{TAIL ~ An optical filter} including a plurality of {HEAD ~ dielectric layers} is provided between first and second substrates 
{ TAIL ~ An optical filter } including a plurality of { HEAD ~ dielectric layers } is provided between first and second substrates
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH