Since {HEAD ~ the lens array} 4 is provided with {TAIL ~ micro lenses} 41 in rows in a sub scanning direction, deterioration of an amount of light level resulting from the displacement between a light axis of the lens and an image sensor 6 is not generated 
is provided with
Since { HEAD ~ the lens array } 4 is provided with { TAIL ~ micro lenses } 41 in rows in a sub scanning direction , deterioration of an amount of light level resulting from the displacement between a light axis of the lens and an image sensor 6 is not generated
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL 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 OTH OTH OTH OTH OTH OTH OTH OTH