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