The coefficient of reflectance of the output reflective layer is determined by a mathematical relationship which takes into consideration the position of the reflective layer from the light entering region and the amount of light which must pass through {HEAD ~ the reflective layer} to provide {TAIL ~ uniform illumination} of the document 
to provide
The coefficient of reflectance of the output reflective layer is determined by a mathematical relationship which takes into consideration the position of the reflective layer from the light entering region and the amount of light which must pass through { HEAD ~ the reflective layer } to provide { TAIL ~ uniform illumination } of the document
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 OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH