Each plurality of {HEAD ~ optical elements} further tiles its received corrected optical field into {TAIL ~ a plurality} of third optical fields 
Each plurality of { HEAD ~ optical elements } further tiles its received corrected optical field into { TAIL ~ a plurality } of third optical fields
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH