{TAIL ~ The quartz substrate} is cut from a crystal and has {HEAD ~ an orientation} with reduced birefringence 
{ TAIL ~ The quartz substrate } is cut from a crystal and has { HEAD ~ an orientation } with reduced birefringence
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH