One or more piezoelectric ring bender actuators may provide {HEAD ~ the force} required for compressing the support ring and deflecting {TAIL ~ the optical surfaces} 
One or more piezoelectric ring bender actuators may provide { HEAD ~ the force } required for compressing the support ring and deflecting { TAIL ~ the optical surfaces }
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL