In one embodiment, {HEAD ~ the light sensitive surface} of {TAIL ~ the light sensor} integrates light passing through a cross section of the media along a scanning path of the media 
of
In one embodiment , { HEAD ~ the light sensitive surface } of { TAIL ~ the light sensor } integrates light passing through a cross section of the media along a scanning path of the media
OTH OTH OTH OTH HEAD HEAD 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