The objects of the present invention are achieved by utilizing a vidicon and {HEAD ~ a partially reflecting partially transmitting mirror} positioned so as to permit {TAIL ~ the simultaneous viewing} of the original document and the reproduced document 
The objects of the present invention are achieved by utilizing a vidicon and { HEAD ~ a partially reflecting partially transmitting mirror } positioned so as to permit { TAIL ~ the simultaneous viewing } of the original document and the reproduced document
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH