Additionally {HEAD ~ negative phase difference} can be provided to convert linear polarized light into {TAIL ~ left handed circling polarized light} or elliptic polarized light 
Additionally { HEAD ~ negative phase difference } can be provided to convert linear polarized light into { TAIL ~ left handed circling polarized light } or elliptic polarized light
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH