range was accurate (Count will be about 20M).
Or one can use this to get a level of actual signal (Take the signal rate and divide it by then number of SPADs used.)
A near target will have a much greater signal strength as the number of photons goes down as a square of the distance.
Given a known target - like if the sensor is expected to see the same thing every time - one might be able use the distance and signal rate to get a bit more accuracy. But that would take a lot of analysis on your part. Maybe you could add a couple of mm on a very strong signal, or maybe subtract a couple on a weak signal.
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