{TAIL ~ first and second means} for subjecting {HEAD ~ an optical image} of an original to photo electric conversion with respectively wide and narrow wavelength ranges 
{ TAIL ~ first and second means } for subjecting { HEAD ~ an optical image } of an original to photo electric conversion with respectively wide and narrow wavelength ranges
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH