In {HEAD ~ this way}, the area above the photoreceptor can be used both for a reception area and for {TAIL ~ a charge transfer area} 
In { HEAD ~ this way } , the area above the photoreceptor can be used both for a reception area and for { TAIL ~ a charge transfer area }
OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL