In {TAIL ~ some embodiments}, each optical element also provides {HEAD ~ additional aberration correction} for its third optical field 
In { TAIL ~ some embodiments } , each optical element also provides { HEAD ~ additional aberration correction } for its third optical field
OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH