When measuring with more than one sensor, the sensors should be placed and aligned so that they do not interfere with each other. The receiving optics of the sensors have a conical field of view. Everything outside of this field of view is not visible to the sensor and is therefore not disturbing.
Parallel measurement in the same direction:
This scenario is shown in the above figure on the left. The spacing s between the two laser beams must be chosen so that the laser beam of one sensor does not hit the target within the field of view of the other sensor.
In practice, the following formula applies for the minimum spacing s:
smin = 0.1 m + d [m] * 0.004
Parallel measurement in the opposite direction:
This scenario is shown in the second figure on the left. The distance between the two laser beams must be chosen so that the laser exit point of one sensor is outside the field of view of the other sensor. The same formula as above can therefore be applied.
To avoid damaging the sensors, make sure during alignment that the laser beam is not directed directly at the receiving optics of the opposite sensor.
The table on the left shows the permitted minimum distances smin for a set of measuring distances d.