{TAIL ~ Each projector} has an illumination device, a lattice like lens array, {HEAD ~ a display}, and a projection lens 
{ TAIL ~ Each projector } has an illumination device , a lattice like lens array , { HEAD ~ a display } , and a projection lens
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH