{TAIL ~ The trough shaped reflectors} are moved in synchronism with the scanning movement of the beams so that the images of the lamp filaments remain in one dimensional focus throughout scanning of {HEAD ~ the flat document plane} 
{ TAIL ~ The trough shaped reflectors } are moved in synchronism with the scanning movement of the beams so that the images of the lamp filaments remain in one dimensional focus throughout scanning of { HEAD ~ the flat document plane }
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD