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