target evaluating means for viewing said luminescent target means and for processing luminescent values at {HEAD ~ selected test points} to develop {TAIL ~ test values} as a function of luminescent values; and 
to develop
target evaluating means for viewing said luminescent target means and for processing luminescent values at { HEAD ~ selected test points } to develop { TAIL ~ test values } as a function of luminescent values ; and
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH