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