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