A stereo camera with an automatic convergence adjusting device is provided. A
stereo-image
is captured by a CCD through a stereo adapter. A fiducial light beam in a plane
of symmetry which includes a perpendicular bisector line of a segment between the
viewpoints of the right and left parallax images, is projected onto a subject from
light-emitting equipment. A fiducial spot produced by the fiducial light beam is
imaged on both the right and left parallax images and the image loci of the fiducial
spot are detected. The convergence of the stereo adapter is adjusted with reference
to the image loci of the fiducial mark.
