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 a light axis of the lens and {TAIL ~ 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 a light axis of the lens and { TAIL ~ 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 OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH