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