These conditions can occur, for example, for {HEAD ~ implementations} employing {TAIL ~ planar image sensor} arrays wherein 
employing
These conditions can occur , for example , for { HEAD ~ implementations } employing { TAIL ~ planar image sensor } arrays wherein
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH