Perfect Homing Accuracy

Hi All,
I'm looking for the perfect way for homing (+_ 0.01mm error in zeros)
I thing limit switches will not give me such accuracy...
I was advised to combined the index pules from the encoder with the
signal from the switch i.e: the machine won't stop if it sees the
limit switch signal unless the index pules from the encoder is also
seen by this homing is very accurate .
Can this be made by Mach ?

Thanks

Shadi Salhab