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