{TAIL ~ The first main body} and {HEAD ~ the first lens portion} are made of a same polymer material having a lower melting point and higher fluidity than polyether imide 
{ TAIL ~ The first main body } and { HEAD ~ the first lens portion } are made of a same polymer material having a lower melting point and higher fluidity than polyether imide
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH