A layer of transparent acrylate polymer dielectric between the metal layers completes {HEAD ~ the interference filter}, which may be sandwiched between {TAIL ~ protective layers} 
sandwiched between
A layer of transparent acrylate polymer dielectric between the metal layers completes { HEAD ~ the interference filter } , which may be sandwiched between { TAIL ~ protective layers }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL