Both laser scanning apparatuses are multi beam scanning apparatuses which form {HEAD ~ an image} on {TAIL ~ a scanned surface}, i.e., the surface of photosensitive member 7, via a plurality of laser beams 2 
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Both laser scanning apparatuses are multi beam scanning apparatuses which form { HEAD ~ an image } on { TAIL ~ a scanned surface } , i.e. , the surface of photosensitive member 7 , via a plurality of laser beams 2
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 OTH OTH OTH OTH OTH OTH