Hi Mike
We know that the TSOP still has a spectral sensitivity of 30% at 850nm. But is the TSOP the only solution? The IR ball emits a signal modulated at 40 kHz, there is also the option of evaluating this.
For information, our LIDAR emits an IR_signal in a 50Hz rhythm. The transmission time is only 5ms each time.
After the discussion, there are currently only 2 solutions for me. Either the original solution, that the opponent must not be disturbed, or you ban LIDAR technology. The second solution is easier to use, but is not the better solution.