means for directing {HEAD ~ the incoherent light beam} into a plurality of adjacent incoherent light beams which form a continuous line of illumination across {TAIL ~ a portion} of an output surface, 
means for directing { HEAD ~ the incoherent light beam } into a plurality of adjacent incoherent light beams which form a continuous line of illumination across { TAIL ~ a portion } of an output surface ,
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH