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