{HEAD ~ The thin film filter} is formed on {TAIL ~ each} of the first and second lens portions 
is formed on
{ HEAD ~ The thin film filter } is formed on { TAIL ~ each } of the first and second lens portions
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH