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