It is to be noted that {HEAD ~ the pixel} of {TAIL ~ the sensor portion} will hereinafter be referred to as sensor pixel throughout this specification 
It is to be noted that { HEAD ~ the pixel } of { TAIL ~ the sensor portion } will hereinafter be referred to as sensor pixel throughout this specification
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH