A laser beam 16 is focused through the opening 13 by a lens 14 and on to {HEAD ~ a panel} of {TAIL ~ substrate material} 18 positioned underneath the opening 13 
of
A laser beam 16 is focused through the opening 13 by a lens 14 and on to { HEAD ~ a panel } of { TAIL ~ substrate material } 18 positioned underneath the opening 13
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH