Further, an annular alignment mark {HEAD ~ AM} having a point of intersection between the optical axis 01 and the image pickup element of the television camera 3 as the center of symmetry and segments X and Y are displayed on {TAIL ~ the television monitor} 5 by the output of the computer 
are displayed on
Further , an annular alignment mark { HEAD ~ AM } having a point of intersection between the optical axis 01 and the image pickup element of the television camera 3 as the center of symmetry and segments X and Y are displayed on { TAIL ~ the television monitor } 5 by the output of the computer
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD 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 OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH