The invention further relates to {HEAD ~ an apparatus} for calibrating {TAIL ~ a sensor} which may be used for measuring color of a color display in calibration of the display 
for calibrating
The invention further relates to { HEAD ~ an apparatus } for calibrating { TAIL ~ a sensor } which may be used for measuring color of a color display in calibration of the display
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH