{HEAD ~ The processing optic} tiles the first optical field into a plurality of {TAIL ~ second optical fields} 
{ HEAD ~ The processing optic } tiles the first optical field into a plurality of { TAIL ~ second optical fields }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL