Considering the output channels of the PMD sensor , two values are of importance: the difference
of the read out channels delivering the phase information , and the sum of both channels which is
proportional to the in cident light and the overall photo generated charge carriers. As mentioned
above, an imp o rtan t figure of m e rit for distance measure ment is the rat io of t h e measure d signal
difference compared to the signal sum, the PMD contrast kPMD.