The optical intensity pattern of a two dimensional image field is electrically scanned a line at a time by a shift register access technique, thus providing {HEAD ~ a first stream} of {TAIL ~ bits} for each line 
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The optical intensity pattern of a two dimensional image field is electrically scanned a line at a time by a shift register access technique , thus providing { HEAD ~ a first stream } of { TAIL ~ bits } for each line
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH